BROADBAND DESIGN OF PLANAR CIRCULARLY POLARIZED ANNULAR-RING ANTENNA FOR RFID APPLICATIONS | Zendy

JuiHan Lu | Zendy; Shin-Chiang Lin | Zendy

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BROADBAND DESIGN OF PLANAR CIRCULARLY POLARIZED ANNULAR-RING ANTENNA FOR RFID APPLICATIONS

Author(s) -

JuiHan Lu,

Shin-Chiang Lin

Publication year - 2017

Publication title -

progress in electromagnetics research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.245

H-Index - 33

ISSN - 1937-6480

DOI - 10.2528/pierl17022701

Subject(s) - broadband , planar , optics , turnstile antenna , circular polarization , ring (chemistry) , antenna (radio) , telecommunications , coaxial antenna , physics , engineering , microstrip antenna , computer science , chemistry , computer graphics (images) , organic chemistry , microstrip

By introducing the Wilkinson divider and dual L-shaped strips as a feeding network, broadband design of planar circularly polarized (CP) annual-ring antenna for ultra-high frequency (UHF) RFID system is proposed and experimentally studied. The proposed broadband CP antenna can provide the impedance bandwidth (RL = 10 dB) of about 246MHz (25.0% @ 985MHz) and the 3 dB axial-ratio (AR) bandwidth of about 180MHz (19.5% @ 925MHz) to meet the worldwide UHF RFID band (860 ∼ 960MHz). Meanwhile, with unidirectional pattern in the XZand Y Z-planes, the measured peak gain and radiation efficiency are about 7.7 dBic and 70% across the operating band, respectively.

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