Jasen Betts wrote:
On 2007-07-27, Rich Grise wrote:

On Thu, 26 Jul 2007 09:13:02 +0100, Jeff wrote:

" Well.. not all the 802.11b/g channels are in the amateur band, and even

there, there is a power limit (transmitter output power, though, not
EIRP), so you could conceivably fire up your 1500 Watt transmitter into
a 20dBi antenna and blast away.


That is what the moonbounce operators do, but with more antenna gain!!


There is the other rule about minimum power needed for communication,
though.

Again moonbounce is not uncommon in the 13cms band.

Yikes! I was just doing a little calculating, and you could put a 20 dB
Yagi in your shirt pocket! =:-O


how many elements ?

I saw a stacked yagi 2.4GHz antenna when I was in the pay-tv business
iirc 2 rows of 25 elements. dunno what gain it had.

Bye.
Jasen


for miniaturizing wi fi wi max or any band in the 100 MC to 10GC range,
You can use FWT antennas. FWT(Focused Wave antennas) miniaturize and
ruggedize antennas by embedding them into an engineered dielectric, when
hardened becomes and integral part of the antenna. For the real high
gain antennas, the mechanical support for the extra eleemtns is provided
by the intirinisic design of FWT antennas. Built in Balun and have
begun to integrate electronic onto he body of the fwt antenna. this
eliminates the rf connector, looses and performance degradation that
occurs right at the antenna to first stage interconnection!

Best regards,

Marc Popek

www.fwt.niat.net
http://www.youtube.com/profile?user=LVMarc