Hi Rik,
At 10:24 03/04/2002, you wrote:
Having a closer look at the formulas for different loop shapes gives an
indication that there is a correlation between the inductance of a loop and
the ratio of perimeter^2/area.
If this is correct it would allow to get a formula for rectangular loops :
L = 0.4*(A+B)*(ln((A+B)/d)+7.6-0.35*(A+B)^2/(A*B))
where L = loop inductance in uH, A = loop height in m, B = loop length in m
and d = wire diameter in mm
The formula would be valid for loops where B/A does not exceed 6.
Does anyanoe have actualy measured the inductance of a big square loop ?
I would be interested to check the measured values against the calculated
ones.
Have just measured my aluminium 6.4m * 6.4m * 45mm field strength
measuring loop and it gives 26.5uH. I think the formula gives 25.3uH.
Each corner has two triangular reinforcing plates so the perimeter
will be a little shorter than 4*6.4m.
73, Brian
73 Brian CT1DRP IN51QD 41 09 58N 08 39 11W
http://homepage.esoterica.pt/~brian
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