| 摘要 |
A two-way relay system for an identical radio frequency is provided to bi-directionally transmit and receive a single radio frequency by installing leakage coaxial cables or antennas at a shadow area and arranging a two-way repeater at a propagation shadow area, which exists between the leakage coaxial cables or the antennas. A two-way repeater(100) comprises the first and second duplexers(101,111), the first and second BPFs(Band Pass Filters)(102,109), a limiter(103), a level regulator(104), a pre-amplifier(105), a directional coupler(106), an auto gain controller(107), and a main amplifier(108). The first duplexer(101) comprises the first port(1001), the second port(1002), and the third port(1003). The first duplexer(101) divides radio signals of an identical radio frequency, received to the first port(1001), into Tx signals and Rx signals through isolation. The Tx signals are transmitted to the first BPF(102) through the second port(1002). The first BPF(102) filters the Tx signals, received through the second port(1002), and outputs a radio frequency of a preset band only. The Tx signals, transmitted through the first BPF(102), are inputted to the pre-amplifier(105). The pre-amplifier(105) amplifies the Tx signals and forwards them to the directional coupler(106). The directional coupler(106) delivers the Tx signals to the auto gain controller(107) or the main amplifier(108) according to the input levels of the Tx signals.
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