The Electromagnetic Characteristics Of The Two-dimensional Metal Photonic Band Gap Structure And The Magnetization Of Moving Plasma

In this dissertation it included the metal two-dimensional photonic band gap consisting of a skew lattice and dispersion relation of magnetized motional plasma, and based on these study a novel structure and a new focused mechanism of microwave vacuum electronic devices are explored for improved of out power, frequency and efficiency.One is called photonic band gap (PBG) microwave vacuum device (MVD)with novel structure substituting periodic dielectric or metallic cylinder to conventional structures. The structure with excellent selected mode have larger dimension, higher out power, input coupler and easer fabrication, so PBG MVD are very promising. The real space transfer matrix method (TMM) in a noorthogonal coordinate system is presented to study the 2D metal photonic band gap structure consisting of a skew lattice. A general formulation to calculate the complete band gap structure is derived for TE and TM modes, and the influences of the filling fraction, skew angle and cross section of the metal rod on band gap are analyzed. The results are good agreed with those by other methods for some special case. In the 4th chapter detailed derivations, and numerical calculation for square and triangular lattice and any kind of skew angular, thorough choosing across section, skew angular and fill fraction global photonic band gaps have calculated, it is promising application for MVD.Another is new Ion focused radiation. In the process of the transport of relativistic electron beam (REB) in plasma, Space charge effect by background ions cause focuses of REB, so radiation can be arisen with frequency higher plasma frequency. Used this focused mechanism weight of devices, out power, work frequency and intensity of REB will be improved. Actually, the system about interaction among beam, plasma and wave can be treated to special moving plasma. In 6^th chapter electromagnetic characteristic of moving magnetized plasma (MMP) is studied. Both the beam-wave interaction in ion background and the dielectric characteristics of MMP with collision effect are studied by using the micro-disturbed theory of charge fluid, and therefore the 3D dielectric tensor of MMP is deduced in present the work. Research shows that MMP have many interesting and important characteristics it is very significant for ion focusing radiation. The dispersion relations arr varied with plasma density, external magnetic field, and fixed velocity of electrons, coulomb collision effect between beam and ion.