31 results about "Extremely high frequency" patented technology

The invention discloses a multi-unit sound production device, which comprises a plurality of sound production units and a passive sound production module, wherein at least one sound production unit is connected with a resonant cavity through a sound guide tube, and the resonant cavity is further connected to the passive sound production module to form an acoustic excitation path in which the low-frequency-band sound production unit drives the extremely-high-frequency-band passive sound production module; the plurality of sound production units and the passive sound production module are respectively connected to an auditory meatus outlet through respective sound guide tubes; the resonant cavity is arranged to be of a micro-cavity structure so as to be matched with the acoustic impedance of the passive sound production module in a specific extremely high frequency band response range. According to the invention, a cross-band acoustic feedback coupling mechanism is established by introducing a sound guide channel and a resonant cavity structure between the sound production unit and the passive unit, and dynamic regulation and control and frequency response optimization of frequency band sound energy are realized on the premise of not influencing normal output of an original active loudspeaker.

Techniques for improving acoustic wave device structures are disclosed, including filters, oscillators and systems that may include such devices. First and second layers of piezoelectric material may be acoustically coupled with one another to have a piezoelectrically excitable resonance mode. The first layer of piezoelectric material may have a first piezoelectric axis orientation, and the second layer of piezoelectric material may have a second piezoelectric axis orientation that substantially opposes the first piezoelectric axis orientation of the first layer of piezoelectric material. The first and second layers of piezoelectric material have respective thicknesses so that the acoustic wave device has a resonant frequency that is in a super high frequency band or an extremely high frequency band.

The invention discloses an integrated double-frequency composite ultrasonic transducer, a preparation method and a transdermal drug delivery method. The ultrasonic transducer comprises a high-frequency piezoelectric layer, a low-frequency piezoelectric layer, an epoxy support material and an electrode group, the high-frequency piezoelectric layer and the low-frequency piezoelectric layer are coaxially nested, the low-frequency piezoelectric layer is of a flat annular structure, the high-frequency piezoelectric layer is of a flat circular structure, the high-frequency piezoelectric layer is located in a circular ring of the low-frequency piezoelectric layer, and an annular insulation gap completely filled with an epoxy supporting material is formed between the high-frequency piezoelectric layer and the low-frequency piezoelectric layer; the electrode group comprises a high-frequency piezoelectric layer positive electrode located on the first surface of the high-frequency piezoelectric layer, a low-frequency piezoelectric layer positive electrode located on the first surface of the low-frequency piezoelectric layer and a common-ground negative electrode located on the second surface of the high-frequency piezoelectric layer and the second surface of the low-frequency piezoelectric layer, and the second surface of the high-frequency piezoelectric layer and the second surface of the low-frequency piezoelectric layer are located on the same plane. The double-frequency ultrasonic integration is realized, the transdermal drug delivery operation process is simplified, and the double-frequency ultrasonic integration device is more suitable for a transdermal drug delivery scene.

Techniques for improving Bulk Acoustic Wave (BAW) reflector and resonator structures are disclosed, including filters, oscillators and systems that may include such devices. First and second layers of piezoelectric material may be acoustically coupled with one another to have a piezoelectrically excitable resonance mode. The first layer of piezoelectric material may have a first piezoelectric axis orientation, and the second layer of piezoelectric material may have a second piezoelectric axis orientation that substantially opposes the first piezoelectric axis orientation of the first layer of piezoelectric material. A top acoustic reflector electrode may include a first pair of top metal electrode layers electrically and acoustically coupled with the first and second layer of piezoelectric material to excite the piezoelectrically excitable resonance mode at a resonant frequency of the BAW resonator. The resonant frequency of the BAW resonator may be in a super high frequency band or an extremely high frequency band.

The utility model relates to the technical field of fishing trousers processing, and discloses a fishing trousers seam closing and heat sealing device which comprises a mounting plate, a seam closing mechanism is arranged on the top of the mounting plate, a heat sealing mechanism is arranged on the left side of the seam closing mechanism, and supporting legs are fixedly connected to the bottom of the mounting plate. According to the sewing and heat-sealing device for the fishing trousers, the needle punctures up and down at extremely high frequency and is matched with the thread shuttle to ingeniously shuttle and lead the threads, the fishing trousers can be quickly and accurately sewn, compared with a traditional manual sewing mode, the electric operation greatly improves the sewing efficiency of the fishing trousers, a large amount of manpower is saved, and the labor intensity of workers is reduced. And under the combined action of certain pressure and temperature, molecules of the sewing parts of the fishing trousers or edge materials needing to be sealed are fused with one another, so that the purpose of heat sealing of the fishing trousers is achieved, the waterproof and windproof performance of the fishing trousers can be enhanced through heat sealing treatment, and the overall quality of the fishing trousers is improved.

A belt type high-pitch vibrating diaphragm forming device with an arc-shaped structure comprises a pressing device, a laser device, a folding device, a cutting device and a positioning device, and the laser device is used for cutting metal foil to form a metal circuit layer; the pressing device is used for hot-pressing the metal circuit layer to fit the metal circuit layer on the base layer; the folding device is used for folding the pressed product into a wave shape; the cutting device is used for cutting the wavy vibrating diaphragm into a required shape, and the positioning device is used for assembling and forming the wavy vibrating diaphragm and the outer frame; the vibrating diaphragm provided by the utility model has extremely high frequency response and excellent tone quality performance in performance. And the production cost can be saved in process manufacturing, the structural design of the shape of the product can also enable the product to have better sound listening performance, and a plurality of different materials and different product shapes can be combined and matched. The high-frequency ductility of the vibrating diaphragm is better, the distortion rate is lower, and the horizontal directivity is wide. And the product has the advantages of flexibility, diversification and customization.

The invention relates to a buried hill reservoir microfracture evaluation method based on array acoustic logging, and belongs to the technical field of oil-gas exploration and development. The method comprises the following steps: acquiring unipolar longitudinal wave velocity, high-frequency transverse wave velocity and dipolar low-frequency transverse wave velocity from array acoustic logging data; analyzing the sensitivity of the logging frequency band wave velocity with respect to the microfracture density and the aspect ratio by using a BISQ wave velocity dispersion model; carrying out anisotropy correction on the dipole shear wave velocity, and evaluating the micro-fracture development density according to the relative difference between the dipole shear wave velocity and the single-pole high-frequency shear wave velocity; and calculating cut-off frequencies of the unipolar and dipolar transverse wave measurement modes, and evaluating the aspect ratio of the microfracture according to the ratio of the relative difference of the wave velocities of the high and low frequency transverse waves to the difference value of the cut-off frequencies, namely the relative change rate of the transverse wave velocities. According to the method, the micro-fracture development density and the aspect ratio of the buried hill reservoir are represented through the transverse wave velocity difference and the change rate respectively, the uncertainty of a calibration link in a traditional method is effectively avoided, and the method has better applicability to the buried hill reservoir with high heterogeneity and complex lithology.

Techniques for improving structures, acoustic wave resonators, layers, and devices are disclosed, including filters, oscillators and systems that may include such devices. An acoustic wave device of this disclosure may comprise a substrate and a piezoelectric resonant volume. The piezoelectric resonant volume of the acoustic wave device may have a main resonant frequency. The acoustic wave device may comprise a first distributed Bragg acoustic reflector. The first distributed Bragg acoustic reflector may comprise a first active piezoelectric layer. The main resonant frequency of the Bulk Acoustic Wave (BAW) resonator may be in a super high frequency (SHF) band. The main resonant frequency of the Bulk Acoustic Wave (BAW) resonator may be in an extremely high frequency (EHF) band.

A first station (STA) receives, from an access point (AP) and via a first link, a beacon frame. Based on a receive signal strength indicator (RSSI) of the beacon frame being less than a threshold: the first STA detects a second frame transmitted via a second link by the AP to a second STA, and based on detecting the second frame the first STA transmits to the AP a third frame comprising a request to establish the second link between the first STA and the AP.

The invention discloses a conductor ultra wide band electromagnetic scattering simulation method based on a time domain discontinuous Galerkin integral equation. The method allows calculation of target electromagnetic scattering results from ultra-low frequency to extremely high frequency under non-conformal grid conditions while covering near-field and far-field electromagnetic fields. Specifically, the method is suitable for processing a wavelength structure with the electrical size range from 1 time to 10-8 times, and the problem of low-frequency numerical value collapse is effectively solved. Compared with a frequency domain discontinuous Galerkin electric field integral equation numerical method, the method has obvious advantages in ultra-wideband scattering analysis. In addition, the method can be easily integrated into the existing time domain discrete Galerkin electric field integral equation method. Compared with an existing order stepping (MOD) method, the method has remarkable advantages, and a valuable tool is provided for ultra-wideband electromagnetic scattering analysis under the non-conformal grid condition; a plurality of typical examples verify the accuracy and effectiveness of the method at the same time.

Measuring the coherence distance of a coherence light source operating in a very high frequency band. [Solution] The light to be measured is output from a coherence wavelength-swept light source, separated into signal light and reference light by a first optical coupler, and combined by a second optical coupler. These are then output as a first interference signal, a second interference signal, and a third interference signal, each with a phase difference of 120°. Each of these is detected by a photodetector. A correction matrix is ​​calculated in which factors related to the amplitude of the first and second optical couplers, the photoelectric efficiency of the photodetector, and the phase of the second optical coupler change over time. The phase difference between the signal light and the reference light is calculated using the first, second, and third interference signals and the correction matrix. The spectral width of the light is calculated using the phase difference, and the coherence distance of the light is calculated using the spectral width.

In one aspect, the disclosure relates to a super high frequency (SHF) or extremely high frequency (EHF) bulk acoustic resonator that includes a nanostructure, wherein the nanostructure includes a substrate, a three-dimensional structure disposed on the substrate, wherein the three-dimensional structure includes a planar structure including at least one nanocomponent and a matrix material contacting the nanocomponent on at least one side, the matrix material including an SiGe alloy or Ge. The disclosed bulk acoustic resonator operates at frequencies of from about 100 MHz to about 100 GHz, is capable of self-amplification upon application of direct current or voltage, and has a Q factor amplification exceeding 1. Also disclosed are methods for amplification of mechanical resonance in the disclosed bulk acoustic resonators and devices incorporating the bulk acoustic resonators.

A USB2.0 / 3.0 HUB using extremely high frequency microwave isolation, which includes a USB3.0 microwave transmitter and a USB3.0 microwave receiver. It uses extremely high frequency EHF (Extremely High Frequency) with a frequency range of 60GHz. The microwave communication between the two can be automatically negotiated through custom communication rules. The USB3.0 HUB at the USB3.0 microwave receiver can be simultaneously connected to four super high-speed USB3.0 terminal peripherals. During the USB3.0 microwave communication process, only the received USB3.0 electrical signals are converted from electrical to microwave and then back to electrical. Therefore, the USB3.0 signal is transparent during transmission using microwave transmission equipment, and while supporting USB3.0 devices, it can directly be backward compatible with USB2.0 / 1.1 / 1.0 devices.

The application discloses a downhole high-power long-distance radio wave perspective detection system, which comprises a digital resonant downhole electric wave transmitting module, adopts a digital DDS cooperating with a PWM transmitting technology, utilizes an extremely high frequency H-bridge transmitting circuit to realize a digital signal amplification and an efficient digital transmitting technology, and comprises a transmitting power adjusting module, a full-direction intelligent wave selecting module and the like. The transmitting power adjusting module comprises a transmitting current detecting circuit and a digital DCDC voltage boosting circuit, a CPU adjusts the transmitting voltage at the moment, a current detecting circuit detects the transmitting current (I) at the moment, power is continuously adjusted until the transmitting power reaches the maximum power, the full-direction intelligent wave selecting module adopts a full digital technology to accurately extract effective signals. The application has the advantages that more accurate measurement data can be provided, the resolution of a geological abnormal body is improved, engineering application tests are carried out, technical support is provided for long-distance mining working face internal structure detection, and mine safety and efficient production are ensured.

The invention relates to the technical field of medical equipment, and discloses ten-billion-hertz overclocking micro-seismic equipment which comprises a shell, an overclocking generating device is arranged in the shell, and an inner film is arranged at the end, located at the overclocking generating device, of the interior of the shell. Through the overclocking generation device, extremely high frequency waves with fixed frequency can be continuously and stably emitted, the energy range of the waves is close to the vibration energy level of molecular hydrogen bonds, the dynamic structure of water molecular clusters can be influenced, a hydrogen bond network of urate crystals can be loosened through the resonance effect, and dissolution of the hydrogen bond network is promoted; when gout is in acute attack, the activity of immune cells can be adjusted through extremely-high-frequency waves generated by the overclocking micro-vibration equipment, release of inflammatory factors is reduced, and the effect of relieving red, swollen and heat pain is achieved; the non-thermal effect is achieved through extremely-high-frequency waves generated by the overclocking micro-vibration equipment, the function of the inner wall of a blood vessel is affected, local blood circulation is promoted, and excretion of uric acid is accelerated.

1. Name of the Design Product: Extremely High Frequency Ultrashort Wave Therapeutic Apparatus. 2. Use of the Design Product: For relieving pain in the human body, improving blood circulation, and repairing damaged cells. 3. Design Key Points of the Design Product: Lies in the shape. 4. Picture or Photograph Most Indicating the Design Key Points: Perspective view. 5. The bottom view has no design key points, and the bottom view is omitted.

The present application relates to the field of vacuum electronics terahertz technology, and specifically discloses a reliability analysis design method for a terahertz folded waveguide traveling wave tube, which comprises an electron gun, a signal input window, a folded waveguide high-frequency structure, a signal output window, a collector, a high-frequency heat sink and a heat dissipation base, the electron gun is used for emitting an electron beam; the folded waveguide high-frequency structure generates terahertz radiation by reducing the interaction between the electromagnetic wave phase velocity and the electron beam; the signal input window and the signal output window are used for inputting and outputting signals; the collector is used for recycling and dissipating the energy of the electron beam after the interaction between the electron beam and the wave; and the high-frequency heat sink and the heat dissipation base are used for fixing the traveling wave tube; the simulation method provided by the present application performs a systematic reliability analysis on the whole traveling wave tube, which is different from the analysis of each component, and is helpful to find structural defects and solve problems, provides simulation analysis guidance for actual processing and assembly, improves the success rate of engineering tube production, reduces production cost and shortens the development cycle.

The utility model relates to radio engineering, including ultra-high frequency equipment and technology. It consists of rectangular waveguides, a ferrite element and a magnetizing device. In the ultra-high frequency circulator, the rectangular waveguides are connected to a circular waveguide through a soft connection, a ferrite core is placed inside the circular waveguide, and a solenoid is installed around the ferrite core to create a magnetic field. As a result, the device can be used in radar and radio navigation systems at the same time, including having more compact dimensions, less weight, higher performance, lower losses, and a 5% increase in the useful work factor.

An equalizer stage circuit includes a first transistor and a second transistor disposed in a differential configuration. The equalizer stage circuit also includes a first selectable path. The first selectable path includes: a first terminal coupled to an emitter or source of the first transistor; a second terminal coupled to an emitter or a source of the second transistor; a high frequency portion including a first plurality of high frequency RC time constant components connected in parallel between the first terminal and the second terminal; a first capacitor coupled to the first terminal; a second capacitor coupled to the second terminal; and a low frequency portion including a second plurality of low frequency RC time constant components connected between the first capacitor and the second capacitor.

Techniques for improving acoustic wave device structures are disclosed, including filters, oscillators and systems that may include such devices. First and second layers of piezoelectric material may be acoustically coupled with one another to have a piezoelectrically excitable resonance mode. The first layer of piezoelectric material may have a first piezoelectric axis orientation, and the second layer of piezoelectric material may have a second piezoelectric axis orientation that substantially opposes the first piezoelectric axis orientation of the first layer of piezoelectric material. The first and second layers of piezoelectric material have respective thicknesses so that the acoustic wave device has a resonant frequency that is in a super high frequency band or an extremely high frequency band.

The embodiment of the invention provides a dynamic space relation analysis method based on three-dimensional scene reconstruction, and belongs to the technical field of three-dimensional computer vision. The method comprises the following steps: constructing an initial scene model formed by a plurality of explicit three-dimensional geometric primitives, and constructing a spatial index data structure for organizing the primitives according to geometric and semantic attributes of the primitives; in a real-time operation stage, in response to the obtained new sensor data, locally updating the primitive subset corresponding to the currently moving object in the scene model, and synchronously updating the spatial index data structure; and receiving a query request containing semantic description, efficiently executing the request on the updated index, and generating an analysis result by firstly utilizing semantic positioning and then utilizing geometric attributes to determine a spatial relationship. According to the method, high-fidelity representation, real-time local updating and high-performance semantic query are combined, so that the system can accurately analyze a dynamic three-dimensional scene at extremely high frequency, and the autonomous navigation and safe obstacle avoidance capabilities of an unmanned aerial vehicle and a robot are remarkably improved.

The utility model discloses an electronic device and terminal. Electronic device includes terminal and function equipment. Terminal includes back and first antenna subassembly of setting in back, and first antenna subassembly works in very high frequency frequency band. Function equipment includes the abutting surface for abutting terminal and second antenna subassembly of setting in abutting surface, and second antenna subassembly works in very high frequency frequency band. When back sets up in abutting surface, first antenna subassembly and second antenna subassembly communication connection. Further can realize the ultrashort distance communication of low latency and high transmission rate, makes between terminal and function equipment can establish reliable transmission link.

The application relates to the technical field of automatic control of fluid systems, and discloses a parameter automatic adjusting method for low-temperature operation of a fluid system, which comprises the following steps: calculating a feedback deviation sequence according to a target set value and a feedback sampling value; isolating a slow-changing trend component and a fast component sequence through a parallel window queue; adjusting a hysteresis judgment threshold by using fluctuation energy of the fast component, and adjusting a short-period window length by using an absolute value of the slow-changing trend, so as to cooperatively judge a motion hysteresis state and a constraint level; searching for a gain correction coefficient to correct a control output when the state takes effect, and generating a driving control instruction. The application eliminates time-domain aliasing distortion of a signal, can accurately suppress extremely low-frequency physical sticking and extremely high-frequency phase change disturbance without adding external physical sensors, shortens system convergence time, suppresses overshoot, eliminates high-frequency limiting oscillation of a control loop near a balance point, and maintains adjusting quality.

Optoelectronic transducers that convert a femtosecond (fs)-timescale laser pulse into an a.c. electrical current pulse with an extremely high frequency and a high quality factor (Q) are provided. Both the frequency and amplitude of the a.c. electrical current pulse can be dynamically tuned by the application of a varying bias magnetic field. The optoelectronic transducers are based on a trilayered freestanding membrane that functions as both an acoustic cavity and a magnon cavity. The freestanding membrane includes an electrical conductor layer, a magnetic insulator layer, and a dielectric layer arranged in a vertical stack.

The present disclosure presents various techniques to improve phase-tracking reference signal (PTRS) performance with respect to extremely high frequency communications. According to some embodiments, enhanced power boosting may be applied to improve PTRS performance while still keeping the power spectral density (PSD) within the ETSI broadband radio access network (BRAN) limits. In some cases, the power boosting may be semi-static and / or dynamic. In other embodiments, improved performance may be achieved by dynamically changing the time and / or frequency density of the PTRS. In other embodiments, a multi-port configuration may be used for downlink PTRS. In other embodiments, one or more PTRS configurations may be determined based on the SCS and / or frequency band, e.g., based on the communication traffic type, channel priority, parameters signaled in the slot format indicator (SFI), etc. In other embodiments, a common phase error (CPE) estimate may be obtained for those OFDM symbols without PTRS by interpolating available PTRS estimates in the time domain.

Techniques for improving structures, acoustic wave resonators, layers, and devices are disclosed, including filters, oscillators and systems that may include such devices. An acoustic wave device of this disclosure may comprise a substrate and a piezoelectric resonant volume. The piezoelectric resonant volume of the acoustic wave device may have a main resonant frequency. The acoustic wave device may comprise a first distributed Bragg acoustic reflector. The first distributed Bragg acoustic reflector may comprise a first active piezoelectric layer. The main resonant frequency of the Bulk Acoustic Wave (BAW) resonator may be in a super high frequency (SHF) band. The main resonant frequency of the Bulk Acoustic Wave (BAW) resonator may be in an extremely high frequency (EHF) band.

The application belongs to the field of analog integrated circuits, and particularly relates to a wide-swing gain-extensible folded cascode floating inverting amplifier. The application adopts a differential structure, and each energy storage capacitor provides independent power supply for an input transistor pair and a cascode transistor pair, breaks through the limitation of a traditional laminated structure, and provides a mutual decoupling and extremely abundant voltage margin for the input transistor pair and the output cascode transistor pair. Through capacitor suspension power supply, each layer of transistor can obtain sufficient transient bias in a low-voltage environment, so that a differential signal with high DC gain and large swing is constructed at the output end. Meanwhile, by using the pole distribution law of a single-stage folding topology, the main pole is locked at the output high resistance node, and the non-main pole is pushed to an extremely high frequency band, so that the gain accuracy, dynamic output range and loop stability are deeply optimized.

The invention discloses a frequency spectrum optimization calculation method based on a single-bit frequency measurement technology, which is based on a weighted stacking single-bit DFT (Discrete Fourier Transform) algorithm and is characterized in that sampling signals are cached and then are split bit by bit. Each split single-bit signal is calculated through an optimized Fourier transform module, and windowing operation is executed after twiddle factors are quantized. And frequency information is extracted from a final result through a spectrum analysis module. In combination with a multi-bit data splitting and superposition method, a single-bit frequency measurement technology and a twiddle factor windowing method, efficient and rapid frequency measurement can be realized in a multi-bit sampling system. According to the method, the advantages of multi-bit signals and the simplification characteristic of single-bit frequency measurement are combined, the extremely high frequency measurement speed is guaranteed, and meanwhile the computing resources and the frequency spectrum performance are optimized.