Title

LCD Baseband Noise Modulation Estimation for Radio Frequency Interference in Mobile Phones

Abstract

A method to predict the modulated noise coupling to an antenna is proposed and experimentally validated using a practical mobile phone. The baseband noise of a liquid crystal display (LCD) is modulated with the Tx carrier signal of cellular communication, resulting in a radio frequency desensitization problem. The modulation mechanism is understood and its circuit representation is proposed to estimate the modulated noise coupling to an antenna. The modulation coefficient, which represents a relationship between the coupled voltage and modulated current, is experimentally extracted from a stand-alone LCD panel. The proposed modulation model is successfully validated through comparison with measurements using a practical mobile phone.

Meeting Name

2017 Asia-Pacific International Symposium on Electromagnetic Compatibility, APEMC 2017 (2017: Jun. 20-23, Seoul, South Korea)

Department(s)

Electrical and Computer Engineering

Research Center/Lab(s)

Electromagnetic Compatibility (EMC) Laboratory

Comments

This paper is based upon work supported partially by the National Science Foundation under Grant No. IIP-1440110.

Keywords and Phrases

LCD; Mobile Phone; Modulation; Radio Frequency Interference; RFI

International Standard Book Number (ISBN)

978-153863912-2

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2017 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

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