Patents by Inventor Rod Kirkhart

Rod Kirkhart 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).

  • Low cost planar double balanced mixer
    Patent number: 7305217
    Abstract: A double balanced mixer includes a local oscillator balun, a radio frequency balun and four diodes. The local oscillator balun has a transmission line, a half wavelength transmission line and a quarter wavelength transmission line mounted on a printed circuit board. The radio frequency balun has a transmission line, a half wavelength transmission line and a printed circuit line mounted on a printed circuit board. The four diodes are mounted to the printed circuit board and connected between the local oscillator balun and the radio frequency balun.
    Type: Grant
    Filed: September 16, 2004
    Date of Patent: December 4, 2007
    Inventor: Rod Kirkhart