Communications: directive radio wave systems and devices (e.g. – Directive – Including a steerable array
Patent
1994-01-24
1996-12-10
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a steerable array
342372, 324 7636, 25022712, H01Q 322
Patent
active
055835163
ABSTRACT:
A wavelength-selectable optical signal processor for creating a predetermined optical delay pattern in a signal. The system includes a succession of optical delay pathways each receiving a portion of a modulated optical beam having a predetermined wavelength. The distance each beam traverses through each delay pathway varies as a function of the predetermined wavelength of the optical beam. As a result, the distance of the optical path for any of the predetermined wavelengths creates a predetermined delay pattern across the succession of optical delay pathways. In signal processing applications the delayed optical beam can be recombined in the time domain to construct a superposition of time delayed signals yielding an agile signal processor implemented using a wavelength-reconfigurable transversal filter design. In a phased-array antenna, the present invention results in a time delay network which establishes a one-to-one correspondence between antenna beam direction and optical carrier wavelength. This permits an antenna to change beam direction simply by changing the wavelength of the optical carrier.
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patent: 5375004 (1994-12-01), Ogura
Phan Dao L.
Tarcza Thomas H.
TRW Inc.
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