"Richard Harrison" wrote in message
...
As azimuths between phones and bases are constantly changing,
concentrating phone energy at a articular azimuth does not make sense if
the phone is moving.

There's a lot of research going on for 'smart' antennas that effectively are
just electronically phased arrays that continuously re-tune themselves to
'lock on' to a base station. Neat idea, with the usual benefits of
potentially less power for a given range, better range for a given power,
etc., but I don't know whether or not any commercial phones employ the idea
yet.