wrote:

A phased array requires precise phase (or frequency) control of the
emitters to do the beam forming and aiming.

The way most of the phased-array systems I have seen operate is that there
is a master clock which drives all of the individual transmitter modules,
and each of the modules receives a control signal for a phase modulator,
which shifts the output of that module by a preset amount. How this is
accomplished in each module varies a lot depending on the speed of control
required, the bandwidth required, and the size. When you have a few hundred
channels, shrinking each channel in size becomes critical.
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."