Discussion
What is an antenna array?
Answer: A
An array is a group of elements whose radiated fields add vectorially to produce a pattern none of them could give alone, and the amplitudes and phases of the feeds are the design variables. A multiband antenna, a reflector and a collection of independent antennas on a common support are all different things. The point of an array is that the aperture, and therefore the directivity, can be made as large as the structure allows without any single element being large.
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