Investigation on loaded antenna

Abstract

A new loading method for planar pulse antennas to suppress the trailing effect and to enlarge the impedance bandwidth is presented. In the proposed method, resistances are loaded at the radiation terminal of tapered slot antenna where the loaded elements will slightly affect the main pulse and dramatically suppress the trailing pulse, and loaded elements joined by metal strips are directly connected to the radiation terminal, which will conduct most of the non-radiated energy into the loading tracks. Simulation results show that the loaded resistances can absorb currents which otherwise will be reflected at the radiation terminal to form trailing pulse, and connection of loading tracks in different radiators will improve reflection characteristics in lower frequency to enlarge the impedance bandwidth.