Patent ID: 8018380

Claim:
A system for measuring an antenna radiation pattern in a Fresnel region, comprising: a fixed antenna and a movable antenna located in the Fresnel region for acquiring a far-field radiation pattern; a moving means moving upward or downward, for adjusting a measuring angle of the movable antenna; a rotation means for rotating a rotation shaft horizontally; a vector network analyzing means for outputting an radio frequency (RF) signal to one of the fixed antenna and the movable antenna as a transmission antenna, receiving the RF signal received through the other as a receiving antenna, and detecting a complex value; a control and communication means for controlling the vector network analyzing means and a control means, and performing a data communication; and the control means for providing a vertical/horizontal rotation force to the moving means and the rotation means under a control of the control and communication means, wherein the fixed and movable antennas are spaced apart by a fixed horizontal distance D, and wherein the vector network analyzing means calculates the antenna radiation pattern based on the detected complex value, a Fourier coefficient, a compensation coefficient C mm,D for converting a complex value E D detected at the receiving antenna into an equivalent complex value E R detected at a distance R from the antenna outputting the RF signal, and a compensation coefficient C mm,S denoting a compensation value for the transmission antenna.