Duplex radio communication system with bilateral synchronisation - has master and out stations and intermediate stations with phase controlling servos

摘要

The duplex radio communication system is used with fixed or mobile stations connected in series. It uses millimetre wavelengths and has bilateral synchronisation. The system comprises a first terminal or master station which transmits on one carrier frequency. It also has a second terminal or out station which receives on a different carrier frequency. Bilateral stations are also used. Each terminal station has a trans receiver and each intermediate station has a trans receiver linked with the master station and another trans receiver linked with the out stations. Each trans receiver has a hyper frequency oscillator used as transmitter and local oscillator, a mixer and as a selective amplifier. The master station also has a master oscillator and a phase controlling servo. The intermediate stations also have a secondary oscillator, a phase controlling servo for master station signal and another phase controlling servo for out station signals.