CN112134001A - W-band directional diagram reconfigurable shaped surface antenna and system - Google Patents
W-band directional diagram reconfigurable shaped surface antenna and system Download PDFInfo
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- CN112134001A CN112134001A CN202011005750.XA CN202011005750A CN112134001A CN 112134001 A CN112134001 A CN 112134001A CN 202011005750 A CN202011005750 A CN 202011005750A CN 112134001 A CN112134001 A CN 112134001A
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- 238000010586 diagram Methods 0.000 title claims abstract description 26
- 230000005855 radiation Effects 0.000 claims abstract description 24
- 230000009471 action Effects 0.000 claims abstract description 17
- 230000005284 excitation Effects 0.000 claims abstract description 14
- 239000011159 matrix material Substances 0.000 claims abstract description 5
- 238000005457 optimization Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 abstract description 10
- 238000002955 isolation Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/12—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave
- H01Q19/17—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source comprising two or more radiating elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
- H01Q19/19—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
Abstract
The invention discloses a reconfigurable forming surface antenna of a W-band directional diagram, which comprises a plurality of feed sources, an auxiliary reflecting surface and a main reflecting surface, wherein the feed sources are arranged on a focal plane of the auxiliary reflecting surface according to a matrix arrangement mode, each feed source has set offset relative to a focus center, microwave signals are sent from the feed sources and then sequentially pass through the main reflecting surface and the auxiliary reflecting surface to reach a target action region, and through adjusting the excitation coefficient of each unit feed source in a multi-feed-source array, the spatial superposition of wave beams sent by different unit feed sources in a far-field radiation directional diagram can meet the requirement of the gain of the target region, so that an antenna forming directional diagram and the like are realized; the invention solves the problems of single structure, fixed action distance, lower working efficiency and the like of the traditional antenna, and improves the effective radiation to a target area through the shaping design, so that the reflecting surface antenna meets the radiation requirements of high gain, high isolation and low side lobe in the radiation coverage target area.
Description
Technical Field
The invention relates to the technical field of antennas, in particular to a forming surface antenna with a reconfigurable W-band directional diagram and a system.
Background
The microwave initiative refuses, it is a kind of "deterrent" non-fatal weapon, this weapon utilizes the heat-sensitive effect of the electromagnetic wave, adopt the directional aerial, radiate the electromagnetic wave to the human skin, make it produce intolerable hot pain sense and stop the hostile action.
The antenna system is used as a component of an active rejection system, and has the function of focusing electromagnetic energy and directing the electromagnetic energy to an action target to finish accurate radiation of a target group. During the operation of the active weapon rejection system, the target and area of action change at any time, which requires the radiation area of the antenna to change accordingly. The shaped reflector antenna system can shape the wave beam of the electromagnetic wave to enable the radiation area of the antenna to correspond to the rejection target area.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a forming surface antenna with a reconfigurable W-waveband directional diagram and a system thereof, solves the problems of single structure, fixed action distance, lower working efficiency and the like of the traditional antenna, and improves the effective radiation to a target area through forming design so that the reflecting surface antenna meets the radiation requirements of high gain, high isolation and low side lobe in a radiation coverage target area.
The purpose of the invention is realized by the following scheme:
a reconfigurable shaped-surface antenna with W-band directional diagram comprises a plurality of feed sources, an auxiliary reflecting surface and a main reflecting surface, wherein the feed sources are arranged on a focal plane of the auxiliary reflecting surface according to a matrix arrangement mode, each feed source has set offset relative to the center of the focal point, microwave signals are sent from the feed sources and then sequentially pass through the main reflecting surface and the auxiliary reflecting surface to reach a target action region, and the beam sent by different unit feed sources is superposed in the space of a far-field radiation directional diagram by adjusting the excitation coefficient of each unit feed source in a multi-feed-source array.
Furthermore, the main reflecting surface is a paraboloid, the auxiliary reflecting surface is an ellipsoid, the main reflecting paraboloid is provided with a fixed focus, the auxiliary reflecting ellipsoid is provided with two focuses, one focus of the ellipsoid is superposed with the focus of the paraboloid, and the other focus of the ellipsoid is the right center of the feed source array.
Further, the excitation coefficients include an amplitude parameter and a phase parameter.
Further, the directions of the offsets of the feed sources and the magnitudes of the offsets are different.
A W-band directional diagram reconfigurable shaped surface antenna system comprises a W-band directional diagram reconfigurable shaped surface antenna and an antenna control system; and an antenna forming calculation module is arranged in the antenna control system and used for calculating and optimizing the excitation coefficient of each unit feed source in the multi-feed-source array.
Further, the antenna control system comprises a memory, and the memory is used for storing the excitation coefficients of the unit feeds in the multi-feed array after the calculation optimization.
The invention has the beneficial effects that:
(1) the invention solves the problems of single structure, fixed action distance, lower working efficiency and the like of the traditional antenna by adopting a plurality of feed sources, double offset reflecting surfaces and the like, and improves the effective radiation to a target area by shaping design, so that the reflecting surface antenna meets the radiation requirements of high gain, high isolation and low side lobe in a radiation coverage target area.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a multi-feed dual-reflector shaped antenna system;
FIG. 2 is a schematic diagram of the distribution of a feed source array in a rectangular coordinate system;
FIG. 3 is a schematic diagram of multi-feed parameter optimization;
fig. 4 is a schematic diagram of an antenna structure.
Detailed Description
All of the features disclosed in the specification for all of the embodiments (including any accompanying claims, abstract and drawings), or all of the steps of a method or process so disclosed, may be combined and/or expanded, or substituted, in any way, except for mutually exclusive features and/or steps.
As shown in fig. 1 to 4, a W-band directional diagram reconfigurable forming surface antenna comprises a plurality of feed sources, an auxiliary reflecting surface and a main reflecting surface, wherein the plurality of feed sources are arranged on a focal plane of the auxiliary reflecting surface according to a matrix arrangement mode, each feed source has a set offset relative to a focal center, microwave signals are transmitted from the feed sources and then sequentially pass through the main reflecting surface and the auxiliary reflecting surface to reach a target action region, and through adjusting excitation coefficients of each unit feed source in a multi-feed source array, the spatial superposition of wave beams transmitted by different unit feed sources in a far-field radiation directional diagram can meet the requirement of target region gain, so that the forming of an antenna directional diagram is realized.
Furthermore, the main reflecting surface is a paraboloid, the auxiliary reflecting surface is an ellipsoid, the main reflecting paraboloid is provided with a fixed focus, the auxiliary reflecting ellipsoid is provided with two focuses, one focus of the ellipsoid is superposed with the focus of the paraboloid, and the other focus of the ellipsoid is the right center of the feed source array.
Further, the excitation coefficients include an amplitude parameter and a phase parameter.
Further, the directions of the offsets of the feed sources and the magnitudes of the offsets are different.
A W-band directional diagram reconfigurable shaped surface antenna system comprises a W-band directional diagram reconfigurable shaped surface antenna and an antenna control system; and an antenna forming calculation module is arranged in the antenna control system and used for calculating and optimizing the excitation coefficient of each unit feed source in the multi-feed-source array.
Further, the antenna control system comprises a memory, and the memory is used for storing the excitation coefficients of the unit feeds in the multi-feed array after the calculation optimization.
According to the rejection system index decomposition, the antenna system works in the W wave band, the system can bear tens of kilowatts of power, the far-field radiation gain is higher than 40dB, the working efficiency can reach 80%, and the antenna action area is adjustable. In order to achieve the indexes, the antenna system adopts a scheme of multiple feed sources and double offset reflecting surfaces. In the working process of the antenna, the radiation characteristic of the antenna can be changed by adjusting the amplitude and phase parameters of each unit in the multi-feed array, and the antenna directional pattern shaping is realized. And the structural scheme of the double reflecting surfaces is adopted, so that the beam propagation freedom degree can be increased, and the power distribution, the side lobe level, the working efficiency and the like of the high-power microwave rejection signal can be well controlled. The system mainly comprises four parts: the antenna system comprises a feed source, an auxiliary reflecting surface, a main reflecting surface and an antenna control system, wherein the topological structure of the antenna system is shown in figure 1.
The feed source is an important component of the set of shaping reflector antenna system, and microwave signals are sent out from the feed source and reach a target action region through the main reflector and the auxiliary reflector. The antenna system comprises a plurality of feed sources, microwave signals generated from a microwave power tube finally reach the feed sources through a power distribution network and a phase-shifting attenuation system, and the feed sources are distributed as shown in figure 2.
The antenna system adopts a multi-feed source mode to realize the shaping of a directional diagram, the multi-feed sources are arranged on a focal plane of an auxiliary reflecting surface according to a matrix arrangement mode, and each feed source has a certain amount of deviation relative to the center of the focal point. According to the requirement of shaping, the offset direction and the offset of each feed source are different. Through reasonable control and adjustment of the excitation coefficients (amplitude and phase) of all units in the feed source array, the beams emitted by different feed sources are spatially superposed in a far-field radiation pattern to meet the requirement of target area gain.
For the fast-changing characteristic of the rejection system acting target, the antenna radiation area needs to respond quickly according to target change. With the requirement of rapid and complicated antenna shaping, antenna shaping calculation is important to obtain the best shaping effect. The optimization of the multi-feed source given parameters needs to be repeatedly and iteratively calculated for many times to obtain the final effect, and the parameter optimization process is shown in fig. 3.
Optimized multi-feed source parameters are finally stored in a memory of the antenna control system, and then in the subsequent working process, aiming at different action areas, the control system issues instructions, and the working parameters of each feed source are designated by the system.
The primary and secondary reflective surfaces of the system are shown in fig. 3, the primary reflective surface is a paraboloid, the secondary reflective surface is an ellipsoid, the primary reflective paraboloid has a fixed focus, and the secondary reflective ellipsoid has two focuses. One focus of the ellipsoid is coincident with the focus of the paraboloid, and the other focus of the ellipsoid is the right center of the feed source array.
The antenna control system has the main functions that according to an action target area obtained by the rejection detection system, the action area of the antenna system is obtained through the rapid calculation of the host system, the amplitude and the phase of a signal output by each feed source are adjusted, the output directional diagram of the feed source is rapidly adjusted, and the antenna radiation area can cover the range of rejection people.
In order to meet the requirement of an active rejection system on Effective Isotropic Radiated Power (EIRP) of a target area, the antenna system adopts the multi-feed source and double-offset reflector technology, and solves the problems of single structure, fixed action distance, lower working efficiency and the like of the traditional antenna. By means of shaping design, effective radiation to a target area is improved, and the reflecting surface antenna meets the radiation requirements of high gain, high isolation and low side lobe in a radiation coverage target area.
The main action target of the rejection system is 20m-100m of people, and the antenna system is required to have good target identification capability, better anti-interference capability and quick response capability.
The functionality of the present invention, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Other embodiments than the above examples may be devised by those skilled in the art based on the foregoing disclosure, or by adapting and using knowledge or techniques of the relevant art, and features of various embodiments may be interchanged or substituted and such modifications and variations that may be made by those skilled in the art without departing from the spirit and scope of the present invention are intended to be within the scope of the following claims.
Claims (6)
1. A reconfigurable forming surface antenna of a W-band directional diagram is characterized by comprising a plurality of feed sources, an auxiliary reflecting surface and a main reflecting surface, wherein the feed sources are arranged on a focal plane of the auxiliary reflecting surface in a matrix arrangement mode, each feed source has set offset relative to a focal center, microwave signals are emitted from the feed sources and then sequentially pass through the main reflecting surface and the auxiliary reflecting surface to reach a target action region, and through adjusting the excitation coefficients of all unit feed sources in a multi-feed-source array, beams emitted by different unit feed sources are superposed in the space of a far-field radiation directional diagram.
2. A W-band pattern reconfigurable shaped surface antenna as claimed in claim 1, wherein the primary reflector is a paraboloid and the secondary reflector is an ellipsoid, the primary reflector paraboloid has a fixed focus, the secondary reflector ellipsoid has two foci, one focus of the ellipsoid coincides with the focus of the paraboloid, and the other focus of the ellipsoid is the exact center of the feed array.
3. The W-band pattern reconfigurable shaped surface antenna according to claim 1, characterized in that the excitation coefficients include an amplitude parameter and a phase parameter.
4. The W-band pattern reconfigurable shaped-surface antenna according to claim 1, characterized in that the direction of each feed offset and the magnitude of the offset are different.
5. A W-band directional diagram reconfigurable shaped surface antenna system is characterized by comprising a W-band directional diagram reconfigurable shaped surface antenna and an antenna control system; and an antenna forming calculation module is arranged in the antenna control system and used for calculating and optimizing the excitation coefficient of each unit feed source in the multi-feed-source array.
6. The W-band pattern reconfigurable forming surface antenna system according to claim 5, wherein the antenna control system includes a memory for storing excitation coefficients of the respective element feeds in the multi-feed array after optimization of calculation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011005750.XA CN112134001A (en) | 2020-09-23 | 2020-09-23 | W-band directional diagram reconfigurable shaped surface antenna and system |
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| CN202011005750.XA CN112134001A (en) | 2020-09-23 | 2020-09-23 | W-band directional diagram reconfigurable shaped surface antenna and system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113258284A (en) * | 2021-06-10 | 2021-08-13 | 中国人民解放军海军工程大学 | High-power microwave ring-focus dual-reflector antenna |
| CN113659346A (en) * | 2021-07-30 | 2021-11-16 | 中国航空工业集团公司济南特种结构研究所 | Antenna hood electrical thickness test antenna and use method |
| CN114725677A (en) * | 2022-03-14 | 2022-07-08 | 中国电子科技集团公司第十四研究所 | Novel wide waveguide feed structure based on variable wavefront |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113659346A (en) * | 2021-07-30 | 2021-11-16 | 中国航空工业集团公司济南特种结构研究所 | Antenna hood electrical thickness test antenna and use method |
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| CN114725677A (en) * | 2022-03-14 | 2022-07-08 | 中国电子科技集团公司第十四研究所 | Novel wide waveguide feed structure based on variable wavefront |
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Application publication date: 20201225 |