Inconsistency in the radiation pattern of the dipole antenna

Question

RD 2020-6-20

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https://ww2.mathworks.cn/matlabcentral/answers/551785-inconsistency-in-the-radiation-pattern-of-the-dipole-antenna

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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RD 2020-6-23

I can't understand where is the problem. Could you help me?

RD 2020-6-25

I can't understand where is the problem. Could you help me?

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Answer 1

Rama Adhikarla 2020-8-26

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/551785-inconsistency-in-the-radiation-pattern-of-the-dipole-antenna#answer_485060

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,