Talk:Leaky feeder

mass transit system

A "leaky" aerial is also used in underground communication. This is especially useful for emergency services when operating in enclosed tunnels such as a mass transit system. A typical example is in the Mass Transit system built in Hong Kong where the "leaky" aerial was installed when the tunnel was constructed under the capital program.as such leaky feeder be helpful for underground communication.

Health implications

I would like to see in the article some discussion of what levels of radiation e.g. train passengers will be exposed to through a system such as this. If anyone know of any research on this that would be appropriate for inclusion into this article that would be nice. __meco (talk) 21:08, 27 December 2010 (UTC)

There is ample general research on radio waves that shows beyond reasonable doubt there are no health implications (mobile phones, radio, powerlines etc.). 2001:470:1F0A:B09:0:0:0:2 (talk) 17:48, 20 February 2013 (UTC)

Interesting picture

Maybe someone can ask them if we can use their picture? http://www.becker-mining.com/runtime/cms.run/doc/English/737/Cable.html

--Elektordi (talk) 15:43, 17 May 2011 (UTC)

also: Shouldn't the arrows showing the Rf leakage be pointing to/from the smaller center wire to the right in the picture? They are pointing at the outer shield layer where the Rf is still contained in the cable. Pretty sure, but not certain. — Preceding unsigned comment added by ~2025-36435-51 (talk) 20:33, 18 February 2026 (UTC)

Origins

Origins of the leaky feeder system would be interesting, if anyone can find more. It seems to be a kind of Leaky wave antenna. I found these: 203.185.226.238 (talk) 04:43, 10 March 2014 (UTC)

"leaky feeder cable especially designed for mines by an English university some 25 years ago"

"The first known leaky-wave antenna was the slitted rectangular waveguide, introduced by W W Hansen in 1940 ... [another] structure was called a "holey waveguide""

"Serious interest in the use of leaky feeder systems in mines did not occur until the late 1960's and that primarily in Europe. Much pioneering work was sponsored by the Institute National des Industries Extractive (INIEX) in Belgium and by the National Coal Board (NCB) in the United Kingdom. A number of studies have been sponsored by the U.S. Bureau of Mines and an experimental installation was made in Bethlehem Steel Corporation's Grace Mine, near Morgantown Pennsylvania. "

Intense RF field exposure

What radiated power levels are typical and maximum for installed radiated coax systems?

It is reasonable to assume that there would be medical/health impacts from exposure to RF at some intensities and durations. What is known about what intensities and durations would cause what health impacts? -71.174.178.251 (talk) 11:33, 12 June 2014 (UTC)