EM Kirlilik Ölçümü İçin Geniş Bant ve Frekans-Seçici Ölçümlerin Karşılaştırılması
Baz istasyonları, TV vericileri, kablosuz cihazlar gibi aktif antenlerin sayısı arttıkça insanlar elektromanyetik maruziyetten ve sağlıklarından giderek daha fazla endişe etmeye başlamıştır. Bunun bir sonucu olarak, maruz kalınan elektromanyetik maruziyet seviyesinin ölçülmesi gerekli hale gelmiştir. EM kirliliğinin maruziyet düzeyini ölçmek için kullanılan, geniş bant ve frekans seçici diğer adıyla dar bant olmak üzere iki yaygın ölçüm yöntemi vardır. Bu çalışmada, frekans seçici ölçümleri gerçekleştirebilen ve sonucunda güçleri toplayıp toplam maruz kalma seviyesini hesaplayabilen bir yazılım çözümü geliştirdik. Daha sonra, bir elektromanyetik alan probu ile elde edilen geniş bant ölçüm sonuçları ile bir spektrum analizörü ve bir mini-bikonik anten kullanarak gerçekleştirilen frekans seçici ölçüm yöntemi ile elden edilen sonuçları arasında iyi bir karşılaştırma yapılmıştır.
Anahtar Kelimeler:
Geniş bant, Elektromanyetik, Frekans-Seçici, Ölçüm, Kirlilik
Comparison Between Broadband and Frequency-Selective Measurements for EM Pollution Survey
As the number of radiators such as base stations, TV transmitters, wireless devices increases, people are getting more and more concerned about the exposure and their health. As a result, it has become necessary to measure the level of electromagnetic exposure that is being exposed. There are two common methods to measure the exposure level of EM pollution; broadband and frequency selective, alias narrow-band, measurement methods. In this work, we developed a software solution that can perform frequency-selective measurements and finally can collect the powers and calculate the total exposure level. Thereafter, we made a good comparison between broadband measurement results obtained with a field probe and frequency-selective ones which are obtained by using a spectrum analyzer and a mini-biconical antenna.
Keywords:
Broadband, Electromagnetic, Frequency-Selective, Measurement, Pollution,
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- [1] T.G. Cooper, S.M. Mann, M. Khalid, R.P. Blackwell, “Exposure of the General Public to Radio Waves near Microcell and Picocell Base Stations for Mobile Telecommunications”, NRPB-W62, 2004 Online: http://www.infocell.org/imgs/uploads/research/NRPB_W62_Sep2004.pdf
- [2] Wolfgang Müllner, Georg Neubauer, Harald Haider , “ADD3D, A New Technique For Precise Power Flux Density Measurements At Mobile Communications Base Stations” Online: https://rf.seibersdorf-laboratories.at/fileadmin/uploads/intranet/dateien/2000_add3d_new_technique.pdf
- [3] “A Guide to power Flux Density and Field Strength Measurement”, NPL, UK, 2004 Online: http://www.npl.co.uk/publications/a-guide-to-power-flux-density-and-field-strength-measurement.
- [4] “GSM measurements witeh the Selective Radiation Meter SRM-3000”, 2007 Online: http://www.gruppompb.com/support/manuals/narda_srm_application_note.pdf
- [5] http://www.techmind.org/gsm/
- [6] Prof. Dr.-Ing. M. Wuschek, “Frequency Selective Measurements of Human Exposure to RF Electromagnetics Fields” Training Document, Part 5, 6
- [7] T.G.Cooper, S.M. Mann, M. Khalid, R.P. Blackwell, “Exposure of the General Public to Radio Waves near Microcell and Picocell Base Stations for Mobile Communications” Online:http://www.infocell.org/imgs/uploads/research/NRPB_W62_Sep2004.pdf
- [8] S.M. Mann, T.G.Cooper, S.G. Allen, “Exposure to Radio Waves near Mobile Phone Base Stations”, May 2000 Online: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.472.7687&rep=rep1&type=pdf
- [9] A.H. Al-Otaibi, D. Al-Ajmi, T. Williams, D. McGee, J.A. Dennis and M.U. Beg, “Monitoring of Electromagnetic Radiation from Cellular Base Stations in Kuwait”, Radiation Protection Dosimetry Volume 80, Issue 4, pp.397-404
- [10] G. Neubauer, K. Lamedschwandner, S. Cecil, G.Schmid, “Exposure Assessment Methods for Emerging New Technologies” Online: http://www.ursi.org/proceedings/procGA08/papers/KAEp7.pdf
- [11] T.G Cooper, S.M Mann, M. Khalid, R.P Blackwell, “Public exposure to radio waves near GSM microcell and picocell base stations”, J. Radiol Prot. 2006 Jun;26(2):199-211, 2006 May 26
- [12] Christof Olivier, Luc Martens, “Measurement And Processing Techniques For The Exposure Assessment Of Electromagnetic Fields Of Base Stations Using Spread-Spectrum Modulation” Online: http://www.ursi.org/proceedings/procGA05/pdf/KAE.2(01170).pdf
- [13] Craig W. Fanning, “Evaluating Cell Phone and Personal Communications Equipment and their EMC Effects on Automotive Audio and In-Cabin Modules” Online: Evaluating Cell Phone and Personal Communications Equipment and their EMC Effects on Automotive Audio and In-Cabin Modules
- ISSN: 1309-5501
- Yayın Aralığı: Yılda 2 Sayı
- Başlangıç: 2011
- Yayıncı: -