Antenna Seperation

[juanpico]

Hi RF Experts

I would like to ask what is the acceptable vertical separation of antenna from center to center of two different service provider if they will co-locate within the same tower.

GSM 1800
Operator 1 Freq:
UL 1725-1732.5 DL 1820-1827.5
UL 1735-1740 DL 1830-1835
UL 1745-1750 DL 1840-1845
UL 1780-1782.5 DL 1875-1877.5

Operator 2 Freq:
UL 1760-1775 DL 1855-1870
UL 1782.5-1785 DL 1877.5-1880

For thy assistance

br//juan

[rfoptman]

You can find some guidelines for antenna separations in attached links:
http://www.finetopix.com/showthread.php?25347-E*******-Antenna-Issues&highlight=antenna
http://www.finetopix.com/showthread.php?24269-ANTENNA-CONFIGURATION-GUIDELINES&highlight=antenna