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Old August 11th 08, 09:28 PM posted to rec.radio.amateur.antenna
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First recorded activity by RadioBanter: Nov 2006
Posts: 2,915
Default Blackberry power level 4.9GHz

You wrote:

...
Sonny, you seem to be using the Inverse, of the Inverse Square Law
here.... the Farther the source is from the receiver the LESS power
reaches the receiver, not MORE. It goes Down, by the SQUARE of the
distance, not up. You also don't get ALL of the 300 Milliwatts
going into your head as the antenna is semi Omni-directional and
only about 120 degrees of the 360 degree transmitted signal will
intersect with your head, and another maybe 10 degrees with you hand.
Better go back and do the Sums, AGAIN, or leave it to folks that
passed Jr. High School Math, and High School Physics.


Or, to simplify, once again, 300mw@6mm ~= ... re-read my
posts, you (that is your "name", right? grin) missed it!

However, I have rethought those distances, since, I now realize the
antenna in the phone is much closer to my skull than I had first
thought; here is the "new breakdown":

3mm@300mw =
=
=
=
=
=

19.2cm ~= ~7.5-inches

Anyway, point is, when I use my cell phone without a headset, that spot
on my head, directly under the cell phones' antenna, is getting the same
exposure as it would get from a 1.2288KW source utilizing the same
antenna, and at a distance of 7.5 to ~15 inches from my head! (realize
the importance of that 19.2cm/7.5-inch vs. 1.2288KW figure!)

Anyway you cut that--it ain't pretty! My wife, frequently, makes 2+ hr
calls to family! Did that help?

Now, anyone want to explain the "yellow journalism" in that to me?

Regards,
JS
 
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