Characterization of radiated EMI generated by digital wireless speaker

Author

Yongchao Luo ; Yang, Zhao ; Wei, Yan ; Shijin, Li ; Dong, Yue

Author_Institution

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

fYear

2009

fDate

16-20 Sept. 2009

Firstpage

373

Lastpage

376

Abstract

In the paper, a fast analysis method by using near-field probes is proposed to diagnose radiated EMI mechanism for digital wireless speaker based on the inner relationship between radiated electromagnetic (EM) field and wave impedance. The results show CM noise dominates radiated EMI noise when frequency is below 300 MHz. Furthermore, a new method by using radio frequency (RF) circuit probes is used to estimate radiated EMI noise. By analyzing measurement in 3-m chamber with Ferrite Core or not, the research shows that the proposed method is convenient and efficient.

Keywords

electromagnetic interference; probes; EMI; digital wireless speaker; electromagnetic field; electromagnetic interference; fast analysis method; ferrite core; near-field probes; radio frequency circuit probes; wave impedance; Character generation; Circuit noise; Electromagnetic analysis; Electromagnetic fields; Electromagnetic interference; Electromagnetic radiation; Electromagnetic scattering; Impedance; Probes; Radio frequency; Digital wireless speaker; Noise estimation; Radiated EMI;

fLanguage

English

Publisher

ieee

Conference_Titel

Environmental Electromagnetics, 2009. CEEM 2009. 5th Asia-Pacific Conference on

Conference_Location

Xian

Print_ISBN

978-1-4244-4344-4

Type

conf

DOI

10.1109/CEEM.2009.5303704

Filename

5303704