圆极化介质谐振天线设计与实现

探地雷达、隔墙雷达、人体接触式微波治疗探测设备的天线设计,要考虑应用场景并加入应用场景一并设计或仿真计算,才能获得最佳的应用效果。本文采用应用背景下的设计方法,设计了一种应用于接触式微波检测系统的圆极化介质天线。该天线工作在L波段,采用带状线缝隙耦合馈电。通过不等长十字耦合缝隙实现圆极化。研究了辐射背景在一定范围内变化时,对天线回波损耗,轴比和方向图的影响。并制作了实物,VSWR<2的带宽,仿真结果为16.6%,实测结果为29.7%。

Design and implementation of circularly polarized dielectric resonant antenna

The antenna design of ground penetrating radar, partition radar and human contact microwave treatment equipment should consider the application scenarios and join the application scenarios together to design or simulate the calculation, so as to obtain the best application effect. In this paper, a circularly polarized dielectric antenna for contact microwave detection system is designed under the application background. The antenna operates at L band and is fed by stripline slot coupling. Circular polarization is achieved by unequal length cross coupling slits. The influence of the radiation background on the return loss, axial ratio and direction of the antenna is studied. The bandwidth of the object and VSWR<2 is simulated. The simulation result is 16.6%, and the measured result is 29.7%.