8 results about "RF and microwave filter" patented technology

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.

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 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 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 application provides a microwave filter optimization debugging method and device based on knowledge transfer and a storage device, and comprises the following steps: for the initial microwave filter debugging task, establishing an initial knowledge generation model, determining an initial optimization range and optimizing and debugging the initial microwave filter, and based on the established initial knowledge generation model and the determined initial optimization range, optimizing and debugging the initial microwave filter; for the debugging task of other microwave filters, evaluating the difference degree, determining the transfer strength, establishing the knowledge generation model, determining the optimization range and optimizing and debugging, based on the difference degree and the transfer strength obtained in the difference degree evaluation stage, fine-tuning the initial knowledge generation model to obtain the knowledge generation model; and based on the knowledge generation model and the determined optimization range, optimizing and debugging the other initial microwave filter. The application has the beneficial effect of realizing efficient debugging of microwave filters between individual differences, transferring knowledge between different tasks and improving the overall debugging efficiency.

The application provides a microwave filter debugging method based on knowledge-driven particle swarm optimization, mainly including data collection, data-driven knowledge model establishment, debugging knowledge extraction, knowledge-driven particle swarm optimization, debugging process model construction and debugging according to the optimization result. The microwave filter debugging method based on knowledge-driven particle swarm optimization has the beneficial effects that a series of evaluation functions are set for each performance index of the microwave filter, the filter performance is effectively comprehensively evaluated, the knowledge model is established through a large amount of data, the debugging knowledge is mined, the particle swarm optimization algorithm is driven by using the debugging knowledge, the optimization can be effectively avoided from falling into local optimization by setting the optimization range of each adjustable parameter, and the debugging efficiency is significantly improved.