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208results about How to "Increase the frequency band" patented technology
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Wireless IC device
ActiveUS20090002130A1Increased antenna gainSufficient distanceRadiating elements structural formsRadio transmissionEngineeringIc devices
A wireless IC device includes a wireless IC chip having a power supply circuit including a resonant circuit having a predetermined resonant frequency and a radiation plate that externally radiates a transmission signal supplied from the power supply circuit and that supplies a reception signal externally transmitted to the power supply circuit. The radiation plate is connected to the power supply circuit via an electric field or the radiation plate is coupled to the power supply circuit via a magnetic field. The radiation plate is a two-surface-open type radiation plate including at least one radiation portion arranged to externally exchange a transmission-reception signal and a power supply portion arranged to exchange a transmission-reception signal with the power supply circuit.
Owner:MURATA MFG CO LTD
Adaptive Frequency Prediction
ActiveUS20100063802A1Error minimizationSimple structureSpeech analysisDigital computer detailsFine structureFrequency spectrum
In one embodiment, a method of transceiving an audio signal is disclosed. The method includes providing low band spectral information having a plurality of spectrum coefficients and predicting a high band extended spectral fine structure from the low band spectral information for at least one subband, where the high band extended spectral fine structure are made of a plurality of spectrum coefficients. The predicting includes preparing the spectrum coefficients of the low band spectral information, defining prediction parameters for the high band extended spectral fine structure and index ranges of the prediction parameters, and determining possible best indices of the prediction parameters, where determining includes minimizing a prediction error between a reference subband in high band and a predicted subband that is selected and composed from an available low band. The possible best indices of the prediction parameters are transmitted.
Owner:HUAWEI TECH CO LTD
Antenna
InactiveUS20050280588A1Low-profileIncrease the frequency bandSimultaneous aerial operationsAntenna supports/mountingsMiniaturizationMobile radio
On the top surface of conductive ground plate, first holder having first antenna element, second holder having second antenna element, and support having parasitic antenna element are provided such that holders and support confront each other. Respective intermediate sections of antenna elements are folded to shape like “square C” in plural times, so that antenna is formed. The foregoing construction allows low-profiling and downsizing antennas to be used in mobile radio devices.
Owner:PANASONIC CORP
Antenna unit and terminal equipment
ActiveCN110137675AIncrease the frequency bandImprove performanceSimultaneous aerial operationsAntenna supports/mountingsElectricityTerminal equipment
The embodiment of the invention provides an antenna unit and terminal equipment, relates to the technical field of communication, and aims at solving the problem that the antenna of the terminal equipment covers less frequency band and then the antenna performance of the terminal equipment is poor. The antenna unit comprises a target metal groove, M feed parts which are arranged on the bottom partof the target metal groove, M feed arms and a first insulator which are arranged in the target metal groove and a target radiator which is borne by the first insulator, wherein each of the M feed parts is electrically connected with one feed arm, the M feed parts are insulated from the target metal groove, the M feed arms are arranged between the target metal groove and the first insulator, the Mfeed parts are distributed along the diagonal direction of the target metal groove, each of the M feed arms is coupled with the target radiator and the target metal groove, the resonant frequency ofthe target radiator is different from that of the target metal groove and M is a positive integer. The antenna unit can be applied to the terminal equipment.
Owner:VIVO MOBILE COMM CO LTD
Magnetic sensing method, atomic magnetometer and magnetic resonance imaging apparatus
InactiveUS8373413B2Increase the frequency bandMeasurements using NMR imaging systemsElectric/magnetic detectionAtomic magnetometerOptical polarization
A magnetic sensing method comprises irradiating a pump light having a circularly polarized component and a probe light having a linearly polarized component onto a group of atoms contained in a cell so as to make the lights produce an intersection region and detecting a change of rotation angle of a plane of polarization of the probe light before and after passing the cell. The pump light and the probe light are irradiated in a state where a magnetic field of the direction in which the pump light strikes the intersection region is provided with a gradient.
Owner:CANON KK
High-frequency module
ActiveUS20170222617A1Improve isolation characteristicsImprove filter characteristicsMultiple-port networksTransmissionUltrasound attenuationElectromagnetic field coupling
A high-frequency module includes a propagation path that has a simple structure and improves filter characteristics by causing an inductor and a matching network to electromagnetic field couple with each other such that attenuation characteristics outside of a frequency band of a transmission signal are improved without increasing the size of the high-frequency module. In addition, unintended electromagnetic field coupling between a first filter and the inductor is significantly reduced or prevented by a shield electrode. Therefore, unintended propagation of a high-frequency signal is significantly reduced or prevented. Therefore, the attenuation characteristics outside of the frequency band of transmission signal input to the transmission terminal are improved more effectively.
Owner:MURATA MFG CO LTD
Wireless communication semiconductor integrated circuit device and mobile communication system
InactiveUS7123102B2Reduce sensitivityIncrease the frequency bandPulse automatic controlFrequency analysisLoop filterChip size
An RF IC in which a PLL circuit including a loop filter is incorporated into a semiconductor chip is achieved without increasing power consumption or chip size. The RF IC includes a VCO capable of switching oscillation frequency bands, a variable frequency divider, a phase comparator, and a loop filter, which are contained in the PLL loop. A discrimination circuit discriminates a lead or lag in a phase of an output signal from the variable frequency divider against a reference signal and an automatic band selecting circuit generates a signal for switching the frequency bands of the VCO based on output from the discrimination circuit. While switching the frequency bands of the VCO by means of bisection algorithm, the RF IC detects an optimum frequency band, and adds offset to it to determine a final usable frequency band.
Owner:RENESAS TECH CORP
Systems and methods for reducing process direction registration errors of a printhead using a linear array sensor
InactiveUS20060114283A1Increase the frequency bandReducing process direction registration errorRecording apparatusElectrographic process apparatusLinear arraysSensor system
Systems and methods are provided for detecting process direction registration errors in a printer. The errors are detected by analyzing a metric of a dash minimum response obtained from a test pattern. The test pattern contains dashes. At least one dash is shifted in the process direction in relation to another dash.
Owner:XEROX CORP
Voice enhancement device
A voice intensifier capable of reducing abrupt changes in the amplification factor between frames and realizing excellent sound quality with less noise feeling by dividing input voices into the sound source characteristic and the vocal tract characteristic, so as to individually intensify the sound source characteristic and the vocal tract characteristic and then synthesize them before being output. The voice intensifier comprises a signal separation unit for separating the input sound signal into the sound source characteristic and the vocal tract characteristic, a characteristic extraction unit for extracting characteristic information from the vocal tract characteristic, a corrective vocal tract characteristic calculation unit for obtaining vocal tract characteristic correction information from the vocal tract characteristic and the characteristic information, a vocal tract characteristic correction unit for correcting the vocal tract characteristic by using the vocal tract characteristic correction information, and a signal synthesizing means for synthesizing the corrective vocal tract characteristic from the vocal tract characteristic correction unit and the sound source characteristic, so that the sound synthesized by the signal synthesizing means is output.
Owner:FUJITSU CONNECTED TECH LTD
Interleaved circuit of flexure for disk drive
ActiveUS20130176646A1Increase the frequency bandWide bandwidthRecord information storageIntegrated arm assembliesDielectricElectrical conductor
An interleaved circuit has first branch conductors branching from a first conductor, second branch conductors branching from a second conductor, a metal base, an insulating layer of a dielectric, and a cover resin layer. The metal base comprises an opening. The first branch conductors and the second branch conductors are arranged alternately in a transverse direction of the insulating layer. A slit is formed in the insulating layer and the cover resin layer. The slit comprises a pair of opposite walls and an air gap between the opposite walls. Air introduced into the air gap forms an air layer. The slit extends longitudinally relative to the interleaved circuit along at least a part of the branch conductors.
Owner:NHK SPRING CO LTD
Surface-mounted antenna and wireless device incorporating the same
InactiveUS6433745B1Easy to adaptIncrease the frequency bandSimultaneous aerial operationsAntenna supports/mountingsMulti bandResonance
A multi-band surface-mounted antenna is formed by disposing a feeding element and a non-feeding element with a distance therebetween on a dielectric base member. The feeding element is formed by extending a feeding radiation electrode from a feeding terminal. The non-feeding element is a branched element formed by branching and extending a first radiation electrode and a second radiation electrode of the non-feeding side from a ground terminal side. The single surface-mounted antenna includes the three radiation electrodes. Thus, the antenna can be easily adapted to multi-bands. In addition, the resonance waves of the three radiation electrodes can be controlled mutually independently. As a result, only a frequency band selected from a plurality of required frequency bands is brought into a multi-resonance state so that the frequency band can be broadened.
Owner:MURATA MFG CO LTD
Sound-absorbing structure body
InactiveUS20060131104A1Sound absorptionAbsorption coefficientSound proofingVehicle componentsEngineeringRidge
A sound-absorbing structure body according to the present invention comprises a ridge-groove board (11) formed with a large number of ridges and grooves, a closing board (15) joined to the ridge-groove board so as to close one side of the ridge-groove board and thereby form a hollow portion (13), a partition board (21) for partitioning the hollow portion (13) into two or more partitioned spaces (22a, 22b), and two or more holes (25a, 25b) opened in the ridge-groove board so as to bring into communication with each of the two or more partitioned spaces (22a, 22b).
Owner:KOBE STEEL LTD
Speaker
InactiveUS20080205688A1Low profileWide frequency rangeTransducer detailsDiaphragm mounting/tensioningBobbinEngineering
A speaker includes: a magnetic circuit; a voice coil bobbin; a voice coil; a diaphragm; a frame to which the outer circumference of the diaphragm is connected via a suspension; and a spider to support the center area of the diaphragm. A magnet unit, a pole piece, a pole piece, and a yoke are included in the magnetic circuit. The yoke has a ring shape with a center opening, and is disposed at the rear of the magnet unit. The magnet unit has a ring structure having a plurality of empty portions arranged equiangularly, and the spider includes a main body and a plurality of legs extending radially outwardly from the main body and is disposed inside the magnetic circuit such that distal end tips of the legs pass beyond the inner diameter of the ring structure of the magnet unit.
Owner:MINEBEA CO LTD
Wireless communication semiconductor integrated circuit device and mobile communication system
InactiveUS20050068119A1High-precision oscillation controlShort timePulse automatic controlFrequency analysisLoop filterChip size
An RF IC in which a PLL circuit including a loop filter is incorporated into a semiconductor chip is achieved without increasing power consumption or chip size. The RF IC includes a VCO capable of switching oscillation frequency bands, a variable frequency divider, a phase comparator, and a loop filter, which are contained in the PLL loop. A discrimination circuit discriminates a lead or lag in a phase of an output signal from the variable frequency divider against a reference signal and an automatic band selecting circuit generates a signal for switching the frequency bands of the VCO based on output from the discrimination circuit. While switching the frequency bands of the VCO by means of bisection algorithm, the RF IC detects an optimum frequency band, and adds offset to it to determine a final usable frequency band.
Owner:RENESAS TECH CORP
Antenna device and mobile terminal apparatus equipped with the antenna device
ActiveUS7755546B2High bandwidthIncrease the frequency bandResonant long antennasSimultaneous aerial operationsFeed pointSlot antenna
There is provided an antenna device which includes: a loop antenna connected at one end to a feed point and connected at the other end to ground, and provided to correspond to a first frequency band; and at least one stub antenna provided in the form of extending a part of the loop antenna and provided to correspond to a second frequency band overlapping with a partial frequency band of the first frequency band to which the loop antenna corresponds.
Owner:SONY CORP
Self-tuned mass damper and system comprising the same
ActiveUS20160123422A1Increase the frequency bandConsiderable benefitVibration suppression adjustmentsShock absorbersRelative displacementEngineering
A simple self-tuned mass damper is hereby proposed for a broadened frequency band and which can be adapted to large and expensive structures as well as small and inexpensive structures alike. The novel self-tuned mass damper includes an auxiliary mass and a non-linear suspension, which is configured to connect the auxiliary mass to a vibrating structure. The mass of the auxiliary mass and the stiffness of the non-linear suspension are selected such that the natural frequency is at least 6 Hz and that the amplitude of the relative displacement of the auxiliary mass in respect to the vibrating structure is at most 12 mm.
Owner:TEKNOLOGIAN TUTKIMUSKESKUS VTT
Voice enhancement device by separate vocal tract emphasis and source emphasis
InactiveUS7152032B2Clarity easyIncrease the frequency bandSpeech synthesisFeature extractionSound sources
A voice intensifier capable of reducing abrupt changes in the amplification factor between frames and realizing excellent sound quality with less noise feeling by dividing input voices into the sound source characteristic and the vocal tract characteristic, so as to individually intensify the sound source characteristic and the vocal tract characteristic and then synthesize them before being output. The voice intensifier comprises a signal separation unit for separating the input sound signal into the sound source characteristic and the vocal tract characteristic, a characteristic extraction unit for extracting characteristic information from the vocal tract characteristic, a corrective vocal tract characteristic calculation unit for obtaining vocal tract characteristic correction information from the vocal tract characteristic and the characteristic information, a vocal tract characteristic correction unit for correcting the vocal tract characteristic by using the vocal tract characteristic correction information, and a signal synthesizing means for synthesizing the corrective vocal tract characteristic from the vocal tract characteristic correction unit and the sound source characteristic, so that the sound synthesized by the signal synthesizing means is output.
Owner:FUJITSU CONNECTED TECH LTD
Allocation of bits in an enhancement coding/decoding for improving a hierarchical coding/decoding of digital audio signals
InactiveUS20120185256A1Broaden frequency bandGood compromiseSpeech analysisFrequency bandDigital audio signals
A method of binary allocation in an enhancement coding / decoding for improving a hierarchical coding / decoding of digital audio signals, including a core coding / decoding in a first frequency band and a band extension coding / decoding in a second frequency band. For a predetermined number of bits to be allocated for the enhancement coding / decoding, a first number of bits is allocated to a coding / decoding for correcting the core coding / decoding in the first frequency band and according to a first mode of coding / decoding and a second number of bits is allocated to an enhancement coding / decoding for improving the extension coding / decoding in the second frequency band and according to a second mode of coding / decoding. Also provided are an allocation module implementing the method and a coder and decoder including this module.
Owner:FRANCE TELECOM SA
Surface Plasmon Resonance Sensing System
InactiveUS20070109544A1Small sizeIncreased sensitivityScattering properties measurementsLaboratory glasswaresSurface plasmonProtection layer
A surface plasmon resonance sensing system comprised of an incidence illuminant, a modified optical fiber, a layer of gold nanoparticles, a micro-fluidic module, and an illuminant detector; the modified optical fiber related to an optical fiber stripped off a portion of its protection layer and a cladding layer; the layer of noble metal nanoparticles covering over the modified optical fiber; the micro-fluidic module related to a micro-fluidic chip for containing the modified optical fiber and a sample; and the illuminant detector operating to detect the light emitted from the modified optical fiber.
Owner:NATIONAL CHUNG CHENG UNIV
Localized surface plasmon resonance sensing system, appartatus, method thereof
ActiveUS20100128275A1Sensor smallEasy to set upScattering properties measurementsLaboratory glasswaresOpto electronicLocalized surface plasmon
A sensing system comprises a light source, an optical fiber, a plurality of noble metal nano-particles, a micro-fluidic module and a photo detector. The optical fiber couples an incident light. The plurality of noble metal nano-particles are disposed on a surface of the optical fiber to form a noble metal nano-particle submonolayer, the noble metal nano-particles are substantially separated from each adjacent noble metal nano-particles such that the conductivity of the noble metal nano-particle submonolayer is smaller than that of a metal film. The micro-fluidic module accommodates the optical fiber and a sample, and the sample is driven to contact with the noble metal nano-particles. The photo detector detects an emergent light from the optical fiber. When the incident light interacts with the noble metal nano-particles, a signal derived from localized surface plasmon resonance in form of attenuated light or elastic scattered light is outputted through the photo detector.
Owner:INSTANT NANOBIOSENSORS CO LTD
Echo sounder transducer
ActiveUS20060001334A1Increase the frequency bandIncrease the sound pressure levelPiezoelectric/electrostriction/magnetostriction machinesPiezoelectric/electrostrictive resonant transducersAuditory radiationTransducer
The present invention achieves the wideband operation of a bolted Langevin-type echo sounder transducer by enabling low frequency operation with securing a sound pressure level above a certain level without changing the external dimensions of the echo sounder transducer. This is an echo sounder transducer includes a Langevin-type vibrator having a front mass and a rear mass, and a cylindrical active vibrator which is sandwiched between the front mass and rear mass, a bend vibrator constituted of a diaphragm arranged in an acoustic radiation surface section of the front mass of the Langevin-type vibrator, and a disc type active vibrator fixed to the diaphragm. This has such structure that a slit, communicating from an outer peripheral side face toward an axial center, is provided on the circumference in the side of the lower portion of the front mass of the Langevin-type vibrator toward the rear mass.
Owner:NEC CORP
Audio output apparatus and audio output method
ActiveUS20090214050A1Enhanced low frequencySmaller signal levelTransducer acoustic reaction preventionFrequency response correctionPitch shiftFrequency band
An audio output apparatus includes a masking band determining unit configured to determine a first frequency band in which masking due to environmental sounds is likely to occur in audio signal output sounds; a band-component extracting unit configured to extract a signal component from an input audio signal in the first frequency band determined by the masking band determining unit; a pitch shift unit configured to perform pitch shifting of the signal component in the first frequency band extracted by the band-component extracting unit and generate a pitch shift signal containing a signal component of at least a doubled frequency; and a signal output unit configured to supply an audio signal containing the pitch shift signal acquired by the pitch shift unit to a connected speaker.
Owner:SONY CORP
Compact antenna
InactiveUS20060176220A1Easy to adjustIncrease the frequency bandSimultaneous aerial operationsAntenna supports/mountingsMulti bandElectrical conductor
The multi-band antenna 1 is provided with a dielectric having the three-layer structure obtained by stacking layers so as that a central dielectric layer 12 made of a low dielectric constant material is sandwiched by lower and upper side dielectric layers 11, 13 made of high dielectric constant materials, a fed element 12 formed between the central dielectric layer 12 and the upper dielectric layer 13 and its base end being connected to a feed point on a specified side face of the dielectric having the three-layer structure, a grounded parasitic element 22 formed between the central dielectric layer 12 and the lower dielectric layer 11 and its base end being grounded on a specified side face, wherein the fed element 21 and the grounded parasitic element 22 is formed from the base end to the open end by a element obtained by connecting a plurality of line conductors and folding at least around the side face opposite to the specified face.
Owner:FURUKAWA ELECTRIC CO LTD
Amplifier circuit having improved linearity and frequency band using multiple gated transistor
InactiveUS7319364B2Increase the frequency bandImprove linearityAmplifier modifications to reduce non-linear distortionAmplifier modifications to reduce noise influenceUltrasound attenuationAudio power amplifier
Disclosed herein is an amplifier circuit having improved linearity and frequency band using a MGTR. The amplifier circuit comprises an amplification unit including a main transistor and an auxiliary transistor, an attenuation unit including inductors respectively connected to the source of the main transistor and the source of the auxiliary transistor, a capacitor connected at one end thereof to the sources of the main transistor and auxiliary transistor and connected at the other end thereof to the gates of the main transistor and auxiliary transistor, and an output unit connected to the drains of the main transistor and auxiliary transistor.
Owner:INTEGRANT TECH
Adaptive frequency prediction for encoding or decoding an audio signal
ActiveUS8532983B2Simple structureIncrease the frequency bandSpeech analysisDigital computer detailsFine structureFrequency spectrum
In one embodiment, a method of transceiving an audio signal is disclosed. The method includes providing low band spectral information having a plurality of spectrum coefficients and predicting a high band extended spectral fine structure from the low band spectral information for at least one subband, where the high band extended spectral fine structure are made of a plurality of spectrum coefficients. The predicting includes preparing the spectrum coefficients of the low band spectral information, defining prediction parameters for the high band extended spectral fine structure and index ranges of the prediction parameters, and determining possible best indices of the prediction parameters, where determining includes minimizing a prediction error between a reference subband in high band and a predicted subband that is selected and composed from an available low band. The possible best indices of the prediction parameters are transmitted.
Owner:HUAWEI TECH CO LTD
Amplifier circuit having improved linearity and frequency band using multiple gated transistor
InactiveUS20060091962A1Increase the frequency bandImprove linearityAmplifier modifications to reduce non-linear distortionAmplifier modifications to reduce noise influenceFrequency bandInductor
Disclosed herein is an amplifier circuit having improved linearity and frequency band using a MGTR. The amplifier circuit comprises an amplification unit including a main transistor and an auxiliary transistor, an attenuation unit including inductors respectively connected to the source of the main transistor and the source of the auxiliary transistor, a capacitor connected at one end thereof to the sources of the main transistor and auxiliary transistor and connected at the other end thereof to the gates of the main transistor and-auxiliary transistor, and an output unit connected to the drains of the main transistor and auxiliary transistor.
Owner:INTEGRANT TECH
Patch antenna
InactiveUS20120038529A1High design frequency bandSmall sizeElectrically short antennasSlot antennasFrequency bandLinear polarization
Owner:ACE TECH
Linear frequency modulation continuous wave radar transceiving front end
InactiveCN108459302ALow costHighly integratedWave based measurement systemsElectromagnetic couplingCircular disc
The invention discloses a linear frequency modulation continuous wave radar transceiving front end, and aims to provide a transceiving front end which is simple in structure, high in integration, small in size, and easy to realize integration in one step. According to the technical scheme, a transmitting antenna (4) and a receiving antenna (5) are integrated in the cylinder transmitting channel and the receiving channel of an upper cavity (1), wherein the transmitting channel and the receiving channel are symmetrical to the central axis, a radio frequency circuit (3) is installed in a disc cavity formed in the lower cavity cylinder, the radio frequency circuit (3) is used for carrying out the energy transmission with the transmitting antenna and the receiving antenna by means of electromagnetic coupling through the transmitting antenna and the receiving antenna, a waveform generator is used for inputting the generated modulation signal v (t) into a voltage-controlled oscillator in theradio frequency circuit 3, the voltage-controlled oscillator is used for modulating the modulation signal to a microwave frequency band, the generated frequency modulation signal is amplified throughmultiple times of frequency doubling and is used as a transmitting signal of the transmitting antenna to be transmitted out.
Owner:10TH RES INST OF CETC
Multi-frequency antenna and wireless communication device with same
InactiveCN101640307AIncrease the frequency bandImprove versatilitySimultaneous aerial operationsAntenna supports/mountingsEngineeringCommunication device
Owner:SHENZHEN FUTAIHONG PRECISION IND CO LTD +1
Phase shifter
InactiveUS20080297273A1Broaden frequency bandIncrease the frequency bandDelay linesWaveguidesEngineeringMicrostrip
A first microstrip line 100 transmits a predetermined input signal. A coupling line includes a gap 120 along a transmitting direction of the input signal, and the gap 120 forms a plurality of paths having different path lengths. The input signal is divided by the gap 120 into divided signals. The paths are electrically coupled to the first microstrip line 100 at a first region to transmit the divided signals. A second microstrip line 105 is provided in parallel with the first microstrip line and electrically coupled to the coupling line at a second region. The second microstrip line 105 transmits each of the divided signals transmitted through the coupling line.
Owner:HITACHI LTD
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