Journal Article

High-selective wideband bandpass filter with adjustable notched-band using stub-loaded resonator

Wang, Y.X, Zhu, L, Zhang, S.B

2013

Overview

A high-selective microstrip wideband bandpass filter (BPF) with an adjustable notched-band is proposed. First, a pair of open-ended stubs is tap-connected to a λ/2 uniform impedance resonator at two symmetrical locations with respect to its centre, and they are further electrically connected by a microstrip line section. Such an arrangement leads to the emergence of a notched-band owing to the out-of-phase cancellation of two dissimilar signal paths in a wide passband. Secondly, the electrical path connecting the two open-ended stubs is gradually tuned so as to adjust the notched-band to the desired frequency location. Finally, a prototype filter is designed and fabricated, and its measured results are provided to verify the predicted frequency response.

• Publisher: The Institution of Engineering and Technology,Institution of Engineering and Technology,John Wiley & Sons, Inc
• Subject: Adjustable / adjustable notched‐band / Applied sciences / band‐pass filters / BPF / Circuit properties / dissimilar signal path cancellation / Electric, optical and optoelectronic circuits / electrical path connection / Electronic circuits / Electronics / Exact sciences and technology / Frequency filters / high‐selective microstrip wideband bandpass filter / microstrip filters / microstrip line section / microstrip lines / Microwave technology / network synthesis / notch filters / open‐ended stub / out‐of‐phase cancellation / resonator filters / stub‐loaded resonator / λ‐2 uniform impedance resonator