title: The vertical pattern of microwave radiation around BTS (Base Transceiver Station) antennae in Hashtgerd township.
abstract: New environmental pollutants interfere with the environment and human life along with technology development. One of these pollutants is electromagnetic field. This study determines the vertical microwave radiation pattern of different types of Base Transceiver Station (BTS) antennae in the Hashtgerd city as the capital of Savojbolagh County, Alborz Province of Iran. The basic data including the geographical location of the BTS antennae in the city, brand, operator type, installation and its height was collected from radio communication office, and then the measurements were carried out according to IEEE STD 95. 1 by the SPECTRAN 4060. The statistical analyses were carried out by SPSS16 using Kolmogorov Smirnov test and multiple regression method. Results indicated that in both operators of Irancell and Hamrah-e-Aval (First Operator), the power density rose with an increase in measurement height or decrease in the vertical distance of broadcaster antenna. With mix model test, a significant statistical relationship was observed between measurement height and the average power density in both types of the operators. With increasing measuring height, power density increased in both operators. The study showed installing antennae in a crowded area needs more care because of higher radiation emission. More rigid surfaces and mobile users are two important factors in crowded area that can increase wave density and hence raise public microwave exposure.
authors.forename: Simin
authors.initials: S
authors.lastname: Nasseri
authors.forename: Mohammadreza
authors.initials: M
authors.lastname: Monazzam
authors.affiliation: Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran. beheshti_meisam@yahoo.com.
authors.forename: Meisam
authors.initials: M
authors.lastname: Beheshti
authors.forename: Sajad
authors.initials: S
authors.lastname: Zare
authors.forename: Amirhosein
authors.initials: A
authors.lastname: Mahvi