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Jimbo2010 · 22-09-2010, 04:27

Anyone have experience with these smaller domes?

I was looking at the Si-Tex it's only 12" in dia.

Any other brands that are small?

foggysail · 22-09-2010, 06:18

It depends on how you want to use the radar and what you expect. The problem with small arrays is the beam width. A wide radiated beam cannot discriminate close targets.

Foggy

Jimbo2010 · 22-09-2010, 07:04

Can you elaborate on that?

**GordMay** · 22-09-2010, 07:19

Radar beamwidth varies inversely with antenna (Radome) size.

cfarrar · 22-09-2010, 08:22

As already stated, the real advantage of larger antenna is proportionally narrower beamwidth and better target resolution. Larger radomes typically have more power, too. However, the radar wave's amplitude decreases proportional to the square of the distance to the target, so while doubling your power is somewhat helpful with range, rain clutter, and so forth, it does not double your performance in these areas.

**Adelie** · 22-09-2010, 16:56

Quote:

Originally Posted by foggysail

The problem with small arrays is the beam width. A wide radiated beam cannot discriminate close targets.

Foggy

More specifically targets that are close to each other, not targets that are close to you.

foggysail · 22-09-2010, 17:15

Quote:

Originally Posted by Adelie

More specifically targets that are close to each other, not targets that are close to you.

Of course. I was half awake this morning plus I was in a hurry. The problem is acerbated by distance because the beam width, not in degrees but distance is larger the further away the targets are.

Thanks for picking up on my error.

Foggy

Jimbo2010 · 22-09-2010, 18:42

I was planning on mounting it on the stern, about 9' above the water, sound ok?

senormechanico · 22-09-2010, 19:55

Quote:

Originally Posted by Jimbo2010

I was planning on mounting it on the stern, about 9' above the water, sound ok?

Get the 30 degree vertical beamwidth scan comfortably above your eyes...

**Adelie** · 22-09-2010, 20:47

Quote:

Originally Posted by foggysail

Of course. I was half awake this morning plus I was in a hurry. The problem is acerbated by distance because the beam width, not in degrees but distance is larger the further away the targets are.

Thanks for picking up on my error.

Foggy

Wasn't an error, it was an ambiguous sentence which could be read the way you meant.