Patents by Inventor Michael Joseph Adkins

Michael Joseph Adkins 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 pass filter with embedded resonator
    Patent number: 8115574
    Abstract: An embedded resonator sharpens the frequency characteristics of a coaxial low pass filter. The resonator introduces finite transmission zeros to the response of the low pass filter, thereby suppressing spurious modes occurring just above the operating frequency. Two parameters are used to tune the operation of the embedded resonator. The length of an insert into the filter's transmission line substantially controls the resonant frequency, and the gap width substantially controls the coupling of the embedded resonator to the low pass filter.
    Type: Grant
    Filed: November 21, 2008
    Date of Patent: February 14, 2012
    Assignee: Alcatel Lucent
    Inventor: Michael Joseph Adkins
  • Tunable capacitive input coupling
    Patent number: 8008994
    Abstract: Various exemplary embodiments include a cavity having a tuning assembly with tunable capacitive coupling. The tuning assembly may have a recess having a specified depth, designed for a default magnitude of coupling into the cavity. A sleeve may be fully inserted within the recess to have the structure operate at that default coupling magnitude. If a different amount of coupling is desired, the sleeve may be inserted to a particular depth that only includes part of the recess, enabling repeatable tuning of a plurality of cavities.
    Type: Grant
    Filed: May 1, 2009
    Date of Patent: August 30, 2011
    Assignee: Alcatel Lucent
    Inventors: Raja K. Reddy, Yin-Shing Chong, Teppo M. Lukkarila, Michael Joseph Adkins
  • Compact tunable dual band stop filter
    Patent number: 7915978
    Abstract: Various exemplary embodiments include a technique for tuning a filter to have two stop bands. This technique may involve combination of signals from a plurality of high-band notch resonators and low-band notch resonators. Loop wires may couple both high-band and low-band notch resonators to a central conductor, thereby enabling the central conductor to transmit a signal having dual stop bands.
    Type: Grant
    Filed: January 29, 2009
    Date of Patent: March 29, 2011
    Assignee: Radio Frequency Systems, Inc.
    Inventors: Yunchi Zhang, Michael Joseph Adkins
  • COMPACT TUNABLE DUAL BAND STOP FILTER
    Publication number: 20100188174
    Abstract: Various exemplary embodiments include a technique for tuning a filter to have two stop bands. This technique may involve combination of signals from a plurality of high-band notch resonators and low-band notch resonators. Loop wires may couple both high-band and low-band notch resonators to a central conductor, thereby enabling the central conductor to transmit a signal having dual stop bands.
    Type: Application
    Filed: January 29, 2009
    Publication date: July 29, 2010
    Applicant: Radio Frequency Systems, Inc.
    Inventors: Yunchi Zhang, Michael Joseph Adkins
  • LOW PASS FILTER WITH EMBEDDED RESONATOR
    Publication number: 20100127801
    Abstract: An embedded resonator sharpens the frequency characteristics of a coaxial low pass filter. The resonator introduces finite transmission zeros to the response of the low pass filter, thereby suppressing spurious modes occurring just above the operating frequency. Two parameters are used to tune the operation of the embedded resonator. The length of an insert into the filter's transmission line substantially controls the resonant frequency, and the gap width substantially controls the coupling of the embedded resonator to the low pass filter.
    Type: Application
    Filed: November 21, 2008
    Publication date: May 27, 2010
    Applicant: Radio Frequency Systems, Inc.
    Inventor: Michael Joseph Adkins