COMPLEX REFLECTOR ANTENNA DEVICE

摘要

PURPOSE:To prevent the deterioration of the radiation pattern near the axis within the specified pattern as well as to realize the wide-angle radiation pattern by improving the peripheral part of the secondary reflector of the complex reflector antenna device possessing the main and secondary reflectors plus the primary radiator system. CONSTITUTION:For the structure of the complex reflector antenna device possessing the main and secondary reflectors featuring the symmetric rotation plus the primary radiator system, the ambient curve of secondary reflector 2 is used as the line identifying surface doubling the semi-curve, and then magnifier glass surface part 3 is formed by securing angle alpha for the angle formed by the straight line parallel to the center axis of reflector 2 and the above mentioned curve. Then the function of curve coordinate t provided along the ambient curve of reflector 2 is given so that angle alpha may have a sudden change into the specified direction when a circulation is given for coordinate t along ambient curve of reflector 2. Then the electric waves hit surface 3 are dispersed in a wide range and in the direction where angle alpha has a sudden change. Thus the the side lobe level emerging to the radiation pattern is lowered down in order to secure the radiation for the wide-angle radiation pattern.