John Rayfield

According to the spec sheet for the 30 degree horn, the elevation beamwidth is -6db at 30 degrees.

But, the drawing/graph shows -15db at 30 degrees.

So, which is it?  These two seem to contradict each other.

John Rayfield, Jr.

My understanding is that if your horns are used on Access Points here in the U.S., in the U-NII 1 spectrum, then we have to be concerned with the EIRP an elevation angle of 30 deg above the horizon (or higher).  Any signal above 30 degrees above the horizon must be no stronger than 125 mw.  From maximum legal EIRP of 4 watts, this would be about 15 db down from maximum gain.  It seem that we would need to downtilt the horns somewhat, to keep within this requirement.  But, I'm not sure how much we would need to downtilt for the various models.

Can you give me an idea as to the elevation angle for each model of the horn antennas, where the signal level would be down by 15 db from maximum gain?

John Rayfield, Jr.

I missed that in the spec sheets.  Excellent.  Just what I need to know.

Now, if Mimosa will just put your 'horns' back in their online design system, I'll have everything I need.

John

Can someone tell me what the horizontal beamwidth at 3b down, for the 30 degree, 40 degree, 50 degree and 60 degree horn antennas?

John Rayfield, Jr.