Quote:
|
I am having difficulty determining the beam width of each antenna. Are they 30 degrees? Are they both the same?
|
The beamwidths are stated in the technical documents mentioned by ADTech in post #10. I gave the links to the technical documents in post #4 and now again here. The beamwidth is frequency dependent, and is defined as the angle between the half-power points (3dB down) each side of the max.
DB8e:
https://www.antennasdirect.com/cmss_files/attachmentlibrary/Technical%20Data%20PDF's/DB8E-TDS.pdf
The beamwidth for the DB8e is about 20 degrees.
91XG:
https://www.antennasdirect.com/cmss_files/attachmentlibrary/Technical%20Data%20PDF's/91XG-TDS.pdf
The beamwidth for the 91XG is about 33 degrees.
You would think that the beamwidths would be about the same because the gains are similar. They are not the same, because the patterns are different. The 91XG has one major lobe, but the DB8e has a major lobe and two minor lobes because it is equivalent to two DB4e antennas side-by-side. The C4 is similar, like two C2s side-by-side.
Why are you concerned about the beamwidth?