W波段双极化单脉冲天线设计
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摘要
为了探测目标的极化特性,研制了工作在W波段的双极化单脉冲卡塞格伦天线.天线由主反射面、副反射面、馈源喇叭、正交模耦合器及和差器组成.天线主反射面口径为137 mm,馈源为五喇叭形式,正交模耦合器采用渐变波导匹配方案,和差器通过平面型定向耦合结构实现.通过将馈源喇叭、正交模耦合器及和差器集成设计,减小了连接损耗,压缩了天线纵向尺寸.测试结果表明,天线驻波带宽约3. 7 GHz,极化隔离度优于35 dB,和波束增益大于37. 9 dBi,副瓣电平优于-15 dB,差波束零深优于-25 dB.天线在W波段实现了较好地双极化单脉冲性能.
In order to detect the polarization properties of the target,a dual-polarized monopulse Cassegrain antenna at W-band is proposed. The antenna is composed of the main-reflector,the sub-reflector,the feed horns,the orthomode transducer,and the sum-differential network. The aperture diameter of the antenna is 137 mm,the feed contains five horns,the orthomode transducer is designed using the tapered waveguide,and the sum-differential network is realized by the planer coupler. The feed horns,orthomode transducer,and sum-differential network are integrated designed to reduce the insertion loss and compress the size of the antenna. The measured results showthat the impedance bandwidth of the antenna is about 3. 7 GHz,the polarization isolation is greater than 35 dB,the maximal gain of the sum beam is about 37. 9 dBi,the sidelobe level is below-15 dB,and the null depth of the differential beam is better than-25 dB. The antenna shows good dual-polarized monopulse performance at W-band.
In order to detect the polarization properties of the target,a dual-polarized monopulse Cassegrain antenna at W-band is proposed. The antenna is composed of the main-reflector,the sub-reflector,the feed horns,the orthomode transducer,and the sum-differential network. The aperture diameter of the antenna is 137 mm,the feed contains five horns,the orthomode transducer is designed using the tapered waveguide,and the sum-differential network is realized by the planer coupler. The feed horns,orthomode transducer,and sum-differential network are integrated designed to reduce the insertion loss and compress the size of the antenna. The measured results showthat the impedance bandwidth of the antenna is about 3. 7 GHz,the polarization isolation is greater than 35 dB,the maximal gain of the sum beam is about 37. 9 dBi,the sidelobe level is below-15 dB,and the null depth of the differential beam is better than-25 dB. The antenna shows good dual-polarized monopulse performance at W-band.
引文
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[2]CHEN Xin,QU Jin,PAN Wen-Wu,et al. The shaped millimeter-wave antenna with offset feed and dual-reflector[J]. J. Infrared Millim. Waves,(陈鑫,屈劲,潘文武,等.毫米波赋形偏馈反射面天线技术.红外与毫米波学报),2012,31(1):42-46.
[3]PENG Shu-Sheng,WU Li,LI Xiang-Qin. Design of 300mm W-band radiometer offset-feed reflector antenna[J]. J. Infrared Millim. Waves,(彭树生,吴礼,李向芹. 300 mm口径W波段辐射计偏馈反射面天线设计.红外与毫米波学报),2013,32(6):545-549.
[4]CHEN Qi-Ke,LI Liang-Chao,FAN Yong,et al. Design of W-band 16 elements full sampling focal plane linear array[J]. J. Infrared Millim. Waves,(陈其科,李良超,樊勇,等. W波段16元完全采样焦平面线性阵列天线设计.红外与毫米波学报),2013,32(1):23-27.
[5]CHENG Yu-Jian,HONG Wei,WU Ke,94 GHz substrate integrated monopulse antenna array[J]. IEEE Transactions on Antennas and Propagation. 2012,60(1):121-129.
[6]ZHENG Pei,ZHAO Guo-Qiang,JIN Cheng,et al. W-band high aperture efficiency monopulse Cassegrain antenna based on aperture field approach[J]. J.. Infrared Millim.Waves,(郑沛,赵国强,金城,等.基于口面场方法的W波段高口面效率单脉冲卡塞格伦天线.红外与毫米波学报),2015,34(6):700-704.
[7]CHENG Yu-Jian,WANG Jun,LIU Xiao-Liang. 94GHz substrate integrated waveguide dual-circular-polarization shared-aperture parallel-plate long-slot array antenna with low sidelobe level[J]. IEEE Transactions on Antennas&Propagation,2017,65(11),5855-5861.
[8]ZHENG Pei,ZHAO Guo-Qiang,XU Shen-Heng,et al. Design of a W-band full-polarization monopulse Cassegrain antenna[J]. IEEE Antennas and Wireless Propagation Letters,2017,16:99-103.
[9]ZHENG Pei,HU Bing,XU Shen-Heng,et al. A W-band high-aperture efficiency multipolarized monopulse Cassegrain antenna fed by phase microstrip patch quad[J]. IEEE Antennas and Wireless Propagation Letters,2017,16:1609-1613.
[10]WANG Yan-Xun,Researches on antenna and beam transformation by using quasi-optical technique[D],Nanjing:Southeast University Dissertation,(王彦勋,准光技术在天馈及波束变换中的应用研究,南京:东南大学博士学位论文),2015.
[11]YAO Chang-Fei,ZHOU Ming,Luo Yun-Sheng,et al. Development of a W band orthomode transducer[J]. Journal of Microwaves,(姚常飞,周明,罗运生,等. W波段宽带正交模转换器研制.微波学报),2012,28(5):76-80.
[12]Pisano Giampaolo,Pietranera Luca,Isaak Kate,et al. A broadband WR10 turnstile junction orthomode transducer[J]. IEEE Microwave and Wireless Components Letters,2007,17(4),286-288.