A miniaturized X-band microstrip ferrite circulator

Abstract

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.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of microwave ferrite devices, in particular to a miniaturized X-band microstrip ferrite circulator. BACKGROUND

[0002] The X-band microstrip ferrite circulator is a key passive component in the field of microwave communication, radar system, etc., mainly used for realizing one-way transmission of microwave signals, avoiding mutual interference between signals of different ports, and thus ensuring the stability and accuracy of signal transmission of the entire system, and the degree of miniaturization and lightness of the circulator directly affects the system integration efficiency and overall performance.

[0003] In the prior art, the ferrite substrate and the positioning structure are designed in a split type, which requires additional assembly of independent positioning components, which not only increases the overall component quantity of the circulator, directly leading to the increase of product weight, but also occupies more space due to the inevitable fitting gap in the assembly process, and at the same time, the microstrip circuit of the existing circulator relies on a larger substrate surface space for layout to realize signal circulation function, lacks efficient utilization structure of the surface space, resulting in excessive occupation of circuit area, which is not conducive to product miniaturization; and in some products, the permanent magnet, the insulating component and the microstrip circuit are installed in a transverse distribution manner, which excessively occupies the transverse space, and the overall structure is complex and requires more material consumption, which not only increases the production cost, but also increases the overall volume and weight of the circulator, which brings a great burden to system integration. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides an X-band miniaturized microstrip ferrite circulator to solve the problems raised in the background art.

[0005] To achieve the above purpose, the present application provides the following technical scheme: an X-band miniaturized microstrip ferrite circulator, comprising:

[0006] A magnetic conducting sheet, the upper surface of the magnetic conducting sheet is provided with a ferrite substrate;

[0007] A 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-type disc center section, the surface of the single Y-type disc center section is uniformly provided with a fan-shaped area, and the upper surface of the microstrip circuit is uniformly provided with a groove;

[0008] A ceramic sheet is arranged on the upper surface of the microstrip circuit, the upper surface of the ceramic sheet is provided with a permanent magnet, the upper surface of the ferrite substrate is uniformly provided with a positioning boss, and the positioning boss and the ferrite substrate are designed in one piece.

[0009] Preferably, the inner wall of the groove is uniformly provided with protrusions distributed at intervals along the length direction of the groove, the protrusions are integrally formed with the center section of the single-Y type disc, and the extension direction of the protrusions is consistent with the extension direction of the groove.

[0010] The design of the protrusions can optimize the electromagnetic field distribution in the groove area, avoid excessive concentration of local field strength through the structure distributed at intervals, reduce energy loss in the signal transmission process, and improve the insertion loss performance of the circulator. Meanwhile, the protrusions are integrally formed with the center section of the single-Y type disc, which can reduce the connection gap between components, reduce the influence of contact resistance on electrical performance, and also enhance the stability of the overall structure, avoid the protrusions from falling off or shifting in long-term use. In the miniaturization scenario, this structure does not need to increase the size of the device, but can improve the isolation of the circulator through electromagnetic field adjustment, to meet the requirements of stability and anti-interference for X-band signal transmission.

[0011] Preferably, a gap is left between the end of the protrusion and the end of the groove, and the gap is arranged along the length direction of the groove.

[0012] The gap can serve as a buffer space for thermal expansion and contraction, avoiding rigid collision between the protrusion and the end of the groove due to thermal expansion when the circulator changes in temperature, which can cause cracks or deformation of the microstrip circuit, and further affect the integrity of the signal transmission path. Meanwhile, the gap can accommodate small impurities or excess solder that may be generated during assembly, preventing the accumulation of impurities from causing poor fit between the protrusion and the groove, and avoiding short circuit or signal leakage problems. In addition, the existence of the gap does not affect the adjustment of the electromagnetic field by the protrusion, but can ensure that the protrusion always maintains a stable structure under different working environments through reasonable space reservation, further improving the environmental adaptability and service life of the circulator.

[0013] Preferably, the surface of the ceramic sheet is uniformly provided with guide protrusions, and the inner wall of the permanent magnet is provided with guide grooves at positions corresponding to the guide protrusions.

[0014] The cooperation structure of the guide protrusions and the guide grooves can realize fast and accurate positioning of the permanent magnet on the ceramic sheet, avoid deviation of the permanent magnet during assembly, ensure that the magnetic field generated by the permanent magnet uniformly covers the ferrite substrate, thereby ensuring the stability of the magnetic permeability of the circulator and reducing the problem of reduced isolation caused by uneven magnetic field distribution. Meanwhile, this guide structure can improve the assembly consistency, so that the installation position deviation of the permanent magnet of each circulator is controlled within a very small range, ensuring the performance uniformity of mass-produced products. In addition, the guide protrusions can also enhance the connection strength between the permanent magnet and the ceramic sheet, prevent the permanent magnet from shifting in a vibration or impact environment, and further improve the structural reliability and anti-mechanical interference capability of the circulator.

[0015] Preferably, the top of the positioning boss is provided with a chamfer, and the chamfer is arranged around the outer periphery of the positioning boss.

[0016] The chamfer design of the top of the positioning boss can guide the assembly process, facilitate the quick fitting of the microstrip circuit or the ceramic sheet on the positioning boss, avoid scratching the surface of the microstrip circuit or the inner wall of the ceramic sheet by the sharp edges of the positioning boss, and protect the structural integrity of the key components. At the same time, the chamfer can reduce the stress concentration at the top of the positioning boss, prevent the positioning boss from breaking due to stress concentration during long-term use, and improve the structural strength of the ferrite substrate. In addition, the chamfer does not affect the positioning accuracy of the positioning boss, but can make the microstrip circuit and the ferrite substrate fit more closely through the smooth transition surface, reduce the air gap between the layers to interfere with the electromagnetic field, and optimize the electrical performance stability of the circulator.

[0017] Preferably, the edge of the ceramic sheet is provided with an arc-shaped notch, and the arc-shaped notch is distributed along the circumferential direction of the ceramic sheet.

[0018] The arc-shaped notch at the edge of the ceramic sheet can achieve lightweight design without reducing the support strength and insulation performance of the ceramic sheet, meet the overall demand for miniaturization of the circulator, and reduce the overall weight of the product. At the same time, the arc-shaped notch can increase the heat dissipation area of the ceramic sheet, help to dissipate the heat generated by the permanent magnet during operation and the transmission loss heat of the microstrip circuit, avoid high temperature affecting the magnetic properties of the ferrite substrate, prevent temperature drift of the circulator, and ensure the stability of signal transmission in different temperature environments. In addition, the arc-shaped notch can also serve as a directional marker during assembly, facilitating the operator to quickly distinguish the installation direction of the ceramic sheet, improving the assembly efficiency, and reducing performance failures caused by misassembly.

[0019] Preferably, the edge of the ferrite substrate is provided with a positioning notch, and the positioning notch is aligned with the edge of the magnetic conducting sheet.

[0020] The positioning notch at the edge of the ferrite substrate is aligned with the edge of the magnetic conducting sheet, which can achieve quick and accurate alignment of the two, ensure that the center axes of the ferrite substrate and the magnetic conducting sheet are completely coincident, avoid position deviation of the magnetic field loop caused by position deviation, reduce magnetic loss, and improve the magnetic performance efficiency of the circulator. At the same time, this positioning structure can improve the interlayer assembly precision, reduce the gap between the ferrite substrate and the magnetic conducting sheet, optimize the magnetic field conduction path, further reduce the magnetic loss, and ensure the stability of the isolation and insertion loss performance of the circulator. In addition, the positioning notch can serve as a reference mark during production, facilitating the identification and positioning of automatic assembly equipment, improving production efficiency, and ensuring the assembly consistency of batch-produced products, thereby reducing product performance fluctuations.

[0021] Preferably, the branch end of the single Y-shaped disc center section is provided with an extension section, and the extension section extends towards the edge of the microstrip circuit.

[0022] The extension section of the branch end of the single-Y type disc center node can prolong the effective length of the signal transmission path, optimize the impedance matching characteristics of the microstrip circuit, reduce the reflection loss of the signal in the transmission process, improve the insertion loss performance of the circulator, and ensure efficient transmission of X-band signals. The design of the extension section can also increase the connection area between the single-Y type disc center node and other parts of the microstrip circuit, enhance the structural stability, prevent the branch end from breaking or falling off due to stress concentration during long-term use, and improve the service life of the microstrip circuit. In addition, in the miniaturization design, the extension section can flexibly adapt to the edge size of the microstrip circuit, without the need for additional expansion of the circuit area to achieve impedance matching optimization, meeting the dual requirements of circulator miniaturization and high performance.

[0023] Preferably, the edge of the magnetic conducting sheet is provided with a protruding block corresponding to the positioning notch of the ferrite substrate;

[0024] The protruding block of the edge of the magnetic conducting sheet cooperates with the positioning notch of the ferrite substrate to realize mechanical positioning and locking of the two, prevent the ferrite substrate from sliding on the surface of the magnetic conducting sheet after assembly, ensure the stability of the magnetic field loop, and reduce the magnetic performance fluctuations caused by relative displacement. At the same time, the cooperation of the protruding block and the positioning notch can further improve the adhesion of the two, reduce the air gap between the layers, optimize the magnetic field conduction efficiency, reduce the magnetic loss, and thus ensure that the isolation and insertion loss performance of the circulator meet the design requirements. In addition, this structure can realize reliable positioning without the need for additional adhesives or fasteners, simplify the assembly process, and avoid the impact of adhesive aging or fastener rust on product performance, thereby improving the long-term reliability of the circulator.

[0025] Preferably, the edge of the microstrip circuit is provided with a positioning groove corresponding to the positioning boss of the ferrite substrate;

[0026] The positioning groove of the edge of the microstrip circuit cooperates with the positioning boss of the ferrite substrate to realize accurate positioning of the microstrip circuit on the ferrite substrate, ensure that the center of the microstrip circuit is completely coincident with the center of the ferrite substrate, avoid uneven electromagnetic field distribution caused by positional deviation, reduce energy loss in the signal transmission process, and improve the electrical performance stability of the circulator. The design of the positioning groove can also enhance the connection stability of the microstrip circuit and the ferrite substrate, prevent the microstrip circuit from shifting in a vibration or impact environment, avoid changes in the signal transmission path, and further ensure the working reliability of the circulator. In addition, this positioning structure can simplify the assembly process, reduce the precision requirements of manual assembly, improve production efficiency, and ensure that the installation position of the microstrip circuit of each product is consistent in batch production, thereby reducing performance differences.

[0027] Compared with the prior art, the present application provides a miniaturized microstrip ferrite circulator for X-band, which has the following advantages:

[0028] The X-band miniaturized microstrip ferrite circulator is provided with an integrally formed ferrite substrate and positioning boss, which reduces the number of components to reduce the overall weight, avoids the space occupation caused by assembly gap, and enhances product reliability; the microstrip circuit surface is uniformly provided with fan-shaped areas and grooves, and a single Y-shaped disc center is installed, which can realize the circulator function on the limited substrate surface, greatly reducing the circuit area and further promoting the overall miniaturization; the upper surface of the microstrip circuit is provided with a ceramic sheet and a permanent magnet in sequence, and each component is installed in a top-down stacking manner, which avoids excessive occupation of horizontal space, simplifies the overall structure, reduces the amount of materials, reduces the production cost, further reduces the weight, effectively reduces the overall volume and weight burden of the system, and ensures stable operation of the system. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present application;

[0030] Figure 2 It is an exploded perspective view of the present application;

[0031] Figure 3 It is a structural schematic diagram of the microstrip circuit of the present application;

[0032] Figure 4 It is a structural schematic diagram of the ceramic sheet of the present application;

[0033] Figure 5 It is a structural schematic diagram of the permanent magnet of the present application.

[0034] In the figure: 1, magnetic conducting sheet; 2, ferrite substrate; 21, positioning boss; 3, microstrip circuit; 31, fan-shaped area; 32, single Y-shaped disc center; 33, groove; 34, ridge; 4, ceramic sheet; 41, guide ridge; 5, permanent magnet; 51, guide groove. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0036] The present application provides a technical solution, an X-band miniaturized microstrip ferrite circulator, please refer to Figure 1 , including a magnetic conducting sheet 1, the upper surface of the magnetic conducting sheet 1 is provided with a ferrite substrate 2;

[0037] Please refer to Figure 3, microstrip circuit 3, set in the upper surface of ferrite substrate 2, the upper surface of microstrip circuit 3 is mounted with single Y type disc center section 32, the surface of single Y type disc center section 32 is uniformly provided with sector 31, the upper surface of microstrip circuit 3 is uniformly provided with groove 33;

[0038] Please refer to Figure 2 , ceramic sheet 4, set in the upper surface of microstrip circuit 3, the upper surface of ceramic sheet 4 is mounted with permanent magnet 5, the upper surface of ferrite substrate 2 is uniformly provided with positioning boss 21, positioning boss 21 is integrally formed with ferrite substrate 2.

[0039] In order to meet the port position, the electrical performance in the working frequency band, and the size miniaturization, the single Y type disc center section 32 with the tip of each 120 degree sector 31 being cut is located on the ferrite substrate 2, the groove 33 is designed on the disc section, and the matching branch connected outside the single Y type disc center section 32 is used to match the resonant frequency of the ferrite. The matching microstrip circuit 3 is arranged in the arc structure with three levels outside the center section, so as to reduce the size of the product. The cylindrical permanent magnet 5 and ceramic sheet 4 with appropriate diameter and thickness are selected, so that the ferrite substrate 2 is in a bias magnetic field H0 with appropriate size, and the product reaches good electrical performance through the adjustment of the actual sample.

[0040] In order to meet the higher electrical performance in the whole X wave band under the condition of smaller size, the single ferrite structure is used under the condition of considering the time and economic cost comprehensively. According to the demand and the simulation design result of the simulation software, the type of material and the overall size of the circulator, the structure size of the center section, the position of the port and the magnetic steel, and the position and size of the matching circuit outside the center section are preliminarily determined.

[0041] In order to meet the higher performance under the condition of smaller size, the saturation magnetization is selected after considering the magnetic saturation strength, line width, spin characteristics, resonant frequency and other characteristics of the ferrite gyromagnetic material.

[0042] The ferrite substrate 2 is mounted on the upper surface of the magnetic conducting sheet 1, and the ferrite substrate 2 is provided with a positioning boss 21 formed in one piece, which does not need additional positioning components, thereby reducing the number of components to reduce the overall weight, avoiding the space occupation caused by the assembly gap, and improving the stability of the structure connection, thereby enhancing the product reliability; the microstrip circuit 3 is arranged on the upper surface of the ferrite substrate 2, and the surface is uniformly provided with fan-shaped areas 31 and grooves 33, and a single Y-shaped disc center section 32 is mounted, which is a compact circuit layout design, and can realize the function of the circulator on the limited substrate surface, greatly reducing the circuit area, and further promoting the miniaturization of the overall volume; the ceramic sheet 4 and the permanent magnet 5 are arranged in sequence on the upper surface of the microstrip circuit 3, and each component is arranged in a top-down stacking manner, thereby avoiding excessive occupation of horizontal space, simplifying the overall structure, reducing the amount of material, and further reducing the weight while reducing the production cost; the circulator has the characteristics of small size and light weight, and when applied to systems such as space research, broadcast satellites, fixed communication service satellites, and earth exploration satellites, it can effectively reduce the overall volume and weight burden of the system, and the high reliability characteristics can ensure stable operation of the system.

[0043] Please refer to Figure 3 The inner wall of the groove 33 is uniformly provided with protrusions 34 distributed at intervals along the length direction of the groove 33, and the protrusions 34 are formed in one piece with the single Y-shaped disc center section 32, and the extension direction of the protrusions 34 is consistent with the extension direction of the groove 33.

[0044] The design of the protrusions 34 can optimize the electromagnetic field distribution in the groove 33 area, and the interval distribution structure can avoid excessive concentration of local field strength, thereby reducing energy loss in the signal transmission process and improving the insertion loss performance of the circulator. At the same time, the protrusions 34 are formed in one piece with the single Y-shaped disc center section 32, which can reduce the connection gap between components, reduce the influence of contact resistance on electrical performance, and also enhance the stability of the overall structure, avoiding the falling or displacement of the protrusions 34 during long-term use. In the miniaturization scenario, this structure does not need to increase the size of the device, but can improve the isolation of the circulator through electromagnetic field adjustment to meet the stability and anti-interference requirements of X-band signal transmission.

[0045] The end of the protrusion 34 and the end of the groove 33 are left with a gap, and the gap is arranged along the length direction of the groove 33;

[0046] The gap can serve as a buffer space for thermal expansion and contraction, avoiding rigid collision between the convex ridge 34 and the end of the groove 33 due to thermal expansion when the circulator changes in temperature, causing cracks or deformation of the microstrip circuit 3, and further affecting the integrity of the signal transmission path. At the same time, the gap can accommodate small impurities or excess solder that may be generated during assembly, preventing impurities from accumulating to cause poor fit of the convex ridge 34 and the groove 33, and avoiding short circuit or signal leakage problems. In addition, the presence of the gap does not affect the adjustment of the electromagnetic field by the convex ridge 34, but rather ensures that the convex ridge 34 always maintains a stable structure in different working environments, further improving the environmental adaptability and service life of the circulator.

[0047] Referring to Figure 4 The surface of the ceramic sheet 4 is uniformly provided with a guide ridge 41, referring to Figure 5 The inner wall of the permanent magnet 5 is provided with a guide groove 51 at the corresponding position of the guide ridge 41;

[0048] The matching structure of the guide ridge 41 and the guide groove 51 can realize fast and accurate positioning of the permanent magnet 5 on the ceramic sheet 4, avoid deviation of the permanent magnet 5 during assembly, ensure that the magnetic field generated by the permanent magnet 5 uniformly covers the ferrite substrate 2, and further ensure the stability of the magnetic permeability of the circulator, reducing the problem of reduced isolation caused by uneven magnetic field distribution. At the same time, the guide structure can improve the assembly consistency, so that the installation position deviation of the permanent magnet 5 of each circulator is controlled within a very small range, ensuring the performance uniformity of mass-produced products. In addition, the guide ridge 41 can also enhance the connection strength between the permanent magnet 5 and the ceramic sheet 4, prevent displacement of the permanent magnet 5 in a vibration or impact environment, and further improve the structural reliability and anti-mechanical interference capability of the circulator.

[0049] The top of the positioning boss 21 is provided with a chamfer, and the chamfer is arranged around the outer periphery of the positioning boss 21;

[0050] The chamfer design at the top of the positioning boss 21 can play a guiding role during assembly, facilitating the quick fitting of the microstrip circuit 3 or the ceramic sheet 4 on the positioning boss 21, avoiding scratching the surface of the microstrip circuit 3 or the inner wall of the ceramic sheet 4 by the sharp edge of the positioning boss 21, and protecting the structural integrity of the key components. At the same time, the chamfer can reduce the stress concentration at the top of the positioning boss 21, prevent the positioning boss 21 from breaking due to stress concentration during long-term use, and improve the structural strength of the ferrite substrate 2. In addition, the chamfer does not affect the positioning accuracy of the positioning boss 21, but rather enables the microstrip circuit 3 and the ferrite substrate 2 to fit more closely through the smooth transition surface, reducing the interference of air gap between the layers on the electromagnetic field, and optimizing the electrical performance stability of the circulator.

[0051] The edge of the ceramic sheet 4 is provided with an arc-shaped notch, and the arc-shaped notch is distributed along the circumferential direction of the ceramic sheet 4;

[0052] The arc-shaped notch at the edge of the ceramic sheet 4 can achieve lightweight design without reducing the support strength and insulation performance of the ceramic sheet 4, meet the overall demand of the circulator miniaturization, and reduce the overall weight of the product. At the same time, the arc-shaped notch can increase the heat dissipation area of the ceramic sheet 4, help to dissipate the heat generated by the permanent magnet 5 during operation and the transmission loss heat of the microstrip circuit 3, avoid the influence of high temperature on the magnetic properties of the ferrite substrate 2, prevent the circulator from appearing temperature drift, and ensure the stability of signal transmission in different temperature environments. In addition, the arc-shaped notch can also be used as a direction mark during assembly, which can help the operator to quickly distinguish the installation direction of the ceramic sheet 4, improve the assembly efficiency, and reduce the performance failure caused by misassembly.

[0053] The edge of the ferrite substrate 2 is provided with a positioning notch, and the positioning notch is aligned with the edge of the magnetic conducting sheet 1;

[0054] The positioning notch at the edge of the ferrite substrate 2 is aligned with the edge of the magnetic conducting sheet 1, which can realize the rapid and accurate positioning of the two, ensure that the center axes of the ferrite substrate 2 and the magnetic conducting sheet 1 are completely coincident, avoid the deviation of the magnetic field loop caused by the position deviation, reduce the magnetic loss, and improve the magnetic performance efficiency of the circulator. At the same time, the positioning structure can improve the assembly precision between layers, reduce the gap between the ferrite substrate 2 and the magnetic conducting sheet 1, optimize the magnetic field conduction path, further reduce the magnetic loss, and ensure the stability of the isolation and insertion loss performance of the circulator. In addition, the positioning notch can be used as a reference mark in the production process, which can facilitate the identification and positioning of automatic assembly equipment, improve the production efficiency, ensure the assembly consistency of batch production products, and reduce the performance fluctuation of products.

[0055] The branch end of the single Y-shaped disc center node 32 is provided with an extension section, and the extension section extends towards the edge direction of the microstrip circuit 3;

[0056] The extension section at the branch end of the single Y-shaped disc center node 32 can extend the effective length of the signal transmission path, optimize the impedance matching characteristics of the microstrip circuit 3, reduce the reflection loss of the signal in the transmission process, improve the insertion loss performance of the circulator, and ensure the efficient transmission of X-band signals. The design of the extension section can also increase the connection area between the single Y-shaped disc center node 32 and other parts of the microstrip circuit 3, enhance the structural stability, avoid the fracture or falling of the branch end due to stress concentration during long-term use, and improve the service life of the microstrip circuit 3. In addition, in the miniaturization design, the extension section can flexibly adapt to the edge size of the microstrip circuit 3, and the impedance matching optimization can be realized without the need to additionally expand the circuit area, which meets the dual requirements of circulator miniaturization and high performance.

[0057] The edge of the magnetic conducting sheet 1 is provided with a protruding block, and the protruding block corresponds to the positioning notch of the ferrite substrate 2;

[0058] The protruding block at the edge of the magnetic conducting sheet 1 matches the positioning notch of the ferrite substrate 2, which can realize mechanical positioning and locking of the two, prevent the ferrite substrate 2 from sliding on the surface of the magnetic conducting sheet 1 after assembly, ensure the stability of the magnetic field loop, and reduce the magnetic performance fluctuation caused by relative displacement. At the same time, the matching of the protruding block and the positioning notch can further improve the adhesion of the two, reduce the air gap between the layers, optimize the magnetic field transmission efficiency, reduce the magnetic loss, and thus ensure that the isolation and insertion loss performance of the circulator meet the design requirements. In addition, this structure does not need to use additional adhesives or fasteners to realize reliable positioning, simplifying the assembly process, while avoiding the influence of adhesive aging or fastener corrosion on product performance, improving the long-term reliability of the circulator.

[0059] The edge of the microstrip circuit 3 is provided with a positioning groove corresponding to the positioning boss 21 of the ferrite substrate 2;

[0060] The positioning groove at the edge of the microstrip circuit 3 matches the positioning boss 21 of the ferrite substrate 2, which can realize accurate positioning of the microstrip circuit 3 on the ferrite substrate 2, ensure that the center of the microstrip circuit 3 is completely coincident with the center of the ferrite substrate 2, avoid uneven electromagnetic field distribution caused by position deviation, reduce energy loss in the signal transmission process, and improve the electrical performance stability of the circulator. The design of the positioning groove can also enhance the connection stability of the microstrip circuit 3 and the ferrite substrate 2, prevent the microstrip circuit 3 from shifting in a vibration or impact environment, avoid changes in the signal transmission path, and further ensure the working reliability of the circulator. In addition, this positioning structure can simplify the assembly process, reduce the precision requirement of manual assembly, improve production efficiency, and at the same time ensure that the installation position of the microstrip circuit 3 of each product is consistent in batch production, reducing performance differences.

[0061] In the working process of the present scheme: first, install the ferrite substrate 2 with a positioning boss 21 on the magnetic conducting sheet 1, the chamfer at the top of the positioning boss 21 facilitates assembly and protects the components, reduces stress concentration, and the edge positioning notch matches the protruding block at the edge of the magnetic conducting sheet 1 to realize accurate positioning and mechanical locking; then, set the microstrip circuit 3 with a fan-shaped area 31, a groove 33 and a single-Y type disc center section 32 on the ferrite substrate 2, the inner wall protrusions 34 of the groove 33 optimize the electromagnetic field distribution, the extended section at the branch end of the single-Y type disc center section 32 optimizes impedance matching, and the edge positioning groove of the microstrip circuit 3 matches the positioning boss 21 to realize accurate positioning; then, place the ceramic sheet 4 with a guide protrusion 41 and the permanent magnet 5 with a guide groove 51 on the microstrip circuit 3 in turn, the guide protrusion 41 matches the guide groove 51 to realize fast and accurate positioning and improve the connection strength; through these structural designs, the circulator realizes the effects of small size, light weight, stable electrical performance, high reliability, strong environmental adaptability, etc., and meets the X-band signal transmission requirements.

[0062] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0063] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A miniaturized microstrip ferrite circulator in the X-band, characterized in that, include: A magnetic sheet (1) is provided, and a ferrite substrate (2) is mounted on the upper surface of the magnetic sheet (1). A microstrip circuit (3) is disposed on the upper surface of a ferrite substrate (2). A single Y-shaped disk center section (32) is mounted on the upper surface of the microstrip circuit (3). A fan-shaped area (31) is uniformly distributed on the surface of the single Y-shaped disk center section (32). A groove (33) is uniformly distributed on the upper surface of the microstrip circuit (3). A ceramic sheet (4) is disposed on the upper surface of a microstrip circuit (3). A permanent magnet (5) is mounted on the upper surface of the ceramic sheet (4). Positioning bosses (21) are evenly distributed on the upper surface of the ferrite substrate (2). The positioning bosses (21) and the ferrite substrate (2) are integrally formed.

2. The miniaturized microstrip ferrite circulator in the X-band according to claim 1, characterized in that: The inner wall of the groove (33) is uniformly provided with protruding ribs (34) spaced apart along the length of the groove (33). The protruding ribs (34) are integrally formed with the single Y-shaped disk center section (32), and the extension direction of the protruding ribs (34) is consistent with the extension direction of the groove (33).

3. A miniaturized microstrip ferrite circulator in the X-band according to claim 2, characterized in that: A gap is left between the end of the protrusion (34) and the end of the groove (33), and the gap is set along the length direction of the groove (33).

4. The miniaturized microstrip ferrite circulator in the X-band according to claim 1, characterized in that: The surface of the ceramic sheet (4) is uniformly provided with guide protrusions (41), and the inner wall of the permanent magnet (5) is provided with guide grooves (51) at the corresponding positions of the guide protrusions (41).

5. A miniaturized microstrip ferrite circulator in the X-band according to claim 1, characterized in that: The top of the positioning boss (21) is chamfered, and the chamfer is arranged around the outer periphery of the positioning boss (21).

6. A miniaturized microstrip ferrite circulator in the X-band according to claim 1, characterized in that: The ceramic sheet (4) has an arc-shaped notch at its edge, and the arc-shaped notch is distributed along the circumference of the ceramic sheet (4).

7. A miniaturized microstrip ferrite circulator in the X-band according to claim 1, characterized in that: The ferrite substrate (2) has a positioning notch on its edge, which is aligned with the edge of the magnetic sheet (1).

8. A miniaturized microstrip ferrite circulator in the X-band according to claim 1, characterized in that: The branch ends of the single Y-shaped disk center section (32) are provided with extension sections that extend toward the edge of the microstrip circuit (3).

9. A miniaturized microstrip ferrite circulator in the X-band according to claim 1, characterized in that: The edge of the magnetic sheet (1) is provided with a protrusion, which corresponds to the positioning notch of the ferrite substrate (2).

10. A miniaturized microstrip ferrite circulator in the X-band according to claim 1, characterized in that: The microstrip circuit (3) has a positioning groove on its edge, which corresponds to the positioning boss (21) of the ferrite substrate (2).

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