In this paper analysis and simulation ofthe eigen-mode fields of two sandwich coupledslot-lines with ferrite and dielectric layers arecarried out by using the finite element methodwith edge elements. Based on the analysis andsimulation, different devices such as switches andfour-port circulators, as well as directionalcouplers could be constructed by selecting theappropriate operating frequency, coupling lengthand bias magnetic field.

In this paper, finite-element method (FEM) formu- lations with edge elements for directly calculating the phase con- stants of ferrite-loaded waveguides with arbitrarily magnetized directions are presented. Dispersion characteristics are calculated for the partially-filled ferrite rectangular waveguide structure, where the dc field is in any arbitrary direction including parallel to any of the three axes. The variation of phase constants with the direction of dc magnetic field is illustrated. In order to solve the quadratic eigenvalue equation, which appears in the case where the magnetized direction is not parallel to the propagation, a simple and effective approach is proposed with no increase in the size of the matrices.

In this paper a detailed analysis of asandwich coupled slotline with axially or transverselymagnetised ferrite layer has been carried out by usingFEM with edge elements. Comparison of dispersioncharacteristics and phase shift shows that the variablereciprocal phase shift is larger with axial bias fieldthan with transverse field, and that non-reciprocalphase shift per unit length (with transverse field) in-creases with frequency whereas reciprocal phase shiftper unit length (with axial field) decreases with fre-quency. Also conductor-backed coplanar structuresmaybe more suitable than suspended structures.

In this paper, the finite element method incorporated with Floquet theorem is used to solvethe 2-Dimentsional scattering problem of dielectric periodic structures that a plane wave is oblique orperpendicular incident. Comparisons of reflection and transmission properties for a kind of dielectricPhotonic Crystals with different structure parameters are nresented..

Hybrid solution of finite element method (FEM) and fast multipole Algorithm (FMA) for transversally anisotropic inhomogeneous cylinders is presented. FMA is used to solve the integral equation to reduce the computing time and computer memory needs in electrically large objects and FEM to deal with anisotropic medium region. The accuracy and efficiency of the method are verified by numerical results.

Practical implementation of three dimension fast multipole method depends on theparameter settings include group number, multipole number and approximate integral etc. A simpleformula is derived so that the accuracy and efficiency of the method versus parameters can be easilyinvestigated. The guideline of the parameter setting is discussed and verified by numericalexamples.

In this paper, the interaction between plasma and electromagnetic waves is studied. Itdemonstrates that high reflection coefficient requires low collision frequency and high plasmadensity. If its density is overdensed, the scattering characteristics of nonmagnetized collisionlesscold plasma and uletal conductor are comparable. As an example, the parameters of a plasmasphere with required RCS is given. The scattering characteristics of plasma with a large spacescale are also discussed.

A fast hybrid method--hybridedge-element method and fast multipole algorithm(FEM-FMA) is presented to analyzeelectromagnetic scattering by three-dimensionalanisotropic inhomogeous objects in this paper. Thematrixes formed from FEM are symmetric and thefast multipole algorithm is applied to accelerate thetraditional method of moment. The accuracy andefficiency of the method are verified by 3-Dnmnerical examples.

This paper presents a summary description of a Mobile SatelliteCommunication System based on general Smallsat Platforms (MSCGSP). MSCGSPis a proposed system with communication and positioning functions, which willintegratively utilize satellites in GEO, MEO and LEO to provide 24-hour continuemobile communication and positioning and navigate services for all domestic regionof China (including sea area) and most of global region. A key concept of MSCGSPis the utilization of general small-satellite platforms (GSP).Technical Subject Satellite and Space Communication Analysis and Techniques.