Compact differential ultra-wideband bandpass filter based on transversal filter concepts

Author

Feng, Wenjie ; Che, Wenquan ; Eibert, Thomas F. ; Xue, Quan

Author_Institution

Dept. of Commun. Eng., Nanjing Univ. of Sci. & Technol., Nanjing, China

fYear

2011

fDate

10-13 Oct. 2011

Firstpage

456

Lastpage

459

Abstract

A compact differential ultra-wideband (UWB) bandpass filter with high selectivity based on transversal filter concepts is proposed in this paper. Two transmission zeros and good harmonic suppression can be achieved for the differential mode, due to the two transmission paths with different lengths for input/output ports. Four quarter-wavelength shorted lines are added to improve the passband transmission characteristic for the differential mode. In addition, the common mode can be suppressed easily in the whole frequency band. A prototype with fractional bandwidth 101% and return loss greater than 16.5 dB for differential mode is designed and fabricated; the measured results show good agreement with the theoretical expectations.

Keywords

band-pass filters; transversal filters; ultra wideband technology; UWB filter; compact differential ultrawideband bandpass filter; fractional bandwidth; harmonic suppression; passband transmission characteristic; quarter-wavelength shorted lines; transmission paths; transmission zeros; transversal filter concepts; Band pass filters; Filtering theory; Loss measurement; Microwave filters; Passband; Transversal filters; Ultra wideband technology; Ultra-wideband (UWB); common mode; differential mode; transmission zeros; transversal filter concepts;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference (EuMC), 2011 41st European

Conference_Location

Manchester

Print_ISBN

978-1-61284-235-6

Type

conf

Filename

6101681