Numerical Study of Position Stirring and Frequency Stirring in a Loaded Reverberation Chamber

Carlberg, Ulf; Kildal, Per-Simon; Carlsson, Jan

doi:10.1109/temc.2008.2011818

Cited by 31 publications

(23 citation statements)

References 17 publications

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“…In the EMC community, EM cavities are called EM reverberation chambers (RCs). Thanks to mechanical [9][10][11] or electronic stirring [9,[11][12][13], enabling ensemble averaging, and to the presence of losses leading to modal overlap, the systems under test are submitted to a supposedly statistically isotropic, uniform, and depolarized electromagnetic field. The statistical description of the EM field inside RCs commonly used by the EMC community was originally proposed by Hill [14], who made a continuous plane wave spectrum hypothesis.…”

Section: Introductionmentioning

confidence: 99%

Lossy chaotic electromagnetic reverberation chambers: Universal statistical behavior of the vectorial field

et al. 2016

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The effective Hamiltonian formalism is extended to vectorial electromagnetic waves in order to describe statistical properties of the field in reverberation chambers. The latter are commonly used in electromagnetic compatibility tests. As a first step, the distribution of wave intensities in chaotic systems with varying opening in the weak coupling limit for scalar quantum waves is derived by means of random matrix theory. In this limit the only parameters are the modal overlap and the number of open channels. Using the extended effective Hamiltonian, we describe the intensity statistics of the vectorial electromagnetic eigenmodes of lossy reverberation chambers. Finally, the typical quantity of interest in such chambers, namely, the distribution of the electromagnetic response, is discussed. By determining the distribution of the phase rigidity, describing the coupling to the environment, using random matrix numerical data, we find good agreement between the theoretical prediction and numerical calculations of the response.

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Section: Introductionmentioning

confidence: 99%

Lossy chaotic electromagnetic reverberation chambers: Universal statistical behavior of the vectorial field

et al. 2016

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“…Moreover, the evaluation time of the CGF increases cubically with frequency. Thus, previous research concentrated on the simulation of cavities containing small, one-dimensional objects, such as dipole antennas [2]- [5], or the simulation of two-dimensional (2-D) cavities [1].…”

Section: Introductionmentioning

confidence: 99%

“…Most researchers used the Ewald summation technique [12] to evaluate the CGF [2], [3], [5]- [7], [9]. The Ewald summation technique splits the CGF in two exponentially convergent series: 1) the spatial and 2) the spectral series.…”

Section: Introductionmentioning

confidence: 99%

A Hybrid Ewald-Spectral Cavity Green’s Function Boundary Element Method With Spectral Domain Acceleration for Modeling of Over-Moded Cavities

Gruber

Eibert

2015

IEEE Trans. Antennas Propagat.

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A hybrid Ewald-spectral cavity Green's function (CGF) boundary element method (BEM) with spectral domain acceleration is presented. In contrast to all previous work on the CGF BEM, the presented method relieves the two major drawbacks of the CGF approach: 1) the high-frequency complexity is decreased using a hybrid Ewald-spectral representation of the CGF and 2) the costly evaluation of the interaction integrals is accelerated with a fast group spectral domain approach. Results demonstrate that cavities containing small, medium-sized, and large objects are efficiently modeled over a wide frequency range. Index Terms-Boundary element method (BEM), cavityGreen's function (CGF), over-moded cavities, reverberation chambers, spectral domain approach. 0018-926X

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“…Most of the effort in the analysis and design of reverberation chambers is directed toward the solution of the deterministic electromagnetic problem (in the presence of specific sources). Method of Moments (MoM) is one of the most frequently used techniques for this type of problem in its simple form or extended by other techniques in a hybrid scheme [6][7][8][9][10][11][12][13][14][15][16]. Maybe the most complete work in this area is that of Bruns' [6,7].…”

Section: Introductionmentioning

confidence: 99%

Finite Element Based Eigenanalysis for the Study of Electrically Large Lossy Cavities and Reverberation Chambers

Zekios¹,

Allilomes²,

Chryssomallis³

et al. 2014

PIER B

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An eigenanalysis-based technique is presented for the study and design of large complicated closed cavities and particularly Reverberation Chambers, including conductor and dielectric material losses. Two different numerical approaches are exploited. First, a straightforward approach is adopted where the finite walls conductivity is incorporated into the Finite Element Method (FEM) formulation through the Leontovich Impedance boundary conditions. The resulting eigenproblem is linearized through an eigenvalue transformation and solved using the Arnoldi algorithm. To address the excessive computational requirements of this approach and to achieve a fine mesh ensuring convergence, a novel approach is adopted. Within this, a linear eigenvalue problem is formulated and solved assuming all metallic structures as perfect electric conductors (PEC). In turn, the resulting eigenfunctions are postprocessed within the Leontovich boundary condition for the calculation of the metals finite conductivity losses. Mode stirrer design guidelines are setup based on the eigenfunction characteristics. Both numerical eigenanalysis techniques are validated against an analytical solution for the empty cavity and a reverberation chamber simulated by a commercial FEM simulator. A series of classical mode stirrers are studied to verify the design guidelines, and an improved mode stirrer is developed.

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Numerical Study of Position Stirring and Frequency Stirring in a Loaded Reverberation Chamber

Cited by 31 publications

References 17 publications

Lossy chaotic electromagnetic reverberation chambers: Universal statistical behavior of the vectorial field

Lossy chaotic electromagnetic reverberation chambers: Universal statistical behavior of the vectorial field

A Hybrid Ewald-Spectral Cavity Green’s Function Boundary Element Method With Spectral Domain Acceleration for Modeling of Over-Moded Cavities

Finite Element Based Eigenanalysis for the Study of Electrically Large Lossy Cavities and Reverberation Chambers

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