Design of ultra-wideband TEM horn antenna for life detection

Abstract

A TEM horn antenna that can be used for ultra-wide spectrum life detection is designed. Through the circular arced horn arm, the end structure and the resistance composite load, and the feeding port add reflector, the antenna size is effectively reduced to half a meter. The simulation results show that the designed antenna has a voltage standing wave ratio less than 2 in the range of 0.175~4GHz. The bandwidth ratio is 22.86:1, and the gain is greater than 10dB above 1.5GHz. The designed antenna has no curved surface structure and is composed of straight planes. The structure is simple and easy to manufacture. It has the characteristics of ultra-wideband, high gain, and strong directional radiation.