Time delay beam formation

Details Time delay beam formation Time delay beam formation

H - Electricity

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H03H 11/26 (2006.01) G02F 2/00 (2006.01) G06E 3/00 (2006.01) H01Q 3/26 (2006.01) H04B 10/00 (2006.01) H04B 10/02 (2006.01) G02F 1/21 (2006.01)

Patent

CA 2125696

2125696 9312474 PCTABS00023 Optical systems are disclosed which are capable of generating and rapidly changing time delays of electrical signals for true time delay beam formation and beam steering. The systems utilize an interferometer configuration. A first optical modulator (12) and a Fourier transform lens (18) define a Fourier transform plane in a first leg of the interferometer. In a second leg of interferometer, a second optical modulator (28) provides beam steering to a prism stack (30) which produces a set of plane reference waves having a range of orientations required to generate a desired range of time delays. Preferably the optical modulators (12, 28) are accousto optic Bragg cells. Alternatively, a holographic optic element could be used in place of the prism stack (30).

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