High-rejection wideband signal-interference microstrip filters using rat-race couplers
- 1 January 2006
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 42 (20), 1162-1164
- https://doi.org/10.1049/el:20062039
Abstract
A new type of sharp, high-rejection wideband microstrip filter based on signal-interference techniques is reported. The proposed topology uses, for the first time, rat-race couplers operating as transversal filtering sections (TFSs). Design equations and guidelines for this TFS are provided. Furthermore, to prove its experimental usefulness, a 6.5 GHz ultra-wideband prototype has been synthesised, constructed and measured.Keywords
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