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ground plane partial inductance (Read 3900 times)

aaron_do Senior Fellow Offline 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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raja.cedt Senior Fellow Offline 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 Senior Fellow Offline 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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RFICDUDE

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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 Senior Fellow Offline Posts: 1398	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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RFICDUDE Community Fellow Offline 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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