37 results about "Galvanic coupling" patented technology

Ultrasound bulk wave transducers and bulk wave transducer arrays for wide band or multi frequency band operation, in which the bulk wave is radiated from a front surface and the transducer is mounted on a backing material with sufficiently high absorption that reflected waves in the backing material can be neglected. The transducer is formed of layers that include a high impedance section comprised of at least one piezoelectric layer covered with electrodes to form an electric port, and at least one additional elastic layer, with all of the layers of the high impedance section having substantially the same characteristic impedance to yield negligible reflection between the layers. The transducer further includes a load matching section comprised of a set of elastic layers for impedance matching between the high impedance section and the load material and, optionally, impedance matching layers between the high impedance section and the backing material for shaping the transducer frequency response. For multiband operation, the high impedance section includes multiple piezoelectric layers covered with electrodes to form multiple electric ports that can further be combined by electric parallel, anti-parallel, serial, or anti-serial galvanic coupling to form electric ports with selected frequency transfer functions. Each electric port may be separately transceiver-connected to obtain parallel, anti-parallel, serial or anti-serial port coupling for multi-band transmission, and extremely wide-band reception.

Ultrasound bulk wave transducers and bulk wave transducer arrays for wide band or multi frequency band operation, in which the bulk wave is radiated from a front surface and the transducer is mounted on a backing material with sufficiently high absorption that reflected waves in the backing material can be neglected. The transducer is formed of layers that include a high impedance section comprised of at least one piezoelectric layer covered with electrodes to form an electric port, and at least one additional elastic layer, with all of the layers of the high impedance section having substantially the same characteristic impedance to yield negligible reflection between the layers. The transducer further includes a load matching section comprised of a set of elastic layers for impedance matching between the high impedance section and the load material and, optionally, impedance matching layers between the high impedance section and the backing material for shaping the transducer frequency response. For multiband operation, the high impedance section includes multiple piezoelectric layers covered with electrodes to form multiple electric ports that can further be combined by electric parallel, anti-parallel, serial, or anti-serial galvanic coupling to form electric ports with selected frequency transfer functions. Each electric port may be connected to separate electronic transceiver systems to obtain, through selection of drive signals on individual ports, selectable electric parallel, anti-parallel, serial, or anti-serial coupling of the ports in transmit mode, enabling transmission of ultrasound pulses with multi-band frequency components. In receive mode, signals from the individual electric ports can be combined after isolation amplifiers in a filter-combination unit to obtain composite electric ports with extreme wide-band transfer functions and multi-band transfer functions covering a range from a 1st to a 4th harmonic band.

An arrangement by which an external device is connected to a radio device via its antenna without modifying the radio device mechanically. The radiating element (311) of the antenna of the radio device is a conductive part of its casing, which is fed electromagnetically by means of a feed element (322). The connecting is implemented by a coupler (310) to be placed at the antenna on top of the casing, from which coupler there is an intermediate cable (350) to the external device. The coupler includes a coupling element (311), from which there is electromagnetic coupling to the radiating element (321) through a thin dielectric membrane, or direct galvanic coupling. From the coupling element to the jumper cable there is electromagnetic coupling through an intermediate element (312), or direct galvanic coupling. Because the radiating plane is located on the outer surface of the radio device, its distance to the coupling element can be made very small. Thus the attenuation caused by the coupler on the transfer path from the antenna port of the radio device to the external device is lower than in the known arrangements.

The invention discloses a method and device for strengthening a metal material through pulse current coupling laser peening, and belongs to the technical field of metal material strengthening. The method comprises the following steps of (a) pretreating the surface of the metal material; (b) determining optimal electric pulse treatment process parameters of a test sample; (c) testing the test sample by utilizing a Hopkinson pressure bar to obtain the dynamic yield strength of the metal material in the electric pulse treatment process; (d) solving the Hugoniot elastic limit of the metal material, and further obtaining the optimal laser power density of the test sample; and (e) in the electric pulse treatment process, performing laser peening strengthening treatment on the test sample by a Nd:YAG solid laser in the optimal laser power density range at the same time. Through the coupling effect of electroplastic deformation caused by electric pulses and ultrahigh-strain-rate plastic deformation induced by laser peening, the amplitude and depth of residual compressive stress are improved, and more excellent comprehensive mechanical properties are obtained.

The invention relates to a ground arrangement of a device using wireless data transfer. In order to improve the electric properties of the device and to minimize the SAR value of the device, at least one electrically conductive additional ground lead (73-75) is formed in the device in addition to the actual ground lead (72). In between the ground lead and the additional ground lead, a galvanic coupling is automatically established, when a predetermined switching criterion is fulfilled, and the aforementioned galvanic coupling is automatically released, when a predetermined release criterion is fulfilled. This enables one to change the ground configuration of an antenna such that it is as suitable as possible for the transmission and reception circumstances each time existing.

The invention relates to a ground arrangement of a device using wireless data transfer. In order to improve the electric properties of the device and to minimize the SAR value of the device, at least one electrically conductive additional ground lead (73-75) is formed in the device in addition to the actual ground lead (72). In between the ground lead and the additional ground lead, a galvanic coupling is automatically established, when a predetermined switching criterion is fulfilled, and the aforementioned galvanic coupling is automatically released, when a predetermined release criterion is fulfilled. This enables one to change the ground configuration of an antenna such that it is as suitable as possible for the transmission and reception circumstances each time existing.

The invention relates to a method and arrangement for detecting a situation in which an electrical device is connected to another electrical device. The electrical device comprises a first, second, and third electrical contact terminal (101, 102, 103). Non-zero voltage is arranged between the second and third electrical contact terminal. The other electrical device comprises counterparts (104, 105, 106) for the first, second, and third electrical contact terminal. There is a galvanic coupling (107) between the counterparts for the first and second electrical contact terminal. The arrangement comprises a resistor (108) between the first and second electrical contact terminal and a detector (112) for detecting the situation in which the electrical device is connected to the other electrical device on the basis of a change of an electrical quantity associated with the resistor. The first electrical contact terminal can be e.g. a metal shield on a USB-connector.

The invention relates to a passive repeater for forwarding radio signals from a first device having a radio interface to a second device having a radio interface, wherein the passive repeater is configured to forward radio signals between an interior of a housing, which has a housing wall acting as a radio barrier, and an exterior, through the housing wall, wherein the passive repeater has a first antenna and a second antenna for this purpose, which are connected to each other by means of passive and galvanic coupling, and wherein the first antenna can be arranged in the interior and the second antenna can be arranged in the exterior, and the passive coupling can be carried out through an opening in the housing wall, and wherein the first antenna can be inserted into the interior from the exterior through the opening and / or the second antenna can be withdrawn from the interior to the exterior through the opening. The invention further relates to a radio system having such a passive repeater, to a vehicle having such a repeater or such a radio system, to a store having such a repeater or such a radio system, and to a use of such a repeater or such a radio system.

The invention provides an isolating transformer, which comprises a magnetic core, at least two sets of transformer windings, at least one shielding layer, and a shielding layer potential lead, the shielding layer is located between the two sets of transformer windings, and the joint between the shielding layer and the shielding layer potential lead is located between both ends of the shielding layer. The invention not only can solve the problem of great common-mode interference existing in the isolating transformer, reducing the galvanic coupling generated by parasitic capacitance between thewindings, but also can reduce the influence of induced voltage at both ends of the shielding layer on the other windings, eliminating common-mode interference generated by the shielding layer, and thereby the requirement of high-speed, high-precision electric isolation testing and measurement systems is met.

A corrosive environment sensor for measuring corrosive environment inside a space between a first member that is a conductor and a second member that is a conductor or insulator includes: a base having a surface which cam face the first member that is a conductor; and an electrode which is provided on the surface of the base and formed with a material different in ionization tendency from the first member and which faces at a distance the first member so as to form a galvanic coupling with the first member, and the corrosive environment sensor measures a galvanic current between the electrode and the first member.

A package structure of a directly modulated laser in a photonics module includes a thermoelectric cooler including multiple conductor traces formed in a cool surface. The package structure further includes a directly modulated laser (DML) chip having a first electrode being attached with the cool surface and a second electrode at a distance away from the cool surface. Additionally, the package structure includes an interposer having a plurality of through-holes formed between a first surface to a second surface. The first surface is mounted to the cool surface such that each through-hole is aligned with one of the multiple conductor traces and the second surface being leveled with the second electrode. Moreover, the package structure includes a driver disposed on the second surface of the interposer with at least a galvanically coupled output port coupled directly to the second electrode of the DML chip.

The invention provides a sand blocking performance experiment device for an oil gas sand control screen pipe at a high temperature and a high pressure and belongs to the field of filtration precision measurement. The sand blocking performance experiment device for the oil gas sand control screen pipe at the high-temperature and the high pressure is particularly suitable for conducting a sand blocking performance experiment for a screen pipe at various temperatures and various pressure environments, particularly in high-temperature and high-pressure environmental conditions. The sand blocking performance experiment device for the oil gas sand control screen pipe at the high temperature and high pressure comprises a sand addition opening, a three-way connector, a temperature measuring galvanic couple I, a heating furnace, an inverted funnel seal cover, a sample fixture, a sample, a support leg, a secondary collection container, an air and sand outlet, a primary collection container, a heating sheet, experiment sand, an air inlet coil pipe, a bracket, an upper cover, a temperature measuring galvanic coupling II and an air inlet. The sand blocking performance experiment device for the oil gas sand control screen pipe at the high temperature and high pressure has the following advantages: through the experiment that under the high-temperature and high-pressure condition, the proportion of the experiment sand to pass through the sand control screen pipe is tested, the sand blocking performance of the sand control screen pipe under the high-temperature and the high-pressure conditions can be obtained; the influences of high temperature and high pressure to the sand blocking performance of the sand control screen pipe can be obtained. The sand blocking performance experiment device for the oil gas sand control screen pipe at the high temperature and high pressure has practical significance for clarifying the influences of high temperature and high pressure to the sand blocking performance of the sand control screen pipe.

A multi-ply composite duct comprised of polymeric materials, inter-ply cryogenic epoxy or sealing agent, and structural reinforcement material and methods of making the duct are disclosed. Ducts according to the present disclosure demonstrate the ability to satisfy performance requirements for transfer of single and multiphase fluids at cryogenic temperatures, and resist perforation, occlusion, combustion and galvanic coupling.

The invention discloses a fourth-order dielectric integrated waveguide filter based on galvanic coupling. The filter comprises a three-layer structure which includes a metal signal layer, a dielectric substrate and a metal ground layer from top to bottom, wherein the metal signal layer includes a first transmission line unit, a second transmission line unit, a first rectangular slot, a second rectangular slot, a third rectangular slot, a fourth rectangular slot, a fifth rectangular slot, a sixth rectangular slot, a seventh rectangular slot, and two columns of parallel and equidistantly-arranged metal via holes which extend from the metal signal layer to the metal ground layer. A zero point is generated by disposing the rectangular slots on the metal layer of the dielectric integrated waveguide filter, the fourth rectangular slot and the fifth rectangular slot are symmetrical about an intermediate horizontal axis, and the sixth rectangular slot and the seventh rectangular slot are symmetrical about the intermediate horizontal axis, thereby suppressing the generation of higher-order modes. The fourth-order dielectric integrated waveguide filter has good out-of-band suppression, simple structure, and a small size.

A multi-component system includes a first component housing a first conductive pad, a second conductive pad, and a first portion of a loop antenna that terminates on one side at the first conductive pad and on another side at the second conductive pad. The multi-component system further includes a second component housing a third conductive pad, a fourth conductive pad, and a second portion of the loop antenna that terminates on one side at the third conductive pad and on another side at the fourth conductive pad. The second component is distinct from, and configured to detachably couple with, the first component such that the first and third conductive pads, and the second and fourth conductive pads, respectively form first and second non-galvanic couplings that capacitively couple the first and second portions of the loop antenna while the first and second portions of the loop antenna remain galvanically separated.

The invention relates to a method for manufacturing an LTCC heat sink, belonging to the technical field of LTCC. The invention includes the following steps: (1) mixing and casting of the LTCC heat sink body; (2) cutting the LTCC heat sink body; (3) drilling through holes of the LTCC heat sink body; (4) thermoelectric material paste processing (6) Filling of through holes; (7) Printing of metal and thermoelectric materials; (8) Lamination; (9) Co-firing at low temperature, the present invention utilizes the galvanic coupling composed of N-type and P-type thermoelectric materials built into the LTCC. The external DC power supply works, and the N and P type thermoelectric materials are integrated with the LTCC multi-layer printing and low-temperature co-firing compatible processes, which are highly compatible with the LTCC process, which can ensure the small size of the LTCC module. It can also enhance the heat dissipation of LTCC device modules, and can be widely used in LED package heat dissipation, high-power device heat dissipation and LTCC package circuit heat dissipation.

Josephson junctions (JJ) may replace primary inductance of transformers to realize galvanic coupling between qubits, advantageously reducing size. A long-range symmetric coupler may include a compound JJ (CJJ) positioned at least approximately at a half-way point along the coupler to advantageously provide a higher energy of a first excited state than that of an asymmetric long-range coupler. Quantum processors may include qubits and couplers with a non-stoquastic Hamiltonian to enhance multi-qubit tunneling during annealing. Qubits may include additional shunt capacitances, e.g., to increase overall quality of a total capacitance and improve quantum coherence. A sign and / or magnitude of an effective tunneling amplitude Δeff of a qubit characterized by a double-well potential energy may advantageously be tuned. Sign-tunable electrostatic coupling of qubits may be implemented, e.g., via resonators, and LC-circuits. YY couplings may be incorporated into a quantum anneaier (e.g., quantum processor).