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    • 9. 发明授权
    • Regenerative RF bi-directional amplifier system
    • 再生RF双向放大器系统
    • US5187803A
    • 1993-02-16
    • US467379
    • 1990-01-18
    • Harold K. SohnerMichael A. MorganSurinder Kumar
    • Harold K. SohnerMichael A. MorganSurinder Kumar
    • H04B3/38H04B5/00
    • H04B3/38H04B5/0018
    • A regenerative RF bi-directional communications system is provided for establishing RF coverage within a RF block tunnel area. The system uses a plurality of cascaded amplifier stages for periodically regenerating signals which are transmitted and received along a series of radiating cable length which link base station transceivers to hand-held or like mobile communication units. An intermediate frequency distribution system is used so that the required level of amplification is achieved through the several cascaded amplifier stages at the level of low-power IF signals generated from the original RF signals in conjunction with the appropriate oscillator and pilot signals. The IF distribution system restricts the cascading effect occurring due to the plurality of cascaded amplifier stages on the relatively low-power IF signals, thereby producing a negligible amount of intermodulation.
    • 提供再生RF双向通信系统(10),用于在RF块隧道区域(12)内建立RF覆盖。 该系统使用多个级联的放大器级(18)来周期性地再生沿着将基站收发器(14)链接到手持式或类似移动通信单元的一系列辐射电缆长度(16)发送和接收的信号。 使用中频分配系统,使得通过结合适当的振荡器和导频信号从原始RF信号产生的低功率IF信号的电平,通过几个级联放大器级(18)实现所需的放大电平。 IF分配系统限制了在相对低功率IF信号上由于多个级联放大器级而产生的级联效应,从而产生可忽略量的互调。