16 results about "Ferrite substrate" patented technology

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 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 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 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.

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 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.