A nonuniform metasurface loaded circularly polarized differentially-fed antenna. Issue 8 (17th November 2019) - Qu, Meijun
ABSTRACT: This paper reports a novel differentially driven circularly polarized metasurface-based antenna with symmetrical and unidirectional radiation pattern. The introduction of metasurface could generate an additional resonance. The location of lower resonant frequency could be tuned independently by varying the length of cross gap in the ground plane while the higher resonant frequency is insensitive to this change. In addition, it is also proved that the circularly polarized performance could be better using the nonuniform metasurface than the uniform one. Furthermore, an antenna prototype has been fabricated to experimentally validate the principle and design approach. The measurements agree reasonably with the simulated ones.