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Investigation of mircowave tri-resonator structures

Gerba, Negassa Sori (2012)
M.Res. thesis, University of Birmingham.

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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:M.Res. thesis.
Supervisor(s):Lancaster, M.J.
School/Faculty:Colleges (2008 onwards) > College of Engineering & Physical Sciences
Department:School of Electronic, Electrical and Computer Engineering
Subjects:TK Electrical engineering. Electronics Nuclear engineering
Institution:University of Birmingham
ID Code:3294
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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