Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
John Fraschilla0
Robert M. Reese0
Date of Patent
May 8, 2007
0Patent Application Number
112199780
Date Filed
September 6, 2005
0Patent Citations Received
Patent Primary Examiner
Patent abstract
An antenna array coacts with a ground plane for radiation. Calibration of the array is accomplished with the aid of one or more extensible calibration antenna elements, such as monopole antenna elements. Each calibration monopole is ordinarily retracted below the ground plane and is not “energized.” When calibration is desired, it is extended to protrude above the ground plane so as to achieve mutual coupling with one or more of the elements of the array antenna. Calibration signals may be passed in either direction. The calibration antenna may be extended/retracted by vacuum, mechanical device, or electrical motor.
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