what is the minmum distances between two adjacent RF antennas for 3G

[Mali_TR]

Dears,

what is the minmum distances between two adjacent RF antennas for 3G Tech ? do you have any document or explanation for that.

Br,

[Nyquist]

Hi.
The only information I have is the following:

Antenna with horizontal beam width of 65º, the minimum distance is 2xLambda
Antenna with horizontal beam width of 90º, the minimum distance is 2,5xLambda
Antenna with horizontal beam width of 105º, the minimum distance is 3xLambda
Antenna with horizontal beam width of 120º, the minimum distance is 4,5xLambda

I hope it helps.
Regards
Nyquist