[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:
> http://www.wilsonelectronics.com/ProductDetails.aspx?Product=19&title=Small+Office+%2f+Home+Office+%E2%80%93+SOHO+%28801245%29&Category=9
> 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.
>>> Verizon.
>>>> A very short run or very low loss coax (low loss at up to 2Ghz).
>>> OK.
>>>> Ideal external antenna placement.
>>> Not a problem putting a beam outside and pointing it SE at the
>>> tower.
>> 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!
>>> doc


Thanks! & 73, KD4E
David Colburn http://kd4e.com
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