[ARC5] YG/ZB Demo

[Jack Antonio]

On 7/4/2011 3:05 PM, Mike Morrow wrote:
> Mike wrote of the YE/ZB:
>
>> The sector edge characteristics are not formed by narrow beam width,
>> but by precisely switching the audio coding at each angle desired.
>
> Still, Mike, if the YE beam is too wide, or the ZB is too close to the
> YE, multiple sector IDs would be received at the ZB.  In that case
> discrimination for the correct sector can take place only by selecting
> the sector ID that's in the center of the sequence of the several IDs
> that are being received.


My manual for the YG system, says the antenna beam width is about 45 
degrees.

What the manual doesn't show, however, is the antenna pattern. How
many db down defines the beamwidth. 3db? 20 db?

Mike H mentioned antenna systems  that had parabolic reflectors, my
YG manual shows a flat screen reflector.  I wonder if the higher power
of the YE dictated increased front to back ratio?

Jack Antonio WA7DIA/4

>