Phased Array Antenna Technology

A Review of Antenna Array Technologies for Point-to-Point and Point-to-Multipoint Wireless Communications at Millimeter-Wave Frequencies

“…is can, however, cause unwanted high mutual coupling which, in turn, affects the array performance negatively. While scanning, broadside antenna arrays are subjected to a degradation of the mainlobe gain due to the aperture projection loss [23]. In ideal conditions, the gain degradation while scanning off boresight, also referred to as scan power loss, follows the cos θ law.…”

“…In ideal conditions, the gain degradation while scanning off boresight, also referred to as scan power loss, follows the cos θ law. In real life, because of the impact of parasitic mutual coupling, scan loss is actually more severe and can be effectively modeled as cos n θ, where n is a real-valued parameter larger than 1. e following considerations can be made [23]:…”