车载天线间耦合干扰特性分析

针对车载天线间耦合干扰问题,通过理论、实验、仿真的方式进行了全面、深入的分析与验证。首先,基于矩量法和快速多极子方法,通过将近场耦合转化成多端网络的功率传输,建立了耦合度的计算模型。接着,针对近场区耦合的特点,提出了采用间接测试法构建耦合度实验平台,并引入了三维电磁仿真软件对理论分析与实际测试结果进行比较。实例分析表明了模型的准确性和耦合干扰的严重性(可超过100 d B),为进一步研究共址干扰缓解与抑制提供了理论依据。

Analysis of Coupling Interference between Vehicular Antennas

Aiming at the problem of coupling interference (CI) between vehicular antennas, a comprehensive and in-depth analysis is conducted which adopts theoretical, experimental and simulation methods. Firstly, on the basis of the moment method (MOM) and the fast multipole method (FMM), a coupling computation model is established through transforming near-field coupling to power transmission of multiterminal network. For the characteristic of near-field coupling, a coupling experimental platform is constructed which adopts indirect testing method. Three-dimensional electromagnetic simulation software is introduced to compare the theoretical analysis and actual test results. Example analysis shows that the accuracy of the model and the severity of the CI (more than 100 dB), which provides a theoretical basis for further research on cosite interference relief and suppression.