Analysis and design of a parallel coupled‐line quadrature coupler with lumped‐elements
ISSN: 0332-1649
Article publication date: 9 March 2010
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.
Keywords
Citation
Wu, J. and Wang, L. (2010), "Analysis and design of a parallel coupled‐line quadrature coupler with lumped‐elements", COMPEL - The international journal for computation and mathematics in electrical and electronic engineering, Vol. 29 No. 2, pp. 370-377. https://doi.org/10.1108/03321641011014841
Publisher
:Emerald Group Publishing Limited
Copyright © 2010, Emerald Group Publishing Limited