Premium
Improved miniaturization method for coupled‐line filters
Author(s) -
Lee Seungku,
Lee Yongshik
Publication year - 2010
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.25607
Subject(s) - miniaturization , bandwidth (computing) , microwave , electronic engineering , engineering , electrical engineering , telecommunications
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