Planar phased array antenna assembly
First Claim
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1. A phased array antenna having a gain pattern comprising:
- a plurality of patch antenna elements arranged in an array of columns and rows having a periphery;
a separate mixer coupled to each of the patch elements;
a matrix of column and row feeder lines, each antenna element separated from the adjacent antenna element by a row feeder line and a column feeder line, each row feeder line being coupled to each mixer in a row of the antenna elements adjacent to the feeder line and each column feeder line being coupled to each mixer; and
whereinsaid mixer couples one of said feeder lines to the antenna element and a filter couples the other of said feeder lines to the antenna element.
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Abstract
A new planar phased array antenna is disclosed having M by N antenna cells with only M+N phase shifters. A grid of M+N feed lines with the M feed lines at a first frequency having a uniquely controllable phase and N feed lines at a second frequency with each feed line having a uniquely controllable phase are provided separating adjacent cells in the matrix. By coupling an antenna element through a mixer to one row and column feed, a phase for each antenna element in the array can be uniquely controlled through a scan, thereby providing a simplified planar array to be implemented as a patch antenna.
243 Citations
4 Claims
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1. A phased array antenna having a gain pattern comprising:
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a plurality of patch antenna elements arranged in an array of columns and rows having a periphery; a separate mixer coupled to each of the patch elements; a matrix of column and row feeder lines, each antenna element separated from the adjacent antenna element by a row feeder line and a column feeder line, each row feeder line being coupled to each mixer in a row of the antenna elements adjacent to the feeder line and each column feeder line being coupled to each mixer; and
whereinsaid mixer couples one of said feeder lines to the antenna element and a filter couples the other of said feeder lines to the antenna element. - View Dependent Claims (2, 3, 4)
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Specification
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Current AssigneeResearch & Development Laboratories Incorporated
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Original AssigneeResearch & Development Laboratories Incorporated
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InventorsChan, James K.
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Primary Examiner(s)Issing, Gregory C.
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Application NumberUS08/880,734Time in Patent Office813 DaysField of Search342/368, 342/371, 342/372, 342/373US Class Current342/368CPC Class CodesH01Q 21/0025 Modular arraysH01Q 21/065 Patch antenna arrayH01Q 3/22 varying the orientation in ...H01Q 3/30 varying the relative phase ...H01Q 3/42 using frequency-mixing H01Q...H01Q 9/0407 Substantially flat resonant...
