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From: email@example.com (Bob Wilson)
Subject: Re: Tracker implant for children - Real or Fake?
Date: Sun, 08 Sep 2002 05:11:43 -0000
Organization: Your Organization
X-Newsreader: WinVN 0.99.9 (Released Version) (x86 32bit)
In article ,
>On 06 Sep 2002, reinier.I_HATE_SPAM.gerritsen@NO_SPAMchampionchip.nl
>(Reinier Gerritsen) said:
>> I don't believe this story. As far as I know, it is impossible to make
>> a GSM compatible transceiver and a battery and an antenna in such a
>> small volume. If I see the problems to be "ironed out", it cannot be
>> done in just a few months. *Maybe* you can fit it all in a tiny glass
>> tube, but the battery will be drained in a few hours at best.
>> Any comments?
>I was thinking the same things when I read the article. It doesn't seem
>technologically feasible at this point. Humans attenuate RF very well,
>so any implanted transmitter will require lots of power to be receivable
>at any significant distance.
The RF attenuation issue assumes that there is any signal to attenuate in
the first place. At any reasonable frequency (let's say 2GHz at the
maximum), the "antenna" in this thing is so electrically short, that its
radiation efficiency will be hopeless. It will need a LOT of RF power just
to get a reasonable signal level. Problems with body attenuation are trivial
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