| 摘要 |
PURPOSE: A frequency conversion device of a ground repeater for satellite broadcasting is provided to retransmit plural signals of a multi-satellite to a transmission antenna by rearranging the retransmitting signals without frequency interference. CONSTITUTION: A frequency conversion device of a ground repeater for satellite broadcasting includes a first receiver for amplifying a vertically polarized wave between 12.2GHz and 12.75GHz of the first multi-satellite and transmitting only the necessary vertically polarized wave to an RF coupler(144). The frequency converter of the ground repeater for satellite broadcasting includes a second receiver, a third receiver, and a fourth receiver. The second receiver is used for amplifying a horizontally polarized wave between 12.2GHz and 12.75GHz of the first multi-satellite, mixing the horizontally polarized wave with an oscillation signal of 2GHz of a local oscillator(500), and transmitting a mixed signal to the RF coupler. The third receiver is used for amplifying a vertically polarized wave between 12.2GHz and 12.75GHz of the second multi-satellite, mixing the vertically polarized wave with an oscillation signal of 1GHz of the local oscillator, and transmitting the mixed signal to the RF coupler. The fourth receiver is used for amplifying a horizontally polarized wave between 12.2GHz and 12.75GHz of the second multi-satellite, mixing the horizontally polarized wave with the oscillation signal of 1GHz of the local oscillator, and transmitting the mixed signal to the RF coupler.
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