Title :
Compact quasi-lumped hybrid coupler tunable over large frequency band
Author :
Ferrero, F. ; Luxey, C. ; Staraj, R. ; Jacquemod, G. ; Fusco, V.F.
Author_Institution :
Univ. of Nice, Valbonne
Abstract :
The design of a tunable hybrid coupler is presented. The structure is composed of two cascaded active quasi-lumped couplers. Over 460% bandwidth is achieved using varactor diode tuning. This circuit, which operates from 1.5 to 7 GHz, consumes virtually no DC power and its size is reduced by a ratio of five when compared to that of a classical branchline coupler.
Keywords :
UHF circuits; cascade networks; circuit tuning; coupled circuits; microwave circuits; varactors; branchline coupler; cascaded active quasilumped coupler tuning; varactor diode tuning;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20072195
