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laseetha
Joined: 09 May 2007
Posts: 78
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 09 May 2007 15:21 antenna- radiation pattern |
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hello ,
i want to plot 3D radaition pattern of array of antenna using matlab
will u help me?
thanx
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09 May 2007 15:21 Ads |
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Azulykit
Joined: 18 Feb 2007
Posts: 851
Helped: 103
Location: All over the Map.
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09 May 2007 16:44 Re: antenna- radiation pattern |
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| Matlab is rich in three dimensional plotting functions. Take a look at plot3, mesh and surf. One of those will probably be useful.
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mns
Joined: 14 Apr 2007
Posts: 25
Helped: 3
Location: India
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10 May 2007 10:34 Re: antenna- radiation pattern |
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mesh and surf plots are helpful. but u shud specify the x and y axis.
the trend is to plot in U-V plane , not in x-y-z co-ordianate. in this case u=sinΘcosΦ and v=sinΘsinΦ and the amplitude will be in z direction... try it
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Azulykit
Joined: 18 Feb 2007
Posts: 851
Helped: 103
Location: All over the Map.
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11 May 2007 5:17 Re: antenna- radiation pattern |
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Just an additional thought. The plotting functions I suggested are all rectangular in nature while radiation patterns in reality are spherical.
I find the rectangular formats, both in 2D and 3D more useful to evaluate while polar or spherical formats are more consistent with our intuition but more difficult to analyze.
That is like the argument of about whether a RPN calculator is better than an algebraic entry one. (I like RPN hands down.) Use what is best for you and your application.
I was pleased to help.
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laseetha
Joined: 09 May 2007
Posts: 78
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12 May 2007 14:05 antenna- radiation pattern |
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thank u Azulykit,
i think it is better to have 2D plots
thanks for ur suggestions
i still couldnt get an idea of 3D
no problem
thanks all
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eecly
Joined: 25 Feb 2004
Posts: 47
Helped: 2
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15 May 2007 8:06 antenna- radiation pattern |
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| Have u capture the 3D data from measuremetn? You can build a 3D matrics in Matlab to plot the 3D graph
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Azulykit
Joined: 18 Feb 2007
Posts: 851
Helped: 103
Location: All over the Map.
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15 May 2007 17:28 Re: antenna- radiation pattern |
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Most pattern ranges collect measurements on a 2D basis. With careful attention to the alignmernt of the cuts one could create a 3D matrix describing the 4Π steradian pattern.
Automated ranges often provide this type of information but they are not numerous and certainly not inexpensive.
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