FREQUENCY SHARING ANTENNA AND ARRAY ANTENNA

摘要

PROBLEM TO BE SOLVED: To provide a multi-frequency sharing antenna having an independent system parameter. SOLUTION: Two sets of radiation parts composed of a reflector 1 and two first radiators 2 are located at the interval almost half the free space wavelength of a first frequency for radiating the first frequency are proximately located and combined so that main radiation directions can be mutually different by 45 deg. or greater, a second radiator 3 of a second frequency is located in the direction of equally bisecting the angle formed by the main radiation directions of the respective radiation parts, and a distance to the radiator and to the closest ends of the reflector of the radiation part is made almost 1/4 of the free space wavelength of the second frequency.