High-Gain Metasurface in Polyimide On-Chip Antenna Based on CRLH-TL for Sub-Terahertz Integrated Circuits

Alibakhshikenari, Mohammad, Virdee, Bal S., See, Chan H. ORCID: 0000-0001-8439-7321, Abd-Alhameed, Raed A., Falcone, Francisco ORCID: 0000-0002-4911-9753 and Limiti, Ernesto (2020) High-Gain Metasurface in Polyimide On-Chip Antenna Based on CRLH-TL for Sub-Terahertz Integrated Circuits. Scientific Reports, 10 (1). p. 4298. ISSN 2045-2322

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Abstract

This paper presents a novel on-chip antenna using standard CMOS-technology based on metasurface implemented on two-layers polyimide substrates with a thickness of 500 μm. The aluminium ground-plane with thickness of 3 μm is sandwiched between the two-layers. Concentric dielectric-rings are etched in the ground-plane under the radiation patches implemented on the top-layer. The radiation patches comprise concentric metal-rings that are arranged in a 3 × 3 matrix. The antennas are excited by coupling electromagnetic energy through the gaps of the concentric dielectric-rings in the ground-plane using a microstrip feedline created on the bottom polyimide-layer. The open-ended feedline is split in three-branches that are aligned under the radiation elements to couple the maximum energy. In this structure, the concentric metal-rings essentially act as series left-handed capacitances CL that extend the effective aperture area of the antenna without affecting its dimensions, and the concentric dielectric rings etched in the ground-plane act as shunt left-handed inductors LL, which suppress the surface-waves and reduce the substrates losses that leads to improved bandwidth and radiation properties. The overall structure behaves like a metasurface that is shown to exhibit a very large bandwidth of 0.350–0.385 THz with an average radiation gain and efficiency of 8.15dBi and 65.71%, respectively. It has dimensions of 6 × 6 × 1 mm3 that makes it suitable for on-chip implementation.

Item Type: Article
Additional Information: Licence for this article: https://creativecommons.org/licenses/by/4.0/
Uncontrolled Keywords: Article, /639/166/987, /639/301/1005/1007, article
Subjects: T Technology > T Technology (General)
Divisions: School of Engineering
SWORD Depositor: JISC Publications Router
Depositing User: JISC Publications Router
Date Deposited: 21 Jan 2021 10:25
Last Modified: 21 Jan 2021 10:25
Identification Number: 10.1038/s41598-020-61099-8
URI: http://ubir.bolton.ac.uk/id/eprint/2858

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