Patents by Inventor Greg Tangonan
Greg Tangonan 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).
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Publication number: 20050168387Abstract: The present invention relates to a reconfigurable antenna for directing radiation from a wireless access point. More specifically, the present invention relates to a mechanically reconfigurable antenna for focusing a signal from the access point antenna in a desired direction.Type: ApplicationFiled: September 29, 2004Publication date: August 4, 2005Inventors: Greg Tangonan, Carlos Oppus, Jose Monje, Martin Arancon, Joel Marciano
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Publication number: 20050170779Abstract: The present invention relates to a power monitoring circuit for use in wireless fidelity (WiFi) systems. More specifically, the invention is a low power, inexpensive radio frequency (RF) power monitoring circuit that incorporates the integrated circuit for amplification, analog-to-digital conversion, and antenna circuit into a single simple circuit.Type: ApplicationFiled: October 14, 2004Publication date: August 4, 2005Inventors: Greg Tangonan, Carlos Oppus, Jose Monje, Joel Marciano
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Patent number: 6803559Abstract: An optically controlled micro-electromechanical (MEM) switch is described which desirably utilizes photoconductive properties of a semiconductive substrate upon which MEM switches are fabricated. In one embodiment the bias voltage provided for actuation of the switch is altered by illuminating an optoelectric portion of the switch to deactivate the switch. In an alternative embodiment, a photovoltaic device provides voltage to actuate the switch without any bias lines at all. Due to the hysteresis of the electromechanical switching as a function of applied voltage, only modest variation of voltage applied to the switch is necessary to cause the switch to open or close sharply under optical control.Type: GrantFiled: May 15, 2003Date of Patent: October 12, 2004Assignee: HRL Laboratories, LLCInventors: Tsung-Yuan Hsu, Robert Y. Loo, Greg Tangonan, Juan F. Lam
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Patent number: 6639205Abstract: An optically controlled micro-electromechanical (MEM) switch is described which desirably utilizes photoconductive properties of a semiconductive substrate upon which MEM switches are fabricated. In one embodiment the bias voltage provided for actuation of the switch is altered by illuminating an optoelectric portion of the switch to deactivate the switch. In an alternative embodiment, a photovoltaic device provides voltage to actuate the switch without any bias lines at all. Due to the hysteresis of the electromechanical switching as a function of applied voltage, only modest variation of voltage applied to the switch is necessary to cause the switch to open or close sharply under optical control.Type: GrantFiled: October 15, 2001Date of Patent: October 28, 2003Assignee: HRL Laboratories, LLCInventors: Tsung-Yuan Hsu, Robert Y. Loo, Greg Tangonan, Juan F. Lam
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Publication number: 20030193012Abstract: An optically controlled micro-electromechanical (MEM) switch is described which desirably utilizes photoconductive properties of a semiconductive substrate upon which MEM switches are fabricated. In one embodiment the bias voltage provided for actuation of the switch is altered by illuminating an optoelectric portion of the switch to deactuate the switch. In an alternative embodiment, a photovoltaic device provides voltage to actuate the switcdh without any bias lines at all. Due to the hysteresis of the electromechanical switching as a function of applied voltage, only modest variation of voltage applied to the switch is necessary to cause the switch to open or close sharply under optical control.Type: ApplicationFiled: May 15, 2003Publication date: October 16, 2003Applicant: HRL Laboratories, LLC.Inventors: Tsung-Yuan Hsu, Robert Y. Loo, Greg Tangonan, Juan F. Lam
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Patent number: 6538621Abstract: A tuneable impedance surface for steering and/or focusing a radio frequency beam. The tunable surface comprises a ground plane; a plurality of elements disposed a distance from the ground plane, the distance being less than a wavelength of the radio frequency beam; and a capacitor arrangement for controllably varying the capacitance of at least selected ones of adjacent elements. A method of tuning the high impedance surface allows the surface to mimic, for example, a parabolic reflector or a diffraction grating.Type: GrantFiled: March 29, 2000Date of Patent: March 25, 2003Assignee: HRL Laboratories, LLCInventors: Daniel Sievenpiper, Robin J. Harvey, Greg Tangonan, Robert Y. Loo, James H. Schaffner
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Patent number: 6483480Abstract: A tuneable impedance surface for steering and/or focusing a radio frequency beam. The tunable surface comprises a ground plane; a first plurality of elements disposed in an array a first distance from the ground plane, the distance being less than a wavelength of the radio frequency beam; and a second plurality of elements disposed in an array a second distance from the ground plane, the second plurality of elements be moveable relative to the first plurality of elements.Type: GrantFiled: June 8, 2000Date of Patent: November 19, 2002Assignee: HRL Laboratories, LLCInventors: Daniel Sievenpiper, Greg Tangonan, Robert Y. Loo, James H. Schaffner
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Patent number: 6366254Abstract: A directive antenna and method of directing a radio frequency wave received by and/or transmitted from the antenna. The antenna preferably includes a high impedance surface with a plurality of antenna elements disposed on said surface, a plurality of associated demodulators and power sensors and a switch. A Vivaldi Cloverleaf antenna is disclosed.Type: GrantFiled: March 15, 2000Date of Patent: April 2, 2002Assignee: HRL Laboratories, LLCInventors: Daniel Sievenpiper, Hui-Pin Hsu, Greg Tangonan
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Publication number: 20020023999Abstract: An optically controlled micro-electromechanical (MEM) switch is described which desirably utilizes photoconductive properties of a semiconductive substrate upon which MEM switches are fabricated. In one embodiment the bias voltage provided for actuation of the switch is altered by illuminating an optoelectric portion of the switch to deactuate the switch. In an alternative embodiment, a photovoltaic device provides voltage to actuate the switch without any bias lines at all. Due to the hysteresis of the electromechanical switching as a function of applied voltage, only modest variation of voltage applied to the switch is necessary to cause the switch to open or close sharply under optical control.Type: ApplicationFiled: October 15, 2001Publication date: February 28, 2002Applicant: HRL LaboratoriesInventors: Tsung-Yuan Hsu, Robert Y. Loo, Greg Tangonan, Juan F. Lam
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Patent number: 6310339Abstract: An optically controlled micro-electromechanical (MEM) switch is described which desirably utilizes photoconductive properties of a semiconductive substrate upon which MEM switches are fabricated. In one embodiment the bias voltage provided for actuation of the switch is altered by illuminating an optoelectric portion of the switch to deactivate the switch. In an alternative embodiment, a photovoltaic device provides voltage to actuate the switch without any bias lines at all. Due to the hysteresis of the electromechanical switching as a function of applied voltage, only modest variation of voltage applied to the switch is necessary to cause the switch to open or close sharply under optical control.Type: GrantFiled: October 28, 1999Date of Patent: October 30, 2001Assignee: HRL Laboratories, LLCInventors: Tsung-Yuan Hsu, Robert Y. Loo, Greg Tangonan, Juan F. Lam