A waveguide diplexing isolation assembly

Abstract

The application provides a waveguide duplex isolation assembly, and relates to the technical field of microwave communication, to solve the technical problems of low isolation, high insertion loss and large volume of the waveguide duplex isolation assembly. The isolation assembly comprises a body, a cover plate and three waveguide flanges, the surface of the body is provided with a waveguide cavity, the cover plate is arranged on the waveguide cavity, and the three waveguide flanges are in communication with the waveguide cavity; two waveguide flanges are arranged at two ends of the body, and the other waveguide flange is arranged at the middle position of the body in a first direction; the first direction refers to the distribution direction from one end of the body to the other end; the waveguide cavity has opposite first and second side walls, the first side wall is provided with a plurality of separation portions, the separation portions extend to the second side wall and have a preset interval from the second side wall, and the plurality of separation portions separate the waveguide cavity into a plurality of resonance cavities; and the isolation assembly further comprises a plurality of adjusting members, each adjusting member is screwed on the cover plate and extends into the waveguide cavity. The isolation assembly has high isolation, low insertion loss and small volume.

Description

Technical Field

[0001] This invention relates to the field of microwave communication technology, and in particular to a waveguide duplex isolation component. Background Technology

[0002] Waveguide duplex isolation components are widely used in microwave and millimeter-wave frequency bands, such as in millimeter-wave communication systems, radar detection systems, and satellite communication systems. A waveguide duplex isolation component typically consists of two waveguide filters of different frequency bands combined through a common port, corresponding to the transmit and receive channels respectively, achieving signal frequency selection and channel isolation. However, the isolation between the transmit and receive channels of waveguide duplex isolation components is generally only 35~40dB, making it easy for high-power signals from the transmit channel to leak into the receive channel.

[0003] In related technologies, waveguide duplex isolation components rely on optimized structural schemes such as multi-cavity resonance, cross-coupling, and transmission zeros to improve out-of-band suppression, which leads to a larger size. Summary of the Invention

[0004] The purpose of this invention is to provide a waveguide duplex isolation component to solve one of the technical problems of low isolation, high insertion loss, and large size of waveguide duplex isolation components.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a waveguide duplex isolation assembly, comprising a body, a cover plate, and three waveguide flanges. A waveguide cavity is formed on the surface of the body, the cover plate covers the waveguide cavity, and the three waveguide flanges are all in communication with the waveguide cavity. Two waveguide flanges are respectively located at both ends of the body, and another waveguide flange is located at the middle position of the body in a first direction; the first direction refers to the distribution direction from one end of the body to the other end. The waveguide cavity has a first sidewall and a second sidewall opposite to each other. The first sidewall has a plurality of partitions. The partitions extend toward the second sidewall and are spaced apart from the second sidewall by a predetermined interval. The plurality of partitions divide the waveguide cavity into a plurality of resonant cavities. The isolation assembly also includes a plurality of adjustment members. Each adjustment member is screwed onto the cover plate and extends into the waveguide cavity. The isolation assembly also includes two matching structures arranged in a mirror symmetry. Each matching structure includes a Y-shaped matching platform and a gyromagnetic ferrite located at the center of the matching platform. Both matching platforms are located at the middle position of the waveguide cavity in the first direction and are respectively located on the cover plate and the bottom wall of the waveguide cavity.

[0006] According to at least one embodiment of the present invention, the isolation assembly further includes two permanent magnets, which are respectively disposed on the surface of the cover plate opposite to the waveguide cavity and on the surface of the body opposite to the waveguide cavity, and the central axis of the permanent magnets coincides with the central axis of the matching structure.

[0007] According to at least one embodiment of the present invention, a limiting ring for accommodating the permanent magnet is respectively provided on the surface of the cover plate opposite to the waveguide cavity and on the surface of the body opposite to the waveguide cavity. The isolation assembly also includes a yoke, which includes two opposing round caps and a connecting plate connecting the two round caps; the two round caps are respectively mounted on the two limiting rings.

[0008] According to at least one embodiment of the present invention, the permanent magnet is in clearance fit with the limiting ring.

[0009] According to at least one embodiment of the present invention, the surface of the adjusting member has a silver plating layer.

[0010] According to at least one embodiment of the invention, each of the adjustment elements is located at the center of the corresponding resonant cavity; and / or, Each of the adjustment elements is located between the corresponding partition and the second sidewall.

[0011] According to at least one embodiment of the present invention, the isolation assembly further includes a plurality of locking members, each of the locking members being screwed onto a corresponding adjusting member and located on the side of the cover plate opposite to the waveguide cavity.

[0012] According to at least one embodiment of the present invention, the three ends of the matching stage extend toward the three waveguide flanges respectively; The end of the matching platform has at least one step, and the height of the step decreases along the direction away from the center of the matching platform.

[0013] According to at least one embodiment of the present invention, a plurality of grooves are provided on the end faces of the first sidewall and the second sidewall facing the cover plate.

[0014] According to at least one embodiment of the present invention, the gyromagnetic ferrite is circular or triangular in shape; and / or, An adhesive layer exists between the gyromagnetic ferrite and the matching stage.

[0015] According to at least one embodiment of the present invention, the waveguide flange has a protrusion on the end face facing the cover plate, the protrusion extending toward the waveguide cavity; the protrusion is in contact with the surface of the cover plate facing the waveguide cavity; The port of the waveguide flange also has a recess, the bottom wall of which is lower than the bottom wall of the waveguide cavity, and the distance between the bottom wall of the recess and the surface of the protrusion facing away from the cover plate is the same as the height of the waveguide cavity.

[0016] According to at least one embodiment of the present invention, the height difference between the bottom wall surface of the recess and the bottom wall surface of the waveguide cavity is 0.8 mm, and the length of the recess in the first direction is 10 mm.

[0017] In one or more technical solutions provided in the exemplary embodiments of the present invention, at least one of the following beneficial effects can be achieved.

[0018] The waveguide duplex isolation assembly provided in an exemplary embodiment of the present invention includes a body, a cover plate, and three waveguide flanges. By providing multiple partitions on the first sidewall of the waveguide cavity, extending towards the second sidewall and forming a predetermined interval with the second sidewall, the waveguide cavity is divided into multiple resonant cavities arranged along a first direction. Electromagnetic resonance and multi-cavity coupling of the resonant cavities allow signals near the resonant frequency to pass through while out-of-band signals are suppressed. By providing adjustment components at corresponding locations within the resonant cavities and changing the depth of these components within the waveguide cavity, the operating frequency of the resonant cavities and the inter-cavity coupling strength are adjusted, ensuring that the filtering characteristics of each channel meet technical requirements.

[0019] Furthermore, in addition to setting an adjustment element at the center of each resonant cavity, an adjustment element is also set between each partition and the second sidewall to adjust the coupling amount between adjacent resonant cavities. This multi-point adjustment method allows for more precise control of the resonant frequency of each resonant cavity and the inter-cavity coupling strength, thereby optimizing the filtering response curve of the entire waveguide cavity and achieving steeper out-of-band rejection and lower insertion loss.

[0020] Furthermore, through the unidirectional transmission of the gyromagnetic ferrite under the combined action of an external bias magnetic field and a high-frequency electromagnetic field (high-frequency microwave signal), and the dual isolation mechanism combining the mutual suppression of the transmitting and receiving paths of the traditional duplex isolation component, the overall isolation of the transmitting and receiving channels is better than that of a single duplexer. This effectively reduces the leakage of high-power transmitted signals to the receiving end, protects the low-noise amplifier at the receiving end, and improves the sensitivity of microwave signal reception.

[0021] Furthermore, for the Y-shaped matching stage, triangular bend protrusions are formed on the first and second sidewalls of the waveguide cavity, respectively, to match the triangular recessed structure of the Y-shaped matching stage, forming an equivalent impedance transformation path and optimizing the impedance matching of signal transmission.

[0022] Furthermore, compared to the existing technology where the main body and three waveguide flanges are machined as a single unit, the cover plate is machined independently. The waveguide cavity is formed by placing the cover plate on the main body. However, the machining of the cover plate may have certain tolerances, resulting in a small gap between the end face of the cover plate and the end face of the waveguide flange. Since the top opening of the waveguide cavity extends from the center to the inner end face of the waveguide flange, electromagnetic leakage occurs. This invention addresses this by providing a protrusion at the waveguide flange port, ensuring a tight fit with the lower end surface of the cover plate, thereby effectively reducing the electromagnetic leakage path and minimizing losses. Attached Figure Description

[0023] The accompanying drawings illustrate exemplary embodiments of the invention and, together with the description thereof, serve to explain the principles of the invention. These drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification.

[0024] Figure 1 This is an isometric structural schematic diagram of an isolation component according to an embodiment of the present invention; Figure 2 This is a three-dimensional exploded structural diagram of an isolation component according to an embodiment of the present invention; Figure 3 This is an isometric structural schematic diagram of the body of the isolation component according to an embodiment of the present invention; Figure 4 This is an isometric structural schematic diagram of the cover plate of the isolation assembly according to an embodiment of the present invention; Figure 5 This is a cross-sectional structural schematic diagram of an isolation component according to an embodiment of the present invention.

[0025] Figure label: 10. Body; 11. First sidewall; 111. Separator; 12. Second sidewall; 13. Resonant cavity; 14. Groove; 20. Cover plate; 21. Limiting ring; 22. Permanent magnet; 31. First waveguide flange; 311. Raised portion; 312. Recessed portion; 32. Second waveguide flange; 41. Round cap; 42. Connecting plate; 51. Adjusting component; 52. Locking component; 61. Matching stage; 62. Spin magnet ferrite. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0027] Example 1 Figure 1 This is an isometric structural schematic diagram of an isolation component according to an embodiment of the present invention; Figure 2This is a three-dimensional exploded structural diagram of an isolation component according to an embodiment of the present invention; Figure 3 This is an isometric structural schematic diagram of the body of the isolation component according to an embodiment of the present invention. (In conjunction with...) Figures 1-3 As shown, the waveguide duplex isolation assembly of an exemplary embodiment of the present invention includes a body 10, a cover plate 20, and three waveguide flanges. The surface of the body 10 has grooves to form a waveguide cavity. The cover plate 20 covers the waveguide cavity, and all three waveguide flanges communicate with the waveguide cavity. Two waveguide flanges are respectively located at both ends of the body 10, and the third waveguide flange is located at the middle position of the body 10 in a first direction. The first direction refers to the distribution direction from one end of the body 10 to the other end. The waveguide cavity has opposing first sidewalls 11 and second sidewalls 12. The first sidewalls 11 have multiple partitions 111, which divide the space into sections... The partition 111 extends toward the second sidewall 12 and has a preset interval with the second sidewall 12. The multiple partitions 111 divide the waveguide cavity into multiple resonant cavities 13. The isolation assembly also includes multiple adjustment members 51, each of which is screwed onto the cover plate 20 and extends into the waveguide cavity. The isolation assembly also includes two matching structures arranged in a mirror symmetry. The matching structure includes a Y-shaped matching platform 61 and a gyromagnetic ferrite 62 located at the center of the matching platform 61. Both matching platforms 61 are located at the middle position of the waveguide cavity in the first direction and are respectively located on the cover plate 20 and the bottom wall of the waveguide cavity.

[0028] The isolation assembly also includes two permanent magnets 22, which are respectively disposed on the surface of the cover plate 20 away from the waveguide cavity and the surface of the body 10 away from the waveguide cavity, and the central axis of the permanent magnets 22 coincides with the central axis of the matching structure.

[0029] In practical applications, grooves are formed on the surface of the body 10 to create a waveguide cavity. When the cover plate 20 is placed on the waveguide cavity, the waveguide cavity forms a closed microwave transmission channel. The waveguide cavity is connected to three waveguide flanges. First waveguide flanges 31 are respectively provided at both ends of the waveguide cavity in the first direction, and a second waveguide flange 32 is provided at the middle position of the waveguide cavity in the first direction. These three waveguide flanges can be connected to external waveguide devices to form a three-port network.

[0030] by Figure 1 Taking the indicated orientation as an example, the first direction is the left-right direction. The first waveguide flange 31 at the left end is the P3 port, the first waveguide flange 31 at the right end is the P2 port, and the second waveguide flange 32 in the middle is the P1 port. The signal is input through the P1 port, filtered by the waveguide cavity, and then transmitted to the P2 port. The signal at the P3 port is filtered by the waveguide cavity and then transmitted to the P1 port. The two channels do not interfere with each other, allowing the electromagnetic wave to propagate and circulate in only one direction, thereby realizing the frequency selection and channel isolation functions of the duplex isolation component.

[0031] Continue as Figure 3As shown, the main structure of the waveguide cavity extends along a first direction. In a second direction (perpendicular to the first direction), the first sidewall 11 and the second sidewall 12 of the waveguide cavity are arranged opposite to each other, forming the main channel of the waveguide cavity. A second waveguide flange 32 is connected at the middle position of the second sidewall 12. By providing multiple partitions 111 on the first sidewall 11, these partitions 111 extend towards the second sidewall 12, forming a preset interval with the second sidewall 12, thereby dividing the waveguide cavity into multiple resonant cavities 13 arranged along the first direction. The resonant cavities 13 have a uniform height, but their length, width, and position in the waveguide cavity can be set according to the operating frequency. Through electromagnetic resonance and multi-cavity coupling of the resonant cavities 13, signals near the resonant frequency can pass through, while out-of-band signals are suppressed.

[0032] It should be noted that the preset intervals between each partition 111 and the second sidewall 12 may be the same or different.

[0033] like Figure 1 and Figure 2 As shown, the isolation assembly also includes a plurality of adjustment members 51, each adjustment member 51 being screwed onto the cover plate 20 and extending into the waveguide cavity; each adjustment member 51 is located at the center of the corresponding resonant cavity 13; and / or, each adjustment member 51 is located between the corresponding partition 111 and the second sidewall 12. The isolation assembly also includes a plurality of locking members 52, each locking member 52 being screwed onto the corresponding adjustment member 51 and located on the side of the cover plate 20 opposite to the waveguide cavity.

[0034] In practical applications, the adjusting component 51 can be a screw with a slotted groove 14 for easy adjustment, and the locking component 52 can be a nut. The adjusting component 51 and the locking component 52 work together to adjust the operating frequency and inter-cavity coupling strength of the resonant cavity 13 by rotating the adjusting component 51, so that the filtering characteristics of each channel meet the technical requirements. After adjustment, the locking component 52 is used to lock and fix it to prevent loosening. Adhesive can be applied between the adjusting component 51 and the locking component 52, as well as between the locking component 52 and the cover plate 20, to reinforce them and improve the structural stability and reliability of the isolation assembly.

[0035] Specifically, each adjustment element 51 corresponds one-to-one with a resonant cavity 13, meaning that an adjustment element 51 is located at the center of each resonant cavity 13; alternatively, in addition to the adjustment element 51 located at the center of each resonant cavity 13, an adjustment element 51 is also located between each partition 111 and the second sidewall 12 to adjust the coupling amount between adjacent resonant cavities 13. This multi-point adjustment method allows for more precise control of the resonant frequency and inter-cavity coupling strength of each resonant cavity 13, thereby optimizing the filtering response curve of the entire waveguide cavity and achieving steeper out-of-band rejection and lower insertion loss.

[0036] For example, the surface of the adjustment element 51 has a silver plating layer, which can effectively reduce surface resistance, reduce the conduction loss of microwave signals on the surface of the adjustment element 51, and optimize microwave parameters.

[0037] Figure 4 This is an isometric structural schematic diagram of the cover plate of the isolation assembly according to an embodiment of the present invention. (In conjunction with...) Figure 3 and Figure 4 As shown, at the middle position of the waveguide cavity, that is, at the position connected to the second waveguide flange 32, a matching structure is provided on both the cover plate 20 and the bottom wall of the waveguide cavity, and the two matching structures are arranged in a mirror symmetrical manner. The matching structure includes a Y-shaped matching platform 61 and a gyromagnetic ferrite 62 provided on the matching platform 61. The three ends of the Y-shaped matching platform 61 extend towards the three waveguide flanges respectively. The gyromagnetic ferrite 62 coincides with the central axis of the matching platform 61. The gyromagnetic ferrite 62 can be triangular or circular. The two gyromagnetic ferrites 62 are arranged opposite each other and there is a certain gap between them.

[0038] Furthermore, permanent magnets 22 are respectively disposed on the surface of the cover plate 20 away from the waveguide cavity and on the surface of the body 10 away from the waveguide cavity. The permanent magnets 22 correspond to the positions of the corresponding matching structures, and the permanent magnets 22 are cylindrical structures. The two permanent magnets 22 are located on the outer side of the cover plate 20 and the outer side of the body 10, respectively. The two permanent magnets 22 cooperate to generate a constant bias magnetic field, so that the gyromagnetic ferrite 62 operates in the required magnetization state, thereby realizing the non-reciprocal transmission characteristics of microwave signals.

[0039] By employing a dual isolation mechanism that combines the unidirectional transmission of the gyromagnetic ferrite 62 under the combined action of an external bias magnetic field (two permanent magnets 22) and a high-frequency electromagnetic field (high-frequency microwave signal), as well as the mutual suppression of the traditional duplexer transmit and receive paths, the overall transmit and receive channel isolation is no less than 60dB, which is superior to the 40dB isolation of a single duplexer (without gyromagnetic ferrite and permanent magnets). This makes it difficult for the transmitted high-power signal to leak to the receiving end, protecting the low-noise amplifier at the receiving end and improving the microwave signal receiving sensitivity.

[0040] Since adding gyromagnetic ferrite 62 to the waveguide cavity can improve out-of-band suppression and channel isolation and reduce insertion loss, the number of resonant cavities 13 in this application can achieve the same or even better microwave performance with fewer cavities compared to traditional multi-cavity resonant structures.

[0041] In duplex applications with high isolation and similar channel frequency bands, compared to solutions that achieve high isolation through multi-level cross-coupling structures, adding a permanent magnet 22 and a gyromagnetic ferrite 62 can effectively reduce the overall structural volume, making the structure more compact and adaptable to miniaturized microwave and millimeter-wave communication, radar, satellite communication and other radio frequency systems.

[0042] Furthermore, in order to address the technical issue of different bias magnetic field requirements for different operating frequency bands, such as Figure 1 and Figure 2 As shown, limiting rings 21 for accommodating the permanent magnet 22 are respectively provided on the surface of the cover plate 20 facing away from the waveguide cavity and on the surface of the body 10 facing away from the waveguide cavity; the isolation assembly also includes a yoke, which includes two opposing round caps 41 and a connecting plate 42 connecting the two round caps 41; the two round caps 41 are respectively covered on the two limiting rings 21. The permanent magnet 22 is fitted with the limiting rings 21 with a clearance.

[0043] In practical applications, the constant magnet 22 and the limiting ring 21 are fitted with a clearance, facilitating installation and position adjustment. This allows for flexible optimization of the uniformity and intensity of the bias magnetic field by adjusting the relative position and number of the constant magnets 22, thereby meeting the magnetization requirements of different operating frequency bands. The yoke is made of magnetically conductive material, forming a closed magnetic circuit, reducing magnetic leakage, thereby enhancing the magnetization intensity of the gyromagnetic ferrite 62 in the microwave frequency band, reducing insertion loss, and improving isolation performance.

[0044] The connecting plate 42 of the yoke has a U-shaped structure, and its two ends are connected to the side walls of the two round caps 41 respectively. The two round caps 41 are respectively connected to the corresponding limiting rings 21 by bolts, covering the limiting rings 21 and fixing the adjusted permanent magnet 22 inside the limiting rings 21.

[0045] Furthermore, in order to solve the problem of impedance discontinuity matching, in some embodiments, the three ends of the matching platform 61 extend toward the three waveguide flanges respectively; the ends of the matching platform 61 have at least one step, and the height of the step decreases along the direction away from the center of the matching platform 61.

[0046] In practical applications, when all three ends of the matching station 61 have multiple steps, the matching station 61 adopts a gradually decreasing step structure, with the step height decreasing step by step from the center towards the port, forming a smooth impedance transition, effectively reducing signal reflection, reducing return loss, and improving signal transmission efficiency. It should be noted that the number of steps can be one or more, optimized according to the actual bandwidth and VSWR requirements.

[0047] It should be noted that for the Y-shaped matching stage 61, triangular bend protrusions are formed on the first sidewall 11 and the second sidewall 12 of the waveguide cavity, respectively, to match the triangular recessed structure of the Y-shaped matching stage 61, forming an equivalent impedance transformation path and further optimizing the impedance matching of signal transmission.

[0048] It should also be noted that there is an adhesive layer between the gyromagnetic ferrite 62 and the mating platform 61. In practical applications, the gyromagnetic ferrite 62 is fixed to the center of the mating platform 61 by adhesive, so that it coincides with the center of the circle or the center of the circumcircle of the mating platform 61.

[0049] Example 2 To address the electromagnetic leakage problem caused by the manufacturing tolerances of the isolation components, this embodiment further optimizes the structure of the isolation components based on Embodiment 1.

[0050] Figure 5 This is a cross-sectional structural schematic diagram of an isolation component according to an embodiment of the present invention. Figure 5 As shown, the waveguide flange has a protrusion 311 on the end face facing the cover plate 20, and the protrusion 311 extends toward the waveguide cavity; the protrusion 311 fits against the surface of the cover plate 20 facing the waveguide cavity; the port of the waveguide flange also has a recess 312, the bottom wall surface of the recess 312 is lower than the bottom wall surface of the waveguide cavity, and the distance h2 between the bottom wall surface of the recess 312 and the surface of the protrusion 311 facing away from the cover plate 20 is the same as the height h1 of the waveguide cavity, that is, the size of the waveguide cavity is the same as the port size of the waveguide flange.

[0051] It should be noted that in related technologies, the body 10 and three waveguide flanges are integrally machined, while the cover plate 20 is machined independently. The cover plate 20 is placed on the body 10, but the machining of the cover plate 20 may have certain tolerances, resulting in a small gap between the end face of the cover plate 20 and the end face of the waveguide flange. Since the top opening of the waveguide cavity extends from the center to the inner end face of the waveguide flange, electromagnetic leakage occurs. This embodiment of the invention provides a protrusion 311 on the end face of the waveguide flange, ensuring a tight fit with the lower end surface of the cover plate 20, thereby effectively reducing the electromagnetic leakage path and signal loss.

[0052] In practical applications, the protrusion 311 extends towards the center of the waveguide cavity, forming the inner end face of the waveguide flange and creating a sealing surface that fits snugly against the bottom surface of the cover plate 20. This ensures that there are no gaps between the cover plate 20 and the main body after assembly, thereby reducing the risk of electromagnetic leakage. Simultaneously, a recess 312 is provided at the waveguide flange port, with its bottom wall surface lower than the bottom wall surface of the waveguide cavity. This maintains the dimensional consistency between the waveguide flange port and the waveguide cavity, ensuring that impedance continuity is not affected.

[0053] Specifically, the height difference between the bottom wall surface of the recess 312 and the bottom wall surface of the waveguide cavity is 0.8 mm, and the length of the recess 312 in the first direction is 10 mm. That is, the distance between the end face of the protrusion 311 facing the waveguide cavity and the outer end face of the waveguide flange is 10 mm, and the height of the protrusion 311 is also 0.8 mm. Through the above structural optimization, this embodiment, while ensuring high isolation and low insertion loss performance, further improves the processing tolerance of the isolation component, reduces assembly precision requirements, and enhances the manufacturability and consistency of the isolation component.

[0054] It should be noted that in the prior art, the waveguide flange port coincides with the central axis of the waveguide cavity, while in this invention, protrusions 311 and recesses 312 are provided at all three waveguide flanges. That is, the ports of the three waveguide flanges are all recessed by 0.8 mm relative to the waveguide cavity, and a portion of the protrusion 311 is attached to the lower surface of the three ends of the cover plate 20 (the portion of the cover plate extending towards the second waveguide flange can also be considered as one end). The surface of the protrusion 311 facing away from the cover plate is flush with the wall surface of the waveguide flange port facing the recess 312.

[0055] Example 3 To address the issue of decreased structural stability of the isolation components during long-term use, this embodiment further optimizes the fixing method based on Embodiment 1 or Embodiment 2.

[0056] like Figure 3 As shown, multiple grooves 14 are provided on the end faces of the first sidewall 11 and the second sidewall 12 facing the cover plate 20. Along the first direction, multiple grooves 14 are provided on the end face of the first sidewall 11 facing the cover plate 20, and multiple grooves 14 are also provided on the end face of the second sidewall 12 facing the cover plate 20. The grooves 14 are filled with solder. The solder is heated and melted during assembly and then cooled and solidified, so that the cover plate 20 and the body 10 are connected by screws and also form a strong welded connection.

[0057] The above-mentioned dual fixing method improves the connection strength between the cover plate 20 and the body 10, effectively preventing loosening or displacement caused by factors such as vibration and temperature changes, and enhancing the long-term reliability of the isolation component in complex environments.

[0058] Meanwhile, the weld layer formed after the solder fills the groove 14 and melts at high temperature can also play an auxiliary sealing role, further blocking the electromagnetic leakage path and reducing insertion loss. At the same time, since the body 10 is made of metal, the groove 14 also has a weight reduction effect, reducing the overall weight without affecting the structural strength, which is conducive to the lightweighting of the isolation component.

[0059] Those skilled in the art should understand that the above embodiments are merely for illustrating the present invention and are not intended to limit the scope of the invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A waveguide duplex isolation component, characterized in that, The device includes a body, a cover plate, and three waveguide flanges. A waveguide cavity is formed on the surface of the body. The cover plate covers the waveguide cavity. All three waveguide flanges are in communication with the waveguide cavity. Two waveguide flanges are respectively located at both ends of the body, and another waveguide flange is located at the middle position of the body in a first direction; the first direction refers to the distribution direction from one end of the body to the other end. The waveguide cavity has opposing first and second sidewalls.

2. The isolation component according to claim 1, characterized in that, The isolation assembly also includes two permanent magnets.

3. The isolation component according to claim 2, characterized in that, The two permanent magnets are respectively disposed on the surface of the cover plate opposite to the waveguide cavity and on the surface of the body opposite to the waveguide cavity.

4. The isolation component according to claim 3, characterized in that, A limiting ring for accommodating the permanent magnet is provided on the surface of the cover plate opposite to the waveguide cavity.

5. The isolation component according to claim 4, characterized in that, A limiting ring for accommodating the constant magnet is provided on the surface of the body facing away from the waveguide cavity.

6. The isolation component according to claim 5, characterized in that, The constant magnet is fitted with the limiting ring with a clearance.

7. The isolation component according to any one of claims 1-6, characterized in that, Multiple grooves are provided on the end face of the first sidewall facing the cover plate.

8. The isolation component according to claim 7, characterized in that, Multiple grooves are provided on the end face of the second sidewall facing the cover plate.

9. The isolation component according to claim 7, characterized in that, The shape of a gyromagnetic ferrite is circular or triangular.

10. The isolation component according to claim 9, characterized in that, An adhesive layer exists between the gyromagnetic ferrite and the matching stage.

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