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Microwave communication and radar systems that employ a blazed microwave reflection grating are disclosed in which the grating comprises an array of electrical conducting scattering elements having plane parallel surfaces that face in the same direction. The plane parallel faces are positioned in pa

Microwave communication and radar systems that employ a blazed microwave reflection grating are disclosed in which the grating comprises an array of electrical conducting scattering elements having plane parallel surfaces that face in the same direction. The plane parallel faces are positioned in parallel equally-spaced planes to provide a generally stair-step, or Venetian-blind type structure. Microwave energy beamed onto the plane parallel surfaces of the array exits at a diffraction-mode angle within the reradiation pattern of the individual scattering elements of the array. Frequency steering of the exit beam in one plane of the array is provided by varying the frequency of the illuminating beam.

대표청구항 ▼

A microwave communications system for transmitting information from a transmitting station to a receiving station that may be out of line-of-sight of each other, the system comprising a microwave reflection grating that is within line-of-sight of said transmitting station and said receiving station,

A microwave communications system for transmitting information from a transmitting station to a receiving station that may be out of line-of-sight of each other, the system comprising a microwave reflection grating that is within line-of-sight of said transmitting station and said receiving station, said microwave reflection grating comprising a unitary sheet of conducting material formed with a succession of alternating equal-angle bends to form a substantially stair-step structure, said stair-step structure including a plurality of electrical conducting scattering elements having plane parallel surfaces that face in the same direction, means for positioning the scattering elements with the plane parallel surfaces thereof in parallel substantially equally spaces planes, and means for beaming microwave information-bearing energy from said transmitting station onto the plane parallel surfaces of the scattering elements of the grating from which surfaces energy is reradiated, the frequency and incident angle of the incident microwave beam on the surfaces providing for energy exit from the grating in the direction of said receiving station at a diffraction-mode angle within the reradiation pattern of the individual scattering elements of the grating, said microwave transmitting station comprising a variable frequency transmitter for beam steering of energy exiting from said grating.