基于低轨卫星通信K/Ka 车载相控阵设计

针对卫星通信地面车载终端，提出一种K/Ka 频段相控阵设计方案为用户终端提供卫星信号通信服务。相控阵雷达(phased array radar，PAR)收发系统的接收采用单馈宽带贴片微带天线，发射采用双馈贴片微带天线；通过对单个阵元进行旋转形成2×2 子阵；相控阵天线在方位360°和俯仰60°锥形范围内扫描。实验结果表明：该方案能实现圆极化功能，结构紧凑，提高扫描轴比性能，阵列的增益、阻抗和轴比带宽可达到30%。

Design of K/Ka Vehicle Phased ArrayBased on Low Earth Orbit Satellite Communication

Aiming at the ground SATCOM vehicle terminal, a K/Ka-band phased array design scheme is proposed toprovide satellite signal communication service for the user terminal. The phased array radar (PAR) transceiver system usesa single-fed broadband patch microstrip antenna for reception and a double-fed patch microstrip antenna for transmission; a2×2 sub-array is formed by rotating a single array element; The phased array antenna scans in a cone of 360°in azimuthand 60°in elevation. The experimental results show that the scheme realizes the circular polarization function, has acompact structure, and improves the scanning axial ratio performance. The gain, impedance and axial ratio bandwidth ofthe array can reach 30%.