Millimeter-Wave Dual-Band Dual-Polarized Shared-Aperture Antenna for Satellite Communication Applications

A millimeter-wave dual-band dual-polarized shared-aperture antenna for satellite communication applications is proposed in this study. A low-band (LB) dielectric resonator element is placed on top of a high-band (HB) patch element in the proposed antenna. The LB unit's radiator uses a non-metallic cube dielectric resonator to minimize the impact of LB elements on HB element radiation performance, allowing radiation from HB elements to flow through LB elements without degradation. A dual-band dual-polarized shared-aperture antenna working at 25.87-28.09 GHz (LB) and 28.44-32.07 GHz (HB) is constructed and simulated. The proposed antenna has a lower profile coverage of only 1.143 mm (0.103 λ L , λ L is the working wavelength at the center frequency of LB).