Magnus Danielson wrote:
The directional antenna needs to have their directional lobes towards
each sat being tracked. If you try put the nulls towards the jammers
then you need to have a fair knowledge of where it is. If you direct
the loop, the side-loobs needs to be sufficiently suppressed. A single
jammer and a fair idea of the heading will work, but it becomes
complex and in the end you need more and more antennas to handle more
jammers.
Ah...you really don't need any a prori knowledge of the location of a
jammer.
A little reading on adaptive antenna technology as applied to GPS will
throw light on my comment and is also some interesting reading. This
would be a starting point:
http://www.raytheon.com/businesses/stellent/groups/sas/documents/content/cms04_022900.pdf
Bruce, WB9ANQ
--
Bruce Rahn
Wisdom has two parts:
1. having a lot to say; and
2. not saying it!
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