CN111816979B - Surface wave exciters and communication systems - Google Patents
Surface wave exciters and communication systemsDownload PDFInfo
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- CN111816979B CN111816979BCN201910284001.6ACN201910284001ACN111816979BCN 111816979 BCN111816979 BCN 111816979BCN 201910284001 ACN201910284001 ACN 201910284001ACN 111816979 BCN111816979 BCN 111816979B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
- H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
- H04B5/28—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium using the near field of leaky cables, e.g. of leaky coaxial cables
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Abstract
Translated fromChinese
Description
Technical Field
The embodiment of the application relates to the wireless communication technology, in particular to a surface wave exciter and a communication system.
Background
With the rapid development of communication technology, various emerging services are emerging continuously, and the demand of bandwidth is increasing continuously. In order to meet the demand of users for bandwidth, surface wave communication is proposed. Surface wave communication has transmission characteristics of high bandwidth and low attenuation. The method of communication by the transmission surface wave is a communication method with a large bandwidth and low cost.
Surface wave communications generally include a surface wave exciter disposed on a utility pole and a surface wave is transmitted by an existing power transmission cable. Among them, since the power transmission cable is generally a high-voltage transmission line, there is a safety hazard in the installation process of the surface wave exciter.
Disclosure of Invention
The embodiment of the application provides a surface wave exciter and a communication system, so that the safety in the installation process is improved.
In a first aspect, embodiments of the present application provide a surface wave exciter. The surface wave exciter includes: the antenna comprises a first excitation body, a second excitation body, a radiation antenna and a coaxial feed. The first excitation body and the second excitation body are clamped with each other, a through hole is formed between the first excitation body and the second excitation body which are clamped with each other, the through hole is used for arranging a transmission line, and the transmission line is insulated from the first excitation body and the second excitation body. One end of the radiation antenna is connected with the second excitation body, and the other end of the radiation antenna is connected with the coaxial feed. A gap exists between the radiating antenna and the transmission line.
This first aspect provides a non-contact surface wave exciter that is safe to install. The surface wave exciter is used for realizing surface wave communication, and the surface wave communication has the transmission characteristics of high bandwidth and low attenuation, so that the communication transmission rate and the transmission reliability can be improved.
In one possible design, the first excitation body is symmetrical to the second excitation body.
In this design, the first excitation body and the second excitation body that are symmetrically arranged can facilitate mounting of the surface wave exciter on the transmission line.
In one possible design, the center axes of the first and second excitation bodies engaged with each other coincide with the center axis of the transmission line.
In one possible design, the first excitation body includes a first fixed part and a first surface wave excitation part connected to each other; the second excitation body includes a second fixed part and a second surface wave excitation part connected to each other; the first fixing part and the second fixing part are mutually clamped, and the first excitation body and the second excitation body are fixed on the transmission line; the first surface wave excitation portion and the second surface wave excitation portion are matched to form an excitation cavity.
In this design, can adopt the mode of lock from top to bottom to install surface wave exciter on the transmission line to realize the swift installation of surface wave exciter.
In one possible embodiment, the first surface wave excitation unit includes a first transverse electromagnetic excitation unit and a first transverse magnetic excitation unit connected to each other; the second surface wave excitation unit includes a second transverse electromagnetic excitation unit and a second transverse magnetic excitation unit connected to each other; the first transverse electromagnetic excitation part and the second transverse electromagnetic excitation part are matched to form a cylindrical cavity; the first transverse magnetic excitation part and the second transverse magnetic excitation part are matched to form a conical cavity; the diameter of the cylindrical cavity is smaller than the maximum diameter of the conical cavity.
In this design, through the cylindrical cavity that first transverse electromagnetic excitation portion and second transverse electromagnetic excitation portion match and form, first transverse magnetic excitation portion matches with second transverse magnetic excitation portion and forms conical cavity, realizes the surface wave conversion of electromagnetic wave to TM mode, can promote communication transmission rate and transmission reliability.
In one possible design, the surface wave exciter further includes an insulating portion that is provided between the transmission line and the first and second fixing portions.
In one possible design, the radiation antenna is a cone antenna, a bottom surface of the cone antenna is connected with the second excitation body, and a top portion of the cone antenna is connected with the coaxial feed.
In one possible design, the bottom surface of the cone antenna is curved.
In one possible design, the edges of the bottom surface of the cone antenna are rounded.
In one possible design, the surface wave exciter further comprises a dielectric sleeve, and the dielectric sleeve is sleeved outside the radiation antenna.
In one possible design, the radiating antenna is configured to convert an electrical signal received from the coaxial feed into an electromagnetic wave and radiate the electromagnetic wave onto the transmission line, and the first and second excitation bodies are configured to convert the electromagnetic wave into a surface wave that is transmitted along the transmission line; or the first excitation body and the second excitation body are configured to convert a received surface wave into an electromagnetic wave, the radiation antenna is configured to receive the electromagnetic wave, convert the electromagnetic wave into an electrical signal, and transmit the electrical signal to the coaxial feed, and the surface wave is transmitted along the transmission line.
In the design, the receiving and sending of signals can be realized, so that the communication is realized by utilizing the surface waves, and the communication transmission rate and the transmission reliability are improved.
In a second aspect, embodiments of the present application provide a communications system comprising a base station, a radio unit and at least one surface wave exciter according to any of the first aspect, the surface wave exciter being arranged on a power transmission line.
The utility model provides a surface wave exciter and communication system, this surface wave exciter includes first excitation body, the second excites the body, radiating antenna and coaxial feed, first excitation body and the mutual block of second excitation body, be formed with the through-hole between the first excitation body of mutual block and the second excitation body, the through-hole is used for setting up the transmission line, the transmission line is insulating with first excitation body and second excitation body, radiating antenna's one end and second excitation body coupling, the other end is connected with coaxial feed, there is the clearance between radiating antenna and the transmission line, thereby realize a non-contact surface wave exciter, this surface wave exciter's installation is safe. The surface wave exciter of the embodiment of the application realizes surface wave communication, and the surface wave communication has the transmission characteristics of high bandwidth and low attenuation, so that the communication transmission rate and the transmission reliability can be improved.
Drawings
Fig. 1 is a schematic diagram of an application scenario according to an embodiment of the present application;
FIG. 2 is a schematic illustration of a split configuration of a surface wave exciter according to an embodiment of the present application;
FIG. 3 is a schematic illustration of another surface wave exciter according to an embodiment of the present application in a disassembled configuration;
FIG. 4 is a schematic illustration of a disassembled structure of another surface wave exciter in accordance with an embodiment of the present application;
FIG. 5 is a schematic structural diagram of another surface wave exciter in accordance with an embodiment of the present application;
FIG. 6 is a schematic diagram of a partial structure of a radiating antenna of another surface wave exciter in accordance with an embodiment of the present application;
FIG. 7 is a schematic diagram of the communication of two surface wave exciters of an embodiment of the present application.
Detailed Description
Fig. 1 is a schematic view of an application scenario of an embodiment of the present invention, and as shown in fig. 1, a surface wave exciter (11, 12) of the embodiment of the present invention may be disposed on a utility pole 2, and a surface wave is transmitted by using an electric power transmission line to realize communication. For example, the surface wave exciter is connected to a transceiver (not shown) on which an antenna (not shown) is provided. A terminal device (not shown) transmits a wireless electromagnetic wave, the antenna receives the wireless electromagnetic wave transmitted by the terminal device, the antenna converts the wireless electromagnetic wave into an electrical signal and transmits the electrical signal to a transceiver, the transceiver transmits the electrical signal to a surface wave exciter 12 of the embodiment of the present application, the surface wave exciter 12 transmits a surface wave to a surface wave exciter 11 by using an electricpower transmission line 3, the surface wave exciter 11 receives a surface wave and converts the surface wave into an electrical signal and transmits the electrical signal to a radio unit 4, and the radio unit 4 transmits the electrical signal to a base station 5, so that uplink transmission can be achieved.
In the same principle, in the process of implementing downlink transmission, the base station 5 sends an electrical signal carrying downlink information to the radio unit 4, the radio unit 4 transmits the electrical signal to the surface wave exciter 11 of the embodiment of the present application, the surface wave exciter 11 transmits a surface wave to the surface wave exciter 12 by using thepower transmission line 3, and thesurface wave exciter 12 sends a radio magnetic wave carrying downlink information to the terminal device through a transceiver and an antenna connected with the surface wave exciter 12.
Therefore, the surface wave exciter can be used for realizing surface wave communication, and the surface wave communication has the transmission characteristics of high bandwidth and low attenuation, so that the communication transmission rate and the transmission reliability can be improved.
The surface wave exciter of the embodiment of the application can be conveniently and safely installed on the power transmission line under the condition that the existing power transmission line is not changed. The specific structure of the surface wave exciter of the embodiment of the present application can be referred to the specific explanation of the embodiment described below.
The application relates to a terminal device: which may be wireless or wireline, and which may be a device providing voice and/or other traffic data connectivity to a user, a handheld device having wireless connection capability, or other processing device connected to a wireless modem. Wireless terminals, which may be mobile terminals such as mobile telephones (or "cellular" telephones) and computers having mobile terminals, such as portable, pocket, hand-held, computer-included, or vehicle-mounted mobile devices, may communicate with one or more core networks via a Radio Access Network (RAN), which may exchange language and/or data with the RAN. Examples of such devices include Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, and Personal Digital Assistants (PDAs). A wireless Terminal may also be referred to as a system, a Subscriber Unit (Subscriber Unit), a Subscriber Station (Subscriber Station), a Mobile Station (Mobile), a Remote Station (Remote Station), a Remote Terminal (Remote Terminal), an Access Terminal (Access Terminal), a User Terminal (User Terminal), a User Agent (User Agent), and a User Device or User Equipment (User Equipment), which are not limited herein.
In the present application, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
Fig. 2 is a schematic view of a split structure of a surface wave exciter according to an embodiment of the present invention, and as shown in fig. 2, the surface wave exciter 100 according to this embodiment may include: afirst excitation body 101, asecond excitation body 102, aradiating antenna 103 and acoaxial feed 104.
The first andsecond excitation bodies second excitation bodies second excitation bodies
Theradiating antenna 103 is connected at one end to thesecond excitation body 102 and at the other end to thecoaxial feed 104. A gap exists between theradiating antenna 103 and the transmission line.
It can be seen that the surface wave exciter 100 of the present embodiment is divided into two parts, namely, a firstexciting body 101 and a secondexciting body 102. The surface wave exciter 100 of the present embodiment can be conveniently located on an already deployed infrastructure. For example, when the surface wave exciter 100 is mounted, the first and secondexciting bodies exciting bodies exciting bodies second excitation bodies
Since there is a gap between theradiation antenna 103 of the surface wave exciter 100 and the transmission line, the surface wave exciter 100 of the embodiment of the present application is a non-contact surface wave exciter, theradiation antenna 103 can radiate electromagnetic waves to the transmission line or receive electromagnetic waves from the transmission line, and the size of the gap can be set as required. The non-contact surface wave exciter of the embodiment of the application can also improve the safety in the installation process.
It is understood that the surface wave exciter may be fixed to the utility pole by any other fixing structure for reducing the load of the transmission line, and the fixing structure may be any structure having a fixing function, which is not necessarily exemplified in the embodiments of the present invention.
In some embodiments, the first andsecond actuating bodies first excitation body 101 and thesecond excitation body 102 are vertically symmetrical, and the vertical direction refers to the vertical direction of the transmission line on which the surface wave exciter is mounted, and fig. 1 illustrates an example in which thefirst excitation body 101 and thesecond excitation body 102 of the surface wave exciter shown in fig. 1 are vertically symmetrical. For another example, thefirst excitation body 101 and thesecond excitation body 102 are symmetrical to each other, and can be flexibly configured according to the requirement.
In some embodiments, to improve the reliability of the surface wave transmission, the center axes of the first andsecond excitation bodies
In an implementation, theradiation antenna 103 may be a probe antenna, which functions to radiate electromagnetic waves or receive electromagnetic waves.
The surface wave exciter of this embodiment includes first excitation body, the second excitation body, radiating antenna and coaxial feed, the mutual block of first excitation body and second excitation body, be formed with the through-hole between the first excitation body of mutual block and the second excitation body, the through-hole is used for setting up the transmission line, the transmission line is insulating with first excitation body and second excitation body, radiating antenna's one end and second excitation body coupling, the other end is connected with coaxial feed, there is the clearance between radiating antenna and the transmission line, thereby realize a non-contact surface wave exciter, this surface wave exciter's installation safety. The surface wave exciter of the embodiment of the application realizes surface wave communication, and the surface wave communication has the transmission characteristics of high bandwidth and low attenuation, so that the communication transmission rate and the transmission reliability can be improved.
Fig. 3 is a schematic diagram illustrating a split structure of another surface wave exciter according to an embodiment of the present invention, and as shown in fig. 3, in the apparatus according to the present embodiment, based on the apparatus structure shown in fig. 2, thefirst excitation body 101 may include a first fixedportion 1011 and a first surfacewave excitation portion 1012 connected to each other, and thesecond excitation body 102 may include a second fixedportion 1021 and a second surfacewave excitation portion 1022 connected to each other.
Thefirst fixing portion 1011 and thesecond fixing portion 1021 are engaged with each other to fix thefirst excitation body 101 and thesecond excitation body 102 to the transmission line, and the first surfacewave excitation unit 1012 and the second surfacewave excitation unit 1022 are matched to form theexcitation cavity 110.
Theexcitation cavity 110 has an opening facing the propagation direction of the surface wave. For example, the excitation cavities of two surface wave exciters have opposing openings, wherein one surface wave exciter can transmit surface waves to the other surface wave exciter and can also receive surface waves transmitted from the other surface wave exciter.
Thefirst fixing portion 1011 and thesecond fixing portion 1021 are engaged with each other to form a through hole in the above embodiment, so that the surface wave exciter can be mounted on the transmission line. Thefirst fixing portion 1011 and thesecond fixing portion 1021 may be made of a metal or a non-metal member. When thefirst fixing portion 1011 and thesecond fixing portion 1021 are metal members, an insulating portion may be provided between a transmission line and thefirst fixing portion 1011 and thesecond fixing portion 1021. The insulating part has an insulating function and can also improve the matching degree of the transmission line and the through hole, and the insulating part can be made of an elastic material.
Thefirst fixing part 1011 may have a semi-cylindrical shape, and thesecond fixing part 1021 may have a semi-cylindrical shape. The surface wave exciter may be mounted on the transmission line by engaging thefirst fixing portion 1011 and thesecond fixing portion 1021 in the vertical direction.
Theradiation antenna 103 and thecoaxial feed 104 according to the above-described embodiment are disposed below the second surfacewave excitation portion 1022 to radiate an electromagnetic wave or receive an electromagnetic wave.
The surface wave exciter of the present embodiment is based on the surface wave exciter shown in fig. 2, and is configured with the first fixed portion and the first surface wave excitation portion that are connected to each other, and the second fixed portion and the second surface wave excitation portion that are connected to each other, so that the surface wave exciter can be mounted on the transmission line in a manner of being fastened up and down, thereby achieving quick mounting of the surface wave exciter.
Fig. 4 is a schematic diagram showing a split structure of another surface acoustic wave exciter according to an embodiment of the present invention, and as shown in fig. 4, in the apparatus according to the present embodiment, based on the apparatus structure shown in fig. 3, the first surface acousticwave excitation unit 1012 includes a first transverseelectromagnetic excitation unit 10121 and a first transversemagnetic excitation unit 10122 connected to each other, and the second surface acousticwave excitation unit 1022 includes a second transverseelectromagnetic excitation unit 10221 and a second transversemagnetic excitation unit 10222 connected to each other.
The first transverseelectromagnetic excitation portion 10121 and the second transverseelectromagnetic excitation portion 10221 are matched to form a cylindrical cavity. The first transversemagnetic excitation portion 10122 and the second transversemagnetic excitation portion 10222 are matched to form a conical cavity. The diameter of the cylindrical cavity is smaller than the largest diameter of the conical cavity.
The first Transverseelectromagnetic excitation unit 10121 and the second Transverseelectromagnetic excitation unit 10221 are configured to convert the electromagnetic wave received from theradiation antenna 103 into a surface wave in a coaxial Transverse Electromagnetic (TEM) mode, and the first TransverseMagnetic excitation unit 10122 and the second TransverseMagnetic excitation unit 10222 are configured to convert the surface wave in the TEM mode into a surface wave in a TM mode.
Theradiation antenna 103 is connected below the second transverseelectromagnetic excitation unit 10221, and has a distance of 1/4 electromagnetic wavelengths between the central axis of the radiation antenna and the side surface of thesecond fixing unit 1021, so that impedance matching in the TEM mode is achieved.
The surface wave exciter of this embodiment, through the cylindrical cavity that first transverse electromagnetic excitation portion and second transverse electromagnetic excitation portion match and form, first transverse magnetic excitation portion matches with second transverse magnetic excitation portion and forms conical cavity, realizes the surface wave conversion of electromagnetic wave to TM mode, can promote communication transmission rate and transmission reliability.
On the basis of any of the above embodiments, in one implementation, theradiation antenna 103 is a cone antenna, the bottom surface of the cone antenna is connected to thesecond excitation body 102, and the top of the cone antenna is connected to thecoaxial feed 104.
Fig. 5 is a schematic structural diagram of another surface wave exciter according to an embodiment of the present invention, and as shown in fig. 5, the diameter of the bottom surface of the cone antenna is larger than that of the top surface, so that the cone antenna can increase the radiation energy of the cone antenna to the transmission line and decrease the radiation energy of the side wall of the cone antenna.
In order to further reduce the radiation energy of the side wall of the conical antenna, the surface wave exciter can further comprise a dielectric sleeve which is sleeved outside the radiation antenna. The dielectric sleeve may reduce radiation due to impedance mismatch.
In some embodiments, the bottom surface of the cone antenna may also be rounded at its edges, so that the radiated energy resides at the bottom surface of the cone antenna instead of at the edges, improving edge radiation.
Fig. 6 is a partial structural diagram of a radiation antenna of another surface wave exciter according to an embodiment of the present application, and as shown in fig. 6, the bottom surface of the cone antenna is arc-shaped. For example, the radian of the bottom surface of the conical antenna is matched with the radian of the transmission line so as to achieve the purpose of uniform radiation, thereby uniformly radiating electromagnetic waves to the transmission line.
The surface wave exciter of this application embodiment, the bottom surface through setting up conical antenna is the arc, realizes radiating the electromagnetic wave evenly to the transmission line on, and it is low that it realizes the cost, and can promote the transmission reliability.
The principle of communication using the surface wave exciter according to the embodiment of the present application will be described below by taking two surface wave exciters according to the embodiment of the present application as examples.
Fig. 7 is a schematic diagram of communication between two surface wave actuators according to an embodiment of the present application, where, as shown in fig. 7, one of the two surface wave actuators serves as a transmitting end and the other serves as a receiving end.
The principle of communication of the surface wave exciter as a transmitting end is as follows: the radiation antenna of the surface wave exciter is used for converting an electric signal received from the coaxial feed into an electromagnetic wave and radiating the electromagnetic wave onto the transmission line, the first excitation body and the second excitation body are used for converting the electromagnetic wave into a surface wave, and the surface wave is transmitted to the receiving end along the transmission line.
The communication principle of the surface wave exciter as a receiving end is as follows: the first excitation body and the second excitation body of the surface wave exciter are used for converting the received surface wave into an electromagnetic wave, and the radiation antenna is used for receiving the electromagnetic wave, converting the electromagnetic wave into an electric signal and transmitting the electric signal to the coaxial feed. The coaxial feed, which is a surface wave exciter at the receiving end, can transmit the electrical signal to a radio unit (e.g., RRU) connected thereto, which passes the electrical signal back to the base station. Alternatively, the electrical signal may be transmitted to another surface wave exciter connected thereto, with the surface wave exciter transmitting the electrical signal to the next hop surface wave exciter.
The surface wave exciter can receive and send signals, and therefore communication is achieved through surface waves, and communication transmission rate and transmission reliability are improved.
Embodiments of the present application also provide a communication system that may include a base station, a radio unit, and at least one surface wave exciter as described in any of the above embodiments disposed on a power transmission line.
The communication system of the embodiment of the application can realize surface wave communication through the surface wave exciter of the embodiment of the application, and the surface wave communication has the transmission characteristics of high bandwidth and low attenuation, so that the communication transmission rate and the transmission reliability can be improved.
In the description of the present application, it should be noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, an indirect connection through intervening media, a connection between two elements, or an interaction between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
In the description of the present application, "a plurality" means two or more unless specifically stated otherwise.
Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Claims (10)
1. A surface wave exciter, comprising:
the antenna comprises a first excitation body, a second excitation body, a radiation antenna and a coaxial feed;
the first excitation body and the second excitation body are clamped with each other, a through hole is formed between the first excitation body and the second excitation body which are clamped with each other, the through hole is used for arranging a transmission line, and the transmission line is insulated from the first excitation body and the second excitation body;
one end of the radiation antenna is connected with the second excitation body, and the other end of the radiation antenna is connected with the coaxial feed;
a gap exists between the radiating antenna and the transmission line;
the first excitation body is symmetrical to the second excitation body;
the center axes of the first excitation body and the second excitation body engaged with each other coincide with the center axis of the transmission line.
2. The surface wave exciter of claim 1, wherein the first excitation body comprises a first fixed section and a first surface wave excitation section connected to each other; the second excitation body includes a second fixed part and a second surface wave excitation part connected to each other;
the first fixing part and the second fixing part are mutually clamped, and the first excitation body and the second excitation body are fixed on the transmission line;
the first surface wave excitation portion and the second surface wave excitation portion are matched to form an excitation cavity.
3. The surface wave exciter of claim 2, wherein the first surface wave excitation portion comprises a first transverse electromagnetic excitation portion and a first transverse magnetic excitation portion connected to each other; the second surface wave excitation unit includes a second transverse electromagnetic excitation unit and a second transverse magnetic excitation unit connected to each other;
the first transverse electromagnetic excitation part and the second transverse electromagnetic excitation part are matched to form a cylindrical cavity;
the first transverse magnetic excitation part and the second transverse magnetic excitation part are matched to form a conical cavity;
the diameter of the cylindrical cavity is smaller than the maximum diameter of the conical cavity.
4. A surface wave exciter according to claim 2 or 3, further comprising an insulating portion provided between the transmission line and the first and second fixing portions.
5. A surface wave exciter according to any of claims 1 to 3, characterised in that the radiating antenna is a cone antenna, the base of which is connected to the second excitation body, and the top of which is connected to the coaxial feed.
6. The surface wave exciter of claim 5, wherein the bottom surface of the tapered antenna is curved.
7. The surface wave exciter of claim 6, wherein the edges of the bottom face of the tapered antenna are rounded.
8. A surface wave exciter according to any of claims 1 to 3, 6 or 7, characterised in that the surface wave exciter further comprises a dielectric sleeve which is sleeved outside the radiating antenna.
9. The surface wave exciter according to any of claims 1 to 3, 6 and 7, wherein the radiating antenna is configured to convert an electrical signal received from the coaxial feed into an electromagnetic wave and radiate the electromagnetic wave onto the transmission line, the first and second exciting bodies are configured to convert the electromagnetic wave into a surface wave, and the surface wave is transmitted along the transmission line; or,
the first excitation body and the second excitation body are configured to convert a received surface wave into an electromagnetic wave, the radiation antenna is configured to receive the electromagnetic wave, convert the electromagnetic wave into an electrical signal, and transmit the electrical signal to the coaxial feed, and the surface wave is transmitted along the transmission line.
10. A communication system comprising a base station, a radio unit and at least one surface wave exciter according to any of claims 1 to 9, the surface wave exciter being disposed on a power transmission line.
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| CN201910284001.6ACN111816979B (en) | 2019-04-10 | 2019-04-10 | Surface wave exciters and communication systems |
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| CN201910284001.6ACN111816979B (en) | 2019-04-10 | 2019-04-10 | Surface wave exciters and communication systems |
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| ES2318326T3 (en)* | 2004-08-03 | 2009-05-01 | Fundacion Labein | FLAT ANTENNA. |
| WO2008030208A2 (en)* | 2005-06-29 | 2008-03-13 | Georgia Tech Research Corporation | Multilayer electronic component systems and methods of manufacture |
| US9912031B2 (en)* | 2013-03-07 | 2018-03-06 | Cpg Technologies, Llc | Excitation and use of guided surface wave modes on lossy media |
| US9209902B2 (en)* | 2013-12-10 | 2015-12-08 | At&T Intellectual Property I, L.P. | Quasi-optical coupler |
| US9941566B2 (en)* | 2014-09-10 | 2018-04-10 | Cpg Technologies, Llc | Excitation and use of guided surface wave modes on lossy media |
| US9865911B2 (en)* | 2015-06-25 | 2018-01-09 | At&T Intellectual Property I, L.P. | Waveguide system for slot radiating first electromagnetic waves that are combined into a non-fundamental wave mode second electromagnetic wave on a transmission medium |
| CN105870637A (en)* | 2016-06-16 | 2016-08-17 | 北京邮电大学 | Radial line dielectric resonant antenna array |
| US10490907B2 (en)* | 2016-09-27 | 2019-11-26 | Google Llc | Suppression of surface waves in printed circuit board-based phased-array antennas |
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