26 results about "Ferrite substrate" patented technology

The invention discloses a ferrite and solid state combined amplitude limiting circuit and a high-power microwave front door protection device, and belongs to the field of microwave devices.The combined amplitude limiting circuit comprises a ferrite substrate, and a ferrite amplitude limiting circuit and a solid state amplitude limiting circuit which are connected with each other are arranged on the front face of the ferrite substrate. The solid-state amplitude limiting circuit comprises two amplitude limiting diodes and two transmission lines, an inductor is arranged between the two transmission lines, one amplitude limiting diode is connected with an output transmission line, and the other amplitude limiting diode is connected with the output of the microstrip amplitude limiting circuit through the transmission line; the high-power microwave front door protection device has high power capacity (hundred kW magnitude), fast response and recovery time (several ns) and high amplitude limiting isolation (higher than 32 dB) in the HPM electromagnetic environment, the ideal high-power microwave front door comprehensive protection effect is achieved, the size of the device is small, and the device can be applied to microwave receiver strong electromagnetic pulse engineering protection.

The invention discloses a composite ultra-wideband circulator based on a LiZnTi ferrite homogeneous structure. The composite ultra-wideband circulator sequentially comprises a ferrite substrate, a ferrite cylinder and a microstrip circuit from bottom to top, the ferrite cylinder is nested in the ferrite substrate, and the microstrip circuit is arranged on the upper surface of the ferrite cylinder; the ferrite substrate comprises a magnetizing body and a non-magnetizing body, and the magnetizing body is of a circular structure surrounding the ferrite cylinder; the microstrip circuit is of a single Y junction structure and comprises a sheet-shaped central round junction and three extending ends evenly distributed in the circumferential direction of the sheet-shaped central round junction, and each extending end sequentially comprises a coupling line, a converter and a microstrip line outwards with the sheet-shaped central round junction as a node. And the sheet-shaped central round knot is arranged at the center of the upper surface of the ferrite cylinder. Compared with a single ferrite circulator, the LiZnTi ferrite composite ferrite structure circulator provided by the invention has the advantage that the bandwidth is improved by 18.4%.

This utility model discloses a microstrip circulator, including a ferrite substrate and a signal conductor connected to one end face of the ferrite substrate; it also includes a side conductor and a pin; one end of the side conductor is connected to the signal conductor, and the other end is connected to the pin; the side conductor is located on the side of the ferrite substrate, and the pin is located on the side of the ferrite substrate away from the signal conductor. This microstrip circulator uses a side conductor and pins instead of existing metallized vias, and uses the side conductor and pins to connect the signal conductor and the conductor located at the other end of the ferrite substrate, which helps to simplify the manufacturing process, shorten production time, and reduce production costs.

The application discloses a method for improving the uniformity of a ferrite substrate PANTAN film, wherein a loading layer is formed on the surface of the ferrite substrate by magnetron sputtering a tantalum target material, and then secondary sputtering is carried out by rotating the ferrite substrate plane by 180 degrees, and the sputtering time ratio of the front and back secondary sputtering is 2:3, so that the uniformity can reach more than 90%, thereby greatly improving the uniformity of the PANTAN film on the ferrite substrate. Compared with the prior art, the method can greatly improve the uniformity and film layer quality of the PANTAN film, and is simple to operate, low in cost, high in consistency and suitable for batch production.

The invention provides a passive broadband non-reciprocal electromagnetic wave absorber and a manufacturing method, and the passive broadband non-reciprocal electromagnetic wave absorber comprises three layers of structures from bottom to top: a bottom layer metal reflection backboard, a ferrite substrate and a metal complementary split ring resonator (CSRR) array. Wherein the bottom metal reflection back plate, the ferrite substrate and the CSRR array are square plate-shaped structures with the same shape, and the ferrite substrate is arranged between the bottom metal reflection back plate and the CSRR array; the ferrite substrate is made of La-doped BaFe12O9, and has an asymmetric magnetic conductivity tensor characteristic; the surface layer of the CSRR array is provided with a metal complementary opening; and the CSRR array is coupled with the non-reciprocal characteristic of the ferrite substrate to form differential absorption of left-hand circularly polarized waves and right-hand circularly polarized waves.

The present invention discloses a manufacturing method for a microwave ferrite isolator substrate, comprising: magnetron sputtering a nickel-chromium-iron alloy target to deposit a bottom layer composite film on the surface of the ferrite substrate. By customizing a nickel-chromium-iron alloy target with a specific ratio, the present invention deposits a nickel-chromium-iron composite film on the ferrite substrate by magnetron sputtering. This composite film can be etched in one step with the copper plating layer. Compared with the conventional chromium or nickel-chromium bottom etching method, the plasma etching process is omitted, the production steps of the ferrite isolator substrate are simplified, and the processing efficiency of the ferrite isolator substrate is improved.

The invention relates to the technical field of microwave ferrite devices, and discloses a K-to-Ka waveband miniaturized broadband microstrip isolator, which comprises a permanent magnet, a ceramic chip, a soldering lug, a circuit layer, a resistive film and a single ferrite which are sequentially laminated from top to bottom, a single ferrite substrate is made of a gyromagnetic material, and the isolator realizes a gyromagnetic function through the single ferrite substrate. The K-to-Ka wave band miniaturized broadband microstrip isolator assists the single ferrite substrate in stably playing a gyromagnetic function, the soldering lug, the ceramic chip and the permanent magnet are stacked to assist in improving the overall performance of the isolator, and the ceramic chip can play a role in insulation and protection to avoid electrical interference between the permanent magnet and the soldering lug, so that the service life of the isolator is prolonged. The use reliability and safety of the isolator are improved, the installation space occupation in radar communication and satellite communication equipment can be reduced through the miniaturization design of the overall structure, the overall size and weight of auxiliary equipment are reduced, and the portability and space compatibility of the equipment are improved.

The utility model discloses a composite ferrite micro-strip circulator, relates to the technical field of circulators, and aims to solve the technical problems that the integral structure of the current shell is inconvenient to disassemble for maintenance and replacement and is inconvenient to operate, the composite ferrite micro-strip circulator comprises a shell, a fixed block, a top cover and an external assembly, an assembling opening is formed in the middle of the shell, a full-ferrite substrate is arranged at the bottom end in the assembling opening, positioning openings are formed in the two sides of the shell, side interfaces are formed in the front end face and the rear end face of the shell, the positioning openings and the side interfaces are connected into the assembling opening, and the fixing blocks are inserted into the positioning openings in a sliding mode. The external assembly is slidably inserted into the side interface, and a ferrite wafer is fixed to the lower end face of the top cover and inserted into the assembling opening. The utility model has the advantages that the assembly type connecting structure is convenient to maintain and replace, and the overhaul difficulty is reduced.

The invention relates to the technical field of electronic materials, in particular to a large-size high-dielectric-constant gyromagnetic ferrite substrate and a preparation method thereof.The preparation method comprises the following steps that S1, high-dielectric-constant Bi-YIG gyromagnetic ferrite powder and an additive are subjected to ball milling and mixing to prepare tape casting slurry; s2, defoaming the tape casting slurry, and carrying out tape casting to obtain a Bi-YIG gyromagnetic ferrite raw ceramic material strip; s3, cutting and laminating the raw ceramic material belt, performing hot isostatic pressing by using a warm isostatic press to obtain a raw ceramic blank sheet, and performing cold isostatic pressing on the raw ceramic blank sheet by using a cold isostatic press to obtain a compact raw ceramic blank sheet; and S4, stacking a plurality of the compact green ceramic pieces, placing Bi-YIG gyromagnetic ferrite polishing substrates with the same size as the green ceramic pieces between every two layers of compact green ceramic pieces as clamping pieces for separation, placing Bi-YIG gyromagnetic ferrite polishing cover pieces at the top ends, and finally placing the stacked green ceramic pieces on a setter plate.

The invention discloses a high harmonic suppression circulator of a defected ground structure (DGS), which comprises a central circuit and a matching medium, the central circuit comprises a grounding plate, a ferrite substrate and a nonreciprocal junction from top to bottom, the grounding plate is provided with a grid structure etched by the DGS, and distributed capacitance and distributed inductance in circuit transmission are changed. A high-harmonic suppression circulator with a defected ground structure (DGS) plays a role in stop band, generates resonance at some frequency points, and achieves the effect of improving the harmonic suppression capability.

The present application belongs to the field of electronic information functional materials and microelectronic devices, and relates to a microwave ferrite material, and particularly provides an LTCC high-curie-temperature NiZn ferrite substrate material and a preparation method thereof, to solve the defects of the existing low-temperature sintering NiCuZn ferrite substrate material, such as low curie temperature, high microwave magnetic loss and dielectric loss, low saturation magnetization and low dielectric constant; the present application uses Cu-doped high Ni / Zn ratio NiZn ferrite as a main material, and uses Bi2O3-CuO composite eutectic mixture as an auxiliary material, and the two are low-temperature co-fired to form a substrate material, which not only has a low sintering temperature (about 900 DEG C), but also has excellent microwave characteristics: high curie temperature (about 302 DEG C), low ferromagnetic resonance line width (about 100 Oe), low dielectric loss (loss tangent value about 8*10 ‑4 ) and high saturation magnetization (about 4959 Guass), which not only meets the requirements of the LTCC process, but also has excellent magnetic properties of the key substrate material required by the microwave ferrite device.

The invention discloses a polarized reconfigurable microstrip patch antenna system based on a ferrite substrate. The system comprises an antenna body and a driving control unit, the antenna body comprises a ferrite substrate, a microstrip patch unit etched on the ferrite substrate and four groups of electromagnetic coils arranged around the edge of the ferrite substrate; and the driving control unit is used for generating a synthetic magnetic field in the ferrite substrate by controlling the current direction and magnitude of the four groups of coils, so that the equivalent impedance and surface current distribution of the microstrip patch are changed, and the polarization mode of the antenna is further changed. The system has the advantages of flexible polarization mode, low power consumption in operation, high integration level, strong anti-interference capability and the like.

The application discloses a composite gyromagnetic ferrite substrate material for an LTCF phase shifter and belongs to the technical field of electronic ceramic materials. 4+ 3+ 3+ The main LiZn ferrite is selected from Ti 4+ , Mn 3+ , Bi 3+ ion substituted iron-deficient formula, which ensures low-temperature sintering and has high saturation magnetization and low ferromagnetic resonance line width; the auxiliary SrM ferrite is selected from micro-nano structure particles with high Curie temperature, the SrM ferrite with the structure has high sintering activity, and is beneficial to forming a multiple dense microstructure mainly with fine grains in the low-temperature sintering process, so that the material has high residual magnetism ratio and high saturation magnetization.

The invention relates to the technical field of microwave ferrite devices, and discloses an X-band miniaturized microstrip ferrite circulator, which comprises a magnetic conductive sheet, a ferrite substrate, a microstrip circuit, a ceramic sheet, a permanent magnet and the like. And the ferrite substrate and the positioning boss are integrally formed, so that the number of parts is reduced, the weight is reduced, the space occupied by an assembly gap is avoided, and the product reliability is enhanced. The microstrip circuit is arranged on the upper surface of the ferrite substrate, the upper surface of the microstrip circuit is provided with the single Y-shaped disc central section and uniformly provided with the fan-shaped regions and the grooves, the circulator function is realized on the surface of the limited substrate, and the occupied area of the circuit is reduced. The ceramic chip and the permanent magnet are sequentially arranged on the upper surface of the micro-strip circuit, all the components are stacked, excessive occupation of transverse space is avoided, the overall structure is simplified, the material consumption is reduced, the production cost is reduced, the weight is reduced, the overall size and weight burden of the system are effectively reduced, and stable operation of the system is guaranteed.

The utility model discloses a powder collecting mechanism for ferrite substrate punching, which relates to the technical field of ferrite substrate processing and comprises an operating table, a cleaning port is arranged at the top of the operating table, a filter screen is embedded in the cleaning port, a stop block is fixedly arranged on one side of the top of the operating table, a gas collecting box is fixedly mounted at the top of the stop block, and a gas outlet is formed in the gas collecting box. An air cylinder is fixedly installed at the top of the air collecting box, a piston plate is arranged in the air collecting box in a sliding mode, the driving end of the air cylinder is fixedly connected with the piston plate, and an air hole and an air outlet hole are formed in the top and one side of the air collecting box; when the air cylinder runs, the air cylinder extends out of the driving end, the piston plate in the air collecting box can push the piston plate to push a large amount of air downwards due to stretching and retracting of the air cylinder, and the air enters the hose from the air outlet hole and is discharged from the spray head to form a bundle of air columns with certain impact force; and powder on the check block can be blown off more intensively, so that cleaning is facilitated.

The invention discloses a preparation method and system of a ferrite isolator and a microwave system. The method comprises the following steps: forming an undercut structure on the surface of a ferrite substrate based on a preset target product unit range; preparing a target resistance layer on the undercut structure through a physical deposition method; preparing a composite metal layer on the target resistance layer, and obtaining an initial product structure based on the ferrite substrate, the target resistance layer and the composite metal layer; and performing unitization processing on the initial product structure based on the target product unit range to obtain a target isolator. According to the invention, the preparation of the isolator resistor can be better controlled, the isolator with good radio frequency performance and qualified resistance is obtained, and the product yield is improved.

The utility model discloses an ultra wide band multi-nested microstrip two-section circulator, which comprises a base, a ceramic substrate, a microstrip circuit, ferrite, a ferrite substrate, a ceramic gasket and a samarium cobalt permanent magnet, the ferrite substrate is nested in a hole groove in the ceramic substrate through a nesting process to form a whole, the ceramic substrate is welded on the base through welding flux, the microstrip circuit is arranged on the upper surface of the ferrite substrate, the ceramic gasket is arranged on the microstrip circuit, and the samarium-cobalt permanent magnet is arranged on the ceramic gasket; the circulator is simple in structure, is suitable for surface mounting and microcircuit integration, and has the obvious advantages of good consistency, batch production, miniaturization and wide frequency band compared with a traditional circulator.

The utility model relates to the technical field of automatic testing, in particular to a positioning mechanism for ferrite substrate processing, which comprises a base, a clamp body is fixedly mounted at the top of the base, fixing rods are fixedly mounted at the top of the clamp body, and the fixing rods are annularly and uniformly arranged at the top of the clamp body. The surface of the fixing rod is sleeved with a detection device. According to the utility model, electric appliances related to the positioning mechanism are all externally connected with a power supply, the positioning dielectric sheet is firstly sleeved on the fixed rod, and then the ferrite substrate is placed on the upper side of the fixed rod; after installation, the air cylinder fixed on the positioning seat is started, at the moment, the piston rod starts to extend to drive the clamp cavity shell to clamp the ferrite substrate, at the moment, the detection device is started, and the detection probe measures the position of the ferrite substrate. And the ferrite substrate can be adjusted by detecting the numerical value displayed by the probe, so that the concentricity of the ferrite substrate during mounting and processing is ensured.

This invention discloses a magnetic clipping antenna based on nonlinear loss effects, belonging to the field of electromagnetic protection technology. The antenna includes a ferrite substrate, a ground layer, a permanent magnet, and a microstrip structure. The ferrite substrate exhibits tensor permeability characteristics under a DC bias magnetic field, utilizing the spin wave nonlinear loss effect to achieve adaptive attenuation of high-power signals. The microstrip structure employs a helical radiator, which enhances the local radio frequency magnetic field, reduces the nonlinear effect trigger threshold, and improves clipping efficiency. This invention integrates antenna radiation functionality with high-power microwave clipping protection functionality, featuring simple structure, high power capacity, low small-signal transmission loss, and high-power adaptive clipping, effectively achieving electromagnetic protection at the front end of electronic systems.

The invention discloses a silver / titanium dioxide bonding agent for metalizing the surface of a ferrite substrate. According to the method, the surface of the ferrite substrate is coated with the titanium dioxide coupling agent containing silver ions, and the adhesion layer with relatively strong adhesion is formed on the surface of the substrate through high-temperature sintering treatment, so that the method can be applied to metallization of the ferrite substrate. After coating and heat treatment, the titanium dioxide adhesion layer not only significantly improves the bonding strength of the copper layer on the ferrite surface, but also reduces the doped silver ions into dispersed silver nanoparticles in the sintering process, and can be used as an active catalytic center to effectively promote the proceeding of the subsequent chemical copper plating reaction. The process is simple and convenient, the obtained modified layer has excellent adhesive force and catalytic activity, an efficient and controllable new way is provided for metallization treatment of the ferrite substrate, and the method is suitable for the field of preparation of electronic devices, magnetic elements and functional composite materials.

The present invention discloses a high-power microwave adaptive protection device based on gyromagnetic materials, which belongs to the field of microwave technology. The device includes a YIG ferrite substrate, a ground plate covering the back of the ferrite substrate, an input microstrip line, an N-order parallel coupled microstrip resonant structure, an output microstrip line arranged on the front of the ferrite substrate and connected in sequence, and a pair of permanent magnets arranged on both sides of the ferrite substrate and parallel to the microwave magnetic field. The present invention loads a multi-order parallel coupled microstrip resonant structure on the YIG substrate, so that the device has both out-of-band frequency domain filtering protection capabilities and in-band frequency selective power limiting protection capabilities, realizing the integration of the frequency domain filtering module and the power limiting module in the HPM protection technology, greatly reducing the volume of the microwave front-end protection system; at the same time, the microwave magnetic field is greatly enhanced by the multi-order parallel coupled microstrip resonant structure, thereby strengthening the magnetic energy coupling between the microwave magnetic field and the ferrite material and reducing the initial limiting power.

The application relates to the technical field of microwave ferrite devices, and discloses a miniaturized X-band microstrip ferrite circulator, which comprises a magnetic conductive sheet, a ferrite substrate, a microstrip circuit, a ceramic sheet and a permanent magnet and the like. The ferrite substrate is arranged on the upper surface of the magnetic conductive sheet, the ferrite substrate is provided with a positioning boss and is integrally formed with the magnetic conductive sheet, the number of components is reduced, the weight is lowered, the assembly gap is avoided from occupying space, and the product reliability is enhanced. The microstrip circuit is arranged on the upper surface of the ferrite substrate, the upper surface of the microstrip circuit is provided with a single Y-shaped disc center section and uniformly arranged fan-shaped areas and grooves, the circulator function is realized on the limited substrate surface, and the occupied area of the circuit is reduced. The ceramic sheet and the permanent magnet are sequentially arranged on the upper surface of the microstrip circuit, the components are stacked and arranged, the transverse space is avoided from being excessively occupied, the overall structure is simplified, the material consumption is reduced, the production cost is lowered, the weight is reduced, the overall volume and weight burden of the system are effectively reduced, and the stable operation of the system is ensured.

The utility model discloses a ka-band low-loss high-power microstrip double-junction isolator which is sequentially provided with a base (1), a microwave ferrite substrate (2), a thin-film resistance layer (3), a microstrip circuit (4) and a permanent magnet (5) from bottom to top. The microstrip circuit (4) comprises a pair of main body discs (41), each main body disc (41) is connected with a pair of branch leads (42) and a central lead (43), and the two main body discs (41) are connected through the branch leads; a notch (41a) is formed in the outer edge of the main body disc (41); a pin of the central lead (43) is connected to the thin-film resistor layer (3) and comprises a straight section (43a), a 1 / 4 arc-shaped section (43b), a horizontal extension section (43c) and an arc-shaped bent section (43d); and the permanent magnet (5) is connected to the main body disc (41). The utility model has the advantages that the isolation performance is effectively improved, the miniaturization is maintained, and meanwhile, the high-power processing capability and the low-loss function are realized.

The application relates to a C-band self-biased circulator with a high-frequency filtering function and relates to the technical field of microwave / millimeter wave passive devices. The circulator comprises a composite substrate and a microstrip circuit formed on the composite substrate; wherein the composite substrate is obtained by gradually embedding a first ferrite substrate, a second ferrite substrate and a dielectric substrate in a concentric circle mode from inside to outside. The ferrite substrate is composed of a high-saturation-magnetization ferrite inner core and a low-saturation-magnetization ferrite outer ring, the difference in permeability of the two can excite a perimeter mode at the boundary, and the working bandwidth of the circulator can be significantly widened. Meanwhile, the center circle is matched with an asymmetric stepped impedance transformer, which not only ensures high isolation and good matching of the main band, but also forms a controlled filtering / trap function in the high-frequency band, thereby realizing the dual functions of 'band pass + band out suppression', and facilitating the system to suppress high-frequency interference or meet the multi-frequency coexistence requirement.

The invention discloses a high-temperature-resistant and corrosion-resistant ferrite NFC (Near Field Communication) structure and a preparation method thereof. The ferrite NFC structure comprises a ferrite body and a flexible coil body, the ferrite body sequentially comprises a ferrite substrate layer, a ferrite transition layer and a ferrite protection layer from bottom to top, the ferrite substrate layer and the flexible coil body are mutually fixed, and the ferrite substrate layer comprises a La2O3 and CoO co-doped SrFe12O19 material. According to the high-temperature-resistant and corrosion-resistant ferrite NFC structure provided by the invention, the ferrite substrate layer is modified through La-Co co-doping and nano Al2O3 enhancement, so that the temperature resistance and the mechanical strength are remarkably improved; the Ni-Zn ferrite transition layer with matched thermal expansion coefficients is adopted to effectively relieve the welding stress; and in combination with a compact nano structure of the PI-SiO2 composite protective layer, excellent surface flatness and corrosion resistance are realized. Compared with a conventional structure, the product can still keep stable magnetic performance and interface integrity after high-temperature welding, and the surface damage resistance is remarkably improved.

The invention discloses a multilayer medium composite substrate, a multilayer medium nested MEMS microwave device and a preparation method thereof, and compared with the prior art, the multilayer medium composite substrate and the multilayer medium nested MEMS microwave device at least have the following beneficial effects that an inorganic salt adhesive is added between ferrite substrates to combine different materials, and the multilayer medium composite substrate and the multilayer medium nested MEMS microwave device have the advantages that the adhesive can be cured at room temperature, so that the bonding effect is good; the high temperature resistance is good, the density is high, and the reliability of material substrate compounding is greatly improved. Furthermore, according to the invention, heat treatment and temperature conditions after bonding are given, and bonding layers with different strengths can be obtained according to different bonding requirements. According to the multilayer medium nested MEMS microwave device provided by the invention, the line precision of a circuit can be obviously improved, and when the composite ferrite substrate is packaged in a silicon-based cavity, the device has better reliability.