UHF-band RFID reader front-end architecture using ring-hybrid for near-field applications

Author

Park, Dong-Hoon ; Lim, Eun-Cheon ; Wei, Kai ; Park, Hye-Mi ; Min, Sang-Bo ; Yu, Jong-Won ; Lee, Moon-Que

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., Univ. of Seoul (UOS), Seoul, South Korea

fYear

2011

fDate

10-13 Oct. 2011

Firstpage

980

Lastpage

983

Abstract

In this paper, we present an antenna front-end architecture of UHF RFID reader dedicated for the near field applications. For the TX-RX isolation, the presented architecture adopts the sum-difference hybrid scheme which operates as a difference mode (or balun) and common-mode for TX and RX operations, respectively. The validity of the proposed architecture is demonstrated by applying to the smart shelf which identifies the books with UHF-tags. Compared with the conventional architecture using a directional coupler or a circulator, the test result shows the enhanced performance in sensitivity and multi-tagging ability.

Keywords

UHF antennas; UHF couplers; baluns; circulators; directional couplers; radiofrequency identification; TX-RX isolation; UHF tags; UHF-band RFID reader front-end; antenna front-end; balun; circulator; common-mode; difference mode; directional coupler; near-field applications; ring-hybrid; sum-difference hybrid scheme; Antenna measurements; Antennas; Circulators; Computer architecture; Directional couplers; Impedance matching; Radiofrequency identification; Near-field RFID reader; RFID front-end; Ring-hybrid; multi-tagging;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference (EuMC), 2011 41st European

Conference_Location

Manchester

Print_ISBN

978-1-61284-235-6

Type

conf

Filename

6101774