Mixed simulation of PCB circuit illuminated by high power microwave with different frequencies

This paper simulates the coupled signals on a PCB circuit, which includes a PIN limiter, generated by high power microwave (HPM) with different frequencies by using a hybrid simulation method. This hybrid method is based on the transient electromagnetic topology method and device/circuit mixed simulation. It realizes the hybrid simulation of fields, circuits, and devices. It can be employed to simulate the coupled signals on a PCB circuit within a shielding enclosure illuminated by HPM. This method is employed to obtain the coupled signals on the PCB circuit generated by HPM with the frequencies of 1 GHz, 1.25 GHz and 2.5 GHz. The coupled signal generated by 1 GHz HPM is the largest when the PCB circuit has no shielding enclosures. However, the coupled signal generated by 2.5 GHz HPM is the largest when the PCB circuit has its enclosure. The results show that the PIN limiter has a good protection effect when the coupled signal is large.