基于SEMBA的天线对高频辐射场的电磁耦合效应仿真

Simulation of Electromagnetic Coupling Effect of Antenna on High Frequency Radiation Field Based on SEMBA

本研究的目的是获得天线附近给定设备内部可能引起的电磁干扰的预估,从而优化天线的设计参数,并获得天线附近导线中感应电流传递函数的估计,该感应电流可能对连接的设备造成干扰。本研究采用SENMA电磁仿真软件,模拟了由喇叭和波导转换器组成的天线在受到外部电磁场作用而激发出的电场强度和电流密度。对于给定的激励,该波同时到达两个线探针并产生感应电流,大约为微安的十分之一。电探针显示电场在波导内部大得多,而在天线前面传输很少的能量,这可能是由于不同组件之间的过渡阻抗不匹配。对于壁面较薄的区域,固体内部的感应电流亦较大。

The purpose of this study is to obtain the estimation of electromagnetic interference caused by the antenna to the given equipment nearby,so as to optimize the design parameters of the antenna,and obtain the estimation of the induced current transfer function in the conductor near the antenna,which may interfere with the connected equipment.In this study,SENMA electromagnetic simulation software is used to simulate the electric field intensity and current density excited by the antenna composed of horn and waveguide converter under the action of external electromagnetic field.For a given excitation,the wave reaches two line probes at the same time and produces induced current,which is about 1/10 of microampere.The electric probe shows that the electric field is much larger in the waveguide and little energy is transmitted in front of the antenna,which may be due to the mismatch of the transition impedance between different components.For the region with thin wall,the induced current in the solid is also large.