Wu Zhihang

Low-profile microwave lens antenna based on isotropic Huygens' metasurfaces

Abstract An isotropic electromagnetic (EM) lens based on Huygens metasurface is proposed for 28.0 GHz lens antenna design. The lens consists of a series of non-resonant and subwavelength metallic patterns etched on both sides of an ultrathin dielectric substrate. Both electric and magnetic responses are introduced to realize desired abrupt phase change and high-efficiency transmission for the secondary wavelets in the incident wavefront. Then, a substrate-integrated waveguide (SIW) fed patch antenna is combined with the lens as the primary feed to form a low-profile lens antenna system. The simulated and measured results coincide with each other, and demonstrate that the prototype realizes 8.8 dB∼12.6 dB gain increment and low side-lobe levels over the bandwidth of 26.7 GHz∼30.0 GHz. The novel design leads to a low-profile, light weight, and low-cost antenna solution in a wireless communication system.