On Mon, 18 Jul 2011 14:12:43 -0500, John S
wrote:
Sorry Jeff, I need to try again,
Either I'm doing a very poor job of explaining my lack of understanding
or maybe we are looking at two different pages.
If you look here;
http://home.comcast.net/~ross_anders...MHzAntenna.htm
you will see the FENCE is used as the ANTENNA ELEMENTS and aluminum foil
used as the reflector.
But the fence loops seem to me to be the same size for both 1296Mhz
and 2.4Ghz antenna.
Mikek
I concur with your observation, Mikek. It may be that Jeff has looked
only at the first listed reflector which was identical to the antenna
itself.
Both the 1296 and 2.4gHz antennas use the same fencing material.
John - KD5YI
Nope, my mistake. Brain damage and assumption on my part.
http://home.comcast.net/~ross_anderson/CurtainQuadFigure11.htm
http://home.comcast.net/~ross_anderson/2400MHzAntenna.htm
I didn't use the recommended fencing material. Instead, I made mine
from some #16 awg solid copper wire, soldering the junctions together.
When I built the 2.4GHz version, I scaled it from the 1.2GHz
dimension, resulting in NOT using the 2x3" fencing material. I then
built it without looking at the original article again. I'll dig
deeper and see if I can find the 2.4GHz antenna and design data.
That brings me back to the original question, which is how can both
antennas be made from the same 2x3" fencing material. I'm not sure
what's happening because the drawings are not fully dimensioned. I
also just noticed that the grid paper shown do not match the
dimensions listed in the NEC deck. Logic (and guesswork) would
suggest that if the 2x3" mesh was used for 2.4GHz, then every other
wire could be used on 1.2GHz, forming a 2x6" mesh. However, I can't
tell from the dimensioning. I'll try to transplant the dimensions to
a common drawing, and see if it can be decoded.
Gone to do some chain sawing. More if I survive.
--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060
http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558