Stack-layered Coupled-resonator Filtering Antenna

This paper introduces a new design methodology of filtering antenna (filtenna) based on the coupled radiating resonator structure. The idea is to integrate both filter and antenna as a single component with combined treatment. The patch antenna structure backed by substrate integrated cavity (SIC) resonator is effectively employed to comply with coupled-resonator filtering function. The proposed filtenna is a compact stack-layered array antenna module with the aim of highly integrated 5G massive array antenna application. A fourth-degree filtenna with operating frequency band of 27-29 GHz and return loss better than 22-dB is designed to verify the design method. The simulated results are in good agreement compared with those of analytical synthesis and circuit model.