New Triangle-Ring UWB Bandpass Filter with Sharp Roll-Off and Dual Notched Bands

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

• Hung-Wei Wu
• Yung-Wei Chen
• Yu-Fu Chen
• Cheng-Yuan Hung

• steeply slopes transition band
• bandpass filter
• ultra-wideband (UWB)
• triangle-ring
• multi-mode resonator
• stub-loaded resonator.

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