A Novel Dual-Band Share Aperture Array Scheme with Sharing Feeding Ports for Bease Station Application

A novel share aperture dual-band array scheme is proposed in paper. Different from the traditional share aperture scheme, the low band antenna is integrated into the high band antenna to form a co-designed LB/HB array that shares common feeding ports. The 3×3 high-band array and a staggered low-band array is integrated into overall one. The share aperture array has working bands of 3.2-3.7 GHz and 4.9-5.54 GHz, respectively. The isolation of the array is 13.65 dB, respectively. The proposed array has a merit that the low-band antennas and high-band antennas have common feeding ports, and the radiation performance of HB array do not affected by LB radiators.