ASYMMETRICAL THREE-DIMENSIONAL RADIATING SYSTEM

摘要

Asymmetrical three-dimensional radiating system composed by a modified Yagi-Uda (YU) antenna (10, 10'), whose asymmetrical radiating pattern in elevation is provided by a three-dimensional antenna structure. The structure is formed by the positioning of the parasitic elements (12a, 12b, 12c, 12d) progressively farther away from the antenna longitudinal axis (15), substantially horizontal, the parasitic elements position are located along a curved axis (18) with the said concavity facing down and whose proximal portion is tangent to the longitudinal axis (15) and the provision of a conductive material reflector plane. The antenna is fed through a microstrip balun (14), usually used in Quasi-Yagi antennas (QY).