Thierry wrote:

"Wes Stewart" wrote in message
...

On Sun, 17 Oct 2004 14:27:31 +0200, "Thierry" - wrote:

|Hi,
|
|To illustrate technical articles about EM radiations, I' m searching for
|thermal images of antennas during transmission ?
|Images showing the EM field is welcome too (not radiation pattern but
|measured in situ and transposed in false colors)
|
|Any URL to suggest ?

Sure just buy a copy of this:

http://www.ansoft.com/products/hf/hfss/



Yes, I know. But I 'm short of money currently :-((


Oy, seems anything will turn into a fight, these days! 8^)

Here is what I suggest as a low tech and perhaps a bit silly solution.

Get a number of aquarium temperature sensors. these are the liquid
crystal type that is put on the outside of the tank, with the
temperature indicated by color change. Place on the antenna with the
number of stickers chosen by your desired resolution.

Experiments should be run on a calm day, and ideally at the same
temperature (although you can calculate for the differences) each time.

Transmit, and check, record, and enter into a program that can map the
results for you, or map it out manually.

Binoculars may be needed to see the tape!

This is not as glamorous as a thermal imaging camera, which would have
it's own set of problems, but it should work, and be quite inexpensive,
requiring only more time on your part.