CN111786117A - Feed source and antenna device - Google Patents

Abstract

The invention discloses a feed source and an antenna device, which relate to the technical field of communication, and the method comprises the following steps: the horn antenna of a plurality of array settings, wherein, every the horn antenna include the waveguide pipe and with the tubaeform waveguide mouth that one end of waveguide pipe is connected. The invention has the beneficial effects that: the space power synthesis of multi-path high-power signals can be realized through the horn antennas arranged in a plurality of arrays, and the effect of high-gain and high-directivity wave beams is achieved.

Description

Feed source and antenna device

Technical Field

The invention belongs to the technical field of communication, and particularly relates to a feed source and an antenna device.

Background

In electronic devices such as radar, communication, measurement and control, countermeasure and the like, power synthesis problems often occur. The transmission power can be improved and the detection and action distance can be increased through power synthesis. In the context of high power, the power of the existing single antenna device is difficult to withstand too high peak power due to physical mechanism and manufacturing process limitations. Therefore, it is necessary to design a suitable antenna device to realize high power combining of electromagnetic signals.

Disclosure of Invention

The invention provides a feed source and an antenna device based on the technical problem that the power of the conventional antenna device is difficult to bear overhigh peak power due to the limitation of physical mechanism and manufacturing process.

In a first aspect, an embodiment of the present invention provides a feed source, including:

the horn antenna of a plurality of array settings, wherein, every the horn antenna include the waveguide pipe and with the tubaeform waveguide mouth that one end of waveguide pipe is connected.

Optionally, the feed source further includes a side waveguide, the side waveguide is disposed on a sidewall of a waveguide tube of one of the feedhorns, a coupling window is disposed at a connection between the side waveguide and the waveguide tube, and the coupling window is used for coupling an electromagnetic signal received by the waveguide tube of the feedhorn into the side waveguide;

an impedance transformation section is arranged on the inner wall of one end of the waveguide tube close to the horn-shaped waveguide port.

Optionally, the impedance transformation section is a step matching block.

Optionally, the number of the horn antennas is 4, and the horn antennas are arranged in a rectangular array.

Optionally, the flared waveguide port has a square cross-section.

Optionally, each of the horn antennas is provided with a choke ring at a connection between a waveguide thereof and the horn waveguide port, and the choke ring is used for correcting the direction of the electromagnetic signal.

Alternatively, a plurality of the horn antennas may be integrally molded by aluminum die casting.

Optionally, each of the feedhorns is formed by a sheet metal part.

In a second aspect, an embodiment of the present invention provides an antenna apparatus, including the feed source according to any one of the above embodiments, where a side waveguide of the feed source is connected to a signal receiving component of the antenna apparatus, and one end of a waveguide of each of the horn antennas of the feed source, which is far away from a horn waveguide port, is connected to a signal transmitting component.

Optionally, the method further comprises:

and the anti-transmitting filter is arranged on the side waveguide, and an output port of the anti-transmitting filter is connected with an input port of the signal receiving component.

In the feed source and the antenna device provided by the embodiment of the invention, a plurality of horn antennas are arranged in an array manner, wherein each horn antenna comprises a waveguide tube and a horn-shaped waveguide port connected with one end of the waveguide tube. Therefore, the feed source and the antenna device provided by the invention can realize the space power synthesis of multi-path high-power signals through the feed source formed by the plurality of horn antenna arrays, and have the effects of high gain, high directional beam and receiving and transmitting sharing.

Drawings

The scope of the present disclosure may be better understood by reading the following detailed description of exemplary embodiments in conjunction with the accompanying drawings. Wherein the included drawings are:

fig. 1 shows a schematic structural diagram of a feed source proposed by the present invention;

fig. 2 shows a perspective view of a feed provided with a side waveguide proposed by the invention;

fig. 3 shows a cross-sectional view of a feedhorn provided with side waveguides as proposed by the present invention;

fig. 4 shows a simulation diagram of the electromagnetic signal synthesis of the feed proposed by the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following will describe in detail an implementation method of the present invention with reference to the accompanying drawings and embodiments, so that how to apply technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

Example one

Fig. 1 shows a schematic structural diagram of a feed source provided by the present invention, and as shown in fig. 1, thefeed source 1 includes a plurality of horn antennas arranged in an array, each of the horn antennas includes awaveguide 12 and a horn-shaped waveguide port 11 connected to one end of thewaveguide 12.

Here, the horn antenna is a microwave antenna having a circular or square cross section which is gradually opened from the end of thewaveguide 12, and includes awaveguide 12 portion and a horn-shaped waveguide port 11.

The number of the horn antennas is 4, and the horn antennas are arranged in a rectangular array.

For example, thefeed source 1 includes a first horn antenna, a second horn antenna, a third horn antenna and a fourth horn antenna, and the first horn antenna, the second horn antenna, the third horn antenna and the fourth horn antenna are arranged in a rectangular array.

Here, if a single horn antenna is used as thefeed source 1, the power design difficulty and cost required for the single horn antenna may be greatly increased; if the double-path feed source 1 formed by two horn antennas is adopted, the double-path feed source 1 can form an elliptical wave beam, the design requirement on the reflecting surface of an antenna device is high, and the overall efficiency of the system is influenced. When the number of the horn antennas is larger than 6, the primary wave beams formed by thefeed source 1 are compressed more, which is not beneficial to the design of the reflecting surface. Meanwhile, the difficulty of structure and reliability design is brought by the increase of the number of the horn antennas, and the integral cost ratio is not high. Therefore, thefeed source 1 formed by 4 horn antenna array settings is adopted as the optimal implementation mode in consideration of the power of the signal transmitting assembly and the performance of the antenna feed system.

It should be noted that although thefeed 1 formed by 4 feedhorns in an array is used as the best mode of the present invention, thefeed 1 formed by two or more feedhorns is still within the protection scope of the present invention.

In an alternative embodiment, theflared waveguide port 11 has a square cross-section.

Here, when the horn antenna having a square cross section is used, the effect of the horn antenna having a square cross section in transmitting and receiving orthogonal linear polarization is the same as that of thefeed source 1 formed of the horn antenna having a circular cross section because the sides of the square are the same. Therefore, thefeed source 1 can receive two orthogonal polarization signals by adopting the horn antenna with the square cross section, and the horn antenna with the square cross section is easier to arrange when a high-power array is formed. In addition, thefeed source 1 can realize the space power synthesis of four paths of high-power signals, and high-gain and high-directivity wave beams and the sharing of receiving and transmitting are realized.

It should be noted that, as an optimal solution, a horn antenna with a square cross section may also be used, and a horn antenna with a circular or rectangular cross section may also be used.

In an alternative embodiment, fig. 2 shows a perspective view of a feed provided with a side waveguide according to the present invention, fig. 3 shows a cross-sectional view of a horn antenna provided with a side waveguide according to the present invention, as shown in fig. 2 and fig. 3, thefeed 1 further includes aside waveguide 13, theside waveguide 13 is disposed on a sidewall of awaveguide 12 of one of the horn antennas, acoupling window 14 is disposed at a connection between theside waveguide 13 and thewaveguide 12, thecoupling window 14 is used for coupling an electromagnetic signal received by thewaveguide 12 of the horn antenna into theside waveguide 13, and animpedance transformation section 15 is disposed on an inner wall of one end of thewaveguide 12 close to thehorn waveguide port 11.

Wherein theimpedance transformation section 15 is a step-shaped matching block.

Here, thehorn waveguide port 11 of each horn antenna is used as an inlet and an outlet of an electromagnetic signal, and is a receiving and transmitting common port of an antenna feed system; one end of thewaveguide tube 12 of each horn antenna, which is far away from the horn-shaped waveguide port 11, is used as an emission port of the antenna feed system and is connected with a signal emission assembly, so that electromagnetic signals emitted by the signal emission assembly are fed into the choke ring and then are transmitted into space through the horn-shaped waveguide port 11; the end of theside waveguide 13 remote from thecoupling window 14 serves as a receiving port for the antenna feed system.

It should be noted that the position of theside waveguide 13 is not located on the array plane of the array of the plurality of horn antennas, and the size of the stepped matching block, the position and the size of the coupling hole may be designed according to actual conditions.

Theside waveguide 13, thewaveguide 12 where theside waveguide 13 is located, theimpedance conversion section 15, and thecoupling window 14 actually form an orthogonal mode coupler, one end of theside waveguide 13 away from thecoupling window 14 serves as a side port of the orthogonal mode coupler, one end of thewaveguide 12 away from theflared waveguide port 11 serves as a common port of the orthogonal mode coupler, and the other end serves as a through port of the orthogonal mode coupler. Wherein, the electromagnetic wave entering from the public port reaches the through port through impedance transformation of the step-shaped matching block transition to obtain a polarization; at the same time, the electromagnetic wave enters theside waveguide 13 through thecoupling window 14, and another orthogonal polarization is obtained. The common port transmits orthogonal TE10 and TE01 modes in the square waveguide, and the through port and the side port transmit mutually orthogonal TE10 modes respectively and are coupled out of a specific mode and a specific frequency.

This allows the horn antenna to have a common transmitting and receiving effect by theside waveguide 13.

In an alternative embodiment, a plurality of the horn antennas are integrally molded by aluminum die casting.

Here, a plurality of horn antennas can guarantee the phase uniformity of a plurality of horn antennas through the integrated molding technique, avoids the phase error because of the machining error brings. Namely, the first horn antenna, the second horn antenna, the third horn antenna and the fourth horn antenna form a four-way feed source 1 by an integrated molding technology.

It should be noted that, as another embodiment, the plurality of horn antennas may be independent bodies each formed by using one sheet metal member.

In an alternative embodiment, each of the horn antennas is provided with a choke ring at the junction of itswaveguide 12 and theflared waveguide port 11, and the choke ring is used for correcting the direction of the electromagnetic signal. .

Here, the electromagnetic wave is fed into the choke ring through thewaveguide 12 and is emitted into the space through thebell mouth 11. The choke loop functions to modify the directivity pattern of the electromagnetic signal and to match the impedance to reduce echo reflections.

Fig. 4 shows a simulation schematic diagram of electromagnetic signal synthesis of a feed source, as shown in fig. 4, the gain of thefeed source 1 formed by 4 horn antenna arrays is 15dBi, and it can be seen that thefeed source 1 provided by the present invention meets the design requirement of a subreflector. It can be seen that thefeed source 1 provided by the invention can better realize the synthesis of a directional diagram under the condition of ensuring low standing wave.

Example two

The invention also provides an antenna device, which comprises the feed source in any one of the embodiments, wherein the side waveguide of the feed source is connected with the signal receiving component of the antenna device, and one end, far away from the horn-shaped waveguide port, of the waveguide tube of each horn antenna of the feed source is connected with a signal transmitting component.

Here, each horn antenna is connected with a signal transmitting component, and multiple paths of electromagnetic signals can be subjected to power synthesis in space through the feed source.

In an alternative embodiment, an impedance filter is disposed on the side waveguide, and an output port of the impedance filter is connected to an input port of the signal receiving component.

The antenna device also comprises a main reflecting surface and an auxiliary reflecting surface, wherein the auxiliary reflecting surface and the main reflecting surface are designed and processed and spatially combined strictly according to the classical double-reflecting-surface theory, so that the whole receiving and transmitting shared four-path spatial power synthesis double-reflecting-surface antenna device is formed. Because the space power synthesis is adopted, the external space reflection is small, the loss is small, the synthesis efficiency is high, the number of devices is reduced, and the method has obvious advantages compared with the traditional waveguide internal synthesis. Furthermore, the space power synthesis of four paths of high-power signals can be realized through the feed source, and high-gain and high-directivity beams can be shared by transmitting and receiving.

The technical solution of the present invention is described in detail above with reference to the accompanying drawings, and it is considered that in the related art, the power of the existing antenna device is hard to withstand too high peak power due to the limitations of the physical mechanism and the manufacturing process. The invention provides a feed source and an antenna device, which can realize the space power synthesis of multi-path high-power signals through the feed source comprising a plurality of horn antennas and have the effects of high gain, high directional wave beams and receiving and transmitting sharing.

Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A feed, comprising:

the horn antenna of a plurality of array settings, wherein, every the horn antenna include the waveguide pipe and with the tubaeform waveguide mouth that one end of waveguide pipe is connected.

2. The feed source of claim 1, further comprising a side waveguide, wherein the side waveguide is disposed on a sidewall of a waveguide tube of one of the horn antennas, a coupling window is disposed at a connection position of the side waveguide and the waveguide tube, and the coupling window is configured to couple an electromagnetic signal received by the waveguide tube of the horn antenna into the side waveguide;

an impedance transformation section is arranged on the inner wall of one end of the waveguide tube close to the horn-shaped waveguide port.

3. The feed of claim 2, wherein the impedance transformation segment is a ladder matching block.

4. The feed of claim 1, wherein the number of the horn antennas is 4, and the horn antennas are arranged in a rectangular array.

5. The feed of claim 2, wherein the flared waveguide port is square in cross-section.

6. The feed source as claimed in claim 1, wherein each horn antenna is provided with a choke ring at the junction of its waveguide and the horn waveguide opening, the choke ring being used to modify the direction of the electromagnetic signal.

7. The feed of claim 1, wherein the plurality of feedhorns are integrally formed by aluminum die casting.

8. The feed of claim 1, wherein each of the feedhorns is formed from a sheet metal part.

9. An antenna device, characterized in that the antenna device comprises the feed source as claimed in any one of claims 1 to 8, the side waveguide of the feed source is connected with the signal receiving component of the antenna device, and one signal transmitting component is connected with one end of the waveguide tube of each horn antenna of the feed source, which is far away from the horn-shaped waveguide port.

10. The antenna device of claim 9, further comprising:

and the anti-transmitting filter is arranged on the side waveguide, and an output port of the anti-transmitting filter is connected with an input port of the signal receiving component.

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