Compact hairpin-shaped duplexer using a BMT substrate with high dielectric constant

Koo Hyung Kwon, Sang Min Han, Shan Nahm, Min Han Kim, Young Sik Kim

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


In this paper, a compact planar microwave duplexer on a high-dielectric substrate is proposed. As Ba(Mg1/3Ta2/3)03 (BMT) has good dielectric performances with a high-dielectric constant of εr = 23, it is suitable for application on printed circuit boards for compact-size circuits. The BMT substrate is fabricated using a tape-casting process; then, metal patterns are screen-printed upon it and silver pasted. An open-loop ring-type duplexer is designed and implemented on the BMT substrate. A size reduction of about 80% is achieved without any degrading duplexer performances, compared with the same one fabricated on a commercial substrate (εr = 6.15).

Original languageEnglish
Pages (from-to)251-253
Number of pages3
JournalMicrowave and Optical Technology Letters
Issue number4
Publication statusPublished - 2004 May 20


  • BMT substrate
  • Ba(MgTa)O (BMT)
  • Dielectric constant
  • Duplexer
  • Tape casting

ASJC Scopus subject areas

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


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