A novel dual-band dual-polarized antenna design with high isolation and low crosspolarization is presented. An arc-coupled annular ring and a special coaxial-fed slot patch are employed as the radiating elements at lower and upper bands, respectively. Measurements show that the 10-dB impedance bandwidths reach 27.9% (1.66-2.19 GHz) and 18.4% (5.09-6.12GHz). The port isolation for both bands is better than 30dB. Moreover, stable and symmetrical radiation patterns at slanted ±45° polarizations are achieved, and the measured cross-polarization level is less than -32 dB within the above-mentioned bands.
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