| The purpose of this research project is to design and develop a substrate integrated waveguide (SIW) cavity band-pass filter with pseudo elliptic function response.; To design a narrow-band coupled cavity filter, the fundamental step is to create the synthesis platform of coupling matrix. In this work, an advanced analytical gradient-based optimization technique has been used for the coupling matrix synthesis.; In the SIW design scheme, a planar waveguide cavity coupling (H-plane) topology was considered and deployed, therefore, an innovative coupling method based on the use of cavity transformation properties with a compact configuration of TE102/TE201, mode cavities has been used. This flexible coupling scheme permits the design of a topology with the filter input and output placed on the same side, which further decreases the overall structure size.; A commercial software package HFSS was used to simulate the initial physical dimensions of resonance cavities and coupling slots, and it was also used to achieve the design tuning process. Finally, a mode-matching technique based optimization process has been used for the asymmetric cross-coupling structure, which was shown to be a much more powerful and appropriate technique in the design of complex and tuning-free filter. (Abstract shortened by UMI.)... |
