2.4G天线的强电磁脉冲防护装置设计方法研究OA

Aiming at the problem that strong electromagnetic pulses cause damage to the receiver at the rear end of the antenna,based on the RF circuit design theory,the author uses the combination of theory and experiment to design a center frequency of 2 450 MHz and a bandwidth of 100 MHz through theoreti-cal calculations.The microstrip line band-pass filter with a loss of less than 1.5 dB is inserted in the passband,and the performance is simulated and optimized by HFSS software,and then the surge protec-tion device and the filter are combined to design a strong pulse protection circuit,and the S parameters of the protection circuit are simulated by the circuit software ADS(Advanced Design System),and finally the physical product is produced for testing.Experiments show that the designed electromagnetic pulse protection device in the 2 400-2 500 MHz frequency band,the absolute value of insertion loss is less than 5 dB,the absolute value of return loss is greater than 15 dB,the inrush current is 500 A,the RF back-end current is less than 1.3 A,and the current suppression ratio is greater than 50 dB,which can effectively discharge amplification current without affecting the normal operation of the antenna.The re-search results have certain reference value for the design of strong electromagnetic pulse protection of an-tennas.