THE PREDICTION OF OPTIMAL POLARIZATION CHARACTER FOR A COATED TARGET IN RAIN CLUTTER AT MILLIMETER WAVES BAND.

As a target is immersed in the rain medium, its detection and identification become difficult due to that scattering wave from the target is mixed with echoes from raindrops. These clutters induce a strong effect in millimeter wave band and the signal-versus-clutter ratio (SCR) is therefore deteriorated at the receiving terminal. In this paper, Lagrange multiplier method combined with iteration method is proposed to calculate the optimal polarization characteristics both for the transmitting and receiving antennas of radar to improve SCR for the coated target in rain medium. As an application for the method, polarization status of antennas with best SCR both for co-polarization channel and cross-polarization channel are obtained utilizing the rain statistic data of Xi'an China. This hybrid method for calculating polarization parameters has applications in self-adaptive polarization matching of antenna in the electrical system. [ABSTRACT FROM AUTHOR]