Design of Chaotic Cavities with Curved Wave Diffractors for Enhanced Low-Frequency Operation

TL;DR

This paper explores how the geometric design of chaotic cavities with curved wave diffractors influences their electromagnetic mode density and quality factor, aiming to improve low-frequency performance in reverberation chambers.

Contribution

It introduces a novel cavity design with curved diffractors that enhances mode density and Q factor at low frequencies, based on numerical analysis and the generalized Weyl law.

Findings

Increased mode density at low frequencies

Enhanced Q factor in the designed cavity

Potential for reducing lowest usable frequency

Abstract

Some numerical calculations are presented on the dependence of the average mode count and average mode density of electromagnetic cavities on their specific geometric design, based on the generalized Weyl law. The analysis focuses on a chaotic quasi-cubic cavity furnished with curved wave diffractors placed on its interior surface. The focus is on a design that increases the mode density and Q at relatively low frequencies. The results are of interest in reducing the `lowest usable frequency' and increasing the maximum field strength inside mode-stirred reverberation chambers.