RADIOFREQUENCY DUPLEXING SYSTEM AND BROADCASTING OR COMMUNICATION SYSTEMS USING SAID SYSTEM

摘要

The invention relates to interactive broadcasting systems and communication systems. The invention more particularly relates to radiofrequency duplexing of two channels used by said systems. A first variant is disclosed wherein said radiofrequency duplexing system comprises a first coupler (3) receiving a signal m from the uplink channel and a signal d from the downlink channel, providing the sums s and s9oa of said signals d and m from the uplink and downlink channels theoretically attenuated by 3 dB; an extraction device (3') for the uplink channel receiving the two sums s and sgoo, providing a signal dr corresponding to the signal d from the uplink channel with a theoretical attenuation of OdB. In a general manner, said radiofrequency duplexing system enables all couplings of antennas or signals of two different channels with at least a zero theoretical insertion loss for the downlink channel and a reduced duplex distance.