A 433-MHz Compact Inverse Class-F Rectifier for Biomedical Wireless Power Transmission
- Authors
- Nguyen, Dang-An; Bui, Gia Thang; Nam, Hyungseok; Kim, Yanghyun; Seo, Chulhun
- Issue Date
- Jun-2023
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Biomedical wireless power transfer (WPT); class F-1 operation; fundamental matching; rectifiers; resonators
- Citation
- IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS, v.33, no.6, pp.759 - 762
- Journal Title
- IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
- Volume
- 33
- Number
- 6
- Start Page
- 759
- End Page
- 762
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/44181
- DOI
- 10.1109/LMWT.2023.3248079
- ISSN
- 2771-957X
- Abstract
- This letter presents a novel implementation of inverse class-F (class-F-1) rectifier based on lumped elements for biomedical wireless power transfer (WPT) at 433 MHz. Specifically, in order to reshape the diode current and voltage according to the class-F-1 waveform, a parallel LC resonator is deployed at the diode anode as a band-stop filter to provide infinite impedance for the second harmonic. Meanwhile, the third harmonic is terminated with zero impedance by a series LC network at the diode cathode side where its quality factor is also controlled to facilitate the fundamental matching. A prototype is fabricated and measured for verification showing that the peak power conversion efficiency (PCE) is achieved at 72.8% with an input power of 5 dBm. Also, the proposed rectifier exhibits PCE > 50% within a wide dynamic range of 22.5 dB and a compact size of 13 x 7 mm(2), which indicates an advantageous performance over the other existing designs with similar diode and frequency.
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