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The problem of plane electromagnetic wave diffracted by a conical structure with longitudinal slots is considered. The plane wave propagates along the cone axis. The problem solution method uses the Kontorovich-Lebedev transform and the analytical regularization procedure. It is shown, that the electromagnetic problem is equivalent to the solution of the linear algebraic equations systems for Fourie coefficients of scattered field components. The numerical algorithm for solving this system is constructed. Two cases of electromagnetic plane wave polarizations are considered. Scattered field patterns are given to investigate slot effects.

conical antenna; slots; plane wave diffraction; scattered field patterns