RF Coil Inductance

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Definition:                           

Equation

Parameters

Diagram

Calculate Inductance:              top

Parameter

Value

Units

Special Values

Inputs:

R (coil radius)
H (coil height)
N (# of turns)    
 

Outputs:  

L (inductance)

l (wire length)

P (coil pitch)    

 

Output Format:                                                        top

Select Format: Scientific Engineering Fixed

 

Notes:                                                                       top

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Inductance is an empirical approximation AFAIK
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Note that L doesn't depend on wire diameter!
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Assumes a coil with only a few turns
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Bruce Weber has compared this formula to one in Lorrain and Corson (E&M textbook) and found agreement when coil length > coil radius.
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Sources: 
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Inductance from Amateur Radio Handbook
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My own formulae for length!

Copyright 2006  Raymond J. Allen