Design of a dual-polarized Yagi-Uda antenna for the passive radar

A dual-polarized Yagi-Uda antenna for the passive radar is proposed. The antenna consists of two orthogonally installed Yagi-Uda antennas, each of them responsible for one polarization direction. The measurement result shows that the cross polarization discrimination between the two ports is more than 20dB. Antenna patterns for both polarization directions are the same due to the symmetric structure. Experiment for target detecting is conducted with the help of this dual-polarized antenna. Signal processing results show that SNR has been improved through the polarized enhancement technology. Thus Yagi-Uda antenna is a good choice to take into consideration when making dual-polarized antenna for passive radar.