Dual-Band Aperture-Shared Antenna Array with Low Blockage Effect

A dual-band dual-polarized aperture-shared antenna array with low blockage effect is proposed. The proposed dual-band array consists a low-band (LB) element and a $4\times 4$ high-band (HB) antenna array. The LB element is located at the center of the HB array which is shielded under the LB element radiator. In the normal case, strong blockage effect from the LB on HB elements would exists. By adding split ring resonators (SRRs) along the LB radiator, the LB element scattering in the high-band can be suppressed. As a result, the blockage effect of the low scattering LB element on the HB array is indistinct. The proposed blockage reduction method is suitable for multi-band aperture-shared antenna array.