Strategies for Feature-Assisted Development of Topology Agnostic Planar Antennas Using Variable-Fidelity Models

TL;DR

This paper presents a variable-fidelity, specification-oriented approach for automatically designing topology-agnostic planar antennas, reducing reliance on expert insight through classification and local tuning with minimal high-fidelity simulations.

Contribution

It introduces two novel strategies for bandwidth-specific and bandwidth-enhanced antenna design within a variable-fidelity framework, advancing automatic topology generation methods.

Findings

Strategies successfully generated diverse antenna topologies

Compared favorably against standard optimization methods

Achieved designs comparable or superior to state-of-the-art antennas

Abstract

Design of antennas for contemporary applications presents a complex challenge that integrates cognitive-driven topology development with the meticulous adjustment of parameters through rigorous numerical optimization. Nevertheless, the process can be streamlined by emphasizing the automatic determination of structure geometry, potentially reducing the reliance on traditional methods that heavily rely on engineering insight in the course of antenna development. In this work, which is an extension of our conference paper [1], a specification-oriented design of topologically agnostic antennas is considered by utilizing two strategies focused on bandwidth-specific design and bandwidth-enhanced optimization. The process is embedded within a variable-fidelity framework, where the low-fidelity optimization involves classification of randomly generated topologies, followed by their local tuning using a trust-region algorithm applied to a feature-based representation of structure response. The final result is then tuned using just a handful of high-fidelity simulations. The strategies under consideration were verified on a case study basis concerning automatic generation of three radiators with varying parameters. Benchmarks of the algorithm against more standard optimization methods, as well as comparisons of the obtained topologies with respect to state-of-the-art antennas from literature have also been considered.