Key Technologies Of Millimeter-wave Holographic Quasi-optical Power Combining System

Holography is widely cognized and applied in traditional optics domain. Recently it is imported into millimeter domain, and is effectively used in millimeter-wave quasi-optic power combining system. Based on holography theory and scalar diffraction theory, Talbot phasic grating, which has high diffraction efficiency and low ullage characteristic, is manufactured to accomplish quasi-optic power combining.Chapter 1 introduces the development history and the problems of millimeter-wave power combining technology. Then we investigate the research progress of some early quasi-optic power combining technologies.Chapter 2 introduces the principle of millimeter-wave holographic quasi-optic power combining technology. When using holography technology into quasi-optic power combining system, it can actualize power dividing and combining. This chapter detailedly develops the design project of millimeter-wave holographic power combining system and introduces the whole framework and work flow of the system.The system is a complicated electromagnetic structure and it contains many important parts. These parts, including horn antenna, paraboloid antenna and Talbot phasic grating, realize significant functions in the system. Chapter 3 introduces the design project of the partial-feeding paraboloid antenna system, which is made up of a horn antenna and a paraboloid antenna and fulfills the Gaussian beam transforming to plane wave. This chapter describes amply the design process of the horn antenna and paraboloid antenna, and uses electromagnetic emulator HFSS to make modeling and electromagnetic analysis of the model, educing a good result.Chapter 4 firstly analyzes the Talbot phenomenon that periodic objects have. When using this theory to binary optic device, periodic-medium-phasic Talbot grating could be produced. This chapter analyzes the principle and method of the design of Talbot grating in theory and shows the diffracting efficiency of this kind of binary grating. Based on the binary optic theory and scalar diffraction arithmetic, we use programme to design two-rank and multiple-rank Talbot gratings and analyze their performance.In Chapter 5, the thesis is summarized. And the improvability and potential applications of millimeter-wave holographic quasi-optic power combining technology are forecasted.