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Improved miniaturization method for coupled-line filters

✍ Scribed by Seungku Lee; Yongshik Lee

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
416 KB
Volume
52
Category
Article
ISSN
0895-2477

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✦ Synopsis

Abstract

A miniaturization method for coupled‐line filters is demonstrated that relies on the equality of the two most important parameters for filter synthesis, the propagation constant and the image impedance, before and after miniaturization.The method enables to maintain the bandwidth intact as opposed to the previous miniaturization method based on the same structure. This proves that bandwidth reduction in miniaturized filters is not due to miniaturization itself but rather due to the mathematical formulation of miniaturization. As compensation of reduced bandwidth is not necessary, the proposed method provides much simpler miniaturization procedure. © 2010 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52:2825–2828, 2010; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25607

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