Paper Info
Title
Antenna / On-Chip-Rectifier Co-Design Methodology for Micro-Watt Microwave Wireless Power Transfer
Abstract
In this paper, we propose a design method of determining the combination of antenna and on-chip-rectifier which has the lowest input power among various combinations for a rectenna (rectifier + antenna) for microwave wireless power transfer (MWPT). The proposed design flow has three steps, 1) simulate a sub-circuit including a rectifier and a given load to determine the equivalent input impedance $(R_{R})$ and the voltage amplitude at the input terminal $(V_{ic}^{pk})$ for each candidate of rectifiers, 2) draw contour plots for the input power $(P_{in})$ of the rectennas as a function of the antenna impedance $(R_{ant},X_{ant})$ using a linearized model of the system including an antenna, a rectifier and a load with the simulated R <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">R</inf> and $V_{ic}^{pk}$ for each candidate of rectifiers, and 3) find the combination of antenna and rectifier which has the lowest input power for the given load condition among various candidates by drawing antenna impedance loci for various antenna types on the contour plots for P <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">in</inf> . When the load requires $100\mu W$ at $1 V$ in case of $920 MHz$ as a demonstration, the proposed design flow predicted $P_{\text{in}}$ of $450\mu W$ with the combination of the loop antenna ($2\pi b/\lambda=0.34$, where b is $1.76 cm$ and $\lambda$ is 32.6 cm) and a voltage doubler. HSPICE showed P <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">in</inf> of 578$\mu W$ under the same condition, which indicates the effectiveness of the proposed design flow on finding an optimum combination of antenna and rectifier.
Year
DOI
Venue
2022
10.1109/MWSCAS54063.2022.9859394
2022 IEEE 65th International Midwest Symposium on Circuits and Systems (MWSCAS)
Keywords
DocType
ISSN
Wireless power transfer,IoT,rectenna,rectifier
Conference
1548-3746
ISBN
Citations 
PageRank 
978-1-6654-0280-4
0
0.34
References 
Authors
4
2
Name
Order
Citations
PageRank
Takuma Hashimoto100.34
Toru Tanzawa26614.08