Electromagnetic Field Distribution Analysis on Reverberation Chamber using Electromagnetic Diffusion Method

전자파 확산방식을 이용한 잔향실 내부의 필드 분포 해석

  • Published : 2000.08.01

Abstract

This paper presents the results of an electromagnetic field analysis for a reverberation chamber that is an alternative method of a shielded anechoic chamber, which is widely used for the analysis and measurement of electromagnetic interference and immunity test. Inside the defined test volume of the rectangular and triangular type, the Schroeder Quadratic Residue Diffuser was employed. FDTD(Finite-Difference Time-Domain) simulation method was applied to produce the field characteristics inside those reverberation chambers. According to the results, field uniformities on the aforementioned two types of reverberation chambers were correlated within $\pm$3dB, and $\pm$4.4dB tolerances, and rectangular type reverberation chamber shows an independent polarization result.

본 논문은 전자파 장해 및 복사내성 측정에 사용되는 전자파 무반사실의 대용 방법으로 활용될 수 있는 전자파 잔향실의 전자기장 특성에 관하여 연구하였다. 체적이 동일한 직사각형 및 삼각형 구조의 잔향실 내부 필드균일성을 확보하기 위하여 Shroeder diffuser 방식을 적용하였으며, FDTD(Finite-Difference Time-Domain) 방법을 사용하여 잔향실 내부의 필드 특성을 조사하였다. 앞에서 언급한 두 가지 형태의 잔향실 내부에서 필드 특성을 조사하기 위해 시험공간 내의 75% 샘플을 가지고 분석하였다. 직사각형 잔향실의 경우 최대 $\pm$3dB, 삼각형 잔향실의 경우 최대 $\pm$4.4dB 내의 tolerance를 나타내었으며, 또한 직사각형 잔향실의 경우 편파에 대해서도 독립적이라는 결과를 얻을 수 있었다.

Keywords

References

  1. A new approach to electromagnetic field-strength measurements in shielded enclosures wescon Tech. Paper Mendes H. A.
  2. Design evaluation and use of a reverberation chamber for performing electromagnetic susceptibility/vulnerability measurements M. L. Crawford;G. H. Koepke
  3. Annex XX: Alternative method Reverberation chamber method(Draft document 77B/215/CD)
  4. IEEE Symposium on EMC Frequency Characterization of Reverberation Chambers Hatfield, M. O.;Slocum, M. B.
  5. EMR Test Facilities-Evaluation of Reverberating Chamber Located at RADC, Griffiss AFB, Rome, NY Crawford, M. L.;Koepke, G. H.;Ladbury, J. M.
  6. EMR Test Facilities Evaluation of Reverberating Chamber Located at Naval Surface Weapons Center, Dahlgren, Virginia Crawford, M. L.;Koepke, G. H.
  7. IEEE Symposium on EMC High Field Strength in a Large Volume: The Intrinsic Reverberation Chamber Frank B. J. Leferink
  8. IEEE Trans. on EMC. v.41 no.4 Investigation of the Field Uniformity of a Mode-Stirred Chamber Using Diffusers Based on Acoustic Theory Markus Petirsch;Adolf Josef Schwab
  9. J. Acoust. Soc. Am. v.57 Diffuse Sound Reflection by Maximum Length Sequences M. R. Schroeder
  10. J. Acoust. Soc. Am. v.60 Response to Comments on Diffuse Sound Reflection by Maximum Length Sequences M. R. Schroeder;R. Gerlach
  11. J. Acoust. Soc. Am. v.65 Binaural Dissimilarity and Optimum Ceilings for Concert Halls: More Lateral Sound Diffusion M. R. Schroeder
  12. Measurement Science & Technology v.10 no.3 Conducting triangular chambers for EMC measurements Yi Huang
  13. Architectural Acoustics Principles and Design Madan Mehta;James Johnson
  14. IEEE Trans. Antennas and Propag. v.14 Numerical solution of initial boundary value problems involving Maxwell's equation in isotropic media K. S. Yee
  15. IEEE Trans. Microwave Theory Tech. v.23 no.8 Numerical solution of steady-state electromagnetic scattering problems using the time dependent Maxwell's equation A. Taflove;M. E. Brodwin
  16. Numerical Solution of Partial Diffential Equation: Finite Difference Method(8th Edition) G. M. Smith
  17. Scientia Sinica(series A) v.13 A transmission boundary for transient wave analysis Z. P. Liao;H. L. Wong;B. P. Yang;Y. F. Yuan
  18. IEEE Symposium on EMC Reverberation Chamber Modeling Using FDTD Lizhou Bai;Lin Wang;Baikuan Wang;Jianjian song
  19. Electromagnetic Compatibility, Part 4, Testing and measurement techniques, Section 3. Radiated, radio-frequency, electromagnetic field immunity