Two-poles compact microstrip bandpass filter with sharp transition bands using high permittivity substrate

Wen Ruei Yang, Cheng Liang Huang

Research output: Contribution to journalArticlepeer-review

Abstract

This article describes the two-pole microstrip band-pass filters using miniaturized center-stubbed open stubs and tapped-line input/output ports. The two-poles bandpass filters by using FR4 and high-permittivity ceramic substrates (with respective dielectric constants of 4.5 and 31.55) are investigated. Microwave dielectric ceramics with high permittivity are commonly applied in several microwave communication components. The advantage of using high permittivity ceramic substrates is to reduce the sizes and increase the performance of microstrip bandpass filters. The responses of the filters using FR4 (ε r = 4.5, tan δ = 0.015) and Nd(Zn 1/2Ti 1/2)O 3r = 31.55, tan δ= 0.00005) ceramic substrates are designed at a center frequency of 2 GHz. The compact size, low-loss, sharp response, and performance of the filter are presented in this article.

Original languageEnglish
Pages (from-to)1683-1686
Number of pages4
JournalMicrowave and Optical Technology Letters
Volume54
Issue number7
DOIs
Publication statusPublished - 2012 Jul 1

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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