"JIMMIE" wrote in message
ups.com...
On Apr 21, 8:40 pm, "Dave (from the UK)" see-my-
wrote:
JIMMIE wrote:
This sounds very much like an arrangement for a radar antenna that
operates a little above 1Ghz with 32 dipole assemblies space out over
approximately 10 meters. The far field is eatablished at about 2km on
this antenna.

Jimmie

No, it is not that at all, but if you have a reference to the antenna
you describe, I would be interested. This is wider and a higher
frequency.

--
Dave (from the UK)

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The antenna I was refering to is knon as an ATCRBS antenna or an SSR
antenna. I coouldnt find a lot of info right off but there were a lot
of references t oIEEE xplorer. If you belong to that Im sure you can
find some information.

Like chess? send me an email and I will connect you will a friend who
has been known to give a challenging game or two.

Jimmie



The antenna I discred has a gain of about 20 Dbd and the far field doesnt
form up at 2Km like I said. Monitoring devices shuold be at least 2km awy to
make sure they are in the far field so my guess would be about 1/2 that
distance.