METHOD AND APPARATUS FOR PHASED ARRAY ANTENNA FIELD RECALIBRATION
First Claim
1. A method of calibrating a modular phased array antenna after replacement of a component of the modular phased array antenna, the modular phased array antenna comprising a plurality of sub-arrays, each sub-array of the plurality of sub-arrays comprising a plurality of antenna elements, the method comprising:
- determining a complex correction coefficient for correcting a phase and an amplitude of a first antenna element of the plurality of antenna elements in a first sub-array of the plurality of sub-arrays;
applying the correction coefficient to a first plurality of the antenna elements in the first sub-array.
1 Assignment
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Accused Products
Abstract
A system and method for calibrating a modular phased array antenna after replacement of a component of the modular phased array antenna including a plurality of sub-arrays, each sub-array including a plurality of antenna elements. A complex correction coefficient is determined for correcting a phase and amplitude of one antenna element of the antenna elements in a first sub-array of the sub-arrays. This correction coefficient is then applied to a plurality of the antenna elements in the first sub-array. Therefore, automatic calibration of an entire sub-array of an electronically scanned antenna may be accomplished in the field without the requirement for special test equipment, and with a reduced time and energy requirement because calibration of each individual antenna element in the replaced sub-array is not required.
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Citations
15 Claims
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1. A method of calibrating a modular phased array antenna after replacement of a component of the modular phased array antenna, the modular phased array antenna comprising a plurality of sub-arrays, each sub-array of the plurality of sub-arrays comprising a plurality of antenna elements, the method comprising:
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determining a complex correction coefficient for correcting a phase and an amplitude of a first antenna element of the plurality of antenna elements in a first sub-array of the plurality of sub-arrays; applying the correction coefficient to a first plurality of the antenna elements in the first sub-array. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An electronically scanned array antenna comprising:
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an antenna array comprising a plurality of sub-arrays, each sub-array comprising a plurality of antenna elements; a feed network for transmitting signals to or from respective ones of the sub-arrays; and a control unit for determining a complex correction coefficient for correcting a phase and an amplitude of a first antenna element of the antenna elements in a first sub-array of the plurality of sub-arrays, the control unit configured to apply the complex correction coefficient to a first plurality of the antenna elements in the first sub-array.
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Specification