| With the development of wireless technology, antenna technology are widely used in all sorts of domains, such as outer space ship, scientific detecting station, the globe observation station, communication satellite, broadcasting television. The aperture plane antenna is one of the important parts of plane antenna. The traditional method is adopted in the study of aperture plane field, which is based on plane antenna approximative theory. With this way, all kinds of approximative condition are supposed, and the accuracy is lowered. New method can be adopted for improving the calculating accuracy.Horn antenna is one of the important aperture plane antenna In this question for study, electromagnetic field is guided in a Hamiton system and a kind of circular cone loaded with medium is analyzed in Hamiton system. This horn antenna model has the character of a wide band of frequencies and lower auxiliary valove. Because of the complexity of the model, the general way is hard to be used to analyze it. As a new trying way in theory, the method which is put forward in this thesis is contrasted with other methods, the validity is confirmed about the new method.The design of several aperture plane antennas is very important in antenna enginneering. In the radiating study of several aperture plane antennas, the whole plane array is considered as a boundary. With this way, the consideration of mutual between aperture can be avoided, which is very hard to analyze. More accuracy result can be shown with this way. Electromagnetic wave propagation in medium can use the method of eigen-function expansion in the Hamiltonian system, the eigen-parameter can be gotten with the method of symplectic geometric algorithm At last, according the continuity of crosswise field, the much modes result in the waveguide and eigen-result combine and the equation can be shown. Although analyse is complicated, it is effective for such a system. On the basis of this theory, the design can be done well. |
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