Title

Analysis and Solution for RF Interference Caused by PMIC Noise in Mobile Platforms

Abstract

Display modules have become inextricable components in recent mobile platforms; however, displays also represent the most common noise sources contributing to radio-frequency interference (RFI) issues. This paper considers RFI issues caused by power management integrated circuits (PMIC) that support display modules in practical mobile devices. The noise coupling from PMIC outputs to a mobile antenna is analyzed based on electromagnetic simulations and measurements. An alternative and practical method to evaluate the noise coupling is then suggested on the basis of transfer impedances of display power lines. Finally, a practical solution using selected multi-layer ceramic capacitors to improve the RFI issues is proposed and experimentally validated.

Department(s)

Electrical and Computer Engineering

Keywords and Phrases

Power Management Integrated Circuit (PMIC); Radio-Frequency Interference (RFI); Transfer Impedance

International Standard Serial Number (ISSN)

0018-9375; 1558-187X

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2019 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

17 Jun 2019

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