Cross-coupled hairpin filter design using high-permittivity substrates

Cheng Shing Hsu; Cheng-Liang Huang

doi:10.1002/mop.20158

Cross-coupled hairpin filter design using high-permittivity substrates

Cheng Shing Hsu, Cheng-Liang Huang

Department of Electrical Engineering

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

Abstract

A four-pole elliptic-function bandpass filter is designed using a compact miniaturized microstrip hairpin resonator. This miniaturized hairpin resonator is realized by using a stepped-impedance structure with parallel coupled lines. In addition, the bandpass filter is implemented using a high-permittivity ceramic substrate. These factors result in the reduction of the filter's size. The full-wave simulator IE3D is used to design the hairpin resonator, and to calculate the coupling coefficient of the basic coupling strictures. The responses of the fabricated filters using Al₂O₃ (ε_r = 9.7, Q × f = 350,000 GHz) and MgNb₂O ₆ (ε_r = 20, Q × f = 110,000 GHz) ceramic substrates are designed at a center frequency of 2 GHz. The compact size and the performance of this class of filters are demonstrated.

Original language	English
Pages (from-to)	419-423
Number of pages	5
Journal	Microwave and Optical Technology Letters
Volume	41
Issue number	5
DOIs	https://doi.org/10.1002/mop.20158
Publication status	Published - 2004 Jun 5

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.20158

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abstract = "A four-pole elliptic-function bandpass filter is designed using a compact miniaturized microstrip hairpin resonator. This miniaturized hairpin resonator is realized by using a stepped-impedance structure with parallel coupled lines. In addition, the bandpass filter is implemented using a high-permittivity ceramic substrate. These factors result in the reduction of the filter's size. The full-wave simulator IE3D is used to design the hairpin resonator, and to calculate the coupling coefficient of the basic coupling strictures. The responses of the fabricated filters using Al2O3 (εr = 9.7, Q × f = 350,000 GHz) and MgNb2O 6 (εr = 20, Q × f = 110,000 GHz) ceramic substrates are designed at a center frequency of 2 GHz. The compact size and the performance of this class of filters are demonstrated.",

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Cross-coupled hairpin filter design using high-permittivity substrates

Abstract

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