Patent ID: 11879924
Assignee: KEYSIGHT TECHNOLOGIES, INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 17:
18. A method of determining at least one of equivalent isotropic radiated power (EIRP) or effective isotropic sensitivity (EIS) of an antenna under test (AUT) of a device under test (DUT), the method comprising:
placing the DUT in a quiet zone of a test chamber such that a geometric center of the DUT aligns with a quiet zone center of the quiet zone, wherein the AUT comprises an antenna array with an array phase center that is offset from the geometric center of the DUT by a known offset distance;
determining near-field beam peak directions of the AUT toward a probe antenna on a plurality of near-field radii based on the known offset distance of the array phase center from the geometric center of the DUT, the plurality of near-field radii, and a declared beam peak direction of the AUT;
performing measurements of antenna patterns of the AUT using the probe antenna on the plurality of near-field radii extending from the quiet zone center in the near-field beam peak directions;
compensating the measured antenna patterns of the AUT for probe gain of the probe antenna and path loss difference based on the known offset distance of array phase center of the antenna array to provide compensated antenna patterns of the AUT; and
deriving a far-field equivalent of the at least one of the EIRP or the EIS of the AUT in the declared beam peak direction of the AUT.