Highly Selective Microstrip Bandpass Filters for Ultra-Wideband (UWB) Applications

Abstract

Highly selective microstrip bandpass filters for UWB applications are proposed, by using the optimum distributed highpass filter structure of 11th-order to achieve a wide bandwidth from 3.1 to 10.6GHz as well as good selectivity. In addition, suitable filter layout is adopted to reduce the filter size and the number of vias required. Specifically, two compact 11th-order UWB microstrip bandpass filters with good selectivity are implemented and carefully examined.