双馈源双偏置结构星载通信多波束天线
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摘要
为了使星载通信天线产生赋形波束的同时,又能辐射具有扫描特性的点波束满足特殊情形下的通信要求,提出了一种以单馈源赋形反射面天线为基础,利用另一个馈源进行副反射面赋形,补偿主反射面口径相位差的方法,从而形成高效率点波束,并通过副反射面及对应馈源横向偏焦实现点波束扫描的目的。为了检验方法的有效性,仿真实验了一副口径为2.2 m的赋形反射面天线。实验结果表明:赋形波束在服务区内部的最小增益是30.0 dBi,点波束在服务区内部及周边区域扫描时具有比赋形波束更高的增益,因此,所提方法是有效的。
In order to simultaneously generate shaped beam and spot beams with scanning characteristics to meet the special requirements for space-borne communication antenna. A method using a sub-reflector to compensate phase difference on the aperture of main reflector is proposed,which is based on a shaped reflector with a single-feed. Another feed is used to shape sub-reflector,thereby forming a high efficiency spot beam. The function of scanning is achieved by lateral focusing of sub-reflector and the corresponding feed. To test effectiveness of this method,a shaped reflector antenna with a 2.2 m diameter aperture is simulated. The experimental results show that the minimum gain of shaped beam covering service area is 30.0 dBi and the gains of the spot beam scanning inside and outside the service area are even higher. The effectiveness of this method is demonstrated.
In order to simultaneously generate shaped beam and spot beams with scanning characteristics to meet the special requirements for space-borne communication antenna. A method using a sub-reflector to compensate phase difference on the aperture of main reflector is proposed,which is based on a shaped reflector with a single-feed. Another feed is used to shape sub-reflector,thereby forming a high efficiency spot beam. The function of scanning is achieved by lateral focusing of sub-reflector and the corresponding feed. To test effectiveness of this method,a shaped reflector antenna with a 2.2 m diameter aperture is simulated. The experimental results show that the minimum gain of shaped beam covering service area is 30.0 dBi and the gains of the spot beam scanning inside and outside the service area are even higher. The effectiveness of this method is demonstrated.
引文
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[2]张新刚,吴刚,钟鹰.在轨重构抛物面反射阵天线相位优化设计[J].电波科学学报,2012,27(1):197-202Zhang X G,Wu G,Zhong Y.The phase optimization of the paraboloidal reflect array antenna on satellite[J].Chinese Journal of Radio Science,2012,27(1):197-202
[3]李章义,万国宾,张静,等.抛物面天线小形变赋形及波束重构方法[J].系统工程与电子技术,2015,37(10):2217-2221Li Z Y,Wan G B,Zhang J,et al.Approach of micro deformation shaping and beam reconfiguration for parabolic antenna[J].Systems Engineering and Electronics,2015,37(10):2217-2221
[4]Zhou M,Borries O,Jфrgensen E.Design and optimization of a single-layer planar transmit-receive contoured beam reflect array with enhanced performance[J].IEEE Transactions on Antennas&Propagation,2015,63(4):1247-1254
[5]Mahajan M,Jyoti R,Sood K,et al.A method of generating simultaneous contoured and pencil beams from single shaped reflector antenna[J].IEEE Transactions on Antennas&Propagation,2013,61(10):5297-5301
[6]段玉虎.副反射面调整模型及工程实现方法[J].飞行器测控学报,2017,36(3):180-186Duan Y H.Subreflector adjustment model and engineering realization method[J].Journal of Spacecraft TT&C Technology,2017,36(3):180-186
[7]Wang W T,Gong S X,Wang X,et al.Differential evolution algorithm and method of moments for the design of low-RCS antenna[J].IEEE Antennas&Wireless Propagation Letters,2010,9(1):295-298
[8]Constantine A Balanis.Antenna theory:Analysis and design(3rd Edition)[M].Hoboken:Wiley-Interscience,2005.893-934
[9]张新刚,丁伟,陶啸.基于极小极大值算法的多波束天线优化设计[J].微波学报,2015,31(2):45-49Zhang X G,Ding W,Tao X.Optimized design of multibeam antenna based on the mini-max method[J].Journal of Microwaves,2015,31(2):45-49
[10]Ruze J.Lateral-feed displacement in a paraboloid[J].IEEE Transactions on Antennas&Propagation,1964,13(5):660-665
[11]荣吉利,夏鹏,冯志伟,等.抛物面天线反射面参数化建模与热变形优化分析[J].北京理工大学学报,2017,37(10):998-1008Rong J L,Xia P,Feng Z W,et al.Parameterized modeling and thermal deformation analysis for paraboloid antenna reflector[J].Transactions of Beijing Institute of Technology,2017,37(10):998-1008
[12]段玉虎.星载多波束天线设计[J].飞行器测控学报,2011,30(1):16-21Duan Y H.Design of multi-beam satellite antennas[J].Journal of Spacecraft TT&C Technology,2011,30(1):16-21
[13]Rahman N H A,Islam M T,Misran N,et al.Generating contoured beams for Malaysia region by using a caustic locus graph[J].IEEE Antennas&Propagation Magazine,2015,56(6):328-336
[14]Mckay J E,Robertson D A,Cruickshank P A S,et al.Compact wideband corrugated feedhorns with ultra-low sidelobes for very high performance antennas and quasioptical systems[J].IEEE Transactions on Antennas and Propagation,2013,61(4):1714-1721