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Title: Synthesis and tuning algorithms for microwave cross-coupled resonator filters
Author: Al-Jayyoussi, Awni Bilal
Awarding Body: University of Birmingham
Current Institution: University of Birmingham
Date of Award: 2006
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An algorithm for the synthesis of microwave cross-coupled filters based on Control Theory has been developed. This has enabled a visualisation of the filter network using Signal Flow Graphs and made it possible to synthesise a wide range of filter topologies meeting arbitrary transfer functions. The model was also employed to establish a methodology to account for stray couplings in quartet filter sections. In parallel, an algorithm for extracting coupling parameters of microwave filters based on their parameters was also developed. The extraction method makes direct use of poles and zeros and hence does not require curve fitting or optimization routines. Distorting effects that cannot be accounted for in the coupling matrix are alleviated using vector rotations. These two analytical devices, for synthesis and tuning, are then used for two different applications; an X-band double passband filter realized using cylindrical wave guides and an L-band quadruplet microstrip filter in which stray couplings have been accounted for.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available