A Multilayer PCB Dual-Polarized Radiating Element for Future SAR Applications

The design, manufacturing, and testing of a slot-coupled multilayer dual-polarized X-band radiating element is presented. The proposed architecture provides an isolation between polarization ports better than 34 dB over a 16% frequency band. The selected technology is particularly suitable for large-scale, low-cost, and high reliable manufacturing. This work has been carried out in the frame of a research program funded by the Italian Space Agency and aimed to the development of enabling technologies exploitable in next-generation spaceborne synthetic aperture radar (SAR) antennas.