星载双圆极化混合波纹喇叭数传天线  

Spaceborne Dual Circularly Polarization Hybrid Corrugated Horn Data Transmission Antenna

作　　者：刘志佳[1] 赵香妮[1] 斯扬[1] 鲁帆[1] 孙银龙 LIU Zhi-jia;ZHAO Xiang-ni;SI Yang;LU Fan;SUN Yin-long(Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)

机构地区：[1]北京空间飞行器总体设计部,北京100094

出　　处：《微波学报》2022年第2期7-11,共5页Journal of Microwaves

摘　　要：提出了一种新型星载X频段点波束数传喇叭天线,这种新型波纹喇叭天线轮廓主要由若干轴向波纹和垂直波纹组成,轴向波纹段将合适比例的高次模式馈入垂直波纹段并共同实现优异的辐射匹配性能。利用基于模式匹配算法的CHAMP软件对天线进行设计优化,按照设计结果加工出产品,最终实测结果表明,该天线在8.0~8.5 GHz频带范围内具有较好的增益、驻波和圆极化特性,覆盖区增益大于21.81 dBi,回波损耗优于-27.8 dB,覆盖区交叉极化抑制优于-34.04 dB,副瓣电平优于-27.19 dB,该天线在低轨卫星上具有广阔的应用前景。An X band space-borne spot beam data transmission horn antenna is introduced in this paper.This novel corrugated horn antenna profile is composed of several axial corrugates and vertical corrugates. The axial corrugates feed the vertical corrugates with appropriate proportion of high-order modes to achieve excellent radiation and matching performance. The CHAMP based on mode match technique(MMT) and ‘minimax optimiser’ have been applied on the antenna to obtain best performance.The measured results show that the antenna obtain good performance of gain, return loss and circular polarization over the whole bandwidth between 8.0 GHz-8.5 GHz, the edge of coverage(EoC) gain is more than 21.81 dBi, return loss is less than-27.8 dB, lower EoC cross-polar discrimination(XPD) is less than-34.04 dB,the sidelobe is less than-27.19 dB, the antenna has broad application prospects in LEO satellite.

关 键 词：星载天线 低交叉极化 波纹喇叭 低副瓣 低轨卫星 

分 类 号：TN823[电子电信—信息与通信工程]