Tuesday, 28 August 2012

Mobile base-station radiation limit

The issue of mobile tower radiations causing cancer has been a cause for concern to people across the country. There is a common perception that there is radiation from mobile towers. In reality, radiation is emitted from base stations atop mobile towers and is called radio frequency field (base station emissions). 

The International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines of April 1998 say that epidemiological studies have shown no major health effects associated with typical exposure environments. 

The Department of Telecommunications adopted the International Electric and Magnetic Field (EMF) norms in 2008 in respect of mobile towers prescribed by the ICNIRP. But in August 2012, the Union government has told Parliament that the exposure limit of radio frequency fields (base station emissions) will be brought down to one-tenth of the existing level from September 1.

In India, GSM services are being operated at 900 MHz and 1800 MHz frequency band as well as 2100 MHz. For 900 MHz, the permissible power density is 4.5 W/Sqm. In the case of 1800 MHz and 2100 MHz, it is 9 W/Sqm and 10.5 W/Sqm respectively.

Please read http://hyd-n-spook.blogspot.in/2012/02/specific-absorption-rate-sar.html to know about the Specific Absorption Rate which is the frequency energy absorbed by body when using mobile phone.

1 comment:

  1. Picocell and Femtocell are also important as they are suggested as a solution to large towers...