Broad-Band Substrate-Free Planar Metamaterial Lens Based on a Geometric Transformation of Polygon

Tianyu Pen; Bing Huang; Hao Sun; Xiaowei Sun; Lingyun Li

doi:10.1515/freq-2019-0017

Article

Broad-Band Substrate-Free Planar Metamaterial Lens Based on a Geometric Transformation of Polygon

Tianyu Pen , Bing Huang , Hao Sun , Xiaowei Sun and Lingyun Li

Published/Copyright: September 4, 2019

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From the journal Frequenz Volume 73 Issue 9-10

Abstract

A broad-band substrate-free planar metamaterial lens fed by a horn antenna is proposed. A geometric transformation of polygon is introduced in order to make gradient tuneable unit cells out of ordinary metamaterial structures. A circular lens with gradient epsilon along its surface is designed and fabricated based on the transform theory. Measurement results indicate that the proposed lens is capable of improving the gain of the horn antenna within the frequency band of 78–89 GHz which is more than doubled as comparing with existing substrate-free metamaterial lenses.

Keywords: gradient metamaterial; substrate-free lens; geometric transformation

Acknowledgements

This work is supported by National Natural Science Foundation of China (contracts No. 61731021).

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Received: 2019-02-05

Published Online: 2019-09-04

Published in Print: 2019-09-25

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Articles in the same Issue

https://doi.org/10.1515/freq-2019-0017

Keywords for this article

gradient metamaterial; substrate-free lens; geometric transformation