Patents by Inventor Ralph Etherington

Ralph Etherington 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).

  • Arrangement for connecting selected antennas to a radio for transmitting and receiving
    Patent number: 4361905
    Abstract: A single terminal for a radio transmitter and receiver is connected to a first antenna for transmitting, and simultaneously to the first antenna or a second antenna for receiving. The connection is provided by a three port circulator having a first port connected to the first antenna, a second port connected through a quarter wavelength transmission line to a PIN diode and the second antenna, and a third port connected to the radio terminal. The radio transmitter is normally connected to the first antenna through the circulator, and the first or the second antenna is selectively and simultaneously connected to the radio receiver depending upon the conductive condition of the PIN diode.
    Type: Grant
    Filed: November 10, 1980
    Date of Patent: November 30, 1982
    Assignee: General Electric Company
    Inventors: Ralph Etherington, Joe B. Linker, Jr.