136 results about "Wave resonance" patented technology

Spiral coils generate very powerful electromagnetic fields by operating with two different but simultaneous resonant behaviors. Quarter-wave resonance is established by adjusting the frequency (and wavelength) of a radiofrequency (RF) voltage source until the length of the spiral conductor is equal to ¼ of the wavelength of the alternating voltage. This generates an electromagnetic standing wave with at least one peak node and at least one null node. Inductive-capacitive (L / C) resonance is established by optimizing the thickness and width of the wire ribbon used to make the spiral coil. When inductance and capacitance are balanced, the current response will synchronize with the voltage input, creating in-phase behavior, minimal total impedance, and maximal power output. If two such coils are placed near each other, they will create an extremely powerful electromagnetic field between them, which can promote chemical and plasma reactions involving charged particles such as ions or plasma particles, possibly including nuclear fusion reactions.

An antenna has a patch with a rear edge provided with a short circuit enabling a quarter-wave resonance to be established. A half-wave resonance can also be established between two lateral edges of the patch. The same coupling device couples the antenna to a transmitter or receiver for each of the two resonant frequencies. It includes a coupling strip penetrating the patch between the edges of a slot extending from one lateral edge. The antenna is particularly applicable in dual mode mobile telephone system using GSM and DCS standards.

A power amplifier comprises a power amplification stage and an impedance transformation stage. The power amplification stage is connected with the impedance transformation stage in series. A differential cascade circuit structure is adopted in the power amplification stage, and the impedance transformation stage is formed by connecting a three-level parallel resonance network, a fundamental wave resonance network and an L-type impedance transformation network in series. The power amplifier has a linear configurable mode and a non-linear configurable mode, the working frequency range covers 0.1GHz to 1.5 GHz and optimization of linearity and efficiency can be realized through flexible configuration under different scenes.

A sensing method and apparatus using photonic band gap multilayered material. Photonic band gap multi-layers are formed from alternating layers of higher refractive index and lower refractive index materials, and may be deposited or disposed on a optically transparent substrate or a reflecting face of a prism. Light is directed into the prism, directed to the photonic band gap multilayer, and reflected out of the prism, where it is captured and analyzed. Various sensor configurations keep light wavelength or coupling angle fixed, while monitoring the change in the other parameter. Also disclosed is a microarray configuration with an array of probe spots placed on one surface of the multilayer, which is mounted on an x-y translation stage. Also disclosed is a configuration where a cylindrical lens focuses an expanded and collimated light beam to a line that transects the rows of array elements sequentially, producing an image with shifted surface electromagnetic wave modes for each row, corresponding to individual elements of the array row.

An antenna has at least one slotted planar element. The slot in the planar element is open at one end and configured such that the planar element has a quarter wave resonance mode at a first frequency and there is a second resonant frequency at which the element has a 3 / 4 wave resonance mode and / or the element's slot has a quarter wave resonance mode. The second frequency is not substantially three time the first frequency. Multiple slotted elements may be employed to achieve increased bandwidth.

A sensing method and apparatus using photonic band gap multilayered material. Photonic band gap multi-layers are formed from alternating layers of higher refractive index and lower refractive index materials, and may be deposited or disposed on a optically transparent substrate or a reflecting face of a prism. Light is directed into the prism, directed to the photonic band gap multilayer, and reflected out of the prism, where it is captured and analyzed. Various sensor configurations keep light wavelength or coupling angle fixed, while monitoring the change in the other parameter. Also disclosed is a microarray configuration with an array of probe spots placed on one surface of the multilayer, which is mounted on an x-y translation stage. Also disclosed is a configuration where a cylindrical lens focuses an expanded and collimated light beam to a line that transects the rows of array elements sequentially, producing an image with shifted surface electromagnetic wave modes for each row, corresponding to individual elements of the array row. Further disclosed is a PBG multilayer with a periodic grating structure in or on the terminating layer.

This invention relates to one non-contact radio frequency label without source and its read system, wherein the radio frequency label comprises radio frequency wave signal source, antenna match circuit and radio antenna; the radio signal source adopts space multi-mode resonance structure composed of space wave resonance chamber, sound couple layer, bottom electrode, pressure electric film, insulation layer and top electrode; the said read system comprises reader and reader antenna; the reader is in charge for radio label inquire signal emission and radar receive and transmission.

This invention discloses one lithium ion car emergency starting power which comprises one limit charging device composed of voltage protective circuit, integral filter wave resonance circuit, stable circuit and voltage and electrical control circuit with one charging plug and one battery set, wherein, the set has one positive and negative electrode columns with discharging protector; the said set has one plug and wire clamper with one pair of crab left and right parts through bolt; the clamper is located with torque adjusting device set with double speed conductivity wire.

The invention provides a small broadband circular polarized antenna working in odd and even modes. The antenna comprises a metal oscillator, a feed layer and two metal probes. An open circuit groove and two feeding points are arranged in / on the metal oscillator. When common-mode feeding is performed on excitation signals, a plane reverse F antenna mode can be stimulated. When difference-mode feeding is performed on the excitation signals, a groove antenna mode can be stimulated. Through the polarization orthogonality of the two working modes, the feeding layer provides 90 degrees of phase difference to excitation signals in the common-mode and the difference mode, so radiation characteristics of the broadband circular polarization can be obtained. The antenna is advantaged in that 1) through one short circuit metal oscillator with an open groove, two kinds of quarter-wave resonance modes of orthogonal polarization are generated; and 2), the two working modes share a radiation mouth face, so the utilization rate of the mouth rate is improved. According to the invention, small, low-profile, broadband, high-efficiency and low-cost circular polarization characteristics can be achieved.

Retractable antennas with quarter wave-quarter wave resonances for telephones, and which are particularly suitable for radiotelephones, include a retractable antenna with a top load element, a spatially separated rod element, and a cylindrical support conductor positioned therebetween. The cylindrical support conductor is structurally configured to receive a portion of the rod therein to add structural rigidity to the antenna and to define a coaxial capacitor between the rod and the conductor when the antenna is in the extended position.

Lower layer of metal film, organic polymer film, and upper layer of metal film of modulator are plated on up surface of substrate. Lower and upper films and polymer film constitute double-sided metal cladding waveguide structure. The upper layer film and polymer film constitute structure of attenuated total reflectance. The method includes steps: preparing modulator; using laser signal irradiates up surface of the upper layer film directly; when incident angle reaches mode-matching angle, guided wave resonance occurs so as to excitate guided wave traveled inside polymer film; drawing curve between reflected light intensity and varying angle; selecting mode-matching angle of producing guided wave resonance as working point of modulator; applying electric signal to lower and upper films to modulate incident laser signal; detecting reflected laser signal, and displaying the signal on oscilloscope. Features are: low voltage, cost, insertion loss and easy of integration.

The invention provides a device which comprises a solar photovoltaic generating unit, an electromagnetic wave resonance label detecting unit, a non-contact IC card unit, a wireless access public internet unit and an LCD TV advertisement broadcast network, wherein the solar photovoltaic generating unit supplies power; the electromagnetic wave resonance label detecting unit recognizes a shopping bag; the non-contact IC card unit records transaction information; the wireless access public internet unit transmits a command of a control center and transfers transaction data and the state data of a collector; the LCD TV advertisement broadcast network simultaneously broadcasts public service and commerce advertisements; and the electromagnetic wave resonance label detecting unit, the non-contact IC card unit and the wireless access public internet unit are spliced into a VMC or an industrial control board to form system work. The invention controls the white pollution from the source, reduces the energy consumption of the production of the shopping bag, improves the utilization rate of the shopping bag, can bring convenience to manufacturers and consumers, can propagandize public services in a community and promotes the construction of harmonious society.

The invention relates to a prism SPR (Surface Plasma wave Resonance) high-sensitivity fiber liquid refractive index sensor, which is mainly characterized in that a laser light is coupled to a Y-shaped polarization-maintaining fiber coupler by a P-laser polarizer and a polarization-maintaining fiber collimator; the SPR is excited twice by the laser light outgoing from a sensing light branch polarization-maintaining fiber collimator; the reflection light reaches a sensing light branch optical-to-electrical converter after the two times of SPR excitation; a laser light outgoing from a reference light branch fiber collimator is coupled to a reference light branch optical-to-electrical converter; the light signals are converted into electrical signals by the reference light branch optical-to-electrical converter and the sensing light branch optical-to-electrical converter; the electrical signals are transmitted to an amplifier and an A / D converter; and the converted digital signals are transmitted to a data processing device for data processing. The invention has a simple structure, reduces the energy loss of P-laser, improves the signal-to-noise ratio and the sensitivity and allows long-distance application.

A BAW resonator includes a piezoelectric layer with a first surface and a second surface opposing the first surface, a first electrode disposed on the first surface of the piezoelectric layer, a second electrode disposed on the second surface of the piezoelectric layer, a substrate, and an acoustic reflector disposed between the substrate and the second electrode, the acoustic reflector comprising a plurality of layers from a material with high acoustic impedance and from a material with low acoustic impedance, wherein areas with layers with high acoustic impedance and areas with layers with low acoustic impedance are alternately adjacently disposed. A performance of the acoustic reflector is determined by its reflectivity for a longitudinal wave existing in the BAW resonator at the resonance frequency of the BAW resonator and by its reflectivity for a shear wave existing in the BAW resonator at the resonance frequency of the BAW resonator. The layers of the acoustic reflector and layers disposed between the acoustic reflector and the piezoelectric layer are selected, with reference to their number, material, and thickness, such that the transmissivity for the longitudinal wave and the transmissivity for the shear wave in the area of the resonance frequency is smaller than -10 dB.

The invention discloses a vector magnetic nozzle used for electric propulsion. The vector magnetic nozzle is composed of a permanent magnet arranged in front of a plasma flame-spraying nozzle and a plurality of non-concentric coils which are arranged at the back of the nozzle and form a dipole field. The permanent magnet and the non-concentric coils form a double-magnetic mirror tube so that plasmas can be in reciprocating motion in the double-magnetic mirror tube. The plasmas are heated in effect of ion cyclotron wave resonance under current modulation of the non-concentric coils. Proportion of current on the plurality of non-concentric coils when the plasmas are released from the magnetic nozzle is adjusted so that the vector direction of an external magnetic field of the plasma flame-spraying nozzle of a propeller deviates from the central axis of the propeller so as to guide the flow direction of external plasmas and further to change the thrust vector direction of the propeller. The vector magnetic nozzle can greatly reduce the quantity of the propellers of an attitude control system through vector propulsion, simultaneously greatly improves reliability of the attitude control system, enables vertical speed of the plasmas to be converted to parallel speed, improves parallel flow rate of external flow plasmas, and achieves the purpose of increasing thrust.

Spiral coils generate very powerful electromagnetic fields by operating with two different but simultaneous resonant behaviors. Quarter-wave resonance is established by adjusting the frequency (and wavelength) of a radiofrequency (RF) voltage source until the length of the spiral conductor is equal to ¼ of the wavelength of the alternating voltage. This generates an electromagnetic standing wave with at least one peak node and at least one null node. Inductive-capacitive (L / C) resonance is established by optimizing the thickness and width of the wire ribbon used to make the spiral coil. When inductance and capacitance are balanced, the current response will synchronize with the voltage input, creating in-phase behavior, minimal total impedance, and maximal power output. If two such coils are placed near each other, they will create an extremely powerful electromagnetic field between them, which can promote chemical and plasma reactions involving charged particles such as ions or plasma particles, possibly including nuclear fusion reactions.

The invention relates to an optical fiber surface plasma wave nucleic acid sensor and method for detecting polymorphism of nucleotide. The system includes wideband lamp house, P type Polaroid, gamma type optical fiber coupler, coupler interface, sensing optical fiber, detector of terminal reflective optical fiber surface plasma wave resonance biology sensor, spectrum device and computer. The invention uses terminal reflective optical fiber surface plasma wave nucleic sensor detector and distributed optical fiber surface plasma wave nucleic sensor detector to realize the detection of polymorphism of nucleotide. Compared with spectrum detection method, the accurate value of resonance spectrum wavelength of the surface plasma wave can be acquired. The invention needs not to be signed, and it has no damage to the sample.

The invention discloses an intelligent variable pitch system for inhibiting the waving resonance of a wind turbine based on SMA differential pressure feedback. The wind turbine, a signal transmittingand processing device, a variable pitch control device and a variable pitch executing device are included; shape memory alloy SMA materials are laid on the upper layer and the lower layer of wind turbine blades, and the SMA materials located between the upper layer and the lower layer on the same blade are connected through a guide wire; when the wind turbine blades generate the waving displacement of the tip portions of the blades, the SMA material arranged between the upper layer and the lower layer generates differential pressure, and a voltage signal is output; the signal transmitting andprocessing device processes the voltage signal, the processed voltage signal is transmitted to the variable pitch control device; the variable pitch control device judges the processed voltage signaland sends a control instruction to the variable pitch control device according to the judging result; and control over the variable pitch angle of the wind turbine blades is achieved. By means of thesystem, hysteresis of resonance inhibiting of the wind turbine blades can be reduced, the conducting process of waving resonance detection is simplified, and the sensitivity and the accuracy of wavingresonance detection are improved.

The present invention belongs to the field of optoelectronic communication and optical information treatment. In the modulator, upper metal film, photoelectric polymer film, isolating layer and lower metal film are plated successively onto the lower surface of the prism; the upper and the lower metal film and the photoelectric polymer film constitute double-sided metal coated waveguide structure; the prism, the upper metal film and the photoelectric polymer film constitute the attenuating total-reflection structure; and the excited guide wave propagates inside the photoelectric polymer film. The modulation method includes constituting the said modulator, using semiconductor laser as laser light source, producing guide wave resonance mode, looking for corresponding sync angle to make the incident angle of laser beam to the bottom of the prism equal to the sync angle, and receiving reflected laser beam with detector to realize multiplex light modulation.

A sensing method and apparatus using photonic band gap multilayered material. Photonic band gap multi-layers are formed from alternating layers of higher refractive index and lower refractive index materials, and may be deposited or disposed on a optically transparent substrate or a reflecting face of a prism. Light is directed into the prism, directed to the photonic band gap multilayer, and reflected out of the prism, where it is captured and analyzed. Various sensor configurations keep light wavelength or coupling angle fixed, while monitoring the change in the other parameter. Also disclosed is a microarray configuration with an array of probe spots placed on one surface of the multilayer, which is mounted on an x-y translation stage.

A preparation method for a strong-adhesion-force carbon nanotube flexible transparent conductive thin film is characterized by carrying out pretreatment of nitric acid soaking, water washing and air drying in sequence on a polyethylene terephthalate (PET) base; and taking the PET which is subjected to the pretreatment as the base and spraying carbon nanotube solution to prepare the carbon nanotube flexible transparent conductive thin film FTCFs. The specific steps of spraying the carbon nanotube solution to prepare the carbon nanotube flexible transparent conductive thin film FTCFs are as follows: heating a heating plate placed with the PET to a pre-spraying temperature of 60-90 degrees; spraying at a low speed for 10-20 times; then, raising the temperature to 100-130 degrees; and spraying at a high speed for 30-50 times to prepare the FTCFs. With the preparation method, the adhesion force of SWCNTs on the PET can be effectively improved; an ultrasonic wave resonance method also provides an effective way for detecting the adhesion force of the FTCFs; and besides, the operation process is simple, no pollution is caused, the method is easy to realize, and the effect is obvious.

Disclosed is an electromagnetic wave absorber using a dielectric loss sheet, a method for forming the electromagnetic wave absorber, and a rotary blade for a wind turbine having an electromagnetic wave function using same. The electromagnetic wave absorber using a dielectric loss sheet comprises: a support layer for ensuring a resonance cavity for electromagnetic waves; a highly conductive backing layer formed on the back surface of the support layer; and a dielectric-loss composite sheet layer which is arranged on the front surface of the support layer, and which has a complex dielectric constant for generating a resonant peak with the electromagnetic wave reflected from the highly conductive backing layer.

Embodiments of the invention provide a method for calculating material impedance inside and outside casing pipe, a method for determining a relationship between material impedance inside and outside casing pipe and Lamb wave attenuation, a method for determining a relationship between material impedance inside and outside casing pipe and resonance wave resonance efficiency, a method for evaluatingwell cementation quality, and a computer device. The method for calculating the material impedance inside and outside casing pipe includes: setting a Lamb wave measurement device and a resonance wavemeasurement device to point to a same position inside the casing pipe, to obtain a Lamb wave attenuation measurement value and a resonance wave resonance efficiency measurement value; and obtaining avalue of the material impedance inside and outside the casing pipe through calculation according to the Lamb wave attenuation measurement value and a predetermined first function relationship betweenthe material impedance inside and outside the casing pipe and the Lamb wave attenuation, and according to the resonance wave resonance efficiency measurement value and a predetermined second functionrelationship between the material impedance inside and outside the casing pipe and the resonance efficiency. The solution in the embodiments of the invention improves accuracy of inversion of the material impedance after the casing pipe, and can simultaneously calculate acoustic impedance of a fluid material in the casing pipe.

The invention discloses a laser welding device, which comprises a fundamental wave resonance cavity, a harmonic resonance cavity, a control unit and a coupling device. The fundamental wave resonance cavity is used for generating a first laser beam with variable pulse widths and a fundamental wave length, the harmonic resonance cavity is used for generating a second laser beam with variable pulse widths and a harmonic wave length, the control unit is used for controlling respective laser power supplies of the fundamental wave resonance cavity and the harmonic resonance cavity and further controlling the laser emitting sequence of the fundamental wave resonance cavity and the harmonic resonance cavity, so that emission of the second laser beam is slightly prior to emission of the first laser beam, and the coupling device is used for coupling the first laser beam and the second laser beam which are focused on a workpiece to be welded through the same focusing lens. By the aid of the laser welding device, metal and alloy with high reflection coefficient can be effectively welded.

The invention relates to a higher harmonic wave resonance and transient overvoltage suppression device for an AC traction electric network of an electric railway, which comprises a circuit breaker, an isolating switch, a capacitor, a resistor, a reactor and relay protection equipment, wherein a second-order damping filter circuit is normally arranged in a subzone at the end of a feeding section or in the middle thereof; when the suppression device is used in the 25 KV traction electric network, the second-order damping filter circuit is arranged between a contact system (T) and a steel rail (R), and when the suppression device is used in the 2 is multiplied by 25 KV traction electric network with an autotransformer (AT) power supply, the two second-order damping filter circuit are used, one is arranged between the contact system and the steel rail, the other one is arranged between a positive feeder (F) and the steel rail, and parameters thereof are identical. The invention can suppress and damp the higher harmonic wave resonance and transient overvoltage by changing a topological structure and the network parameters of the traction electric network, and all the resistor, the capacitor and the inductor elements are passive, so that control equipments are not required. The invention has the advantages of simple structure, low equipment capacity, and free of maintenance.

The embodiment of the invention provides an indium antimonide thin film terahertz metasurface and a thermal tuning method and preparation method thereof. The terahertz metasurface is arranged to be ofa three-layer structure comprising a rectangular substrate layer, a column array structure layer and an indium antimonide thin film so that the dielectric constant of the indium antimonide thin filmcan be changed along with temperature change, and the resonance frequency of the terahertz metasurface is changed. Therefore, the terahertz metasurface can change the resonance frequency by changing the temperature, and meanwhile, the tuning range of the terahertz wave resonance frequency is enlarged. The terahertz metasurface is simple in preparation method and suitable for being widely applied to the field of photoelectric manufacturing, so that the application range of the terahertz metasurface is widened.

The invention discloses a sensor based on a self-supporting grating structure. The sensor comprises a self-supporting dielectric grating, and a metal grating formed on the dielectric grating. The sensor is characterized in that the variation of refractive index of a sample to be detected is detected through a transmission absorption peak produced by the guided wave resonance caused by the metal grating and dielectric grating under the irradiation of a plane wave. The self-supporting grating structure of the sensor is manufactured by the nano processing technology. The variation of the refractive index of the sample to be detected can be detected through the transmission absorption peak produced by the guided wave resonance caused by the metal-dielectric grating under the vertical radiation of a light. The sensor with a periodic nano structure is small in size and easy to carry; the self-supporting grating structure is adopted, so that the manufacture process and the testing method are simple, and the sensitivity is high.

The invention provides a via anti-pad layout method, device, a PCB and a via anti-pad manufacturing device. The method comprises the step in which a layout device selects a corresponding PCB differential signal via anti-pad size when a quarter-wave resonance frequency of the PCB differential signal via is equal to a set frequency as the minimum PCB differential signal via anti-pad size. Accordingto the via anti-pad layout method, the device, the PCB and the via anti-pad manufacturing device, through the design of the differential signal via anti-pad, stub effects of the PCB differential signal via can be effectively solved, the PCB design and processing difficulty is reduced, the PCB processing cost is greatly reduced, and the PCB design and processing efficiency is improved.

The present invention relates to an electromagnetic wave reflection surface capable of implementing high directionality and multiband which can be used as electromagnetic wave resonance surface material for making antenna baseplate design and microwave circuit isolation. It is characterized by that the upper surface of said surface is formed from two different resonant units which are arranged according to the periodic or quasi-periodic structure mode, and every resonant unit is formed from metal paster and metallized guide hole connected with metal lower baseplate, and every resonant unit has respective different resonant frequency.