Miniaturised wideband bandpass filter based on harmonic suppressed dual transmission lines

作者：Zhang, Bo^*; Wu, Yongle; Yu, Cuiping; Liu, Yuanan

来源：Electronics Letters, 2016, 52(9): 734-735.

DOI：10.1049/el.2016.0361

• 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

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 (4.7f(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.

• 出版日期2016-4-28
• 单位北京邮电大学