Patents by Inventor Dimitrios Sounas
Dimitrios Sounas 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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Patent number: 11404917Abstract: A system, method, and device that provides power to an electrical unit such as an Internet of Things (IoT) device that includes a transmitter that provides electrical power through electromagnetic waves, a receiver, an array that includes a plurality of metamaterial elements, such that the electrical power passes wirelessly from the transmitter to the array, and a controller that applies selective phase shifts to each of the plurality of metamaterial elements such that the electrical power is transmitted from the transmitter, reflected off the array, and is received in phase at the receiver that converts the electromagnetic waves to an electric current to power the device.Type: GrantFiled: July 27, 2021Date of Patent: August 2, 2022Assignee: Wayne State UniversityInventors: Dimitrios Sounas, Zahra Katbay, Mohammed Ismail Elnaggar
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Publication number: 20220037930Abstract: A system, method, and device that provides power to an electrical unit such as an Internet of Things (IoT) device that includes a transmitter that provides electrical power through electromagnetic waves, a receiver, an array that includes a plurality of metamaterial elements, such that the electrical power passes wirelessly from the transmitter to the array, and a controller that applies selective phase shifts to each of the plurality of metamaterial elements such that the electrical power is transmitted from the transmitter, reflected off the array, and is received in phase at the receiver that converts the electromagnetic waves to an electric current to power the device.Type: ApplicationFiled: July 27, 2021Publication date: February 3, 2022Inventors: Dimitrios Sounas, Zahra Katbay, Mohammed Ismail Elnaggar
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Patent number: 10804583Abstract: A magnet-free non-reciprocal device realized using modulated filters. The device includes one or more filters in one or more branches, where each branch connects two ports or a port and a central node. The poles and zeros of each of the first, second and third filters are modulated in time such that degenerate modes at each pole and zero is split thereby destructively interfering at one or more output ports and adding up at another output port allowing non-reciprocal transmission, isolation and/or non-reciprocal phase shift. The device is able to realize a magnet-free full-duplex communication scheme implementing a magnet-free circulator for radio frequency cancellation or a magnet-free isolator or gyrator.Type: GrantFiled: September 13, 2017Date of Patent: October 13, 2020Assignee: Board of Regents, The University of Texas SystemInventors: Ahmed Kord, Andrea Alu, Dimitrios Sounas
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Patent number: 10673407Abstract: A microelectromechanical resonant circulator device is providing, having a substrate, and at least three electrical ports supported on the substrate. At least three electromechanical resonator elements are connected with associated switch elements and an associated port. The switch elements are operative to provide commutation over time of the electromechanical resonator elements.Type: GrantFiled: November 14, 2017Date of Patent: June 2, 2020Assignees: Northeastern University, Board of Regents, The University of Texas SystemInventors: Matteo Rinaldi, Cristian Cassella, Andrea Alu, Dimitrios Sounas, Ahmed Kord
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Publication number: 20190372190Abstract: A magnet-free non-reciprocal device realized using modulated filters. The device includes one or more filters in one or more branches, where each branch connects two ports or a port and a central node. The poles and zeros of each of the first, second and third filters are modulated in time such that degenerate modes at each pole and zero is split thereby destructively interfering at one or more output ports and adding up at another output port allowing non-reciprocal transmission, isolation and/or non-reciprocal phase shift. The device is able to realize a magnet-free full-duplex communication scheme implementing a magnet-free circulator for radio frequency cancellation or a magnet-free isolator or gyrator.Type: ApplicationFiled: September 13, 2017Publication date: December 5, 2019Inventors: Ahmed Kord, Andrea Alu, Dimitrios Sounas
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Publication number: 20180138889Abstract: A microelectromechanical resonant circulator device is providing, having a substrate, and at least three electrical ports supported on the substrate. At least three electromechanical resonator elements are connected with associated switch elements and an associated port. The switch elements are operative to provide commutation over time of the electromechanical resonator elements.Type: ApplicationFiled: November 14, 2017Publication date: May 17, 2018Inventors: Matteo RINALDI, Cristian CASSELLA, Andrea ALU, Dimitrios SOUNAS, Ahmed KORD
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Patent number: 9880403Abstract: A non-reciprocal device incorporating metamaterials which exhibit non-reciprocity through angular momentum biasing. The metamaterial, such as a ring resonator, is angular-momentum biased. This is achieved by applying a suitable mechanical or spatio-temporal modulation to resonant inclusions of the metamaterial, thereby producing strong non-reciprocity. In this manner, non-reciprocity can be produced without requiring the use of large and bulky magnets to produce a static magnetic field. The metamaterials of the present invention can be realized by semiconducting and/or metallic materials which are widely used in integrated circuit technology, and therefore, contrary to magneto-optical materials, can be easily integrated into the non-reciprocal devices and large microwave or optical systems. The metamaterials of the present invention can be compact at various frequencies due to the enhanced wave-matter interaction in the constituent resonant inclusions.Type: GrantFiled: June 24, 2016Date of Patent: January 30, 2018Assignee: Board of Regents, The University of Texas SystemInventors: Andrea Alu, Dimitrios Sounas, Nicholas Estep
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Publication number: 20170212367Abstract: A non-reciprocal device incorporating metamaterials which exhibit non-reciprocity through angular momentum biasing. The metamaterial, such as a ring resonator, is angular-momentum biased. This is achieved by applying a suitable mechanical or spatio-temporal modulation to resonant inclusions of the metamaterial, thereby producing strong non-reciprocity. In this manner, non-reciprocity can be produced without requiring the use of large and bulky magnets to produce a static magnetic field. The metamaterials of the present invention can be realized by semiconducting and/or metallic materials which are widely used in integrated circuit technology, and therefore, contrary to magneto-optical materials, can be easily integrated into the non-reciprocal devices and large microwave or optical systems. The metamaterials of the present invention can be compact at various frequencies due to the enhanced wave-matter interaction in the constituent resonant inclusions.Type: ApplicationFiled: June 24, 2016Publication date: July 27, 2017Inventors: Andrea Alu, Dimitrios Sounas, Nicholas Estep
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Publication number: 20170125911Abstract: A metamaterial device exploiting parity-time symmetry to achieve ideal loss compensation. The metamaterial device includes metamaterials and metasurfaces that are engineered to respect space-time inversion symmetry, i.e., that are invariant after taking their mirror image and running time backwards. One such metamaterial device utilizes two resonators with loss and gain that exactly compensate each other thereby causing the metamaterial device to be invisible when excited from one side of the metamaterial device and reflective when excited from the other side of the metamaterial device. Furthermore, a metamaterial device may include an object covered by a portion of a metasurface with loss and another portion of the metasurface with gain, where the loss and gain exactly compensate each other. The first portion of the metasurface absorbs all of an incident wave, whereas, the second portion of the metasurface re-emits the incident wave.Type: ApplicationFiled: May 28, 2015Publication date: May 4, 2017Applicant: Board of Regents, The University of Texas SystemInventors: Andrea Alu, Romain Fleury, Dimitrios Sounas
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Patent number: 9536512Abstract: A non-reciprocal acoustic device that accomplishes non-reciprocity via linear or angular-momentum bias. The non-reciprocal acoustic device includes an azimuthally symmetric or planar acoustical cavity (e.g., ring cavity), where the cavity is biased by imposing a circular or linear motion of a gas, a fluid or a solid medium filling the cavity. Acoustic waveguides are connected to the cavity or the cavity is excited from the surrounding medium. A port of this device is excited with an acoustic wave. When the cavity is biased appropriately, the acoustic wave is transmitted to one of the other acoustic waveguides while no transmission of the acoustic wave occurs at the other acoustic waveguides. As a result, linear non-reciprocity is now realized in acoustics without distorting the input signal or requiring high input power or bulky devices.Type: GrantFiled: August 4, 2014Date of Patent: January 3, 2017Assignee: Board of Regents, The University of Texas SystemInventors: Andrea Alu, Romain Fleury, Dimitrios Sounas
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Patent number: 9405136Abstract: A non-reciprocal device incorporating metamaterials which exhibit non-reciprocity through angular momentum biasing. The metamaterial, such as a ring resonator, is angular-momentum biased. This is achieved by applying a suitable mechanical or spatio-temporal modulation to resonant inclusions of the metamaterial, thereby producing strong non-reciprocity. In this manner, non-reciprocity can be produced without requiring the use of large and bulky magnets to produce a static magnetic field. The metamaterials of the present invention can be realized by semiconducting and/or metallic materials which are widely used in integrated circuit technology, and therefore, contrary to magneto-optical materials, can be easily integrated into the non-reciprocal devices and large microwave or optical systems. The metamaterials of the present invention can be compact at various frequencies due to the enhanced wave-matter interaction in the constituent resonant inclusions.Type: GrantFiled: June 5, 2014Date of Patent: August 2, 2016Assignee: Board of Regents, The University of Texas SystemInventors: Andrea Alu, Dimitrios Sounas, Nicholas Estep
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Publication number: 20160203810Abstract: A non-reciprocal acoustic device that accomplishes non-reciprocity via linear or angular-momentum bias. The non-reciprocal acoustic device includes an azimuthally symmetric or planar acoustical cavity (e.g., ring cavity), where the cavity is biased by imposing a circular or linear motion of a gas, a fluid or a solid medium filling the cavity. Acoustic waveguides are connected to the cavity or the cavity is excited from the surrounding medium. A port of this device is excited with an acoustic wave. When the cavity is biased appropriately, the acoustic wave is transmitted to one of the other acoustic waveguides while no transmission of the acoustic wave occurs at the other acoustic waveguides. As a result, linear non-reciprocity is now realized in acoustics without distorting the input signal or requiring high input power or bulky devices.Type: ApplicationFiled: August 4, 2014Publication date: July 14, 2016Inventors: Andrea Alu, Romain Fleury, Dimitrios Sounas
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Publication number: 20150030280Abstract: A non-reciprocal device incorporating metamaterials which exhibit non-reciprocity through angular momentum biasing. The metamaterial, such as a ring resonator, is angular-momentum biased. This is achieved by applying a suitable mechanical or spatio-temporal modulation to resonant inclusions of the metamaterial, thereby producing strong non-reciprocity. In this manner, non-reciprocity can be produced without requiring the use of large and bulky magnets to produce a static magnetic field. The metamaterials of the present invention can be realized by semiconducting and/or metallic materials which are widely used in integrated circuit technology, and therefore, contrary to magneto-optical materials, can be easily integrated into the non-reciprocal devices and large microwave or optical systems. The metamaterials of the present invention can be compact at various frequencies due to the enhanced wave-matter interaction in the constituent resonant inclusions.Type: ApplicationFiled: June 5, 2014Publication date: January 29, 2015Inventors: Andrea Alu, Dimitrios Sounas, Nicholas Estep