Does anyone know if gridding a ground plane
under a trace of controlled impedance increases
or decreases by having to actually work with this?

I can guess and theorize all day long...
My guess is that since there's more distributed
capacitance with a solid ground plane, that
increasing the grid pattern of the ground will
lower the distributed capacitance thus INCREASING
the controlled impedance.

I'm using the following for my line thinking ...

Ideal Lossless Transmission Line

Z0 = [ L0/C0 ]^0.5

L0 = inductance per unit length

C0 = capacitance per unit length

Basic equation for characteristic impedance
over a solid ground plane.

The method to my madness is that if I'm restricted
by adjusting dimensional constraints for increasing
or decreasing impedance, that I can somehow fiddle
with gridding of the associated ground plane to
adjust for the impedance I need. Now there's alot
of other considerations that may involve current
distribution and such but right now, I'm not
worried about that.

Is this old stuff being hashed out again?
Or, have I stumbled onto a fabing secret?

Regards,  Doug McKean

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