Electronically tunable lumped element 90° hybrid coupler
- 1 January 2006
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 42 (6), 353-355
- https://doi.org/10.1049/el:20060129
Abstract
A method for tuning the centre frequency of a 3 dB hybrid coupler using varactor diodes is presented. The circuit is suitable for reconfigurable or multifunction transceivers that switch between several narrow frequency bands. A prototype covering the PCS, DCS and IMT2000 cellular bands (1710–2170 MHz) is demonstrated.Keywords
This publication has 2 references indexed in Scilit:
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- Synthesis of Symmetrical Branch-Guide Directional CouplersIEEE Transactions on Microwave Theory and Techniques, 1968