Based on successful designs and simulations in CST Microwave Studio and ANSYS HFSS, an X-band array of 4 by 4 patches has been manufactured. Improvements in XPD respect to a repeated feeding scheme are significant and in excess of 30 dB. To this end, a feed rotation technique is implemented via bi-axial imaging of the feeding probes for each logical sub-array of 2 by 2 elements. However, relatively high levels of cross-polarization are to be expected in a patch array and therefore counteracted with specific designs. A planar dual-polarized patch antenna array featuring low cross-polarization is proposed to meet these requirements via a simple implementation of imaged feeding and candidates as a cost-effective electronically steerable array for short-range X-band weather radars. Meaningful dual-polarized radar estimations suitable for radar meteorology require a cross-polarization discrimination (XPD) and isolation (XPI) in excess of 30 dB to reach a differential reflectivity accuracy lower than 0.1 dB. Galvis Salzburg, Carlos (graduation committee) Vizcarro Carretero, Marc (TU Delft Electrical Engineering, Mathematics and Computer Science) A X-Band Patch Antenna Array With Low Cross-Polarization: For Weather Radar Applications
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