Near-field Loop antenna for the UHF RFID reader

Author

P. Yang
Y. Li
Lijun Jiang, Missouri University of Science and TechnologyFollow
F. Yang

Abstract

A loop antenna for near field readers is proposed. Through periodic interdigital capacitors, the phase of the current on the loop is compensated and kept in phase. Hence, a loop with a perimeter of one wavelength at 900 MHz achieves a uniform near magnetic field distribution inside the loop. A novel method is proposed to evaluate the performance of the coplanar waveguide (CPW) to coplanar stripline (CPS) transition, which is used as a balun for the feeding network in this paper. This loop antenna has a 70 MHz operating bandwidth and 12 cm maximum reading range when the output power is 24 dBm, which is suitable for most near field radio frequency identification (RFID) applications.

Recommended Citation

P. Yang et al., "Near-field Loop antenna for the UHF RFID reader," Journal of Electronic Science and Technology, vol. 9, no. 3, pp. 256 - 260, Journal of Electronic Science and Technology, Jan 2011.

Department(s)

Electrical and Computer Engineering

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2024 The Authors, All rights reserved.

Publication Date

September, 2011