Circular Filter Component

Abstract

The present application discloses a circulator filter component, which relates to the field of wireless communication. The circulator filter component includes a dielectric filter; a dielectric waveguide circulator, the dielectric waveguide circulator is provided with at least 3 ends, one end of the dielectric filter is connected to one of the ends, and a cascaded matching window is provided at the connection between the dielectric filter and the end, and the cascaded matching window is used to adjust the impedance of the circulator filter component; the dielectric waveguide circulator and the dielectric filter are integrally formed. By integrally forming the dielectric waveguide circulator and the dielectric filter, the connectors between the dielectric waveguide circulator and the dielectric filter can be reduced; at the same time, a cascaded matching window is added for impedance adjustment to obtain the same standing wave index as that of the traditional connection method using connectors. Compared with the traditional connection method through connectors, the present application can reduce insertion loss and has lower power consumption.

Description

Technical Field

[0001] This application relates to the field of wireless communication, and particularly to a circulator filter component. Background Art

[0002] With the booming construction of global 5G base stations, the applications of Massive MIMO (multiple antenna arrays) and dielectric waveguide filters in 5G base stations have been gradually popularized, and AAU (Active Antenna Unit, that is, a device integrating a remote radio unit and an antenna) is a remarkable feature of the 5G era. Under this minimalist rooftop system architecture, the common layout form of the radio frequency front-end is that the antenna array and the filter array are arranged in sequence. Then each dielectric waveguide filter is connected to one port of the circulator through a connector, and the other two ports of the circulator are connected to the transmitter and the receiver, and the circulator is surface-mounted on the board of the TR (radio frequency) component (as Figure 1 shown).

[0003] However, in this architecture, for the circulator filter component formed by interconnecting the dielectric waveguide filter and the circulator with connectors, the loss of the connectors is increased, resulting in an increase in the insertion loss and power consumption of the circulator filter component. At the same time, the uncertainty at the connection affects the performance of the circulator filter component to a certain extent. Summary of the Invention

[0004] This application aims to at least solve one of the technical problems existing in the prior art. For this purpose, a circulator filter component is proposed, which can reduce the insertion loss of the circulator filter component and reduce the power consumption.

[0005] A circulator filter component according to an embodiment of this application is characterized by including:

[0006] A dielectric filter;

[0007] A dielectric waveguide circulator, the dielectric waveguide circulator is provided with at least 3 ends, one end of the dielectric filter is connected to one of the ends, and a cascaded matching window is provided at the connection between the dielectric filter and the end, and the cascaded matching window is used to adjust the impedance of the circulator filter component; the dielectric waveguide circulator and the dielectric filter are integrally formed.

[0008] According to the above embodiments of the present application, the present application has at least the following beneficial effects: By integrally forming the dielectric waveguide circulator and the dielectric filter, the connectors between the dielectric waveguide circulator and the dielectric filter can be reduced; however, for the circulator filter assembly obtained by integrating the dielectric filter and the dielectric waveguide circulator, the standing wave index of the circulator filter assembly does not meet the requirements. Therefore, a cascaded matching window is added for impedance adjustment to meet the required standing wave index. At this time, compared with the filter assembly obtained by connecting the circulator and the dielectric filter through a connector in the conventional art, the circulator filter assembly of the present application has a smaller insertion loss and lower power consumption.

[0009] For the circulator filter assembly according to some embodiments of the present application, the other two end portions of the dielectric waveguide circulator are respectively provided with first feeding blind holes, and the dielectric filter is provided with second feeding blind holes; the two first feeding blind holes and the second feeding blind holes are respectively located on the same surface or different surfaces of the circulator filter assembly. Therefore, through different setting methods of the first feeding blind holes and the second feeding blind holes, the circulator filter assembly can be applied to the scenario where one side is connected to the antenna and the other side is connected to the TR assembly, and can also be applied to the scenario where the entire circulator filter assembly is directly welded to the TR assembly board (i.e., the AAU scenario).

[0010] For the circulator filter assembly according to some embodiments of the present application, the dielectric filter includes two first resonant cavities, two second resonant cavities, a first T-shaped through slot, and a first coupling hole. The two first resonant cavities and the two second resonant cavities are respectively located at both ends of the dielectric filter, and the two second resonant cavities are located at the end far from the cascaded matching window; the first T-shaped through slot includes a first through slot and a second through slot, and the second through slot separates the two first resonant cavities; the first through slot separates the first resonant cavity and the second resonant cavity; one end of the second through slot is connected to the first through slot; the first coupling hole is located between the two second resonant cavities, and tuning blind holes are provided on the same first surface of each of the first resonant cavity and the second resonant cavity; the circulator filter assembly is provided with a second surface relative to the first surface, and the second feeding blind hole is located on the second surface. By dividing the dielectric filter into several first resonant cavities and second resonant cavities through the first T-shaped through slot and the first coupling hole to form a single-layer dielectric filter, the overall thickness of the circulator filter assembly can be kept the same, which is more convenient for installation.

[0011] According to some embodiments of the present application, for the ring filter component, the dielectric filter further includes a second T-shaped through slot and two third resonant cavities; the second T-shaped through slot is located between the first T-shaped through slot and the first coupling hole; the second T-shaped through slot includes a third through slot and a fourth through slot; the third through slot is arranged parallel to the first through slot; the fourth through slot is arranged parallel to the second through slot; the fourth through slot is located between the two third resonant cavities; the third through slot is located between the third resonant cavity and the second resonant cavity.

[0012] According to some embodiments of the present application, for the ring filter component, second coupling holes are provided at both ends of the third through slot of the second T-shaped through slot.

[0013] According to some embodiments of the present application, for the ring filter component, electrode metal layers are provided on the outer edges of the first feed blind hole and the second feed blind hole; the electrode metal layer is connected to the metallized area of the corresponding first feed blind hole or the second feed blind hole. By connecting the electrode metal layer to the metallized area of the feed blind hole, when the pad on the PCB board is connected through the electrode metal layer, the risk of contact between the metallized area of the dielectric filter or the dielectric waveguide circulator and the pad is reduced, and at the same time, the pad can be conducted to the feed blind hole through the electrode.

[0014] According to some embodiments of the present application, for the ring filter component, the width of the electrode metal layer is set to be 0.3 mm to 1 mm. Therefore, by setting the width of the electrode metal layer to be 0.3 mm to 1 mm, the pad sizes of most existing PCB boards can be adapted.

[0015] According to some embodiments of the present application, for the ring filter component, the dielectric waveguide circulator is provided with a matching step and a mounting blind hole, the matching step is arranged on the surface of the dielectric waveguide circulator, and the matching step is provided with a plurality of grooves corresponding to the end of the dielectric waveguide circulator; the grooves are arranged circumferentially around the mounting blind hole; the mounting blind hole is used for mounting a magnetic component.

[0016] According to some embodiments of the present application, for the ring filter component, two adjacent grooves are communicated with each other. By communicating the grooves with each other, during processing, the matching step matching the outer contour of the dielectric waveguide circulator can be processed first, and then the mounting blind hole can be processed in the matching step, thereby improving the convenience of manufacturing the ring filter component.

[0017] According to some embodiments of the present application, the circulator filter component further includes a magnetic component, which includes a ferrite substrate, a samarium cobalt magnet, and a cover plate arranged in sequence; the cover plate is opposite to the ferrite substrate and away from the bottom of the mounting blind hole; the cover plate is detachably arranged on the mounting blind hole. The samarium cobalt magnet of the magnetic component can provide an external magnetic field, and the cover plate can provide a certain pressing force to the ferrite substrate and the samarium cobalt magnet, so that the magnetic component is better fixed in the mounting blind hole.

[0018] According to some embodiments of the present application, the dielectric waveguide circulator and the dielectric filter are integrally formed by a dry pressing process or an injection process and then metallized.

[0019] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0021] Figure 1 Schematic diagram of the connection of the circulator filter component in the prior art;

[0022] Figure 2 Schematic diagram of the structure of an embodiment of the circulator filter component according to an embodiment of the present application (excluding the magnetic component, the first feeding blind hole and the second feeding blind hole are arranged on the same plane);

[0023] Figure 3 Top view of the lower surface of an embodiment of the circulator filter component according to an embodiment of the present application;

[0024] Figure 4 Schematic diagram of the structure of an embodiment of the circulator filter component according to an embodiment of the present application (the magnetic component is an explosion diagram);

[0025] Figure 5 Schematic diagram of the structure of another embodiment of the circulator filter component according to an embodiment of the present application (the first feeding blind hole and the second feeding blind hole are not on the same plane).

[0026] Reference numerals:

[0027] Dielectric filter 100, second feeding blind hole 110, first T-shaped through slot 120, first through slot 121, second through slot 122, first coupling hole 130, tuning blind hole 140, second T-shaped through slot 150, third through slot 151, fourth through slot 152, second coupling hole 160, first tuning blind hole 170

[0028] Dielectric waveguide circulator 200, end 210, first feeding blind hole 220, electrode metal layer 230, non-metallized area 240, matching step 250, mounting blind hole 260,

[0029] Cascaded matching window 300,

[0030] Magnetic component 400, ferrite substrate 410, samarium cobalt magnet 420, cover plate 430;

[0031] Antenna 510, circulator 520. Detailed implementation manner

[0032] Embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0033] In the description of the present application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0034] In the description of the present application, unless otherwise clearly defined, words such as setting, installation, connection, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present application in combination with the specific content of the technical solution.

[0035] With the booming construction of global 5G base stations, the applications of Massive MIMO and dielectric waveguide filters in 5G base stations are gradually popularized, and AAU is even a remarkable feature of the 5G era. In such a minimalist rooftop system architecture, as Figure 1 shown, the general layout form of the radio frequency front end is that an antenna 510 array is arranged behind a filter array, and then each dielectric waveguide filter 100 is connected to one port of a circulator 520 through a connector. The other two ports of the circulator 520 are respectively connected to a transmitter and a receiver, and the circulator 520 is attached to the board of the TR component.

[0036] In this architecture, since the dielectric waveguide filter 100 and the circulator 520 are interconnected by connectors, it will increase the loss of the connectors, resulting in an increase in the overall insertion loss and device power consumption of the whole machine. At the same time, the connectors will also have an uncertain impact on the performance of the circulator filter component formed by the dielectric waveguide filter and the circulator 520.

[0037] Therefore, to solve the above problems, the present application proposes a circular filtering component, aiming to integrally form a dielectric filter 100 and a dielectric waveguide circulator 200, so that the circular filtering component does not contain the insertion loss of connectors, thereby reducing the overall loss of wireless devices and optimizing the layout of wireless systems.

[0038] As Figure 2 shown, the circular filtering component of the present application includes:

[0039] A dielectric filter 100;

[0040] A dielectric waveguide circulator 200, the dielectric waveguide circulator 200 is provided with at least 3 ends 210, one end of the dielectric filter 100 is connected to one of the ends 210, and a cascade matching window 300 is provided at the connection between the dielectric filter 100 and the end 210. The cascade matching window 300 is used to adjust the impedance of the circular filtering component; the dielectric waveguide circulator 200 and the dielectric filter 100 are integrally formed.

[0041] Therefore, by integrally forming the dielectric waveguide circulator 200 and the dielectric filter 100, the connectors between the dielectric waveguide circulator 200 and the dielectric filter 100 can be reduced. However, for the circular filtering component obtained by integrating the dielectric filter 100 and the dielectric waveguide circulator 200, the standing wave index of the circular filtering component may not meet the requirements. Therefore, a cascade matching window 300 is added for impedance adjustment to obtain a standing wave index that meets the requirements. At this time, compared with the traditional method of connecting the dielectric waveguide circulator 200 and the circulator through a connector, while meeting the performance of the circular filtering component, the present application has a smaller insertion loss and lower power consumption for the circular filtering component.

[0042] It should be noted that the dielectric filter 100 and the dielectric waveguide circulator 200 are obtained by integrally forming a dielectric material (such as ceramic powder) and then metallizing. It should be noted that since the dielectric waveguide circulator 200 and the dielectric filter 100 are integrally formed, there is no need for devices such as connectors to connect the dielectric waveguide circulator 200 and the dielectric filter 100, which can further reduce the cost of the circular filtering component.

[0043] It should be noted that the cascade matching window 300 is a groove, and the impedance can be adjusted by adjusting the depth and width of the groove.

[0044] It should be noted that during the simulation design, the waveguide circulator 200 and the dielectric filter 100 can be separately simulated first, and then one port of each of the two devices can be integrated and cascaded for simulation. At the same time, by adjusting the cascade matching window 300, the impedance change of the integrated circular filtering component can be improved to improve the standing wave index of the circular filtering component, so as to obtain a circular filtering component that meets the requirements.

[0045] At this time, it can be understood that the dielectric waveguide circulator 200 and the dielectric filter 100 are integrally formed by dry pressing or injection molding and then metallized.

[0046] It can be understood that, as Figure 2 , Figure 3 , Figure 5 shown, the other two ends 210 of the dielectric waveguide circulator 200 are respectively provided with first feeding blind holes 220, and the dielectric filter 100 is provided with a second feeding blind hole 110; the two first feeding blind holes 220 and the second feeding blind hole 110 are respectively located on the same surface of the circulator filtering component (such as Figure 2 , Figure 3 ) or different surfaces (such as Figure 5 shown, respectively located on the upper and lower surfaces of the circulator filtering component). Therefore, through different setting methods of the first feeding blind hole 220 and the second feeding blind hole 110, the circulator filtering component can be applied to the scenario where one side is connected to the antenna 510 and the other side is connected to the TR component, and can also be applied to the scenario where the entire circulator filtering component is directly welded to the TR component board (i.e., the AAU scenario).

[0047] It should be noted that, as Figure 2 , Figure 3 shown, when both the first feeding blind hole 220 and the second feeding blind hole 110 are provided on the same lower surface, in the AAU scenario, the thickness of the assembled entire AAU can be reduced by the thickness of an interconnection mechanism.

[0048] It can be understood that, as Figure 2 shown, the dielectric filter 100 includes two first resonant cavities, two second resonant cavities, a first T-shaped through slot 120 and a first coupling hole 130. The two first resonant cavities and the two second resonant cavities are respectively located at both ends of the dielectric filter 100, and the two second resonant cavities are located at one end far from the cascaded matching window 300; the first T-shaped through slot 120 includes a first through slot 121 and a second through slot 122, and the second through slot 122 separates the two first resonant cavities; the first through slot 121 separates the first resonant cavity and the second resonant cavity; one end of the second through slot 122 is connected to the first through slot 121; the first coupling hole 130 is located between the two second resonant cavities, and tuning blind holes 140 are provided on the same first surface of each first resonant cavity and second resonant cavity (i.e., the upper surface of the circulator filtering component as Figure 2 shown); the circulator filtering component is provided with a second surface relative to the first surface (i.e., as Figure 2The lower surface of the circular filtering component shown), and the second feeding blind hole 110 is located on the second surface. The dielectric filter 100 is divided into several first resonant cavities and second resonant cavities through the first T-shaped through slot 120 and the first coupling hole 130, so that the formed single-layer dielectric filter 100 can make the circular filtering component maintain the same overall thickness, which is more convenient for installation.

[0049] It should be noted that when the dielectric filter has only two second resonant cavities and two first resonant cavities, the second feeding blind hole 110 is located on the lower surface of the second resonant cavity (that is, the second feeding blind hole 110 and the first tuning blind hole 170 are located on the lower surface and the upper surface of the second resonant cavity respectively). When the dielectric filter 100 is provided with other resonant cavities, the second feeding blind hole 110 is located on the lower surface of the other resonant cavity adjacent to the first resonant cavity on the lower surface of the circular filtering component.

[0050] It should be noted that all the tuning blind holes 140 are located on the same surface of the dielectric filter 100. Therefore, the dielectric filter 100 in this application is a single-layer dielectric filter 100.

[0051] It should be noted that the size of the first through slot 121 and the distance between the two ends of the first through slot 121 and the connection of the second through slot 122 can be adjusted according to the simulation results of the dielectric filter 100.

[0052] It can be understood that the dielectric filter 100 further includes a second T-shaped through slot 150 and two third resonant cavities; the second T-shaped through slot 150 is located between the first T-shaped through slot 120 and the first coupling hole 130; the second T-shaped through slot 150 includes a third through slot 151 and a fourth through slot 152; the third through slot 151 is arranged parallel to the first through slot 121; the fourth through slot 152 is arranged parallel to the second through slot 122; the fourth through slot 152 is located between the two third resonant cavities; the third through slot 151 is located between the third resonant cavity and the second resonant cavity.

[0053] It should be noted that as Figure 2 shown, at this time, the second feeding blind hole 110 is located on the lower surface of the third resonant cavity.

[0054] It should be noted that multiple groups of the second T-shaped through slot 150 and the two third resonant cavities can be provided, and multiple groups of the second T-shaped through slot 150 and the two third resonant cavities are all arranged between the first T-shaped through slot 120 and the first coupling hole 130. When multiple second T-shaped through slots 150 are provided, the second feeding blind hole 110 is located on the lower surface of the third resonant cavity closest to the first T-shaped through slot 120. The third through slot 151 separates two adjacent third resonant cavities.

[0055] As Figure 2 shown, when the signal enters the second feeding blind hole 110 from the antenna, the signal direction is asFigure 2 As shown by the arrow in Figure 2 , at this time, the signal is input through the third resonant cavity where the first tuning blind hole 170 is located and sequentially passes through the second resonant cavity, another third resonant cavity, and two first resonant cavities, and then is output to the dielectric waveguide circulator 200. When the signal goes from the dielectric waveguide circulator 200 to the dielectric filter 100, at this time, the signal path is opposite to the arrow in Figure 2 and is output from the third resonant cavity where the first tuning blind hole 170 is located. Figure 2 It can be understood that second coupling holes 160 are provided at both ends of the third through slot 151 of the second T-shaped through slot 150.

[0056] It can be understood that electrode metal layers 230 are provided on the outer edges of both the first feeding blind hole 220 and the second feeding blind hole 110; and the electrode metal layer 230 is connected to the metallized area of the corresponding first feeding blind hole 220 or second feeding blind hole 110. By connecting the electrode metal layer 230 to the metallized area of the feeding blind hole, when the pad on the PCB board is connected through the electrode metal layer 230, the risk of contact between the metallized area of the dielectric filter 100 or the dielectric waveguide circulator 200 and the pad is reduced, and at the same time, the pad can be conducted to the feeding blind hole through the electrode.

[0057] It can be understood that the width of the electrode metal layer 230 is set between 0.3 mm and 1 mm. Therefore, setting the width of the electrode metal layer 230 between 0.3 mm and 1 mm can adapt to the pad sizes of most existing PCB boards.

[0058] It should be noted that 0.3 mm to 1 mm includes 0.3 mm, 1 mm, and the values between 0.3 mm and 1 mm.

[0059] It should be noted that the second feeding blind hole 110 is a cylindrical groove body with one end open. Therefore, the metallized area of the second feeding blind hole 110 can be understood as the side surface and the bottom surface of the cylindrical groove body.

[0060] It should be noted that a non-metallized area 240 is further provided on the outer edge of the electrode metal layer 230, so as to further reduce the risk of contact between the dielectric filter 100 or the dielectric waveguide circulator 200 and the PCB board.

[0061] It can be understood that the dielectric waveguide circulator 200 is provided with a matching step 250 and a mounting blind hole 260. The matching step 250 is provided on the surface of the dielectric waveguide circulator 200. The matching step 250 is provided with a plurality of grooves corresponding to the end of the dielectric waveguide circulator 200; the grooves are circumferentially arranged around the mounting blind hole 260; the mounting blind hole 260 is used for mounting the magnetic component 400.

[0062]

[0063] ​It can be understood that two adjacent grooves are interconnected. By interconnecting the grooves, during processing, a matching step 250 that matches the outer contour of the dielectric waveguide circulator 200 can be first processed, and then a mounting blind hole 260 can be processed in the matching step 250, thereby improving the convenience of manufacturing the circulator filter component.

[0064] It should be noted that the magnetic component 400 has a conductive function. Therefore, both the bottom and the side of the mounting blind hole 260 are insulated.

[0065] It should be noted that when matching steps 250 are provided on both the upper and lower surfaces of the dielectric waveguide circulator 200; compared with the scenario where matching steps 250 are provided only on one surface of the dielectric waveguide circulator 200, the depth of the matching step 250 is shallower.

[0066] It can be understood that as Figure 4 shown, the circulator filter component further includes a magnetic component 400. The magnetic component 400 includes a ferrite substrate 410, a samarium cobalt magnet 420, and a cover plate 430 arranged in sequence; the cover plate 430 is relatively far from the bottom of the mounting blind hole 260 with respect to the ferrite substrate 410; the cover plate 430 is detachably arranged on the mounting blind hole 260. The samarium cobalt magnet 420 of the magnetic component 400 can provide an external magnetic field, and the cover plate 430 can provide a certain pressing force to the ferrite substrate 410 and the samarium cobalt magnet 420, so that the magnetic component 400 is better fixed in the mounting blind hole 260.

[0067] It should be noted that when the dielectric waveguide circulator 200 is provided with one matching step 250, the thickness of the ferrite substrate 410 needs to be set thicker than when two matching steps 250 are provided. The specific thickness and the depth of the matching step 250 can be set according to the simulation results.

[0068] It should be noted that the cover plate 430 can be fixed on the mounting blind hole 260 by a clamping method. After being fixed, the cover plate 430 and the mounting blind hole 260 can be further fixed by glue or welding.

[0069] Next, refer to Figures 2 to 4 A circulator filter component according to an embodiment of the present application will be described in detail with a specific embodiment. It should be understood that the following description is only an exemplary illustration and not a specific limitation to the present application.

[0070] As Figure 2As shown, the circulator filter component of the present application includes a dielectric filter 100; a dielectric waveguide circulator 200. The dielectric waveguide circulator 200 is provided with 3 ends 210. One end of the dielectric filter 100 is connected to one of the ends 210. A cascade matching window 300 is provided at the connection between the dielectric filter 100 and the end 210. The cascade matching window is used to adjust the impedance of the circulator filter component; the dielectric waveguide circulator 200 and the dielectric filter 100 are integrally formed.

[0071] Specifically, the dielectric filter 100 and the dielectric waveguide circulator 200 are integrally formed by using a dielectric material obtained by metallizing ceramic powder through an injection process.

[0072] As Figure 2 , Figure 3 shown, the other two ends 210 of the dielectric waveguide circulator 200 are respectively provided with first feeding blind holes 220, and the dielectric filter 100 is provided with a second feeding blind hole 110; the two first feeding blind holes 220 and the second feeding blind hole 110 are respectively located on the lower surface of the circulator filter component.

[0073] Further, as Figure 2 shown, the dielectric filter 100 includes two first resonant cavities, two second resonant cavities, a first T-shaped through slot 120 and a first coupling hole 130. The two first resonant cavities and the two second resonant cavities are respectively located at both ends of the dielectric filter 100, and the two second resonant cavities are located at the end far from the cascade matching window 300; the first T-shaped through slot 120 includes a first through slot 121 and a second through slot 122. The second through slot 122 separates the two first resonant cavities; the first through slot 121 separates the first resonant cavity and the second resonant cavity; one end of the second through slot 122 is connected to the first through slot 121; the first coupling hole 130 is located between the two second resonant cavities. A tuning blind hole 140 is provided on the same upper surface of each first resonant cavity and second resonant cavity.

[0074] Further, as Figure 2 shown, the dielectric filter 100 further includes 1 second T-shaped through slot 150 and 2 third resonant cavities. The second T-shaped through slot 150 is located between the first T-shaped through slot 120 and the first coupling hole 130; the second T-shaped through slot 150 includes a third through slot 151 and a fourth through slot 152; the third through slot 151 is arranged in parallel with the first through slot 121; the fourth through slot 152 is arranged in parallel with the second through slot 122; the fourth through slot 152 is used to separate the two third resonant cavities, and the third through slot 151 separates the third resonant cavity from the second resonant cavity; the second feeding blind hole 110 is located on the lower surface of the third resonant cavity.

[0075] Specifically, when the signal is from as Figure 2When input at one end 210 of the shown dielectric waveguide circulator 200, the signal passes through two first resonant cavities, a third resonant cavity, two second resonant cavities, and the third resonant cavity provided with the second feed blind hole 110 in sequence in a direction opposite to the direction shown by the arrow in Figure 2 and then is output to form a loop. When the signal is input from the second feed blind hole 110, it is output from the dielectric filter 100 to the dielectric waveguide circulator 200 in the direction shown in Figure 2 .

[0076] Furthermore, second coupling holes 160 are provided at both ends of the third through slot 151 of the second T-shaped through slot 150.

[0077] Furthermore, electrode metal layers 230 are provided on the outer edges of both the first feed blind hole 220 and the second feed blind hole 110; the width of the electrode metal layer 230 is set at 0.3 mm, and the electrode metal layer 230 is connected to the metallized area of the corresponding first feed blind hole 220 or second feed blind hole 110.

[0078] Furthermore, a non-metallized area 240 is further provided on the outer edge of the electrode metal layer 230, thereby further reducing the risk of contact between the dielectric filter 100 or the dielectric waveguide circulator 200 and the PCB board.

[0079] Furthermore, the dielectric waveguide circulator 200 is provided with two matching steps 250 and mounting blind holes 260. The two matching steps 250 are respectively provided on the upper surface and the lower surface of the dielectric waveguide circulator 200. The matching step 250 is provided with 3 grooves corresponding to the ends of the dielectric waveguide circulator 200; the grooves are circumferentially arranged around the mounting blind hole 260; two adjacent grooves are communicated with each other to form a Y-shaped shape identical to the outer contour of the dielectric waveguide circulator 200; the mounting blind hole 260 is used for mounting the magnetic component 400.

[0080] Furthermore, as shown in Figure 4 , the circulator filter assembly further includes a magnetic component 400. The magnetic component 400 includes a ferrite substrate 410, a samarium cobalt magnet 420, and a cover plate 430 arranged in sequence; the cover plate 430 is opposite to the bottom of the ferrite substrate 410 away from the mounting blind hole 260; the cover plate 430 is detachably arranged on the mounting blind hole 260.

[0081] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0082] Although the embodiments of the present application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.

[0083] The embodiments of the present application have been described in detail above in conjunction with the accompanying drawings. However, the present application is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present application within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A circular filter component, characterized in that, Comprising: A dielectric filter; A dielectric waveguide circulator, the dielectric waveguide circulator being provided with at least 3 ends, one end of the dielectric filter being connected to one of the ends, a cascade matching window being provided at the connection between the dielectric filter and the end, the cascade matching window being used to adjust the impedance of the circulator filtering component; the dielectric waveguide circulator and the dielectric filter being integrally formed; The other two ends of the dielectric waveguide circulator are respectively provided with first feeding blind holes, and the dielectric filter is provided with second feeding blind holes; the two first feeding blind holes and the second feeding blind holes are respectively located on the same surface or different surfaces of the circulator filtering component; Wherein, when a signal enters the second feeding blind hole, the signal passes through the dielectric filter and is output to the dielectric waveguide circulator; when the signal enters from the first feeding blind hole of the dielectric waveguide circulator, it enters the dielectric filter from the cascade matching window and is output from the second feeding blind hole.

2. The circular filter component according to claim 1, characterized in that, The dielectric filter comprises two first resonant cavities, two second resonant cavities, a first T-shaped through slot and a first coupling hole. The two first resonant cavities and the two second resonant cavities are respectively located at both ends of the dielectric filter, and the two second resonant cavities are located at one end far from the cascade matching window; the first T-shaped through slot comprises a first through slot and a second through slot, and the second through slot separates the two first resonant cavities; the first through slot separates the first resonant cavity and the second resonant cavity; one end of the second through slot is connected to the first through slot; the first coupling hole is located between the two second resonant cavities, and a tuning blind hole is provided on the same first surface of each of the first resonant cavity and the second resonant cavity; the circulator filtering component is provided with a second surface relative to the first surface, and the second feeding blind hole is located on the second surface.

3. The circular filter component according to claim 2, characterized in that, The dielectric filter further comprises a second T-shaped through slot and two third resonant cavities; the second T-shaped through slot is located between the first T-shaped through slot and the first coupling hole; the second T-shaped through slot comprises a third through slot and a fourth through slot; the third through slot is arranged parallel to the first through slot; the fourth through slot is arranged parallel to the second through slot; the fourth through slot is located between the two third resonant cavities; the third through slot is located between the third resonant cavity and the second resonant cavity.

4. The circular filter component according to claim 3, characterized in that, Second coupling holes are provided at both ends of the third through slot of the second T-shaped through slot.

5. The circular filter component according to claim 4, characterized in that, Electrode metal layers are provided on the outer edges of the first feeding blind hole and the second feeding blind hole; and the electrode metal layer is connected to the metallized area of the corresponding first feeding blind hole or the second feeding blind hole.

6. The circular filter component according to claim 5, characterized in that, The width of the electrode metal layer is set between 0.3 mm and 1 mm.

7. The circular filter component according to any one of claims 1 to 6, characterized in that, The dielectric waveguide circulator is provided with a matching step and a mounting blind hole. The matching step is provided on the surface of the dielectric waveguide circulator, and the matching step is provided with a plurality of grooves corresponding to the ends of the dielectric waveguide circulator; the grooves are circumferentially arranged around the mounting blind hole; the mounting blind hole is used for mounting a magnetic component.

8. The circular filter component according to claim 7, characterized in that, Two adjacent grooves communicate with each other.

9. The circular filter component according to any one of claims 1 to 6, characterized in that, The dielectric waveguide circulator and the dielectric filter are integrally formed by a dry pressing process or an injection process and then metallized.

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