Broadband Dual-Polarized Stacked Patch Antenna with High Isolation

Abstract

Abstract. In this paper, a wideband dual-polarized stacked patch antenna at S-band with high port isolation is presented. By adopting the structure of H-shaped coupling slots placed in "T" configuration, the proposed antenna achieves dual polarizations and high port isolation, and the impedance bandwidth is significantly enhanced by the use of stacked structure. The antenna is designed, fabricated and measured. The measured return loss exhibits an impedance bandwidth (S11 < -10 dB) of over 31% at both ports. The isolation between two ports is better than 40 dB and cross-polarization discriminations in both E and H planes are better than 21 dB within the forward half-space over the entire band.