Dual-band bandpass filter design using miniaturized spiral scheme

Dual-band bandpass filter design using miniaturized spiral scheme

ABSTRACT A compact dual‐band bandpass filter using two sets of spiral resonators and loaded spiral open‐stub is proposed. The dual‐band resonances are introduced by the quarter‐wavelength (λ/4) spiral resonator and λ/2 asymmetrical spiral stepped‐impedance resonator, respectively. Then, the loaded s...

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Veröffentlicht in:Microwave and optical technology letters 2014-04, Vol.56 (4), p.997-999
Hauptverfasser: Luo, Xun, Qian, Huizhen, Sun, Sheng, Chen, Zhining-Ning
Format: Artikel
Sprache:eng
Schlagworte:
Asymmetry
bandpass filter
Bandpass filters
Digital broadcasting
dual-band
Microwaves
Miniaturization
miniaturized spiral scheme
Resonators
Spirals
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Zusammenfassung:ABSTRACT A compact dual‐band bandpass filter using two sets of spiral resonators and loaded spiral open‐stub is proposed. The dual‐band resonances are introduced by the quarter‐wavelength (λ/4) spiral resonator and λ/2 asymmetrical spiral stepped‐impedance resonator, respectively. Then, the loaded spiral open‐stub tapped on the λ/4 spiral resonator is utilized for spurious shifting close to transmission zero, which can lead to spurious suppression for extended upper stopband. Finally, a dual‐band bandpass filter with good performance and size miniaturization is fabricated and verified experimentally. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:997–999, 2014
ISSN:0895-2477
1098-2760
DOI:10.1002/mop.28246