A compact, ultra-broadband coplanar-waveguide (CPW) bandpass filter (BPF) is presented. CPW-BPF comprises solely open- and short-stub structures. Compared with the conventional broadband CPW-BPFs, the proposed filter is of a relatively compact configuration. The demonstrated CPW-BPF has about 110% 3-dB fractional bandwidth, sharp selectivity, and good stopband rejection (C) 2010 Wiley Periodicals Inc Microwave Opt Technol Lett 52 715-718. 2010, Published online in Wiley InterScience (www.interscience.wiley.com) DOI 10.1002/mop.25028
