(Art Unwin KB9MZ) wrote in message om...
(k4wge) wrote in message snip

the first reported fractal small
antenna that improves the features of some classical antennas in terms
of bandwidth, resonance frequency and radiation resistance. Whether
such antennas are bounded to the fundamental limits on small antennas
is still a topic under investigation.

Sir, I found this interesting reading especially the fact that Fractals
are now made commercialy
.However the last sentence above above peeked my interest,
What exactly is meant in its entirety the following statement
" the fundermental limits on small antennas"?

TIA
Art

These references are relevant to topic:

H.A.Wheeler, "Fundamental Limitations of Small Antennas," Proc. IRE,
pp. 1479-1488. December, 1947.

L.J.Chu, "Physical Limitations on omni-directional antennas",
J.Appl.Phys., vol. 19, pp.1163-1175, December 1948

R.C.Hansen, "Fundamental Limitations in Antennas", Proc. IEEE, vol.69,
no.2, February 1981.

J.S. McLean, "A Re-Examination of the Fundamental Limits on the
Radiation Q of Electrically Small Antennas", IEEE Trans. on Antennas
and Propagation, Vol.44, no.5, May 1996.

Cohen, (Unsigned) "Fractal Antenna White Paper", Fractal Antenna
Systems, Inc., 1999.

W.A. Davis, W.L. Stutzman, and E.D. Caswell, "Fundamental Limits on
Small Antennas," URSI Radio Science Meeting (Salt Lake City, UT), July
2000. (Paper 00-10)

(Art Unwin KB9MZ) wrote in message om What exactly is meant in its entirety the following statement
" the fundermental limits on small antennas"?

TIA
Art

A couple more links on limits:

October 2003: Presentation on fundamental limits and tradeoffs between
the physical size of an antenna and its gain, efficiency and bandwidth

http://www.antennasonline.com/ast_conf_program.htm


Are fractal dipolar radiators subject to the same fundamental limits of
Euclidean ones?

http://hawk.iszf.irk.ru/URSI2002/GAa...pers/p0908.pdf


Other links:

Article about fractal and other miniature antennas --

http://www.az-ww.com/2003pdfs/Tsaipresentation2003.pdf


An amusing caution regarding patents --

http://www.cst.de/company/news/press...over_10_02.pdf


Here is another view of patents for fractals --

http://www.elektroda.pl/eboard/ftopic12305.html

(k4wge) wrote in message news:7b671b4e.0312120640.6a17a344@posti

Thank you for that. Hopefully I can get to them via the internet
as I am relly looking forward to reading about small antenna limits
and what they are based upon
Best regards
Art



ng.google.com...
(Art Unwin KB9MZ) wrote in message om What exactly is meant in its entirety the following statement
" the fundermental limits on small antennas"?

TIA
Art

A couple more links on limits:

October 2003: Presentation on fundamental limits and tradeoffs between
the physical size of an antenna and its gain, efficiency and bandwidth

http://www.antennasonline.com/ast_conf_program.htm


Are fractal dipolar radiators subject to the same fundamental limits of
Euclidean ones?

http://hawk.iszf.irk.ru/URSI2002/GAa...pers/p0908.pdf


Other links:

Article about fractal and other miniature antennas --

http://www.az-ww.com/2003pdfs/Tsaipresentation2003.pdf


An amusing caution regarding patents --

http://www.cst.de/company/news/press...over_10_02.pdf


Here is another view of patents for fractals --

http://www.elektroda.pl/eboard/ftopic12305.html

Dear Mr. Peter O. Brackett,

But of course, we

....
|
| don't forget to thank the, often vilified,
| US Taxpayers for their unwavering support of
| the development of all of the free computer program implementations of
| circuit-theoretic,
| field-theoretic and QED models with the computer programs called SPICE, NEC
| and other QED kinda stuff...
|
....

although, I am afraid, we have also to add,
somewhere in the beginning of an everlasting list,
at least those who supported Pythagoras of Samos:

http://lpf.ai.mit.edu/Patents/knuth-to-pto.txt

And so on...

d;^)

But,
apart from the fact of this slightest omission,
I have already forwarded your remarkable message.

Sincerely yours,

pez
SV7BAX
TheDAG

P.S.
Excuse me,
I do not believe it is really needed,
but just in case:

http://www-gap.dcs.st-and.ac.uk/~his...ythagoras.html

Pez:

Heh, heh... thanks for your thoughtful additions to my comment.

It seems that the all suffering US Taxpayers stand on the backs of giants!

Best Regards for the New Year.

--
Peter K1PO
Indialantic By-the-Sea, FL.


"pez" wrote in message
...
Dear Mr. Peter O. Brackett,

But of course, we

...
|
| don't forget to thank the, often vilified,
| US Taxpayers for their unwavering support of
| the development of all of the free computer program implementations of
| circuit-theoretic,
| field-theoretic and QED models with the computer programs called SPICE,
NEC
| and other QED kinda stuff...
|
...

although, I am afraid, we have also to add,
somewhere in the beginning of an everlasting list,
at least those who supported Pythagoras of Samos:

http://lpf.ai.mit.edu/Patents/knuth-to-pto.txt

And so on...

d;^)

But,
apart from the fact of this slightest omission,
I have already forwarded your remarkable message.

Sincerely yours,

pez
SV7BAX
TheDAG

P.S.
Excuse me,
I do not believe it is really needed,
but just in case:

http://www-gap.dcs.st-and.ac.uk/~his...ythagoras.html