面向超短波接收机射频前端的电磁脉冲效应仿真与效应分级方法

针对接收机射频前端在电磁脉冲环境作用下的电磁损伤过程模拟问题，以超短波接收机为具体研究对象，基于超外差式接收机电路功能模型，采用Verilog-a和SPICE网表联合建模方法，建立了射频前端低噪声放大器（LNA）电磁脉冲效应仿真模型(Extended LNA Model)，并通过S参数仿真和瞬态仿真验证了LNA电磁脉冲效应模型具备正常功能仿真能力；为验证该模型的电磁脉冲损伤模拟能力，以标准电磁脉冲波形作为激励，以偶极子天线作为简化的天线前门耦合通道，在不同强度电磁脉冲作用下，接收机中频电路信号输出表现出了无影响、干扰、损毁的电磁脉冲效应过程，说明了建模方法的有效性；最后以EMP-天线耦合电压峰值作为阈值指标，分析得到了超短波接收机不同电磁脉冲效应等级对应的电压峰值阈值数据。

Electromagnetic pulse effect simulation and rating of RF front-end of super-heterodyne receiver

A co-simulation method using Verilog-a and circuit netlist is adopted for modeling and simulating the electromagnetic pulse (EMP) effects of RF front-end. The low-noise amplifier (LNA) within the RF front-end is modeled via Verilog-a, which is then extended to include the damage effect due to EMP. A standard yet simplified RF front-end of super-heterodyne receiver is constructed using the extended LNA model. The results of S-parameter simulation and transient simulation show that the front-end itself and the extended LNA model can be used to simulate the normal operational functionalities of the receiver. For verifying the extended LNA model’s capability that it can be used to simulate the normal, disturbance and damage effects due to EMP environment, an EMP-dipole antenna coupling channel is modeled via equivalent circuit, the output voltage signals of the circuit are simulated with different EMP-dipole antenna coupling voltage signals as the inputs. In the paper, the EMP effects are categorized into three different levels: non-effect, disturbance, and damage. The corresponding peak voltage thresholds are identified for the RF front-end of super-heterodyne receiver.