Restoring Low Sidelobe Antenna Patterns with Failed Elements in a Phased Array Antenna
MIT Lincoln Laboratory Lexington United States
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Maintaining low spatial sidelobes, despite the failureof individual antenna elements, is important for many radar andcommunication systems utilizing phased arrays. Techniques inthe literature require accurate antenna element pattern data. Inthis paper we present a new algorithm for computing lowsidelobebeamforming which only requires the originalbeamforming weights which produce low sidelobes when allelements are functioning normally. The algorithm does notrequire accurate knowledge of the antenna element patterns, andpermits user adjustment of the trade-off between sidelobe level,taper loss, and mainbeam width. Near optimum low sidelobes aredemonstrated in several examples.
- Electrical and Electronic Equipment