卫星通信毫米波天线阵列及馈电网络的设计与实现

Design and Implementation of Millimeter-wave Antenna Array and Feeding Network for Satellite Communications

摘要:

随着卫星通信向高频段演进，毫米波频段因带宽优势成为研究焦点。文中针对28 GHz频段设计了4×4平面微带天线阵列及馈电网络，以满足低轨卫星通信终端需求。同时，天线单元采用多层贴片结构实现圆极化，以优化阵元间距抑制栅瓣；馈电网络结合不等分功分器与移相器，通过LTCC工艺集成以降低损耗。研究表明，该方案可有效补偿毫米波链路损耗，其轻量化、高增益特性符合卫星终端工程化要求，为毫米波卫星通信设备研发提供了实践参考。

Abstract:

With the evolution of satellite communications toward high-frequency bands, the millimeter-wave band has become a research focus due to its bandwidth advantages.In this paper, a 4×4 planar microstrip antenna array and its feeding network are designed for the 28 GHz band to meet the requirements of low Earth orbitsatellite communication terminals.Meanwhile, a multi-layer patch structure is adopted for the antenna element to achieve circular polarization, so as to optimize the element spacing and suppress grating lobes.The feeding network combines unequal power dividers and phase shifters, and is integrated using low-temperature co-fired ceramic technology to reduce insertion loss.Research indicates that the proposed scheme can effectively compensate for millimeter-wave link loss, and its lightweight and high-gain characteristics meet the engineering requirements of satellite terminals, providing a practical reference for the development of millimeter-wave satellite communication equipment.