| 摘要 |
PURPOSE:To improve S/N, to uniformize a reception level and to prevent the interference between signals by using a booster constituted integratingly by a transmission/reception exclusive antenna and an amplifier as a repeater. CONSTITUTION:Boosters 11-13 comprising reception exclusive amplifier are provided with antennas 11A-13A of equal length and boosters 21-23 comprising transmission exclusive amplifier are provided with antennas 21A-23A of equal length respectively. The boosters 11 and 21, 12 and 22, and 13 and 23 constitute respectively a couple of repeaters and the repeaters are connected in cascade by coaxial cables 31, 32 of a prescribed length for exclusive reception and transmission. Thus, the dispersion in the transmission/reception level caused by the unarrangement of distance from the antenna till the repeater is eliminated, the band noise is reduced by making the band width narrow to improve the S/N. Moreover, since the system consists of transmission/reception exclusive repeaters and the coaxial cables, the interference between the signals is prevented.
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