On Tuesday 24 December 2002 12:44, hamilton mal wrote:
----- Original Message -----
From: "Steve Thompson" <[email protected]>
To: <[email protected]>
Sent: Tuesday, December 24, 2002 7:30 AM
Subject: LF: Re: Loops again
> ----- Original Message -----
> From: hamilton mal <[email protected]>
> To: <[email protected]>
> Sent: 23 December 2002 16:55
> Subject: LF: Loops again
>
>
> With all the loop talk that has been going on since before time began has
> anyone found a design for a near perfect small loop, suppose its like how
> long is a piece of string, obviously the bigger the better but then there
is
> the diminishing returns senario, it there much noticeable difference
between
> a 2 meter side square loop and a 4meter.
> Which is better a single turn loop, several turns in series, several
> turns in parallel and the best method of feed and matching at the loop.
> <snip> ------------------
> This site gives a good treatise on loop antennas from first principles,
and
> provides the maths to let you consider what to expect with changes in
> size and numbers of turns.
>
> http://www.ece.mcmaster.ca/faculty/georgieva/temp/Antennas_L11.pdf
>
> Steve
Thanks Steve.
Its a wonderful article and has certainly refreshed my mathematical skills.
It starts off by saying that small loops are very INEFFICIENT and because
of the high losses really only suitable for Receiving purposes. Not very
promising.
I'm glad you found it useful - I found the maths just about manageable, and
the final equations very useable. If you go up a layer to .........../temp/
you will find a series of a dozen or more such 'lectures' which deal with
most antenna topics in the same way.
From what I remember, I reckoned that, for transmitting, you are better off
making a larger loop than going for more turns, for any given amount of wire.
Steve
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