Study On Permanent Magnetic Circuit Of Radial Polarization

The permanent magnetic circuit is important for modem microwave tube design .In this paper the permanent magnetic circuit design is researched and analysed by theory, calculational simulation and experiment.First, we make the basic need of magnetic circuit clearly, present the theory formulation for permanent magnetic circuit of radial polarization using the method of analyzing the theory of magnetic circuit of axis polarization, and program the calculational programme to simulate the magnetic field of magnetic circuit applying finite difference method. Then we continue to study using the adult soft of FEMM of calculation magnetic circuit magnetic field, consider many factors affecting it, get a great lot of data and curves, give some better magnetic circuit structures for reference at our laboratory. In the end, with the condition of our lab, we measure the permanent magnetic circuit completed, then the experimental and calculational simulation results have been discussed and analyzed.