Alkhalaf, Hussein Yahya and Ahmad, Mohd Yazed 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, DOI https://doi.org/10.1109/ACCESS.2024.3452316.
Full text not available from this repository.Abstract
This article presents a low-cost 2x2 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 3x3 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, 2x1 array, and 2x2 array configurations under continuous RF power. The single-element, 2x1 rectenna array, and 2x2 rectenna array achieved power conversion efficiencies (PCE) of 52%, 53%, and 56%, with DC output powers of 414 mu W, 429 mu W, and 450 mu 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 |
|---|---|
| Funders: | Ministry of Education, Malaysia (FRGS/1/2020/TK0/UM/02/45 (FP124-2020)) |
| Uncontrolled Keywords: | Metasurfaces; Rectennas; Antenna arrays; Substrates; Sensor arrays; Patch antennas; Textile antennas; Energy harvesting; Wearable antennas; Wearable sensors; Medical devices; Biosensors; Cockcroft-Walton rectifier; meta-patch rectenna array; meta-patch textile antenna; metasurface-based antenna; RF energy harvesting; seven-stage rectifier; textile rectenna array; wearable rectenna array; wearable medical sensors |
| Subjects: | Q Science > QA Mathematics > QA75 Electronic computers. Computer science T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Faculty of Engineering > Biomedical Engineering Department Faculty of Engineering > Department of Electrical Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 03 Jan 2025 08:50 |
| Last Modified: | 03 Jan 2025 08:50 |
| URI: | http://eprints.um.edu.my/id/eprint/47070 |
Actions (login required)
 |
View Item |
