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Analysis and design of a parallel coupled‐line quadrature coupler with lumped‐elements

Analysis and design of a parallel coupled‐line quadrature coupler with lumped‐elements Purpose – The purpose of this paper is to present a broadband parallel coupled‐line quadrature coupler implemented with lumped‐elements. Design/methodology/approach – The even‐ and odd‐mode method is used to compute the proposed coupler, and the analysis and optimization are done using the computer‐aided design tools. A design example of a broadband tunable quadrature coupler is provided. Findings – This novel structure is clearly increasing the conductor spacing and decreasing the whole structure size, at the same time, the bandwidth is much wider. Originality/value – This paper shows how a parallel coupled‐line quadrature coupler with lumped‐elements has been analyzed and designed, and proposes a simple and convenient method to calculate this structure. Compared with the normal parallel coupled‐line structure, the conductor spacing of this coupler is increased effectively, while the structure size is decreased. In addition, because of the tunable embedded capacitors, the bandwidth becomes much wider – a broadband up to 77 percent is achieved. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering Emerald Publishing

Analysis and design of a parallel coupled‐line quadrature coupler with lumped‐elements

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References (8)

Publisher
Emerald Publishing
Copyright
Copyright © 2010 Emerald Group Publishing Limited. All rights reserved.
ISSN
0332-1649
DOI
10.1108/03321641011014841
Publisher site
See Article on Publisher Site

Abstract

Purpose – The purpose of this paper is to present a broadband parallel coupled‐line quadrature coupler implemented with lumped‐elements. Design/methodology/approach – The even‐ and odd‐mode method is used to compute the proposed coupler, and the analysis and optimization are done using the computer‐aided design tools. A design example of a broadband tunable quadrature coupler is provided. Findings – This novel structure is clearly increasing the conductor spacing and decreasing the whole structure size, at the same time, the bandwidth is much wider. Originality/value – This paper shows how a parallel coupled‐line quadrature coupler with lumped‐elements has been analyzed and designed, and proposes a simple and convenient method to calculate this structure. Compared with the normal parallel coupled‐line structure, the conductor spacing of this coupler is increased effectively, while the structure size is decreased. In addition, because of the tunable embedded capacitors, the bandwidth becomes much wider – a broadband up to 77 percent is achieved.

Journal

COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic EngineeringEmerald Publishing

Published: Mar 9, 2010

Keywords: Coupled‐line quadrature coupler; Lumped‐element; Even and odd‐mode; Tunable capacitor

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