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Progress In Electromagnetics Research
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COMPACT MICROSTRIP BANDPASS FILTER WITH MULTISPURIOUS SUPPRESSION

By H.-W. Wu, S.-K. Liu, M.-H. Weng, and C.-H. Hung

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Abstract:
A compact microstrip bandpass filter (BPF) with multispurious suppression is presented. The filter consists of two coupled half-wavelength stepped impedance resonators (SIRs) and tapped input/output (I/O) lines. With tuning the impedance ratio (K) and length ratio (α) of SIRs, a very wide stopband can be easily achieved. The filter is designed at 2.4 GHz (f0) with a wide stopband to 20 GHz (8.16f0) and an average rejection level better than 25 dB. This study provides a simple and effective method to achieve a filter with very wide stopband and compact circuit size simultaneously. Good agreement between the full-wave electromagnetic (EM) simulation and measurement is compared.

Citation:
H.-W. Wu, S.-K. Liu, M.-H. Weng, and C.-H. Hung, "Compact Microstrip Bandpass Filter with Multispurious Suppression," Progress In Electromagnetics Research, Vol. 107, 21-30, 2010.
doi:10.2528/PIER10061601
http://www.jpier.org/PIER/pier.php?paper=10061601

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