Broadband circularly polarized stacked patch antenna for universal UHF RFID applications

Author

Bo-Shau Chen ; Sim, Chow-Yen-Desmond

Author_Institution

Dept. of Electr. Eng., Feng Chia Univ., Taichung, Taiwan

fYear

2014

fDate

2-5 Dec. 2014

Firstpage

99

Lastpage

100

Abstract

A double layer stacked patch antenna with a size of 200 × 200 × 48 mm³ is proposed in this investigation. To achieve broad CP bandwidth that can cover the universal UHF RFID applications (840-960 MHz), a slot loaded circular patch antenna fed by an L-shaped probe is applied as the lower layer (main patch), while the top layer (parasitic patch) is a simple cross slot loaded circular patch. Besides demonstrating broad 10-dB return loss bandwidth of 16% (823-966 MHz), desirable CP bandwidth (3-dB axial ratio) of 14.2% (833-960 MHz) was also measured. Furthermore, the proposed antenna has also yielded a maximum gain of approximately 8 dBic.

Keywords

UHF antennas; broadband antennas; microstrip antennas; polarisation; radiofrequency identification; slot antennas; L-shaped probe; broad CP bandwidth; double layer stacked patch antenna; frequency 823 MHz to 966 MHz; parasitic patch; simple cross slot loaded circular patch; slot loaded circular patch antenna; universal UHF RFID applications; Antenna measurements; Bandwidth; Loss measurement; Patch antennas; Radiofrequency identification; UHF antennas; Circular polarization; patch antenna; stacked patch; universal UHF RFID;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (ISAP), 2014 International Symposium on

Conference_Location

Kaohsiung

Type

conf

DOI

10.1109/ISANP.2014.7026549

Filename

7026549