| 摘要 |
PROBLEM TO BE SOLVED: To obtain a ground wave digital broadcasting relay system by which an unstable phenomenon where transmission radio wave creeps into a reception antenna is avoided in a repeater station without receiving the influence of topographical features in an installation place and also the influence of ghost interference is hardly received. SOLUTION: The system consists of the repeater station 2 which receives the broadcasting wave of the frequency f1 of a UHF band, which is transmitted from a master station 1, by a parabolic antenna 40, converts the receiving signal into the radio wave of the frequency f2 of an SHF band and transmits it by the parabola antenna 47 and a slave station 3 which receives radio wave transmitted from the repeater station 2 by the parabolic antenna 50, converts the received signal into the frequency f1 being equal to broadcasting wave from the master station 1 and transmits it. |
