Re: NEC-LIST: Small antennas: can they me multiply resonant?

David, Steve, and Alan,

I think most of us working on small antennas define "small" in terms of
wavelength of operation, rather than being subresonant. Some of us have
found structures that don't include lumped elements that have one or more
resonances at wavelengths where the antenna is still small. So, I agree
with Steve's posting.

Doug Miron

----- Original Message -----
From: <alan.boswell_at_baesystems.com>
To: <d.jefferies_at_surrey.ac.uk>; <nec-list_at_gweep.ca>
Sent: Monday, January 06, 2003 11:49 AM
Subject: RE: NEC-LIST: Small antennas: can they me multiply resonant?

David
If you define a small antenna as an antenna operated below its lowest
natural resonant frequency, the question disappears (lumped components must
be disallowed).
Alan

-----Original Message-----
From: David Jefferies [mailto:d.jefferies_at_surrey.ac.uk]
Sent: 06 January 2003 17:02
To: nec-list_at_gweep.ca
Subject: NEC-LIST: Small antennas: can they me multiply resonant?

Dear List,

Revisiting the arguments about the CHU limit on Q for
small (very small) antenna structures, in the light of
my comments about multiple resonances, can a structure
which is very much smaller than the radian sphere
contain multiple radiating resonant elements, or is
it necessarily the case that small antennas are only
singly-resonant?

regards

--
David Jefferies
http://www.ee.surrey.ac.uk/Personal/D.Jefferies/
http://www.eryptick.net/
fax +44 (0)1483 534139 attn D.Jefferies
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