Polarization isolation limits for highly integrated dual-polarized x-band multilayer antenna array applied in novel airborne polarimetric radar

This paper focuses on dual-polarized antenna array technology making use of low-profile composite panels to integrate antenna elements with their polarization feed circuits and array beamforming network. It emphasizes two key technical parameters: isolation between polarizations and high bandwidth performance. The paper presents how modern computational electromagnetic techniques enables high degree of antenna array integration. In such highly integrated antennas after manufacturing there is little possibility to correct feed network circuits. Measurement techniques are possible only with indirect approaches. The discussion is supported by results of state-of-the-art antennas for X-band operation on satellite, airborne and maritime platforms.