30 results about "Spiral resonator" patented technology

A resonator, a filter, and a duplexer are provided which are capable of very effectively suppressing the power loss caused by the edge effect, and which allow a great reduction in the overall size to be achieved. Also, a communication device including the above-mentioned filter or duplexer is provided. A ground electrode is formed over the bottom surface of a dielectric substrate, and a multiple spiral line pattern is formed on the top surface thereof. A radial line pattern is further formed on this surface with an insulation layer interposed therebetween. By thus disposing the radial pattern adjacently to the multiple spiral resonator constituted of the above-mentioned multiple spiral line, an electrostatic capacitance is added to the multiple spiral resonator. This reduces the occupation area of the resonator on the substrate, and improves the loss reduction effect.

The invention belongs to the technical field of microwaves and millimeter waves and provides a dual-mode reconfigurable filter based on a half-mode substrate integrated waveguide and a CSR structure,mainly to solve the problems that an ordinary tunable filter has large insertion loss and bias voltage of a PIN diode can not be directly added to the substrate integrated waveguide. The half-mode substrate integrated waveguide technology is adopted, an upper metal pattern layer comprises a half-mode substrate integrated waveguide copper clad layer, a DC bias circuit, an epsilon-type microstrip line and other structures. Two complementary circular spiral resonators (CSR) are arranged at two sides of the copper clad layer, through applying forward/reverse bias voltage, the PIN diode is conducted or cut off, the upper metal copper and the epsilon-type microstrip line are conducted or cut off, and finally, single dual passband switching is realized. The reconfigurable filter under the features is particularly suitable for a wireless communication system, and has the advantages of small size, low insertion loss, multiple transmission zero points, high out-of-band suppression, convenient DCfeed loading, quick tuning speed, convenient tuning and the like.

The present invention is one kind of symmetric double-spiral resonator and the band-pass filter therewith. The present invention features that the resonator consists of two linearly symmetric microstrip lines in spiral structure and connected into one integral, and the band-pass filter consists of input microstrip, output microstrip and resonator array comprising several double-spiral resonators. The filter of the present invention has the advantages of excellent frequency selectivity, high stop band suppression; and the resonator in symmetric double-spiral structure has reduced size, reduced coupling effect of non-adjacent resonators, and simplified circuit design and regulation. The present invention makes it possible to make traditional planar microstrip filter with common metal material and is suitable for making high temperature superconductive filter with high quality factor.

This invention provides a laser trimming method for tuning the frequency of a spiral resonator, and for improving the characteristics of a high temperature superconductor filter comprised of high temperature superconductor spiral resonators, by tuning the individual high temperature superconductor spiral resonators. This invention also provides a method for tuning the resonance frequency of a high temperature superconductor planar coil. This invention also provides a laser ablation process for creating high temperature superconductor circuit elements.

The invention provides a plane compact spiral three-mode filter, and relates to a microwave filter. The plane compact spiral three-mode filter is provided with a medium base plate, a spiral resonator with two grounded end points, grounding through holes, a T-shaped branch microstrip wire extending from the center of the resonator to the top, a T-shaped branch microstrip wire extending from the center of the resonator to the bottom, a coupling wire, a feeder wire and a grounding plate, wherein the spiral resonator with the two grounded end points, the T-shaped branch microstrip wire extending from the center of the resonator to the top, the T-shaped branch microstrip wire extending from the center of the resonator to the bottom, the coupling wire and the wire are arranged on the upper surface of the medium base plate; the lower surface of the medium base plate is tightly attached to the grounding plate; the grounding plate completely covers the lower surface of the medium base plate; the two end points of the spiral resonator with the two grounded end points are connected with the grounding plate through the grounding through holes; the grounding plate is externally connected with a coaxial outer conductor; one end of the feeder wire is connected with the end point of the coupling wire; the other end of the feeder wire is externally connected with a coaxial inner conductor. The design is simple; the structure is compact; the center frequency and the passband are adjustable; the manufacturing and the popularization are easy.

Information is encoded in a resonator/antenna structure, which may be interrogated in order to retrieve the information via radio frequency (RF) excitation. The resonator/antenna structure comprises a multiresonator including a plurality of substructures, and exhibits a plurality of resonances in the RF domain. Characteristic frequencies of the resonances depend upon the substructures, which may be modified in accordance with information to be encoded within the resonator/antenna structure. The resonator/antenna may be formed as a conductive structure disposed upon a dielectric substrate, and may be useful for encoding information within chipless RFID tags, security documents, negotiable instruments, and so forth. A variety of suitable multiresonator structures are disclosed, including multi-stop-band filters comprising cascaded spiral resonators, a 'wheel and spoke' structure, an interleaved resonant circuit, and a fractal resonator structure.

The spiral includes turns of rectangular section, whose pitch p and/or thickness e can vary from the inside curve towards the outside curve, or whose winding can deviate from the line of a perfect spiral. The inside curve can also be extended by a self-locking washer for fixing the spiral on the balance arbour with no play. The spiral is manufactured by photolithography and galvanic growth, or by micro-machining an amorphous or crystalline material, such as a silicon wafer.

The invention discloses a miniaturized broadband band-pass filter based on spiral resonators. The miniaturized broadband band-pass filter is realized in a microstrip form and comprises a microstrip substrate, a bottom layer ground and a top layer microstrip circuit, wherein the microstrip substrate is formed on the bottom layer ground, the top layer microstrip circuit is formed on the microstrip substrate, and the top layer microstrip circuit comprises an input tap, an output tap and a resonator array connected between the input tap and the output tap. The coupling strength between the resonators is greatly improved by adopting nest coupling, the tap type feeding mode is combined, and the broadband band-pass filter is easy to realize. The resonators are simple and compact in structure, convenient to machine and manufacture and suitable for microwave integrated circuits.

A filter and a duplexer in which power loss due to the edge effect in resonator lines, is very effectively suppressed, which allow more reduction in overall size to be achieved, and which have desired filter characteristics, and a communication device including either or both of the filter and the duplexer. Three multiple spiral resonator stages are constructed by disposing three multiple spiral lines on the top surface of a dielectric substrate, and forming a ground electrode on the bottom surface thereof. If the first stage is set to be a right-handed spiral resonator, and the second and third stages are set to be left-handed spiral resonators, an attenuation pole is thereby created on the higher frequency side of a pass band.

The invention discloses a dual-band lossless dielectric constant measurement sensor based on a spiral resonator, the sensor is a two-port device, the sensor is composed of a dielectric layer, a metal patch layer and a grounding layer, the sensor generates two resonance points in a frequency range of 1GHz-4GHz, the measurement of the dielectric constant and the dielectric loss angle tangent at the two frequency bands of 1.0 GHz-2.0 GHz and 2.1 GHz-3.1 GHz can be realized; and the invention has the advantages of simple structure, high Q value, high sensitivity, low processing difficulty and low cost.

The present invention relates to a square double-notch ultra wide-band antenna with spiral resonators. The antenna comprises a dielectric substrate (1), a radiation element (2), spiral ring resonators (3), a coplanar waveguide signal feed strip line (4) and coplanar waveguide ground planes (5). The radiation element, the spiral ring resonators, the coplanar waveguide signal feed strip line and the coplanar waveguide ground planes are printed at the upper surface of the dielectric substrate; the radiation element is in square-shaped and located at the middle portion of the dielectric substrate; the coplanar waveguide signal feed strip line clings to the edge of the dielectric substrate and is connected with the radiation element; there are two pieces of coplanar waveguide ground planes which are respectively fixed at two sides of the coplanar waveguide signal feed strip line, and there is a gap between each coplanar waveguide ground plane and a microstrip line; and the two spiral ring resonators are located at two sides of the radiation element, and there is a certain gap between each spiral ring resonator and the radiation element. The two spiral ring resonators are arranged at two sides of the radiation element to realize the notch performance without degradation of the ultra wide-band antenna performance, and the square double-notch ultra wide-band antenna with the U-shaped groove is compact in structure and tiny in size, has reliability and simplicity, can regulate notch frequency, solves the problem of the same frequency interference of the ultra wide-band communication system and has a high practical value.

The invention relates to a microstrip planar spiral filter comprising N resonant cavities which are distributed on the same microstrip circuit board, wherein N is a positive integer, and the resonant cavities are formed by microstrip planar spiral resonators. The N-order coupled resonant cavity filter is realized by N microstrip planar spiral resonators through mutual coupling. Coupling strength of direct coupling between the two adjacent resonators is confirmed by distance between the adjacent resonators. Coupling intensity of capacitive coupling between the non-adjacent resonators is adjusted by inserting a microstrip line, and the shape of the inserted microstrip line is pi-shaped or H-shaped. Resonant frequency of all the microstrip planar spiral resonators, coupling intensity between the resonators and the loaded Q value inputted to and outputted from the resonators are adjusted by the aforementioned method. The designed microstrip planar spiral filter is small in size, small in area, light in weight and relatively wide in passband range and can be realized by adopting a printed circuit board technology or a thin-film technology so as to be low in cost and suitable for almost all microwave frequency bands.

The present invention discloses imaging antenna and array by designing the system in the Ultra-high frequency (UHF) band 300 MHz-3 GHz with resolution comparable to high-frequency microwave imagers (i.e., super-resolution). To obtain high resolution at relatively low system cost and complexity, a novel modulated antenna array element design is disclosed. The antenna is basically small loop loaded with spiral resonator. The selection of the SR as a resonator provides for adequate miniaturization rate at the lower end of the microwave frequency range. A non-modulated version of this antenna has been conceived and yielded a resolution comparable to the 24 GHz antennas while operating at 426 MHz. The disclosed antenna element operating at 426 MHz produced images with very comparable attributes to the one obtained at 24 GHz. In fact, it has been established that proposed antenna element yield a resolution of around 5 mm (much less that the wavelength divided by 100), and hence it provides super-resolution as long as the diffraction limit is concerned. The present invention further discloses an imaging probe unit comprising a imaging sensor loaded with a PIN diode, an L-matching circuit and an LC resonant detuning circuit. The present invention further discloses a one-dimensional array, comprising a plurality of imaging probe units which are placed side by side in very close proximity of each other.

The invention discloses a control system for actively stabilizing the power of a radio frequency trapping field of an ion trap, and relates to the field of radio frequency power control. The system comprises a radio frequency signal source circuit, a power division circuit, a power amplification circuit, a spiral resonator, a sampling capacitor circuit, an ion trap, a first frequency mixer, a second frequency mixer, a passive low-pass filter circuit, a reference voltage source circuit, an operational circuit and a PID (Proportion Integration Differentiation) controller. The output power and the phase drift of the spiral resonator are effectively reduced, and a more stable control environment is provided for trapping ions.

The invention discloses a high-frequency matching method for a MHz-level beam cutter. The method comprises the following steps: giving a fixed resonant frequency f0; determining tend skin depth according to the given resonant frequency f0; determining the minimum value d0 of the diameter of a wire according to the tend skin depth, wherein the d0 needs to consider two conditions that the size of ashielding housing is as small as possible and the power is in a bearable range; calculating the minimum size of the spiral resonator according to d0; calculating corresponding power P according to theminimum size of a spiral resonator; judging whether the power P is within the bearable range or not; if the power is not in the bearable range, adjusting the d0, and returning to the step 4; and if the power is in the bearable range, taking the size of the spiral resonator corresponding to the current d0 as the final size. By changing the shape of the spiral wire, changing the size of the spiralwire, changing the proportional relation between the spiral wire and the power P and changing the proportional relation between the number of turns N of a coil and the inductance L, an unexpected technical effect of reducing the size of the spiral resonator by 50% is achieved.

The invention discloses a DC beam cutting device based on sine wave waveforms. The cutting device comprises a spiral resonator and a beam cutting pole plate device. The spiral resonator is used for providing a high-frequency voltage for the beam cutting pole plate device, and the beam cutting pole plate device is used for providing an alternating electric field for beam passing and beam deflecting. The spiral resonator comprises a capacitance fine-tuning pole plate used for accurately fixing the inherent frequency of the spiral resonator, a coupling coil adjusting bracket used for adjusting the resonant frequency of a coupling coil, and a solenoid coil supporting framework used for keeping the distance between coils constant and keeping the diameter of each turn of coil unchanged. According to the invention, the technical problem that the high-precision inherent frequency of the resonator cannot be realized for a long time in the field is solved. The capacitance fine-tuning pole plate,the coupling coil adjusting bracket and the solenoid coil supporting framework are organically combined, supported by one another and dependent of one another, so that the difficulty that the high-precision inherent frequency cannot be realized only by solving problems from one aspect is solved.

The invention discloses a miniaturized spiral surface-mountable band-pass filter based on a multilayer PCB structure. The miniaturized spiral surface-mountable band-pass filter comprises four dielectric substrates, five metal copper layers, three prepreg bonding layers, four quarter-wavelength short-circuit spiral resonators, a spiral coupling window, a through metallization via hole and a coplanar waveguide type feed port. According to the invention, a multi-layer PCB pressing technology is utilized, the quarter-wavelength short-circuit spiral resonators are designed in the metal shielding cavity, are mutually embedded in the horizontal direction and are stacked in the vertical direction, and the filter has the characteristics of miniaturization, compactness, easy design, surface mounting, high selectivity, high out-of-band rejection, low loss and high power capacity; scene application with small size and high performance requirements, such as a base station system and handheld equipment, is facilitated.

The invention discloses a common-cavity spiral resonance filter which comprises a first spiral resonator, a second spiral resonator, a first dispersion structure and a shell. The first spiral resonator is provided with a first end part and a second end part which are opposite to each other, and the second spiral resonator has a first end and a second end opposite to each other. A first dispersionstructure is connected between a first end of the first spiral resonator and a first end of the second spiral resonator, a cavity is formed in the shell, and the first spiral resonator, the second spiral resonator and the first dispersion structure are contained in the cavity. The technical scheme is used for solving the problem that the out-of-band rejection does not reach the standard due to thefact that an existing common-cavity spiral resonator filter cannot generate a transmission zero point.