EM Kirlilik Ölçümü İçin Geniş Bant ve Frekans-Seçici Ölçümlerin Karşılaştırılması

Yıl 2017, Cilt: 7 Sayı: 14, 5 - 12, 31.12.2017

Cafer Bahadır Tektaş Muhammed Hasan Aslan

Öz

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

Öz

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.

Anahtar Kelimeler

Broadband, Electromagnetic, Frequency-Selective, Measurement, Pollution

Kaynakça

• [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