Aperture coupled QUAD EMC super patch

The stacked quad EMC super patch with probe feeding was first proposed in [1] and a number of design results for personal communication terminals were provided in [2]. It has wide bandwidth of stacked microstrip antennas and higher gain due to the radiation of subarray. On the other hand, aperture coupling[3] can reduce the interaction between the antenna and feeding network, and the feed can be placed at a symmetric position to suppress cross polarization[4].