TY  - JOUR
AB  - © The Institution of Engineering and Technology 2018 A compact seventh-order wideband bandpass filter (BPF) with sharp roll-off skirts using coupled lines and open stubs (OSs)/shorted stubs (SSs) is proposed. Seven transmission poles in the passband and four deep transmission zeros from 0 to 2f0 (f0 denotes centre frequency of the passband) can be realised with the help of half-wavelength OSs and quarter-wavelength SSs. For demonstration, a wideband BPF prototype is designed, fabricated with a measured 3-dB fractional bandwidth of 78% (1.22?2.77 GHz) and transition band roll-off rates of over 175 dB/GHz. Good agreement between the simulations and measurements validates the design method.
AU  - Xu, KD
AU  - Zhang, F
AU  - Liu, Y
AU  - Nie, W
DA  - 2018/02/22
DO  - 10.1049/el.2017.4233
EP  - 225
JO  - Electronics Letters
PY  - 2018/02/22
SP  - -225
TI  - High selectivity seventh-order wideband bandpass filter using coupled lines and open/shorted stubs
VL  - 54
Y1  - 2018/02/22
Y2  - 2026/06/19
ER  -