Dual-Polarized Antenna Array Based on Substrate Integrated Gap Waveguide

A dual-polarized 1×4 slot antenna array is proposed supporting a millimeter-wave application. The dual-polarized antenna is excited with two microstrip lines based on Substrate Integrated Gap Waveguide. The simulated return loss for both ports achieves a sufficient matching level over 10% bandwidth and beyond 12 dBi Gain for both polarizations. The simulated isolation is better than 30 dB.