New Kind of Mono-pulse Radar System Based on Virtual Polarization Filtering Technology

摘要

For the mono-pulse radar, it is a critical problem to countermeasure against the active and passive electronic interferences effectively. Some kinds of interferences are difficult to be effectively suppressed in time domain, frequency domain for single polarization and low resolution radar. A new kind of radar system based on the virtual polarization filtering technology is studied in this paper, which can notably improve the anti-jamming ability of a radar system. The virtual polarization filtering is that the polarization response of the antenna is simulated in the signal processor and the polarization filtering is carried out through digital technology. Firstly the theorem and structure of this dual polarization mono-pulse radar is given. Secondly an adapted polarization filtering algorithm is studied and the theorem of the algorithm and the polarization parameter estimation are discussed. Finally the effects on the angle measurement caused by the differences in amplitude and phase between the RF channels are analyzed and the simulations are performed. The research results demonstrated that the polarization filtering technology is an effective method to suppress some kinds of interferences and easy to realize in engineering.