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Part Number: AWR1642
I am referring swra554 app note on angular resolution. Can I assume the final angular resolution in azimuth or elevation depends only on maximum number of virtual Rx antennae in that dimension. i.e.: Non uniform array having 2 Rx virtual antennae in one column and 4Rx virtual Antennae in another column will have angular resolution of 2/4 rad(2/N).
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In reply to Vivek Dham:
Thanks for the update. I understand for uniform linear array 3dB bandwith equates to 2/N ( for large N). Can this results be extended to non uniform planar array. i.e.: deriving the array factor for planar array and get the 3dB BW to get angular resolution?
Another question raises : If we take only highest number of elements in a non uniform planar array and do angular FFT for that, can we expect angular resolution of 2/N ? Obviously we will be losing energy from other FFT points?
In reply to Siva Vinay:
Do you have any update on this question?
The formulas in the app-note are only for uniform linear arrays with a spacing of lambda/2
I am not aware of any generic formula for the resolution of a non-uniform array.However in general, (a) the resolution will increase with the total length of the antenna (distance from the first element to the last element). (b) when there is non-uniform spacing and spacing greater than lambda/2, then the side-lobe level tends to increase.[see attached example, where array B has better resolution (narrower peak), but greater side-lobes]
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