Using high permittivity ceramic substrates to fabricate a miniaturized bandpass filter with capacitive load

Cheng-Liang Huang, Jun Jie Wang, Po Hsin Li

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Using high permittivity ceramic substrates and capacitive coupling to miniaturize the sizes of Butterworth bandpass filters are investigated. The selectivity and stopband rejection of the designed filters can be improved significantly by utilizing a skew-symmetric (zero degree) feed structure. These factors result in reducing the size of the filter. The responses of the Butterworth filters using Al2O3r = 10, Q × f = 20,000 GHz) and 0.85(M80.95Zn0.05)TiO 3 - O.15Ca0.6La0.8/3TiO3 εr = 26, Q × f = 86,000 GHz) ceramic substrates are designed at a center frequency of 2.4 GHz. The compact size, low-loss, sharp response, and performance of the filter are presented in this article.

Original languageEnglish
Pages (from-to)1609-1613
Number of pages5
JournalMicrowave and Optical Technology Letters
Volume49
Issue number7
DOIs
Publication statusPublished - 2007 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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