Any length of wire has some inductance, however, at low frequencies,
1-30 MHz, the added effect of this inductance is usually minimum.
At VHF and UHF frequencies the inductance of a wire may have a great
effect on a circuit. Now, there is no diagram for this because it
is simply a straight round wire in free space. By free space
I mean, it is far enough from grounds or other wires so that
they have minimum effect.
2b
L = K * b * {[ln(----)] - 0.75}
a
Where:
L = Inductance in uH
K = 0.00508 (dims in inchs)
0.0002 (dims in mm)
a = wire radius (in or mm)
b = wire length (in or mm)
ln = Natural Logarithm
= 2.303 * Common Log(base 10)
|
At VHF frequencies, and above, skin effect will
reduce the inductance. The constant, 0.75 will approach infinity,
however, skin effect will not reduce the inductance by more than a
few percent.
Enter your data below. Internally, all input
data is converted to inches for calculation purposes, however, for
entry purposes, the dimensions can be mixed or matched.
Wire Size (a)
(AWG, in, or mm)
Length of Wire (b)
(in, or mm)
Inductance
|
