The Research Of Horn Antenna Based On Symplectic Arithmetic

Horn antenna is a kind of aperture antennas. It is widely used in identification and imaging, concealing and anti- concealing, remote sensing, underground object detection and short distance wireless communication with high baud rate due to it's quality of wideband, small petal,and simple structure. Otherwise, horn antenna is widely used in microwave energy application apparatus. As the structure and the model are very complicated, it is not easy to analyze it in usual ways. The traditional methods use many approximation and assumption., and in order to get the precise results, we should find a new method.The symplectic arithmetic is a kind of Arithmetic that can maintain the structure of the Hamiliton system's symplectic structure, and can obtain the answers from Hamilton's equation. The analysis of both theory and numerical value tests show that this kind of method is better than classic method, especially in long time calculating, t can maintain the symplectic structure of former system after dispersing, this kind of structure can be steady and tracking for a long time, it can express the former system's quality on topology and stability, for this reason the syspethic method is evidently better than other methods.First, I use Hamilton system to analyze Horn antenna in electromagnetic. Beginning from the perfect application of Hamilton system in mechanics to describe the form and meaning of Hamilton system and also introduce the symplectic arithmetic which is used to solve Hamilton mate equation group. Based on this, Hamilton mate equation group is deduced. After dispersing the aperture field by FEM, the Hamilton synthesis operator array simplifies to Hamilton array. The dispersing process keeps the system's symplectic structure. After dispersing, the calculus of variations equation turn to FEM equation group and solve the equation group to gain the electromagnetic value.At last, I use a real example to show the process of caculating, and use MATLAB to obtain the results, and then compare it with the classic articles and the software Ansys Emax to test the results are correct and useful, finally analyze it's defect and the future design.In the last chapter, I use a microwave device that we designed and manufactured to show the use of microwave energy.