# What value use Matlab to plot current function?

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ALESSANDRO FRAGIACOMO 2020 年 5 月 19 日

When I use the function " current(dipole,frequency) " i obtain a figure
The values of the density of current varies from 0 to 2.5 (in this case). Why 2.5 A/m? What value of Imax use Matlab to calculate this distribution?

#### 2 件のコメント

KSSV 2020 年 5 月 19 日
There is no inbuilt function current in MATLAB. What is that function? You shoud know what it is doing.
ALESSANDRO FRAGIACOMO 2020 年 5 月 19 日
The function current is a function of Antenna Toolbox, a Toolbox of Matlab

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### 採用された回答

Maadhav Akula 2020 年 7 月 3 日
The Antenna Toolbox uses the Method of Moments technique with Rao-Wilton-Glisson basis functions to discretize and solve Maxwell's equations over the surface of the antenna. The Current Distribution plot is showing the current per unit length, where the length is the length of the basis. In other words, the current is normalized by the basis length. For more information on the Method of Moments solver, please see the following doc page:
To view the mesh used in the Method of Moments calculation, you can use the 'mesh' function. For example:
d = dipole
current(d,75e6)
mesh(d)
Now coming to the colorbar, I think the limits are automatically set by the current distribution on the dipole, like:
i = current(d,75e6);
max_current = max(max(abs(i)))
min_current = min(min(abs(i)))
Hope this helps!

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