Ultra-thin single-layer transparent geometrical phase gradient metasurface and its application to high-gain circularly-polarized lens antenna

doi:10.1088/1674-1056/25/9/094101

Abstract A new method to design an ultra-thin high-gain circularly-polarized antenna system with high efficiency is proposed based on the geometrical phase gradient metasurface (GPGM). With an accuracy control of the transmission phase and also the high transmission amplitude, the GPGM is capable of manipulating an electromagnetic wave arbitrarily. A focusing transmission lens working at Ku band is well optimized with the F/D of 0.32. A good focusing effect is demonstrated clearly by theoretical calculation and electromagnetic simulation. For further application, an ultra-thin single-layer transmissive lens antenna based on the proposed focusing metasurface operating at 13 GHz is implemented and launched by an original patch antenna from the perspective of high integration, simple structure, and low cost. Numerical and experimental results coincide well, indicating the advantages of the antenna system, such as a high gain of 17.6 dB, the axis ratio better than 2 dB, a high aperture efficiency of 41%, and also a simple fabrication process based on the convenient print circuit board technology. The good performance of the proposed antenna indicates promising applications in portable communication systems.

Keywords: geometrical phase gradient metasurface circular polarization lens antenna

Received: 03 March 2016
Revised: 06 May 2016
Accepted manuscript online:

PACS:	41.20.Jb	(Electromagnetic wave propagation; radiowave propagation)
	29.27.Hj	(Polarized beams)
	84.40.Ba	(Antennas: theory, components and accessories)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61372034).

Corresponding Authors: Tang-Jing Li
E-mail: litangjing666@sina.com

Cite this article:

Tang-Jing Li(李唐景), Jian-Gang Liang(梁建刚), Hai-Peng Li(李海鹏), Ya-Qiao Liu(刘亚峤) Ultra-thin single-layer transparent geometrical phase gradient metasurface and its application to high-gain circularly-polarized lens antenna 2016 Chin. Phys. B 25 094101

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Ultra-thin single-layer transparent geometrical phase gradient metasurface and its application to high-gain circularly-polarized lens antenna

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