International Journal of Applied Mathematics Electronics and Computers 2147-8228 2147-8228 PLUSBASE AKADEMİ ORGANİZASYON VE DANIŞMANLIK Engineering Mühendislik Measurement and Comparison of Signal Levels of GSM900, GSM1800 and UMTS Bands Cansız Mustafa DİCLE ÜNİVERSİTESİ Abbasov Teymuraz INONU UNIV Kurt M.Bahattin DİCLE ÜNİVERSİTESİ Celık A.Recai DİCLE ÜNİVERSİTESİ 12 01 2016 Special Issue-1 142 144 11 24 2016 12 01 2016 Copyright © 2013, International Journal of Applied Mathematics Electronics and Computers 2013 International Journal of Applied Mathematics Electronics and Computers

Signal levels of GSM900, GSM1800 and UMTS bands were measured as mobileon the main streets in the city center of Diyarbakır at the same time and routeduring a week. The measurements were performed by using high precision andportable spectrum analyzer with an isotropic electric field antenna and alaptop. The high precision spectrum analyzer is a device that measures the highfrequency electromagnetic fields. The isotropic electric field antenna allows athree axis measurements. The laptop was used to record and analyze themeasurement samples. Electric field strengths were measured as signal levels inthis study. Some statistical parameters such as standard deviation and variancewere calculated with 95% confidence interval for measurement samples. Thehighest signal levels were measured as 3.8580 V/m for GSM 900 band, 2.9440 V/mfor GSM1800 band and 6.0900 V/m for UMTS band during a week. Similarly, meanelectric field strength values as average signal levels were calculated as0.4985 V/m for GSM 900 band, 0.2350 V/m for GSM1800 band and 0.6281 V/m forUMTS band. According to the mean electric field strength values, the averagesignal levels of three bands were ranked as UMTS, GSM900 and GSM1800 from thelargest to the smallest, respectively. The highest variation in standarddeviation and variance was observed on Wednesday for GSM900 and UMTS bands andThursday for GSM1800 band.

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