You could probably look up references if you care but the=20
distinction between near-field and radiation fields is
real. An inductor can create oscillating fields
without energy loss ( unless someone is actually receiving)
but a radiation field is a loss to the transmitter
even if no one is there to receive. And, their spatial
dependencies are different- inductive fields
fall off more quickly than 1/r( hence term "near field").
I didn't look into the specific claims
for the technology cited in the link.
> -----Original Message-----
> From: Nick May [mailto:nick@kyushu.com]
> Sent: Saturday, September 20, 2003 10:54 AM
> To: keitai-l@appelsiini.net
> Subject: (keitai-l) magnetic induction as bluetooth replacement
>=20
>=20
>=20
> The kind of thing you might reject as snake-oil at first sight....
>=20
> The company involved is said to have got the kit for sending signals =20
> using magnetic induction into a small chip...
>=20
> news.com takes it seriously....
> http://news.com.com/2100-1039_3-5079564.html
>=20
> slashdot is full of bad jokes...
> http://science.slashdot.org/article.pl?sid=3D03/09/20/=20
> 1343257&mode=3Dflat&tid=3D126&tid=3D137&tid=3D193
>=20
> It is claimed that this tech could replace bluetooth in phone (for =20
> example). It is said to be low power, not prone to interference, and =20
> have other advantages.
>=20
> Nick
>=20
>=20
> This mail was sent to address mmarchywka@eyewonder.com
> Need archives? How to unsubscribe?=20
http://www.appelsiini.net/keitai-l/=20
Received on Sat Sep 20 18:06:04 2003