Abstract: In one embodiment, a horizontal antenna is mounted electrically separated from but near the top of a vertical antenna. For a given wattage and frequency and for two stations separated a known distance apart, the proscribed angle of elevation for ionospheric reflection for each station can be computed. The current and phase of the signal applied to the horizontal antenna can be adjusted to cancel the electromagnetic field waves emitted from the vertical antenna in the selected azimuth and angle of elevation. The cancellation effects waves of a certain angular orientation at the proscribed angle of elevation for ionospheric reflection.

Abstract: A method and apparatus for controlling reradiation from conductors, such as guy wires, by controlling the current distribution on the conductors, is provided. The invention comprises a cylindrical annular shaped sleeve that is positioned at predetermined distances along an electrically conducting structure to eliminate the reradiation caused by electromagnetic waves. The sleeve is made of a high magnetic permeability material, and a plurality of sleeves is positioned at predetermined spaced-apart distances along the conductor. The predetermined positioning of the sleeve renders the conductor electrically equivalent to a plurality of discrete cable lengths separated by insulators.