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Two‐poles compact microstrip bandpass filter with sharp transition bands using high permittivity substrate
Author(s) -
Yang WenRuei,
Huang ChengLiang
Publication year - 2012
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.26889
Subject(s) - microstrip , band pass filter , microwave , permittivity , materials science , center frequency , ceramic , relative permittivity , optoelectronics , dielectric , substrate (aquarium) , insertion loss , electronic engineering , filter (signal processing) , electrical engineering , telecommunications , engineering , composite material , oceanography , geology
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 1/2 Ti 1/2 )O 3 (ε r = 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. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1683–1686, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26889