Patents by Inventor John L. Champion

John L. Champion 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).

  • Lorentz force assisted switch
    Patent number: 6985058
    Abstract: A Lorentz force assisted microelectromechanical switch is provided which is configured to have a capacitive switch and an electrical conductor placed in transversely extending electric and magnetic fields to generate the Lorentz force sufficient to operate the capacitive switch.
    Type: Grant
    Filed: September 17, 2003
    Date of Patent: January 10, 2006
    Assignee: The Johns Hopkins University
    Inventors: William P. D'Amico, John L. Champion, Gabriel M. Rebeiz, Dennis K. Wickenden, Robert B. Givens
  • Lorentz force driven mechanical filter/mixer designs for RF applications
    Patent number: 6819103
    Abstract: A Lorentz force-driven mechanical resonator apparatus that utilizes a high-Q resonant structure as both a mixing device and a high-Q bandpass filter. Specifically, an external time varying, but quasistatic, magnetic field is applied to the resonating device while simultaneously running a time varying electrical current through the device. The resulting Lorentz force (I×B) is proportional to the vector product of the electrical current in the bar (I) and the external magnetic field (B). Integrating such a resonant device with a magnetic field coil produces the functionality of an ideal radio frequency (RF) mixer coupled with a high-Q intermediate frequency (IF) filter. Wide tunability provides the capability to scan, or even step, an array of filters having very narrow bandwidths via a common local oscillator to a desired frequency range.
    Type: Grant
    Filed: November 21, 2002
    Date of Patent: November 16, 2004
    Assignee: The Johns Hopkins University
    Inventors: John L. Champion, Robert Osiander, Robert B. Givens, Dennis K. Wickenden, Daniel G. Jablonski, James H. Higbie, Scott T. Radcliffe, Margaret A. Darrin, Thomas J. Kistenmacher, Douglas A. Oursler
  • Lorentz force driven mechanical filter/mixer designs for rf applications
    Publication number: 20040150398
    Abstract: A Lorentz force-driven mechanical resonator apparatus that utilizes a high-Q resonant structure as both a mixing device and a high-Q bandpass filter. Specifically, an external time varying, but quasistatic, magnetic field is applied to the resonating device while simultaneously running a time varying electrical current through the device. The resulting Lorentz force (I×B) is proportional to the vector product of the electrical current in the bar (I) and the external magnetic field (B). Integrating such a resonant device with a magnetic field coil produces the functionality of an ideal radio frequency (RF) mixer coupled with a high-Q intermediate frequency (IF) filter. Wide tunability provides the capability to scan, or even step, an array of filters having very narrow bandwidths via a common local oscillator to a desired frequency range.
    Type: Application
    Filed: November 21, 2002
    Publication date: August 5, 2004
    Inventors: John L. Champion, Robert Osiander, Robert Givens, Dennis K. Wickenden, Daniel G. Jablonski, Scott T. Radcliffe, Margaret A. Darrin, Thomas J. Macher, Douglas A. Oursler
  • Lorentz force assisted switch
    Publication number: 20040108195
    Abstract: A Lorentz force assisted microelectromechanical switch is provided which is configured to have a capacitive switch and an electrical conductor placed in transversely extending electric and magnetic fields to generate the Lorentz force sufficient to operate the capacitive switch.
    Type: Application
    Filed: September 17, 2003
    Publication date: June 10, 2004
    Inventors: William P. D'Amico, John L. Champion, Gabriel M. Rebeiz, Dennis K. Wickenden, Robert B. Givens