NDLI: UHF pure near-field RFID reader antenna based on CSRR

Content Provider	IET Digital Library
Author	Zhang, Ning Zhu, Hua Li, Xiuping Gao, Gege Qi, Zhenguo
Abstract	An ultra-high frequency (UHF) travelling wave antenna based on complementary split ring resonator (CSRR) element is investigated in this study for pure near-field radio frequency identification (RFID) system. The proposed antenna consists of a T-type power divider, 180 ° phase shifter, two microstrip transmission lines ended with two 50 Ω resistors and the metal ground loaded CSRR elements. The CSRR elements are loaded on the metal floor corresponding to the minimum current points and middle of the two transmission lines. The CSRR elements resonate at the centre frequency and introduce coupling to enhance the magnetic field. The measured − 10 dB impedance bandwidth of the proposed antenna is 46 MHz (889–935 MHz), which covers the standards of Chinese and American bands. The reading regions for near-field tag, far-field tag and anti-metal tag are 400 × 200 × 10 mm 3 , 400 × 200 × 70 mm 3 and 400 × 200 × 60 mm 3 , respectively. The far-field gain is less than − 22 dBi, which makes the antenna suitable for the pure near-field application.
Starting Page	634
Ending Page	642
Page Count	9
ISSN	17518725
Volume Number	14
e-ISSN	17518733
Issue Number	Issue 7, Jun (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/14/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2019.0747
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2020-02-27
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Analogue Circuit Anti-metal Tag Centre Frequency Complementary Split Ring Resonator Element CSRR Element Far-field Gain Far-field Tag Frequency 46.0 MHz Frequency 889.0 MHz to 935.0 MHz Impedance Bandwidth Magnetic Field Metal Floor Metal Ground Microstrip Line Microstrip Transmission Line Microwave Circuit And Device Minimum Current Point Near-field Application Near-field Radio Frequency Identification System Near-field Tag Noise Figure 10.0 DB Power Divider Radiofrequency Identification RFID System Single Antenna Split Ring Resonator T-type Power Divider Transmission Line UHF Antenna UHF Phase Shifters UHF Pure Near-field RFID Reader Antenna UHF Resonator Ultra-high Frequency Ultra-high Frequency Travelling Wave Antenna Waveguide And Microwave Transmission Line Waveguide And Microwave Transmission Line Component
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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