Compact dual-band filter using defected stepped impedance resonator

Bian Wu; Chang Hong Liang; Pei Yuan Qin; Qi Li

doi:10.1109/LMWC.2008.2003459

Compact dual-band filter using defected stepped impedance resonator

Bian Wu^*, Chang Hong Liang, Pei Yuan Qin, Qi Li

^*Corresponding author for this work

Department of Computing

Research output: Contribution to journal › Article

51 Citations (Scopus)

Abstract

This letter presents a novel approach for designing a dual-band bandpass filter by using defected stepped impedance resonator (DSIR). The resonant frequency of the DSIR is found to be much lower than that of the conventional microstrip stepped impedance resonator (SIR), which reduces the circuit size effectively. Two types of second-order DSIR microstrip bandpass filter operating at 1.85 and 2.35 GHz, respectively, are well designed according to the classical theory of coupled resonator filter. Then they are combined to construct a compact dual-band filter with a common parallel microstrip feed line, the measurement results of the fabricated filter have a good agreement with the simulation.

Original language	English
Article number	4639544
Pages (from-to)	674-676
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	18
Issue number	10
DOIs	https://doi.org/10.1109/LMWC.2008.2003459
Publication status	Published - Oct 2008

Keywords

Bandpass filter
Compact size
Defected stepped impedance resonator (DSIR)
Dual-band

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10.1109/LMWC.2008.2003459

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abstract = "This letter presents a novel approach for designing a dual-band bandpass filter by using defected stepped impedance resonator (DSIR). The resonant frequency of the DSIR is found to be much lower than that of the conventional microstrip stepped impedance resonator (SIR), which reduces the circuit size effectively. Two types of second-order DSIR microstrip bandpass filter operating at 1.85 and 2.35 GHz, respectively, are well designed according to the classical theory of coupled resonator filter. Then they are combined to construct a compact dual-band filter with a common parallel microstrip feed line, the measurement results of the fabricated filter have a good agreement with the simulation.",

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AU - Qin, Pei Yuan

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AB - This letter presents a novel approach for designing a dual-band bandpass filter by using defected stepped impedance resonator (DSIR). The resonant frequency of the DSIR is found to be much lower than that of the conventional microstrip stepped impedance resonator (SIR), which reduces the circuit size effectively. Two types of second-order DSIR microstrip bandpass filter operating at 1.85 and 2.35 GHz, respectively, are well designed according to the classical theory of coupled resonator filter. Then they are combined to construct a compact dual-band filter with a common parallel microstrip feed line, the measurement results of the fabricated filter have a good agreement with the simulation.

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