Excitation of the Light Line Mode with Metamaterials Composed of Parallel Conductors Based On Equivalent-Circuit Model Including Retarded Electromagnetic Coupling

This paper clarifies the characteristics of parallel conductors and the mechanism for the phenomenon at the light line. By analyzing parallel conductors with an equivalent circuit model including retardation, the singularity at the light line is clarified. Using this singularity, it is possible to excite the light line mode specifically and form a beam with a sharp directivity.