加载“之”形杆矩形滤波波导缝隙阵列天线设计  

Design of a rectangular filtering waveguide slot array antenna embedded with zigzag poles

作　　者：李洪吉 张晓汉 相东 张丽娜 梁仙灵[1] LI Hongji;ZHANG Xiaohan;XIANG Dong;ZHANG Lina;LIANG Xianing(Shanghai Jiaotong University,Shanghai 200220,China;Research Institute of Shanghai Aerospace Electronic Communication Equipment,Shanghai 201109,China)

机构地区：[1]上海交通大学,上海200220 [2]上海航天电子通讯设备研究所,上海201109

出　　处：《电波科学学报》2023年第3期438-444,共7页Chinese Journal of Radio Science

基　　金：国家自然科学基金(61671416)。

摘　　要：提出了一种新型结构Ku波段矩形滤波波导缝隙阵列天线的设计方法,该阵列天线的滤波特性由嵌入在矩形波导中的“之”形金属杆实现.通过分析“之”形矩形波导滤波结构的等效电路和带阻滤波特性,设计了一个滤波波导缝隙阵列天线.实测结果表明,该滤波波导缝隙阵列天线–15 dB阻抗带宽约为6.8%(12.06~12.91GHz),覆盖Ku波段卫星通信的下行频段(12.25~12.75GHz),带内增益为13.5~14.4dBi,交叉极化电平低于–38dB,且在Ku波段卫星通信的上行频段(14.0~14.5GHz)具有超过29.8dB的带外抑制.A Ku band high efficiency rectangular filtering waveguide slot array antenna is proposed in this paper.The filtering characteristic of the antenna is realized by zigzag metal posts loaded in rectangular waveguide.Based on the analysis of the filtering characteristics of the filtering unit by equivalent circuit and electromagnetic field,a filtering waveguide slot array antenna is designed,fabricated and tested.The measured results show that the–15 dB impedance bandwidth of the filtering waveguide slot array antenna is about 6.8%(12.06-12.91 GHz),covering the downlink band of Ku band satellite communication(12.25-12.75 GHz),and the in-band gain is about 13.5-14.4 dBi,with a cross-polarization level lower than–38 dB.At the same time,the antenna obtains high suppression of more than 29.8 dB in the uplink band of Ku band satellite communication(14.0-14.5 GHz).

关 键 词：滤波波导 滤波天线 带阻滤波 阻抗带宽 

分 类 号：TN823.24[电子电信—信息与通信工程]