Title :
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
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;
Conference_Titel :
Microwave Conference, 2008 China-Japan Joint
Conference_Location :
Shanghai
Print_ISBN :
978-1-4244-3821-1
DOI :
10.1109/CJMW.2008.4772446
