Radio frequency communication system utilizing radiating transmission lines
A radio communication system for use in tunnels, mines, buildings or other shielded locations in which a pair of radiating transmission lines extend through such location in spaced coextensive relation to each other. Each transmission line has at least one unidirectional amplifier interposed therein with the sense of the unidirectional amplifier of one transmission line being opposite to the sense of the unidirectional amplifier of the other transmission line. Each of the amplifiers has a gain which is less than the coupling loss between the transmission lines. Two or more mobile transceivers in the location served by the system are coupled to the transmission lines 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.
- Assignee:
- Dept. of Energy
- Patent Number(s):
- US 4476574
- OSTI ID:
- 5699356
- Resource Relation:
- Patent File Date: Filed date 23 Aug 1982; Other Information: PAT-APPL-410785
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
COAL MINES
COMMUNICATIONS
RADIO EQUIPMENT
DESIGN
ELECTROMAGNETIC RADIATION
FREQUENCY RANGE
MAGNETIC AMPLIFIERS
POWER TRANSMISSION LINES
RADIO EQUIPMENT POWER SUPPLIES
WAVE PROPAGATION
AMPLIFIERS
ELECTRONIC EQUIPMENT
EQUIPMENT
MINES
POWER SUPPLIES
RADIATIONS
UNDERGROUND FACILITIES
420800* - Engineering- Electronic Circuits & Devices- (-1989)
012000 - Coal
Lignite
& Peat- Mining