一种宽角扫描圆极化微带阵列天线的设计

Design of a Wide-angle Scanning Circularly-Polarised Microstrip Array Antenna

设计出了一种双层宽波束圆极化微带天线,通过Ansoft HFSS软件仿真优化出天线的几何结构参数,并进行了加工和测试。采用该天线做为天线单元,组成一副4×4阵列,进行了天线阵的仿真、加工和测试。结果表明:该天线单元在天线阵中互耦较小,天线方向图基本上无畸变;在工作频带内,天线阵增益大于16.5 dBi,同时能够实现450°×450°范围的波束扫描。

By simulation and optimization based on Ansoft HFSS software,structural parameters are extracted and a wide beam double layer circularly-polarised microstrip antenna is proposed.A test antenna is fabricated and measured.Based on such an antenna,a test array with 4×4 unit is obtained.The simulations and meaasurements indicate that the mutual coupling among elements in the array antenna is weak,influences of radiation pattern due to mutual coupling can be ignored,the gain of the array is more than 16.5 dBi in the operation band,and at the same time the array can steer 450°×450°.