Patents by Inventor by Douglas Philip Marr, co-executor

by Douglas Philip Marr, co-executor 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).

  • Phased array radars
    Patent number: 4060806
    Abstract: A phased array radar having a plurality of antennae, each connected with a respective receiving channel, is provided with apparatus to suppress variations in phase and gain in the receiving channels. The apparatus injects a reference signal into a normally provided head amplifier in each channel, which then passes through the same amplification and frequency changing circuits as the signal induced in each antennae. Thus the differential phase shifts of the reference signal and the radar carrier frequency are substantially constant. The gains of the head amplifiers are controlled by the action of an AGC loop.
    Type: Grant
    Filed: May 14, 1976
    Date of Patent: November 29, 1977
    Assignee: The Marconi Company Limited
    Inventors: Eric Davies, deceased, by Douglas Philip Marr, co-executor