  Optimization of strongly non-linear tightly coupled feeds attached to
antennas is a challenging problem from a purely computational perspective. One
can imagine that an optimization would (a) need to be in the time domain, and
(b) has to be self-consistently coupled with the linear antenna (or
electromagnetic) system. These two imply that the cost of optimization is
governed by the need to repeatedly evaluate the fully coupled cost function.
This paper leverages a recently developed transient port-extraction technique
to circumvent this challenge and is agnostic to the optimization scheme. This
approach provides a representation of the entire linear electromagnetic system
at the port and can readily integrate with any non-linear circuit analysis and
optimization methodology. In this paper, we demonstrate optimization of linear
and non-linear circuit feed parameters that are tightly coupled to broadband
radiating systems.
