Wideband Noise Measurement Technique in Duplex Systems for RF Interference

Chulsoon Hwang; David Pommerenke; Jun Fan; Takashi Enomoto; Junji Maeshima; Kenji Araki

doi:10.1109/TEMC.2017.2782673

Wideband Noise Measurement Technique in Duplex Systems for RF Interference

Chulsoon Hwang^*, David Pommerenke, Jun Fan, Takashi Enomoto, Junji Maeshima, Kenji Araki

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

A wideband noise measurement technique with improved isolation is demonstrated for a practical mobile phone. The liquid crystal display (LCD) baseband noise modulated with a transmitted radio frequency (RF) signal interferes with the received RF signal, resulting in an RF desensitization problem. A wideband and simple measurement setup based on a 180° hybrid coupler is proposed and demonstrated to characterize the modulation and its coupling behaviors in duplex systems. This setup overcomes the frequency limitation of a duplexer-based measurement setting. In addition, signal-to-noise ratio improvement in the proposed measurement technique is quantitatively analyzed.

Original language	English
Pages (from-to)	1038-1044
Number of pages	7
Journal	IEEE Transactions on Electromagnetic Compatibility
Volume	60
Issue number	4
DOIs	https://doi.org/10.1109/TEMC.2017.2782673
Publication status	Published - 1 Aug 2018
Externally published	Yes

Keywords

Electromagnetic interference
liquid crystal display (LCD)
mobile phone
modulation
radio frequency (RF) interference

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1109/TEMC.2017.2782673

Cite this

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title = "Wideband Noise Measurement Technique in Duplex Systems for RF Interference",

abstract = "A wideband noise measurement technique with improved isolation is demonstrated for a practical mobile phone. The liquid crystal display (LCD) baseband noise modulated with a transmitted radio frequency (RF) signal interferes with the received RF signal, resulting in an RF desensitization problem. A wideband and simple measurement setup based on a 180° hybrid coupler is proposed and demonstrated to characterize the modulation and its coupling behaviors in duplex systems. This setup overcomes the frequency limitation of a duplexer-based measurement setting. In addition, signal-to-noise ratio improvement in the proposed measurement technique is quantitatively analyzed.",

keywords = "Electromagnetic interference, liquid crystal display (LCD), mobile phone, modulation, radio frequency (RF) interference",

author = "Chulsoon Hwang and David Pommerenke and Jun Fan and Takashi Enomoto and Junji Maeshima and Kenji Araki",

year = "2018",

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doi = "10.1109/TEMC.2017.2782673",

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AU - Hwang, Chulsoon

AU - Pommerenke, David

AU - Fan, Jun

AU - Enomoto, Takashi

AU - Maeshima, Junji

AU - Araki, Kenji

PY - 2018/8/1

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N2 - A wideband noise measurement technique with improved isolation is demonstrated for a practical mobile phone. The liquid crystal display (LCD) baseband noise modulated with a transmitted radio frequency (RF) signal interferes with the received RF signal, resulting in an RF desensitization problem. A wideband and simple measurement setup based on a 180° hybrid coupler is proposed and demonstrated to characterize the modulation and its coupling behaviors in duplex systems. This setup overcomes the frequency limitation of a duplexer-based measurement setting. In addition, signal-to-noise ratio improvement in the proposed measurement technique is quantitatively analyzed.

AB - A wideband noise measurement technique with improved isolation is demonstrated for a practical mobile phone. The liquid crystal display (LCD) baseband noise modulated with a transmitted radio frequency (RF) signal interferes with the received RF signal, resulting in an RF desensitization problem. A wideband and simple measurement setup based on a 180° hybrid coupler is proposed and demonstrated to characterize the modulation and its coupling behaviors in duplex systems. This setup overcomes the frequency limitation of a duplexer-based measurement setting. In addition, signal-to-noise ratio improvement in the proposed measurement technique is quantitatively analyzed.

KW - Electromagnetic interference

KW - liquid crystal display (LCD)

KW - mobile phone

KW - modulation

KW - radio frequency (RF) interference

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Wideband Noise Measurement Technique in Duplex Systems for RF Interference

Abstract

Keywords

ASJC Scopus subject areas

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