From: "Jonathan Johnson" <jonathan@OUTEREDGE.NET>
Subject: [EE]: material penetration for rf spectrum


>Can anyone point towards something on the web that will give me the
different penetration ratings of varying wavelengths/ frequencies?

After a few seconds of yahoo-ing for "radar" "attenuation" I got:
http://www.georentals.co.uk/gprsee.htm

You might also look into searching for cell phone radiation absorption, I
have seen a few papers on that. Your brain is basicaly salt water and
absorbs about half (3db) of the energy from your cell phone.

>Would I get the RF penetration needed with the 173Mhz or 151?Mhz bands? or
even 433?

Probably with an H-mode rather then E-mode antenna.

Scott

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