Cell phones that work, SAR data

12 Sep

I came across this site where it lists cell phone make and model, followed by a radiation rating.

http://www.ewg.org/cellphoneradiation/Get-a-Safer-Phone?allavailable=1

With all things being equal, the higher the SAR, the higher the probability the phone will work… alas, if the reciever circuits are right on the money, they can make up for a lack of transmit power, same deal with different modes of operation, and a number of other factors. By the same token, higher SAR levels, all things being equal also equate to reduced battery life. That being said, its rare indeed for money to be spent to optimize reception, or battery life, especially in the commodity realm.

I’m a believer that if the RF field is strong enough to feel warm, its not safe, same deal if one is seeing sparks flying. For levels less than such, it may or may not be. For the paltry legal limit of 1.6W/kg in the US, egads… if folks only knew the levels of fields they were really exposed too…. but then again, some folks are paranoid. Thus for me, the higher the SAR figures, the better.. 

 

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2 Responses to “Cell phones that work, SAR data”

  1. jmhannon September 12, 2009 at 5:24 pm #

    Since cell phones talk to towers not other cell phones I am having trouble understanding how a good receiver compensates for low transmit erp. I thought that cell phones negotiated their power output with the tower. I wonder if the SAR measurement is for max power or typical.

  2. Anonymous September 12, 2009 at 7:00 pm #

    In marginal cases, the receive section plays a significant role. You may not necessarily be able to make a call, but can get voice mail notifications and other status updates… at least on the modules I’ve worked with.And yes, you are correct, cell phones do negotiate with the tower, and thus it keeps exposure low, but more importantly limits signal spread and increases battery life. Here is a link to an overview of SAR testinghttp://www.emctech.com.au/sar/SAR_Article_2003.pdf

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