CPW-Fed Wideband Circular Polarized Antenna for UHF RFID Applications
- Resource Type
- Authors
- Guen-Sik Kim; Sun-Woong Kim; Dong-You Choi
- Source
- International Journal of Antennas and Propagation, Vol 2017 (2017)
- Subject
- Engineering
Article Subject
business.industry
Axial ratio
020208 electrical & electronic engineering
Bandwidth (signal processing)
Electrical engineering
020206 networking & telecommunications
02 engineering and technology
lcsh:HE9713-9715
Microstrip
Radiation pattern
Optics
Ultra high frequency
0202 electrical engineering, electronic engineering, information engineering
lcsh:Cellular telephone services industry. Wireless telephone industry
lcsh:Electrical engineering. Electronics. Nuclear engineering
Electrical and Electronic Engineering
Antenna gain
Wideband
business
lcsh:TK1-9971
Ground plane
- Language
- ISSN
- 1687-5877
1687-5869
We propose a wide bandwidth antenna with a circular polarization for universal Ultra High Frequency (UHF) radio-frequency identification (RFID) reader applications. To achieve a wide 3 dB axial ratio (AR) bandwidth, three T-shaped microstrip lines are inserted into the ground plane. The measured impedance bandwidth of the proposed antenna is 480 MHz and extends from 660 to 1080 MHz, and the 3 dB AR bandwidth is 350 MHz and extends from 800 to 1155 MHz. The radiation pattern is a bidirectional pattern with a maximum antenna gain of 3.67 dBi. The overall size of the proposed antenna is 114 × 114 × 0.8 mm3.