An X-band parabolic antenna based on gradient metasurface

Abstract

Improving microwave antenna gain and bandwidth with phase compensation metasurface AIP Advances 5, 067152 (2015) We present a novel parabolic antenna by employing reflection gradient metasurface which is composed of a series of circle patches on a grounded dielectric substrate. Similar to the traditional parabolic antenna, the proposed antenna take the metasurface as a "parabolic reflector" and a patch antenna was placed at the focal point of the metasurface as a feed source, then the quasi-spherical wave emitted by the source is reflected and transformed to plane wave with high efficiency. Due to the focus effect of reflection, the beam width of the antenna has been decreased from 85.9• to 13• and the gain has been increased from 6.5 dB to 20.8 dB. Simulation and measurement results of both near and far-field plots demonstrate good focusing properties of the proposed parabolic antenna. C 2016 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license

A High-Performance Transmitarray Antenna with Thin Metasurface for 5G Communication Based on PSO (Particle Swarm Optimization)

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“…9 A single layer of RA using eight discrete phase states (3-bit) has been designed using an easy design method of RA, but with the sacrifice of radiation efficiency. 10 A transmitarray (TA) antenna contains a flat array with different status of elements on it, like different sizes or rotated angle, and a feed source in the virtual focal point. [11][12][13][14][15][16][17][18] The elements at different positions on TA have different transmission phase and magnitude, and after welldesigned, a beam focusing phenomenon will occur in the main beam direction when the array is illuminated by a feed antenna, and this focusing effect is a great improvement of antenna's gain.…”

Metasurface cavity antenna for broadband high‐gain circularly polarized radiation

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