Novel wideband filter with a transmission zero based on split-ring resonator DGS

A wideband microstrip filter composed of split-ring resonator DGS and lumped chip capacitor is presented in this article, which has a transmission zero at the right out-of-band. By, using the equivalent-circuit analysis and parameter extracting technology for the split-ring resonator DGS, a band-pass filter with a wide passband from 1 GHz to 2.4 GHz, is fabricated and measured, making use of lumped chip capacitors and T-shaped open-circuit stub to achieve series and shunt capacitance, respectively. (c) 2008 Wiley Periodicals, Inc.