On Jul 1, 7:24 am, wrote in
http://groups.google.com/group/sci.e...0c8ed13?hl=en&
:

how would u like to change the cell phone industry?

Analog cells phones should stop using FM and should start using AM
with SHF frequencies - at least 3 GHz and at most 30 GHz.

http://en.wikipedia.org/wiki/Super_high_frequency

I choose SHF frequencies because SHF seems to be the sweet spot
between frequencies that are high-enough to rip through charged
particles & provide large amounts of bandwidth, yet low-enough to be
wireless and long-distance. At EHF and above, it starts to get into
the IR range where long-distance wireless reception is not possible
and atmospheric opacity begins to dominate.

Equally important, SHF frequencies can efficiently transmit signals
using extremely small transmitters. Longer wavelengths require larger
transmitters.

Obviously there are frequencies lower than SHF -- VHF and above --
that can easily penetrate charged particles [e.g. anything resembling
the ionosphere or heliosphere]. However, lower-frequencies tend to
result in less bandwidth, so it is better to use higher-frequencies
when the application requires significant bandwidth.

I choose AM because it requires less bandwidth than FM. In addition,
AM tends to retain reception of rather weak signals, while FM
"considers" such signals to be absent.