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Journal of Zhejiang University SCIENCE C 1998 Vol.-1 No.-1 P.

http://doi.org/10.1631/FITEE.2200664


Novel design of a compact tunable dual band wireless power transfer (TDB-WPT) system for multiple WPT applications


Author(s):  Hany ATALLAH, Rasha HUSSEIN, Adel ABDELRAHMAN

Affiliation(s):  Electronics and Communications Engineering, Electrical Engineering Department Faculty of Engineering, South Valley University Qena 83523, Egypt; more

Corresponding email(s):   rasha.h.ahmed@eng.svu.edu.eg

Key Words:  Defected ground structure (DGS), Surface mounted (SMD), Tunable dual band wireless power transfer (TDB-WPT), Varactor


Hany ATALLAH, Rasha HUSSEIN, Adel ABDELRAHMAN. Novel design of a compact tunable dual band wireless power transfer (TDB-WPT) system for multiple WPT applications[J]. Frontiers of Information Technology & Electronic Engineering, 1998, -1(-1): .

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publisher="Zhejiang University Press & Springer",
doi="10.1631/FITEE.2200664"
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Abstract: 
In this paper we present the design and realization of a tunable dual band wireless power transfer (TDB-WPT) coupled resonator system. The frequency response of the tunable band can be controlled using a surface mounted (SMD) varactor. The transmitter (Tx) and the receiver (Rx) circuits are symmetric. The top layer contains a feed line with an impedance of 50 Ω. Two identical half rings defected ground structures (HR-DGS) are loaded on the bottom using a varactor diode. We propose a solution for restricted WPT systems working at a single band application according to the operating frequency. The effects of geometry, orientation, relative distance, and misalignments on the coupling coefficients were studied. To validate the simulation results, the proposed TDB-WPT system was fabricated and tested. The system occupies a space of 40 × 40 mm2. It can deliver power to the receiver with an average coupling efficiency of 98% at the tuned band from 817 to 1018 MHz and an efficiency of 95 % at a fixed band of 1.6 GHz at a significant transmission distance of 22 mm. The results of the measurements accord well with those of an equivalent model and the simulation.

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