一种DBF体制卫星接收共形相控阵天线  

A novel conformal DBF receiving phased array on satellite application

作　　者：韩国栋[1] 张宙[1] 王焕菊[1] HAN Guodong,ZHANG Zhou,WANG Huanju(The 54th Research Institute of China Electronics Technology Corporation, Shijiazhuang 050081, Chin)

机构地区：[1]中国电子科技集团公司第五十四研究所,石家庄050081

出　　处：《电波科学学报》2018年第3期322-329,共8页Chinese Journal of Radio Science

基　　金：河北省博士后基金(B2017003016)

摘　　要：提出了一种全数字波束合成(digital beam forming,DBF)体制卫星接收共形相控阵天线设计思路.该天线采用半球形共形阵排布方式,阵元采用双层微带贴片天线实现宽带圆极化.在半球形的布局下,通过判断卫星信号来波方向在球面上的投影来选择工作的阵元,形成与来波方向一致的波束,在全空域(—75°~75°)的仰角内可实现增益起伏小于1.5dB的波束覆盖;后端采用射频数字一体化设计技术,可同时形成多个波束,实现了一个天线跟踪多颗卫星的能力.最后加工和测试了天线样机,验证了共形半球阵的波束形成能力.提出的天线设计思路有助于拓展数字波束体制在卫星通信中的应用,对全空域多波束相控阵天线的研制具有指导意义.A novel digital beam forming conformal phased array employed for satellite communication is introduced. A hemispherical shaped structure is designed for arranging the antenna elements, and the dual-layer patch antenna element is adopted to achieve broadband circular polarization. Depending on the directions of incoming waves, the elements/RF channels projected over the surface of the hemispherical array are selectively operating for beam forming. The beam coverage with gain variation within 1.5 dB are achieved in the space from -75° to 75°. The RF-digital integrative technique is proposed to achieve multiple beams at the same time, so the tracking of several satellites using one set of antenna is achieved. Finally, a prototype is manufactured and tested to verify the beam forming capability of the conformal hemispherical array. The proposed antenna is helpful for extending the beam forming architecture in satellite communication, and is instructive for engineering research.

关 键 词：数字波束形成 半球面共形 相控阵 卫星应用 

分 类 号：TN821[电子电信—信息与通信工程]