Effect of Adding Wave Diffractors Within Reverberation Chambers on the Frequency Spacing of Adjacent Resonant Modes

TL;DR

This study investigates how inserting wave diffractors in reverberation chambers affects the frequency spacing of resonant modes, using a recent mode extraction method to compare configurations.

Contribution

It introduces an analysis of diffractors' impact on chamber performance, comparing configurations with and without diffractors while controlling for quality factor changes.

Findings

Differences in frequency spacing are within measurement uncertainties.

Adding diffractors does not significantly alter resonant mode characteristics.

The method effectively compares chamber configurations with and without diffractors.

Abstract

This paper takes advantage of a recent method able to extract the characteristics of resonant modes in a metallic enclosure such as a reverberation chamber (RC). The aim here is to analyze, the effect of inserting curvilinear objects within a parallelepiped RC on the chamber performances, particularly from the point of view of the frequency spacing of adjacent resonant modes. Two configurations are compared: one is a parallelepiped RC with added curvilinear diffracting objects, and the other is the same chamber without diffractors but with added absorbers to compensate the decrease of the quality factor. The obtained results exhibit differences that fall within the measurement uncertainties.