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

Claim 0:
1. 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 a local beam peak direction scan of an antenna pattern of the AUT using a probe antenna located at a plurality of laterally offset positions at a fixed near-field distance from the AUT to determine a beam peak direction of the AUT, wherein the probe antenna has a known probe antenna pattern;
performing EIRP near-field measurements and/or EIS near-field measurements of the AUT in the determined beam peak direction using the probe antenna located at a plurality of near-field distances from the AUT in a radial direction;
deriving a far-field equivalent of the EIRP near-field measurements and/or the EIS near-field measurements of the AUT along the determined beam peak direction; and
deriving the beam peak direction of the AUT.