Ring scanning antenna adapted for flush mounting

Claim 1

AN ANTENNA ADAPTED TO LAUNCH WAVES OF DIRECTIONAL MICROWAVE ENERGY, SAID ANTENNA COMPRISING FIRST, SECOND, AND THIRD PARALLEL PLATE WAVEGUIDES WHEREIN ELECTROMAGNETIC ENERGY FLOWS ALONG GEODESICS ON A SURFACE MEDIAN TO THE PARALLEL PLATES COMPRISING EACH WAVEGUIDE, EACH OF SAID PLATES OF SAID FIRST AND SECOND WAVEGUIDES BEING SHEETS OF ELECTRICALLY CONDUCTIVE MATERIAL CONFORMABLE TO A CIRCLE, EACH OF SAID PLATES OF SAID FIRST AND SECOND WAVEGUIDES BEING DISPOSED RELATIVE TO THE OTHERS IN A RESPECTIVE PARALLEL PLANE WITH AT LEAST THE TWO OUTERMOST PLATES BEING CENTRALLY APERTURED, EACH OF SAID PLATES OF SAID THIRD WAVEGUIDE BEING OF ELECTRICALLY CONDUCTIVE MATERIAL AND CONFORMABLE TO A SURFACE OF GENERALLY CYLINDRICAL SHAPE, THE CYLINDERS BEING CONCENTRIC AND OF DIFFERENT DIAMETER, THE LONGITUDINAL AXIS OF THE CYLINDERS COINCIDING WITH THE AXES OF THE SHEETS COMPRISING SAID FIRST AND SECOND WAVEGUIDES, SAID THIRD WAVEGUIDE INTERCONNECTING THE ENTIRE OUTER CIRCUMFERENCES OF SAID FIRST AND SECOND WAVEGUIDES, THE INNER CIRCUMFERENCE OF SAID FIRST WAVEGUIDE BEING ADAPTED TO RECEIVE DIRECTIONAL MICROWAVE ENERGY DIRECTED THERETO THROUGH THE APERTURE IN SAID OUTERMOST PLATE THEREOF, AND THE INNER CIRCUMFERENCE OF SAID SECOND WAVEGUIDE BEING ADAPTED TO RADIATE SAID MICROWAVE ENERGY THROUGH THE APERTURE IN SAID OUTERMOST PLATE THEREOF.