At 09:40 21/11/01 Wednesday +0000, you wrote:
On Tue, 20 Nov 2001 11:13:53 +0000, you wrote:
>As for getting "beams", if you add together a lot of antennas on a long
>baseline (tens of kilometres) whether for Tx or Rx you will get what
>superficially look like multiple narrow "beams" with very deep (40-50 dB)
>nulls between them. The longer the baseline or the more antennas you use
>the more "beams" and nulls you will get. In fact, an interferometer. The
>problem is that the "gain" in any one beam is miniscule, perhaps 0.5
>dB.
Would the steerable attenuation be more useful for nulling out
interference than
the gain itself?
Nick
Hi Nick,
In theory, yes, but there are multiple nulls of varying depth and you
probably don't know which direction they're in.. Accurate phase shifting to
do it is a problem, also. Much easier to use a loop!
Walter G3JKV.
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