Dual frequency feed horn using notched fins for phase and amplitude control

摘要: A dual frequency band horn-type antenna feed is described which has primary application to optimally illuminate a parabolic cylindrical reflector operating simultaneously at high power in both of the two bands. The principle invention applicable any bands regardless their separation including coincidence as limiting case. basic requirement such that it must be directive possible within constraint aperture size plane cylinder axis because does not collimate beam this and relatively nondirective parabola for efficient illumination reflector. This requires phase front controlled small fraction wavelength frequencies.