Compact and high selectivity dual-mode microstrip BPF with frequency-dependent source–load coupling

In this letter, a dual-mode microstrip bandpass filter (BPF) with compact size and high selectivity is designed with a short-stub centred loaded resonator. Owing to the frequency-dependent source–load coupling and the intrinsic characteristics of the short-stub loaded resonator, three transmission z...

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Veröffentlicht in:Electronics letters 2018-02, Vol.54 (4), p.219-221
Hauptverfasser: Deng, Hong-Wei, Liu, Fei, Xu, Tao, Sun, Liang, Xue, Yi-Fan
Format: Artikel
Sprache:eng
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Zusammenfassung:In this letter, a dual-mode microstrip bandpass filter (BPF) with compact size and high selectivity is designed with a short-stub centred loaded resonator. Owing to the frequency-dependent source–load coupling and the intrinsic characteristics of the short-stub loaded resonator, three transmission zeros that are located near the passband edges and in the upper-stopband can be generated to improve the selectivity. The compact BPF with fractional bandwidth of 3.5% located at 2.4 GHz for WLAN application has been designed and fabricated, and good agreement between simulation and measurement verifies the validity of this design methodology.
ISSN:0013-5194
1350-911X
1350-911X
DOI:10.1049/el.2017.4160