Using high permittivity ceramic substrates to design a bandpass filter with open stub

Cheng Liang Huang; Jun Jie Wang; Yu Pin Chang

doi:10.1002/mop.22252

Using high permittivity ceramic substrates to design a bandpass filter with open stub

Cheng Liang Huang, Jun Jie Wang, Yu Pin Chang

Department of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The advantage of using high permittivity ceramic sub-strates is to miniaturize the sizes of microstrip bandpass filters. The selectivity and stopband rejection of the designed filters can be improved significantly by utilizing open stubs. The designed filter with appropriate open stub can create tunable transmission zero. These factors will reduce the size of the filter and increase its performance. The responses of the filters using Al ₂O₃ (ε_r = 9.8, tanδ = 0.0001) and 0.96(Mg_0.95Zn_0.05) TiO₃-0.04SrTiO₃ (ε_r, = 20.7, tanδ = 0.00007) ceramic substrates are designed at a center frequency of 2.45 GHz. Finally, the open stub and high permittivity ceramic substrates are applied to the design of a direct-coupled hairpin filter. The compact size, low-loss, sharp response, and performance of the filter are presented in this article.

Original language	English
Pages (from-to)	771-773
Number of pages	3
Journal	Microwave and Optical Technology Letters
Volume	49
Issue number	4
DOIs	https://doi.org/10.1002/mop.22252
Publication status	Published - 2007 Apr

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.22252

Cite this

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abstract = "The advantage of using high permittivity ceramic sub-strates is to miniaturize the sizes of microstrip bandpass filters. The selectivity and stopband rejection of the designed filters can be improved significantly by utilizing open stubs. The designed filter with appropriate open stub can create tunable transmission zero. These factors will reduce the size of the filter and increase its performance. The responses of the filters using Al 2O3 (εr = 9.8, tanδ = 0.0001) and 0.96(Mg0.95Zn0.05) TiO3-0.04SrTiO3 (εr, = 20.7, tanδ = 0.00007) ceramic substrates are designed at a center frequency of 2.45 GHz. Finally, the open stub and high permittivity ceramic substrates are applied to the design of a direct-coupled hairpin filter. 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 design a bandpass filter with open stub

Abstract

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