Patents by Inventor David H. Tropea

David H. Tropea 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).

  • System to simulate motion and plasma induced signal variations from reentry vehicles
    Patent number: 4005366
    Abstract: A system to simulate motion and plasma induced variations in the attenuation of signals transmitted from reentry vehicles uses a controlled attenuator which is programmed to vary the output power of a test transmitter in a way which simulates the variation which would be observed in actual flight. The simulator can be programmed by either an analog wave shaper or a digital driver to control the attenuation characteristics of a voltage control attenuator thus producing signal variations equivalent to those induced by the plasma sheath and motion of the vehicle.
    Type: Grant
    Filed: August 18, 1975
    Date of Patent: January 25, 1977
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventors: Joseph L. Poirier, David H. Tropea