Analysis and Design of Substrate Integrated Wavguide Filters Using Contour Integral Method

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Shahvirdi, Taha | 2010

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 40812 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Banai, Ali
Abstract:
In this thesis a substrate integrated waveguide (SIW) filter is designed and constructed using the contour integral method. A substrate integrated waveguide can overcome the drawbacks of regular waveguides, namely bulkiness, high costs and the difficulty to be integrated with other elements in high frequencies. In planar structures with arbitrary shapes where green’s functions aren’t available, we can use the contour integral method to construct the impedance matrix. Because the SIW structure supports TEn0¬ modes, we can consider SIW as a planar structure and thus use the contour integral method. Regular filter structures are usually analyzed using the FEM method (with HFSS) or the FIT method (using CST). These methods are time consuming and require large amounts of memory. In this thesis to cut down on computational costs, square vias are used instead of circular vias in the analysis of the SIW structure. Also the optimum dimensions of these square vias are determined. Results of our analysis are compared with HFSS simulation and measurement results and good agreement between them is observed.
Keywords:
Contour Integral Method ; Microwave Band Pass Filter ; Substrate Integrated Waveguide Structure

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