The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 02, 2018
Filed:
Aug. 15, 2014
Analog Devices Global, Hamilton, BM;
Analog Devices Global, Hamilton, BM;
Abstract
A method for calibrating an antenna array coupled to a plurality of transmitters via a plurality of couplers and a plurality of antenna element feeds is described. The method comprises, at a communication unit: selecting and coupling at least one coupler to a calibration receiver in a feedback path in the communication unit; scaling at least one first signal by at least one first beamform weight; applying the scaled at least one first signal to a first transmitter of the plurality of transmitters and routing the scaled at least one first signal via the selected at least one coupler to the calibration receiver; generating a reference signal by selecting and scaling the at least one first signal by at least one second beamform weight substantially equal to the at least one first beamform weight; comparing the at least one first signal scaled with the at least one first beamform weight with the at least one first signal reference signal scaled by the at least one second beamform weight to determine at least one first parameter result; storing the at least one first parameter result of the comparison associated with the first transmitter; repeating for subsequent transmitters the steps of selecting and coupling a further coupler, scaling, applying at least one further signal to a further transmitter of the plurality of transmitters, generating a further reference signal, comparing and storing at least one further parameter result until the plurality of couplers have been selected; and determining at least one calibration correction coefficient from a plurality of parameter results for applying to at least one second signal input to at least one transmitter of the plurality of transmitters coupled to the antenna array to substantially equalize a transfer function of a plurality of transmit paths to antenna element feeds for the at least one second signal having beamform weights applied thereto.