基片集成波导层叠级联双模滤波器设计和制作-design and fabrication of substrate integrated waveguide cascade dual-mode filter.docxVIP

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基片集成波导层叠级联双模滤波器设计和制作-design and fabrication of substrate integrated waveguide cascade dual-mode filter.docx

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基片集成波导层叠级联双模滤波器设计和制作-design and fabrication of substrate integrated waveguide cascade dual-mode filter

AbstractWith the development of modern microwave and millimeter wave technology, a combination technology of microwave transmission technology microstrip line with traditional metal rectangular waveguide named substrate integrated waveguide (SIW) have been widely applied by scholars and researchers.This structure uses the metallichole in the dielectric substrate to achieve a field of the waveguide propagation mode. SIW is between microstrip and dielectric-filled waveguide transmission line, which take into account the advantages of traditional metal rectangular waveguide and microstrip transmission line such as small size, low power cost, high Q value and it is very convenient to integrate SIW with the other microwave microstrip transmission structure.In this thesis, the transmission characteristics of the substrate integrated waveguide is studied and introduced firstly. Then it describes how to use the equivalent of the traditional rectangular waveguide to design substrate integrated waveguide cavity, and then through the introduction of a perturbation technique to design single cavity substrate integrated waveguide dual-mode band pass filter. In order to further improve the performance of the filter, the cascading technology of a single cavity structure is analysised and designed, the vertical cascade structure of the two cavity are mainly designed. One is to use the slit in the metal layer shared between the upper and lower cavity to achieve a cascading effect, and the other is to use the metal through-hole between the upper and lower cavities to achieve a cascade of two cavities. After the design and simulation of these two structures, both structures have been processed and tested. The measurement results show that the cascade structure used the slit has an insertion loss of-1.5dB at the center frequency of 2.5GHz, the relative bandwidth is 4% and the lowest passband S11 reaches-15dB,out-band suppression reaches-40dB; the cascade structure used the the metal t