Compact circularly polarized microstrip ring antenna using capacitive coupling structure for RFID readers
Wu, Shiji; Yuan, Jiade; Chen, Jiangcheng; Li, Yujie (2020-02-13)
S. Wu, J. Yuan, J. Chen and Y. Li, "Compact Circularly Polarized Microstrip Ring Antenna Using Capacitive Coupling Structure for RFID Readers," in IEEE Access, vol. 8, pp. 32617-32623, 2020, doi: 10.1109/ACCESS.2020.2973719
© The Authors 2020. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see http://creativecommons.org/licenses/by/4.0/.
https://creativecommons.org/licenses/by/4.0/
https://urn.fi/URN:NBN:fi-fe2020050625424
Tiivistelmä
Abstract
This paper presents a compact circularly polarized microstrip antenna for radio frequency identification (RFID) readers. The dimensions of the proposed antenna are reduced by etching a cross slot in the radiation patch and loading four grounded coupling patches on the four corners of the radiation patch. An inverted Z-shaped coupling feedline is used to realize circularly polarized operation. The measured -10 dB |S11| bandwidth, 3-dB axial ratio bandwidth and maximum gain are 872–1095 MHz, 888–933 MHz, and 5.52 dBi, respectively, at 922 MHz frequency. The overall dimension of the proposed antenna is 0.36 λ g X 0.36 λ g X 0.05 λ g (λ g is the guide wavelength at the center frequency of 915 MHz). The proposed antenna has small size with good overall performance and is suitable for compact RFID devices.
Kokoelmat
- Avoin saatavuus [34150]
