Cover of: Leaky feeders and subsurface radio communication | P. Delogne

Leaky feeders and subsurface radio communication

  • 283 Pages
  • 4.62 MB
  • 3872 Downloads
  • English
by
P. Peregrinus on behalf of the Institution of Electrical Engineers , Stevenage, Herts, New York
Radio in mining., Tunnels -- Communication systems., Radio -- Transmitters and transmis
StatementP. Delogne.
SeriesIEE Electromagnetic waves series ;, 14
Classifications
LC ClassificationsTN344 .D38 1982
The Physical Object
Pagination283 p. :
ID Numbers
Open LibraryOL3080373M
ISBN 10090604877X
LC Control Number82180584

Leaky Feeders and Subsurface Radio Communications (IEEE Electromagnetic Waves Series) [Delogne, Paul] on *FREE* shipping on qualifying offers. Leaky Feeders and Subsurface Radio Communications (IEEE Electromagnetic Waves Series).

Leaky feeders and subsurface radio communication. Stevenage, Herts ; New York: P. Peregrinus on behalf of the Institution of Electrical Engineers, © (OCoLC) Document Type: Book: All Authors / Contributors: P Delogne.

means it’s official. Federal government websites often end Before sharing sensitive information, make sure you’re on a federal government : David A. Hill. Download PDF: Sorry, we are unable to provide the full text but you may find it at the following location(s): (external link)Author: Paul Delogne.

Leaky feeders may also be used on the surface, to confine radio coverage and thus improve spectrum efficiency. The term “leaky feeder” can also be taken to include a non-leaky cable with periodic discrete radiators, mode converters or spaced aerials. Classification of leaky feeders The following types of leaky feeder are commonly used.

Leaky Feeder Cable Leaky feeder is an antenna technology originally designed to deliver radio services in tunnels. If your car radio continues to work as you pass through a long tunnel is likely that a leaky feeder installation is involved.

As its name implies leaky feeder is a cable which leaks a small amount of the radio signal throughout, just. Road tunnels are commonly served by leaky feeders to provide VHF radio coverage.

in this book include design and development of an intrinsically safe trapped miner communication system, shaft. A Leaky feeder installation is a permanent solution, with ensures 24/7 communication when required and is ideal in emergency situations, where easy access to communication is needed.

To take an example, a hotel may need to provide RF coverage to all service areas, and to do this, multiple antenna’s would be required throughout the building.

Leaky feeder communication systems (or radiating cables) are an effective method of wireless communication between mine workers.

Pyott Boone, experts in data and communications infrastructure, offers customizable systems that provide clear two-way radio communication and high-speed data transfer capabilities.

Leaky feeders and subsurface radio communications. P Delogne; P. Delogne, "Leaky feeders and subsurface radio communications", Institute of Electrical Engineers. GSM retransmission into.

Mine communications, leaky feeder communications, tunnel communications, leaky feeder cable, leaky feeder systems, induction cable, radio communications in mines I Originator's Key Words Unclassified I Unclassified I 1 1 Availability Statement I U. Securlty Classlf. of the Report U.

Security Classif. of This Page No. Click to read more about Leaky Feeders and Subsurface Radio Communications (Ieee Electromagnetic Waves Series) por Paul Delogne.

LibraryThing is a. Principle. A leaky feeder communication system consists of a cable run along tunnels which emits and receives radio waves, functioning as an extended cable is "leaky" in that it has gaps or slots in its outer conductor to allow the radio signal to leak into or out of the cable along its entire length.

Details Leaky feeders and subsurface radio communication FB2

Leaky Feeder systems offer clear two-way radio communication and high-speed data transfer capabilities throughout your underground complex.

PBE’s Leaky Feeder System can be tailored to specific site requirements to provide the best radio coverage and data communications.

A leaky feeder is an underground communications system used in underground mining and other tunnel environments. It consists of a coaxial cable run along tunnels which emits and receives radio waves, functioning as an extended antenna.

The cable is “leaky” in that it has gaps or slots in its outer conductor to allow the radio [ ]. leaky feeder: A leaky feeder is a coaxial cable that has small sections of its copper shielding stripped away to allow radio frequency (RF) signals to escape.

Leaky feeders, which act as extended antennas, are also called radiating cables. There are several ways to classify electromagnetic waveguides. Depending on their boundaries, they can be classified into waveguides with perfectly reflecting walls or finite impedance walls, as well as open waveguides.

In terms of their applications, there are the low attenuation and low delay distortion waveguides for telecommunication, the low crosspolar field waveguides used as feeds for 2/5(1).

Leaky feeder communications in mines offer more stable and effective communication than wired phones. Carroll Technologies combines a number of technologies in its leaker feeder system, a wireless communication network that can be integrated with tracking and monitoring devices to provide a holistic solution to keep mines connected.

[1]. Delogne, P, Leaky Feeders and Subsurface Radio Communication. Peter Peregrinus, Stevegage, UK. Google Scholar [2]. Emslie, A.G, Lagace, R.L and Strong, P.F. Theoretical and experimental investigations of the radiation properties of a buried leaky coaxial cable (LCC), as a guarding radar system, are presented for various artificial and natural local inhomogeneous conditions along the cable system.

The theoretical model of two coupling coaxial lines, outside of which consists of a sub-soil medium, is introduced to describe interactions of two modes.

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Leaky Feeder cable is designed to ‘leak’ or radiate the radio signal out, as well as allow signals in from remote radio trans-ceivers within 50 - meters from the Leaky Feeder cable. To sustain the sig-nal levels over long distances, Line Am-plifiers (or boosters) are inserted along the Leaky feeder cable run, nominally every m.

Leaky feeders are usually mounted permanently to enable hour communications. A leaky feeder is used to boost a radio signal in locations where the radio waves would typically have difficulty travelling by themselves, e.g. along tunnels, shafts and underground. A Leaky feeder installation is a permanent solution, with ensures 24/7.

A leaky feeder is a communications system used in underground mining and other tunnel environments. [1] The layman's term "leaky feeder" implies that the cable is in some way deficient. Manufacturers and cabling professionals use the term "radiating cable" [2] [3] [4] as this implies that the cable is designed to radiate: something that coaxial cable is not generally supposed to do.

About product and suppliers: 1, leaky feeder cable products are offered for sale by suppliers onof which communication cables accounts for 11%, telecom parts accounts for 9%, and other wires, cables & cable assemblies accounts for 1%.

Rampalli and H.R. Nudd, “Recent Advances in the Designs of Radiating (Leaky) Coaxial Cables,” International Wire & Cable Symposium Proceedings, Radiating Cable Handbook, Radio Frequency Systems, Inc.

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Additional references. Delogne, Leaky Feeders and Subsurface Radio Communications, Peter Peregrinus Ltd.: @article{osti_, title = {A new underground radio communications system}, author = {Morgan, M D}, abstractNote = {Shows how a leaky-feeder coax cable communication system using hand-held mobile radios enables management to be in constant touch with all working areas of Inland Steel Coal Mine number 1 at Sesser, Ill.

Studies indicated that if the mobility of an underground communications. [1] Paul • Delong Nie. Leaky feeders and subsurface radio communication.

Beijing: Posts & Telecom Press, (). Blaunstein, N., Dank, Z., and Zilbershtein, M.,Wave pattern of a buried leaky coaxial cable in a guiding radar system: Proc. of IEEE AP-S International Symposium and URSI Radio Science Meeting, JuneAtlanta, GA, p. Google Scholar. “Mines are usually remote to major cities and established infrastructure, which makes access to communication specialists and services difficult for the sector.

The Smartcom VHF leaky feeder system, which has been installed in mines throughout the world, is known for dependable performance, requiring little maintenance.”. IEEE Transactions on Antennas and Propagation, (23): [7] Delogne P.

Leaky Feeders and Subsurface Radio Com- munications. London: Peregrinus, [8] Sun J P, Cheng L F. Analysis of electromagnetic wave propagation modes in rectangular tunnel.

Chinese Jour- nal of Radio Science,20(4):. a central headend BDA drives the passive DAS elements or leaky feeder cable (Figure 3). With passive components, the RF signal degrades with every device in the transmission chain.

The antennas might have varying output power depending on the distance from the. A study of radio communication in the underground metero tunnel of the city of Cairo, Egypt was carried out. A part of this tunnel was selected, which has a rectangular shape.

Its dimensions are m wide, m height and km long. The walls are made of concrete which have conductivity between 10 −1 and 10 −2 mho / m.The reception of long-range signals, at various radio frequencies, by a leaky feeder laid around a building is compared with that from an aerial carried over the same route.

This highlights an advantage in using leaky feeders to reduce long-range interference to cordless communication in buildings.