PROJECT TITLE :
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 adopting even–odd mode methodology. To verify the proposed structure, a high selective wideband BPF centred at 1.86 GHz with a fractional bandwidth of 93.fivepercent is designed and fabricated. The upper stopband is extended up to 8.eight GHz (four.7f0) with the suppression level of on top of thirty five dB. Furthermore, a size reduction of thirtyp.c can be achieved in proposed BPF, compared with conventional wideband BPF based mostly on quarter-wavelength transmission lines.
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