High frequency wave radiation system producing a rotating beam defining a predetermined geometrical pattern

摘要: An electromagnetic wave radiation system includes an array of stationary antenna elements, a multiplicity phase modulator units coupled to the source high frequency energy supplying array, and driving means activating same cause displacement rotation beam transmitted by elements. The may be discone assembly or elements in circular configuration, passive ferrite members located aperture antenna. comprise electromagnets below ground plane alternatively selectively energized in-phase shifted sine voltages. One group closely grouped around central generate cardioid pattern another arranged circle periphery multiple lobed pattern. Both groups activated simultaneously at different frequencies produce combined multiple-lobed