X波段同轴表贴微带隔离环行器设计

Design of X-band Microstrip Isolator-circulator Based on Co-axial Surface Mounted Technology

摘要: 介绍了一种X波段微带隔离环行器的设计，通过HFSS软件仿真结合矢量网络分析仪测试技术，成功研制出了一种接口形式为同轴表贴的三端口微带器件。该器件三端口驻波(VSWR)≤1.40，插入损耗S₂₁≤0.6 dB，S₃₂≤1.2dB，隔离度S₁₂≥12 dB，S₂₃≥28 dB，带宽超过40%。可独立于收发组件外，采用SMT工艺实现与天线单元绕线层一体化贴装，满足现代雷达小型化、宽带化、经济化的发展趋势。

Abstract: A design of microstrip isolator-circulator in X-band is described by using HFSS simulation software and microwave measurements with VNA techniques, a kind of microstrip components with three co-axial SMT ports was successfully realized. The component features three ports VSWR of equal to and less than 1.40, insertion isolations of equal to and less than 0.6 dB for S₂₁ and 1.2 dB for S₃₂, isolations of equal to and higher than 12 dB for S₁₂ and 28 dB for S₂₃, and effective bandwidth of more than 40%. By using SMT technique, the isolator-circulator can realize integrated mounting with antenna unit winding layer outside the T/R component, realizing the trend of miniaturization, broadband and economic development of modern radar.