Effect of Loading on Field Uniformity: Energy Diffusion in Reverberant Environments

M. P. Robinson; I. D. Flintoft; J. F. Dawson; A. C. Marvin; F. I. Funn; L. Dawson; Xiaotian Zhang

Effect of Loading on Field Uniformity: Energy Diffusion in Reverberant Environments

M. P. Robinson, I. D. Flintoft, J. F. Dawson, A. C. Marvin, F. I. Funn, L. Dawson, Xiaotian Zhang

Electronic Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

In reverberant electromagnetic environments such as reverberation chambers, shielding enclosures, vehicles and buildings, the electromagnetic energy density is often assumed to be uniform and the direction of arrival of electromagnetic waves (Poynting vector) and their polarisation is assumed uniformly distributed. This is the basis of the power balance method for electromagnetic coupling analysis and much of the theory of reverberation chambers. However significant field inhomogeneity is often encountered in practice when significant losses are present. In this paper we show why this must be so when an energy flow exists from the source of energy to absorptive elements, and how the non-uniformity can be determined using a diffusion based solution. The diffusion based solution, though not as computationally efficient as the power balance method, is still much more efficient than a full-wave approach.

Original language	English
Title of host publication	32nd URSI General Assembly and Scientific Symposium (URSI GASS)
Place of Publication	Montreal
Number of pages	4
Publication status	Published - 19 Aug 2017

Keywords

reverberation chamber
electromagnetic shielding

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NB: URSI have non exclusive rights to publish and to allow IEEE to place on IEEE Explore
Accepted author manuscript, 365 KBLicence: CC BY-NC-ND

1 Active

Electromagnetic shielding properties of Materials, and Enclosures
Dawson, J. F., Marvin, A., Flintoft, I. D., Dawson, L., Porter, S. J., Robinson, M. P. & Yan, J.
1/01/90 → …
Project: Other project › Miscellaneous project

Cite this

@inproceedings{e53dbf38dac14ea5a043df3ba900647c,

title = "Effect of Loading on Field Uniformity: Energy Diffusion in Reverberant Environments",

abstract = "In reverberant electromagnetic environments such as reverberation chambers, shielding enclosures, vehicles and buildings, the electromagnetic energy density is often assumed to be uniform and the direction of arrival of electromagnetic waves (Poynting vector) and their polarisation is assumed uniformly distributed. This is the basis of the power balance method for electromagnetic coupling analysis and much of the theory of reverberation chambers. However significant field inhomogeneity is often encountered in practice when significant losses are present. In this paper we show why this must be so when an energy flow exists from the source of energy to absorptive elements, and how the non-uniformity can be determined using a diffusion based solution. The diffusion based solution, though not as computationally efficient as the power balance method, is still much more efficient than a full-wave approach.",

keywords = "reverberation chamber, electromagnetic shielding",

author = "Robinson, {M. P.} and Flintoft, {I. D.} and Dawson, {J. F.} and Marvin, {A. C.} and Funn, {F. I.} and L. Dawson and Xiaotian Zhang",

year = "2017",

month = aug,

day = "19",

language = "English",

booktitle = "32nd URSI General Assembly and Scientific Symposium (URSI GASS)",

}

TY - GEN

T1 - Effect of Loading on Field Uniformity

T2 - Energy Diffusion in Reverberant Environments

AU - Robinson, M. P.

AU - Flintoft, I. D.

AU - Dawson, J. F.

AU - Marvin, A. C.

AU - Funn, F. I.

AU - Dawson, L.

AU - Zhang, Xiaotian

PY - 2017/8/19

Y1 - 2017/8/19

N2 - In reverberant electromagnetic environments such as reverberation chambers, shielding enclosures, vehicles and buildings, the electromagnetic energy density is often assumed to be uniform and the direction of arrival of electromagnetic waves (Poynting vector) and their polarisation is assumed uniformly distributed. This is the basis of the power balance method for electromagnetic coupling analysis and much of the theory of reverberation chambers. However significant field inhomogeneity is often encountered in practice when significant losses are present. In this paper we show why this must be so when an energy flow exists from the source of energy to absorptive elements, and how the non-uniformity can be determined using a diffusion based solution. The diffusion based solution, though not as computationally efficient as the power balance method, is still much more efficient than a full-wave approach.

AB - In reverberant electromagnetic environments such as reverberation chambers, shielding enclosures, vehicles and buildings, the electromagnetic energy density is often assumed to be uniform and the direction of arrival of electromagnetic waves (Poynting vector) and their polarisation is assumed uniformly distributed. This is the basis of the power balance method for electromagnetic coupling analysis and much of the theory of reverberation chambers. However significant field inhomogeneity is often encountered in practice when significant losses are present. In this paper we show why this must be so when an energy flow exists from the source of energy to absorptive elements, and how the non-uniformity can be determined using a diffusion based solution. The diffusion based solution, though not as computationally efficient as the power balance method, is still much more efficient than a full-wave approach.

KW - reverberation chamber

KW - electromagnetic shielding

M3 - Conference contribution

BT - 32nd URSI General Assembly and Scientific Symposium (URSI GASS)

CY - Montreal

ER -

Effect of Loading on Field Uniformity: Energy Diffusion in Reverberant Environments

Abstract

Keywords

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Projects

Electromagnetic shielding properties of Materials, and Enclosures

Cite this