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Two novel compact ultra-wideband (UWB) bandpass filter is developed by using two kinds of stub-loaded triple-mode resonator doublets. The proposed doublet consists of two parallel but oppositely arranged stub-loaded resonators. An UWB filter is designed by cascading three doublets, and eleven transmission poles are obtained in its passband. The high-orders filter has a passband covering 3.4–10.4 GHz,...
An ultra-wideband near-field mapping system has been setup to scan the electromagnetic (EM) surface field above planar/PCB circuits. A semi-rigid coaxial electric probe is employed to measure the electric field up to 18 GHz and an improved CPW loop-type magnetic probe with self-resonance-suppression characteristics is used to measure the magnetic field up to more than 10 GHz. In order to verify the...
This paper presents a brief review and recent development of ultra-wideband (UWB) filters for microwave UWB radio system (from 3.1 to 10.6 GHz) using broadside-coupled structures. Design considerations and requirements for such UWB filters to meet the UWB regulation are described. Several recently developed UWB filters, including full FCC UWB bandpass filter, UWB lowpass filter, notch-band implemented...
An investigation has been carried to get an insight of the operation of a compact ultra wideband (UWB) bandpass filter structure. A circuit model is then proposed for modeling this type of filter. The results of circuit modeling are in good agreements with full-wave electromagnetic (EM) simulations and measurements.
This paper presented a dual-band ultra-wideband (UWB) bandpass filter. The filter is based on a novel UWB bandpass filter structure, proposed by authors recently, which consists of a broadside-coupled microstrip-coplanar waveguide and exhibited its excellent ultra-wideband property. The dual-band operation was implemented by integrating a stub in the broadside-coupled conductors. The resonance of...
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