Compact quasi-lumped hybrid coupler tunable over large frequency band
- 1 January 2007
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 43 (19), 1030-1031
- https://doi.org/10.1049/el:20072195
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
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