CN112821075B - Multi-frequency antenna and phase modulation switching control mechanism thereof - Google Patents

Abstract

The invention provides a multi-frequency antenna and a phase modulation switching control mechanism thereof, wherein the mechanism comprises an output gear, a straight mechanism and a revolving mechanism; the straight-moving mechanism is used for controlling the output gear to be switched among a plurality of positions in the axial direction of the output gear, so that the output gear is connected with any one of the frequency-selecting phase modulation units at two positions; the epicyclic mechanism is used for controlling the circumferential rotation of the output gear; for each frequency-selecting phase modulation unit, at a first position, the output gear is linked with a transmission nut in the frequency-selecting phase modulation unit to linearly run and is suitable for aligning any one of a plurality of phase modulation control elements by an external gear; and at the second position, the output gear is linked with the transmission nut to rotate circumferentially so as to be suitable for controlling the phase shift of the aligned phase modulation control piece by the outer gear. The switching control mechanism for phase shift can realize selective phase shift control of a plurality of unitized frequency-selecting phase-modulating units and realize stable and controllable phase shift control.

Description

Multi-frequency antenna and phase modulation switching control mechanism thereof

Technical Field

The invention relates to the technical field of communication, in particular to a multi-frequency antenna and a phase modulation switching control mechanism thereof.

Background

With the increasing number of mobile communication terminal users, the demand for network capacity of stations in a mobile cellular network is increasing, and it is required to minimize interference between different stations, even between different sectors of the same station, that is, to maximize network capacity and minimize interference. This is usually achieved by adjusting the downtilt angle of the antenna beam at the station.

In two ways of adjusting the beam downtilt angle, namely, mechanical downtilt and electronic downtilt, the electronic downtilt has obvious advantages and is the current mainstream and future development trend. The control of the electrical downtilt angle mainly includes two major categories, namely an internal control and an external control, wherein the internal control is the mainstream at present and in the future.

However, the motors used to drive the phase shifters in the conventional transmission device still correspond to the transmission mechanisms of the phase shifters one-to-one, the number of the motors is not reduced, and the number of the driving circuits in the control module is not reduced as the number of the motors. If the frequency bands of the antenna are increased, the structure of the transmission system is more complex and heavy, which affects the reliability of the multi-frequency antenna.

The applicant has practiced the related art solutions to the above problems, but there is still a room for improvement in the aspects of stable control and simple operation, and especially in the case of one control, the room for improvement of the related structure is still large.

Disclosure of Invention

The first objective of the present invention is to provide a phase modulation switching control unit for conveniently switching and controlling a plurality of phase shift modules.

Another object of the present invention is to provide a multi-band antenna.

In order to realize the purpose, the invention provides the following technical scheme:

the invention provides a phase modulation switching control mechanism, wherein:

the switching control mechanism comprises an output gear, a straight-moving mechanism and a turnover mechanism;

the straight-moving mechanism is used for controlling the output gear to be switched among a plurality of positions in the axial direction of the output gear so as to enable the output gear to be connected with any one of the frequency-selecting phase-modulating units at two positions;

the epicyclic mechanism is used for controlling the circumferential rotation of the output gear;

for each connected frequency-selecting phase modulation unit, at the first position of the two positions, the output gear is linked with a transmission nut in the frequency-selecting phase modulation unit to linearly run and is suitable for any one of a plurality of phase modulation control pieces which are linearly arranged by aligning the external gear of the output gear with the external gear of the frequency-selecting phase modulation unit; in the second position, the output gear is linked with the transmission nut to rotate circumferentially so as to be suitable for controlling the aligned phase modulation control element to implement phase shift by using the external gear.

Further, the straight-moving mechanism is used for controlling a box body covering the output gear to linearly move so as to drive the output gear to linearly move along the axial direction, so that the output gear is switched among a plurality of positions.

Furthermore, the straight-moving mechanism comprises a first control part capable of rotating circumferentially, a driven screw, a driving nut, a box body provided with the output gear and a sliding rod supporting the box body to slide, wherein a bevel gear is arranged at the tail end of the first control part and is meshed and connected with the bevel gear formed on the driving nut, the driving nut is screwed with the driven screw, and the driven screw is fixedly arranged with the box body so as to be linked with the output gear to slide on the sliding rod along with the box body when the box body is driven by the rotation of the driving nut which is relatively fixed.

Furthermore, but turnover mechanism includes circumferential direction's second control part and transmission shaft, the end of second control part is equipped with the bevel gear, with the bevel gear of transmission shaft one end meshes mutually and is connected, the transmission shaft has the cross-section and is polygonal transmission portion, and this transmission portion end passes cross sectional shape matched with shaft hole on the output gear, with the coaxial setting of driven screw rod of rectilinear mechanism to transmit moment through the circumferential direction of second control part for the output gear makes circumferential direction.

Further, the driven screw is provided with a containing cavity at one end opposite to the transmission shaft so as to allow the transmission part of the transmission shaft to be contained when the output gear slides.

In some embodiments, the number of the frequency-selecting phase-modulating units is two, the two frequency-selecting phase-modulating units are respectively arranged on two axial sides of the output gear, when the output gear is in the first position, only the first linkage gears of the corresponding frequency-selecting phase-modulating units are engaged, and the first linkage gears are linked with the transmission nuts to linearly run so as to realize the alignment by the external gears; when the output gear is at the second position, the first linkage gear and the second linkage gear of the corresponding frequency-selecting phase-modulating unit are simultaneously meshed, so that the first linkage gear and the second linkage gear jointly act to drive the transmission nut to rotate circumferentially and perform phase shifting by the outer gear of the transmission nut.

Furthermore, in each frequency-selecting phase modulation unit, the first linkage gear and the second linkage gear are coaxially arranged side by side and have the same specification of meshing gear configuration.

In some embodiments, the frequency-selective phase modulation unit includes a phase-shift transmission mechanism and a plurality of phase modulation control elements, and each phase modulation control element is used for controlling a signal of a corresponding frequency band in the antenna to implement phase modulation;

the phase-shifting transmission mechanism comprises a bracket, a screw and nut transmission mechanism and a guide mechanism;

the screw nut transmission mechanism comprises a first linkage gear, a guide slide bar, a transmission screw and a transmission nut, wherein the transmission screw and the transmission nut are screwed mutually;

the guide mechanism comprises a plurality of guide rods, shaft sleeves and second linkage gears, the guide rods are distributed in the circumferential direction, two ends of each guide rod are respectively connected with the shaft sleeves, and the second linkage gears are sleeved on one of the shaft sleeves;

the guide mechanism is sleeved on the transmission screw rod through a shaft sleeve, so that the second linkage gear and the first linkage gear are arranged side by side, and each guide rod of the guide mechanism correspondingly penetrates through the plurality of through holes in the transmission nut;

and an external gear is formed on the periphery of the transmission nut and is used for being meshed with any one phase modulation control piece.

Furthermore, the first linkage gear receives the rotating torque of the output gear to drive the transmission screw to rotate circumferentially, and correspondingly drives the transmission nut to perform linear motion along the guide rod and the sliding rod.

Further, the first linkage gear and the second linkage gear simultaneously receive the same rotating torque of the output gear to synchronously rotate, and correspondingly drive the outer gear on the transmission nut to execute circumferential rotation.

Furthermore, the phase modulation control elements are divided into two rows which are parallel and staggered side by side at two axial sides of the transmission screw rod.

Further, the phase modulation control part is a rack and is used for forming a gear rack transmission mechanism with the outer gear.

Furthermore, the section of a guide rod of the guide mechanism is trapezoidal.

The invention also provides a multi-frequency antenna, which comprises a plurality of phase-shifting parts corresponding to a plurality of frequency bands, and the multi-frequency antenna comprises the phase modulation switching control unit.

The technical scheme provided by the invention has the beneficial effects that:

the phase modulation switching control unit provided by the invention can realize switching between at least two modularized frequency-selecting phase modulation units by switching and controlling the output gear to different positions, and then each frequency-selecting phase modulation unit can be further connected with the frequency-selecting phase modulation unit at two positions, wherein one position can realize that the phase modulation control piece corresponding to one frequency band is selected and aligned in the frequency-selecting phase modulation unit, and the other position can control the aligned phase modulation control piece to implement phase shift, and the phase shift work of the target phase modulation control piece is completed through the matching of the switching control mechanism. Through switching control mechanism switch output gear position state, can realize through simple control to the switching control between a plurality of modules, between a plurality of phase modulation control pieces to control the stable phase shift of corresponding antenna frequency channel signal.

The invention has relatively simple structure, realizes the unified control of a plurality of frequency-selecting phase modulation units and a plurality of phase modulation control elements by only two-way transmission, can realize two-way transmission and a plurality of connection positions and states by sharing one output gear, is skillfully combined, has stable structure, ensures the stable operation of the control process, and effectively controls the improvement cost.

Other additional benefits of the invention will be given in the detailed description.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below.

Fig. 1 is a schematic structural view of a frequency-selective phase modulation apparatus to which a switching control mechanism for phase modulation of the present invention is applied;

FIG. 2 is a schematic diagram of the internal structure of the frequency-selective phase modulation apparatus of the present invention;

FIG. 3 is an enlarged fragmentary view of the central portion of FIG. 2, showing primarily the gearing arrangement thereof;

FIG. 4 is a schematic view of a drive screw of the frequency-selective phase modulation unit of the present invention;

FIG. 5 is a schematic structural view of a first linkage gear of the frequency-selective phase modulation unit of the present invention;

FIG. 6 is a schematic view of a transmission nut of the frequency-selecting phase-modulating unit of the present invention;

FIG. 7 is a schematic view of the connection structure of the guide rod and a single shaft sleeve of the frequency-selecting phase-modulating unit of the present invention;

FIG. 8 is a schematic view of a first linkage gear of the frequency-selective phase modulation unit of the present invention;

FIG. 9 is a schematic view of an assembly structure of the phase shift transmission mechanism of the present invention;

FIG. 10 is a schematic diagram of the phase modulation control of the present invention;

FIG. 11 is a schematic view of an active nut of the switching control mechanism of the present invention;

FIG. 12 is a schematic view of an assembly structure of a passive screw and a second box of the switching control mechanism of the present invention;

FIG. 13 is a schematic view of a transmission shaft of the switching control mechanism of the present invention;

FIG. 14 is a schematic view of an output gear of the shift control mechanism of the present invention;

fig. 15 is a schematic view of a part of the internal structure of a frequency-selective phase modulation apparatus according to the present invention in a use state;

FIG. 16 is an enlarged partial view of the central portion of FIG. 15;

FIG. 17 is a schematic diagram of a phase modulation control element fixing structure of an embodiment of the frequency-selective phase modulation apparatus of the present invention;

fig. 18 is a view showing a structure of a fixing member for fixing a phasing control member of the frequency-selective phasing apparatus of the invention;

FIG. 19 is a schematic structural view of a first box body for assembling a transmission nut of the frequency-selecting phase-modulating device of the present invention;

fig. 20 is a schematic diagram of the internal structure of another use state of the frequency-selective phase modulation apparatus according to the present invention.

Detailed Description

Embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather are provided for a more thorough and complete understanding of the present invention. It should be understood that the drawings and the embodiments of the invention are for illustration purposes only and are not intended to limit the scope of the invention.

The term "including" and variations thereof as used herein is intended to be open-ended, i.e., "including but not limited to". The term "coupled" may refer to direct coupling or indirect coupling via intermediate members (elements). The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Relevant definitions for other terms will be given in the following description.

It should be noted that the terms "first", "second", and the like in the present invention are only used for distinguishing the devices, modules or units, and are not used for limiting the devices, modules or units to be different devices, modules or units, and are not used for limiting the sequence or interdependence of the functions executed by the devices, modules or units.

The frequency-selecting phase modulation device adopting the phase modulation switching control mechanism structure provided by the invention comprises a switching control mechanism A and at least two frequency-selecting phase modulation units B as shown in figures 1 and 2, wherein each frequency-selecting phase modulation unit B comprises a phase-shiftingtransmission mechanism 1 and a plurality of phasemodulation control pieces 2.

The phase-shiftingtransmission mechanism 1 comprises abracket 10, a screwnut transmission mechanism 11 and aguide mechanism 12;

referring to fig. 3, the screw andnut transmission mechanism 11 includes afirst linkage gear 111, aguide sliding rod 112, and atransmission screw 113 and atransmission nut 114 screwed to each other, thefirst linkage gear 111 is fixedly sleeved on one end of thetransmission screw 113, thetransmission screw 113 and theguide sliding rod 112 are supported on thebracket 10 in parallel, and thetransmission nut 114 is installed in afirst box 115 pivoted to theguide sliding rod 112.

As shown in FIG. 4, thedrive screw 113 includes a fixedhead 1130, a threadedportion 1132 for the travel of thedrive nut 114 thereon, and asmooth portion 1131 between the fixedhead 1130 and the threadedportion 1132.

Referring to fig. 5, thefirst linkage gear 111 includes a mountinghole 1110 matching the shape of the fixinghead 1130 of thedrive screw 113, so that the two can rotate in the same direction after being mounted and fixed. In this embodiment, the mounting through-hole 1110 is a hexagonal through-hole.

As shown in fig. 6, the drivingnut 114 includes anut hole 1140 formed at the middle portion, anexternal gear 1141 formed at the outer circumference thereof, and a passinghole 1142 provided between thenut hole 1140 and theexternal gear 1141.

The drivingnut 114 sleeves the drivingscrew 113 in thenut hole 1140, and thenut hole 1140 and thethread portion 1132 of the drivingscrew 113 form a screw-nut driving mechanism. When the external rotation torque drives thefirst linkage gear 111, the drivingscrew 113 rotates synchronously in the same direction, so that the drivingnut 114 and thefirst box 115 installed therein are driven, and thefirst box 115 moves linearly back and forth along the drivingscrew 113 and theguide sliding rod 112 under the condition that thefirst box 115 is limited by theguide sliding rod 112.

Thetransmission nut 114 is provided with astop block 1143 on a surface facing thefirst linkage gear 111, and is configured to cooperate with a limit port (not shown) disposed at a thread start position of thetransmission screw 113 to limit one end of the screw nut transmission mechanism in a linear stroke direction, and the other end of the linear stroke can also be limited in various forms, which is not repeated.

As shown in fig. 7 and 8, theguide mechanism 12 includes a plurality ofguide rods 121,bushings 122, and asecond interlocking gear 123, wherein thebushings 122 are respectively disposed at two ends of theguide rods 121, so as to fix theguide rods 121 between the twobushings 122. The end of theshaft sleeve 122 at the same end as the fixedhead 1130 of the drivingscrew 112 is provided with a connectingend 1221 fixedly connected with thesecond interlocking gear 123, and the shape of the connecting end is matched with the shape of thesleeve hole 1230 of thesecond interlocking gear 123, so as to fix thesecond interlocking gear 123 on theshaft sleeve 122. When thesecond interlocking gear 123 is rotated, thesleeve 122 and theguide rod 121 also rotate along with thesecond interlocking gear 123. Theshaft sleeve 122 connected to thesecond linkage gear 123 is further provided with a throughhole 1222, which is sleeved at one end of thetransmission screw 112 where thefirst linkage gear 111 is disposed, and makes thefirst linkage gear 111 outside and thesecond linkage gear 123 inside. The outer side of theother shaft sleeve 122 forms a pivot shaft pivoted on the bracket, and the inner side forms a hole slot (not shown) for the same end of thetransmission screw 113 to pivot therein, so that thetransmission screw 113 and/or the guide mechanism can rotate under the driving of the two interlocking gears 111, 123 respectively or together when necessary.

In this embodiment, the number of theguide rods 121 is three, and eachguide rod 121 is circumferentially distributed and locked between twobushings 122. The cross-sectional shape of theguide rods 121 matches with the shape of the throughholes 1142 in the drivingnut 114, the number of theguide rods 121 matches with the number of the throughholes 1142, and the throughholes 1142 of the drivingnut 114 are respectively sleeved on eachguide rod 121, so that the drivingnut 114 can move in the same direction along with the rotation of theshaft sleeve 122.

Preferably, theguide rod 121 has a trapezoidal cross section. Of course, other cross-sectional shapes can be provided, and theoretically, theguide rod 121 can be coupled with the drivingnut 114 only by being disposed through the driving nut.

The specific assembly structure of thephase shifting transmission 1 is shown in fig. 9, and the fixinghead 1130 of thedrive screw 113 is exposed out of the connectingend 1221 of theside sleeve 122 of theguide mechanism 12. Thesmooth portion 1131 of thedrive screw 113 is located in the throughbore 1222 of the bushing. Thefirst interlocking gear 111 is fixedly mounted on the fixinghead 1130 except the exposed connectingend 1221, and thesecond interlocking gear 123 is fixedly mounted on the connectingend 1221 of thebushing 122, so that thesecond interlocking gear 123 is arranged side by side with thefirst interlocking gear 111, in this embodiment, thefirst interlocking gear 111 and thesecond interlocking gear 123 have the same radial dimension and meshing tooth specification configuration, and two identical gears may be used. In addition, the threeguide rods 121 correspondingly pass through the plurality of throughholes 1142 of the drivingnut 114, so that they are circumferentially distributed on the periphery of the drivingscrew 113. On the basis of this structure, there are several cases that different motion control effects are generated on thetransmission nut 114 by controlling different interlocking gears as follows:

when thefirst linkage gear 111 is rotated independently and thefirst box 115 enclosing thetransmission nut 114 is limited by theguide sliding rod 112, thetransmission nut 114 moves axially along theguide rod 121 and thetransmission screw 113 under the transmission action of the screw nut transmission mechanism, which can be used to realize the linear operation of thetransmission nut 114, so that thetransmission nut 114 can be positioned to the phase modulation control pieces corresponding to different frequency bands;

if thesecond interlocking gear 123 is rotated alone, the drivingnut 114 rotates along with theguide rod 121 in the circumferential direction, but since thefirst interlocking gear 111 is not rotated and thus the drivingscrew 113 is not moved, the drivingnut 114 theoretically moves along theguide rod 121 and the drivingscrew 113 in the circumferential direction and the axial direction simultaneously, which is not practical in the present invention and thus does not affect the implementation of the present invention.

When thefirst linkage gear 111 and thesecond linkage gear 123 are simultaneously rotated in the same direction, since thefirst linkage gear 111 and thesecond linkage gear 123 have the same radial dimension, the relative movement directions of thetransmission screw 113 and thetransmission nut 114 are the same direction and the same speed, and thetransmission nut 114 is enclosed in thefirst box 115 but can freely rotate therein, in this state, thetransmission nut 114 stays at the same axial position and moves circumferentially along with theguide rod 121. The rotational torque output by thedrive nut 114 rotating in place can act on the selected phasing control element to effect phase shifting control.

In the frequency-selecting phase modulation unit B of the present invention, the phasemodulation control members 2 are divided into two opposite rows, parallel to and staggered from each other and arranged side by side on both sides of the axial direction of thetransmission screw 113, referring to fig. 1, by this arrangement, each phasemodulation control member 2 has an exclusive use of one width of the axial movement stroke of thetransmission nut 114, that is, an exclusive use of one axial position, so that when thetransmission nut 114 moves axially along thetransmission screw 113 by rotating thefirst transmission gear 111, thetransmission nut 114 can be aligned with only one phasemodulation control member 2 in each corresponding axial position.

Each phasemodulation control element 2 corresponds to a corresponding frequency band signal of the antenna and is used for connecting a phase shifting element of the corresponding frequency band signal. The radiation unit column for radiating the frequency band signal is subjected to phase shifting by one or more phase shifters and then fed into each corresponding radiation unit of the radiation unit column, and the phase shifting of each phase shifter is realized by the movement of the phase shifting part.

As shown in fig. 10, the phasingcontrol member 2 is in a rack shape, and arack 20 in parallel to be engaged with theexternal gear 1141 is provided on a side opposite to theexternal gear 1141 of thepower transmission nut 114, and constitutes a rack and pinion transmission mechanism with theexternal gear 1141. Therefore, after thefirst linkage gear 111 is rotated to move thetransmission nut 114 to the axial position corresponding to the corresponding phasemodulation control element 2, theexternal gear 1141 is meshed with the phasemodulation control element 2 corresponding to the position, and then thefirst linkage gear 111 and thesecond linkage gear 123 are simultaneously rotated in the same direction, thetransmission nut 114 rotates circumferentially at the position where the transmission nut stops, and theexternal gear 1141 is meshed with the side-by-side racks 20 to drive the phasemodulation control element 2 to move, so that linear torque is output to the phase shift part to drive the phase shift part to shift to realize phase shift.

In this embodiment, a state in which thefirst linkage gear 111 and thesecond linkage gear 123 of the phaseshift transmission mechanism 21 synchronously rotate to drive theexternal gear 1141 to control the phase shift of one phasing control member 22 is defined as a first state; thefirst linkage gear 111 is independently rotated to control the position of thetransmission nut 114, so that the state that theouter gear 1141 is meshed in one of the phasemodulation control elements 2 is defined as a second state;

in this embodiment, the frequency-selective phase modulation apparatus has two frequency-selective phase modulation units B1 and B2, the two frequency-selective phase modulation units B1 and B2 are arranged side by side and symmetrically along the same direction, and thefirst linkage gear 111 and thesecond linkage gear 123 are arranged at opposite ends of each other, referring to fig. 2.

The switching control mechanism a is used for controlling theoutput gear 3 to switch the state between thefirst linkage gear 111 and thesecond linkage gear 123 of the two frequency-selecting phase-modulating units B, and is used for controlling thefirst linkage gear 111 and thesecond linkage gear 123 of any one frequency-selecting phase-modulating unit B to realize state switching.

Referring to fig. 3, the switching control mechanism a includes theoutput gear 3, arectilinear motion mechanism 4 and anepicyclic mechanism 5, therectilinear motion mechanism 4 is provided with afirst control portion 41 for controlling theoutput gear 3 to slide along the axial direction to engage with a corresponding interlocking gear of any frequency-selecting phase modulation unit to switch different states thereof, and theepicyclic mechanism 5 is provided with asecond control portion 51 for controlling theoutput gear 3 to rotate circumferentially to drive the corresponding interlocking gears 111 and 123 in the different states to rotate.

Specifically, in the present embodiment, the straight-movingmechanism 4 includes thefirst control portion 41 capable of rotating circumferentially, apassive screw 42, a drivingnut 44, asecond box 43 for mounting theoutput gear 3, and a slidingrod 45 for supporting thesecond box 43 to slide.

As shown in fig. 11, the drivingnut 44 is formed with abevel gear 441 at one end, and the internal thread structure thereof constitutes a nut screw transmission with the drivenscrew 42.

Thefirst control portion 41 has abevel gear 411 at its end, which is engaged with abevel gear 441 formed on the drivingnut 44.

The drivingnut 44 and the drivenscrew 42 are screwed together, and the drivenscrew 42 and thesecond box 43 are fixed together, so that when the drivingnut 44 is rotated and driven, theoutput gear 3 in thesecond box 43 is driven to slide on the slidingrod 45 along with thesecond box 43.

As shown in fig. 12, anaccommodating chamber 431 is provided at one end of thesecond box 43 fixedly connected to thepassive screw 42, and a throughhole 430 is provided at a connecting portion of theaccommodating chamber 431 and thesecond box 43, through which theaccommodating chamber 431 can enter.

Referring to fig. 3, theepicyclic mechanism 5 comprises thesecond control part 51 and atransmission shaft 52 which can rotate circumferentially, and thesecond control part 51 is provided with abevel gear 510 at the end thereof, which is engaged with abevel gear 520 at one end of thetransmission shaft 52. As shown in fig. 13 and 14, thetransmission shaft 52 has atransmission portion 521 with a polygonal cross section, and the end of thetransmission portion 521 passes through theshaft hole 30 with a matched cross section shape on theoutput gear 3 and is coaxially arranged with the drivenscrew 42 of the straight-movingmechanism 4, so that the torque is transmitted to theoutput gear 3 through thetransmission shaft 52 to rotate in the circumferential direction by the circumferential rotation of thesecond control portion 51. Meanwhile, as thesecond case 43 and theoutput gear 3 slide to receive thetransmission portion 521, theaccommodating chamber 431 of thesecond case 43 also gradually receives thetransmission portion 521 at one side, and thetransmission portion 521 then passes through theshaft hole 30 and partially enters theaccommodating chamber 431, and at this time, the distance between the drivenscrew 42 and thetransmission shaft 52 is shortened. In the above process, when thesecond control portion 51 is reversely controlled to rotate, the operation mechanism of thetransmission shaft 52 and the drivenscrew 42 is naturally opposite, and details are omitted.

One end of theshaft hole 30 of theoutput gear 3 is further provided with acoaxial cylinder 31, when theoutput gear 3 and thesecond box 43 are assembled, theaccommodating cavity 431 of thesecond box 43 is sleeved with thecoaxial cylinder 31, and thetransmission part 521 of thetransmission shaft 52 penetrates through theshaft hole 30 of the output gear. When thesecond box 43 and theoutput gear 3 slide, thetransmission portion 521 enters the space where thecoaxial cylinder 31 and theaccommodating chamber 431 are located. In other embodiments, other mechanisms may be provided to make thesecond case 43 and theoutput gear 3 escape from thetransmission portion 521 in a proper space during sliding, and theaccommodating cavity 431 is not necessarily provided coaxially therewith in this embodiment.

The sliding range of thesecond case 43 on the slidingrod 45 is a distance that makes theoutput gear 3 in thesecond case 43 suitable for running between the two frequency-selective phasing units B1 and B2. Referring to fig. 2 and 15, as at one end of the coasting range, theoutput gear 3 meshes with the two interlockinggears 111 and 123 of the first phasing unit B1, and at the other end of the coasting range, theoutput gear 3 meshes with the two interlockinggears 111 and 123 of the second phasing unit B2.

The basic design principle of the frequency-selective phase modulation unit according to the invention is further illustrated by an operating embodiment of the frequency-selective phase modulation apparatus.

Setting a state of the frequency-selecting phase modulation device as an initial state, if theoutput gear 3 and thesecond box body 43 are located at the initial positions of the sliding range, thetransmission nuts 114 of the two frequency-selecting phase modulation units B are both arranged at the initial positions of one end. Of course, these starting positions can be designed by the skilled person according to the design habit of the skilled person, and the design of each starting state is a reference point, which is not limited in the present invention.

With reference to fig. 2 and 15, after determining that thetarget phasing control 2 is in the position of the frequency-selective phasing device, the phasingcontrol 21 at one end of the frequency-selective phasing unit B2 in fig. 15 is the target phasing control of the current operation.

Thefirst control part 41 is driven, and thebevel gear 411 at the end of thefirst control part 41 is engaged with thebevel gear 441 at the end of the drivingnut 44, so that when thefirst control part 41 rotates in a certain direction, the drivenscrew 42 is driven to push forward, and thesecond box 43 and theoutput gear 3 installed therein move from one end of the frequency-selecting phase adjusting unit B1 to the end of the frequency-selecting phase adjusting unit B2. When theoutput gear 3 reaches thefirst linkage gear 111 of the frequency-selecting phase modulation unit B2 and engages with only thefirst linkage gear 111, the rotation of thefirst control part 41 is stopped.

After theoutput gear 3 is engaged with thefirst linkage gear 111, thesecond control portion 51 is rotated, and thebevel gear 510 at the end of thesecond control portion 51 is engaged with thebevel gear 520 at one end of thetransmission shaft 52, so that when thesecond control portion 51 rotates in a certain direction, thetransmission shaft 52 is driven, and thetransmission shaft 52 simultaneously drives theoutput gear 3 to move in the same direction. At this stage, the phase-shiftingtransmission mechanism 21 is in the second state, thefirst transmission gear 111 receives an external rotation torque alone to drive thetransmission screw 113 to rotate circumferentially, and correspondingly drives thetransmission nut 114 to perform linear motion along theguide rod 121 and theslide rod 112 until thetransmission nut 114 moves to the position of the targetphasing control member 21, and at this time, thesecond control portion 51 stops rotating, so that thetransmission nut 114 stays at the position of the targetphasing control member 21.

The phasing control corresponding to the position where thedrive nut 114 is located is the selected phasing control. In the present embodiment, as shown in fig. 17 and 18, each of thephasing control members 2 is fixedly locked by anelastic buckle 40 in the fixingmember 4, so that the phasing control member cannot rotate freely when not selected. As shown in fig. 19, atop member 116 is further disposed on the side of thefirst box 115 for installing thetransmission nut 114, when thetransmission nut 114 moves to the position of the targetphasing control member 21, thetop member 116 jacks up the fixingmember 4 of thephasing control member 21, and thespring catch 40 of the fixingmember 4 releases the targetphasing control member 21, so that the targetphasing control member 21 is in a movable state. Therefore, the phasing control member selected by the drivingnut 114 is in a movable state, and the phasing control member which is not selected is stuck by thefixed part 4 and cannot be moved.

After the targetphasing control member 21 is selected, thefirst control part 41 is rotated again, and theoutput gear 3 continues to move forward until theoutput gear 3 is simultaneously engaged with thefirst linkage gear 111 and thesecond linkage gear 123, as shown in fig. 20, at this time, the rotation of thefirst control part 41 is stopped.

Next, thesecond control portion 51 is rotated again, theoutput gear 3 is driven to drive thefirst linkage gear 111 and thesecond linkage gear 123 at the same time, at this stage, the phase-shiftingtransmission mechanism 21 is in the first state, thefirst linkage gear 111 and thesecond linkage gear 123 receive the same rotation torque to synchronously rotate, and theexternal gear 1141 on thetransmission nut 114 is correspondingly driven to perform circumferential rotation, that is, to rotate in situ at the position of the target phase-shiftingcontrol member 21. Because the side-by-side racks 20 of the targetphasing control member 21 are meshed with theexternal gear 1141 of thetransmission nut 114, when thetransmission nut 114 rotates in situ, the displacement of the movement of the targetphasing control member 2 can be controlled, and the phase shift of a certain frequency band signal of the antenna controlled by the target phasing control member is correspondingly completed.

After the displacement of the targetphasing control member 21 is completed, thesecond control part 51 is stopped to complete the corresponding phase shifting operation of the targetphasing control member 21.

After finishing the phase modulation work, if needing to control other phasemodulation control elements 2 to modulate phase, the switching control mechanism A controls the output gear to switch between a first state of simultaneously engaging the first linkage gear and the second linkage gear of the two frequency-selecting phase modulation units B and a second state of separately engaging the first linkage gear, so as to achieve the purpose of controlling the phasemodulation control elements 2 to perform phase modulation after thetransmission nut 114 is moved to the position of different target phasemodulation control elements 2.

Therefore, the frequency-selective phasing device provided by the embodiment can provide thefirst control part 41 through designing the straight-movingmechanism 4 to control theoutput gear 3 to slide along the axial direction so as to engage with the corresponding linkage gear of any one frequency-selective phasing unit to switch different states. If the phase is switched between a first state of simultaneously engaging thefirst interlocking gear 111 and thesecond interlocking gear 123 and a second state of individually engaging thefirst interlocking gear 111, thesecond control part 51 is combined to control the frequency-selecting phase modulation device to select a target phase modulation control element in the second state, and phase modulation is performed in the first state. Therefore, the purpose that the phase shift of a plurality of phase shift control elements can be controlled by controlling two control parts by using the frequency-selecting phase modulation device is achieved.

In this embodiment, two rows of phasingcontrol members 2 are disposed in one frequency-selecting phasing unit B, and thephasing control members 2 in the upper and lower rows are arranged in a staggered manner, so that thetransmission nut 114 is only aligned with one phasing control member in one position. With reference to one embodiment shown in fig. 1, a total of twenty phase modulation controls 2 are provided for two frequency-selective phase modulation units B. This is only one embodiment, and in other embodiments, the number of the phasemodulation control elements 2 may be set according to specific requirements of a product, and the number of the phase modulation control elements may be expanded, so as to control the phase shift of more antenna frequency bands, and may also be reduced, so as to adapt to a corresponding product, which is not limited in the present invention.

In another embodiment, the switching control mechanism of the present invention may work in conjunction with a single frequency-selective phase modulation unit, or with three, four, or more such frequency-selective phase modulation units, and it is critical that the linear stroke of the output gear in the switching control mechanism is long enough to engage the linked gears of different sets of frequency-selective phase modulation units at different axial positions. Therefore, those skilled in the art can flexibly change different embodiments according to the spirit of the present invention, which is not repeated herein.

The invention also provides a multi-frequency antenna, which comprises a phase modulation switching control mechanism and a plurality of phase-shifting parts corresponding to a plurality of frequency bands, wherein each phase-shifting part is provided with a corresponding phase modulation control part in the frequency-selecting phase-modulating unit and is in linkage arrangement with the phase modulation control part.

In conclusion, the phase modulation control method and the phase modulation control device optimize the relevant mechanism structure required by phase modulation, and can more stably and more simply realize the phase modulation control of any frequency band signal in the multi-frequency antenna.

The foregoing description is only exemplary of the preferred embodiments of the invention and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the invention according to the present invention is not limited to the specific combination of the above-mentioned features, but also encompasses other embodiments in which any combination of the above-mentioned features or their equivalents is possible without departing from the scope of the invention as defined by the appended claims. For example, the above features and (but not limited to) features having similar functions of the present invention are mutually replaced to form the technical solution.

Claims (13)

1. The utility model provides a phase modulation is with switching control mechanism which characterized in that:

the switching control mechanism comprises an output gear, a straight-moving mechanism and a turnover mechanism;

the straight-moving mechanism is used for controlling the output gear to be switched among a plurality of positions in the axial direction of the output gear, so that the output gear is connected with any one of the frequency-selecting phase modulation units at two positions;

the epicyclic mechanism is used for controlling the circumferential rotation of the output gear;

for each connected frequency-selecting phase modulation unit, at the first position of the two positions, the output gear is linked with a transmission nut in the frequency-selecting phase modulation unit to linearly operate and is suitable for any one of a plurality of phase modulation control pieces which are linearly arranged in an aligned mode by the external gear; at the second position, the output gear is linked with the transmission nut to rotate circumferentially so as to be suitable for controlling the aligned phase modulation control element to implement phase shift by using the outer gear thereof;

the two frequency-selecting phase modulation units are respectively arranged on two axial sides of the output gear, when the output gear is positioned at the first position, only the first linkage gears of the corresponding frequency-selecting phase modulation units are meshed, and the first linkage gears are linked with the transmission nuts to linearly run so as to realize the alignment by the external gears; when the output gear is at the second position, the first linkage gear and the second linkage gear of the corresponding frequency-selecting phase-modulating unit are simultaneously meshed, so that the first linkage gear and the second linkage gear jointly act to drive the transmission nut to rotate circumferentially and perform phase shifting by the outer gear of the transmission nut.

2. A switching control mechanism for phase modulation according to claim 1, characterized in that: the straight-moving mechanism is used for controlling a box body covering the output gear to move linearly so as to drive the output gear to move linearly along the axial direction, and therefore switching of the output gear among a plurality of positions is achieved.

3. A phase modulation switching control mechanism according to claim 2, characterized in that: the straight-moving mechanism comprises a first control part capable of rotating circumferentially, a driven screw, a driving nut, a box body provided with the output gear, and a sliding rod supporting the box body to slide, wherein a bevel gear is arranged at the tail end of the first control part and is meshed and connected with the bevel gear formed on the driving nut, the driving nut is screwed with the driven screw, and the driven screw is fixedly arranged with the box body so as to be driven by the rotation of the driving nut which is relatively fixed, and the output gear is linked to slide on the sliding rod along with the box body.

4. A switching control mechanism for phase modulation according to claim 3, characterized in that: but turnover mechanism includes circumferential direction's second control part and transmission shaft, the end of second control part is equipped with the bevel gear, with the bevel gear of transmission shaft one end meshes mutually and is connected, the transmission shaft has the cross-section and is polygonal transmission portion, and this transmission portion end passes cross-sectional shape matched with shaft hole on the output gear, with the coaxial setting of driven screw rod of craspedodrome mechanism to transmit moment for through the transmission shaft through the circumferential direction of second control part output gear makes circumferential direction.

5. Switching control mechanism for phase modulation according to claim 4, characterized in that: and one end of the driven screw rod opposite to the transmission shaft is provided with an accommodating cavity for accommodating the transmission part of the transmission shaft when the output gear slides.

6. A phase modulation switching control mechanism according to claim 1, characterized in that: in each frequency-selecting phase modulation unit, the first linkage gear and the second linkage gear are coaxially arranged side by side and have the same specification of meshing gear configuration.

7. A phase modulation switching control mechanism according to any one of claims 1 to 5, characterized in that: the frequency-selecting phase modulation unit comprises a phase-shifting transmission mechanism and a plurality of phase modulation control elements, wherein each phase modulation control element is used for controlling a signal corresponding to a frequency band in the antenna to implement phase modulation;

the phase-shifting transmission mechanism comprises a bracket, a screw and nut transmission mechanism and a guide mechanism;

the screw and nut transmission mechanism comprises a first transmission gear, a guide slide bar, a transmission screw and a transmission nut, wherein the transmission screw and the transmission nut are mutually screwed;

the guide mechanism comprises a plurality of guide rods, shaft sleeves and second linkage gears, each guide rod is circumferentially distributed, two ends of each guide rod are respectively connected with the shaft sleeves, and the second linkage gears are sleeved on one of the shaft sleeves;

the guide mechanism is sleeved on the transmission screw rod through a shaft sleeve, so that the second linkage gear and the first linkage gear are arranged side by side, and each guide rod of the guide mechanism correspondingly penetrates through the plurality of through holes in the transmission nut;

and an external gear is formed on the periphery of the transmission nut and is used for being meshed with any one phase modulation control piece.

8. Switching control mechanism for phase modulation according to claim 7, characterized in that: the first linkage gear receives the rotating torque of the output gear to drive the transmission screw to rotate circumferentially, and correspondingly drives the transmission nut to perform linear motion along the guide rod and the sliding rod.

9. A phase modulation switching control mechanism according to claim 8, characterized in that: the first linkage gear and the second linkage gear simultaneously receive the same rotating torque of the output gear to synchronously rotate, and correspondingly drive the outer gear on the transmission nut to rotate in the circumferential direction.

10. A switching control mechanism for phase modulation according to claim 7, characterized in that: the phase modulation control elements are divided into two rows which are parallel to each other and are arranged side by side in a staggered mode on two axial sides of the transmission screw rod.

11. Switching control mechanism for phase modulation according to claim 7, characterized in that: the phase modulation control part is a rack and is used for forming a gear and rack transmission mechanism with the outer gear.

12. Switching control mechanism for phase modulation according to claim 7, characterized in that: the section of a guide rod of the guide mechanism is trapezoidal.

13. A multi-frequency antenna comprising a plurality of phase shifting elements corresponding to a plurality of frequency bands, characterized in that it comprises a phase modulating switching control mechanism according to any one of claims 1 to 12.

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