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ground plane partial inductance (Read 3894 times)
aaron_do
Senior Fellow
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Posts: 1398
ground plane partial inductance
Oct 16
th
, 2012, 8:04am
Hi all,
does anybody have a ball-park estimate of the partial inductance between two points on a ground plane?
thanks,
Aaron
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there is no energy in matter other than that received from the environment - Nikola Tesla
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raja.cedt
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Posts: 1516
Germany
Re: ground plane partial inductance
Reply #1 -
Oct 16
th
, 2012, 10:42am
hello,
it is very difficult to ans up to me, it is strongly depends on which is ground plane and how far those two points.
Thanks,
Raj.
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aaron_do
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Posts: 1398
Re: ground plane partial inductance
Reply #2 -
Oct 16
th
, 2012, 8:29pm
I figure it depends on the size of the ground plane and the distance between the points. So there is no rule of thumb?
thanks,
Aaron
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there is no energy in matter other than that received from the environment - Nikola Tesla
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RFICDUDE
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Posts: 323
Re: ground plane partial inductance
Reply #3 -
Oct 17
th
, 2012, 3:38am
One paper says the inductance from one point to another on a perfect conductor is
Lg = ( μ × l ) / ( 2π )
where μ is the permeability.
I'm not sure how or if this changes when there are multiple points.
Usually I'm dependent on looking at quasi-static EM solutions that produce LRC results or try to analyze S-parameter results of EM solutions to extract the distributed inductance between multiple points (grounds). But I've never looked for a trend or compared analytical solutions like the one above.
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aaron_do
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Re: ground plane partial inductance
Reply #4 -
Oct 17
th
, 2012, 4:23am
Thanks, but what is 'n' in the equation? I guess I will try using an EM simulation.
regards,
Aaron
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there is no energy in matter other than that received from the environment - Nikola Tesla
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RFICDUDE
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Posts: 323
Re: ground plane partial inductance
Reply #5 -
Oct 17
th
, 2012, 6:23am
It is PI.
This might be a good problem for FastHenry.
There is a freeware PC version from FastFieldSolvers.
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