[RFI] Passive Cellphone Repeater?
doc at kd4e.com
doc at kd4e.com
Sun Apr 17 15:44:08 PDT 2011
$389. and it does not sound like a lot more coverage inside
the house than a passive repeater.
> Mike Fatchett W0MU wrote:
> Why passive? Link above is for an active repeater.
> On 4/17/2011 12:28 PM, Christopher Brown wrote:
>> On 4/17/11 10:06 AM, doc at kd4e.com wrote:
>>>> Go spend about about $100 on a small UPS.
>>> $39.95 on sale at OfficeMax today. :-)
>>>> Passive is possible, but you would need.
>>>> Exterior and interior antennas matched to the bands used by the cell
>>>> carrier. Note, _bands_, not band. Most carriers will be running one
>>>> high, one low (example, 800/1900), but the specifics vary with
>>>> technology type (GSM v.s. CDMA) and specific carrier.
>>>> A very short run or very low loss coax (low loss at up to 2Ghz).
>>>> Ideal external antenna placement.
>>> Not a problem putting a beam outside and pointing it SE at the
>> Generally you would need to not only be able to eyeball the tower, but
>> have a clear fresnel zone.
>> If not you might need to fall back to using the external antenna port on
>> the phone.
>>>> A _very_ strong signal.
>>> More elements, at these frequencies there's not much weight or
>>> wind-resistance ...
>>> I can homebrew a beam and I have a variety of coax from flexible
>>> hardline w/N-type connectors, low-loss coax w/SMA's, and the usual
>>> Ham coax. The length will be fairly short.
>>>> 2) Farther away with perfect line of sight to the tower with a well
>>>> aimed high-gain directional on roof.
>>> # 2 would be the situation.
>>> Sounds like a fun challenge ... as time permits.
Thanks! & 73, KD4E
David Colburn http://kd4e.com
SE-GA Tailgate - April 9th, 2011
Have an http://ultrafidian.com day
I don't google I SEARCH! http://ixquick.com
Shop Freedom-Friendly http://kd4e.com/of.html
More information about the RFI