The University of Texas System

Northeastern University

Wayne State University

Dimitrios Sounas

Andrea Alu

Ahmed Kord

Nicholas Estep

Matteo Rinaldi

Cristian Cassella

Mohammed Ismail Elnaggar

Zahra Katbay

Romain Fleury

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.

Metamaterial reflectors for radio-frequency wireless power transfer

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.

Magnetless non-reciprocal devices using modulated filters

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.

Microelectromechanical resonant circulator

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. Additionally, by using the metamaterials of the present invention, the power consumed in the biasing network is drastically reduced.

Magnetic-free non-reciprocal devices exhibiting non-reciprocity through angular momentum biasing

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.

Growing community of inventors

Austin, TX, United States of America

Dimitrios Sounas