Patents by Inventor Fred C. Tramm

Fred C. Tramm 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).

  • Beam hopping self addressed packet switched communication system with power gating
    Patent number: 7068974
    Abstract: A downlink beam frame signal processing system (100) for a communication satellite includes a packet switch (608) that routes self addressed uplink data to a memory (804). The memory (804) stores queues for at least a first and a second downlink beam hop locations (302, 304). The processing system (100) also includes a power amplifier (108) that amplifies a waveform formed using the uplink data. A power gating circuit (1200) coupled to the power amplifier (108) includes a power gate input (1216) responsive to a power gating signal to remove RF power from at least a portion of the waveform before transmission.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: June 27, 2006
    Assignee: Northrop Grumman Corporation
    Inventors: Stuart T. Linsky, Mark E. Bever, Fred C. Tramm, Esmaell Yousefi, Reginald Jue, Scott A. Cooper
  • Gated power for a satellite hopped downlink with multiple payloads per frame
    Patent number: 6957078
    Abstract: A power gating module (200) for a downlink beam frame signal (402) includes a power amplifier (210) for amplifying for transmission frame signals that include at least a first header signal (418), a first payload signal (420), a second header signal (424), and a second payload signal (426). The power gating module (200) further includes a power gating circuit (300) coupled to the power amplifier (210). The power gating circuit (300) includes a power gate input (318) and is responsive to a power gating signal to remove power from at least one of the first header signal (418) and first payload signal (420) in combination, and the second header signal (424) and second payload signal (426) in combination before amplification by the power amplifier (210).
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: October 18, 2005
    Assignee: Northrop Grumman Corporation
    Inventors: Esmaell Yousefi, Stuart T. Linsky, Mark E. Bever, Fred C. Tramm, Lisa A. Moy-Yee, Vincent Nguyen, Gefferie H. Yee-Madera
  • Beam hopping self addressed packet switched communication system with multiple beam array antenna
    Patent number: 6944140
    Abstract: A data routing subsystem (200) for a communication satellite includes an inbound module (602) that accepts demodulated uplink data. The inbound module (602) includes a routing table (702) that stores queue tags (714) specifying downlink beam hop locations (302, 304) for the uplink data. The subsystem (200) also includes a self addressed packet switch (608) having an input port coupled to the inbound module (602), and an outbound module (610) coupled to an output port of the switch (608). A memory (804) in the outbound module (610) stores the uplink data in accordance with the downlink beam hop locations (302, 304). A multiple beam array antenna (116–122) is coupled to the outbound module (610). The multiple beam array antenna (116-122) includes a first feed element (116) assigned to a first downlink beam hop location (302) and a second feed element (118) assigned to a second downlink beam hop location (304).
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: September 13, 2005
    Assignee: Northrop Grumman Corporation
    Inventors: Stuart T. Linsky, Harvey L. Berger, Dennis A. Nivens, Garrick J. Harmon, Fred C. Tramm, Robert W. White