A novel wideband cube resonator antenna with metasurfaces

Abstract

AbstractA novel wideband cube resonator antenna (CRA) composed of metasurfaces is proposed in this letter, which can be applied to an active integrated antenna system. The resonant region of the CRA is formed by six metasurfaces of 4 × 4 arrays. The six surfaces can be equivalent to ideal electric walls. With the improved feeding slot, the dominant mode TE1δ1 and high‐order mode TE1δ3 are effectively excited, which enables a wideband and high gain performance for the CRA. A prototype of the antenna is fabricated and measured to verify the antenna design principle. The antenna has a measured impedance bandwidth of 17.0% (4.42–5.24 GHz) and a peak gain of 8.51 dBi, and good agreement between the simulated results and measured results is obtained. The proposed CRA shows resonant mode and radiation performance similar to those of traditional dielectric resonator antennas, which provides a new technique for the design of resonator cavity antennas.