Also called an array antenna, antenna arrays are several antennas connected and arranged in a regular structure to form a single antenna. Antenna arrays are able to produce radiation patterns that combined, have characteristics that a single antenna would not.
Antenna Types (PDF) New antenna technologies are being developed that allow an antenna to rapidly change its pattern in response to changes in direction of arrival of the received signal. These antennas and the supporting technology are called adaptive or "smart" antennas and may be used for the higher frequencyLMR bands in the future.
