Optimization and experiment of HPM UWB dual-reflector antenna

The HPM UWB dual-reflector antenna has been optimized by Taguchis method, and simulated by FEKO software. The radiation efficiency, reflectance and high voltage insulation have been considered. The antenna reflectance was decreased by increasing the thickness of TEM horn plates. The simulation result shows that the VSWR of combined feeding horn at 800 MHz-1.25 GHz decreases from 3.5 to no more than 1.5.The electric field of screws which connect the sub-reflector and insulation nylon box is decreased by70% by optimizing the structure of sub-reflector and insulation box. The antenna can be fed with 81 GW UWB pulse without high power breakdown. The radiation field-range product has been improved by .2 times. The ratio of the radiation field-range product and source voltage reaches 11. The high power antenna experiments have been conducted. The experiment results verified that the high power capacitance of antenna is more than 30 GW, the field-range product exceeds 8 MV, the spectrum of radiation is from 182 MHz to 1.69 GHz, and the 3 dB widths of power of H- and E-plane of radiation are 2.35 and 2.27 respectively.