Exceptional Point Perspective of Periodic Leaky-Wave Antennas
Applied Physics
2023-04-07 v1
Abstract
Over the past decade, the issue of gain degradation at broadside in periodic leaky-wave antennas (P-LWAs) has been resolved, using a circuit modeling approach, by introducing proper asymmetry in the unit cell of the antenna structure. This paper provides a more fundamental and insightful perspective of the problem by showing, using a simple coupled-mode analysis, that the optimal level of structural asymmetry corresponds to an exceptional point of the coupling parameter between the two eigenmodes of the P-LWA. This contribution represents a key step towards the development of a full electromagnetic resolution of the broadside issue.
Keywords
Cite
@article{arxiv.2304.03180,
title = {Exceptional Point Perspective of Periodic Leaky-Wave Antennas},
author = {Amar Al-Bassam and Dirk Heberling and Christophe Caloz},
journal= {arXiv preprint arXiv:2304.03180},
year = {2023}
}