Ultrabroadband compact lens antenna with high performance based on a transmission gradient index medium

Jin Chen; Hongchen Chu; Yixing Huang; Yun Lai; Zhanwei Liu; Mingji Chen; Daining Fang

doi:10.1088/1361-6463/abddf9

Ultrabroadband compact lens antenna with high performance based on a transmission gradient index medium

Jin Chen, Hongchen Chu, Yixing Huang^*, Yun Lai, Zhanwei Liu, Mingji Chen^*, Daining Fang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

A gradient refractive index design strategy is proposed for a flat lens, which can transform a wavefront by rectifying the local transmission phase. The designed lens is composed of two types of low-loss dielectrics with subwavelength gradient periodic structure and manufactured by 3D printing and computer controlled machining. The measured results of the near and far field agree well with those of theoretical predictions and numerical simulations. It is demonstrated that this light-weight, low cost, compact lens antenna is highly directive (side lobes below -10 dB) and the incident plane waves are focused well with high focusing efficiency (above 80%) over an ultrabroadband frequency range with a bandwidth ratio of 138% (4-22 GHz). The demonstrated flat lens provides an alternative strategy for microwave communication, detection, and imaging applications.

Original language	English
Article number	175101
Journal	Journal Physics D: Applied Physics
Volume	54
Issue number	17
DOIs	https://doi.org/10.1088/1361-6463/abddf9
Publication status	Published - 29 Apr 2021

Keywords

highly efficient subwavelength focusing
transmissive gradient index medium
ultrabroadband highly directive emission

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10.1088/1361-6463/abddf9

Cite this

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title = "Ultrabroadband compact lens antenna with high performance based on a transmission gradient index medium",

abstract = "A gradient refractive index design strategy is proposed for a flat lens, which can transform a wavefront by rectifying the local transmission phase. The designed lens is composed of two types of low-loss dielectrics with subwavelength gradient periodic structure and manufactured by 3D printing and computer controlled machining. The measured results of the near and far field agree well with those of theoretical predictions and numerical simulations. It is demonstrated that this light-weight, low cost, compact lens antenna is highly directive (side lobes below -10 dB) and the incident plane waves are focused well with high focusing efficiency (above 80%) over an ultrabroadband frequency range with a bandwidth ratio of 138% (4-22 GHz). The demonstrated flat lens provides an alternative strategy for microwave communication, detection, and imaging applications.",

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author = "Jin Chen and Hongchen Chu and Yixing Huang and Yun Lai and Zhanwei Liu and Mingji Chen and Daining Fang",

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T1 - Ultrabroadband compact lens antenna with high performance based on a transmission gradient index medium

AU - Chen, Jin

AU - Chu, Hongchen

AU - Huang, Yixing

AU - Lai, Yun

AU - Liu, Zhanwei

AU - Chen, Mingji

AU - Fang, Daining

PY - 2021/4/29

Y1 - 2021/4/29

N2 - A gradient refractive index design strategy is proposed for a flat lens, which can transform a wavefront by rectifying the local transmission phase. The designed lens is composed of two types of low-loss dielectrics with subwavelength gradient periodic structure and manufactured by 3D printing and computer controlled machining. The measured results of the near and far field agree well with those of theoretical predictions and numerical simulations. It is demonstrated that this light-weight, low cost, compact lens antenna is highly directive (side lobes below -10 dB) and the incident plane waves are focused well with high focusing efficiency (above 80%) over an ultrabroadband frequency range with a bandwidth ratio of 138% (4-22 GHz). The demonstrated flat lens provides an alternative strategy for microwave communication, detection, and imaging applications.

AB - A gradient refractive index design strategy is proposed for a flat lens, which can transform a wavefront by rectifying the local transmission phase. The designed lens is composed of two types of low-loss dielectrics with subwavelength gradient periodic structure and manufactured by 3D printing and computer controlled machining. The measured results of the near and far field agree well with those of theoretical predictions and numerical simulations. It is demonstrated that this light-weight, low cost, compact lens antenna is highly directive (side lobes below -10 dB) and the incident plane waves are focused well with high focusing efficiency (above 80%) over an ultrabroadband frequency range with a bandwidth ratio of 138% (4-22 GHz). The demonstrated flat lens provides an alternative strategy for microwave communication, detection, and imaging applications.

KW - highly efficient subwavelength focusing

KW - transmissive gradient index medium

KW - ultrabroadband highly directive emission

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Ultrabroadband compact lens antenna with high performance based on a transmission gradient index medium

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