Patents by Inventor Hamid Reza Salehi

Hamid Reza Salehi 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).

  • Dielectric combine cavity filter having ceramic resonator rods suspended by polymer wedge mounting structures
    Patent number: 7777598
    Abstract: A combline filter has a ceramic resonator disposed inside at least one cavity wall. Because the resonator is implemented as a hollow rod, a tuning element may be inserted into an opening on the top of the rod to tune its frequency. A mounting element, inserted into an opening on the bottom of the rod secures its position inside a cavity resonator. Instead of soldering the resonator to the filter's walls, the resonator is supported above a bottom or side wall of the cavity resonator.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: August 17, 2010
    Assignee: Radio Frequency Systems, Inc.
    Inventors: Hamid Reza Salehi, Teppo M. Lukkarila
  • Triple-mode cavity filter having a metallic resonator
    Patent number: 7755456
    Abstract: A triple-mode filter is disclosed, the triple-mode filter including a cavity for confining electromagnetic waves and a metallic block acting as a resonator within that cavity. The metallic block does not contact the conductive walls of the cavity, but is instead suspended by a support element. Triple-mode resonators may be combined to produce bandpass filters having three or more poles. In other configurations, triple-mode cavity metallic resonators may be coupled to triple-mode cavity ceramic resonators or to combline resonators to achieve various filtering functions and performances suitable for different applications.
    Type: Grant
    Filed: April 14, 2008
    Date of Patent: July 13, 2010
    Assignee: Radio Frequency Systems, Inc
    Inventor: Hamid Reza Salehi
  • TRIPLE-MODE CAVITY FILTER HAVING A METALLIC RESONATOR
    Publication number: 20090256651
    Abstract: A triple-mode filter is disclosed, the triple-mode filter including a cavity for confining electromagnetic waves and a metallic block acting as a resonator within that cavity. The metallic block does not contact the conductive walls of the cavity, but is instead suspended by a support element. Triple-mode resonators may be combined to produce bandpass filters having three or more poles. In other configurations, triple-mode cavity metallic resonators may be coupled to triple-mode cavity ceramic resonators or to combline resonators to achieve various filtering functions and performances suitable for different applications.
    Type: Application
    Filed: April 14, 2008
    Publication date: October 15, 2009
    Applicant: ALCATEL LUCENT
    Inventor: Hamid Reza Salehi
  • SUSPENDED TM MODE DIELECTRIC COMBLINE CAVITY FILTER
    Publication number: 20090256652
    Abstract: A combline filter has a ceramic resonator disposed inside at least one cavity wall. Because the resonator is implemented as a hollow rod, a tuning element may be inserted into an opening on the top of the rod to tune its frequency. A mounting element, inserted into an opening on the bottom of the rod secures its position inside a cavity resonator. Instead of soldering the resonator to the filter's walls, the resonator is supported above a bottom or side wall of the cavity resonator.
    Type: Application
    Filed: April 14, 2008
    Publication date: October 15, 2009
    Applicant: ALCATEL LUCENT
    Inventors: Hamid Reza Salehi, Teppo M. Lukkarila