Title :
A simple UHF RFID circularly-polarized reader antenna design
Author :
Lu, Y.-L. ; Cui, H.-R. ; Sun, X.-W. ; Xu, M. ; Yin, Y.-Z.
Author_Institution :
Hangzhou RFID Res. Center, Hangzhou, China
Abstract :
A simple UHF RFID circularly-polarized reader antenna is presented in this paper. Air-substrate patch antenna is used to design. Truncated patch structure and shorted posts are used to obtain circularly-polarized characteristic. Measured results show that the antenna with size of 254*254*18 mm, has an impedance bandwidth of 880-960 MHz for voltage standing wave ratio (VSWR) less than 1.5. Moreover, axial ratio (AR) with bandwidth of 906-928 MHz is under 3dB. A good agreement is achieved between simulated and measured results. The antenna is a good choice for UHF RFID applications.
Keywords :
UHF antennas; microstrip antennas; radiofrequency identification; UHF RFID applications; UHF RFID circularly-polarized reader antenna design; VSWR; air-substrate patch antenna; axial ratio; bandwidth 880 MHz to 960 MHz; bandwidth 906 MHz to 928 MHz; circularly-polarized characteristic; impedance bandwidth; radiofrequency identification; truncated patch structure; voltage standing wave ratio; Antenna measurements; Bandwidth; Patch antennas; Radiofrequency identification; UHF antennas; UHF measurements; UHF RFID; axial ratio; circularly-polarized characteristic; impedance bandwidth; truncated patch antenna;
Conference_Titel :
Electrical Design of Advanced Packaging and Systems Symposium (EDAPS), 2011 IEEE
Conference_Location :
Hanzhou
Print_ISBN :
978-1-4673-2288-1
Electronic_ISBN :
2151-1225
DOI :
10.1109/EDAPS.2011.6213755
