39 results about "Microwave filter" patented technology

A microwave filter arrangement (100) for quantum computing applications, the filter arrangement (100) comprising a first port (113) and a second port (114). The microwave filter arrangement (100) comprises a main waveguiding structure (110) arranged between the first (113) and second (114) port, where the main waveguiding structure (110) comprises an inner conductor (111) having a circular cross-section that is surrounded by a hollow outer conductor (112) having a rectangular cross-section with two opposed long sides and two opposed short sides. The waveguiding structure (110) comprises a plurality of hollow waveguides (115) extending away from one or both of the long sides of the outer conductor, the hollow waveguides (115) comprising a dielectric material (122) and being terminated by an electromagnetically absorptive material (124).

This invention discloses a filter physical perception optimization method based on residual attention and transposed convolution, comprising the following steps: constructing a filter characteristic prediction surrogate model based on residual self-attention mechanism and transposed convolution decoding to establish a nonlinear mapping relationship between filter geometric parameters and electromagnetic response parameters; training the filter characteristic prediction surrogate model using an S-parameter weighted mean square error loss function to obtain a trained filter characteristic prediction surrogate model; and using a physical perception-improved differential evolution algorithm, employing the trained filter characteristic prediction surrogate model as a predictor to find the optimal combination of geometric parameters that satisfies the filter design specifications in the solution space. This method is a filter optimization design method that balances high-precision prediction and high-efficiency optimization. This method can predict the S-parameters of microwave filters more accurately than traditional neural networks, effectively replacing time-consuming full-wave electromagnetic simulation.

The application discloses a kind of based on graph embedding microwave filter fault diagnosis's performance debugging method, first, the admittance parameter feature extraction network of complex convolution coding subnetwork and complex deconvolution decoding subnetwork cascade is built, then combined with the microwave filter structure to be diagnosed and debugged graph convolution inversion network is built, generates admittance parameter training set and scattering parameter training set, finally alternately trains admittance parameter feature extraction network and graph convolution inversion network, carries out fault diagnosis and debugging to microwave filter.The present application is an unsupervised model, which reduces the difficulty of collecting a large number of data sets;And in the process of fault diagnosis and debugging, without any iterative optimization process, a large amount of diagnosis and debugging time can be saved;The model constructed in combination with the physical structure of the filter can be used for fault diagnosis and debugging of microwave filters of any structure, and has higher applicability.

A microwave filter includes a superconductor-to-insulator transition (SIT) layer including a material exhibiting a superconductor-to-insulator transition associated with a superconducting gap frequency. For signals transmitting through the layer, the microwave filter is a low-pass filter in which twice the superconducting gap frequency is a cutoff frequency.

The application discloses a C-band tuning-free duplexer and belongs to the technical field of microwave filters. The tuning-free duplexer comprises an upper conductor and a lower conductor, and the upper conductor and the lower conductor are buckled one above the other to form a waveguide cavity. The upper conductor is provided with a combining port in the middle of the top, and the lower conductor is provided with a low-frequency input / output port and a high-frequency input / output port at the bottom. The waveguide cavity from the low-frequency input / output port to the combining port constitutes a low-end filter, and the waveguide cavity from the high-frequency input / output port to the combining port constitutes a high-end filter. The main bodies of the high-end filter and the low-end filter are both a plurality of waveguide resonant cavities arranged along a straight line, the middle positions of each waveguide resonant cavity are provided with cavity loading, and adjacent waveguide resonant cavities are connected through inter-cavity coupling. The tuning-free duplexer adopts a symmetrical structure and a center loading mode, realizes tuning-free assembly, has the characteristics of high power bearing capacity, low transmission loss and excellent signal isolation, and is suitable for a C-band communication system.

A method for designing an acoustic microwave filter in accordance with frequency response requirements, comprising: selecting an initial filter circuit structure comprising a plurality of circuit elements including at least one resonant element and at least one other reactive circuit element; selecting attenuation-free circuit response variables based on the frequency response requirements; selecting a value for each of the circuit elements based on the selected circuit response variables to generate an initial filter circuit design; transforming the at least one resonant element and the at least one other reactive circuit element of the initial filter circuit design into at least one acoustic resonator model to generate an acoustic filter circuit design; adding parasitic effects to the acoustic filter circuit design to generate a pre-optimized filter circuit design;Optimizing the pre-optimized filter circuit design to produce a final filter circuit design; and building the acoustic microwave filter based on the final filter circuit design.

The application discloses a double-rotation-in-rotation-out structure microstrip resonator and microwave filter, and relates to the technical field of microwave communication. The opening end of the first rotation-in-rotation-out structure and the opening end of the second rotation-in-rotation-out structure are opposite and diagonally symmetrical. The first rotation-in-rotation-out structure and the second rotation-in-rotation-out structure are both double-line structures, which are wound in a character-shaped manner at a set initial position, and when wound to a preset terminal position, the inner line is elongated until a U-shaped structure surrounds the part wound in the character-shaped manner. The outer lines of the two double-line structures are connected through a first microstrip line. The double-line structure is composed of two parallel microstrip lines, and the two parallel microstrip lines are connected through a preset microstrip line at the corresponding set initial position. The application aims to solve the problem that it is difficult to achieve extremely weak coupling of the resonator at a small interval, and improve the stability of the coupling.

A superconducting device is described wherein the device comprises a substrate; a capacitor structure (604) and a superconducting inductor structure (602) disposed on the substrate, the capacitor structure an the superconducting inductor structure forming a superconducting microwave filter structure, in particular a low-pass filter, the superconducting inductor structure including a plurality of nanowires of a superconducting material, each of the plurality of nanowires being galvanically connected to one of a plurality of capacitor electrodes (608) forming the capacitor structure, wherein the cross-sectional dimensions of the plurality of nanowires are selected such that the kinetic inductance of each of the one or more nanowires is larger, preferably substantially larger, than the geometrical inductance of the nanowire.

The utility model discloses a kind of multilayer surface-mounted filters, it is related to microwave filter technical field, the utility model is replaced metal cavity / LTCC by adopting compression process multilayer substrate, avoid cavity bulky structure, overcome the problem of LTCC sintering deformation, realize the size is reduced substantially, simultaneously, by interlayer coupling resonance unit in vertical direction is partially overlapped, it can promote Q value to traditional single layer microstrip 2 times or more, and full-wrapped metal shell can replace traditional partial ground layer, reduce stray radiation leakage, can break through volume, loss, suppression, temperature drift and power and multiple bottleneck, to meet the use demand of filter in harsh environment.

The invention discloses a microwave filter coupling matrix reconstruction method based on Householder transformation, and the method specifically comprises the steps: introducing a brand-new global view strategy: enabling a Householder vector in each step to be aligned with a feature vector of a matrix related to overall transformation, and achieving the global optimal control of a transformation path based on a Rayleigh quotient iteration theory; while an optimization route is reserved, an accurate and efficient gradient calculation method is developed, so that optimization can be almost completed in real time. Meanwhile, by means of introduction of parallel computing, the search speed of feasible solutions is greatly increased, and the calculation performance is far better than that of a traditional method; an advanced constraint processing mechanism is introduced through an enhanced Lagrange method, engineering constraints are directly embedded into a transformation process for the first time, and the fatal defect that a traditional method lacks constraint control is overcome.

The application discloses a coaxial cavity resonator and an electrically tunable band-pass filter, and belongs to the technical field of microwave filters. The coaxial cavity resonator comprises an outer cavity, an inner conductor, a tuning rod and a dielectric support. The inner conductor comprises a fixed part and a sliding part. The fixed part is fixed at the central position of the outer cavity through the dielectric support. The sliding part of the inner conductor is in good elastic conductive contact with the fixed part through a spring leaf. The sliding part of the inner conductor can linearly reciprocate inside the fixed part of the inner conductor. The transmission part of the inner conductor is fixed with the tuning rod through a thread. The tuning rod is a non-metal solid cylinder. The electrically tunable band-pass filter is composed of multiple coaxial cavity resonators, input and output structures and a coupling structure between the electrically tunable resonators. The electrically tunable band-pass filter has a wide tuning stroke, an unchanged absolute bandwidth and strong anti-interference capability.

The invention discloses an in-phase locking device and method of an ultra-low phase noise dual-frequency photo-generated microwave source. The device comprises an active optical loop, a radio frequency gain link and a frequency division and phase synchronization control unit. The active optical loop comprises an optical amplifier, an optical isolator, an optical filtering unit, an optical delay unit and an electro-optical modulation unit, and is used for generating high-coherence optical signals. The radio frequency gain link comprises an optical detector, a microwave filter, a radio frequency amplifier and a phase regulation and control unit, and is used for converting an optical signal into a high-frequency microwave signal. And the frequency division and phase synchronization control unit performs frequency division on the high-frequency microwave signal, and locks the phase of the low-frequency microwave signal obtained by frequency division to the high-frequency microwave signal through a phase-locked loop formed by the frequency mixer, the reference source and the servo feedback unit. According to the invention, the high-Q-value optical delay unit is utilized to suppress phase noise, and through an integrated phase locking design, phase-synchronous dual-frequency and ultra-low phase noise microwave signal output is realized, and the problem that phases of two independent microwave sources are not synchronous is solved.

The utility model discloses a structure for solving synchronous tuning of a coaxial mechanically tuned filter, which belongs to the technical field of microwave filters and comprises five parallel coaxial cavities, tuning rods in the coaxial cavities, double-coupling hole structures between adjacent cavities and input and output structures. The cavity bodies of the five parallel-row coaxial cavities are the same in size and are symmetrically distributed, the number of the cavity bodies can be N, and the coaxial cavity bodies can be arranged in a parallel-row mode or other flexible modes. The tuning rods in the coaxial cavity are symmetrically distributed, the diameters of the tuning rods are different, the middle of the tuning rods is thick, and the two sides of the tuning rods are thin. The double-coupling junction hole structure between the adjacent cavities is formed by forming two regular coupling holes in the common wall of the adjacent cavities, and the coupling between the whole cavities is symmetrically distributed. By changing the diameter of the resonance rod in the coaxial cavity, the problem of asynchronous high-frequency mechanical tuning is solved, and meanwhile, the bandwidth difference in the whole tuning range can be reduced by adopting the double coupling holes.

The invention discloses a high-entropy tungstate microwave dielectric ceramic material and a preparation method thereof, and relates to the technical field of microwave dielectric ceramic materials. The preparation method of the high-entropy tungstate microwave dielectric ceramic material comprises the following steps: weighing raw materials and uniformly mixing to form a mixed raw material; mixing the grinding balls, a process control agent and the mixed raw material, carrying out ball milling to obtain a mixed material, drying the mixed material, adding an adhesive, granulating, and pressing to form a green body; and carrying out four-stage heating sintering on the green body, and then carrying out furnace cooling to room temperature to obtain the high-entropy tungstate microwave dielectric ceramic material. Aiming at the condition of high sintering temperature of a tungstate-based ceramic dielectric material, the microwave dielectric ceramic material is prepared by a multi-element solid solution effect method, and the method has the advantages of simplicity and convenience in operation, accuracy in control and high stability, and can be applied to the field of preparation of high-frequency electronic elements such as microwave filters and resonators applied to LTCC (Low Temperature Co-Fired Ceramic).

The application discloses a microwave filter diagnosis and repair inversion method based on a knowledge graph, and the steps are as follows: obtaining full-period unstructured text data of a microwave filter, and constructing an ontology of a microwave filter knowledge graph; preprocessing the unstructured text data to generate a training set and a test set; training an entity extraction model based on a bidirectional long short-term memory network, associating the extracted entities according to the ontology, obtaining knowledge triples, and constructing a microwave filter knowledge graph; fusing the microwave filter knowledge graph with a diagnosis and repair inversion model; and based on the microwave filter knowledge graph, performing diagnosis and repair inversion to realize fault diagnosis, debugging guidance and design. The application improves the utilization rate of accumulated data of the microwave filter, enhances the cooperation of microwave filter design and manufacturing, and improves the design and manufacturing iteration efficiency.

A microwave filter includes a multilayer stack. The multilayer stack includes one or more first-type layers composed of a first superconductor material having a first superconducting critical temperature; and one or more second-type layers composed of a non-superconductor metal or a second superconductor material having a second superconducting critical temperature that is lower than the first superconducting critical temperature. The multilayer stack is configured to behave as a dissipative metal for photons having a frequency above twice a superconducting gap frequency of the multilayer stack and to behave as a superconductor for photons having a frequency below twice the superconducting gap frequency of the multilayer stack.

The utility model provides a silicon-based capacitance microstrip low-pass filter, microwave test equipment and electronic countermeasure equipment, and relates to the technical field of microwave filter design, the silicon-based capacitance microstrip low-pass filter comprises a dielectric plate, the upper surface of the dielectric plate is provided with a microstrip line, the microstrip line is provided with a multi-order microstrip branch, and the multi-order microstrip branch is provided with a micro-strip. Each order of microstrip branch is connected with one end of a silicon-based capacitor chip, and the other end of the silicon-based capacitor chip is grounded. According to the utility model, the filter is constructed by combining the micro-strip branch and the silicon-based capacitor chip, and the silicon-based capacitor chip has the characteristics of high Q value, low loss, high power capacity, low temperature drift and the like, so that the size of the filter can be reduced, and the performance of the filter can be improved.

The invention relates to the technical field of filters, in particular to an automatic design method and system for a microwave filter based on a large language model and multiple agents, and the method comprises the steps: taking a user design index as input, selecting a filter architecture through a pre-trained large language model, and calling a preset calculation model to calculate an initial physical size; generating a design scheme report including a filter architecture and an initial physical size; then querying an ADS control code knowledge base to obtain a standardized ADS control code template matched with the filter architecture; based on the standardized code template, converting the design scheme report into an executable ADS control code for creating a schematic diagram and executing scattering parameter simulation in an ADS environment; and carrying out iterative optimization by using a joint optimization algorithm based on simulated annealing and a particle swarm optimization algorithm to obtain a design schematic diagram of the microwave filter. According to the method, the filter is designed in combination with the large language model, so that the microwave filter gets rid of dependence on experts in the design process, and the design efficiency is improved.

The application provides a microwave filter shape-coupling relationship hybrid modeling method, device and storage device, constructs original data sets D1 and D2, extracts Y parameters y1 in D1 through a vector fitting method, constructs a data set Y1 containing resonance screw length x1 and Y parameters y1, extracts Y parameters y2 in D2, constructs a data set Y2 containing coupling screw length x2 and Y parameters y2, designs a microwave filter shape-coupling hybrid model, a shape-coupling relationship model in a serious detuning state and a shape-coupling relationship model in a slight detuning state, and realizes mapping from resonance screw length x1 and coupling screw length x2 to Y parameters y1 and y2. The application has the beneficial effects that the microwave filter is divided into two states of slight detuning and serious detuning, different structure geometric parameters are selected to establish shape-coupling relationship models, the complexity of establishing shape-coupling relationship models is reduced, and the accuracy of shape-coupling relationship models in various states is improved.

The application provides a structure parameter adjustment method of a microwave filter and electronic equipment. The method comprises the following steps: determining the zero point frequency and pole point frequency of each multi-order resonator in a first single-port network of the microwave filter; obtaining the intermediate resonant frequency of each multi-order resonator according to the zero point frequency and pole point frequency of each multi-order resonator in the first single-port network; obtaining the intermediate coupling coefficient between adjacent two multi-order resonators in the multi-order resonators in the first single-port network according to the zero point frequency, pole point frequency and intermediate resonant frequency related to the adjacent two multi-order resonators; and adjusting the structure parameter of the first single-port network based on the plurality of intermediate resonant frequencies, at least one intermediate coupling coefficient and the standard performance parameter corresponding to the microwave filter.

The utility model discloses a duplexer with a miniaturized structure, which relates to the technical field of microwave filters and comprises an outer conductor, a resonator, a front cover plate, a rear cover plate and an input / output structure. The resonators are distributed up and down, the upper part of each resonator is a loading cavity in the high-end filter, the lower part of each resonator is a loading cavity of the low-end filter, the segmentation part of each resonator is L-shaped, and the coupling ring of the duplexer is positioned on one side of the resonator and is integrally processed with the resonator. And the front cover plate and the rear cover plate are connected with the outer conductor and the resonator. The input and output structure is a coaxial structure. According to the utility model, the mutual influence between the high-end filter and the low-end filter is avoided. The coupling rings and the resonators of the duplexer are integrally processed, so that the error is small, the consistency is high, and the processing is easy. And the resonator and the outer conductor are separately processed and then assembled, so that the consistency of the assembled duplexer is improved.

A microwave filter includes a superconductor-insulator transition (SIT) layer including a material exhibiting a superconductor-insulator transition associated with a superconducting energy gap frequency. For a signal transmitted through the layer, the microwave filter is a low-pass filter having a cutoff frequency twice the superconducting gap frequency.

The present application belongs to the field of microwave technology and artificial intelligence application, and specifically provides a neural network-based microwave filter coupling matrix extraction method to solve the problems of complexity and insufficient accuracy in existing Cauchy method and optimization method, and can be used in the design and tuning of microwave filters. In the process of extracting the microwave filter coupling matrix based on S parameters, a neural network is introduced, which only needs a large amount of data for training, avoids complex formula derivation and simplification, and is convenient and fast. After training, the trained convolutional neural network model can quickly extract the coupling matrix of the microwave filter according to the S parameters, and has strong real-time performance. In addition, based on the data set construction method proposed in the present application, the data acquisition speed is fast, thereby avoiding the consumption of a large amount of time in the data acquisition stage.

The application provides a flexible microwave filter based on a substrate integrated waveguide, in order to reduce the size of the SIW filter, a half-mode substrate integrated waveguide (HMSIW) structure is adopted, the HMSIW is equivalent to half of a complete SIW resonant cavity, one side of the HMSIW is a metalized via array which is the same as the SIW resonant cavity, and the other side is a flat open surface. The physical size of the flexible filter is reduced, so that the filter only occupies a small physical volume when working in a low frequency band. The introduction of the distributed DMS structure can reduce the performance change caused by the bending of the DGS structure, thereby reducing the frequency shift of the filter in the bent state, so that the flexible filter can maintain stable performance under a large bending degree, and the performance in the flat state and the bent state is basically consistent.

The application discloses a high-entropy tungstate microwave dielectric ceramic material and a preparation method thereof, and relates to the technical field of microwave dielectric ceramic materials. The preparation method of the high-entropy tungstate microwave dielectric ceramic material comprises the following steps: weighing raw materials and uniformly mixing the raw materials to form mixed raw materials; mixing grinding balls, a process control agent and the mixed raw materials, and ball milling to obtain mixed materials; after the mixed materials are dried, an adhesive is added for granulation, and then a green body is formed by pressing; the green body is subjected to four-stage temperature rising sintering, and then is cooled to room temperature in a furnace, so that the high-entropy tungstate microwave dielectric ceramic material is obtained. According to the high sintering temperature of the tungstate-based ceramic dielectric material, the microwave dielectric ceramic material is prepared by the method of multi-element solid solution effect, and the method has the advantages of simple operation, accurate control and high stability, and can be applied to the preparation field of microwave filters, resonators and other high-frequency electronic components for LTCC applications.

The invention provides a ceramic substrate structure of an integrated microwave filter and a BGA tube shell, and belongs to the technical field of packaging, and the ceramic substrate structure comprises a ceramic substrate, an upper metal layer laid on the upper surface of the ceramic substrate, and a lower metal layer laid on the lower surface of the ceramic substrate; a conventional functional area and a microwave filtering functional area are integrated on the ceramic substrate; the conventional functional area is provided with metalized via holes which are distributed in an array. The microwave filtering functional area comprises a plurality of resonant cavities enclosed by a plurality of metalized through holes, and the plurality of resonant cavities are arranged in a line; the isolation slots are respectively arranged on the upper metal layers corresponding to the two resonant cavities at the two ends and are provided with isolation slots with opposite openings; the two isolation gaps are respectively used as an input end and an output end of a microwave signal, a signal transmission channel is arranged between the adjacent resonant cavities, and the microwave filter formed by the resonant cavities and the isolation gaps is integrated on the ceramic substrate. And the microwave filter is integrated on the ceramic substrate, so that the integration level and miniaturization of the product can be improved, and the requirement of modern electronic products on miniaturization is met.

The application discloses a miniaturized wideband folded patch filter for a 5G n78 frequency band, and relates to the technical field of radio frequency microwave filters. The folded patch filter comprises a first dielectric plate, a second dielectric plate, a metal ground layer located between the two dielectric plates, and first and second half-patch structures arranged outside the two dielectric plates. The two half-patch structures are formed by dividing a same square patch along a center line, are electrically connected through a metalized via array penetrating the two dielectric plates at folded side edges, and a gap is formed between the metal ground layer and the metalized via array. Input and output feed lines are arranged at opposite sides of the folded side edges of the two half-patch structures, respectively, and a plurality of groove bodies symmetrically arranged with respect to the corresponding feed lines are formed, thereby constituting a combined perturbation network to realize port impedance matching, passband widening and lower stopband transmission zero point construction. The folded patch filter has the advantages of miniaturization, wide frequency band, low insertion loss and high out-of-band suppression, and is suitable for mass production by conventional PCB technology.

The present invention relates to the field of microwave filters and discloses a compact, highly selective, substrate-integrated waveguide triangular cavity wideband bandstop filter. The filter comprises, from top to bottom, an upper metal layer, an intermediate dielectric layer substrate, and a lower metal layer. The upper metal layer is connected to the lower metal layer through metallized vias and, together with the intermediate dielectric layer substrate, forms a dielectric-filled cavity. The cavities are all triangular in shape and consist of only right-angled isosceles triangular cavities and equilateral triangular cavities. The length of the right-angled isosceles triangular cavities is linearly related to the length of the sides of the equilateral triangular cavities, giving the entire filter a pentagonal structure. The present invention combines harmonic interleaving technology and harmonic coupling technology to propose a relationship between the right-angle side length of a substrate integrated waveguide right-angle isosceles triangular cavity and the side length of a substrate integrated waveguide regular triangular cavity, which not only has a compact and simple structure, but also simplifies the design steps and has important application prospects.

The invention provides an anti-micro-discharge microwave filter. The filter comprises a top plate, an aluminum film, a blank body, a rubber pad and a body, the body is of a box-shaped structure with an opening in the side face, and a partition plate is arranged in a containing cavity. The rubber mats are arranged in the partition plates; the blank body is arranged on the rubber mat; the aluminum film covers the upper surface of the blank body; the aluminum film, the blank body and the rubber mat are fixed on the body through the top plate; according to the invention, a microwave filter design technology based on a filter blank is provided, the micro-discharge threshold value of the microwave filter is improved by utilizing the high voltage resistance characteristic and the high Q * f value of a microwave dielectric material, no redundant zero cavity is needed on a linear structure, a CT cross coupling structure is realized, and meanwhile, the out-of-band rejection index of the filter is improved; the whole assembly structure is simple, the debugging is simple, and the miniaturization and lightweight design of the microwave filter in the spaceflight load is realized.

The invention discloses a microwave filter coupling matrix extraction method of a depth separable convolutional neural network. The method comprises the following steps: step 1, establishing microwave filter coupling matrix calculation parameters; 2, constructing a data set of parameters and a coupling matrix; step 3, constructing a deep separable convolutional neural network model; 4, training the depth separable convolutional neural network model by using the training data set; step 5, establishing a filter model based on electromagnetic simulation software HFSS to extract parameters, and removing phase offset from simulation parameters; step 6, extracting a coupling matrix; the problems of poor model robustness, low extraction precision, poor model generalization caused by phase inconsistency between data generated by a formula method and simulation / actual measurement data and the like existing in coupling matrix extraction of an existing method are solved.