Title :
An Evaluation Method for Radiated Emissions of Components and Modules in Mobile Devices
Author :
Eakhwan Song ; Hark-Byeong Park ; Hyun Ho Park
Author_Institution :
Dept. of Electron. & Commun. Eng., Kwangwoon Univ., Seoul, South Korea
Abstract :
In this paper, a component-level electromagnetic interference (EMI) evaluation method for multifunctional mobile devices is suggested. The proposed method is based on the extraction of the transfer function between the component-level and the system-level radiated emissions. To demonstrate the practical correlation between the near-field emission from components or modules and far-field radiation from systems, measurement-based transfer functions are extracted by testing various mobile phones integrating camera modules as a target component. A specification for the component-level EMI evaluation is developed with a statistical transfer function and the system-level EMI regulation of CISPR. The proposed evaluation method is experimentally verified using 86 real mobile phones with a good correlation between the component-level and the system-level evaluation results.
Keywords :
mobile handsets; modules; radiofrequency interference; EMI; camera modules; component level electromagnetic interference; mobile devices components; mobile devices modules; mobile phones; multifunctional mobile device; radiated emission evaluation; system level radiated emission; Cameras; Correlation; Current measurement; Electromagnetic interference; Frequency measurement; Mobile handsets; Transfer functions; Component; electromagnetic interference (EMI) evaluation; mobile device; near-field emission; specification; system-level radiation; transfer function;
Journal_Title :
Electromagnetic Compatibility, IEEE Transactions on
DOI :
10.1109/TEMC.2014.2307915