Patents by Inventor Mark Spielman

Mark Spielman 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).

  • Diplexers with low pass filter having distributed and non-distributed (lumped) elements
    Patent number: 6873225
    Abstract: A low pass filter comprises a first series of transmission line elements connected between an input and an output; and a second series of shunt elements connected from the transmission line elements to a ground of the filter. At least one of the shunt elements has a distributed portion and a lumped portion. The distributed portion may comprise a tube mounted tangentially on a printed circuit board. The lumped portion may comprises a coil with a first lead connected to the first series of transmission line elements, and a second lead extending into the tube. A tuning element is moveably disposed in the tube. The tuning element may have an opening for receiving the second lead of the coil. The low pass filter may be used in a diplexer with one or more high pass filters. The diplexer may include power transmission apparatus.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: March 29, 2005
    Assignee: Microphase Corporation
    Inventors: Mark Spielman, Necdet Ergul
  • Diplexers with low pass filter having distributed and non-distributed (lumped) elements
    Publication number: 20040207483
    Abstract: A low pass filter comprises a first series of transmission line elements connected between an input and an output; and a second series of shunt elements connected from the transmission line elements to a ground of the filter. At least one of the shunt elements has a distributed portion and a lumped portion. The distributed portion may comprise a tube mounted tangentially on a printed circuit board. The lumped portion may comprises a coil with a first lead connected to the first series of transmission line elements, and a second lead extending into the tube. A tuning element is moveably disposed in the tube. The tuning element may have an opening for receiving the second lead of the coil. The low pass filter may be used in a diplexer with one or more high pass filters. The diplexer may include power transmission apparatus.
    Type: Application
    Filed: April 15, 2003
    Publication date: October 21, 2004
    Inventors: Mark Spielman, Necdet Ergul