Follow up on beam patterns

Hi There,

I just need an answer on a very simple (not to me) question.
What does the x-axis of this beam pattern represent? Lenght, time...?

There's isn't really an x-axis, just a y-axis and an angular value. As the y-axis rotates 90 degrees it appears where the x-axis would be on a normal graph. The graph should really show 180 degrees, and not just 90 degrees.

Ok, but the 1', 2'... must mean something, normally it would be the signal power in dB

Electronics4you said:

Ok, but the 1', 2'... must mean something, normally it would be the signal power in dB

Click to expand...

Could be power, could be distance - pretty much the same thing anyway.

For a graph like this, it is probably best not to think of it having an "x-axis".

This is a "polar plot", where something is plotted against an angle.
The "x-axis" is just the scaling of the radial rings.

But what that scaling is, is a bit vague.

The notation 1', 2', 3' etc infers a distance measurment in feet.
Maybe the distance from the source which gives some signal strength.

Vague and ambiguous is my best description for it.

JimB