Patents by Inventor John Charles Farrar

John Charles Farrar 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).

  • Radio frequency identification tag
    Patent number: 7336243
    Abstract: A radio frequency identification tag attached to an object and comprising an antenna and an integrated circuit for providing object information to a separate reader. The antenna further comprises a pair of meanderline transmission lines each terminated at a first end for conductive connection to the integrated circuit. A shorting bar connected between the pair of meanderline transmission lines at the first ends is operative to match an antenna impedance with an integrated circuit impedance.
    Type: Grant
    Filed: May 28, 2004
    Date of Patent: February 26, 2008
    Assignee: Sky Cross, Inc.
    Inventors: Young-Min Jo, Frank M. Caimi, John Charles Farrar, Paul A. Tornatta, Jr.
  • Handset quadrifilar helical antenna mechanical structures
    Patent number: 7173576
    Abstract: A quadrifilar helical antenna comprising two pairs of filars having unequal lengths and phase quadrature signals propagating thereon. A disk-like impedance matching element disposed at a lower end of the antenna matches a source impedance to an antenna impedance. In certain embodiments a first crossbar connector on a substrate disposed at an upper end of the antenna electrically connects two helical filars to form a first filar pair and a second crossbar connector disposed on the substrate connects two filars to form a second filar pair.
    Type: Grant
    Filed: May 16, 2005
    Date of Patent: February 6, 2007
    Assignee: SkyCross, Inc.
    Inventors: Gregory A. O'Neill, Jr., Young-Min Jo, Paul A. Tornatta, Jr., John Charles Farrar, Murray Fugate, Ki-Chul Kim, Joon-Wan Lee
  • Integrated front end antenna
    Patent number: 7084823
    Abstract: A radio frequency transmitting and receiving apparatus comprising a filter and an antenna, wherein the input reactance of the antenna is substantially equal in magnitude and opposite in sign to the output reactance of the filter. This reactance relationship permits the antenna and filter to be collocated and avoids transformation of the input and output impedances to the conventional 50 ohms such that the filter and antenna can be connected with a conventional 50 ohm transmission line.
    Type: Grant
    Filed: February 26, 2004
    Date of Patent: August 1, 2006
    Assignee: SkyCross, Inc.
    Inventors: Frank M. Caimi, John Charles Farrar, Kerry Lane Greer, Michael H. Thursby, Donald A. Innis
  • Wideband printed monopole antenna
    Patent number: 6937193
    Abstract: An antenna comprising two monopole elements and a ground plane disposed on a dielectric substrate. The elements are spaced apart to provide spatial diversity and have a shape to provide operation in multiple frequency bands and/or over a wide bandwidth of frequencies.
    Type: Grant
    Filed: June 3, 2003
    Date of Patent: August 30, 2005
    Assignee: SkyCross, Inc.
    Inventors: Jason M. Hendler, Frank M. Caimi, Mark Montgomery, Li Chen, John Charles Farrar
  • Dual band spiral-shaped antenna
    Patent number: 6856286
    Abstract: A planar antenna comprising a spiral conductive surface comprising an inner spiral segment and an outer spiral segment. A shorting leg for connection to a ground plane and a feed leg responsive to the antenna signal (in the transmit and the receive modes) extend downwardly from the plane of the spiral segments. Performance characteristics of the antenna are responsive to the configuration and spacing of the spiral segments and the distance between the antenna and the ground plane.
    Type: Grant
    Filed: October 31, 2002
    Date of Patent: February 15, 2005
    Assignee: SkyCross, Inc.
    Inventors: Young-Min Jo, Young-Ki Kim, Frank M. Caimi, John Charles Farrar, Mark D. Nelson, Kerry Lane Greer
  • Integrated front end antenna
    Publication number: 20040227683
    Abstract: A radio frequency transmitting and receiving apparatus comprising a filter and an antenna, wherein the input reactance of the antenna is substantially equal in magnitude and opposite in sign to the output reactance of the filter. This reactance relationship permits the antenna and filter to be collocated and avoids transformation of the input and output impedances to the conventional 50 ohms such that the filter and antenna can be connected with a conventional 50 ohm transmission line.
    Type: Application
    Filed: February 26, 2004
    Publication date: November 18, 2004
    Inventors: Frank M. Caimi, John Charles Farrar, Kerry Lane Greer, Michael H. Thursby, Donald A. Innis
  • Wideband printed monopole antenna
    Publication number: 20040125020
    Abstract: An antenna comprising two monopole elements and a ground plane disposed on a dielectric substrate. The elements are spaced apart to provide spatial diversity and have a shape to provide operation in multiple frequency bands and/or over a wide bandwidth of frequencies.
    Type: Application
    Filed: June 3, 2003
    Publication date: July 1, 2004
    Inventors: Jason M. Hendler, Frank M. Caimi, Mark Montgomery, Li Chen, John Charles Farrar
  • Dual band spiral-shaped antenna
    Publication number: 20030117325
    Abstract: A planar antenna comprising a spiral conductive surface comprising an inner spiral segment and an outer spiral segment. A shorting leg for connection to a ground plane and a feed leg responsive to the antenna signal (in the transmit and the receive modes) extend downwardly from the plane of the spiral segments. Performance characteristics of the antenna are responsive to the configuration and spacing of the spiral segments and the distance between the antenna and the ground plane.
    Type: Application
    Filed: October 31, 2002
    Publication date: June 26, 2003
    Inventors: Young-Min Jo, Young-Ki Kim, Frank M. Caimi, John Charles Farrar, Mark D. Nelson, Kerry Lane Greer