Patents by Inventor Patrick Rozas

Patrick Rozas 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).

  • Doppler radar having phase modulation of both transmitted and reflected return signals
    Patent number: 4439766
    Abstract: A microwave radar signal is generated (12) for transmission through an antenna (20). Before transmission, the signal is phase modulated (18) by 0.degree. or 90.degree. amounts during each alternate half-cycles of an intermediate frequency (IF) clock signal (26). After transmission and return, the signal is again phase modulated (18) the same amounts during each alternate half-cycles. The return phase modulated signal is mixed (24) with a leakage signal component of the microwave signal, leaving an IF doppler. The IF doppler signal may then be amplified (30), removing any requirement that direct current level signals be amplified and also removing the effect of detector noise from the doppler signal.
    Type: Grant
    Filed: May 22, 1981
    Date of Patent: March 27, 1984
    Assignee: The United States of America as represented by the Administrator of the National Aeronautics & Space Administration
    Inventors: Herbert S. Kobayashi, Paul W. Shores, Patrick Rozas