Generally in base station antenna we have two ports one is for +45 polarization and other is for -45.
So the transmission and receiving of signals takes place simultaneously or if not then how does that process occurs?
Yes, transmission and receiving of signals takes place simultaneously. This possibility exists due to the frequency diversity of the receiving and transmitting channels. Crossed dipoles provide receiving of signals of any polarization. Most dual-polar antenna systems are required to have a high degree of cross-polar discrimination (XPD) so each port receives signals only with the designated polarization.
For more details, see the book:
Chen Z.N., Luk K-M. Antennas for Base Stations in Wireless Communications, McGraw Hill, 2009.
Yes, transmission and receiving of signals takes place simultaneously. This possibility exists due to the frequency diversity of the receiving and transmitting channels. Crossed dipoles provide receiving of signals of any polarization. Most dual-polar antenna systems are required to have a high degree of cross-polar discrimination (XPD) so each port receives signals only with the designated polarization.
For more details, see the book:
Chen Z.N., Luk K-M. Antennas for Base Stations in Wireless Communications, McGraw Hill, 2009.
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