What are "front" and "back"? If the maximum forward lobe is +10 dBi at
an elevation angle of 23 degrees and the best null is -30 dBi at an
azimuth angle 160 degrees from the peak forward lobe, and at an
elevation angle of 47 degrees, are you saying that by your definition
the front/back ratio is 40 dB? If so, I guess that's interesting but I
can't imagine what it might be good for.

Who's "we"?

Roy Lewallen, W7EL

Jerry Martes wrote:
Roy

When I was working with antennas, we considered the antenna's F/B ratio
used the max of the front compared to the max of the back. But, I get the
impression that the rules are different now.

Jerry