Information transmission device and method for systems using radiating waveguides
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United States of America Patent
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Mar 7, 2000
Grant Date -
N/A
app pub date -
Feb 7, 1997
filing date -
Feb 9, 1996
priority date (Note) -
Expired
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Abstract
In an information transmission device and method for systems using radiating waveguides along which a mobile travels, an unmodulated carrier wave is injected into the radiating waveguide. Some of the energy of the unmodulated carrier wave is sampled locally along the radiating waveguide. A local modulation signal representing information addressed to the mobile modulates the unmodulated carrier wave. The modulated carrier wave is radiated to the mobile.
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