Differential time-domain single-antenna method for ultra-wide band antenna measurements

Antenna radiation can be experimentally investigated by using the single-antenna method that consists of a virtual transmission between the antenna under test and its image in a conducting reflector. This paper presents a time-domain approach of the single-antenna method for the characterization of ultra-wide band (UWB) antennas. A differential technique was considered in order to discriminate the reflected signal due to the antenna input mismatch, and the signal received by reflection on the conducting plate, respectively. Experimental and computed results are presented for two types of UWB antennas.