Telecommunications – Transmitter and receiver at separate stations – Distortion – noise – or other interference prevention,...
Reexamination Certificate
2007-05-04
2011-12-06
Huang, Wen (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Distortion, noise, or other interference prevention,...
C455S129000, C455S562100, C455S575500, C455S107000, C455S121000, C455S122000, C455S123000, C375S295000
Reexamination Certificate
active
08073392
ABSTRACT:
The invention is a radio transmitter that includes an antenna having at least one driven element and at least one reflector element. The driven element is electrically coupled to a radio carrier source. At least one of the driven elements or the at least one reflector element, includes at least one switch to modulate the radio carrier. Also, a secure communication system includes a radio transmitter configured to transmit a modulated signal within an information beam width. Also, a method for modulating a radio signal includes the steps of causing the transmitted carrier signal to be modulated by the modulation signal in response to switching the at least one reflector switch. Also, a method for selecting desirable antenna reflector switch combinations includes performing a mathematical simulation to determine whether the combination of reflector switch positions results in a modulated signal that can be demodulated within an information beam width.
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Babakhani Aydin
Hajimiri Seyed Ali
Rutledge David B.
California Institute of Technology
Huang Wen
Milstein Joseph B.
Milstein Zhang & Wu LLC
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