Patents by Inventor Robert Loo

Robert Loo 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).

  • Patent number: 7405641
    Abstract: A micro-electro-mechanical switch is described. The switch comprises a substrate, with a signal transmission portion and an activation portion attached with the substrate. The activation portion includes an armature activation electrode positioned above a substrate activation electrode. The signal transmission portion includes a metal contact extending from a conducting transmission line and through a bottom insulating layer of the signal transmission portion, thereby being exposed for electrical contact. A mechanical linkage connects the activation portion with the signal transmission portion so that the activation portion and the signal transmission portion move in concert. When an activation signal is applied along the activation portion, both the activation portion and the signal transmission portion are drawn toward the substrate to a substantially closed position, where the metal contact of the signal transmission portion electrically contacts a signal transmission electrode.
    Type: Grant
    Filed: April 21, 2005
    Date of Patent: July 29, 2008
    Assignee: HRL Laboratories, LLC
    Inventors: Tsung-Yuan Hsu, Adele Schmitz, David Chang, Robert Loo
  • Publication number: 20060181379
    Abstract: A micro-electromechanical system (MEMS) switch formed on a substrate, the switch comprising a transmission line formed on the substrate, a substrate electrostatic plate formed on the substrate, and an actuating portion. The actuating portion comprises a cantilever anchor formed on the substrate and a cantilevered actuator arm extending from the cantilever anchor. Attraction of the actuator arm toward the substrate brings an electrical contact into engagement with the portions of the transmission line separated by a gap, thus bridging the transmission line gap and closing the circuit. In order to maximize electrical isolation between the transmission line and the electrical contact in an OFF-state while maintaining a low actuation voltage, the actuator arm is bent such that the minimum separation distance between the transmission line and the electrical contact is equal to or greater than the maximum separation distance between the substrate electrostatic plate and arm electrostatic plate.
    Type: Application
    Filed: April 5, 2006
    Publication date: August 17, 2006
    Inventors: Robert Schwartz, Ming Wu, Tsung-Yuan Hsu, Adele Schmitz, Robert Loo, James Schaffner, Gregory Tangonan
  • Publication number: 20050035915
    Abstract: A reconfigurable wide band phased array antenna for generating multiple antenna beams for multiple transmit and receive functions. The antenna array comprises multiple long non-resonant TEM slot antenna apertures with RF MEMS switches disposed within the slots. The RF MEMS switches are positioned directly within the feed lines across the slots to directly control the coupling of RF energy to the slots. Multiple RF MEMS switches are used within each slot, which allows multiple transmit/receive functions and/or multiple frequencies to be supported by each slot. The frequency coverage provided by the slot antenna has a greater than 10:1 frequency range.
    Type: Application
    Filed: February 6, 2002
    Publication date: February 17, 2005
    Inventors: Stan Livingston, Jar Lee, James Schaffner, Robert Loo
  • Patent number: 6847277
    Abstract: A torsion spring for an electro-mechanical switch is presented. The torsion spring comprises a set of tines including at least one tine extending from the free end of the armature of a switch. A terminus portion is rotatably suspended between the tines, and includes a conducting transmission line, at least a portion of which is exposed for electrical contact. The conducting transmission line has a length selected such that the exposed portion of the transmission line forms a circuit between the input and output of the micro-electro-mechanical switch when the micro-electro-mechanical switch is urged into a closed position, with the terminus portion rotating via the tines to form a conformal connection between the exposed portion of the conducting transmission line and the input and output of the switch, thus optimizing the electrical flow therebetween. The switch is also applied to MEMS devices.
    Type: Grant
    Filed: May 11, 2004
    Date of Patent: January 25, 2005
    Assignee: HRL Laboratories, LLC
    Inventors: Tsung-Yuan Hsu, Robert Loo, Adele Schmitz
  • Patent number: 6842097
    Abstract: A torsion spring for an electro-mechanical switch is presented. The torsion spring comprises a set of tines including at least one tine extending from the free end of the armature of a switch. A terminus portion is rotatably suspended between the tines, and includes a conducting transmission line, at least a portion of which is exposed for electrical contact. The conducting transmission line has a length selected such that the exposed portion of the transmission line forms a circuit between the input and output of the micro-electro-mechanical switch when the micro-electro-mechanical switch is urged into a closed position, with the terminus portion rotating via the tines to form a conformal connection between the exposed portion of the conducting transmission line and the input and output of the switch, thus optimizing the electrical flow therebetween. The switch is also applied to MEMS devices.
    Type: Grant
    Filed: May 11, 2004
    Date of Patent: January 11, 2005
    Assignee: HRL Laboratories, LLC
    Inventors: Tsung-Yuan Hsu, Robert Loo, Adele Schmitz
  • Publication number: 20040207497
    Abstract: A torsion spring for an electromechanical switch is presented. The torsion spring comprises a set of tines including at least one tine extending from the free end of the armature of a switch. A terminus portion is rotatably suspended between the tines, and includes a conducting transmission line, at least a portion of which is exposed for electrical contact. The conducting transmission line has a length selected such that the exposed portion of the transmission line forms a circuit between the input and output of the micro-electro-mechanical switch when the micro-electro-mechanical switch is urged into a closed position, with the terminus portion rotating via the tines to form a conformal connection between the exposed portion of the conducting transmission line and the input and output of the switch, thus optimizing the electrical flow therebetween. The switch is also applied to MEMS devices.
    Type: Application
    Filed: May 11, 2004
    Publication date: October 21, 2004
    Inventors: Tsung-Yuan Hsu, Robert Loo, Adele Schmitz
  • Publication number: 20040207499
    Abstract: A torsion spring for an electromechanical switch is presented. The torsion spring comprises a set of tines including at least one tine extending from the free end of the armature of a switch. A terminus portion is rotatably suspended between the tines, and includes a conducting transmission line, at least a portion of which is exposed for electrical contact. The conducting transmission line has a length selected such that the exposed portion of the transmission line forms a circuit between the input and output of the micro-electro-mechanical switch when the micro-electro-mechanical switch is urged into a closed position, with the terminus portion rotating via the tines to form a conformal connection between the exposed portion of the conducting transmission line and the input and output of the switch, thus optimizing the electrical flow therebetween. The switch is also applied to MEMS devices.
    Type: Application
    Filed: May 11, 2004
    Publication date: October 21, 2004
    Inventors: Tsung-Yuan Hsu, Robert Loo, Adele Schmitz
  • Patent number: 6768403
    Abstract: A torsion spring for an electro-mechanical switch is presented. The torsion spring comprises a set of tines including at least one tine extending from the free end of the armature of a switch. A terminus portion is rotatably suspended between the tines, and includes a conducting transmission line, at least a portion of which is exposed for electrical contact. The conducting transmission line has a length selected such that the exposed portion of the transmission line forms a circuit between the input and output of the micro-electro-mechanical switch when the micro-electro-mechanical switch is urged into a closed position, with the terminus portion rotating via the tines to form a conformal connection between the exposed portion of the conducting transmission line and the input and output of the switch, thus optimizing the electrical flow therebetween. The switch is also applied to MEMS devices.
    Type: Grant
    Filed: March 12, 2002
    Date of Patent: July 27, 2004
    Assignee: HRL Laboratories, LLC
    Inventors: Tsung-Yuan Hsu, Robert Loo, Adele Schmitz
  • Publication number: 20020171518
    Abstract: A torsion spring for an electro-mechanical switch is presented. The torsion spring comprises a set of tines including at least one tine extending from the free end of the armature of a switch. A terminus portion is rotatably suspended between the tines, and includes a conducting transmission line, at least a portion of which is exposed for electrical contact. The conducting transmission line has a length selected such that the exposed portion of the transmission line forms a circuit between the input and output of the micro-electro-mechanical switch when the micro-electro-mechanical switch is urged into a closed position, with the terminus portion rotating via the tines to form a conformal connection between the exposed portion of the conducting transmission line and the input and output of the switch, thus optimizing the electrical flow therebetween. The switch is also applied to MEMS devices.
    Type: Application
    Filed: March 12, 2002
    Publication date: November 21, 2002
    Inventors: Tsung-Yuan Hsu, Robert Loo, Adele Schmitz