Radio frequency transmission system

摘要

Radio transmission system in which the carrier frequency oscillator at the transmitter is wobbulated by varying its frequency in a periodic manner and modulated and transmitted to a receiving site where the detected signal is passed through two separate paths, one being supplied to a converter and the other is supplied to the converter through a delay line. The output of the converter comprises an intermediate frequency which contains the modulation which is then demodulated and detected. Modification of the invention provides for transmitting two or more separate intelligences on the carrier and detecting the two intelligences at the receiver.