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Compact hairpin‐shaped duplexer using a BMT substrate with high dielectric constant
Author(s) -
Hyung Kwon Koo,
Han SangMin,
Nahm Shan,
Kim Min Han,
Kim YoungSik
Publication year - 2004
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.20108
Subject(s) - duplexer , substrate (aquarium) , materials science , dielectric , microwave , optoelectronics , tape casting , planar , high κ dielectric , electrical engineering , electronic engineering , ceramic , composite material , engineering , telecommunications , computer science , oceanography , antenna (radio) , geology , computer graphics (images)
In this paper, a compact planar microwave duplexer on a high‐dielectric substrate is proposed. As Ba(Mg 1/3 Ta 2/3 )O 3 (BMT) has good dielectric performances with a high‐dielectric constant of ε r = 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 (ε r = 6.15). © 2004 Wiley Periodicals, Inc. Microwave Opt Technol Lett 41: 251–253, 2004; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.20108
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