System and method for adaptive correction to phased array antenna array coefficients through dithering and near-field sensing
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United States of America Patent
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Oct 30, 2012
Grant Date -
Aug 25, 2011
app pub date -
Feb 19, 2010
filing date -
Feb 19, 2010
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Abstract
A system and method of adaptively correcting the excitation or receive coefficients for a phased array antenna. For a transmitting antenna, a sensor located in the near field of the antenna is used to sense the antenna transmission. A reference signal that represents the sensor response to a desired antenna transmission that is accomplished with predetermined excitation coefficients is determined. The magnitudes and phases of the excitation coefficients are modified in a predetermined manner to create a modified antenna transmission. An actual signal that represents the sensor response to the modified antenna transmission is then determined. The excitation coefficients are then corrected using the differences between the reference signal and the actual signal, such that the modified antenna transmission becomes closer to the desired antenna transmission. The method and system also apply to a receiving antenna.
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