Speaker
Description
Electrical contact is an important issue to high power
microwave sources, pulsed power systems, field emitters,
thin film devices and integrated circuits, and interconnects,
etc. Contact resistance, and the enhanced ohmic heating that
results, have been treated mostly under steady state (DC)
condition. In this paper, we consider the AC contact
resistance for a simple geometry [1], namely, that of two
semi-infinite slab conductors of different thicknesses joint at
z = 0. The conductivity of the two slabs may assume different
values. In the DC case, this model was solved exactly by
Zhang and Lau [1]. We have constructed an exact solution
under AC condition, and we have shown that in the limit of
zero frequency, our AC solution reduces to those of Ref. [1].
New features that accompany AC condition, such as the
resistive skin effect, inductive, and capacitive effects, as well
as radiation losses are explored.
[1] P. Zhang and Y. Y. Lau, J. Appl. Phys. 108, 044914
(2010).
*Work supported by Air Force Office of Scientific Research
Award No. FA9550-18-1-0153, and L3 Technologies
Electron Devices Division.
