How many types of antennas are used at BTS in GSM network?

you can use from links:
/http://www.kathrein.com

http://innovexpo.itee.uq.edu.au/2002...751/thesis.pdf
http://emclab.concordia.ca/~trueman/..._Lecture2w.pdf
http://www.emi.dtu.dk/education/bach...rse/31490.html

and
https://www.edaboard.com/viewtopic.p...3705&highlight

OMNI DIRECTIONAL ANTENNA R USE IN CITY TO COVER CIRCULAR AREA....

THAN DIRECTIONAL ANTENNA R USE ON HIGHWAY & RAIL TRACK TO GIVE COVERAGE IN SHAPE OF "8"......BECOZ NO CIRCULAR COVERAGE IS NEEDED...

THIS TWO ANTENNAS R GSM ANTENNA TO PROVIDE COVERAGE..



ONE MORE ANTENNA MICROWAVE ANTENNA USE TO CONNECT OTHER BTS VIA MICROWAVE LINK......

FOR ANY CONFUSION MAIL ME AT JASMINE_DOSHI34@YAHOO.COM

I have seen even patch antennas used for
cellular network design. Collinear arrays are
also very common.

Mostly Patch Antennas and Parabolic Antennas are used in Base Station.

Patch Arrays or Dipole arrays are used in Base Station Antennas which are of 14 to 21dBi Gain varies according to the coverage area.This type of Antennas are used to cover domestic area.

Parabolic Antennas are of high gain (21-25dBi) in Base Station.
This Kind of Antennas are used for transmitting r receiving between base station to base station.

Below Attached Base Station Figure with Antennas