Patents by Inventor Gilbert H. Frank

Gilbert H. Frank 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).

  • Microwave phase shifter
    Patent number: 4507629
    Abstract: A phase shifter utilizing a circulator and electronic switches to change the length of a transmission line is disclosed. More specifically, a section of transmission line terminated in a short circuit is coupled to one port of a circulator. Energy exiting the port is reflected by the short circuited transmission line to introduce a phase delay in the signal. A PIN diode is utilized to provide a switchable short across the transmission line to reduce its electrical length thereby reducing the phase delay.
    Type: Grant
    Filed: March 1, 1983
    Date of Patent: March 26, 1985
    Inventor: Gilbert H. Frank