volume | PIER Journals

Abstract

A broadband high gain antenna based on metasurface is proposed in this paper. The antenna consists of two layers, the lower layer is a square dielectric plate of 64 mm × 64 mm fed by aperture coupling which brings resonance frequencies closer to each other to improve bandwidth. The upper layer is a substrate of the same size, and the substrate is covered with a metasurface composed of 4×4 triangular slots. The impedance bandwidth is expanded by introducing the metasurface from 6.7% of the single-fed antenna to 23.8%, and the overall height of the antenna is 7 mm. The antenna is excited by an aperture coupled structure consisting of a microstrip line on the back and a narrow slot etched on the ground surface. The impedance bandwidth of the proposed antenna is 23.8%, ranging from 4.8 GHz to 6.1 GHz. The peak gain at 5.6 GHz is about 11.2 dB, and the gain is relatively stable throughout the entire operating frequency band. An antenna prototype is made, and the measurement results verify the design's correctness.

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Dr. Ting Wu

Dr. Jia-Wei Wang

Professor Mingjun Wang

Dr. Kai Zhang