负载天线作为电磁干扰传感器的天线因子分析

Analysis of Antenna Factor for Loaded Wire Antenna as EMI Sensor

阐述了不同负载线天线作为电磁干扰传感器的性能,发射模式的负载线天线主要应用于低频通信领域;然而,当应用这些天线作为电磁干扰传感器时,额外负载可能会造成入射电场的交叉极化;主要研究了负载天线作为EMI传感器时理想入射场与交叉极化场下天线因子的性能分析;脉冲基函数下的有限元法与点匹配技术相结合对天线表面的电流分布进行估值,从而得到电磁干扰传感器的天线因子。

This paper describes the performance of different loaded wire antennas （ e. g. , inverted L, T, I and C-shaped antennas） as electromagnetic interference （EMI） sensors. Loaded wire antennas in trans-mitting mode are widely used for low frequency communication. However, while using these antennas as EMI sensors, the extra loading is likely to introduce the reception of cross-polarized component of incident electric field and investigation on this has not yet been performed. This paper highlights the results of the initial investigation on the performance of these loaded antennas as EMI sensors in terms of the antenna fac- tor for the desired and cross-polarized component of incident electric field. The Method of Moments with Pulse basis function and Point-matching technique has been used to evaluate the current distribution on the antenna surface and hence the antenna factor is obtained.