Abstract:
To improve the anti-HEMP ability of very high frequency wireless communication systems, based on the vulnerability analysis results in the early stage, the design principle and indicators of the combination of transient discharge and steady-state filtering were determined, and the protector module sample was produced. The 20 ns/500 ns conduction injected waveform was used to carry out the pulsed conducted injection test for the protector sample. Compared with the original protector, the peak of the residual current was reduced by 60%, the start time was shortened by 75%, the action time was shortened by 80%, and the low-frequency energy limit of the injected waveform below 20 MHz was increased by 1 order of magnitude. A VHF wireless communication system was taken as the test product, and the protection validation test was carried out. The test illustrated that the residual current peak is controlled below 10 A, and the function and performance of the tested system are norm, which verifies the effectiveness of the designed protector module.