Novel Notched UWB Filter Using Stepped Impedance Stub Loaded Microstrip Resonator and Spurlines

摘要

This paper presents a novel ultrawideband (UWB) bandpass filter using stepped impedance stub loaded microstrip resonator (SISLMR). The proposed resonator is so formed to allow its four resonant frequencies in the UWB passband, which extends from 3.1GHz to 10.6GHz.Moreover, two spurline sections are employed to create a sharp notched-band filter for suppressing the signals of 5GHzWLANdevices. Experimental results of the fabricated filters are in good agreementwith the HFSS simulations and validate the design.