GSM, UMTS ve LTE Baz İstasyonu Sinyallerinin Oluşturduğu Maruziyetin Frekans Seçici Ölçümleri ve Analizi

Öz

Günümüzde, elektromanyetik alanların sebep olduğu maruziyetin seviyesini ölçmek için yaygın olarak frekans seçici ölçüm yöntemi kullanılmaktadır. Ancak bu ölçümler uzmanlık gerektiren ve uygulamada farklı sonuçlar verebilen hassas ölçümlerdir. Bu nedenle, farklı GSM (Global System for Mobile Communication), UMTS (Universal Mobile Telecommunications System) ve LTE (Long Term Evolution) baz istasyonu antenlerinden gelen sinyallerin RF maruziyetinin hassas bir şekilde ve frekans seçici olarak ölçülmesi ve değerlendirilmesi gerekmektedir. Bu amaçla, frekans seçici ölçüm yöntemi kullanılarak Almanya/Regensburg’da bulunan elektromanyetik kirlilik ölçümleri konusunda uzman, referans bir laboratuvar ile TÜBİTAK Ulusal Metroloji Enstitüsü (UME), Elektromanyetik Laboratuvarı arasında karşılaştırma ölçümleri gerçekleştirilmiştir. Çalışma kapsamında ölçümler, Almanya/Bayreuth'da 4 farklı bölgede bulunan baz istasyonlarında, her bölgede 2 ölçüm noktası seçilerek eş zamanlı olarak gerçekleştirilmiş ve değerlendirilmiştir. Dört farklı konumda bulunan, 8 farklı ölçüm noktasındaki bağıl farkın 0 dB ile 1.4 dB arasında olduğu belirlenmiştir. Elde edilen karşılaştırma sonucu verileri incelendiğinde her iki ölçüm ekibi tarafından oluşturulan ölçüm sonuçlarının iyi bir uyum içinde olduğu görülmüştür.

Anahtar Kelimeler

• Elektromanyetik,Maruziyet,Frekans Seçici,Karşılaştırma,Ölçüm

Frequency Selective Measurements and Analysis of Exposure to GSM / UMTS / LTE Base Station Signals

Öz

Nowadays, the frequency selective measurement method is commonly used to measure the level of exposure caused by electromagnetic fields. However, these measurements are sensitive measurements that require expertise and can give different results in practice. For this reason, the RF exposure of the signals from different GSM (Global System for Mobile Communication), UMTS (Universal Mobile Telecommunications System) and LTE (Long Term Evolution) base station antennas needs to be measured sensitively as frequency selective and evaluated accurately. For this purpose, the comparison measurements were performed between the Electromagnetic Laboratory of TUBITAK National Metrology Institute (UME) and the reference laboratory, which are experts in electromagnetic pollution measurements situated in Germany/Regensburg by using frequency selective measurement method. Within the scope of study, the measurements were performed and evaluated simultaneously at 4 different locations of base stations in Bayreuth, Germany by selecting 2 measurement points in at each location. The relative difference in 8 different measuring points at the 4 different locations was determined to be between 0 dB and 1.4 dB. When the comparison result data were investigated, it was seen that the measurement results generated by both measurement teams were in good agreement.

Anahtar Kelimeler

• Electromagnetic,Exposure,Frequency Selective,Comparison,Measurement

Kaynakça

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