吸波材料反射系数测量误差仿真分析

Simulation Analysis of Reflection Coefficient Measurement Error of Absorbing Material

为探讨反射系数拱形测试法中拱形架半径、天线增益对吸波材料反射系数测量结果的影响,利用CST仿真软件,分析6~7 GHz频段内不同拱形架半径及喇叭天线增益、有/无理想地面反射时吸波材料反射系数测量值及测量误差的变化趋势。结果表明:若收发天线间经过吸波材料反射的路径总长度满足远场条件,半径小的拱形架、高增益天线得到的吸波材料反射系数测量误差稍小。测量吸波材料反射系数时建议选择半径小的拱形架、高增益天线。

In order to study the influence of the radius of the arch frame and the antenna gain on the measurement results of the reflection coefficient of the absorbing material,CST simulation software was used to analyze the variation trend of reflection coefficient and measurement error of absorbing material in the 6~7 GHz band with different arch frame radius and horn antenna gain,with or without ideal ground reflection.The results show that if the total length of the path reflected by the absorbing material between the transmitting and receiving antennas meets the far-field condition,the measurement error of the absorbing material reflection coefficient of the arch frame with small radius and the high gain antenna is slightly smaller.When measuring the reflection coefficient of absorbing material,it is suggested to select the arch frame with small radius and high gain antenna.