DocumentCode
803567
Title
Varactor-Tuned Dual-Band Quadrature Hybrid Coupler
Author
Djoumessi, Erick Emmanuel ; Marsan, Eric ; Caloz, Christophe ; Chaker, Mohamed ; Wu, Ke
Author_Institution
Poly-Grames Res. Center, Ecole Polytech. de Montreal, Que.
Volume
16
Issue
11
fYear
2006
Firstpage
603
Lastpage
605
Abstract
A tunable dual-band quadrature hybrid coupler for mobile GSM bands (900 and 1800MHz) is proposed and characterized. The structure is composed of four quarter-wavelength sections at a frequency located between the two operating frequencies and two pairs of open-ended stubs. Frequency tuning is achieved by modifying the electrical length of the open-ended stubs with varactor-diode capacitors. A dual-band tunability of 33% and 10% is obtained for the first and the second bands, respectively
Keywords
3G mobile communication; cellular radio; varactors; waveguide couplers; 1800 MHz; 900 MHz; frequency tuning; mobile GSM bands; open-ended stubs; tunable dual-band quadrature hybrid coupler; varactor diode; Capacitors; Couplings; Diodes; Dual band; Frequency; GSM; Impedance; Transmission lines; Tuning; Varactors; Dual-band operation; GSM bands; quadrature hybrid coupler; tunability; varactor diode;
fLanguage
English
Journal_Title
Microwave and Wireless Components Letters, IEEE
Publisher
ieee
ISSN
1531-1309
Type
jour
DOI
10.1109/LMWC.2006.884905
Filename
1717517
Link To Document