Improved miniaturization method for coupled-line filters

Seungku Lee, Yongshik Lee

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


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.

Original languageEnglish
Pages (from-to)2825-2828
Number of pages4
JournalMicrowave and Optical Technology Letters
Issue number12
Publication statusPublished - 2010 Dec

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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