Miniaturized microstrip ferrite circulator of X wave band

Abstract

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.

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 the whole system signal transmission. 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. This 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. At the same time, the microstrip circuit of the existing circulator often relies on a large substrate surface space to realize the signal circulation function, lacking efficient utilization structure of the surface space, resulting in excessive circuit area, which is not conducive to product miniaturization. In addition, the permanent magnet, insulating component and microstrip circuit in some products 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, causing 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-mentioned purpose, the present application provides the following technical solution: an X-band miniaturized microstrip ferrite circulator, comprising: A magnetic conducting sheet, the upper surface of the magnetic conducting sheet is provided with a ferrite substrate; A microstrip circuit, provided 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; A ceramic sheet, provided 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 an integral molding manner.

[0006] Preferably, the inner wall of the groove is uniformly provided with a convex rib distributed along the length direction of the groove, the convex rib is integrally formed with the single Y-type disc center section, and the extension direction of the convex rib is consistent with the extension direction of the groove. The design of the convex ridge can optimize the electromagnetic field distribution of the groove area, avoid excessive concentration of local field strength through the structure of interval distribution, thereby reducing the energy loss in the signal transmission process and improving the insertion loss performance of the circulator. At the same time, the convex ridge is integrally formed with the center section of the single Y-shaped 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 convex ridge from falling off or shifting in long-term use. In the miniaturization scenario, this structure can improve the isolation of the circulator by adjusting the electromagnetic field without additional device volume, to meet the requirements of stability and anti-interference for X-band signal transmission.

[0007] Preferably, a gap is left between the end of the convex ridge and the end of the groove, and the gap is arranged along the length direction of the groove. The gap can act as a buffer space for thermal expansion and contraction, avoiding rigid collision between the convex ridge 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. At the same time, 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 convex ridge 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 convex ridge, but rather ensures that the convex ridge always maintains a stable structure under different working environments, further improving the environmental adaptability and service life of the circulator.

[0008] Preferably, the surface of the ceramic sheet is uniformly provided with guide ribs, and the inner wall of the permanent magnet is provided with guide grooves at corresponding positions of the guide ribs. The cooperation structure of the guide ribs and the guide grooves can realize fast and accurate positioning of the permanent magnet on the ceramic sheet, avoid the permanent magnet from shifting 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. At the same time, 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 the products in batch production. In addition, the guide ribs 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 ability of the circulator.

[0009] 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. 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 edge 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.

[0010] 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. 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 the circulator from 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, facilitating the operator to quickly distinguish the installation direction of the ceramic sheet, improving the assembly efficiency, and reducing performance failures caused by misassembly.

[0011] 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. The positioning notch at the edge of the ferrite substrate is aligned with the edge of the magnetic conducting sheet, which can realize quick and accurate positioning 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, reduce magnetic loss, and improve the magnetic performance efficiency of the circulator. At the same time, this positioning structure can improve the assembly precision between layers, 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 be used 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, and reducing product performance fluctuations.

[0012] 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. The extension section at the branch end of the single Y-shaped disk center section extends the effective length of the signal transmission path, optimizes the impedance matching characteristics of the microstrip circuit, reduces signal reflection loss during transmission, improves the insertion loss performance of the circulator, and ensures efficient transmission of X-band signals. The extension section also increases the connection area between the single Y-shaped disk center section and other parts of the microstrip circuit, enhancing structural stability and preventing breakage or detachment at the branch end due to stress concentration during long-term use, thus extending the lifespan of the microstrip circuit. Furthermore, in miniaturized designs, the extension section can flexibly adapt to the edge dimensions of the microstrip circuit, achieving impedance matching optimization without additionally increasing the circuit area, thus meeting the dual requirements of miniaturization and high performance of the circulator.

[0013] Preferably, the edge of the magnetic conductive sheet is provided with a protrusion, which corresponds to the positioning notch of the ferrite substrate; The protrusions on the edge of the magnetic conductive sheet engage with the positioning notches on the ferrite substrate, achieving mechanical positioning and locking between the two. This prevents the ferrite substrate from sliding on the surface of the magnetic conductive sheet after assembly, ensuring the stability of the magnetic field circuit and reducing magnetic performance fluctuations caused by relative displacement. Simultaneously, the engagement of the protrusions and positioning notches further enhances the fit between the two, reducing interlayer air gaps, optimizing magnetic field conduction efficiency, and lowering magnetic losses. This ensures that the circulator's isolation and insertion loss performance meet design requirements. Furthermore, this structure achieves reliable positioning without the need for additional adhesives or fasteners, simplifying the assembly process and avoiding the impact of adhesive aging or fastener corrosion on product performance, thus improving the long-term reliability of the circulator.

[0014] Preferably, the edge of the microstrip circuit is provided with a positioning groove, which corresponds to the positioning boss of the ferrite substrate; The positioning grooves on the edge of the microstrip circuit cooperate with the positioning bosses on the ferrite substrate to achieve precise positioning of the microstrip circuit on the ferrite substrate. This ensures that the center of the microstrip circuit and the center of the ferrite substrate are completely aligned, preventing uneven electromagnetic field distribution due to positional deviations, reducing energy loss during signal transmission, and improving the electrical performance stability of the circulator. The positioning groove design also enhances the connection stability between the microstrip circuit and the ferrite substrate, preventing microstrip circuit displacement under vibration or shock conditions, avoiding changes in the signal transmission path, and further ensuring the operational reliability of the circulator. In addition, this positioning structure simplifies the assembly process, reduces the precision requirements of manual assembly, improves production efficiency, and ensures that the microstrip circuit installation position is consistent for each product in mass production, reducing performance differences.

[0015] Compared with the prior art, the present invention provides a miniaturized microstrip ferrite circulator in the X-band, which has the following advantages: This miniaturized microstrip ferrite circulator for the X-band features an integrated design where the ferrite substrate and positioning boss are integrally molded. This reduces the number of components, lowers the overall weight, avoids space occupation caused by assembly gaps, and enhances product reliability. The microstrip circuit surface is uniformly distributed with fan-shaped areas and grooves, and a single Y-shaped disk center section is installed. This allows the circulator to function on a limited substrate surface, significantly reducing the circuit area and further promoting overall miniaturization. Ceramic sheets and permanent magnets are sequentially arranged on the upper surface of the microstrip circuit, with components stacked from top to bottom. This avoids excessive lateral space occupation, simplifies the overall structure, reduces material usage, lowers production costs, and further reduces weight. This effectively reduces the overall system size and weight burden, ensuring stable system operation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an exploded perspective view of the present invention; Figure 3 This is a schematic diagram of the microstrip circuit of the present invention; Figure 4 This is a schematic diagram of the structure of the ceramic sheet of the present invention; Figure 5 This is a schematic diagram of the structure of the permanent magnet of the present invention.

[0017] In the figure: 1. Magnetic sheet; 2. Ferrite substrate; 21. Positioning boss; 3. Microstrip circuit; 31. Sector area; 32. Single Y-shaped disk center section; 33. Groove; 34. Raised edge; 4. Ceramic sheet; 41. Guide ridge; 5. Permanent magnet; 51. Guide groove. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] This invention provides a technical solution: a miniaturized microstrip ferrite circulator in the X-band. Please refer to [link / reference]. Figure 1 It includes a magnetic conductive sheet 1, and a ferrite substrate 2 is mounted on the upper surface of the magnetic conductive sheet 1; Please see Figure 3 The microstrip circuit 3 is disposed on the upper surface of the 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 evenly distributed on the surface of the single Y-shaped disk center section 32. A groove 33 is evenly distributed on the upper surface of the microstrip circuit 3. Please see Figure 2 A ceramic sheet 4 is disposed on the upper surface of the 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.

[0020] To meet the requirements of port location, electrical performance within the operating frequency band, and miniaturization, a single Y-shaped disk center section 32 with chamfered tips at the tips of each 120-degree sector 31 is designed and located on the ferrite substrate 2. A groove 33 is designed on the disk section, and a matching stub is connected to the outside of the single Y-shaped disk center section 32 to match the resonant frequency of the ferrite. A matching microstrip circuit 3 with a 3-stage matching arc structure is set outside the center section to reduce the product size. Cylindrical permanent magnets 5 and ceramic sheets 4 of appropriate diameter and thickness are selected to place the ferrite substrate 2 under a suitable bias magnetic field H0. Through adjustments based on actual samples, the product achieves good electrical performance.

[0021] To achieve high electrical performance across the entire X-band within a compact size, a single ferrite structure was adopted, taking into account both time and economic costs. Based on requirements and simulation results from simulation software, the types of materials, overall circulator dimensions, central section structural dimensions, port and magnet locations, and the location and size of the matching circuit outside the central section were preliminarily determined.

[0022] To achieve high performance in a small size, the saturation magnetization was chosen after comprehensively considering the magnetic saturation intensity, linewidth, spin characteristics, and resonant frequency of the ferrite gyromagnetic material.

[0023] A ferrite substrate 2 is mounted on the upper surface of the magnetic conductive sheet 1. The ferrite substrate 2 adopts a one-piece molded positioning boss 21. The one-piece molded structure eliminates the need for additional positioning components, which reduces the number of components to lower the overall weight, avoids space occupation caused by assembly gaps, and improves the stability of the structural connection, thereby enhancing product reliability. A microstrip circuit 3 is set on the upper surface of the ferrite substrate 2. Its surface is evenly distributed with fan-shaped areas 31 and grooves 33, and a single Y-shaped disk center section 32 is installed. This compact circuit layout design can realize the circulator function on the limited substrate surface, greatly reducing the size of the substrate. This reduces the area occupied by the circuit and further promotes the miniaturization of the overall size. The ceramic sheet 4 and permanent magnet 5 are arranged sequentially on the upper surface of the microstrip circuit 3. The components are installed in a stacked manner from top to bottom, which avoids excessive occupation of horizontal space, simplifies the overall structure, reduces the amount of materials used, and further reduces weight while reducing production costs. With its small size and light weight, this circulator can effectively reduce the overall size and weight burden of the system when applied to systems such as space research, broadcast satellites, fixed communication service satellites, and Earth exploration satellites. Its high reliability characteristics can ensure the stable operation of the system.

[0024] Please see Figure 3 The inner wall of the groove 33 is evenly provided with protruding ribs 34 that are 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. The design of the protruding ridge 34 optimizes the electromagnetic field distribution in the groove 33 region. The spaced distribution structure avoids excessive concentration of local field strength, thereby reducing energy loss during signal transmission and improving the insertion loss performance of the circulator. Simultaneously, the protruding ridge 34 is integrally formed with the single Y-shaped disk center section 32, reducing connection gaps between components, minimizing the impact of contact resistance on electrical performance, and enhancing the overall structural stability, preventing the protruding ridge 34 from detaching or shifting during long-term use. In miniaturized applications, this structure can improve the circulator's isolation through electromagnetic field adjustment without increasing the device size, meeting the stability and anti-interference requirements of X-band signal transmission.

[0025] A gap is left between the end of the protruding ridge 34 and the end of the groove 33, and the gap is set along the length direction of the groove 33; The gap acts as a buffer for thermal expansion and contraction, preventing the protrusion 34 from rigidly colliding with the end of the groove 33 due to thermal expansion when the circulator changes temperature. This prevents cracks or deformation of the microstrip circuit 3, which could affect the integrity of the signal transmission path. Simultaneously, the gap can accommodate minute impurities or excess solder that may be generated during assembly, preventing impurity accumulation that could lead to poor contact between the protrusion 34 and the groove 33, thus avoiding short circuits or signal leakage. Furthermore, the presence of the gap does not affect the electromagnetic field regulation function of the protrusion 34; on the contrary, through reasonable space provision, it ensures that the protrusion 34 maintains a stable structural shape under different operating environments, further improving the environmental adaptability and service life of the circulator.

[0026] Please see Figure 4 The surface of the ceramic sheet 4 is uniformly provided with guide ridges 41. Please refer to [link / reference]. Figure 5 The inner wall of the permanent magnet 5 is provided with guide grooves 51 at the corresponding positions of the guide protrusions 41; The cooperative structure of the guide protrusion 41 and the guide groove 51 enables rapid and precise positioning of the permanent magnet 5 on the ceramic plate 4, preventing the permanent magnet 5 from shifting during assembly. This ensures that the magnetic field generated by the permanent magnet 5 uniformly covers the ferrite substrate 2, thereby guaranteeing the stability of the circulator's permeability and reducing the problem of decreased isolation caused by uneven magnetic field distribution. Simultaneously, this guiding structure improves assembly consistency, keeping the installation position deviation of the permanent magnet 5 in each circulator within a minimal range, ensuring the performance uniformity of mass-produced products. Furthermore, the guide protrusion 41 enhances the connection strength between the permanent magnet 5 and the ceramic plate 4, preventing displacement of the permanent magnet 5 under vibration or impact conditions, further improving the structural reliability and resistance to mechanical interference of the circulator.

[0027] The top of the positioning boss 21 is chamfered, and the chamfer surrounds the outer periphery of the positioning boss 21; The chamfered design at the top of the positioning boss 21 serves as a guide during assembly, facilitating the quick fitting of the microstrip circuit 3 or ceramic plate 4 onto the positioning boss 21. This prevents the sharp edges of the positioning boss 21 from scratching the surface of the microstrip circuit 3 or the inner wall of the ceramic plate 4, protecting the structural integrity of critical components. Simultaneously, the chamfer reduces stress concentration at the top of the positioning boss 21, preventing breakage due to stress concentration during long-term use and improving the structural strength of the ferrite substrate 2. Furthermore, the chamfer does not affect the positioning accuracy of the positioning boss 21; on the contrary, the smooth transition surface allows for a tighter fit between the microstrip circuit 3 and the ferrite substrate 2, reducing interference from interlayer air gaps on the electromagnetic field and optimizing the electrical performance stability of the circulator.

[0028] 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; The arc-shaped notch at the edge of the ceramic plate 4 enables a lightweight design without compromising its support strength and insulation performance, meeting the overall miniaturization requirements of the circulator and reducing the overall product weight. Simultaneously, the arc-shaped notch increases the heat dissipation area of ​​the ceramic plate 4, helping to dissipate the heat generated by the permanent magnet 5 during operation and the heat loss from the microstrip circuit 3, preventing excessive temperature from affecting the magnetic properties of the ferrite substrate 2, preventing temperature drift in the circulator, and ensuring the stability of signal transmission under different temperature environments. Furthermore, the arc-shaped notch also serves as a directional marker during assembly, allowing operators to quickly distinguish the installation direction of the ceramic plate 4, improving assembly efficiency and reducing performance failures caused by incorrect installation.

[0029] The edge of the ferrite substrate 2 is provided with a positioning notch, which is aligned with the edge of the magnetic sheet 1; The positioning notch on the edge of the ferrite substrate 2 aligns with the edge of the magnetic sheet 1, enabling rapid and precise alignment. This ensures that the central axes of the ferrite substrate 2 and the magnetic sheet 1 are completely coincident, preventing deviations in the magnetic field circuit due to positional misalignment, reducing magnetic losses, and improving the magnetic efficiency of the circulator. Simultaneously, this positioning structure improves interlayer assembly accuracy, reduces the gap between the ferrite substrate 2 and the magnetic sheet 1, optimizes the magnetic field conduction path, further reduces magnetic losses, and ensures stable isolation and insertion loss performance of the circulator. Furthermore, the positioning notch serves as a reference mark during the production process, facilitating identification and positioning by automated assembly equipment, improving production efficiency, and ensuring assembly consistency in mass-produced products, reducing product performance fluctuations.

[0030] The branch ends of the single Y-shaped disk center section 32 are provided with extension sections, which extend toward the edge of the microstrip circuit 3; The extension section at the branch end of the single Y-shaped disk center section 32 extends the effective length of the signal transmission path, while optimizing the impedance matching characteristics of the microstrip circuit 3, reducing signal reflection loss during transmission, improving the insertion loss performance of the circulator, and ensuring efficient transmission of X-band signals. The extension section also increases the connection area between the single Y-shaped disk center section 32 and other parts of the microstrip circuit 3, enhancing structural stability and preventing breakage or detachment at the branch end due to stress concentration during long-term use, thus extending the lifespan of the microstrip circuit 3. Furthermore, in miniaturization design, the extension section can flexibly adapt to the edge dimensions of the microstrip circuit 3, achieving impedance matching optimization without additional circuit area expansion, meeting the dual requirements of miniaturization and high performance of the circulator.

[0031] The edge of the magnetic conductive sheet 1 is provided with protrusions, which correspond to the positioning notches of the ferrite substrate 2; The protrusions on the edge of the magnetic conductor 1 engage with the positioning notches on the ferrite substrate 2, achieving mechanical positioning and locking between the two. This prevents the ferrite substrate 2 from sliding on the surface of the magnetic conductor 1 after assembly, ensuring the stability of the magnetic field circuit and reducing magnetic performance fluctuations caused by relative displacement. Simultaneously, the engagement of the protrusions and positioning notches further enhances the fit between the two, reducing interlayer air gaps, optimizing magnetic field conduction efficiency, and lowering magnetic losses. This ensures that the isolation and insertion loss performance of the circulator meets design requirements. Furthermore, this structure achieves reliable positioning without the need for additional adhesives or fasteners, simplifying the assembly process and avoiding the impact of adhesive aging or fastener corrosion on product performance, thus improving the long-term reliability of the circulator.

[0032] The edge of the microstrip circuit 3 is provided with a positioning groove, which corresponds to the positioning boss 21 of the ferrite substrate 2; The positioning groove on the edge of the microstrip circuit 3 cooperates with the positioning boss 21 on the ferrite substrate 2, enabling precise positioning of the microstrip circuit 3 on the ferrite substrate 2. This ensures that the center of the microstrip circuit 3 completely coincides with the center of the ferrite substrate 2, avoiding uneven electromagnetic field distribution due to positional deviation, reducing energy loss during signal transmission, and improving the electrical performance stability of the circulator. The positioning groove design also enhances the connection stability between the microstrip circuit 3 and the ferrite substrate 2, preventing displacement of the microstrip circuit 3 under vibration or shock conditions, avoiding changes in the signal transmission path, and further ensuring the operational reliability of the circulator. In addition, this positioning structure simplifies the assembly process, reduces the precision requirements of manual assembly, improves production efficiency, and ensures that the installation position of the microstrip circuit 3 is consistent for each product in mass production, reducing performance differences.

[0033] In operation, this solution works as follows: First, a ferrite substrate 2 with a positioning boss 21 is installed on the magnetic conductive sheet 1. The top of the positioning boss 21 is chamfered to facilitate assembly, protect components, and reduce stress concentration. The edge positioning notch cooperates with the edge protrusion of the magnetic conductive sheet 1 to achieve precise alignment and mechanical locking. Next, a microstrip circuit 3 with a fan-shaped area 31, a groove 33, and a single Y-shaped disk center section 32 is set on the ferrite substrate 2. The inner wall protrusion 34 of the groove 33 optimizes the electromagnetic field distribution, and the branch end extension of the single Y-shaped disk center section 32 optimizes impedance matching. The edge positioning groove of the microstrip circuit 3 cooperates with the positioning boss 21 to achieve precise positioning. Then, a ceramic sheet 4 with a guide protrusion 41 and a permanent magnet 5 with a guide groove 51 on the inner wall are placed sequentially on the microstrip circuit 3. The guide protrusion 41 and the guide groove 51 cooperate to achieve rapid and precise positioning and improve connection strength. Through these structural designs, the circulator achieves small size, light weight, stable electrical performance, high reliability, and strong environmental adaptability, meeting the requirements of X-band signal transmission.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, 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 with a ferrite substrate (2) mounted on its upper surface. 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. The 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. The 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 conductive 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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