A new directional coupler for UHF RFID reader | Zendy

Wei Feng | Zendy; Shi X. W. | Zendy; Huang Q. L. | Zendy; Chen D. Z. | Zendy; Wang X. H. | Zendy

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A new directional coupler for UHF RFID reader

Author(s) -

Wei Feng,

Shi X. W.,

Huang Q. L.,

Chen D. Z.,

Wang X. H.

Publication year - 2008

Publication title -

microwave and optical technology letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.304

H-Index - 76

eISSN - 1098-2760

pISSN - 0895-2477

DOI - 10.1002/mop.23495

Subject(s) - hybrid coupler , ultra high frequency , power dividers and directional couplers , microstrip , stub (electronics) , microwave , magic tee , rat race coupler , electrical engineering , engineering , electronic engineering , acoustics , physics , telecommunications

A conventional microstrip directional coupler has poor isolation due to its unequal phase velocity between the even and odd modes. In this article, a compact dual‐stub microstrip directional coupler for the UHF RFID reader is proposed. The operating frequency band is 902–928 MHz. It is found that the coupler can obtain a good isolation of −65 dB at 920 MHz. Modeling and simulation results are also presented which are in good agreement with measurement data. © Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1973–1975, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23495

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