Page 201 - Antennas for Base Stations in Wireless Communications

174 Chapter Four

Most of the presented advanced antenna solutions are compatible
with the second- and third-generation user devices in use throughout
the world. This means that advanced antennas provide direct benefits
both during roll out of new networks and during migration of existing
networks and sites because the improvements are not dependent on a
change of equipment in the installed user base of more than four billion
mobile communication devices.

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