163results about How to "Suppress coupling" patented technology

A hearing aid circuit includes a correlation detector that detects correlation at a feedforward path input and that provides a correlation output to a phase shifter. The phase shifter introduces a phase shift along a feedforward path. A phase measurement circuit measures a phase shift at a feedforward path input, and provides a phase measurement output to an internal feedback processor. The internal feedback processor adjusts internal feedback as a function of the phase measurement to suppress coupling of external audio feedback along the feedforward path.

The invention provides a dual-polarized vibrator unit, an antenna and a multi-frequency antenna array. The dual-polarized vibrator unit includes a radiator and a balun support portion for feeding of the radiator. The radiator includes a dielectric substrate, two pairs of dipole antenna arms being disposed on an upper surface of the dielectric substrate and in orthogonal arrangement of plus or minus 45 degrees, and at least one coupling metal strap disposed on a lower surface of the dielectric substrate. Current induction is generated between the dipole antenna arms and the coupling metal strap so that a current path is formed on the coupling metal strap. The vibrator unit and the antenna thereof in the invention can achieve the ultra-broadband, high gain, high efficiency, high cross polarization ratio and high front-ratio, high isolation, low profile and low coupling and is simple and beautiful in structure, easy in engineering realization and suitable for mass production, the production cost is reduced, and the electrical performance index meets the base station antenna industry standard.

The invention provides a capacitive micromachined tuning fork gyroscope. The gyroscope is the symmetrical dual-mass structural gyroscope, comprising a substrate and a framework arranged in the centre of the substrate, wherein the middle of the framework is provided with a framework beam perpendicular to the framework; two detection mass blocks are symmetrically arranged in the framework with the framework beam as a symmetry axis, and four corners of each detection mass block are connected with the framework and the framework beam through at least four drive beams; decoupling drive comb capacitors are respectively arranged at both ends of each detection mass block in the direction of a vertical axis; detection comb capacitors are symmetrically arranged on both outer sides of the framework in the direction of a horizontal axis; at least four detection beams are arranged on both outer sides of the framework in the direction of the vertical axis; and the detection beams are distributed symmetrically relative to the vertical axis and the horizontal axis and are fixed on the substrate through corresponding anchor points. According to the capacitive horizontal-axis micromachined tuning fork gyroscope provided by the invention, the mechanical coupling between the detection mode and the driving mode of the micromachined tuning fork gyroscope can be solved easily and effectively.

A method for obtaining an adaptive angle-Doppler ambiguity function (AF) for a target using multiple-input-multiple-output (MIMO) radar that includes a transmit antenna array having a plurality of antenna elements. The method includes generating transmit signals for transmission by the transmit antenna array, the transmit signals defining at least a first transmit trajectory of a phase center within the transmit antenna array; transmitting the transmit signals using the transmit antenna array and receiving receive signals from the target, the receive signals resulting from the incidence of the transmit signals upon the target; and obtaining at least an angle-Doppler ambiguity function (AF) from the receive signals. The first transmit trajectory is such that, in operation, the phase center undergoes random phase center motion (PCM), such that a phase center position within the transmit antenna array varies randomly with time. A system for obtaining an AF is also disclosed.

An improved tapered fiber bundle (TFB), or assembly including a TFB, mitigates undesirable reflections from optical discontinuities at the input ends of the multimode fibers of the TFB by suppressing the coupling of signal light into modes that can produce undesired reflections. Means are provided for managing the mode field of injected signal light so that it remains substantially confined to the core of the central TFB fiber until it is past the region where it can interact with the multimode fibers of the TFB.

A multilayer dielectric substrate includes a first signal via, a second signal via, an internal-layer signal line, an internal-layer ground conductor, and ground vias. The first signal via is connected to a bias-and-control-signal terminal of a high-frequency semiconductor, and is arranged within a region corresponding to the electromagnetic shielding members. The second signal via is arranged outside the region, and is connected to an external terminal for a bias and control signal. The internal-layer signal line connects between the first and the second signal vias. The internal-layer ground conductor is arranged around the first and the second signal vias and the internal-layer signal line. The ground vias are arranged around the first and the second signal vias and the internal-layer signal line, on the internal-layer ground conductor. A resistance film is provided on at least one of an upper surface and a lower surface of the internal-layer signal line.

A low profile wideband multi-beam integrated dual polarization antenna array with compensated mutual coupling effect. Instead of suppressing mutual coupling with post-element-design techniques by attempting to block the reflections between elements, an element of the array is designed using its active impedance, i.e. its impedance with mutual coupling once the element is part of the array. The active impedance is determined using various simulation techniques and the element is then designed such that its impedance is shifted in order to modify its active impedance. This technique does not reduce the mutual coupling itself but instead, compensates for the mutual coupling effect and improves the return loss of the element.

An object of the present invention is to provide a solid-state imaging device which is capable of suppressing horizontal shading in which light and shade is generated on a display screen in a left to right direction, without increasing the signal reading-out time, and the driving method of the device. It includes pixel cells, vertical signal lines, load transistors, sampling capacitors, a horizontal signal, and a load control circuit. The load control circuit controls the load transistors functioning as loads to become disabled between the ending time of the horizontal signal reading-out period in which pixel signals are read out from the sampling capacitors to a horizontal signal line and the starting time of the vertical signal reading-out period in which pixel signals are read out from the pixel cells to vertical signal lines.

An impedance matching conductive via structure that is effectively constructed by selecting an outer conductor and an inner conductor diameter through analytical calculation or numerical simulation, such that impedance of the conductive via structure is matched to the impedance of the conductive signal traces of a printed circuit board. The conductive via structure comprises a conductive barrel that either connects to multiple ground planes or to multiple powers planes and serves as the outer conductor for a coaxial structure that provides a current return path and a matched impedance path of via transition, thus improving the signal transition and reducing signal reflection due to via discontinuity. Moreover, the conductive barrel of the conductive via structure also reduces radiation loss through a parallel plane structure and suppresses coupling between neighboring vias as the energy escaping through the conductive barrel and radiating to other vias is minimized.

The invention relates to a horizontal shaft micro-mechanical tuning fork gyroscope adopting an electrostatic balance comb tooth driver, which comprises a substrate, more than one group of driving capacitors, two detection mass blocks, a driving folded beam, a frame, more than one group of detection capacitors, a detection folded beam and an anchor point, wherein one side of each group of driving capacitors is connected with the adjacent detection mass block, the detection mass blocks are fixedly connected with the frame through the driving folded beam, the frame is respectively connected with the detection capacitors and the detection folded beam, and the detection folded beam is connected with the anchor point fixed on the substrate; and the other sides of each group of driving capacitors are sequentially connected to the detection folded beam through the driving folded beam and the frame, and the detection folded beam is connected with the anchor point fixed on the substrate. Because adopted driving movable comb teeth and adopted driving fixed comb teeth have the same thickness along the Z-axis direction, have different positions and are symmetrically distributed, the invention realizes the purpose of effectively inhibiting the coupling from a detection mode to a driving mode, thereby improving the sensitivity and the resolution of the gyroscope. The invention can be widely applied to detection of rotational angular speed of objects in various fields.

A wireless power transmission system for wirelessly transmitting electric power from a power transmitting device to a power receiving device using magnetic field coupling between a power transmitting coil and a power receiving coil is provided. The power transmitting device includes a power transmitting circuit generating an electric signal for transmitting electric power, first and second power transmitting coils compatible with first and second transmission methods, respectively, a first magnetic substance on which the first power transmitting coil is placed, a second magnetic substance on which the second power transmitting coil is placed, and a power feeding surface on which the power receiving device is to be placed. First and second attachment surfaces of the first and second magnetic substances, respectively, are located on the lower side of the power feeding surface and arranged on a same plane surface parallel to the power feeding surface.

In a multicore fiber in which multiple single mode cores are stored in one optical fiber, the multicore fiber has a lattice-point arrangement in which multiple lattice points are periodically arranged two-dimensionally with translational symmetry and rotational symmetry or one of translational symmetry and rotational symmetry and, in that lattice-point arrangement, multiple cores are arranged with the lattice points of the lattice-point arrangement as reference positions. By giving different perturbations to the propagation constants of the cores, the propagation constants of the cores are each varied from the original propagation constants. Because of the variation in the propagation constants, the core-to-core coupling amount, which is dependent on the varied propagation constants, fall below a predetermined setting amount. Suppressing the coupling between homogeneous cores in this way reduces the distance between the homogeneous cores, thus increasing the core density of the multicore fiber without increasing the types of heterogeneous cores.

Disclosed herein is a capacitative element, including: a first electrode formed on a substrate; and a second electrode provided so as to sandwich a dielectric between the first electrode and the second electrode and so as to surround the first electrode on four sides along a surface of the substrate.

Inner circumference projections of a driven coupling are engaged with inner circumference recesses of a drive coupling. Outer circumference projections of the driven coupling are engaged with outer circumference recesses of the drive coupling. A chamfered portion formed at each tip of the rotational leading-side side surface of the inner circumference projections is capable of contact with the leading-side side surface of each inner circumference recess. A rotational trailing-side circumferential end face of each outer circumference projection and a rotational trailing-side circumferential end face of each outer circumference recess are in surface-to-surface contact with each other. As a result, the drive coupling and the driven coupling can rotate integrally without rattling in the rotational direction.

A solid state imaging device has a pixel region composed of a matrix of pixel cells each including a photodiode and a charge storage portion. First and second output signal lines are in parallel and adjacent to both the charge storage portions of a first pixel cell and a second pixel cells that are adjacent on a same column. A signal voltage of a signal charge in the charge storage portion of the first pixel cell is output to the first output signal line, whereas a signal voltage of a signal charge in the charge storage portion of the second pixel cell is output to the second output signal line. The respective outputs to the first and second output signal lines are processed in parallel. A conductive layer is disposed between the charge storage portion of the first pixel cell and the second output signal line to suppress capacitive coupling.

The invention discloses a decoupling and delayed compensation method for a complex vector PI controller of a grid-connected converter. The decoupling and delayed compensation method comprises the steps of directly arranging a zero point of the controller at a pole point of a controlled object by taking a vector model of the controlled object as a basis to obtain a complex coefficient current controller model; calculating to obtain a system delay transfer function with regard to single delay of digital control and inherent zero-order maintaining characteristic of the converter; and achieving delay compensation of a current ring after connecting a delay compensation item in series with the complex vector PI controller. A single and effective method is designed for the current ring of the grid-connected converter, the problem of d-axis current and q-axis current coupling is prevented to the greatest extent, the phase margin of the system is expanded by delay compensation, the stability of the current ring is improved, and the dynamic response performance is improved.

A fiber amplifier in which the active core is surrounded by a cladding and coupling of radiation between a core mode and cladding modes is suppressed to minimize cladding mode losses in a short wavelength range. An index profile is established in the active core and in the cladding such that the core exhibits a loss above a cutoff wavelength λc and positive gains in the short wavelength range below the cutoff wavelength λc. Suppression of cladding mode losses is achieved by an arrangement for suppressing the coupling of radiation in the short wavelength range between a core mode supported the active core and a cladding mode supported by the cladding. The arrangement for suppressing can include an absorbing material or a scattering material distributed in the cladding. The arrangement for suppressing can include a non-phase-matched length section of the fiber amplifier in which the core mode and the cladding modes are not phase matched.

A white light-emitting device using a fluorescent fiber includes a blue semiconductor light-emitting element (2) for emitting an excitation light (a), and an optical fiber (3) having one side end face and the other side end face, the excitation light (a) emitted from the blue semiconductor light-emitting element (2) being made incident to the one side end face to be guided to the other side end face. The optical fiber (3) includes a core containing therein a phosphor for emitting wavelength conversion lights by being excited by the excitation light (a) received from the blue semiconductor light-emitting element (2), and a cladding member (3B) having a light emission surface in its peripheral surface, at least a part of optically multiplexed lights, which are obtained by optically multiplexing the wavelength conversion lights and the excitation light, being emitted through the light emission surface.

The invention relates to a ring core having sunk refractive indexes. Refractive index distribution of the ring core optical fiber from the outer side to the inner side has sunken areas. According to the invention, the ring core optical fiber has a design of refractive index distribution with sunken areas , so that coupling and attenuation of a module during a transmission process can be inhibitedeffectively and the optical fiber transmission distance can be increased further on the basis of not increasing system MIMO algorithm complexity.

A planar magnetic field probe is provided. The planar magnetic field probe increases the sensitivity of magnetic field intensity detection by using a left multi-sensor loop and a right multi-sensor loop formed by a first patterned metal layer and a second patterned metal layer, and decreases the electric field noise coupling by surrounding the left multi-sensor loop and the right multi-sensor loop with a symmetrical shielding metal structure formed by a first patterned shielding metal layer, a second patterned shielding metal layer and a plurality of through vias.

The invention discloses a small spacing microstrip antenna array comprising a dielectric substrate which is provided with a first surface and a second surface which are opposite to each other; a firstmicrostrip antenna and a second microstrip antenna which are arranged on the first surface of the dielectric substrate and spaced relative to each other in a first direction; and a resonant decoupling unit which comprises an open resonant ring formed by a microstrip line, wherein the open resonant ring is arranged on the first surface of the dielectric substrate and positioned between the first microstrip antenna and the second microstrip antenna. The coupling of the small spacing microstrip antenna can be suppressed.

In a starting device including a centrifugal-pendulum vibration absorbing device, while lock-up is released, a flow of working oil directed from a lock-up piston side toward a damper mechanism is produced in a clutch engagement chamber. A thrust force in the axial direction directed from the lock-up piston toward the damper mechanism is applied to a weight, of a mass body of the centrifugal-pendulum vibration absorbing device, disposed on the lock-up piston side. A support member of the centrifugal-pendulum vibration absorbing device is provided with weight support protrusions that project in the axial direction of an input shaft of a speed change device toward the weight disposed on the lock-up piston side.

Disclosed is a vehicle-mounted noise filter capable of suppressing electric field coupling between a pair of capacitors in the FM radio band, thereby allowing the intrinsic noise attenuation performance of a noise filter circuit to be exerted even in the FM radio band. The vehicle-mounted noise filter comprises a ground plate, a coil, a pair of capacitors, and a conductive shielding plate. The ground plate is grounded in a vehicle body. A lead wire is wound around the coil. The pair of capacitors are disposed such that the coil is interposed therebetween, and are electrically connected to the coil and the ground plate so as to form π-type filter circuit. The conductive shielding plate is grounded in the ground plate and is disposed between the pair of capacitors so as to shield the electric field coupling between the pair of capacitors.