[Scan-DC] Any Use for Satellite Dishes?

Sat, 23 Aug 2003 15:41:11 -0400

    Given the proper 2 ghz. waveguide feed illuminating a reflector
efficiently, it is possible to use an efficient prime focus feed reflector
(antenna) to achieve additional gain in a point to point link.  A solid
reflector speced at Ku band will be the most efficient.  Segmented mesh
antennas have poorer spec curvature at C and Ku band which results in a
less efficient reflector (antenna).  Offset feed reflectors (antennas) such
as DTV and Dish network will not work because an efficient 2 ghz. offset
feed would have to be used.  Offset feeds typically used are with lnbs for
the 12,200-12,700 mhz. downlink frequency range (DTV/Dish).   Other
acceptable antennas are MDS and MMDS.  Typically they are 24 inch diameter
parabolics or corner reflectors.

   Be careful not to accept as gospel some of the do it yourself projects
seen on some websites.  Some  individuals do not understand microwave
transmission theory when configuring reflector (antenna) systems.  It may
not be the best way to go given the same effort and expense.

Andrew Leyden wrote:

> Actually, there is some use for old dishes as 802.11 extenders.  If you
> have a wireless Internet signal that you want to send to another
> building, like a garage or a neighbor, there are some websites that
> show you how to modify the dish into a nice 802.11 directional.
>
> On Saturday, August 23, 2003, at 12:12 AM, [email protected] wrote:
>
> > [email protected]
>
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