Isis Innovation Limited

Other

Oxford University Innovation Limited

Metaboards Holdings Ltd

Christopher Stevens

David John Edwards

Harvey John Burd

Irina Khromova

Ekaterina Shamonina

Tong Hao

Christopher Wing Tai Chan

John B Stevens

Jan Paszkiewicz

Yue Li

Laszlo Solymar

The present invention relates to an electrical resonator (), and an array () comprising a plurality of the electrical resonators (). The electrical resonator () comprises an inductor coil comprising at least one turn. The at least one turn comprises an outer turn defining an outer coil perimeter (). The electrical resonator comprises at least one capacitor connected to the inductor coil. The outer coil perimeter () comprises four major edges (). Each of the major edge () is substantially linear and arranged on a different edge of a quadrilateral. The outer coil perimeter () comprises four minor edges () connecting the major edges (). The array () comprises a first plurality of the electrical resonators () arranged in a first layer, and a second plurality of the electrical resonators () arranged in a second layer on top of the first layer. The minor edge () of each electrical resonator substantially abuts the minor edge () of an adjacent electrical resonator in the same layer, and the first and second layer together define a quadrilateral array of the electrical resonators (), with a centre of each inductor coil in the first layer coincident with the centre of a gap region between inductor coils in the second layer. A method of arranging a plurality of electrical resonators in an array is also disclosed.

Electrical resonators

A method of configuring a metamaterial structure comprising a plurality of electrical resonators () that support magnetoinductive waves is disclosed. The method comprises: powering at least one of the electrical resonators () with an alternating current at an excitation frequency, the at least one powered electrical resonator providing a source of magnetoinductive waves in the structure; adjusting parameters of the metamaterial structure to create constructive interference of one- two- or three-dimensional magnetoinductive waves at one or more target resonators of the electrical resonators (), to improve power transfer from the at least one powered electrical resonator to the one or more target resonators ().

Magnetoinductive wave control

A re-configurable magnetoinductive waveguide (), comprising a plurality of resonator cells, wherein each resonator cell comprises a primary resonator () that is inductively coupled to a primary resonator () of at least one other resonator cell, and wherein at least one of the plurality of resonator cells is a controllable cell () which further comprises a control element (), the control element () having an active control component () that is operable to adjust the impedance of the primary resonator () of the controllable cell () in response to a control signal; wherein: the control element () comprises a secondary resonator, the secondary resonator is inductively coupled to the primary resonator (), and the active control component () is arranged to vary the electrical properties of the secondary resonator in response to the control signal.

Magnetoinductive waveguide

Waveguide A waveguide for carrying waves by inductive coupling comprises a plurality of resonant elements, the plurality of resonant elements including a first resonant element; a second resonant element; and a coupling section capacitively coupling the first and second resonant elements, wherein the coupling between the first and second elements produces a first pass-band and a second-pass band, different from the first pass-band, the first pass-band being associated with the resonance of the resonant elements and the second pass-band being associated with resonance of the coupling section.

Waveguide

A magneto-inductive waveguide comprising a plurality of resonant elements, the plurality of resonant elements including a first resonant element comprising a conductive loop broken by at least one capacitive gap, and a second resonant element comprising a conductive loop broken by at least one capacitive gap, the second resonant element for magneto-inductively coupling with the first resonant element; wherein the first resonant element and second resonant element are conductively coupled.

Magneto-inductive waveguide

A common communications device comprising an array of near-field coupled resonant elements, the elements each comprising a coupling portion comprising a loop portion with free ends, the device being provided in combination with a data transmission unit and a data reception unit, each unit having a coupling portion, the units being arranged to communicate with one another by means of the coupling portion of each unit and the common communications device, the coupling portion of the data transmission unit comprising a resonant element comprising a loop portion arranged to be near-field coupled to the loop portion of a first resonant element of the device, the coupling portion of the data reception unit comprising a resonant element comprising a loop portion arranged to be near-field coupled to the loop portion of a second resonant element of the device not being the first resonant element.

Common communications device

An imaging system for an object such as human or animal tissue uses scattering of an illuminating electromagnetic wave by acoustic vibrations to generate a scattered electromagnetic wave including Doppler components shifted from the frequency of the illuminating electromagnetic wave by frequencies of the acoustic vibration and multiples thereof. An acoustic transducer apparatus applies acoustic vibrations localized in two or three dimensions in a plurality of regions. A transmitter simultaneously illuminates the object with an illuminating electromagnetic wave that has a frequency in the range from 100 MHz to 100 GHz, the vibration direction of the acoustic vibration having a component parallel to the propagation direction of the illuminating electromagnetic wave. A receiver receives the scattered electromagnetic wave. A signal processing apparatus derives characteristics of the Doppler components, and stores image data representing the derived characteristic.

Investigation of physical properties of an object

A resonant assembly for identification of a buried asset comprising first and second resonant members each configured to resonate at a respective different resonant frequency when excited by an electromagnetic field. The resonant assembly is arranged to cause a near-field coupling of transmit and receive antenna of a detector at the first and second resonant frequencies such that identification of the resonant assembly is performed at least in part according to the frequencies of the coupling.

Resonant assembly, system and method for identification of a buried asset

A resonant radar reflector assembly comprising first and second reflector members (A,B), the first and second and reflector members each being configured to resonate at their respective resonant frequency when irradiated by radio frequency (RF) radiation of a corresponding frequency, wherein the first member has a portion (A) responsive to an electric field applied parallel to an electric polarization axis of the first member, the second member having a corresponding portion (B) responsive to an electric field applied parallel to a corresponding electric polarization axis of the second member, the first member also having a portion (A) responsive to a magnetic field applied parallel to a magnetic polarization axis of the first member, the second member having a corresponding portion (B) responsive to a magnetic field applied parallel to a corresponding magnetic polarization axis of the second member, the first and second members being arranged such that at least one electric or magnetic polarization axis of the first member is substantially not parallel to the corresponding electric or magnetic polarization axis of the second member.

Resonant reflector assembly and method

Apparatus for purifying liquid including a container for the liquid, means for heating the liquid when in the container to vaporize the liquid, means for cooling the vapor to form a condensate and a collector for collecting the condensate, the heating means comprising a condenser of a refrigerant circulatory systems and the cooling means comprising an evaporator of the system so that refrigerant liquified in the condenser gives off heat to heat the said liquid and evaporation of the liquid in the evaporator causes heat to be absorbed from the vapor thereby cooling the vapor to for the condensate.

Growing community of inventors

Oxford, United Kingdom

Christopher Stevens