a compact and wideband coupled-line coupler with high coupling level using shunt periodic stubs

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ID: 197278
2013
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Ranked #72 of 100 articles by views in molecular therapy : the journal of the american society of gene therapy

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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 lambda_g/2 and lambda_g/13, respectively, which makes it more compact than the conventional forward coupled-line couplers.
Reference Key
keshavarz2013radioengineeringa Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;R. Keshavarz;M. Movahhedi
Journal molecular therapy : the journal of the american society of gene therapy
Year 2013
DOI
DOI not found
URL
www.radioeng.cz/fulltexts/2013/13_01_0323_0327.pdf
Keywords
electronics nuclear engineering

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