A Transient Port-Extraction Technique for Antenna Feed Optimization

TL;DR

This paper introduces a transient port-extraction method that simplifies the optimization of non-linear antenna feeds by efficiently representing the electromagnetic system, enabling integration with various optimization schemes.

Contribution

The paper presents a novel transient port-extraction technique that decouples the electromagnetic system from the optimization process, improving efficiency and flexibility.

Findings

Effective optimization of non-linear antenna feeds demonstrated.

Method reduces computational cost of coupled electromagnetic and circuit analysis.

Compatible with diverse optimization algorithms.

Abstract

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.