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Circularly polarized monopole slot antenna for UHF RFID reader
Author(s) -
Cao Rong,
Yu ShunChuan
Publication year - 2016
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.29758
Subject(s) - monopole antenna , ground plane , physics , ultra high frequency , microstrip antenna , optics , turnstile antenna , dipole antenna , antenna measurement , slot antenna , coaxial antenna , patch antenna , antenna (radio) , electrical engineering , engineering
ABSTRACT This article proposes a circularly polarized monopole slot antenna which is suitable for ultra‐high frequency (UHF) radio frequency identification (RFID) reader. In this antenna design, a meandering slot is being placed in the ground plane to produce good circularly polarized radiation characteristics, and the microstrip line feed can be adjusted to achieve good impedance matching. Measurement results showed that the 10‐dB return loss bandwidth of the antenna is 10.3% (0.857–0.95 GHz), and the 3‐dB axial ratio bandwidth of the antenna 7.4% (0.878–0.945 GHz). The maximum gain and efficiency of the antenna is 2.09 dBic and 76%, respectively. The overall antenna size is 120 × 80 × 0.8 mm 3 . © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:1102–1105, 2016