Telecommunications – Carrier wave repeater or relay system – Two separate way transmission
Patent
1991-03-06
1993-07-20
Eisenzopf, Reinhard J.
Telecommunications
Carrier wave repeater or relay system
Two separate way transmission
455 491, 455 40, 455 551, 455344, H04B 700
Patent
active
052300803
ABSTRACT:
A communication installation for use in a site having underground galleries, for information exchanges, comprises a repeater connected to a wired distribution network. The repeater is arranged for receiving messages which arrive over the wired network at a first frequency and for retransmitting the messages over the network at a second frequency different from the first frequency. The network comprises non-radiating cable sections, radiating cable sections capable to radiate at the second frequency and to collect radiation energy at the first frequency from a portable emitter-receiver set placed nearby. The network further comprises terminal antennae for emitting at the second frequency and collecting energy at the first frequency.
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Charles Michel
Fabre Jean
Compagnie Generale des Matieres Nucleaires
Eisenzopf Reinhard J.
Keough Timothy H.
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