Telecommunications – Transmitter and receiver at separate stations – Single message via plural carrier wave transmission
Patent
1982-08-23
1984-10-09
Ng, Jin F.
Telecommunications
Transmitter and receiver at separate stations
Single message via plural carrier wave transmission
455 14, 455 41, H04B 100, H04B 700
Patent
active
044765746
ABSTRACT:
A radio communication system for use in tunnels, mines, buildings or other shielded locations in which a pair of radiating transmission lines (30), (31) extend through such location in spaced coextensive relation to each other. Each transmission line (30), (31) has at least one unidirectional amplifier (32), (33) interposed therein with the sense of the unidirectional amplifier (32) of one transmission line (30) being opposite to the sense of the unidirectional amplifier (33) of the other transmission line (31). Each of the amplifiers (32), (33) has a gain which is less than the coupling loss between the transmission lines (30), (31). Two or more mobile transceivers (35) in the location served by the system are coupled to the transmission lines (30), (31) by electromagnetic wave propagation in space in order to communicate directly with each other at a given radio frequency within the frequency range of the system.
REFERENCES:
patent: 2779924 (1957-01-01), Chatellier
patent: 3829767 (1974-08-01), Delogne
patent: 3916311 (1975-10-01), Martin
patent: 4152648 (1979-05-01), Delogne
patent: 4280225 (1981-07-01), Willis
"The Use of In-Line Repeaters in Leeky Feeder Radio Systems for Coal Mines", by David J. R. Martin, 1978.
"Systems Aspects of Leakage-Field Radio Communication" by D. J. R. Martin, Nov. 1975.
"The Bicoaxial Leaky Line and its Application to Underground Radio Communications", by D. J. R. Martin, 1976.
"A General Study of the Leaky-Feeder Principle" by D. J. R. Martin, 1975.
"Radio Communication in Mines" by D. J. R. Martin, 1978.
"Leaky Feeder Radio Techniques for Mines and Tunnels" by D. J. R. Martin et al., 1979.
"Guided Radiation-The Key to Tunnel Talking" by R. A. Farmer et al., 1965.
"Developments in Leaky Feeder Radio Communication" by Q. V. Davis et al., 1977.
"Radio Communication in Subways and Mines Through Repeaters, Amplifiers & Leaky Transmission Lines" by Isberg, 1978.
"Radio Links for Highway Tunnels" by A. Bosshard, May 1979.
"Guided Radio Communication in Tunnels, Mines, Canyons and Buildings" by Isberg, 5/1979.
"Data Communication from a Vehicle Using a Leaky Feeder" by Davis et al., 1977.
"The Planned National Highway System for Switzerland" by Grossi, 7/1978.
"Subsurface Radio Communications" by Delogne, 1980.
"Some Aspects of Leeky Feeder Radio Communication Being Studied by the UK National Coal Board" by Martin, Mar. 1978.
Clouse, Jr. Clifton E.
Esposito Michael F.
Gaither Roger S.
Ng Jin F.
The United States of America as represented by the United States
LandOfFree
Radio frequency communication system utilizing radiating transmi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Radio frequency communication system utilizing radiating transmi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio frequency communication system utilizing radiating transmi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1605187