CN103794884A - Method for achieving reflector antenna beam two-dimensional scanning - Google Patents
Method for achieving reflector antenna beam two-dimensional scanning Download PDFInfo
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Abstract
The invention relates to a method for achieving reflector antenna beam two-dimensional scanning. Each feed source (6) in a feed source array is connected with a power distribution network (2) through a corresponding feed channel, and each feed channel comprises an amplifier (5), a phase shifter (4) and an attenuator (3). According to the method for achieving the reflector antenna beam two-dimensional scanning, working states of the amplifiers in the feed channels are selected through adjustment of the attenuators of the feed channels, the selection of stimulation feed source positions and/or weighting of feed amplitude are/is achieved afterwards, large angle scan spans can be achieved, a reflector antenna has higher aperture efficiency, and phase weighting of antenna feed can be achieved through phase deploy of the phase shifters in the feed channels. According to the method for achieving the reflector antenna beam two-dimensional scanning, the complexity of an antenna feed system can be reduced, the aperture efficiency of the antenna can be improved, beam scanning capacity is more flexible, and reliability is higher.
Description
Technical field
The present invention relates to a kind of method that realizes the two-dimensional scan of reflector antenna wave beam, belong to reflector antenna design field.
Background technology
As shown in Figure 1, reflector antenna comprises antenna reflective face 11 and feed array 12.Traditional mode that realizes wave beam two-dimensional scan by reflector antenna is to adopt phase array feed to reflecting surface feed, by spreading to differing that the phase weighting of array element comes to be formed by reflecting surface in compensated scanning before feed battle array; Or adopt combination feed technology to realize the variation of feeding network by multiport matrix amplifier.Above two kinds of modes or Antenna aperture efficiency are lower, or feed system complexity, and are undertaken when wave beam switches realizing wave beam continuous sweep by multiport matrix amplifier.
Summary of the invention
Technical problem to be solved by this invention is: a kind of method that realizes the two-dimensional scan of reflector antenna wave beam is provided; Can reduce the complexity of antenna feed system, improve the aperture efficiency of antenna; Make beam scanning ability more flexible, reliability is higher.
Realize a method for reflector antenna wave beam two-dimensional scan, the each feed in feed array is connected with power distributing network by corresponding feed passage, and each feed passage comprises amplifier, phase shifter and attenuator; Power distributing network is connected with amplifier with attenuator by phase shifter successively, or power distributing network is connected with amplifier with phase shifter by attenuator successively; Amplifier is connected with corresponding feed; Regulate the weighting of break-make and/or the feed amplitude of selecting feed by the attenuation of feed channel attenuation device; Realize the phase weighting of feed by the adjusting of phase shifter phase-shift phase.
The switching of antenna beam realizes by different feed in excitation feed array, and the switching between adjacent beams is to switch to realize by the recursion of adjacent feed.
While switching between adjacent beams, the continuity of wave beam realizes by the phase place allotment of phase shifter in corresponding feed passage.
The number that forms the feed of a wave beam is more than or equal to 1, and between different beams, can adopt the feed of different numbers to work simultaneously.
Described reflector antenna is simple beam antenna or multi-beam antenna.
Design principle of the present invention:
The feed that is placed on reflector antenna focus is maximum to the formation contribution of antenna beam, but can not realize beam scanning; The feed that is placed on reflector antenna focal plane forms and has larger contribution wave beam, in the time of feed off-focal, known according to the principle of geometric optics, to there is certain departing from (with respect to feed when the focus) in controlling antenna wave beam to point, while adopting many feed work, carry out phase difference in compensated scanning path by the phase weighting of feed, realize the scanning of antenna beam.
In the time that the amplitude excitation of amplifier in mouth reaches certain value, can exciting amplifier work, produce certain power stage.When the excitation of input port is during much smaller than this value, amplifier is not energized, inactivity output.When the linear work that meets amplifier when the level of drive requires, can realize by the adjusting of incoming level the control of power output size, then realize the amplitude weighting of feed.
The present invention compared with prior art beneficial effect is:
1, feed feed system annexation is simple.With traditional pass through the reflector antenna that phase array feed encourages or adopt combination feed technology to realize compared with the design that feeding network changes feed system annexation by multiport matrix amplifier simpler.
2, method used in the present invention, and adopts combination feed technology to realize by multiport matrix amplifier compared with the method for beam scanning can to realize wave beam continuous sweep, and feed system annexation is simple.
3, Antenna aperture efficiency is higher.Tradition adopts the phase array feed excitation reflector antenna pushing away before feed battle array to realize the method for two-dimensional scan, after pushing away before feed, and antenna beam broadening, aperture efficiency declines, and causes the aperture efficiency of whole antenna to decline.Along with the increase of scanning angle, require the distance pushing away before feed array to increase, feed scale increases, and Antenna aperture decrease in efficiency is more serious.
4, wave beam control is more flexible.The method applied in the present invention, the attenuator in feed passage not only can be controlled the break-make of feed, can also realize the amplitude weighting of feed; Phase shifter in feed passage can be realized the phase weighting of feed.The feed array with amplitude and phase weighting ability has higher wave beam design flexibility.
Accompanying drawing explanation
Fig. 1 is reflector antenna composition schematic diagram;
Fig. 2 is the array-fed system connection diagram of feed;
Fig. 3 is feed array arrangement schematic diagram;
Fig. 4 is the position of reference wave beam feed;
Feed when Fig. 5 is from wave beam to-Y-direction scanning changes;
Feed when Fig. 6 is from wave beam to-directions X scanning changes;
Fig. 7 is that the feed of wave beam during to-135 ° of scanning directions changes;
Fig. 8 is the two dimension ± 2 ° wave beam coverage diagrams (being illustrated as 1/4 region) that use the inventive method emulation.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 2, the array-fed system of feed of reflector antenna comprises multiple feed passages, power distributing network and amplifier in advance, each feed 6 in feed array is connected with power distributing network 2 by corresponding feed passage, and each feed passage comprises amplifier 5, phase shifter 4 and attenuator 3; Power distributing network 2 is connected with amplifier 5 with attenuator 3 by phase shifter 4 successively, or power distributing network 2 is connected with amplifier 5 with phase shifter 4 by attenuator 3 successively; Amplifier 5 is connected with feed 6.Select the operating state of amplifier in feed passage by the adjusting of attenuator in feed passage, then realize the excitation selection of feed position and/or the weighting of feed amplitude, can realize larger angle scanning span, reflector antenna has higher aperture efficiency simultaneously; Can realize the phase weighting of antenna feed by the phase place allotment of phase shifter in feed passage.The method that adopts feed recursion, can realize the continuous sweep of wave beam in conjunction with the use of phase shifter.
Switching between adjacent radiation wave beam is to be switched and realized by the recursion between radiation feed, and specifically switching approach is the attenuation of resonance-amplifier front end attenuator.
The adjusting of carrying out amplifier output power by the adjusting control of attenuator attenuation realizes the amplitude weighting of feed; Adjusting by feed passage phase shifter phase-shift phase realizes feed phase weighting.
For the antenna of pulsed operation system, wave beam conversion can be switched realization by carry out feed between transmitted pulse, does not affect the continuity of wave beam.
For the antenna of continuous wave working system, wave beam switches and adopts mode that feed replaces: need to participate in feed that next wave beam forms work in advance (attenuator of closing corresponding feed passage), after treating the normal work of this part feed, unnecessary feed power-off (attenuator that is corresponding feed passage is opened).
Embodiment: according to as above thought, designed a kind of reflector antenna that mixes two-dimensional scan, reflecting surface physics bore is the circular aperture antennas of diameter 26m, and antenna feed array is 143 feeds altogether, sweep limits two dimension ± 2 °, the feed array schematic diagram adopting as shown in Figure 3.It should be noted that, the arrangement mode of feed array is not limited to the rectangle rule shown in Fig. 3 and arranges.
In order to make amplifier delivery efficiency maximum, below in design, the amplifier of each feed passage is all operated in saturated mode, and when each feed work, amplitude all equates, beam varies only relies on the variation of feed and the weighting of phase place to realize.
The feed that uses when Fig. 4 has provided reference wave beam and is beam position (0 °, 0 °); The feed that Fig. 5 has used while having provided beam position (0 ° ,-0.64 °), from Fig. 4 and Fig. 5 relatively, there is the translation of a unit to+Y-direction in the feed entirety that wave beam (0 ° ,-0.64 °) uses.The feed that Fig. 6 has used while having provided beam position (0.58 °, 0 °), from Fig. 4 and Fig. 6 relatively, there is the translation of a unit to+directions X in the feed entirety that wave beam (0.58 °, 0 °) uses.The feed that Fig. 7 has used while having provided beam position (0.34 ° ,-0.45 °), from Fig. 4 and Fig. 7 relatively, the feed entirety that wave beam (0.34 ° ,-0.45 °) uses to+X and+there is the translation of a unit in Y-direction.The like, can realize the two-dimensional scan of antenna beam in certain limit.Fig. 8 has provided the feed that uses full front 1/4 region, and wave beam is at directions X (2 °～0 °), the beam scanning coverage diagram in Y-direction (2 °～0 °) region.
Following table provided the beam position directivity factor of above-mentioned designing antenna and for Antenna aperture Efficiency Statistics result.
Table 1 antenna beam performance statistics table
From the statistics of upper table, adopt the reflector antenna of the inventive method design can realize two-dimentional beam scanning, and in the sweep limits of ± 2 °, Antenna aperture efficiency is between 58%～70%.While adopting phase array feed reflector antenna to realize the sweep limits of as above design, the aperture efficiency of antenna is generally no more than 40%.Through more known employing method used in the present invention, in realizing antenna beam two-dimensional scan, greatly improve the aperture efficiency of reflector antenna.Reduced the requirement of system to amplifier output power simultaneously.
If radiation feed adopts the mode of amplitude weighting and phase weighting in design, can make Antenna aperture efficiency further improve, but now active system efficiency will be subject to certain loss.
The inventive method is applicable to, to the reflector antenna design that Antenna aperture efficiency is had relatively high expectations, antenna beam control flexibility ratio is high, to have very strong practicality and the market competitiveness.
The unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (5)
1. realize the method for reflector antenna wave beam two-dimensional scan for one kind, it is characterized in that: the each feed (6) in feed array is connected with power distributing network (2) by corresponding feed passage, and each feed passage comprises amplifier (5), phase shifter (4) and attenuator (3); Power distributing network (2) is connected with amplifier (5) with attenuator (3) by phase shifter (4) successively, or power distributing network (2) is connected with amplifier (5) with phase shifter (4) by attenuator (3) successively; Amplifier (5) is connected with corresponding feed (6); Regulate the weighting of break-make and/or the feed amplitude of selecting feed (6) by the attenuation of feed channel attenuation device (3); The adjusting of the phase-shift phase by phase shifter realizes the phase weighting of feed.
2. a kind of method that realizes the two-dimensional scan of reflector antenna wave beam according to claim 1, it is characterized in that: the switching of antenna beam realizes by different feed (6) in excitation feed array, and the switching between adjacent beams is to switch to realize by the recursion of adjacent feed (6).
3. a kind of method that realizes the two-dimensional scan of reflector antenna wave beam according to claim 2, is characterized in that: while switching between adjacent beams, the continuity of wave beam realizes by the phase place allotment of phase shifter (4) in corresponding feed passage.
4. a kind of method that realizes the two-dimensional scan of reflector antenna wave beam according to claim 1, is characterized in that: the number that forms the feed (6) of a wave beam is more than or equal to 1, and between different beams, can adopt the feed of different numbers to work simultaneously.
5. a kind of method that realizes the two-dimensional scan of reflector antenna wave beam according to claim 1, is characterized in that, described reflector antenna is simple beam antenna or multi-beam antenna.
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Cited By (12)
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| CN104079330A (en) * | 2014-06-27 | 2014-10-01 | 北京计算机技术及应用研究所 | MIMO-phased-array antenna device, system and implementation method |
| WO2016106631A1 (en) * | 2014-12-31 | 2016-07-07 | 华为技术有限公司 | Antenna system and beam control method |
| CN107592146A (en) * | 2016-07-07 | 2018-01-16 | 启碁科技股份有限公司 | Method of controlling antenna and non-volatile computer readable medium |
| US9979082B2 (en) | 2015-08-10 | 2018-05-22 | Viasat, Inc. | Method and apparatus for beam-steerable antenna with single-drive mechanism |
| CN108987937A (en) * | 2018-06-04 | 2018-12-11 | 中国科学院电子学研究所 | A kind of method and apparatus of bifocus Shaped-beam reflector antenna |
| CN109245802A (en) * | 2017-07-11 | 2019-01-18 | 北京大学 | The satellite multi beamforming network equipment and beam-forming method of synthesis tracking wave beam |
| CN109256619A (en) * | 2018-09-25 | 2019-01-22 | Oppo广东移动通信有限公司 | Antenna module, antenna module control method and Related product |
| CN109950703A (en) * | 2017-12-21 | 2019-06-28 | 华为技术有限公司 | Antenna for base station |
| CN110233359A (en) * | 2019-06-21 | 2019-09-13 | 四川大学 | A kind of reflector antenna based on 3D printing technique |
| CN111970012A (en) * | 2020-10-22 | 2020-11-20 | 成都天锐星通科技有限公司 | Fan-shaped radio frequency network and radio frequency signal sending device |
| CN112242611A (en) * | 2019-07-16 | 2021-01-19 | 深圳市威富通讯技术有限公司 | High-gain short-wave intelligent antenna equipment |
| CN112952397A (en) * | 2021-01-29 | 2021-06-11 | 电子科技大学 | Novel millimeter wave communication antenna suitable for multipath transmission environment |
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Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079330A (en) * | 2014-06-27 | 2014-10-01 | 北京计算机技术及应用研究所 | MIMO-phased-array antenna device, system and implementation method |
| WO2016106631A1 (en) * | 2014-12-31 | 2016-07-07 | 华为技术有限公司 | Antenna system and beam control method |
| CN106716720A (en) * | 2014-12-31 | 2017-05-24 | 华为技术有限公司 | Antenna system and beam control method |
| CN106716720B (en) * | 2014-12-31 | 2020-02-14 | 华为技术有限公司 | Antenna system and beam control method |
| US10998623B2 (en) | 2015-08-10 | 2021-05-04 | Viasat, Inc. | Method and apparatus for beam-steerable antenna with single-drive mechanism |
| US9979082B2 (en) | 2015-08-10 | 2018-05-22 | Viasat, Inc. | Method and apparatus for beam-steerable antenna with single-drive mechanism |
| US10483637B2 (en) | 2015-08-10 | 2019-11-19 | Viasat, Inc. | Method and apparatus for beam-steerable antenna with single-drive mechanism |
| US11476573B2 (en) | 2015-08-10 | 2022-10-18 | Viasat, Inc. | Method and apparatus for beam-steerable antenna with single-drive mechanism |
| CN107592146A (en) * | 2016-07-07 | 2018-01-16 | 启碁科技股份有限公司 | Method of controlling antenna and non-volatile computer readable medium |
| CN107592146B (en) * | 2016-07-07 | 2020-06-12 | 启碁科技股份有限公司 | Antenna control method and non-volatile computer-readable storage medium |
| CN109245802A (en) * | 2017-07-11 | 2019-01-18 | 北京大学 | The satellite multi beamforming network equipment and beam-forming method of synthesis tracking wave beam |
| CN109245802B (en) * | 2017-07-11 | 2020-10-09 | 北京大学 | Satellite multi-beam forming network device for synthesizing tracking beam and beam forming method |
| CN109950703A (en) * | 2017-12-21 | 2019-06-28 | 华为技术有限公司 | Antenna for base station |
| CN108987937A (en) * | 2018-06-04 | 2018-12-11 | 中国科学院电子学研究所 | A kind of method and apparatus of bifocus Shaped-beam reflector antenna |
| CN108987937B (en) * | 2018-06-04 | 2020-12-29 | 中国科学院电子学研究所 | Method and device for designing bifocal shaped reflector antenna |
| CN109256619B (en) * | 2018-09-25 | 2021-04-09 | Oppo广东移动通信有限公司 | Antenna assembly, antenna assembly control method and related product |
| CN109256619A (en) * | 2018-09-25 | 2019-01-22 | Oppo广东移动通信有限公司 | Antenna module, antenna module control method and Related product |
| CN110233359B (en) * | 2019-06-21 | 2020-05-05 | 四川大学 | Reflector antenna based on 3D printing technology |
| CN110233359A (en) * | 2019-06-21 | 2019-09-13 | 四川大学 | A kind of reflector antenna based on 3D printing technique |
| CN112242611A (en) * | 2019-07-16 | 2021-01-19 | 深圳市威富通讯技术有限公司 | High-gain short-wave intelligent antenna equipment |
| CN111970012A (en) * | 2020-10-22 | 2020-11-20 | 成都天锐星通科技有限公司 | Fan-shaped radio frequency network and radio frequency signal sending device |
| CN112952397A (en) * | 2021-01-29 | 2021-06-11 | 电子科技大学 | Novel millimeter wave communication antenna suitable for multipath transmission environment |
| CN112952397B (en) * | 2021-01-29 | 2022-04-08 | 电子科技大学 | Novel millimeter wave communication antenna suitable for multipath transmission environment |
| US11996615B2 (en) | 2021-01-29 | 2024-05-28 | University Of Electronic Science And Technology Of China | Reflector antenna system with movable MIMO multiple feeds and adaptive field focusing method for wireless communication in multipath fading environment |
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