Electromagnetic-wave visualization for EMI using a new holographic method
Electronics & communications in Japan. Part 1, Communications ,
v.82 no.8 ,
1999년, pp.52 - 60
Kitayoshi, Hitoshi
(Advantest Laboratories Ltd., Sendai, Japan 989-31)
,
Sawaya, Kunio
(Faculty of Engineering, Tohoku University, Sendai, Japan 980-77)
This paper discusses a method in which a wave source is visualized by electromagnetic wave holography by scanning the receiver antenna on a plane. The method presented in this paper does not use the Fresnel approximation or the Fraunhofer approximation, and there is no constraint on the distance bet...
This paper discusses a method in which a wave source is visualized by electromagnetic wave holography by scanning the receiver antenna on a plane. The method presented in this paper does not use the Fresnel approximation or the Fraunhofer approximation, and there is no constraint on the distance between the measuring plane and the object of observation. By partitioning the object of observation, the method can be applied, even if the object of observation is larger than the hologram measuring plane. The two-dimensional fast Fourier transform is introduced to each of the partitioned planes, so that the speed of the numerical integration is improved. To improve the accuracy of the intensity of the reconstructed image, the directivity of the receiving antenna is considered. For observation of the leaked electromagnetic wave in a real system, a hologram observation system is proposed in which some variation of the observation frequency can be tolerated. Using the proposed observation system, the radiation from a dipole antenna is observed, and a computer simulation is performed. These results show that the resolution is improved and that a wider range of observation is realized than in the conventional method. Lastly, as an application example, the leaked electromagnetic waves from a metal cabinet are observed on a 57 cm × 57 cm plane at a distance of 200 cm, and a visualized result for 285 cm × 285 cm is presented. © 1999 Scripta Technica, Electron Comm Jpn Pt 1, 82(8): 52–60, 1999
This paper discusses a method in which a wave source is visualized by electromagnetic wave holography by scanning the receiver antenna on a plane. The method presented in this paper does not use the Fresnel approximation or the Fraunhofer approximation, and there is no constraint on the distance between the measuring plane and the object of observation. By partitioning the object of observation, the method can be applied, even if the object of observation is larger than the hologram measuring plane. The two-dimensional fast Fourier transform is introduced to each of the partitioned planes, so that the speed of the numerical integration is improved. To improve the accuracy of the intensity of the reconstructed image, the directivity of the receiving antenna is considered. For observation of the leaked electromagnetic wave in a real system, a hologram observation system is proposed in which some variation of the observation frequency can be tolerated. Using the proposed observation system, the radiation from a dipole antenna is observed, and a computer simulation is performed. These results show that the resolution is improved and that a wider range of observation is realized than in the conventional method. Lastly, as an application example, the leaked electromagnetic waves from a metal cabinet are observed on a 57 cm × 57 cm plane at a distance of 200 cm, and a visualized result for 285 cm × 285 cm is presented. © 1999 Scripta Technica, Electron Comm Jpn Pt 1, 82(8): 52–60, 1999
주제어
참고문헌 (11)
Radar holography Matsuo 1980 Radar holography. IEICEJ 1980.
Wave signal processing Aoki 1986 Wave signal processing. Morikita Shuppan Co.; 1986.
Trans IEICEJ Kikuchi J68-B 1194 1985
Modern spectrum analysis Kesler II 1986 ed. Modern spectrum analysis II. IEEE Press; 1986.
IEEE Trans Acust Speech Signal Proc Roy ASSP-37 984 1989 10.1109/29.32276
Trans IEICEJ Kikuchi J69-B 949 1986
Trans IEICEJ Kitayoshi J76-A 78 1993
Trans IEICEJ Kitayoshi J76-A 687 1993
Trans IEICEJ Aoki J57-B 511 1974
IEEE Trans Antennas Propag Yaghjian AP-34 30 1986 10.1109/TAP.1986.1143727
Proc IECEJ Tejirogi 62 1145 1974
더보기
AI-Helper
※ AI-Helper는 부적절한 답변을 할 수 있습니다.