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PIER PIER B PIER C PIER M PIER Letters
2012-05-14
Switchable Distance-Based Impedance Matching Networks for a Tunable HF System
By
Wang-Sang Lee,

    Prof. Wang-Sang Lee

    Department of Electronic Engineering

    Gyeongsang National University

    South Korea

    Homepage

Han-Lim Lee,

    Dr. Han-Lim Lee

    Department of Electrical Engineering

    Korea Inst Sci & Technol

    South Korea

    Homepage

Kyoung-Sub Oh,

    Dr. Kyoung-Sub Oh

    Department of Electrical Engineering

    Korea Adv Inst Sci & Technol

    South Korea

    Homepage

Jong-Won Yu

    Prof. Jong-Won Yu

    Department of Electrical Engineering

    Korea Advanced Institute of Science and Technology

    Korea

    Homepage

Progress In Electromagnetics Research, Vol. 128, 19-34, 2012
doi:10.2528/PIER12041205
Abstract
Distance-based impedance matching networks for a tunable high frequency (HF) system are presented in this paper for the improved performance. The transmitting antenna for a HF system with an operating frequency of 13.56 MHz consists of a two-turn loop and three channel impedance matching networks corresponding to the distance of the receiving antenna. Each impedance matching network maximizes the system performance such as uniform power efficiency and reading range at specific distance between a transmitting and a receiving antenna. By controlling the distance-based matching networks, the power efficiency of the proposed antenna improves by up to 89% compared to the conventional antenna system with the fixed matching (FM) condition for distances, and the reliable reading range according to the impedance matching conditions is also increased. The proposed technique is applicable for near field communication (NFC), radio frequency identification (RFID), or wireless power transfer (WPT) devices.
Citation
Wang-Sang Lee, Han-Lim Lee, Kyoung-Sub Oh, and Jong-Won Yu, "Switchable Distance-Based Impedance Matching Networks for a Tunable HF System," Progress In Electromagnetics Research, Vol. 128, 19-34, 2012.
doi:10.2528/PIER12041205
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