COMPLEX REFLECTOR ANTENNA DEVICE

摘要

PURPOSE:To prevent the deterioration of the radiation pattern near the axis and within the fixed plane as well as to realize the radiation for a wide-angle pattern by improving the structure at the periphery of the secondary reflector of the complex reflector antenna comprising the main and secondary reflectors plus the primary radiator system. CONSTITUTION:Secondary reflector's center part 2a and secondary reflector's peripheral part 2b form the secondary reflector of the complex reflector antenna incorporating the main and secondary reflectors containing the primary radiator system. Part 2b is turned to the line identifying surface of the bus formed by angle alpha of the specified direction with the ambient curve of part 2a used as the semicurve. And differential coefficient dalpha/dt concerning curve coordinate t and angle alpha is made discontinuous in one or more than one unit when a circulation is given along the ambient curve, thus preventing the electric waves from going toward the specified direction. As a result, no effect is caused within the plane corresponding to the discontinuous direction for dalpha/dt as a radiation pattern, thus securing the radiation for a wide-angle pattern.