Telephone Masts
Following on from a recent post about the "Dangers" of Telephone radiation ....
http://www.gulf-times.com/site/topics/article.asp?cu_no=2&item_no=276528...
Radiation from Qtel towers ‘well within limit’
By Bonnie James
The Radio Frequency radiation from Qtel deployed wireless networks covering the length and breadth of Qatar is far below the international guidelines.
The finding is from a study conducted by Qatar University’s Electrical Engineering Department in co-operation with Qtel, the country’s first telecom service provider.
Electric field strength and power density measurements at 237 locations revealed that the values varied between 325 and 22 times below the Institute of Electrical and Electronics Engineers investigation level (IEEE).
The levels also were between 300 and 20 times below those permitted by the International Commission on Non-Ionising Radiation Protection (ICNIRP) for exposure to the general public.
“The maximum value of the measured electric field intensity at any location in Qatar was found to be far below the international guidelines,” according to Arakiyat bulletin of Qatar University’s Environmental Studies Center.
The study had three objectives. The first was to measure maximum and minimum levels and long term average values of Radio Frequency (RF) radiation levels.
If the second goal was to locate hot spots with highest electric field strengths by mapping RF radiation levels throughout Qatar, the third one was to establish a scientific database.
The study was planned over three stages to measure electric field strength and power density. The initial stage covered 85 locations in the inner Doha border after dividing the area into 1x1km grid. The second stage featured 87 locations at outer Doha border with the area divided into 3x3km grid, while the final stage covered 65 locations within rest of Qatar.
Spectral measurements were obtained over the 75MHz to 3GHz range at about 200 of the locations so that the total exposure to radio signals could be assessed.
Values were compared with the RF exposure limits set by IEEE and ICNIRP and several countries. Typical electric field strength measurements found were in the range of 0.20–3.0 volts per metre.
