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A Study on Near-Field to Far-Field Transformation Using Stratton-Chu Formula

Stratton-Chu 공식을 이용한 측정된 근거리장에서 원거리장으로의 변환에 관한 연구

  • Lee, Jeong-Seok (Department of Electrical & Electronic Engineering, Yonsei University) ;
  • Song, Tae-Lim (Department of Electrical & Electronic Engineering, Yonsei University) ;
  • Du, Jin-Kyoung (Department of Electrical & Electronic Engineering, Yonsei University) ;
  • Koo, Tae-Wan (Department of Electrical & Electronic Engineering, Yonsei University) ;
  • Yook, Jong-Gwan (Department of Electrical & Electronic Engineering, Yonsei University)
  • 이정석 (연세대학교 전기전자공학과) ;
  • 송태림 (연세대학교 전기전자공학과) ;
  • 두진경 (연세대학교 전기전자공학과) ;
  • 구태완 (연세대학교 전기전자공학과) ;
  • 육종관 (연세대학교 전기전자공학과)
  • Received : 2012.11.30
  • Accepted : 2013.02.20
  • Published : 2013.03.31

Abstract

This paper deals with the near-field to far-field calculation for far-field characteristics of antenna and electromagnetic compatibility(EMC) testing. Since the conventional EMC testing process is inefficient such as measurements of the wide band signals and mega structures, Stratton-Chu formula is used to predict the far-field emission by simple and direct process. The usefulness of Stratton-Chu formula is verified by comparing to the analytic solution of the uniform distribution aperture in free-space. In order to inspect the far-fields and to get the near-field values, full-wave simulation solver is utilized. Through the full-wave simulation about the patch antenna, calculated far-field results from Stratton-Chu formula are proven. The predicted magnitudes of the far-field are in error by less than 6 %.

본 논문에서는 안테나의 원거리장 특성 및 Electromagnetic Compatibility(EMC) testing을 위한 근거리 원거리장 변환에 대한 연구이다. EMC testing은 광대역 신호 및 거대 구조에 대한 원거리장 측정과 같은 복잡한 과정이 필요하다. EMC 측정 문제를 해결하기 위해, Stratton-Chu 공식을 이용하여 간단하고 직접적인 방법으로 원거리장을 예측하였다. 특히 Stratton-Chu 공식을 이용한 예측은 자유 공간상의 평면파를 통해 해석값을 비교하여 유효성을 검증했다. 패치 안테나의 근거리장 추출과 원거리장 확인을 위해, full-wave 시뮬레이션을 이용하여 Stratton-Chu 계산 결과를 비교 및 검증하였으며, 6 % 이내의 오차로 원거리장의 크기를 예측했다.

Keywords

References

  1. Andriy Radchenko, Ji Zhzng, Keong Kam, and David Pommerenke, "Numerical evaluation of nearfield to far-field transformation robustness for EMC", IEEE Int. Symp. Electromagnetic Compatibility, pp 605-611, Aug. 2012.
  2. Edward B. Joy, "A brief history of the development of the near-field measurement technique at the georgia institute of technology".
  3. C. I. S. P. R. Publ. 22: Information technology equipment radio disturbance characteristics limits and methods of measurement IEC, Edition 5:2005.
  4. Tapan Kumar Sarkar, Fellow, IEEE, and Ardalan Taaghol, "Near-field to near/far-field transformation for arbitrary near-field geometry utilizing an equivalent electric current and MoM", IEEE Trans. on Antennas and Propagation, vol. 47, no. 3, pp. 566-573, Mar. 1999. https://doi.org/10.1109/8.768793
  5. Peter Petre, Tapan K. Sarkar, and Fellow, IEEE, "Planar near-field to far-field transformation using an equivalent magnetic current approach", IEEE Trans. on Antennas and Propagation, vol. 40, no. 11, pp. 1348-1356, Nov. 1992. https://doi.org/10.1109/8.202712
  6. A. C. Newell, "Error analysis techniques for planar near-field measurements", IEEE Trans. Antennas Propagation, vol. AI-36, pp. 754-768, Jun. 1988.
  7. S. Ponnapolli, T. K. Sarkar, and P. Petre, "Nearfield to far-field transformation using an equivalent current approach", in Proc. Int. Conf. Antennas Propagation, London, Ontario, Jun. 1991.
  8. T. K. Sarkar, P. Petre, A. Taaghol, and R. F. Harrington, "An alternate spherical near-field to farfield transformation", Progress in Electromagnetic Research, Boston, MA: EMW, pp. 268-284, vol. 16, 1997.
  9. R. F. Harrington, Time-Harmonic Electromagnetic Fields, John Wiley & Sons, Inc., pp. 95-134, 2001.
  10. J. A. Stratton, L. J. Chu, "Diffraction theory of electromagnetic waves", Physical Review, vol. 56, no. 1, pp. 99-107, Jul. 1939. https://doi.org/10.1103/PhysRev.56.99
  11. Chen-To Tai, "Kirchhoff theory: scalar, vector, or dyadic?", IEEE Trans. on Antennas and Propagation, vol. 20, no. 1, pp. 114-115, Jan. 1972. https://doi.org/10.1109/TAP.1972.1140146
  12. Shaolin Liao, Ronald J. Vernon, "A new fast algorithm for calculating near-field propagation between arbitrary smooth surfaces", IEEE Conf. on Infrared and Millimeter Waves & 13th Intl., 606-607, Sep. 2005.
  13. C. A. Balanis, Antenna theory: Analysis and Design, Third Edition, John Wiley & Sons, Inc., pp. 653-738, 2005.