Algorithm for an Estimation of the Electromagnetic Field Uniformity in the Working Volume of a Reverberation Chamber

A mode-stirred reverberation chamber (RC) is nowadays a commonly accepted performing tool for over-the-air (OTA) communication system evaluation, and their standardization is underway. Before performing active measurements of wireless communication systems using an RC, field uniformity inside the RC working volume has to be measured following the calibration method described in IEC standards 61000-4-21 and 61000-4-3, which requires 24 calibration measurements of field amplitude. In this contribution, we present the statistical laws that describe electromagnetic field maxima distribution, and based on them, a novel expression that could be useful to obtain a lower limit for the number of stirrer positions required at least to obtain a specific value for the normalized dispersion used to evaluate field uniformity with the IEC calibration method, being therefore of particular interest for OTA measurements.

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Research on Characteristics of Field Uniformity in Reverberation Chamber Using Two TX Antennas

IEICE Transactions on Communications ◽

10.1587/transcom.e95.b.2386 ◽

2012 ◽

Vol E95.B (7) ◽

pp. 2386-2392

Author(s):

Jung-Hoon KIM ◽

Tae-Heon JANG ◽

Sung-Kuk LIM ◽

Songjun LEE ◽

Sung-Il YANG

Keyword(s):

Reverberation Chamber ◽

Field Uniformity

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The Field Uniformity Analysis in a Triangular Prism Reverberation Chamber with a QRD

IEICE Transactions on Communications ◽

10.1587/transcom.e94.b.334 ◽

2011 ◽

Vol E94-B (1) ◽

pp. 334-337 ◽

Cited By ~ 1

Author(s):

Jung-Hoon KIM ◽

Hye-Kwang KIM ◽

Eugene RHEE ◽

Sung-Il YANG

Keyword(s):

Triangular Prism ◽

Reverberation Chamber ◽

Field Uniformity

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Development and Validation of New Reverberation Chamber for Wireless Devices

Wireless Communications and Mobile Computing ◽

10.1155/2018/7068601 ◽

2018 ◽

Vol 2018 ◽

pp. 1-12 ◽

Cited By ~ 2

Author(s):

Dong-Uk Sim ◽

Sang Il Kwak ◽

Jong Hwa Kwon ◽

Seong-Ook Park

Keyword(s):

Standard Deviation ◽

Electromagnetic Compatibility ◽

Initial Structure ◽

Wireless Devices ◽

Reverberation Chamber ◽

Working Volume ◽

Wireless Terminal ◽

Reasonable Approach ◽

Measurement And Evaluation ◽

Development And Validation

This paper proposes a reverberation chamber structure consisting of new reflectors and mode stirrers for electromagnetic compatibility and wireless terminal measurements. The key design considerations for them are determined through a reasonable approach to analyze the eigenmode for a reverberation chamber and the standard deviation of its working volume based on 3D simulation. The final designs are expected to improve the standard deviation performance of the initial structure of the reverberation chamber and provide a better mode stirring environment. The results measured in the fabricated chamber demonstrate that these predictions are clearly realized. The results satisfy the main requirements of this paper, which are defined in consideration of the specifications of commercial reverberation chamber products. Therefore, the reverberation chamber of this paper is expected to be useful for performance measurement and evaluation of commercial wireless terminals. To verify this logical approach to obtain a good design and its results, the results measured in the actual fabricated reverberation chamber are described along with analytical and computational results.

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Electric Field Uniformity Characteristic of a Reverberation Chamber with a Composite QRD

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.684.518 ◽

2013 ◽

Vol 684 ◽

pp. 518-521

Author(s):

Eugene Rhee ◽

Ji Hoon Lee

Keyword(s):

Electric Field ◽

Electromagnetic Compatibility ◽

Quadratic Residue ◽

Test Facility ◽

Uniform Electric Field ◽

Reverberation Chamber ◽

Standard Requirement ◽

International Standard ◽

Field Uniformity ◽

Simulation Results

This paper presents the electric field characteristics in a reverberation chamber which is an electromagnetic compatibility test facility that uses a stirrer to generate a uniform electric field inside it. In this paper, a diffuser is introduced from acoustics and newly designed to overcome problems of a stirrer. To validate the effect of a diffuser, a composite quadratic residue diffuser and a reverberation chamber are modeled. Then, the field uniformity inside the reverberation chamber is simulated by XFDTD 6.2 simulation program. Simulation results show that the electric field uniformity in the reverberation chamber satisfies the international standard requirement. This shows that the composite quadratic residue diffuser can be substituted for a stirrer.

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