Investigation of mircowave tri-resonator structures

Gerba, Negassa Sori (2012). Investigation of mircowave tri-resonator structures. University of Birmingham. M.Res.


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In this thesis a clear synthesis technique to design a power splitter based on three resonators is introduced. A new analytic synthesis method is developed to investigate a coupled resonator structure with only three resonators and three ports. The general formulae to calculate the coupling coefficients between resonators are analytically derived. This method avoids the use of the polynomial synthesis technique.

The mathematical analysis is extended for the realisation of an asymmetric frequency response of a trisection filter. A simple mathematical function with a minimum number of parameters is developed which can be used as a cost function when using optimisation. These parameters are coupling coefficients and external quality factors, and are called control variables. A coupling matrix optimisation technique is used to obtain optimised values of control variables to realise an asymmetric frequency response of a trisection filter. The optimisation algorithms effectively reduce the cost function, and generate appropriate values of control variables when the function is minimised.

Type of Work: Thesis (Masters by Research > M.Res.)
Award Type: Masters by Research > M.Res.
College/Faculty: Colleges (2008 onwards) > College of Engineering & Physical Sciences
School or Department: School of Engineering, Department of Electronic, Electrical and Systems Engineering
Funders: None/not applicable
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering


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