Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Reexamination Certificate
2011-03-22
2011-03-22
Tarcza, Thomas H (Department: 3662)
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
C342S373000, C342S377000
Reexamination Certificate
active
07911383
ABSTRACT:
A phased array antenna system with two dimensional scanning includes a two dimensional array A of antenna elements A1,1to A12,12arranged in lines; each line is associated with a respective first rank corporate feed network161to1612having outputs171,1to1712,12connected to respective antenna elements A1,1to A12,12and inputs for variable relative phase input signals. These corporate feed networks each have first and second inputs A1/B1to A12/B12connected respectively to outputs171 CD/1712CDto171EF/1712EFof different second rank corporate feed networks16CDand16EF. The corporate feed networks161to16EFconvert input signals of variable relative phase into relatively greater numbers of output signals for a phased array. The system (30) includes a phase varying circuit40for varying phase differences between input signals to each second rank corporate feed network16CDor16EFand between input signals to different second rank corporate feed networks16CDand16EFto provide control of antenna beam direction in two dimensions.
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Galt Cassi
McDonnell Boehnen & Hulbert & Berghoff LLP
QinetiQ Limited
Tarcza Thomas H
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