Title :
Analysis and optimization of ultra-wideband bandpass filters on coplanar waveguide
Author :
Gao, Jing ; Zhu, Lei
Author_Institution :
Nanyang Technol. Univ., Singapore
Abstract :
This paper presents a novel class of ultra-wideband (UWB: 3.1~10.6 GHz) bandpass filters formed on coplanar waveguide. Open-/short-circuited multiple-mode resonators (MMR) are constructed with three distinctive sections and their resonant performances are studied towards allocating the first three resonant modes occurring around the lower-end, center and higher-end of the concerned UWB passband. In parallel, the two parallel-coupled lines with short-/open-circuited ends are characterized to excite two coupling peaks below and above the UWB´s center (6.85 GHz). These two UWB filters are then analyzed using a simple cascaded transmission-line network and optimized using the Momentum software, theoretically demonstrating a five-pole UWB passband performance. Predicted results are confirmed in experiment and they show the actual 2.8- to 10.2-GHz UWB passband with the insertion loss <1.5 dB and variation in group delay <0.33 ns.
Keywords :
band-pass filters; coplanar waveguides; electrical engineering computing; resonators; transmission line theory; ultra wideband technology; Momentum software; UWB filters; coplanar waveguide; frequency 3.1 GHz to 10.6 GHz; multiple-mode resonators; simple cascaded transmission-line network; ultra-wideband bandpass filters; Band pass filters; Coplanar waveguides; Couplings; Insertion loss; Passband; Performance analysis; Resonance; Software performance; Transmission lines; Ultra wideband technology; UWB bandpass filter; Ultra-wideband; coplanar waveguide; 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.2006.4429371