Second order dual-path coupled line filter

An original filter topology based on dual-path parallel coupled-lines is presented. Two identical coupled-lines are combined in parallel to result in a wideband bandpass response. Two transmission zeros are also resulted thanks to the cancellation effect in the dual-path connection. It is also shown...

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Bibliographic Details
Main Authors: Nordin, S. A., Mohd Salleh, M. K.
Format: Conference Proceeding
Language:English
Subjects:
Band pass filters
bandpass filters
coupled-lines
Filtering theory
Microstrip filters
Microwave filters
Resonator filters
Wideband
wideband filters
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Description
Summary:An original filter topology based on dual-path parallel coupled-lines is presented. Two identical coupled-lines are combined in parallel to result in a wideband bandpass response. Two transmission zeros are also resulted thanks to the cancellation effect in the dual-path connection. It is also shown that the use of asymmetrical coupled lines helps in giving more flexibility in obtaining higher coupling for better in-band matching. The proposed concept is tested using microstrip technology on FR4 substrate. Simulation and measurement results are presented in this paper to show its feasibility.
ISSN:2324-7843
DOI:10.1109/ISWTA.2011.6089541