Citation

Muhammad, Surajo and Tiang, Jun Jiat and Bujang, Suhandi (2025) Design of an Ultra-Compact RF Rectifier for Enhanced Efficiency in Biotelemetry Wireless Power Systems. In: 22nd International Conference on Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology, ECTI-CON 2025, 20 May 2025 - 23 May 2025, Bangkok.

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Abstract

This paper presents a unique design for a high efficiency, ultra-compact RF rectifier. The rectifier incorporates a two-branch cell structure denoted as C1 and C2. These branches are integrated with a meandered line network (ML1 and ML2) for biomedical implants. The C1 structure includes a radial stub, while a series inductor is added to C1 and C2 for improved performance. The proposed rectifier is optimized to enhance power transfer efficiency over a frequency range of 1.28 to 1.52 GHz, making it particularly suitable for wireless power transfer in biomedical implants. Simulation results demonstrate a peak RF-to-DC power conversion efficiency (PCE) of 77.80% at an input power (Pin) of 4 dBm. Additionally, the design maintains RF-to-DC conversion efficiencies exceeding 25% at Pin levels of -20 dBm, underscoring its effectiveness in low-power conditions. Fabricated on an RT/Duroid substrate, the rectifier achieves a compact footprint of 7.8 mm × 9.3 mm and utilizes a single-series diode (SSrd) configuration. A sequential matching technique is implemented to achieve efficient performance over the desired frequency spectrum, ensuring a wide impedance bandwidth. This study highlights the potential of the proposed rectifier for wireless power transfer applications in biomedical implants, particularly in scenarios requiring the efficient utilization of ambient energy.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	Biotelemetry
Subjects:	Q Science > QH Natural history
Divisions:	Faculty of Engineering (FOE)
Depositing User:	Ms Rosnani Abd Wahab
Date Deposited:	30 Sep 2025 03:11
Last Modified:	30 Sep 2025 03:11
URII:	http://shdl.mmu.edu.my/id/eprint/14541

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