Mutual Coupling in Antenna Arrays
Mutual coupling is an electromagnetic phenomenon which exists in many antenna arrays. In most of the usual cases it is detrimental to the antenna operation, although there are some examples in which its presence can be beneficial. Because of its varying impact, it has attracted a large volume of research to study its causes and remedies. The effect of mutual coupling on array antennas stretches over many different areas from the conventional use of antennas to their modern employment in such exotic areas as Multiple-Input Multiple-Output (MIMO) systems, diversity systems, medical imaging, and sonar and radar systems.