METHOD OF CONTROLLING PROPAGATION OF SHORT RADIO WAVES IN IONOSPHERIC WAVEGUIDE Russian patent published in 2011 - IPC H04B7/00 

FIELD: physics.

SUBSTANCE: method, which involves oblique-incidence ionospheric sounding with a short-wave signal using a transmitter, receiving sounding signal with a receiver, also employs a heating stand consisting of a vertical sounding station and a vertical radiation power transmitter. The vertical sounding station measures the height-frequency characteristic of the ionosphere over the heating stand, from which the heating frequency of the pumping wave is calculated. During operation, the vertical radiation power transmitter of the heating stand creates artificial small-scale magnetically oriented irregularities inside the ionospheric waveguide. Scattering on said irregularities enables output of a waveguide mode signal on the surface of the earth. The said signal is received by the receiver synchronously with the transmitted signal. The transmitter and the receiver of the sounding signal are broadband and the antenna directional pattern of the transmitter and the receiver is directed on the heating stand.

EFFECT: high reliability of long-range short-wave radio communication by controlling propagation of short radio waves in the ionospheric waveguide.

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