Patents by Inventor Joseph Morais

Joseph Morais has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Photonic RF distribution system
    Patent number: 7379672
    Abstract: The present photonic RF generation and distribution system provides a system and method for distributing an RF output signal. The photonic RF distribution system includes two optical sources for generating optical signals. A first optical source (42) is operable to generate a first optical signal having an operating frequency. A second optical source (44) is operable to generate a second optical signal having an operating frequency. A modulator (46) is operable to impress an RF modulation signal on a tapped portion of the first optical signal such that a modulated signal is generated. A first coupler (52) combines the modulated signal with a tapped portion of the second optical signal, thereby forming a combined signal having a difference frequency component. A control photodetector (50) is responsive to the combined signal to generate a tone signal.
    Type: Grant
    Filed: February 10, 2005
    Date of Patent: May 27, 2008
    Assignee: Northrop Grumman Corporation
    Inventors: Wenshen Wang, David C. Scott, Thomas Jin-Ming Jung, Joseph Morais
  • Photonic RF distribution system
    Publication number: 20050201759
    Abstract: The present photonic RF generation and distribution system provides a system and method for distributing an RF output signal. The photonic RF distribution system includes two optical sources for generating optical signals. A first optical source (42) is operable to generate a first optical signal having an operating frequency. A second optical source (44) is operable to generate a second optical signal having an operating frequency. A modulator (46) is operable to impress an RF modulation signal on a tapped portion of the first optical signal such that a modulated signal is generated. A first coupler (52) combines the modulated signal with a tapped portion of the second optical signal, thereby forming a combined signal having a difference frequency component. A control photodetector (50) is responsive to the combined signal to generate a tone signal.
    Type: Application
    Filed: February 10, 2005
    Publication date: September 15, 2005
    Inventors: Wenshen Wang, David Scott, Thomas Jung, Joseph Morais