Calibration apparatus and method for array antenna

Details Calibration apparatus and method for array antenna Calibration apparatus and method for array antenna

2007-07-24

2007-07-24

Issing, Gregory C. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

C342S372000

Reexamination Certificate

active

11235052

ABSTRACT:
The present invention relates to a calibration apparatus for an array antenna having a plurality of antenna elements. The calibration apparatus comprises a conversion unit detecting a calibration signal from an output of a transmission unit to convert the detected calibration signal into a predetermined reception radio frequency and outputting the converted calibration signal together with a reception main signal to a reception unit, a detecting unit detecting the calibration signal from an output of the reception unit for each of the antenna elements to obtain a relative phase difference between the calibration signals, and a phase correcting unit correcting a phase difference with respect to one of or both a transmission main signal and a reception main signal based on the obtained relative phase difference. This configuration can eliminate the need for a radio transmitter-receiver dedicated to a calibration signal, thus facilitating the calibrations.

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patent: 1 294 047 (2003-03-01), None
patent: 1 389 837 (2004-02-01), None
patent: 2004-297694 (2004-10-01), None

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