Antenna and method for utilization thereof
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United States of America Patent
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Mar 23, 1999
Grant Date -
N/A
app pub date -
Aug 16, 1996
filing date -
Aug 16, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Systems and methods for guided wave antennas are described. Apparatus is disclosed comprising: a dielectric nonphotoconductive waveguide defining a principle axis; a grating carrier connected to the dielectric nonphotoconductive waveguide, the grating carrier i) including a photoconductive material and ii) defining a photoconductive axis that is substantially parallel to the principle axis; a spatial light modulator optically connected to the layer of photoconductive material; and a source of illumination optically connected to the spatial light modulator and the layer of photoconductive material. Light from the source of illumination passes through the spatial light modulator and induces a plasma grating in the grating carrier substantially along a direction defined by the photoconductive axis so as to evanescently couple and direct electromagnetic signals traveling in the dielectric nonphotoconductive waveguide, the electromagnetic signals traveling along a direction substantially parallel to the principle axis. The systems and methods provide advantages in that high performance is achieved with a compact package.
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