Abstract
The hf wave field near a focus in an inhomogeneous medium is described by a recurrent system of equations the solutions of which are matched with various incoming and corresponding outgoing waves. In particular, a homocentric diaphragm ray solution is considered.
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Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 62, pp. 126–136, 1976.
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Kiselev, A.P. Electromagnetic field in a neighborhood of a focus. J Math Sci 11, 744–752 (1979). https://doi.org/10.1007/BF01455053
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DOI: https://doi.org/10.1007/BF01455053