Efficiency improvement of the impulsive wireless power transmission through biomedical tissues by varying the duty cycle

Yu Lin Yang, Chin Lung Yang, Chi Lin Tsai, Chieh Sen Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

It is very challenging to improve the power conversion efficiency (PCE) in wireless power transmission (WPT), especially through the propagation channel of biological tissue. The received power for biomedical applications is usually very weak due to the security regulations of Specific Absorption Rate (SAR) and the propagation attenuation by biological tissues. So the input power (P IN) of the RF-DC rectifier is usually not high, and the optimal PCE cannot be achieved as conventional efficient rectifiers do. In this paper, we propose an impulsive technique to promote the PCE at a low input power level at 10 dBm and to optimize the performance by varying the duty cycles of the impulsive power waves. Therefore, the dc output voltage (Vout) and PCE can be effectively improved from 1.176 to 1.905 volt (62%) and from 13.83% to 36.29%, respectively. Furthermore, the wireless channels for such wideband power transmission techniques and the biological channel effects are investigated in this paper. Fundamental analysis is setup to predict the tissue attenuation loss. Through the measurements, we found that our proposed techniques can improve the Vout and PCE within the 10 mm thickness of biological tissues (pork) and supply more wireless power for biomedical implantable systems.

Original languageEnglish
Title of host publication2011 IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission
Subtitle of host publicationTechnologies, Systems, and Applications, IMWS-IWPT 2011 - Proceedings
Pages175-178
Number of pages4
DOIs
Publication statusPublished - 2011 Jul 14
Event2011 1st IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications, IMWS-IWPT 2011 - Kyoto, Japan
Duration: 2011 May 122011 May 13

Publication series

Name2011 IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications, IMWS-IWPT 2011 - Proceedings

Other

Other2011 1st IEEE MTT-S International Microwave Workshop Series on Innovative Wireless Power Transmission: Technologies, Systems, and Applications, IMWS-IWPT 2011
CountryJapan
CityKyoto
Period11-05-1211-05-13

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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