A fast mechanism identification approach for radiated EMI using near field measurement

Author

Zhao, Yang ; Yan, Wei ; Luo, Yongchao ; Li, Shijin ; Feng, Zhimin ; Rong, Rong ; Wen, Feng

Author_Institution

Sch. of Electr. & Autom. Eng., Nanjing Normal Univ., Nanjing, China

fYear

2010

fDate

12-16 April 2010

Firstpage

259

Lastpage

262

Abstract

In the paper, a fast approach is proposed to identify the mechanism for radiated EMI using near field measurement. Equivalent radiation models have been set up to analyze radiated source, which include electric dipole (Common Mode) and magnetic dipole (Differential Mode). In near field region, according to wave impedance theory, mechanism of radiated noise can be identified and noise reduction methods could be adopted. Blue tooth communication and PCBs are investigated to validate the approach. The results show that noise from blue tooth is CM noise and noise reduces by 40% after noise suppression.

Keywords

Bluetooth; electric impedance; electromagnetic interference; interference suppression; magnetic moments; printed circuits; Blue tooth communication; CM noise; PCB; common mode; differential mode; electric dipole; magnetic dipole; mechanism identification approach; near field measurement; near field region; noise reduction; noise suppression; radiated EMI; radiated noise; radiated source; wave impedance theory; Current measurement; Delta modulation; Electric variables measurement; Electromagnetic interference; Frequency measurement; Impedance measurement; Magnetic field measurement; Magnetic noise; Noise measurement; Noise reduction; Equivalent radiation model; Mechanism identification; Near field measurement; Radiated EMI; Wave impedance;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Compatibility (APEMC), 2010 Asia-Pacific Symposium on

Conference_Location

Beijing

Print_ISBN

978-1-4244-5621-5

Type

conf

DOI

10.1109/APEMC.2010.5475721

Filename

5475721