Beamforming and Monopulse technique on sequentially-fed circularly-polarized ultra-wideband radar array

The paper describes how beamforming and monopulse techniques can be applied to an array of sequentially-fed, circular polarized, ultra-wideband array. By exploiting the same sequentially-fed antennas for beamforming and monopulse, we can achieve better target tracking, without increasing the antenna array size. The design equations of our proposed method, for the radar transceiver, are derived. To verify the design equations, a prototype radar transceiver is constructed, and the transmitted circularly polarized signals are measured, and compared with the equations. The ability of the array to accurately track radar target with monopulse technique is also demonstrated by measurements.