Next generation 5G networks will provide reliable high-speed data links between base stations and mobile devices. Base stations featuring antenna arrays with a large number of elements operating at high millimeter wave frequencies (e.g. 28 GHz) will use beam forming, i.e. shaping of the antenna's radiation pattern into desired beam shapes, to allow efficient, targeted communication with mobile phone handsets. In the handsets themselves, the use of several small chip-integrated arrays in each device becomes feasible due to the small physical size of antennas at these high frequencies.
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