Body
It might be the antenna moon bounce antennas are helix and directional were
radio station antennas are not just area coverage .not like a helix .
On Jun 6, 2018 6:07 PM, "[email protected] [EVGRAY]" <
[email protected]> wrote:
>
>
> Hi Mick,
>
> The RF beam must be as narrow as possible to not spread out the energy to
> places where it does no good. The guy I told about used a helical antenna.
> I don't know anything about how he did it and the power used. One way could
> be by using the predecessor of the LASER which was the MASER. This would
> transmit a thin beam of microwaves.
>
> This Wikipedia article (https://wiki2.org/en/Earth%
> E2%80%93Moon%E2%80%93Earth_communication) has a gallery of antennas used
> for earth moon earth communication. It tells that as low as 100W can be
> used when using digital signal processing.
>
> Regards
> Ole
>
>
> ---In [email protected], <mkjekyll@...> wrote :
>
> Ole,
>
> Specifically the math is messing with my head. Either I am
> misunderstanding / applying the math else according to FPL calculations
> antenna gain and dbW something the distance of the moon should not be
> feasible without millions of watts of transmitter power.
>
> Laserbounce is another story due to the reflectors and the fact a laser
> stays colimated enough not to disperse as quickly as does Rf.
>
> On 6/6/2018 3:04 PM, onielsen@... [EVGRAY] wrote:
>
>
>
> Hi Mick,
>
> The problem by using the moon as a reflector could be made more efficient
> if placing a RF reflector just like the LASER reflectors already out there.
> Another way could be making a RF repeater like is done in communication
> satellites. It would probably be much cheaper to put up a communication
> satellite or to use one of the many already up there.
>
> The surface of the moon isn't a good conductor (I guess) and it may even
> spread out the signal instead of reflecting it back to the transmitter like
> it is done with corner reflectors <https://wiki2.org/en/Corner_reflector>.
> This gives great loss of the received signal.
>
> Regards
> Ole
>
>
> ---In [email protected], <mkjekyll@...> <mkjekyll@...> wrote :
>
> https://www.electronics-notes.com/articles/ham_radio/amateur-propagation/
> moonbounce-propagation-eme.php
>
> Here is a link for ham radio folk about EME or moonbounce radio. The path
> loss in best case scenarios is very high.
>
>
> Can someone who knows more RF electronics theory such as Ole or Hector
> please comment as to how this is overcome with 1000 watt input transmitter
> when the maximum theoretical S/N ratio and 252 db PL should require
> transmitters larger than AM radio stations.
>
>
> I must be missing something. Also checking the amateur radio sites for an
> answer.
>
>
>
> Thanks,
>
> Mick
>
>
>
>
>
>