基于空间功率合成的 200 kHz 重复频率高功率超宽带电磁脉冲辐射系统研制

Characterized by high peak power and wide frequency spectrum, the ultra-wideband (UWB) pulse can couple to the electronic equipment through various paths and cause interference or damage effects. In order to provide a high-power UWB pulsed simulation environment with a pulse-repetition rate (PRF) of hundreds of kHz, a high-PRF UWB electromagnetic pulse radiation system with high peak effective potential (rEp) is developed in this paper based on high-voltage and high-pulse-repetition-rate avalanche-transistorized pulsers and the space power synthesis method. In the design, the parallel “capacitor-transistor” structure and the “thermal conductive silicone-ceramic heat sink” structure are introduced to the pulser with the 30-level Marx circuit, thus its power capacity and operating PRF can be improved. Besides, the array arrangement is optimized to suppress the mutual coupling effect and improve the stability of the system. Experimental results show that the main technical parameters of the radiation system are as follows: in the time domain, the electric field waveform is a bipolar pulse, with a 50%-50% pulse width of 712 ps, and the maximum rEp of the system can reach 31.8 kV; In the frequency domain, its -10 dB bandwidth can cover 278 MHz to 2.43 GHz. The radiation system can operate with the PRF of 0.1~200 kHz. Additionally, its polarization direction is adjustable.