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January 16th 04, 04:41 AM

On 14 Jan 2004 11:54:38 -0800, (Rocco)
wrote:

I'm basing my answer on the subject line word "hard" and the "shielded
environment" statement below.

Hi,
I have to provide mobile phone signal in a shielded environment.
Maybe the only way is by using an antenna that capture a sufficiently
strong signal outside the shielded room, and conveying that signal (

If it is truly a shielded room...forget it.
It was shielded for a reason and you used the term "hard" suggesting
it was intended to be shielded. Causing that shielding to fail could
be grounds for hunting for a new job.

using a coax-cable ) inside it, at the end of the cable some sort of
repeater that provide the diffusion.

IF you could get a passive repeater to work you would be causing a
loss of integrity to the shielded room. I've never gotten a passive
repeater to relay a signal strong enough to be useful.

Does anyone has some other suggestion?
Or if the idea is correct, are those repeater in commerce?
And about the receiving antenna?
Thanks in advance.

Unless, contrary to your phrasing the room is not shielded by intent
you really need to forget the whole thing.

I used to have a work area in a double walled shielded cage. When the
door was closed we could take 5 watt HTs less than a foot apart... One
outside and one inside. We could see and hear each other through the
screen but the HTs could not. Anything that could have let a signal
in would have negated the purpose of the room.

Roger Halstead (K8RI & ARRL life member)
(N833R, S# CD-2 Worlds oldest Debonair)
www.rogerhalstead.com

RoS