I came across a reference about adaptive beamforming in the ARRL
Handbook. The reference was from QEX which I don't yet subscribe to.

Anyone care to explain/discuss this neat concept?

John
AB8WH

well, 'adaptive beamforming' is two words...

'beamforming' means forming a directional 'beam' using an antenna. be it a
simple parasitic array like yagi's or a complex array of driven elements
like a flat panel radar. most often when you talk about beamforming it is
more like the radar arrays or other large array that combines signals from
many small antennas to form a very directional beam.

'adaptive' means forming the beam in a way that makes it work better in the
environment, or adapt to it's surroundings. this is often used to form
beams to maximize a received signal while notching out interference. so you
use an algorithm to measure s/n ratio or some other parameter and adjust
power and phasing of the individual elements to get the best signal you can.
its harder to adapt a transmitting antenna since you need some kind of
feedback from the far end to let you know if the beam is getting better or
worse as you adjust it.


"john" wrote in message
...
I came across a reference about adaptive beamforming in the ARRL Handbook.
The reference was from QEX which I don't yet subscribe to.

Anyone care to explain/discuss this neat concept?

John
AB8WH