DocumentCode :
1315671
Title :
A Compact Interdigital Capacitor-Inserted Multiband Antenna for Wireless Communication Applications
Author :
Liu, Jing-Xian ; Yin, Wen-Yan
Author_Institution :
State Key Lab. of MOI, Zhejiang Univ., Hangzhou, China
Volume :
9
fYear :
2010
fDate :
7/2/1905 12:00:00 AM
Firstpage :
922
Lastpage :
925
Abstract :
A compact coupled-fed antenna for multiband wireless communications is developed in this letter. It makes use of an interdigital capacitor for impedance matching at the frequency of 1.28 GHz. To improve its impedance-matching characteristics at 2.7and 5.5-GHz bands, step-impedance transmission lines are implemented into its design. With overall optimization, such an antenna can operate at 1.26-1.3, 2.49-2.92, and 5.04-6.0 GHz, respectively, with the return loss of better than 10 dB. The two upper bands are wide enough for both applications of WiMAX (2.49-2.69 GHz) and WLAN (5-5.9 GHz). The size of the antenna prototype is only about 0.1 λ0 × 0.0036λ0 × 0.0034λ0 at 1.28 GHz, with almost unchanged radiation patterns achieved at each operating band.
Keywords :
antenna feeds; antenna radiation patterns; capacitors; coupled transmission lines; impedance matching; multifrequency antennas; optimisation; radiocommunication; WLAN; WiMAX; antenna radiation patterns; compact coupled fed antenna; frequency 1.28 GHz; frequency 2.7 GHz; frequency 5.5 GHz; impedance matching; interdigital capacitor; multiband antenna; optimization; step impedance transmission lines; wireless communications; Antenna measurements; Antenna radiation patterns; Bandwidth; Capacitors; Feeds; Impedance matching; Feed line; folded antenna; impedance matching; interdigital capacitor; multiband antenna; radiation pattern; wideband;
fLanguage :
English
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
Publisher :
ieee
ISSN :
1536-1225
Type :
jour
DOI :
10.1109/LAWP.2010.2073435
Filename :
5565549
Link To Document :
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