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End‐coupled microstrip slow‐wave resonator filtlers using high‐permittivity ceramic substrate
Author(s) -
Huang ChengLiang,
Liu ShihSheng
Publication year - 2009
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.24366
Subject(s) - miniaturization , microstrip , ceramic , microwave , resonator , materials science , permittivity , substrate (aquarium) , relative permittivity , center frequency , insertion loss , dielectric , optoelectronics , band pass filter , electronic engineering , electrical engineering , telecommunications , engineering , composite material , nanotechnology , oceanography , geology
The miniaturization of end‐coupled microstrip slow‐wave resonator filters using two high‐permittivity ceramic substrates (with respective dielectric constants of 9.7 and 25.45) were investigated. The designed end‐coupled structures were simulated using an IE3D simulator. The responses of the fabricated filters using Al 2 O 3 (ε r = 9.7, tan δ = 0.000036) and newly developed 0.85MgTiO 3 ‐0.15Ca 0.6 La 0.8/3 TiO 3 (ε r = 25.45, tan δ = 0.00002) ceramic substrates were designed to have a center frequency of 1.8 GHz. The proposed filter showed not only a tremendous reduction in the insertion loss but also demonstrates a marvelous cut in its size. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1613–1615, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24366