NDLI: Computations of the effects of wind turbines in the close near field of RF installations

Content Provider	IEEE Xplore Digital Library
Author	Van Lil, E. De Bleser, J. Van de Capelle, A.
Copyright Year	2011
Description	Author affiliation: K.U.Leuven, div. ESAT-Telemic, Kasteelpark Arenberg, 10; Bus 2444; B-3001 Heverlee; Belgium (Van Lil, E.) \|\| Katholieke Universiteit Leuven, Belgium (De Bleser, J.; Van de Capelle, A.)
Abstract	The principal effects that have been investigated are the attenuation due to shadowing and the occurrence of false echoes in a radar system. For a communication system, the attenuation due to the presence of the turbine and the modulation due to the movement of the blades and nacelle have been investigated. Some agencies (most Air Navigation Service Providers, for instance) require very large distances to be maintained from their installations, to allow them to follow all air traffic clearly. For special applications however, it is possible to install turbines much closer to the RF installations than one might expect from general rules. The first aspect that has to be noted is that the near-field radar cross section (RCS) [1] of a turbine is much smaller than the far-field formulas [2]. Indeed, the far-field of a turbine is only reached when the turbine is out of view of the installations due to the curvature of the earth. So, the interaction with the turbine happens in the Fresnel zone of the turbine. Approximated formulas for turbines in the far-field of the RF system have already been published in [3]. In this paper, we will investigate a turbine which is even closer namely in the Fresnel zone of an RF system antenna, which has not yet been investigated up to now.
Starting Page	1362
Ending Page	1366
File Size	1565737
Page Count	5
File Format	PDF
ISBN	9781457702501
e-ISBN	9788882020743
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-04-11
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	EurAAP
Subject Keyword	Radio frequency Radar cross section Blades Radar antennas Wind turbines Shadow mapping
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
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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