Primary radiator having improved receiving efficiency by reducing side lobes

摘要: A radiation section of a dielectric feeder protrudes from an opening waveguide to improve the efficiency receiving radio signals. An is provided at one end waveguide. held within has protruding opening. annular wall having bottom surrounds The depth about ¼ wavelength waves, and width surface ⅙ {fraction (1/10)} waves. Consequently, phases current that flows toward which open are substantially out phase. As result, side lobes received signals greatly reduced, gain main lobe increased, improving reception waves transmitted satellite.