DocumentCode
1006393
Title
Accordion shape monofilar axial mode helix for RFID reader
Author
Lau, P.Y. ; Wong, H. ; Yung, E.K.N.
Author_Institution
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
Volume
42
Issue
11
fYear
2006
fDate
5/25/2006 12:00:00 AM
Firstpage
607
Lastpage
608
Abstract
An accordion shape monofilar axial mode helical antenna designed by curving the helix along the axis is proposed. This antenna achieves a low-profile characteristic as the 10-turn helix´s axial length is 0.354/spl lambda/. The impedance bandwidth (SWR<1.5) is 9% from the frequency of 880 to 963 MHz and the axial ratio bandwidth (AR<3 dB) is 6.5%. The measured gain is 10.2 dBi. This antenna operated at the centre frequency of 915 MHz and has a tilted radiation of 17/spl deg/ to the curving side.
Keywords
antenna radiation patterns; helical antennas; radiofrequency identification; 880 to 963 MHz; RFID reader; accordion shape monofilar axial mode helix; helical antenna;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el:20060398
Filename
1648587
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