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Magnetic tunable left-handed material composed of ferrite-dielectric and metallic mesh is proposed and verified. We discuss the variation of electromagnetic parameters due to the change of three flexible geometry parameters: the lattice constant, the line width of the mesh, and the thickness of dielectric. The mesh affects the permittivity but does not affect the frequency range of negative permeability,...
Based on the analysis of working mechanism of microstrip coupler, a new microstrip coupler with EBG structure has been proposed. The coupling degree of the new coupler is greatly enhanced due to the EBG structure. The coupler is demonstrated by the experiment and the measured coupling coefficient is in good agreement with the simulation results. The new coupler has the advantages of strong coupling...
We introduce a new numerical method, based on plane-wave expansion method, to calculate the band structures of 2-dimensional periodic structures made of dispersive medium. As an example, we calculated band diagram of magnetic photonic crystals with dispersive permeability by the method. The results are the same as the other methods, but our method is highly convergent so saves a lot of running time...
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