为研究车载天线系统电磁兼容性,在ANSA软件中建立全尺寸装甲车辆电磁仿真简化模型.基于广义S参数理论,给出收发天线间的电磁耦合度表达式.利用CST仿真分析了理想导体平面上收发天线对、装甲车辆车载收发天线间两种电磁耦合度.结果表明,天线间距减小,车载天线间的耦合度非线性变化,但基本呈增加趋势.收发天线工作于谐振频率62.5 MHz时,电磁耦合度最小,谐振频率附近出现两个电磁耦合度最大峰值.发射天线的3次谐波与接收天线的电磁耦合度较强.%In order to research the electromagnetic compatibility between vehicle -mounted antennas,the real model of an armored vehicle is simplified by ANSA,and the simplified model of the electromagnetic simulation is established by the real dimension of an armored vehicle in this paper. Based on a generalized theory of S-parameters,the formula of the electromagnetic coupling degree between transmitting and receiving antenna is given. For the perfect conductor plan and an armored vehicle,the EM coupling degrees between transmitting and receiving antenna are simulated by CST respectively. With the decrease of the interval between transmitting and receiving antenna,the EM coupling degrees between vehicle-mounted antennas are nonlinear and increased. The minimum of EM coupling degrees are at the resonance frequency of 62.5 MHz and the both maximum occurs nearby the resonance frequency,the EM coupling degrees are relatively larger between the transmitting antenna at the third harmonic frequency and the receiving antenna.
展开▼
