30 results about "Resonator" patented technology

A compact plasma generating apparatus providing high efficiency of plasma excitation is presented. A plasma generating apparatus (100) comprises a microwave generating apparatus (10) for generating microwaves, a coaxial waveguide (20) having a coaxial structure comprising an inner tube (20a) and an outer tube (20b), a monopole antenna (21) being attached to one end of said inner tube (20a), for directing the microwaves generated by said microwave generating apparatus (10) to the monopole antenna (21), a resonator (22) composed of dielectric material for holding the monopole antenna (21), and a chamber (23) in which a specific process gas is fed for plasma excitation. The chamber (23) has an open surface and the resonator (22) is placed on this open surface, and the process gas is excited by the microwaves radiated from the monopole antenna (21) through the resonator (22) into the interior of the chamber (23) to generate plasma.

As an aspect of the present invention, a noncontact power feeding apparatus includes: a power transmission resonator; and a power reception resonator configured to be magnetically coupled with the power transmission resonator by magnetic field resonance. The power transmission resonator is magnetically coupled with the power reception resonator by the magnetic field resonance, whereby electric power is supplied from an electric power source to the power reception resonator through the power transmission resonator. One of the power transmission resonator and the power reception resonator has a predetermined single resonant frequency, and the other one of the power transmission resonator and the power reception resonator has multiple resonant frequencies inclusive of the predetermined single resonant frequency.

A microelectromechanical structure and device and methods of forming and using the structure and device are disclosed. The structure includes a mechanical element, an ion conductor and a plurality of electrodes. Mechanical properties of the structure are altered by applying a bias across the electrodes. Such structures can be used to form devices such as resonators for RF applications.

A wireless energy transfer system may include a first layer of conductive material that may be positioned proximate to a second layer. The second layer of magnetic material may be positioned proximate to the first layer of conductive material and a third layer. The third layer may be positioned proximate to the second layer and a fourth layer, wherein the third layer may include a first resonator coil, wherein the first resonator coil may be configured to transfer wireless energy to a second resonator coil when the second resonator coil is proximate to the first resonator coil. The fourth layer may be positioned proximate to the third layer, wherein the fourth layer may include a plurality of conductive material.

A piezoelectric substrate and interdigital electrode portions are covered with an insulating layer with an insulating thin film interposed therebetween. The piezoelectric substrate is made of LiTaO₃ and the insulating thin film and the insulating layer are made of silicon oxide. By intentionally making the upper surface of the insulating layer flat, the deterioration of propagation efficiency of surface acoustic waves can be suppressed, so that it is possible to reduce increase in insertion loss of a resonator. Since the upper surface of the insulating layer is flat, it is also possible to reduce variation in resonant frequency and anti-resonant frequency due to the temperature change of the surface acoustic wave device.

A piezoelectric device includes a base substrate constituting the bottom of the package; a framed resonator element layered on the base substrate; and a lid for hermetically sealing a space within the package, the lid being layered on the framed resonator element. The framed resonator element includes a frame constituting a wall surrounding the space within the package; a base having a predetermined width, which is integrally formed inside the frame; a plurality of resonating arms that extend in parallel to each other from the base in one direction in the frame; first cutouts that are provided near the base ends of the resonating arms in the base; and second cutouts formed at the joint between the base and the frame.

A fabrication process produces markers for a magnetomechanical electronic article surveillance system. The marker includes a magnetomechanical element comprising one or more resonator strips of magnetostrictive amorphous metal alloy; a housing having a cavity sized and shaped to accommodate the resonator strips for free mechanical vibration therewithin; and a bias magnet to magnetically bias the magnetomechanical element. The process employs adaptive control of the cut length of the resonator strips, correction of the length being based on the deviation of the actual marker resonant frequency from a preselected, target marker frequency. Use of adaptive, feedback control advantageously results in a much tighter distribution of actual resonant frequencies. Also provided is a web-fed press for continuously producing such markers with adaptive control of the resonator strip length.

The semiconductor laser of the present invention includes a first conductivity-type cladding layer, a second conductivity-type cladding layer having at least one ridge structure extending in the direction of a resonator, an active layer disposed between the two cladding layers and a current blocking layer provided so as to cover at least a side face of the ridge structure. The current blocking layer includes a hydrogenated first dielectric film. In the structure having the current blocking layer formed of a dielectric, a light confining efficiency is enhanced, a threshold value of laser oscillation decreases, and current properties during the oscillation at a high temperature and with a high power are improved.

The invention discloses a noise reducing structure of a gasoline engine intake system, which is characterized in that the structure body is in a diversion structure, and the diversion structure is arranged in an S area after a valve plate of the gasoline engine intake system and before an interface between an inlet channel and a resonator cavity; and the gasoline engine intake system comprises a throttle body, an intake manifold connected with the throttle body, and a throttle body valve plate which is arranged in the channel between the throttle body and the intake manifold. The noise reducing structure of the gasoline engine intake system has the main advantages of simple structure, strong noise reducing capability and low cost, mostly reducing the 'swoosh' intake howling produced when an engine accelerates suddenly, clarifying the position and the optimal structure of the noise reducing and diversion structure through CAE analysis, conducting most refined optimization on a traditional intake system, and achieving higher noise reducing effect; and the diversion structure can be mostly directly integrated with the traditional intake system for design and production, and does not affect the performance, the assembly and the reliability of the engine.

The invention provides a piezoelectric acoustic wave resonator. The shape of an effective working area of the piezoelectric acoustic wave resonator is a polygon, a first side and a second side in theeffective working area correspond to an input side and an output side of the piezoelectric acoustic wave resonator respectively, and an outer frame of the effective working area is defined as a rectangle which can surround the effective working area and has the smallest area where one side coincides with the first side or the second side; one side of the outer frame that coincides with the first side or the second side has a first length, one side of the outer frame that is perpendicular to the side has a second length, and the ratio range of the first length to the second length is 1-4; and the ratio range of the sum of the lengths of the first side and the second side to the circumference of the effective working area is 0.4-0.7, wherein the ratio ranges of the lengths of the first sideand the second side to the circumference of the effective working area are both 0.2-0.35. The invention also provides a piezoelectric acoustic wave filter, a duplexer and a radio frequency communication module. Through the implementation of the invention, the electrical transmission loss of the piezoelectric acoustic wave resonator can be improved, and the insertion loss of the piezoelectric acoustic wave filter can be further improved.

A band pass filter includes a longitudinally coupled resonator elastic wave filter on a piezoelectric substrate and parallel arm resonators at parallel arms, each connected between a series arm connecting an antenna terminal and a receiving terminal and one of ground terminals. The parallel arm resonators include a first parallel arm resonator having the highest resonance frequency among the parallel arm resonators and a second parallel arm resonator. A second ground terminal that is one of the ground terminals connected to the second parallel arm resonator and a third ground terminal that is one of the ground terminals connected to the longitudinally coupled resonator elastic wave filter are connected to each other. A first ground terminal that is one of the ground terminals connected to the first parallel arm resonator is not connected to the second or third ground terminals.

A characterization method for the solubility of ionic liquid is applied under atmospheric pressure for testing the function among ionic liquid and gas/gas molecules of volatile organic solvent, which is characterized by comprising: using an object ionic liquid as the sensitive film coat material of a resonator induction zone of a mass sensitive piezoelectric crystal detector; coating an ionic liquid film on the surface of the resonator induction zone; detecting the frequency change of the detector before and after acting with researched gas molecules to represent the function between the researched ionic liquid and the gas. The ionic liquid characterization method can obtain the solubility of ionic liquid in gas/volatile organics, and thermodynamic parameters as enthalpy, entropy, free energy change and the like in dissolution; and can research the function approach between ionic liquid and gas molecules. The measurement method is simple, fast and reliable, which can accelerate the development and application of ionic liquid.

For testing an RF device, such as an RF receiver/decoder chip that receives an RF signal via an antenna terminal and outputs a digital code at an output terminal, an inexpensive non-RF programmable tester is used. The programmable tester is a commercially available tester that need only generate and receive non-RF digital and analog signals. The RF signals needed for the testing of the RF device are totally supplied by RF generators on a single printed circuit board, external to the commercial tester housing. The board contains controllable RF generating circuitry whose possible output amplitudes and frequencies need be only those necessary for testing the particular DUT. The frequencies may be changed by switching in different crystal resonators mounted on the board.

A frequency tunable filter and an associated apparatus are provided, wherein the frequency tunable filter may include a plurality of ports including an input port and an output port, and may further include an inductor-capacitor (LC) resonator, a switching unit that is coupled between the LC resonator and a ground terminal of the frequency tunable filter, and a resonance adjustment unit that is coupled between the LC resonator and the ground terminal. For example, the LC resonator may include a first terminal coupled to each of the input port and the output port, and may further include a second terminal, the switching unit may selectively provide a conduction path between the second terminal of the LC resonator and the ground terminal, and the resonance adjustment unit may selectively change a resonance characteristic of the LC resonator. According to the present invention, the overall performance of an electronic device is guaranteed.

The present application provides a wet gas compression system for a wet gas flow having a number of liquid droplets therein. The wet gas compression system may include a pipe, a compressor in communication with the pipe, and a thermoacoustic resonator in communication with the pipe so as to break up the liquid droplets in the wet gas flow.

The invention discloses a microstrip line Butler matrix provided with a bandpass filtering characteristic and based on stub-loaded resonators. The microstrip line Butler matrix comprises four stub-loaded resonators, two input end feed line heads, two output end feed line heads and four port feed lines. Each resonator is electrically or magnetically coupled with another two resonators, and a phase shift characteristic is realized by means of the combination of electric coupling and magnetic coupling paths. According to the invention, 3dB couplers are replaced by the stub-loaded resonators, the structure is simple, and the bandpass filtering characteristic is realized; the phase shift characteristic is realized by means of the combination of electric coupling and magnetic coupling paths, a phase shifter is omitted, a relatively good isolation degree is ensured, and the size of the circuit is substantially reduced; in addition, the Butler matrix is of the microstrip structure, the weight is light, the cost is low, the industrial batch production is facilitated, and the Butler matrix has the advantages of simple structure, easy design and low manufacturing cost.

The invention discloses an all-solid-state laser capable of obtaining single-frequency output at a wavelength of 558nm. The all-solid-state laser comprises a pumping source system and a Z type resonator device, wherein the pumping source system comprises a laser diode LD, an optical fiber and a focusing coupling lens system which are arranged on an optical path in sequence; the Z type resonator device comprises a rear mirror, a concave folding mirror, a yellow light output mirror and a total reflective mirror which are arranged in a Z type cavity in sequence; wave plates and a laser gain medium are arranged between the rear mirror and the concave folding mirror; a birefringent filter is arranged between the concave folding mirror and the yellow light output mirror; and a frequency doubling crystal is arranged between the yellow light output mirror and the total reflective mirror. According to the all-solid-state laser, the high power density of fundamental light in the cavity is fully utilized and the frequency doubling efficiency is improved by adopting the Z type cavity, so that the yellow light laser output at single longitudinal mode, low noise, high power and high energy is realized, and the defects of the laser in the prior art are successfully solved.

The invention discloses a resonator assembly and a filter. The resonator assembly comprises a resonant member within a conductive resonator cavity. The resonant member extends from a first inner surface of the resonator cavity towards an opposing second inner surface. A main portion of the resonant member has a substantially constant first cross sectional area. A cap portion of the resonant member extending from the main portion towards the opposing second inner surface has a progressively increasing cross sectional area increasing from the first cross sectional area adjacent to the main portion to a larger cap cross sectional area at an end of the resonant member, the larger cap cross sectional area being at least l.1 times as large as the first cross sectional area. The resonant member may also have a flared section at the other end giving the resonant member an hour glass type shape.

Sonic improvement for all stringed instruments that employ a fulcrum tremolo bridge system with back of instrument counter tensioning springs. The improvement is provided by securing springs to claw assembly, as well as securing claw assemble to a flat plate of material which is in turn secured to instrument body. The claw and resonator plate can be fabricated as two individual pieces then fastened together or as a combined one piece assemble that is then fastened to instrument body.

The invention provides a filter and a duplexer, and the filter comprises a resonator group which is disposed on a wafer; and an adjustable inductor group arranged in the dielectric layer and connectedwith the resonator group. An adjusting point is arranged on the adjustable inductor group and is used for adjusting the inductance value of the adjustable inductor group by changing disconnection ofthe adjusting point, so that the filter has a corresponding electrical matching degree. According to the filter, by adjusting the inductance value of the adjustable inductance group, the filter has acorresponding electrical matching degree, so that the stability of the working parameters of the filter is improved.

A core (11) includes a first region (11a) and a second region (11b). The first region (11a) is a region of a radius ra from a central axis and has an active element that is excited by excitation light added thereto. The second region (11b) is a region surrounding the first region (11a) without a gap and extending to an outer peripheral surface of the core (11), and does not have the active element added thereto. When the radius of the core (11) is d, 0.1d<ra<d, and when the distance from the central axis in a radius direction of the core (11) is r, an average value of the concentration of the active element in a region where 0<=r<=0.1d is higher than an average value of the concentration of the active element in a region where 0.1d<r<=ra. In a region where 0.2d<r<=0.9d, there is at least one maximum value position at which the refractive index is higher than an average value of refractive index in a region where 0<=r<=0.9d and is at a maximum.

The invention belongs to the technical field of communication equipment components, and discloses a controllable attenuation band-pass filter, which comprises a dielectric layer, a metal layer is arranged on one side of the dielectric layer, and an input microstrip line, a plurality of resonators, a plurality of graphene nanosheets and an output microstrip line are arranged on the other side of the dielectric layer; the plurality of resonators are arranged between the input microstrip line and the output microstrip line at intervals, an input coupling slot with a first preset width is reserved between the input microstrip line and the adjacent resonator, a coupling line is arranged between the two adjacent resonators, and the resonators are connected through the coupling line; the plurality of graphene nanosheets are respectively clung to the plurality of resonators; the input microstrip line, the resonators and the output microstrip line are all provided with a plurality of connecting holes, and the connecting holes penetrate through the dielectric layer and are connected with the metal layer. According to the invention, functions of an attenuator and a filter are realized by using one device, the cost is reduced, the integration level is good, the selectivity is good, the design structure is simple, and the device has a good application prospect in the development of communication systems.

An oscillator circuit includes a resonator (SAW resonator), an amplifier circuit, and a switching element (NMOS switch). The amplifier circuit has a feedback path from one end to the other end of the resonator, a first inductance element (elongated coil) provided in the feedback path, and a variable capacitance element (variable capacitance diode) provided in the feedback path in series with the first inductance element. The switching element is provided in parallel to a circuit part including the first inductance element and the variable capacitance element.

The invention discloses an array scanning resonance type sand content detector based on self-adaptive optimal linear fusion. The array scanning resonance type sand content detector comprises an equipment protection box, an equipment framework, an array scanning resonance body, a temperature sensor, a pressure sensor and a flow velocity sensor. An equipment framework is connected to the lower portion of the equipment protection box, and the equipment framework is assembled into a #-shaped structure with a frame through a telescopic support. An array scanning resonator, a temperature sensor, a pressure sensor and a flow velocity sensor which face the same direction are installed on the equipment framework, and the array scanning resonator, the temperature sensor, the pressure sensor and theflow velocity sensor are arranged in an array mode. The array scanning resonator, the temperature sensor, the pressure sensor and the flow velocity sensor are connected to an equipment protection boxat the upper end through leads in the equipment framework, and a main control module is installed in the equipment protection box. According to the invention, the problems of single consideration factor and complex method for measuring the sediment concentration of the water body at present are solved.

On-chip Multi-band equalizers for adjusting signal strength for a receiver receiving multi-band frequency signals are provided. The multi-band equalizer comprises multiple series connected tapped LC resonators. The tapped LC resonator may be capacitive tapping or inductive tapping, where both frequency and gain of the frequency bands of interest may be programmed by tuning the capacitances of the programmable capacitors and/or selecting the tapped out terminals of the inductors. The multi-band equalizer may be connected to a signal node, for instance between two amplifiers in the receiver.