A web search for 'magnetic field of a circular loop' gives many hits,
some very mathematical. A reasonably simple one is at:
http://hyperphysics.phy-astr.gsu.edu/hbase/magnetic/curloo.html
and includes an on-line calculator.
The off-axis field strength of a circular loop is difficult, because it
involves elliptic functions. Curiously, a square or even rectangular
loop is mathematically simpler.
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2018-10-12 05:15, Amund Westin wrote:
I’m looking for some good and practical loop antenna theory.
Have a RF signal of +40dBm @ 100MHz and a self-made 1 turn semi-rigid
coax loop with inner lead soldered to the shield. Theory (or rule of
thumb) about the generated fields from such antenna are welcome.
Will use this loop antenna under RF immunity troubleshooting.
Thanks.
BR
Amund
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