A Cavity-Backed Time-Domain Oval Dipole Antenna Designed for Application in Anti-stealth Radar

A high peak power time-domain oval dipole antenna is designed for application in anti-stealth radar and high-power microwave system. A kind of Blumlein Reflection Line (BRL) is integrated with photoconductive semiconductor switches (PCSS) to generate monocycle pulse with 2 ns pulse width to feed the antenna. Opposed structure is adopted to make the antenna able to withstand high peak voltage. An idea of impedance load and adding back cavity for antenna is further proposed to get directed radiation signal with desirable front-to-back (F/B) ratio. Antenna is optimized and simulated with computer simulation tool (CST) Microwave Environment software. The experimental results show the performance parameters of the antenna radiation electromagnetic pulse is with about 3:1 front-to-back ratio in the amplitude scale which is practically measured as 2.2:1.