IEIE Transactions on Smart Processing and Computing

The Institute of Electronics and Information Engineers (대한전자공학회)
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Near-field Noise-emission Modeling for Monitoring Multimedia Operations in Mobile Devices

  • Song, Eakhwan (Department of Electronics and Communications Engineering, Kwangwoon University) ;
  • Choi, Jieun (National Security Research Institute) ;
  • Lee, Young-Jun (National Security Research Institute)
  • Received : 2016.12.06
  • Accepted : 2016.12.13
  • Published : 2016.12.30
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Abstract

In this paper, an equivalent circuit model for near-field noise emission is proposed to implement a multimedia operation-monitoring system for mobile devices. The proposed model includes a magnetic field probe that captures noise emissions from multimedia components, and a transfer function for near-field noise coupling from a transmission line source to a magnetic field probe. The proposed model was empirically verified with transfer function measurements of near-field noise emissions from 10 kHz to 500 MHz. With the proposed model, a magnetic field probe was optimally designed for noise measurement on a camera module and an audio codec in a mobile device. It was demonstrated that the probe successfully captured the near-field noise emissions, depending on the operating conditions of the multimedia components, with enhanced sensitivity from a conventional reference probe.

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