Title :
Ultra-wideband (UWB) bandpass filters using hybrid microstrip/CPW structures
Author :
Wang, Hang ; Zhu, Lei ; Menzel, Wolfgang ; Chen, Zhi Ning
Author_Institution :
Nanyang Technol. Univ., Singapore
Abstract :
A novel class of ultra-wideband (UWB) bandpass filters are reportedly constructed using the hybrid microstrip and coplanar waveguide (CPW) structure. Two types of multiple-mode resonators (MMRs) on CPW are configured to allocate their first three resonant frequencies at about the lower end, center and higher end of the UWB band. Then, a microstrip/CPW back-to-back coupling structure with enhanced degree is modeled to allocate its coupling peak around the center of this UWB band, i.e., 6.85 GHz. In final, two types of UWB bandpass filters with five poles are built up and realized with the passband covering the entire UWB band (3.1- 10.6 GHz). Simulated frequency responses and group delays are well verified by experiments over a wide frequency range. In addition, the designed UWB filter is found to only occupy one full-wavelength.
Keywords :
band-pass filters; coplanar waveguides; frequency response; hybrid integrated circuits; microstrip lines; resonators; ultra wideband technology; bandpass filters; coplanar waveguide structure; frequency responses; hybrid microstrip; multiple-mode resonators; ultra wideband filters; Band pass filters; Bandwidth; Coplanar waveguides; Delay; Frequency; Microstrip filters; Microstrip resonators; Passband; Resonator filters; Ultra wideband technology; UWB bandpass filter; hybrid microstrip/CPW and back-to-back coupling structure; multiple-mode resonator;
Conference_Titel :
Microwave Conference, 2006. APMC 2006. Asia-Pacific
Conference_Location :
Yokohama
Print_ISBN :
978-4-902339-08-6
Electronic_ISBN :
978-4-902339-11-6
DOI :
10.1109/APMC.2006.4429626
