Antenna Toolbox, how pattern function works?
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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!
回答（1 个）
Sharath Maadam
about 15 hours 前
0 个投票
Based on the largest dimension of the antenna or array setup,pattern will be calculated at a distance of 100 lambda by default,if this distance satisfies the far field condition. However for certain cases like large arrays, total array length will also be considered while checking for largest dimension(R1 in figure) and pattern will now be calculated at a distance(large enough) greater than 100 lambda and at the same time satisfying far field criterion.
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2020-10-19
about 15 hours 前
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