Flexible meta-patch rectenna array for energizing low-power wearable medical sensors

Ahmad, Mohd Yazed and Alkhalaf, Hussein Yahya and Ramiah, Harikrishnan and Hossain, A K M Zakir and Azam, S M Kayser and Thiha, Aung (2024) Flexible meta-patch rectenna array for energizing low-power wearable medical sensors. IEEE Access, 12. pp. 121570-121585. ISSN 2169-3536

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Abstract

This article presents a low-cost 2× 2 metasurface-based rectenna array operating at the 2.45 GHz industrial, scientific, and medical (ISM) band, designed to power low-power wearable medical sensors (WMS). The proposed antenna is a novel textile-based metasurface interlayer patch (meta-patch) antenna fabricated on a felt fabric substrate, which replaces the conventional ground plane with a grounded metasurface consisting of a 3× 3 unit cell array. A single excitation port is used for both the patch antenna and the metasurface to improve gain, efficiency, and bandwidth. The meta-patch antenna achieved a high gain of 7 dB, an efficiency of 77%, and an enhanced bandwidth of 120 MHz. The rectifier employs a seven-stage Cockcroft-Walton Voltage Multiplier (CWVM) topology, fabricated on a rigid substrate. To evaluate the performance of the meta-patch rectenna array and the effect of adding more elements, the proposed meta-patch rectenna was tested in single-element, 2× 1 array, and 2× 2 array configurations under continuous RF power. The single-element, 2× 1 rectenna array, and 2× 2 rectenna array achieved power conversion efficiencies (PCE) of 52%, 53%, and 56%, with DC output powers of 414μ W, 429μ W, and 450μ W, respectively, at an input power of -1 dBm. The results demonstrate the potential of the proposed rectenna arrays for efficiently energizing low-power WMS.

Item Type:	Article
Uncontrolled Keywords:	Cockcroft-walton rectifier, Meta-patch rectenna array, Meta-patch textile antenna, Metasurface-based antenna, RF energy harvesting, Seven-stage rectifier, Textile rectenna array, Wearable medical sensors, Wearable rectenna array
Divisions:	Faculty Of Electronics And Computer Technology And Engineering
Depositing User:	Sabariah Ismail
Date Deposited:	06 Jan 2025 10:53
Last Modified:	06 Jan 2025 10:53
URI:	http://eprints.utem.edu.my/id/eprint/28188
Statistic Details:	View Download Statistic

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