Miniaturised wideband bandpass filter based on harmonic suppressed dual transmission lines

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...

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Bibliographic Details
Published inElectronics letters Vol. 52; no. 9; pp. 734 - 736
Main Authors Zhang, Bo, Wu, Yongle, Yu, Cuiping, Liu, Yuanan
Format Journal Article
LanguageEnglish
Published The Institution of Engineering and Technology 28.04.2016
Wiley
Subjects
Bandpass filters
Bandwidth
band‐pass filters
dual transmission lines
Electronics
even‐odd mode method
frequency 1.86 GHz
harmonic suppression characteristics
Harmonics
harmonics suppression
Microwave technology
miniaturised wideband bandpass filter
Parallel connected
parallel connected DTL
passband selectivity
quarter‐wavelength transmission lines
Rejection
series connected dual transmission lines
Transmission lines
UHF filters
upper stopband rejection enhancement
Wideband
wideband BPF
quarter-wavelength transmission lines
series connected dual transmission lines
wideband BPF
passband selectivity
even-odd mode method
frequency 1.86 GHz
transmission lines
UHF filters
miniaturised wideband bandpass filter
band-pass filters
dual transmission lines
upper stopband rejection enhancement
parallel connected DTL
harmonic suppression characteristics
harmonics suppression
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Summary: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 (4.7f0) 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.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0013-5194
1350-911X
1350-911X
DOI:10.1049/el.2016.0361