PERFORMANCE ANALYSIS OF EMI SENSOR IN DIFFERENT TEST SITES WITH DIFFERENT WAVE IMPEDANCES

Electromagnetic Interference (EMI) is becoming a crucial issue in the era of modern electronic systems. For EMI measurement, it is required to place a sensor to receive the radiation from the equipment in a suitable test environment. The performance of the sensor depends on its Antenna Factor, which is the ratio of the incident electric field on the antenna surface to the received voltage at the load end. Here, a Method of Moment-based numerical technique has been used to evaluate the performance of a sensor in different test environments with different wave impedances. The evaluation of the sensor has been performed in terms of the Antenna Factor. The results are presented for free space environment of impedance 377Ω and Gigahertz Transverse Electromagnetic (GTEM) Cell of characteristic impedance 50Ω. The results show well agreement with experimental data.

[1]  C. Balanis.  Advanced Engineering Electromagnetics , 1989 .

[2]  Albert Smith,et al.  Standard-Site Method for Determining Antenna Factors , 1982, IEEE Transactions on Electromagnetic Compatibility.

[3]  J.D.M. Osburn,et al.  Measuring EMC Antenna Factors In The GHz Transverse Electromagnetic Cell , 1992, International Symposium on Electromagnetic Compatibility.

[4]  Ke Wang,et al.  Numerical simulation of the antenna factor of a broadband dipole antenna , 2001, 2001 IEEE EMC International Symposium. Symposium Record. International Symposium on Electromagnetic Compatibility (Cat. No.01CH37161).

[5]  Roger F. Harrington,et al.  Field computation by moment methods , 1968 .

[6]  Christos Christopoulos,et al.  Introduction to Electromagnetic Compatibility , 2007 .

[7]  LOADED WIRE ANTENNA AS EMI SENSOR , 2005 .

[8]  B. Kolundžija.  Electromagnetic modeling of composite metallic and dielectric structures , 1996, IEEE Antennas and Propagation Society International Symposium 1997. Digest.

[9]  R. Harrington.  Time-Harmonic Electromagnetic Fields , 1961 .

[10]  J.D.M. Osburn,et al.  Radiated emissions test performance of the GHz TEM cell , 1991, IEEE 1991 International Symposium on Electromagnetic Compatibility.