Abstract
Diversity reception is a widely used technique in radio communications to alleviate signal fading due to complex propagation environments such as downtown areas in large cities. This study concentrates on the design problem of an antenna array which can be used in a base station of a radio communication system to provide diversity. A design method for antenna arrays is introduced, which results in exactly the same power pattern but dissimilar phase patterns for the array. Radio signal reception using different phase pattern provides possibility to reduce destructive interference of incoming plane waves while the unchanging power pattern quarantees the fulfilment of original cell and network planning. The developed theory is rather general and can be applied for linear, planar and 3-dimensional array design. The well-known space diversity technique is shown to be a simple specific solution of the introduced method.
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