A filtering antenna array based on multimode resonator

In this paper, a filtering antenna array with multimode is designed, manufactured and measured. The antenna is based on the co-design of stacked patches and stub-loaded resonators (SLR) to achieve efficient integration, rendering a four-order filtering response. Two radiation nulls respectively at the two edges of the operating band are achieved by controlling the coupling strength between the stacked patches and the stub-loaded resonators, which enhance the out-of-band suppression levels and the skirt selectivity of the filtering antenna.