TRANSMITTING DEVICE FOR RADIO COMMUNICATIONS Russian patent published in 1998 - IPC

FIELD: radio engineering. SUBSTANCE: device has modulating signal generator, exciter, power amplifier, power adder, phase detector, differentiating circuit, controlled high-frequency signal selector switch, controlled phase shifter, and circulator. In proposed device, part of radio signal power reflected from antenna-feeder line is not lost in ballast load; it is branched off by means of circulator, controlled high-frequency signal selector switch, and members controlling this switch, as well as by means of phasing system and passed to second input of power adder wherein it is added to main radio signal arriving from output of power amplifier at first input of power adder and then it is picked off first output of power adder and conveyed to antenna-feeder line again. EFFECT: improved efficiency in transmitting digital radio signals. 6 dwg