%0 Journal Article %A Hung-Wei Wu and Yung-Wei Chen and Yu-Fu Chen and Cheng-Yuan Hung %D 2012 %J International Journal of Electronics and Communication Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 65, 2012 %T New Triangle-Ring UWB Bandpass Filter with Sharp Roll-Off and Dual Notched Bands %U https://publications.waset.org/pdf/6328 %V 65 %X This paper presents a new ultra-wideband (UWB) bandpass filter (BPF) with sharp roll-off and dual-notched bands. The filter consists of a triangle ring multi-mode resonator (MMR) with the stub-loaded resonator (SLR) for controlling the two transmission zeros at 2.8 / 11 GHz, the embedded open-circuited stub and the asymmetric tight coupled input/output (I/O) lines for introducing the dual notched bands at 5.2 / 6.8 GHz. The attenuation slope in the lower and higher passband edges of the proposed filter show 160- and 153-dB/GHz, respectively. This study mainly provides a simple method to design a UWB bandpass filter with high passband selectivity and dual-notched bands for satisfying the Federal Communications Commission (FCC-defined) indoor UWB specification %P 497 - 500