Design of compact coupled-line couplers

Coetzee, Jacob, Cordwell, James, & Waite, Shauna (2011) Design of compact coupled-line couplers. [Working Paper] (Unpublished)


The size of rat-race and branch-line couplers can be reduced by using periodic loading or artificial transmission lines. The objective of this work is to extend the idea of size reduction through periodic loading to coupled-line 90° hybrids. A procedure for the extraction of the characteristic parameters of a coupled-line 4-port from a single set of S-parameters is described. This method can be employed to design of coupled artificial transmission line couplers of arbitrary geometry. The procedure is illustrated through the design a broadside-coupled stripline hybrid, periodically loaded with stubs. Measured results for a prototype coupler confirm the validity of the theory.

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442 since deposited on 26 Jul 2011
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ID Code: 43639
Item Type: Working Paper
Refereed: Yes
Keywords: directional couplers, coupled lines, compact size, periodic structures, parameter extraction
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Electrical and Electronic Engineering not elsewhere classified (090699)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2011 [please consult the author]
Deposited On: 26 Jul 2011 23:50
Last Modified: 07 Sep 2013 10:46

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