UHF ANTENNA AND SATELLITE RECEIVING ANTENNA

摘要

PROBLEM TO BE SOLVED: To reduce the size of an UHF antenna and accelerate spreading of ground wave digital broadcast by constituting the UHF antenna with a satellite receiving antenna. SOLUTION: The reflector 3 of a parabolic antenna is used as the reflector of the UHF antenna 10 by providing the UHF antenna 10 formed of a loop antenna to the arm 7 of the parabolic antenna. Moreover, a fixing unit 16 for fixing the UHF antenna 10 to the arm 7 is capable of adjusting directivity of the UHF antenna 10 with the structure allowing adjustment of tilt angle of the antenna element 12 to the reflector 3 in the horizontal and vertical directions. In addition, the power feeding unit 14 of the UHF antenna 10 is provided with a mixer for mixing the satellite receiving signal from the primary radiator (in more specifically, a converter) 9 of the parabolic antenna and the UHF receiving signal in view of achieving transmission of each receiving signal with only one coaxial cable. COPYRIGHT: (C)2006,JPO&NCIPI