A Compact and Wideband Coupled-Line Coupler with High Coupling Level Using Shunt Periodic Stubs
Loading...
Date
2013-04
Authors
Keshavarz, Rasool
Movahhedi, Masoud
ORCID
Advisor
Referee
Mark
Journal Title
Journal ISSN
Volume Title
Publisher
Společnost pro radioelektronické inženýrství
Abstract
A wideband microstrip forward-wave coupled-line coupler with high coupling value is presented. Compared with the conventional edge-coupled microstrip forward-wave coupler, this symmetrical structure, consisting periodic shunt stubs between the two coupled-lines, achieves wider operating bandwidth and larger coupling level. To characterize this structure, the equivalent circuit model is established and verified by measurement and full-wave results. The designed and fabricated prototype is a 0-dB forward-wave coupler with 0.6 mm stub length. This coupler exhibits a coupled amplitude balance of ±2 dB, good matching (15dB) and at least 15dB isolation between adjacent ports over a wide bandwidth of 66% from 2 GHz to 4 GHz centered at 3 GHz. The coupled-line length and width of the proposed structure are approximately λg/2 and λg/13, respectively, which makes it more compact than the conventional forward coupled-line couplers.
Description
Citation
Radioengineering. 2013, vol. 22, č. 1, s. 323-327. ISSN 1210-2512
http://www.radioeng.cz/fulltexts/2013/13_01_0323_0327.pdf
http://www.radioeng.cz/fulltexts/2013/13_01_0323_0327.pdf
Document type
Peer-reviewed
Document version
Published version
Date of access to the full text
Language of document
en