Efficiency-enhancement of 2.45-GHz energy harvesting circuit using integrated CPW-MS structure at low RF input power

Mohamed M. Mansour, Haruichi Kanaya

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

This paper looks into the underlying RF energy harvesting issues at low input ambient power levels below 0 dBm where efficiency degradation is severe. The proposed design aims to improve the rectenna sensitivity, efficiency, and output DC power. In the same manner, we are using a straightforward and compact size rectenna design. The receiving antenna is a coplanar waveguide (CPW) slot monopole antenna with harmonic suppression property and a peak measured gain of 3 dBi. Also, an improved antenna radiation characteristics, e.g radiation pattern and gain covering the desired operating band (ISM 2.45 GHz), is observed. The rectifier is a voltage doubler circuit based on microstrip (MS) structure. Two architectures of rectenna were carefully designed, fabricated and tested. The first layout; antenna, and rectifier were fabricated separately and then connected using a connector. The peak efficiency (40% at −5 dBm) achieved is lower than expected. To improve the efficiency, a high compactness and simple integration between antenna and rectifier are achieved by using a smooth CPW-MS transition. This design shows improved conversion efficiency measurement results which typically agree with the simulation results. The measured peak conversion efficiency is 72% at RF power level of −7 dBm and a load resistance of 2 kΩ.

元の言語英語
ページ(範囲)399-407
ページ数9
ジャーナルIEICE Transactions on Electronics
E102C
発行部数5
DOI
出版物ステータス出版済み - 5 1 2019

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Coplanar waveguides
Energy harvesting
Integrated circuits
Conversion efficiency
Antenna radiation
Antennas
Receiving antennas
Monopole antennas
Slot antennas
Directional patterns (antenna)
Degradation
Networks (circuits)
Electric potential

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

これを引用

Efficiency-enhancement of 2.45-GHz energy harvesting circuit using integrated CPW-MS structure at low RF input power. / Mansour, Mohamed M.; Kanaya, Haruichi.

:: IEICE Transactions on Electronics, 巻 E102C, 番号 5, 01.05.2019, p. 399-407.

研究成果: ジャーナルへの寄稿記事

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