Infinite elements and base functions for rotationally symmetric electromagnetic waves

The finite-element method is applicable to infinite domains if the outermost 'finite' elements are infinite and their base functions satisfy the boundary conditions at infinity. Appropriate infinite elements fitted to triangular or quadratic finite-element net and corresponding base functions satisfying Sommerfield's radiation condition of electromagnetic waves are introduced. The application of the defined infinite elements is illustrated for the problem of the radiation of a coaxial cable to a half-space. The results are in very good agreement with those found in the literature.<
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