[opendtv] Re: News: FCC Floats Cash-For-TV-Spectrum Scheme
- From: "Manfredi, Albert E" <albert.e.manfredi@xxxxxxxxxx>
- To: "opendtv@xxxxxxxxxxxxx" <opendtv@xxxxxxxxxxxxx>
- Date: Fri, 30 Oct 2009 15:25:22 -0500
Craig Birkmaier wrote:
>> And third, the RF energy density impinging on humans using
>> these handheld two-way devices far exceeds the energy density
>> created by the broadcast stations. So by anything resembling
>> logic, the proliferation of ever broad-er-band RF handheld
>> devices can hardly be considered "green."
>
> Once again wrong.
>
> The RF energy density is far more uniform and at lower power
> levels that the big sticks.
Are you kidding me?
The power density impinging on people using hand-held phones, with transmitter
inches from their bodies, is much greater than big sticks create, unless you're
very close to the big stick.
> You must look at the energy density of a big stick based on
> distance from that stick.
So do so, Craig. Give me numbers.
The big stick is 1 MW, transmitting at 600 MHz.
The hand-held is 100 mW, also at 600 MHz.
The big stick is 1 Km away, i.e. very close for a big stick, and the hand-held
is 5 cm away.
The power received by a receive antenna at your location from the big stick is
+2 dBm. Increase the distance to the big stick to 2 Km, and the power at the
receive antenna is -4 dBm.
The power received from the handheld is +18 dBm!
See the difference? What kind of silly hype would pretend that hand-held
devices are green?
Bert
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