METHOD OF NARROWING OF BAND OF OCCUPIED FREQUENCIES WHEN TRANSMITTING HIGH-FREQUENCY SIGNALS AND OF INCREASED EFFICIENCY OF TRANSMISSION AND RECEPTION OF HIGH-FREQUENCY SIGNALS AND DEVICE FOR ITS REALIZATION

摘要

FIELD: radio engineering. SUBSTANCE: method relates to high-frequency telephony, to optical and acoustic (for instance, underwater communication) communication, to location, control and so on. In compliance with the method transmitter forms modulated high-frequency signal not including side frequency bands in its spectrum, signal is frequency-filtered in receiver in path of high and/or intermediate frequency with passing of band of frequencies lesser than upper modulation frequency of high-frequency signal. Device for realization of method has former of modulated high-frequency signal not including side frequency bands in its spectrum incorporated in transmitter. Path of high or intermediate frequency of receiver has frequency filter/filters width pass band lesser than upper modulation frequency of high-frequency signal. Invention can be used in design of low-noise amplifiers. EFFECT: narrowing of band of occupied frequencies when transmitting high-frequency signals, increased efficiency of transmission and reception, reduced lever of side radiations of transmitter, enhanced selectivity and sensitivity of receiver.