Inconsistency in the radiation pattern of the dipole antenna

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RD
RD 2020-6-20
回答： Rama Adhikarla 2020-8-26
I'm learning Antenna Toolbox and I've encountered this inconsistency.
Let's consider the default antenna dipole.
d=dipole;
pattern(d,70e6)
We'll have, as expected,
As in the guide example,
patternAzimuth(d,70e6,[0 45])
But, if I want only the pattern Azimuth at el=0°, I think I should enter simply this:
patternAzimuth(d,70e6,0)
But I obtain a completely different (and - I think - wrong) pattern. It is also non consistent with the above 3D pattern
I can't understand where is the problem. Could you help me?

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回答（1 个）

Rama Adhikarla
Rama Adhikarla 2020-8-26
The difference you see in the shape of the two patternAzimuth have to do with the magnitude limits of the plot. In the first figure of patternAzimuth at 0 and 45 degrees elevation, the plot has magnitude limit of [-2 3] and in the second plot of patternAzimuth at 0 degrees elevation, the magnitude limit is [2 2.11].
Refer the links below for more information on controlling the patternAzimuth plot properties,
  1. https://www.mathworks.com/matlabcentral/answers/373596-how-to-change-the-properties-of-patternelevation-or-patternazimuth-polarpattern-plots
  2. https://www.mathworks.com/help/antenna/ref/polarpattern-properties.html

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