RFID reader front-end having robust Tx leakage canceller for load variation

Won Gyu Lim; Seo Young Park; Wang Ik Son; Moon Que Lee; Jong Won Yu

doi:10.1109/TMTT.2009.2017308

RFID reader front-end having robust Tx leakage canceller for load variation

Won Gyu Lim, Seo Young Park, Wang Ik Son, Moon Que Lee, Jong Won Yu

School of Electrical and Computer Engineering

Korea Advanced Institute of Science and Technology

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

A novel front-end structure for ultra-high-frequency RF identification reader is proposed. The proposed front-end consists of a balanced coupler and four-port feed antenna system. The proposed balanced coupler structure has high transmit/receiver isolation feature and good insensitivity to load variations. The proposed four-port feed antenna system is applied for removing the coupling among antennas, which deteriorates the isolation. The proposed system is numerically analyzed and verified experimentally as well.

Original language	English
Article number	4811950
Pages (from-to)	1348-1355
Number of pages	8
Journal	IEEE Transactions on Microwave Theory and Techniques
Volume	57
Issue number	5
DOIs	https://doi.org/10.1109/TMTT.2009.2017308
State	Published - May 2009

Keywords

Antenna isolation
Directional coupler
Load impedance variation
Ultra-high-frequency (UHF) RF identification (RFID)

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10.1109/TMTT.2009.2017308

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abstract = "A novel front-end structure for ultra-high-frequency RF identification reader is proposed. The proposed front-end consists of a balanced coupler and four-port feed antenna system. The proposed balanced coupler structure has high transmit/receiver isolation feature and good insensitivity to load variations. The proposed four-port feed antenna system is applied for removing the coupling among antennas, which deteriorates the isolation. The proposed system is numerically analyzed and verified experimentally as well.",

keywords = "Antenna isolation, Directional coupler, Load impedance variation, Ultra-high-frequency (UHF) RF identification (RFID)",

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KW - Antenna isolation

KW - Directional coupler

KW - Load impedance variation

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RFID reader front-end having robust Tx leakage canceller for load variation

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Keywords

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