Cl. Holloway et Ga. Hufford, INTERNAL INDUCTANCE AND CONDUCTOR LOSS ASSOCIATED WITH THE GROUND PLANE OF A MICROSTRIP LINE, IEEE transactions on electromagnetic compatibility, 39(2), 1997, pp. 73-78
In previous work, a closed-form expression for the current density on
the ground plane of a microstrip line was presented, In this paper, we
show how this formula for the current density is used to derive an ex
pression for the internal inductance associated with the ground plane,
Results are presented for different geometries that illustrate when t
he internal inductance of the ground becomes comparable to the externa
l inductance of the microstrip line, We also illustrate that the integ
rals needed for the internal inductance calculation can be used to dev
elop an expression for the conductor loss associated with the ground p
lane.