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

Claim 7:
8. A method of determining at least one of equivalent isotropic radiated power (EIRP) or effective isotropic sensitivity (EIS) of an antenna under test (AUT) in a test chamber, the AUT including an antenna array with an array phase center that is offset from a center of a quiet zone of the test chamber, the method comprising:
performing local beam peak direction scans to measure antenna patterns of the AUT using a probe antenna positioned at a plurality of near-field radii from the center of the quiet zone, wherein the probe antenna has a known probe antenna pattern;
determining an actual offset of the array phase center of the antenna array based on the measured antenna patterns in the local beam peak direction scans;
compensating the measured antenna patterns for probe gain and path loss difference of the probe antenna positioned at the plurality of near-field radii to provide compensated antenna patterns of the AUT;
deriving beam peak directions of the AUT from the compensated antenna patterns; and
deriving a far-field equivalent of the at least one of the EIRP or the EIS of the AUT in the derived beam peak directions.