300mm口径W波段辐射计偏馈反射面天线设计  

Design of 300 mm W-band radiometer offset-feed reflector antenna

作　　者：彭树生[1] 吴礼[1] 李向芹 

机构地区：[1]南京理工大学电光学院 [2]上海航天技术研究院第八〇四研究所

出　　处：《红外与毫米波学报》2013年第6期545-549,共5页Journal of Infrared and Millimeter Waves

摘　　要：为W波段辐射计设计了一副口径为300 mm偏馈反射面天线,天线要求的工作频率为94.5 GHz,副瓣电平低于-25 dB,交叉极化电平低于-30 dB,半功率波束宽度优于1°.采用较小偏置角以改善偏置天线的交叉极化特性,采用焦面场匹配法和模比法设计了匹配馈源,通过仿真优化设计,得到良好的波瓣等化电平和驻波比.测量结果表明,测量值与理论值吻合,满足辐射计的指标要求.A 300 mm offset-feed reflector antenna was designed for a W-band radiometer. Its parameter are 94.5 GHz operating frequency, sidelobe level of less than-25 dB, cross polarization level of less -30 dB and half-power beamwidth of better than 1 . A smaller offset angle was adopted to improve the antenna cross polarization characteristics. This matching feed is designed with the focal plane field matching method and the modulus ratio method. It is optimized to get good VSWR and lobe equalizing level. Measurement results show that this antenna meets the requirements of the radiometer. Its measured and theoretical values are coincided.

关 键 词：W波段 偏馈反射面天线 匹配馈源 模比法 

分 类 号：TN823.27[电子电信—信息与通信工程] TN823.28