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author:

Yuan, J. (Yuan, J..) [1] | Wu, S. (Wu, S..) [2] | Chen, Z. (Chen, Z..) [3] | Xu, Z. (Xu, Z..) [4]

Indexed by:

Scopus

Abstract:

A compact low-profile square ring antenna with unidirectional radiation and dual circular polarization (CP) is proposed for uses in radio frequency identification (RFID) readers. A small size conducting plane are slotted and placed underneath the ring antenna as a reflector to achieve low profile and unidirectional radiation. A branch line coupler is meandered inside the ring radiator to save space and generate dual circular polarization. Four inverted L-shaped strips are introduced to overcome the negative effects of tight coupling between the radiator and reflector. The measured -10 dB impedance bandwidth of \vert S_{11}\vert , 3 dB axial ratio (AR) bandwidth and maximum gain are of 850-1060 MHz, 876-1084 MHz and 5.62dBi, respectively. The lowest measured gain values in RFID band of 900-930 MHz is 4.54dBi and the overall size is 0.31\,\,\lambda _{0} \times 0.31 \,\,\lambda _{0} \times 0.034 \,\,\lambda _{0} ( \lambda _{0} is denoted the wavelength at center frequency). The proposed antenna has not only the lowest profile but also the best overall performances. It is an excellent antenna that can be fitted where there is a limited space in RFID system. © 2013 IEEE.

Keyword:

circular polarization (CP); left-hand polarization (LP); lowprofile; radio frequency identification (RFID); right-hand polarization (RP); Ring antenna; slotted reflector

Community:

  • [ 1 ] [Yuan, J.]College of Physics and Information Engineering, Fuzhou University, Fujian, 350116, China
  • [ 2 ] [Wu, S.]College of Physics and Information Engineering, Fuzhou University, Fujian, 350116, China
  • [ 3 ] [Chen, Z.]College of Physics and Information Engineering, Fuzhou University, Fujian, 350116, China
  • [ 4 ] [Chen, Z.]Department of Electrical and Computer Engineering, Dalhousie University, Halifax, NS B3H 4R2, Canada
  • [ 5 ] [Xu, Z.]College of Physics and Information Engineering, Fuzhou University, Fujian, 350116, China

Reprint 's Address:

  • [Yuan, J.]College of Physics and Information Engineering, Fuzhou UniversityChina

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Source :

IEEE Access

ISSN: 2169-3536

Year: 2019

Volume: 7

Page: 128948-128955

3 . 7 4 5

JCR@2019

3 . 4 0 0

JCR@2023

ESI HC Threshold:150

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 13

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 2

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