volume | PIER Journals

Abstract

This paper presents a design method for circularly polarized metasurface antennas by integrating waveguide-fed metasurfaces with optical holography principles. Two interleaved linear slot elements on the metasurface top layer are excited by a reference wave from the feed, generating a circularly polarized beam. Simply adjusting the position of each slot element steers the beam in the desired direction. To enhance gain, metal vias are added around the antenna perimeter, reducing reference wave leakage. To validate this method, two 24 GHz circularly polarized holographic metasurfaces were simulated and experimentally characterized. Measurements show a 1.23 dB gain enhancement in the metasurface antenna with metal vias. Simulated and measured results validate the antenna's performance. This approach yields compact, low-profile antennas without requiring a separate feed network. Furthermore, the structure can be extended to create reconfigurable circularly polarized antennas, demonstrating significant potential in this field.

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Mr. Chunyu Liu

Dr. Chen Zhang

Dr. Xuwen Guo

Dr. Huayong Zou