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Design of compact coupled-line couplers

Coetzee, Jacob, Cordwell, James, & Waite, Shauna (2011) Design of compact coupled-line couplers. .

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    Abstract

    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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    ID Code: 43639
    Item Type: Journal Article
    Additional Information: Submitted to "IEEE Microwave and Wireless Components Letters" for publication - ISSN: 1531-1309
    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 The Authors
    Deposited On: 27 Jul 2011 09:50
    Last Modified: 27 Jul 2011 10:17

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