14 results about "Superconducting filter" patented technology

The application discloses a resonator and a compact ultra-narrow-band high-temperature superconducting filter, which adopts SISO spiral structure and interdigital structure to form a dual composite left-right hand resonator in parallel, wherein the interdigital structure forms an open end of the resonator, the SISO spiral structure forms a closed end of the resonator, and the interdigital structure is composed of a plurality of mutually parallel interdigital branches; the interdigital structure is used for introducing a left-hand capacitor and increasing an equivalent capacitance of the resonator; a first end of the interdigital structure is directly connected with a microstrip line and spirals in a clockwise direction, spirals out in a counterclockwise direction along the microstrip line at a rotation center, bypasses the interdigital structure, is connected to a second end of the interdigital structure to form the SISO spiral structure; and the overall filter size can be greatly reduced, the insertion loss in a passband of the filter, the out-of-band suppression capability, the roll-off coefficient of a transition band are greatly improved, and the selectivity of the filter is enhanced.

The invention discloses a metal intercalation boron-carbon superconducting material GeB2C2 under normal pressure and a preparation method of the metal intercalation boron-carbon superconducting material GeB2C2. The material has a two-dimensional Kagome lattice structure, the space group is P6 / mmm (No.191), the lattice constants are a = b = 2.732, and c = 16.784. Through calculation and prediction of a first principle, the material has a superconducting transition temperature of about 48 K under a normal pressure (0 GPa) condition, and is dynamically stable. The superconducting mechanism is derived from a strong electroacoustic coupling effect, and the coupling constant lambda is about 1.64. The material is composed of Ge, B and C elements rich in earth crust, the raw materials are easy to obtain, the cost is low, and the large-scale preparation potential is achieved. Compared with a traditional normal-pressure superconducting material, the material disclosed by the invention has a relatively high superconducting transition temperature; compared with a high-voltage superconductor, a high-voltage environment is not needed, and the preparation and application threshold is remarkably reduced. The material can be applied to the fields of high-performance superconducting filters, superconducting nanowire single-photon detectors, small superconducting magnets and the like, and has important scientific research values and good practical application prospects.

The invention discloses a superconducting filtering coupling amplification assembly applied to a deep space exploration receiver system. The superconducting filtering coupling amplification assembly comprises a box body; the box body is divided into a first cavity and a second cavity which are mutually independent through a partition plate; a superconducting filtering coupling circuit is mounted in the first cavity; a low-temperature low-noise amplifier circuit is mounted in the second cavity; the signal output end of the superconducting filtering coupling circuit is connected with the signal input end of the low-temperature low-noise amplifier circuit through a bridging gold wire; the superconducting filter coupling circuit comprises a superconducting filter and a superconducting coupler which are integrated on the same dielectric substrate; the low-temperature low-noise amplifier circuit comprises a low-temperature low-noise amplifier chip and an amplifier biasing circuit which are integrated on the same microwave substrate. According to the invention, high-frequency-selection suppression filtering and low-noise receiving amplification of received signals can be realized, a calibration signal injection function is realized, and the amplifier is suitable for various microwave circuits, and is especially suitable for application scenes with extreme noise control requirements, such as a deep space exploration receiver and the like.

The invention relates to the technical field of communication, in particular to an anti-interference receiving front-end device which comprises a low-pass filter, a gas switch, a superconducting filter, a first radio frequency switch, a second radio frequency switch, a low-noise amplifier and a control panel. The high pulse suppression capability of the gas switch and the quick response capability of the superconducting filter are combined for use, so that the anti-interference capability of the receiving front end is improved, rear electronic components are protected from being damaged, and meanwhile, the sensitivity of a receiver can be improved by utilizing the low insertion loss and high out-of-band suppression capability of the superconducting filter.

The invention discloses a YBCO (Yttrium Barium Copper Oxide) high-temperature superconducting filter and a preparation method thereof. The preparation method comprises the following steps: preparing photosensitive resin and YBCO precursor powder; mixing photosensitive resin and YBCO precursor powder in different proportions to prepare high-temperature superconducting filter slurry and positioning frame slurry; printing a blank positioning frame with the thickness consistent with that of the single crystal substrate from the positioning frame slurry; placing the single crystal substrate in the blank body positioning frame, and printing the high-temperature superconducting filter slurry to form a superconducting filter structure blank body; and cleaning and curing the superconducting filter structure blank, and performing degreasing and sintering treatment to obtain the YBCO high-temperature superconducting filter. The method has the advantages of lower time cost and price cost and rapid forming, high precision and the like of the photocuring 3D printing technology, and the prepared YBCO high-temperature superconducting filter has enough precision and completely meets the use requirements of the YBCO high-temperature superconducting filter.

The invention discloses an electromagnetic signal receiving system with adaptive anti-interference capability, and relates to the field of antennas and receivers. According to the system, the receiving of ultra-wideband electromagnetic signals is realized by adopting a tight coupling antenna array, the low-loss transmission of a receiving link is realized by adopting a high-temperature superconducting filter, and a physical basis for adjusting a transmission zero point (notch point) of the high-temperature superconducting filter is established by loading a variable capacitance diode; the positioning and accurate filtering of interference signals are realized through establishing a database and energy discrimination, and the self-adaptive anti-interference capability is realized; according to the invention, large interference signals in a complex environment can be automatically positioned and filtered, so that the purity of received signals is improved, and the complexity of back-end processing analysis is reduced.

The utility model discloses a shielding device for superconducting filter packaging belongs to superconducting filter packaging shielding technical field, including the shell body, inner casing, the shell body upper end is provided with the end cap that can be to the shell body upper end closed, and the inner casing is located in the shell body, and the shell body inside fixedly seted up can be to the inner casing lower end opening closed support plate, the end cap is pressed on the inner casing, and the positioning groove bottom is provided with the thread hole corresponding with the mounting hole, and the end cap is fixedly connected with the support plate through screw rod, thread hole, and the screw rod is slid through the mounting hole, and the fixed sleeve of the stem of screw rod is pressed on the mounting plate on the pressure block. The application through setting a group of screw rod, not only can be to the end cap and shell body fixed connection, can also be to the inner casing fixed, and filter is fixed on the support plate simultaneously, can realize to the shell body, the inner casing, filter three's quick fixed simultaneously, also can dismantle fast, thereby being convenient for the maintenance of filter.

The application relates to the technical field of superconducting filters, in particular to a superconducting filter shielding box with a tuning structure, which comprises a bottom shell, a cover plate, a ceramic substrate, SMA joints and a bottom plate; the bottom shell is provided with openings at both ends, the bottom plate is installed at the opening at one end of the bottom shell, the ceramic substrate is adhered to the bottom plate through low-temperature-resistant conductive glue, two SMA joints are respectively fixed on the opposite two side walls of the bottom shell, one end of the SMA joint located in the bottom shell is welded with the ceramic substrate, the cover plate is arranged on the opening at the other end of the bottom shell, the cover plate is provided with two or more than two mounting holes which are uniformly distributed, tuning sleeves are arranged in the mounting holes, metal tuning columns are embedded in a part of all the tuning sleeves, and plastic tuning columns are embedded in the rest of all the tuning sleeves, so that the superconducting filter can normally work at low temperature, the performance is excellent and stable. Meanwhile, the superconducting filter shielding box with the manual tuning structure is convenient to debug and can be directly manually debugged, so that the work efficiency is greatly improved.

The invention particularly relates to an asymmetric response superconducting resonator loaded with vertical through holes and interdigital capacitors and a superconducting filter based on the resonator, and belongs to the technical field of high-temperature superconducting circuits and microwave communication. The filter comprises a dielectric substrate, a high-temperature superconducting thin film layer and a circuit constructed on the high-temperature superconducting thin film layer, the circuit comprises four single-ended grounding folded microstrip structures, an interdigital capacitor, a rectangular microstrip block grounding structure, a feeder auxiliary line, an input / output microstrip feeder and a grounding through hole, and four grounding multimode resonators are formed to provide eight pole frequencies. By adjusting the width of the rectangular microstrip block grounding structure and the length and position of the interdigital capacitor, independent regulation and control of odd-even mode frequency and flexible control of a transmission zero point are realized. An additional topological structure is not needed, selectivity and out-of-band rejection performance of the filter are remarkably improved while the size of a device is reduced and low insertion loss is kept, the filter is compatible with an existing thin film process, the miniaturization and batch requirements are met, and the industrialization potential is outstanding.

The present application relates to the technical field of microwave circuit, especially to a compact L-band multi-path superconducting filter receiving front-end component, which is composed of a low-pass filter, a limiter, a first radio frequency switch, a straight-through radio frequency cable, a superconducting band-pass filter group, a second radio frequency switch, a low-noise amplification circuit and a digital control attenuator, and forms the compact L-band multi-path superconducting filter receiving front-end component through the connection relationship among them, realizes the combination of normal-temperature devices and superconducting filter components, improves the power capacity of the filter, and ensures the normal work of the receiving link under the failure condition of low-temperature environment.

The invention discloses a miniaturized full-standard superconducting filter based on a high-temperature superconducting substrate through hole technology. Comprising a dielectric substrate, a surface high-temperature superconducting thin film layer and a thin film layer etching microstrip line topological structure filter circuit. The circuit takes three grounded dual-mode resonators as a core, and each resonator comprises two symmetrical grounded stepped impedance microstrip lines, a rectangular microstrip block for connecting the two symmetrical grounded stepped impedance microstrip lines, and a superconducting grounded through hole; the three resonators form a full-standard transverse cross coupling structure through the first non-resonant coupling structure and the second non-resonant coupling structure. The input end of the structure is connected with a first feeder line with a first auxiliary coupling microstrip line, and the output end of the structure is connected with a second feeder line with a second auxiliary coupling microstrip line. Cross coupling generates a transmission zero point outside a passband, and the line width and length of the coupling structure are adjusted to control the zero point position; the two auxiliary coupling structures enhance source load coupling, and the two auxiliary coupling structures cooperate to realize precise control of six transmission zeros. The superconducting grounding through hole technology improves the integration level, and the high-order miniaturized superconducting filter with full normative performance can be realized.

The invention discloses a high-temperature superconducting filter based on a through hole dual-mode resonator, a high-temperature superconducting substrate through hole implementation method and a radar. The method comprises the steps that a metal gold plating layer and a high-temperature superconducting thin film layer on the surface of a to-be-punched area are removed; a bonding pad area is reserved around the punching area, the metal gold plating layer is reserved, and the high-temperature superconducting thin film layer is removed; laser drilling is conducted on the to-be-drilled area through the laser drilling technology to obtain a vertical through hole, and the superconducting substrate is placed in acetone and absolute ethyl alcohol to be subjected to ultrasonic cleaning; injecting conductive silver paste into the grounding through hole and filling the grounding through hole with the conductive silver paste, and putting the superconducting substrate into a constant-temperature oven for heating and curing; conducting a conductivity test on the solidified grounding through hole; and fixing the qualified superconducting substrate on the bottom plate of the metal packaging shell through the conductive silver paste, and baking the superconducting substrate in the constant-temperature oven again to complete packaging to obtain the grounding through hole of the high-temperature superconducting substrate. Stable grounding and substrate integration of the high-temperature superconducting circuit are realized, and the filter has the characteristics of low insertion loss, high selectivity and compact structure.

This invention relates to the field of superconducting filter technology, and more particularly to a superconducting filter shielding box suitable for low-temperature environments, comprising a bottom shell, a cover plate, a ceramic substrate, SMA connectors, and a base plate. The bottom shell has openings at both ends. The base plate is installed at one opening of the bottom shell. The ceramic substrate is adhered to the base plate using low-temperature conductive adhesive. Two SMA connectors are respectively fixed to opposite side walls of the bottom shell, with one end of the SMA connector inside the bottom shell welded to the ceramic substrate. The cover plate covers the opening at the other end of the bottom shell. The cover plate has two or more evenly distributed mounting holes. Tuning sleeves are fitted inside the mounting holes. A portion of each tuning sleeve contains a metal tuning post, and the remaining portion contains a plastic tuning post, enabling the superconducting filter to operate normally at low temperatures with excellent and stable performance. It also features a manual tuning structure for convenient and direct manual adjustment, greatly improving work efficiency.