| 摘要 |
PROBLEM TO BE SOLVED: To stably re-emit a signal at an almost fixed output level even when the input level of a broadcast signal to be received fluctuates regarding a retransmission antenna for retransmitting a received satellite broadcast signal and a satellite signal retransmission system that uses the retransmission antenna. SOLUTION: An AGC (automatic gain control) amplifier 20 receives a mobile broadcast signal emitted from a mobile broadcasting satellite and a gap filler in 2. 6 GHz and received by a reception antenna 2 through a signal cable 9. The AGC amplifier 20 performs waveform shaping the mobile broadcast signal received by the AGC amplifier 20 into a signal of 2. 6 GHz again and amplifies the resulting signal to a predetermined output level. The AGC amplifier 20 sends the mobile broadcast signal to a retransmission antenna part 8 through a signal cable 21, and the retransmission antenna part 8 re-emits the mobile broadcast signal as a retransmission signal of 2. 630 to 2. 665 GHz that is the same frequency band as that of the frequency of the mobile broadcast signal emitted from the mobile broadcasting satellite and the gap filler into a blind area 17. COPYRIGHT: (C)2006,JPO&NCIPI
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