摘要

A new and compact ultra-wideband (UWB) bandpass filter (BPF) using hybrid microstrip/coplanar waveguide (CPW) structure is proposed. The presented filter has been designed, fabricated, and measured for UWB system. Measured results demonstrated the UWB properties from 3.1 to 8.9 GHz (-3 dB bandwidth), which firactional bandwidth of 96% at the center frequency 6.0 GHz. The filter also exhibits a sharper slop response at the lower passband edge than that reported in the article (Thomson and Hong, IEEE Microwave Wireless Compon Lett 17 (2007) 184-186), and deeper and wider stop-band rejection than that reported in the article (Thomson and Hong, IEEE Microwave Wireless Compon Lett 17 (2007) 184-186; Li et al., IEEE MTT-S hit Dig 2005, 675-678) (it the higher passband edge. (D 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 24-26, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23977