Miniaturised wideband bandpass filter based on harmonic suppressed dual transmission lines. Issue 9 (4th April 2016)

• Record Type: Journal Article
• Authors: Zhang, Bo; Wu, Yongle; Yu, Cuiping; Liu, Yuanan
• Is Part Of: Electronics letters. Volume 52:Issue 9(2016)
• Page Start: 734
• Page End: 736
• Publication Date: 2016-04-04
• Subjects: band‐pass filters -- harmonics suppression -- transmission lines -- UHF filters; miniaturised wideband bandpass filter -- dual transmission lines -- passband selectivity -- upper stopband rejection enhancement -- harmonic suppression characteristics -- series connected dual transmission lines -- parallel connected DTL -- even‐odd mode method -- wideband BPF -- quarter‐wavelength transmission lines -- frequency 1.86 GHz; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2016.0361
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : A novel miniaturised wideband bandpass filter (BPF) based on harmonic suppressed dual transmission lines (DTLs) is introduced with enhanced upper stopband rejection and passaband selectivity. The transmission and harmonic suppression characteristics of series and parallel connected DTLs are analysed adopting even–odd mode method. To verify the proposed structure, a high selective wideband BPF centred at 1.86 GHz with a fractional bandwidth of 93.5% is designed and fabricated. The upper stopband is extended up to 8.8 GHz (4.7 f 0 ) with the suppression level of above 35 dB. Furthermore, a size reduction of 30% can be achieved in proposed BPF, compared with conventional wideband BPF based on quarter‐wavelength transmission lines.