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

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

doi:10.1002/mop.22533

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

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

Department of Electrical Engineering

Research output: Contribution to journal › Article › peer-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 Al₂O₃ (ε_r = 10, Q × f = 20,000 GHz) and 0.85(M_80.95Zn_0.05)TiO ₃ - O.15Ca_0.6La_0.8/3TiO₃ ε_r = 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 language	English
Pages (from-to)	1609-1613
Number of pages	5
Journal	Microwave and Optical Technology Letters
Volume	49
Issue number	7
DOIs	https://doi.org/10.1002/mop.22533
Publication status	Published - 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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10.1002/mop.22533

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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 Al2O3 (εr = 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.",

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

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