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An ultra-wideband (UWB) bandpass filter on microstrip line with notch-band, compact-size and improved upper-stopband performances is presented and implemented. A modified non-uniform resonator is at first formed by transversely attaching three pairs of impedance-stepped stubs. Its resonance behavior is thoroughly characterized so as to allocate the first three resonant frequencies within 3.1-10.6...
A novel ultra-wideband (UWB) bandpass filter with improved upper-stopband performance is presented and constituted by integrating an initial UWB filter with two lowpass filters at its two sides. Firstly, a multiple-mode resonator is formed with first three resonant frequencies located within the 3.1-10.6 GHz UWB band while its two-side high-impedance sections are excited by two interdigital coupled...
This paper presents a novel class of ultra-wideband (UWB: 3.1~10.6 GHz) bandpass filters formed on coplanar waveguide. Open-/short-circuited multiple-mode resonators (MMR) are constructed with three distinctive sections and their resonant performances are studied towards allocating the first three resonant modes occurring around the lower-end, center and higher-end of the concerned UWB passband. In...
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