Synthesis and Design of Ultra-wideband Bandpass Filters

• Main Author: KHALID, SOHAIL
• Format: Thesis
• Language: English
• Published: 2013
• Subjects: Instrumentation and Control
• Online Access: http://utpedia.utp.edu.my/22499/1/2013%20-ELECTRICAL%20%26%20ELECTRONICS%20-%20SYNTHESIS%20AND%20DESIGN%20OF%20ULTRA-WIDEBAND%20BANDPASS%20FILTERS%20-%20SOHAIL%20KHALID.pdf; http://utpedia.utp.edu.my/22499/

This work presents a novel synthesis procedure for designing Ultra-wideband (UWB) bandpass filters. Based on the desired filter specifications, filter topology is selected. Distributed equivalent circuit of selected topology is extracted. Due to narrowband approximations, narrowband synthesis filter theory cannot be applied on UWB filter designs. Hence, there is a scope for development of exact synthesis theory for UWB bandpass filters. Filtering function is calculated from the distributed equivalent circuit model. In this work, the synthesis procedure is implemented on quasi-Chebyshev type filtering function. Synthesis is done on the calculated filtering function by setting specific goals derived from the given specifications. In this way, the filtering function unknowns are achieved which are later used to calculate the optimum solution for filter characteristic impedances.