is there any long term health risk from a 12 meter high mobile phone antenna on building across my street ?

Answer 1

Actually, you have given enough information to calculate the amount of power that will reach you. The formular for Free Space Loss = 20 log d + 20 log f -147.55, where d is distance in meters and f is frequency in Hertz. Cell phones work at both 800 MHz and 1900 MHz in the US. So this comes to ~50dB for 800 MHz and ~60dB for 1900 MHz.

Normal cell tower (if it is fully loaded with all the carriers) will have 7 emitters, i.e. 2 for Verizon, 2 for Sprint, 2 for AT&T and 1 for Nextel. Using 200 W for each emitter will come to 1.4 kW of emission. Using the 50 dB attenuation will result in 1,400/100,000 W will reach you. This is about 10 mW or similar to Bluetooth power range. So let's compare this to a regular cell phone. US standard for handheld is 600 mW (Europe is using 1000 mW).

I guess, if some kids are willing to put 600 mW of microwave power right up against their heads for hours at a time, then it should be OK right? Then again, I think the kids are frying their brains for sure. Keep in mind that a microwave oven works at 1000 times the power and no one would ever consider sticking their head in a microwave oven for even a millisecond. But that's exactly what they are doing with a cellphone.

As far as the long term effect. It is up to you. If you think that wearing a Bluetooth headset all day long is OK (10 mW) then being 12 meters away from a cell tower should have about the same effect.

Answer 2

Even if you believe some of the studies that show some sort of link between cell-phone RF energy and diseases (which I don't believe anyway because they haven't been substantiated to any degree). Being over 20 meters away from the tower puts you in the far-field of the radiating pattern (for the frequencies used) of the antennae. You get more energy applied to your head from a friend's cell phone standing 3 feet away (or from your own cell phone, of course) than you do from that tower across the street.

There's nothing to worry about.

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Answer 3

If it is 12 meters high and less than 12 meters away therre might be a risk of it falling on you.

But other than that, no. The radio waves sent by the tower have not been shown to have any health effects on people.

Answer 4

not much more than using a cell phone, it only produces a few watts of power to cover an area just overlapping to the next closest tower
the reason it is 12 meters is not only to give it a good range but also to keep it a safe distance from nearly anything

Answer 5

No u would get more radiation from the local TV station . The wattage is normal about 50 to 100 watts and by the times it goes a very short distance it has been attenuated about 100dB.

Answer 6

I've heard there are more alien abductions near those towers.