Thread: TETRA issues
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Old July 2nd 03, 08:08 AM
harrogate
 
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Default TETRA issues


"Pellucid" wrote in message
...
Yes, though not very directional (about 2.5dB's of directional gain)
.
Diphthong wrote in message
om...

Are four stack folded dipoles close to a mast
really directional enough to be used in sectors?

The signal strengths were pretty much indentical in most
directions around the sites



Beg to differ. A single sided four-stack projects a response somewhat like a
flat-backed cardiod and will have an overall gain of about 9dB. The
effective coverage is almost +/- 90deg of the pointed direction.

If they want directionality the only option is either a yagi with 3 or more
elements, or a corner refelector.

Generally speaking you need to be some distance from the antenna before you
can see the effects of the directionality.


--
Woody