Antenna Toolbox, how pattern function works?

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ALESSANDRO FRAGIACOMO 2020-10-19

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https://ww2.mathworks.cn/matlabcentral/answers/619073-antenna-toolbox-how-pattern-function-works

评论： ALESSANDRO FRAGIACOMO 2020-11-9

Hello everyone, i have 3 questions:

1) In the documentation of the pattern function is writted: "By default, in Antenna Toolbox™, the far-field radius is set to 100λ". What does it means?

If Matlab uses the division of the field in far and near filed, like in this figure

and like is write in the documentation ( https://it.mathworks.com/help/antenna/ug/field-analysis.html ).

2) If i use an array of 20 dipole of 0.15 m length and 0.001 width, where the distance element by element is 0.15m, the dimension D used to calculate the far-field is 0.15*20?

3) At which point is calculed the max value of electric field that I see if i use the function pattern(arrayObject,freq,'Type','efield') when the object is an array of total length=4m? It can not be [0;0;1] because [0;0;1] are not in far-field-region!