NDLI: Ambient Power Density and Electric Field From Broadband Wireless Emissions in a Reverberant Space

Content Provider	IEEE Xplore Digital Library
Author	Tait, G.B. Hager IV, C.E. Baseler, T.T. Slocum, M.B.
Copyright Year	1964
Abstract	With broadband wireless communications networks currently being deployed in ships, aircraft, and other confined, reflective structures, it is necessary to assess the electromagnetic environment (EME) created by these radio-frequency emissions in a reverberant space. The resultant ambient power density and electric field may be identified as a cause of electromagnetic interference to co-located electronic equipment. In this study, we measure and characterize the EME created by emissions from a broadband IEEE 802.11n wireless local area network (WLAN) in a reverberation chamber mock-up of a shipboard below-deck space. The interaction between the wide-bandwidth power spectral density of the communications signal and the highly frequency-selective channel of the reverberant space leads to average ambient power density and average ambient electric field that exhibit very small spatial variation. This spatial uniformity in average field results from integration of the received signal power spectral density across the wide frequency bandwidth. The peak-to-average power ratio (PAPR) of the received wireless signal is derived from time-dependent power waveform statistics measured by a real-time spectrum analyzer. A maximum electric field is computed from the peak received power. Previously, the maximum electric field was assessed using continuous-wave (CW) signal transmission and mechanical mode stirring in the reverberant space. For a given total power radiated into the space, it is shown that maximum electric fields obtained from these two approaches are in good agreement.
Sponsorship	IEEE Electromagnetic Compatibility Society
Starting Page	307
Ending Page	313
Page Count	7
File Size	902421
File Format	PDF
ISSN	00189375
Volume Number	58
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2016-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Bandwidth OFDM Broadband communication Wireless communication Broadband antennas Tuners Reverberation chambers reverberation chamber Broadband wireless emissions electromagnetic environment
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering

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3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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