Synthesis of Ultra-Wideband (UWB) Bandpass Filter with High-Performance

Author

Chen, Chun-Ping ; Nagaoka, Naoki ; Ma, Zhewang ; Anada, Takahisa

Author_Institution

Dept. of Electron. & Inf. Eng., Kanagawa Univ., Yokohama

fYear

2008

fDate

10-12 Sept. 2008

Firstpage

363

Lastpage

366

Abstract

In this paper, a high-performance ultra-wideband bandpass (UWB) filter consisting of two short-circuited stubs combined with two-stage of stepped impedance resonators (SIRs) is proposed to meet FCC´s specifications. The filter is first designed by newly-presented synthesis scheme, then optimized by EM simulator, fabricated in microstrip line and finally characterized by network analyzer. The experimental filters responses compare very well with the theoretical ones, which successfully validates our synthesis techniques. In addition, the designed filter exhibits good characteristics of low insertion loss, quite sharp skirts, flat group delay, deep attenuations in stopband (especially in lower one) and well-satisfies even FCC outdoor specifications. It should be note that the proposed filter prototype can be also used to realize a UWB filter with an FBW even greater than 110%.

Keywords

band-pass filters; circuit simulation; microstrip filters; network analysers; network synthesis; resonator filters; ultra wideband technology; EM simulator; UWB bandpass filter; filter synthesis; group delay; insertion loss; microstrip line; network analyzer; short-circuited stubs; stepped impedance resonator; ultra-wideband filter; Analytical models; Band pass filters; Delay; Design optimization; Impedance; Insertion loss; Microstrip filters; Network synthesis; Resonator filters; Ultra wideband technology;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2008 China-Japan Joint

Conference_Location

Shanghai

Print_ISBN

978-1-4244-3821-1

Type

conf

DOI

10.1109/CJMW.2008.4772446

Filename

4772446