Closed-form design method for tight parallel-coupled microstrip coupler with ultra-wideband performance and practical dimensions

Abbosh, A. M. (2011) Closed-form design method for tight parallel-coupled microstrip coupler with ultra-wideband performance and practical dimensions. Electronics Letters, 47 9: 547-549. doi:10.1049/el.2011.0733


Author Abbosh, A. M.
Title Closed-form design method for tight parallel-coupled microstrip coupler with ultra-wideband performance and practical dimensions
Journal name Electronics Letters   Check publisher's open access policy
ISSN 0013-5194
1350-911X
Publication date 2011-04-28
Sub-type Article (original research)
DOI 10.1049/el.2011.0733
Volume 47
Issue 9
Start page 547
End page 549
Total pages 3
Place of publication Stevenage, Herts, United Kingdom
Publisher The Institution of Engineering and Technology
Collection year 2012
Language eng
Abstract A closed-form method for designing a microstrip coupler that has a simple planar structure, tight coupling, practical dimensions, and ultra-wideband performance is presented. According to the proposed method, the coupled microstrip structure is divided into three sections. A theoretical model based on the even-odd mode analysis of four-port networks is derived and used to find the optimum length and coupling factor for each of those sections to get an ultra-wideband performance. According to the model, the central section is designed to have a tight coupling by utilising a slotted ground plane and one lumped capacitor, whereas the two side sections have loose coupling. The presented method is validated by building a compact 3dB coupler that has more than 116 fractional bandwidth. © 2011 The Institution of Engineering and Technology.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2012 Collection
School of Information Technology and Electrical Engineering Publications
 
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Created: Wed, 11 May 2011, 08:51:25 EST by Dr Amin Abbosh on behalf of School of Information Technol and Elec Engineering