X波段高隔离度双信道多波束天线系统实现

Implementation of X-band High Isolation Dual-channel Multi-beam Antenna System

针对复杂战场环境对战术通信系统提出的高速率、快响应等应用要求,在X波段搭建全向天线/定向天线双信道、定向天线快速切换的工程样机。利用全向天线信道传输信令,可快速响应节点拓扑变化,实现快速邻居节点发现与网络更新。采用分区定向天线与快速切换PIN开关构成传输业务的多波束子系统,实现全方位高通信速率覆盖。全向天线采用同轴开槽技术方案,全向性能良好。定向天线采用2×2规模微带阵列,实现高增益宽波束。对全向天线与定向天线的隔离度展开仿真与测试分析,其隔离度典型值优于70 d B。基于双信道及多波束架构的工程样机在外场拉锯试验中通信效果良好。

To meet the requirements of tactical communication systems for high rate and fast response,a dual-channel prototype inX-band is proposed. The omnidirectional antennas for signaling can quickly respond to changes in node topology to achieve rapid neighbor discovery and network updates. The directional antenna with fast-switching PIN switch forms the multi-beam subsystem,achieving full coverage and high-rate. The omnidirectional antenna adopts coaxial slot technology and achieves good omnidirectional characteristics. The directional antenna is a 2 × 2 scale microstrip array and realizes high-gain and wide beam-width. The isolation between the omnidirectional antenna and directional antenna is tested by simulation,and it is typically better than 70 dB. The prototype shows good communication performance in external field test, which meets the application requirements and verifies the excellent characteristics of the antenna system.