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

Images showing the EM field is welcome too (not radiation pattern but
measured in situ and transposed in false colors)

Hi Thierry,

Go to:
http://home.comcast.net/~kb7qhc/ante...elds/index.htm
and select any particular antenna style, observe the "false" color
mapping of near fields, and tell me if this is what you mean.

73's
Richard Clark, KB7QHC

"Richard Clark" wrote in message
...
On Sun, 17 Oct 2004 14:27:31 +0200, "Thierry" - wrote:

Images showing the EM field is welcome too (not radiation pattern but
measured in situ and transposed in false colors)

Hi Thierry,

Go to:
http://home.comcast.net/~kb7qhc/ante...elds/index.htm
and select any particular antenna style, observe the "false" color
mapping of near fields, and tell me if this is what you mean.


Hi Richard,

Fine... That gives already a good idea. Congratulaiton for the job !
If I can't find thermal versions I 'ld like to use those images. I will
contact you directly.
I bookmarked your link.

73
Thierry, ON4SKY
http://www.astrosurf.com/lombry



73's
Richard Clark, KB7QHC

On Sun, 17 Oct 2004 20:36:27 +0200, "Thierry" - wrote:
Fine... That gives already a good idea. Congratulaiton for the job !
If I can't find thermal versions I 'ld like to use those images. I will
contact you directly.
I bookmarked your link.

Hi Thierry,

I got your email. Simply copy the pages to display where you want if
you wish. I am not particular about the vanity of copyright nor
"patent pending." You will note that I also provide both the antenna
designs and mathcad files for free too.

73's
Richard Clark, KB7QHC

"Richard Clark" wrote in message
...
On Sun, 17 Oct 2004 20:36:27 +0200, "Thierry" - wrote:
Fine... That gives already a good idea. Congratulaiton for the job !
If I can't find thermal versions I 'ld like to use those images. I will
contact you directly.
I bookmarked your link.

Hi Thierry,

I got your email. Simply copy the pages to display where you want if
you wish. I am not particular about the vanity of copyright nor
"patent pending." You will note that I also provide both the antenna
designs and mathcad files for free too.


Thanks for sharing ;-)
73
Thierry, ON4SKY

73's
Richard Clark, KB7QHC

On Mon, 18 Oct 2004 17:26:24 +0200, "Thierry" - wrote:
"Richard Clark" wrote in message
.. .
Hi Thierry,

I got your email. Simply copy the pages to display where you want if
you wish. I am not particular about the vanity of copyright nor
"patent pending." You will note that I also provide both the antenna
designs and mathcad files for free too.


Thanks for sharing ;-)

Hi Thierry,

You are welcome. Sharing is the means to establish "prior art" to
break the back of commercial tech-fraud. It has nipped a lot of
hyperventilated claims for fractal antenna "inventions" over the
years. ;-)

73's
Richard Clark, KB7QHC

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/

Subject: Thermal and EM images of antenna ?
From: Wes Stewart
Date: 10/17/2004 12:05 PM Eastern Daylight Time
Message-id:

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/


Hmmm.. where are the thermal images of "antennas during transmission"? All I
see are simulation graphics, not antennas with power running through them.

73,
Chip N1IR

"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 :-((
There also http://www.x20.org/
plus this one http://www.thermal-imaging-survey.co.uk/ maybe.

Thierry, ON4SKY
http://www.astrosurf.com/lombry

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.