Compact and high‐selectivity microstrip bandpass filter using two‐stage twist‐modified asymmetric split‐ring resonators | Zendy

Li Jian | Zendy; Huang Yongjun | Zendy; Wen Guangjun | Zendy; Xue Xiaolin | Zendy; Song Jiaming | Zendy

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Compact and high‐selectivity microstrip bandpass filter using two‐stage twist‐modified asymmetric split‐ring resonators

Author(s) -

Li Jian,

Huang Yongjun,

Wen Guangjun,

Xue Xiaolin,

Song Jiaming

Publication year - 2015

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

ISSN - 1350-911X

DOI - 10.1049/el.2014.3988

Subject(s) - band pass filter , resonator , twist , microstrip , selectivity , materials science , ring (chemistry) , frequency selectivity , filter (signal processing) , electronic engineering , optoelectronics , topology (electrical circuits) , mathematics , engineering , electrical engineering , geometry , chemistry , biochemistry , organic chemistry , catalysis

A compact and high frequency selectivity two‐stage microstrip bandpass filter is designed and experimentally demonstrated. Such a kind of filter is composed of two pairs of twist‐modified asymmetric split‐ring resonators (SRRs) to achieve three transmission poles within the passband and four transmission zeros at low and high rejection bands. Sharply out‐of‐band reductions contributing to the high frequency selectivity are obtained by properly detuning the gaps among the SRRs. The measured results show that the proposed filter with dimensions of 0.088 × 0.088 λ 2 has a 3 dB passband of 15.2% centred at 1.98 GHz. This filter can be flexibly integrated in miniaturised radio‐frequency/microwave circuits.

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