Dielectric body and dielectric filter

Abstract

The present application relates to the field of communications technology and provides a dielectric body and a dielectric filter. The dielectric body includes: a first dual-mode dielectric; a first single-mode dielectric; and a first cross-coupling structure. The first cross-coupling structure is connected to the first dual-mode dielectric and the first single-mode dielectric, and is used to cross-couple the first dual-mode dielectric and the first single-mode dielectric. The first dual-mode dielectric, the first single-mode dielectric, and the first cross-coupling structure are integrated. The dielectric filter using the dielectric body provided by the present application can simultaneously achieve the characteristics of small size, a second harmonic far from the passband, and a transmission zero point without increasing manufacturing difficulty.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a dielectric body and a dielectric filter having the dielectric body. Background Art

[0002] At present, it is difficult for dielectric filters to simultaneously achieve the characteristics of small size, second harmonic distance from the passband and transmission zero point without increasing the manufacturing difficulty, which affects the performance and application of the filter. Summary of the Invention

[0003] The purpose of the present application is to provide a dielectric body and a dielectric filter to improve the technical problem in related arts that dielectric filters are difficult to achieve simultaneously a small size, a second harmonic farther from the passband, and a transmission zero point without increasing the difficulty of manufacturing.

[0004] To achieve the above-mentioned objectives, one aspect of the present application provides a dielectric body, which includes: a first dual-mode medium; a first single-mode medium; and a first cross-coupling structure, wherein the first cross-coupling structure is connected to the first dual-mode medium and the first single-mode medium, and is used for cross-coupling the first dual-mode medium and the first single-mode medium; wherein the first dual-mode medium, the first single-mode medium, and the first cross-coupling structure are an integrated structure.

[0005] In one embodiment, the first cross-coupling structure includes: a first coupling medium, the first coupling medium is connected to the first dual-mode medium and the first single-mode medium, and is used for coupling the first dual-mode medium with the first single-mode medium; and a first coupling structure, the first coupling structure is provided on the first dual-mode medium or the first single-mode medium, and is used for coupling the first dual-mode medium with the first single-mode medium.

[0006] In one embodiment, the first coupling structure is a coupling slot.

[0007] In one embodiment, the first coupling structure is opened on a side of the first dual-mode medium close to the first single-mode medium; the first coupling structure is located on one side of the first coupling medium.

[0008] In one embodiment, the first dual-mode medium has a cube structure.

[0009] In one embodiment, the first single-mode medium is a rectangular parallelepiped structure.

[0010] In one embodiment, a first coupling portion is provided on the first dual-mode medium for coupling two resonant modes of the first dual-mode medium.

[0011] In one embodiment, a first hole and a second hole are provided on the first dual-mode medium, the first hole and the second hole are not located on the same side of the first dual-mode medium, the first hole is used to adjust the resonant frequency of one resonant mode of the first dual-mode medium, and the second hole is used to adjust the resonant frequency of the other resonant mode of the first dual-mode medium.

[0012] In one embodiment, a first frequency adjustment hole is opened in the first single-mode medium.

[0013] In one embodiment, a first connection end is provided on the first dual-mode medium, and a second connection end is provided on the first single-mode medium; one of the first connection end and the second connection end is an input end, and the other is an output end.

[0014] In one embodiment, the dielectric body includes: a second dual-mode medium; and a second cross-coupling structure, wherein the second cross-coupling structure is connected to the second dual-mode medium and the first single-mode medium, and is used for cross-coupling the second dual-mode medium and the first single-mode medium.

[0015] In one embodiment, the first dual-mode medium, the first single-mode medium, the first cross-coupling structure, the second dual-mode medium, and the second cross-coupling structure are an integrated structure.

[0016] In one embodiment, the second dual-mode medium has a cube structure.

[0017] In one embodiment, the second cross-coupling structure includes: a second coupling medium, the second coupling medium being connected to the second dual-mode medium and the first single-mode medium and being used for coupling the second dual-mode medium with the first single-mode medium; and a second coupling structure, the second coupling structure being provided on the second dual-mode medium or the first single-mode medium and being used for coupling the second dual-mode medium with the first single-mode medium.

[0018] In one embodiment, the second coupling structure is a coupling slot.

[0019] In one embodiment, the second coupling structure is opened on a side of the second dual-mode medium close to the first single-mode medium; the second coupling structure is located on one side of the second coupling medium.

[0020] In one embodiment, a second coupling portion is provided on the second dual-mode medium for coupling two resonant modes of the second dual-mode medium.

[0021] In one embodiment, a third hole and a fourth hole are provided on the second dual-mode medium, and the third hole and the fourth hole are not located on the same side of the second dual-mode medium. The third hole is used to adjust the resonant frequency of one resonant mode of the second dual-mode medium, and the fourth hole is used to adjust the resonant frequency of the other resonant mode of the second dual-mode medium.

[0022] In one embodiment, a first coupling portion is provided on the first dual-mode medium for coupling the two resonant modes of the first dual-mode medium; a second coupling portion is provided on the second dual-mode medium for coupling the two resonant modes of the second dual-mode medium; wherein the coupling polarity between the two resonant modes of the first dual-mode medium is opposite to the coupling polarity between the two resonant modes of the second dual-mode medium.

[0023] In one embodiment, a first connection end is provided on the first dual-mode medium, and a second connection end is provided on the second dual-mode medium; one of the first connection end and the second connection end is an input end, and the other is an output end.

[0024] In one embodiment, the dielectric body includes: a second single-mode medium; a coupling medium, the coupling medium being connected to the second single-mode medium and the first single-mode medium and being used for coupling the second single-mode medium with the first single-mode medium; a second dual-mode medium; and a second cross-coupling structure, the second cross-coupling structure being connected to the second dual-mode medium and the second single-mode medium and being used for cross-coupling the second dual-mode medium with the second single-mode medium.

[0025] In one embodiment, the first single-mode medium, the second single-mode medium, and the coupling medium are an integrated structure; and / or the second single-mode medium, the second dual-mode medium, and the second cross-coupling structure are an integrated structure.

[0026] In one embodiment, the second dual-mode medium has a cube structure.

[0027] In one embodiment, the second single-mode medium is a rectangular parallelepiped structure.

[0028] In one embodiment, the second cross-coupling structure includes: a second coupling medium, the second coupling medium being connected to the second dual-mode medium and the second single-mode medium and being used for coupling the second dual-mode medium with the second single-mode medium; and a second coupling structure, the second coupling structure being provided on the second dual-mode medium or the second single-mode medium and being used for coupling the second dual-mode medium with the second single-mode medium.

[0029] In one embodiment, the second coupling structure is a coupling slot.

[0030] In one embodiment, the second coupling structure is opened on a side of the second dual-mode medium close to the second single-mode medium; the second coupling structure is located on one side of the second coupling medium.

[0031] In one embodiment, a second coupling portion is provided on the second dual-mode medium for coupling two resonant modes of the second dual-mode medium.

[0032] In one embodiment, a third hole and a fourth hole are provided on the second dual-mode medium, and the third hole and the fourth hole are not located on the same side of the second dual-mode medium. The third hole is used to adjust the resonant frequency of one resonant mode of the second dual-mode medium, and the fourth hole is used to adjust the resonant frequency of the other resonant mode of the second dual-mode medium.

[0033] In one embodiment, a second frequency adjustment hole is opened in the second single-mode medium.

[0034] In one embodiment, a first coupling portion is provided on the first dual-mode medium for coupling the two resonant modes of the first dual-mode medium; a second coupling portion is provided on the second dual-mode medium for coupling the two resonant modes of the second dual-mode medium; wherein the coupling polarity between the two resonant modes of the first dual-mode medium is opposite to the coupling polarity between the two resonant modes of the second dual-mode medium.

[0035] In one embodiment, a first connection end is provided on the first dual-mode medium, and a second connection end is provided on the second dual-mode medium; one of the first connection end and the second connection end is an input end, and the other is an output end.

[0036] Another aspect of the present application provides a dielectric filter, comprising: a dielectric body as described in any one of the above embodiments; and a metal layer, wherein the metal layer is coated on the outer surface of the dielectric body.

[0037] One or more of the above technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0038] The dielectric body provided in the embodiment of the present application is provided with a first dual-mode medium, a first single-mode medium and a first cross-coupling structure. The first cross-coupling structure is connected to the first dual-mode medium and the first single-mode medium, and is used for cross-coupling the first dual-mode medium with the first single-mode medium. Therefore, the two resonant modes of the first dual-mode medium and the resonant mode of the first single-mode medium can be coupled with each other in pairs, which is conducive to generating a transmission zero point in the dielectric filter using the dielectric body provided in the embodiment of the present application, thereby improving the suppression performance of the dielectric filter; and the cross-coupling method of the first dual-mode medium and the first single-mode medium can not only reduce the frequency of the dielectric filter compared to the method in which each dielectric cavity corresponds to one frequency point, but also reduce the frequency of the dielectric filter. The size of the dielectric body is conducive to reducing the size of the dielectric filter using the dielectric body provided by the embodiment of the present application. Moreover, the first single-mode medium can push the harmonics away due to cross-coupling with the first dual-mode medium, thereby improving the problem of harmonics being close to the passband, which is conducive to making the second harmonic of the dielectric filter using the dielectric body provided by the embodiment of the present application farther away from the passband; at the same time, by setting the first dual-mode medium, the first single-mode medium and the first cross-coupling structure as an integrated structure, the dielectric body can be manufactured by an integrated molding method, which has low production difficulty and good consistency, and is conducive to improving the stability and reliability of the dielectric filter using the dielectric body provided by the embodiment of the present application. Therefore, the dielectric body provided by the embodiment of the present application can enable the dielectric filter using the dielectric body provided by the embodiment of the present application to simultaneously achieve a small size, a second harmonic farther away from the passband, and a transmission zero point without increasing the manufacturing difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 A schematic diagram of the structure of the dielectric body provided in an embodiment of the present application;

[0041] Figure 2 A schematic structural diagram of a dielectric body provided in another embodiment of the present application;

[0042] Figure 3 A schematic structural diagram of a dielectric body provided in yet another embodiment of the present application;

[0043] Figure 4 for Figure 3 A schematic diagram of the main structure of the medium body;

[0044] Figure 5 The dielectric filter provided in the embodiment of the present application (using Figure 3A schematic structural diagram of the dielectric body in FIG;

[0045] Figure 6 for Figure 5 Amplitude-frequency characteristic curve of the dielectric filter in .

[0046] Among them, the reference numerals in the figures are:

[0047] 100, dielectric body; 10, first dual-mode dielectric; 20, first single-mode dielectric; 30, first cross-coupling structure; 31, first coupling dielectric; 32, first coupling structure; 101, first coupling portion; 102, first hole; 103, second hole; 201, first frequency adjustment hole; 111, first connection end; 112, second connection end; 40, second dual-mode dielectric; 50, second cross-coupling structure; 51, second coupling dielectric; 52, second coupling structure; 401, second coupling portion; 402, third hole; 403, fourth hole; 60, second single-mode dielectric; 70, coupling dielectric; 601, second frequency adjustment hole;

[0048] 1000, dielectric filter; 200, metal layer. DETAILED DESCRIPTION

[0049] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0050] In the description of this application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0052] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0053] With the continuous development of wireless communication technology, the distribution of wireless communication base stations is becoming more and more dense, and the requirements for the volume, weight and coverage area of ​​base stations are becoming higher and higher. Therefore, the miniaturization and lightweighting of filters are the future application trend.

[0054] During the process of developing the technical solution of this application, the inventors discovered that current dielectric waveguide filters are typically implemented using coaxial cavities, with each cavity corresponding to a single frequency point. However, these cavities suffer from large size. However, because dielectric dual-mode waveguide filters have two resonant modes, a single dual-mode dielectric is equivalent to two single-mode dielectrics, significantly reducing the filter's size and weight. However, the second harmonic of a dielectric dual-mode waveguide filter is relatively close to the passband, an inherent property that cannot be eliminated, affecting filter performance. Furthermore, both dielectric waveguide filters and dielectric dual-mode waveguide filters struggle to achieve a transmission zero, resulting in suboptimal filter suppression performance.

[0055] To solve the above problems, the inventors have experimented with a solution of splicing and coupling two dual-mode dielectric resonators to achieve a transmission zero. However, they found that not only is the second harmonic close to the passband, but when splicing the two dual-mode dielectric resonators, corresponding coupling windows (such as through holes) need to be opened on the metal layers of the two dual-mode dielectric resonators, and the two dual-mode dielectric resonators need to be precisely connected by welding or other connection methods. The manufacturing process is relatively complex and requires extremely high precision, otherwise it will affect the performance of the final product. In addition, the need to splice the two separate dual-mode dielectric resonators to connect results in poor consistency of the final product.

[0056] Based on this, in order to improve the technical problem in related technologies that dielectric filters are difficult to achieve simultaneously having a small size, a second harmonic far from the passband, and a transmission zero point without increasing the manufacturing difficulty, the inventors proposed the following solution.

[0057] See also Figure 1 The embodiment of the present application provides a dielectric body 100 for use in a dielectric filter. The dielectric body 100 includes a first dual-mode dielectric 10, a first single-mode dielectric 20, and a first cross-coupling structure 30, wherein:

[0058] The first dual-mode medium 10 is a dual-mode medium structure having two resonant modes. The two resonant modes of the first dual-mode medium 10 can be two orthogonal resonant modes, such as two orthogonal degenerate modes, but are not limited thereto. The first dual-mode medium 10 can have a dielectric structure having two resonant modes in various shapes, such as a generally cube or rectangular parallelepiped shape. Other shapes are also possible and are not intended to be limiting.

[0059] The first single-mode medium 20 is a single-mode medium structure having one resonant mode.

[0060] The first cross-coupling structure 30 is connected to the first dual-mode medium 10 and the first single-mode medium 20, and is used to cross-couple the first dual-mode medium 10 with the first single-mode medium 20. The cross-coupling between the first dual-mode medium 10 and the first single-mode medium 20 involves pairwise coupling between the two resonant modes of the first dual-mode medium 10 and the resonant mode of the first single-mode medium 20. In other words, one resonant mode of the first dual-mode medium 10 couples with the resonant mode of the first single-mode medium 20, while the other resonant mode of the first dual-mode medium 10 couples with the resonant mode of the first single-mode medium 20. Coupling can be understood as the transfer or exchange of electromagnetic energy between resonant modes. The first cross-coupling structure 30 can be any structure that allows for cross-coupling between the first dual-mode medium 10 and the first single-mode medium 20, including, for example, a block structure, a sheet structure, a plate structure, or the like. It can also include, but is not limited to, a block structure, a sheet structure, or a plate structure and coupling slots, coupling surfaces, and the like.

[0061] The first dual-mode dielectric 10, the first single-mode dielectric 20, and the first cross-coupling structure 30 are integrally formed. Specifically, the first dual-mode dielectric 10, the first single-mode dielectric 20, and the first cross-coupling structure 30 are integrally formed. It is understood that the dielectric body 100 can be integrally formed using various existing methods for manufacturing dielectric bodies for dielectric filters. For example, dielectric material can be pressed and formed in a mold having the shape of the dielectric body 100, and then sintered to obtain the dielectric body 100, but this is not limited to this. The material of the dielectric body 100 can be any of the materials used in various existing dielectric filters, and this is not a limitation here.

[0062] The dielectric body 100 provided in the embodiment of the present application is provided with a first dual-mode dielectric 10, a first single-mode dielectric 20, and a first cross-coupling structure 30. The first cross-coupling structure 30 is connected to the first dual-mode dielectric 10 and the first single-mode dielectric 20, and is used to cross-couple the first dual-mode dielectric 10 with the first single-mode dielectric 20. Therefore, the two resonant modes of the first dual-mode dielectric 10 and the resonant modes of the first single-mode dielectric 20 can be mutually coupled in pairs, which is beneficial for generating transmission zeros in the dielectric filter using the dielectric body 100 provided in the embodiment of the present application, thereby improving the out-of-band suppression performance of the dielectric filter. Moreover, the cross-coupling method of the first dual-mode dielectric 10 and the first single-mode dielectric 20 can not only reduce the size of the dielectric body 100 compared to the method in which each dielectric cavity corresponds to one frequency point, thereby reducing the size of the dielectric filter using the dielectric body 100 provided in the embodiment of the present application, but also the first cross-coupling method can reduce the size of the dielectric filter using the dielectric body 100 provided in the embodiment of the present application. The single-mode dielectric 20 can push harmonics farther away due to cross-coupling with the first dual-mode dielectric 10, which helps to make the second harmonic of the dielectric filter using the dielectric body 100 provided in the embodiment of the present application farther away from the passband, thereby improving the performance of the dielectric filter. At the same time, by arranging the first dual-mode dielectric 10, the first single-mode dielectric 20, and the first cross-coupling structure 30 as an integrated structure, the dielectric body 100 can be manufactured by an integrated molding method, which has low manufacturing difficulty and good consistency, and helps to improve the stability and reliability of the dielectric filter using the dielectric body 100 provided in the embodiment of the present application. The inventor's original experiment with the method of splicing two dual-mode dielectric resonators requires a coupling window to be opened in the metal layer of the dual-mode dielectric resonator for coupling through the coupling window, and this method has high requirements on the shape of the coupling window. Therefore, it is difficult to manufacture the two dual-mode dielectric resonators by an integrated molding method.

[0063] As can be seen from the above, the dielectric body 100 provided in the embodiment of the present application can enable the dielectric filter using the dielectric body 100 provided in the embodiment of the present application to simultaneously achieve a smaller size, a second harmonic farther from the passband, and a transmission zero point without increasing the manufacturing difficulty, thereby effectively improving the performance of the dielectric filter.

[0064] In one embodiment, see Figure 1The first cross-coupling structure 30 includes a first coupling medium 31 and a first coupling structure 32. The first coupling medium 31 is connected to the first dual-mode medium 10 and the first single-mode medium 20, and is used to couple the first dual-mode medium 10 with the first single-mode medium 20. It is understood that the first coupling medium 31 is a dielectric structure used to couple the first dual-mode medium 10 with the first single-mode medium 20. The first coupling medium 31 can be a dielectric structure of various shapes, such as a block structure, a strip structure, or a plate structure, but is not limited to these. Since the first cross-coupling structure 30 is integral with the first dual-mode medium 10 and the first single-mode medium 20, the first coupling medium 31 is also integral with the first dual-mode medium 10 and the first single-mode medium 20. The first coupling structure 32 is disposed on the first dual-mode medium 10 or the first single-mode medium 20, and is used to couple the first dual-mode medium 10 with the first single-mode medium 20. The first coupling structure 32 can be, but is not limited to, a coupling groove, a coupling angle cut, a coupling edge cut, a coupling hole, or other structures.

[0065] In this configuration, since the first cross-coupling structure 30 includes a first coupling medium 31 connected to the first dual-mode medium 10 and the first single-mode medium 20, and includes a first coupling structure 32 disposed on the first dual-mode medium 10 or the first single-mode medium 20, one resonant mode of the first dual-mode medium 10 can be coupled to the resonant mode of the first single-mode medium 20 via the first coupling medium 31, and the other resonant mode of the first dual-mode medium 10 can be coupled to the resonant mode of the first single-mode medium 20 via the first coupling structure 32. This facilitates the coupling of the two resonant modes of the first dual-mode medium 10 with the resonant mode of the first single-mode medium 20 via a coupling channel, respectively. This can improve the cross-coupling effect and further facilitate the generation of a transmission zero on one side of the passband of the dielectric filter using the dielectric body 100 provided in the embodiment of the present application.

[0066] It can be understood that the number of the first coupling media 31 can be one or more, and the number of the first coupling structures 32 can be one or more, which can be set according to actual needs and are not limited here.

[0067] It should be noted that the structure of the first cross-coupling structure 30 is not limited thereto.

[0068] Alternatively, in some other embodiments, the first cross-coupling structure 30 may not include the first coupling structure 32. For example, the first cross-coupling structure 30 may be a first coupling medium 31, and both resonant modes of the first dual-mode medium 10 may be coupled to the resonant mode of the first single-mode medium 20 via the first coupling medium 31. That is, the two resonant modes of the first dual-mode medium 10 may be coupled to the resonant mode of the first single-mode medium 20 via the same coupling channel.

[0069] Alternatively, in some other embodiments, the first cross-coupling structure 30 may not include the first coupling medium 31. For example, the first cross-coupling structure 30 may be a first coupling structure 32, and both resonant modes of the first dual-mode medium 10 may be coupled to the resonant mode of the first single-mode medium 20 via the first coupling structure 32. In this case, the first dual-mode medium 10 and the first single-mode medium 20 may be directly connected.

[0070] Alternatively, in one embodiment, see Figure 1 , the first coupling structure 32 is a coupling groove.

[0071] With this arrangement, since the first coupling structure 32 is a coupling slot, it can be directly formed in the first dual-mode medium 10 or the first single-mode medium 20, facilitating manufacturing. Furthermore, by varying the volume of the first dual-mode medium 10 or the first single-mode medium 20 occupied by the coupling slot, the coupling strength (also referred to as the coupling amount or magnitude) between one of the resonant modes of the first dual-mode medium 10 and the resonant mode of the first single-mode medium 20 can be varied. For example, the coupling strength between one of the resonant modes of the first dual-mode medium 10 and the resonant mode of the first single-mode medium 20 can be varied by varying at least one of the length, width, and depth of the coupling slot, thereby further facilitating coupling of one of the resonant modes of the first dual-mode medium 10 with the resonant mode of the first single-mode medium 20 via the coupling slot.

[0072] It should be noted that the structure of the first coupling structure 32 is not limited to this. Optionally, in other embodiments, the first coupling structure 32 may also be a cut-corner structure, a cut-edge structure, a hole structure, etc. For example, a cut-corner structure or a cut-edge structure may be provided at a corner or edge of the first dual-mode medium 10 or the first single-mode medium 20.

[0073] In one embodiment, see Figure 1 The first coupling structure 32 is provided on the first dual-mode medium 10 on a side close to the first single-mode medium 20. The first coupling structure 32 is located on one side of the first coupling medium 31. Alternatively, the first coupling structure 32 may be adjacent to the first coupling medium 31.

[0074] With this arrangement, since the first coupling structure 32 is provided on the first dual-mode medium 10 on a side close to the first single-mode medium 20 and on a side of the first coupling medium 31, the first coupling structure 32 is closer to the first coupling medium 31. This facilitates the coupling of the two resonant modes of the first dual-mode medium 10 with the resonant mode of the first single-mode medium 20 via the first coupling structure 32 and the first coupling medium 31, respectively, thereby improving the cross-coupling effect.

[0075] Of course, the location of the first coupling structure 32 is not limited to this. Alternatively, in other embodiments, the first coupling structure 32 and the first coupling medium 31 may be at a certain distance, as long as one of the resonant modes of the first dual-mode medium 10 can be coupled to the resonant mode of the first single-mode medium 20 through the first coupling structure 32.

[0076] Optionally, the first coupling structure 32 can be disposed on a side edge of the first dual-mode medium 10 (i.e., a side edge of the first dual-mode medium 10), which further facilitates coupling between the first dual-mode medium 10 and the first single-mode medium 20. Furthermore, compared to disposing the first coupling structure 32 closer to the inside, disposing the first coupling structure 32 on a side edge of the first dual-mode medium 10 facilitates processing and molding, has a smaller impact on the structural strength of the first dual-mode medium 10, is less susceptible to damage when subjected to external forces, and has higher reliability.

[0077] In one embodiment, see Figure 1 The first dual-mode medium 10 is provided with a first coupling portion 101 for coupling the two resonant modes of the first dual-mode medium 10. It is understood that the first coupling portion 101 can be any structure capable of coupling the two resonant modes of the first dual-mode medium 10, such as, but not limited to, a coupling groove, a coupling cutout, a coupling cutout, or a coupling hole. It is understood that the number of first coupling portions 101 can be one or more, and can be set according to actual needs, and is not limited to a single structure.

[0078] With this arrangement, since the first dual-mode medium 10 is provided with the first coupling portion 101 for coupling the two resonant modes of the first dual-mode medium 10, coupling between the two resonant modes of the first dual-mode medium 10 is not only facilitated, but also, by changing the position of the first coupling portion 101 on the first dual-mode medium 10, the electric field directions of the two resonant modes of the first dual-mode medium 10 can be changed, thereby facilitating changing the coupling polarity between the two resonant modes of the first dual-mode medium 10 (i.e., the two resonant modes of the first dual-mode medium 10 are positively coupled or negatively coupled, with a positive coupling polarity representing positive coupling and a negative coupling polarity representing negative coupling). This further facilitates changing the position of the transmission zero point (i.e., positioning the transmission zero point to the left or right of the passband of the dielectric filter), thereby facilitating control of the position of the transmission zero point.

[0079] Optionally, the first coupling portion 101 may be disposed on a side of the first dual-mode medium 10 (ie, a side edge of the first dual-mode medium 10 ), which is more conducive to coupling between the two resonant modes of the first dual-mode medium 10 .

[0080] Optionally, see Figure 1The first coupling portion 101 can be a coupling groove disposed at a corner or edge of the first dual-mode medium 10. This not only facilitates fabrication, but also allows the coupling strength between the two resonant modes of the first dual-mode medium 10 to be varied by changing the volume of the first dual-mode medium 10 occupied by the coupling groove. For example, the coupling strength (also referred to as the coupling amount or magnitude) between the two resonant modes of the first dual-mode medium 10 can be varied by changing at least one of the length, width, and depth of the coupling groove, thereby varying the coupling coefficient between the two resonant modes of the first dual-mode medium 10.

[0081] In one embodiment, see Figure 1 The first dual-mode medium 10 is provided with a first hole 102 and a second hole 103. The first hole 102 and the second hole 103 are not located on the same side of the first dual-mode medium 10 (for example, they may be located on adjacent sides of the first dual-mode medium 10; of course, when the first dual-mode medium 10 has an irregular shape, the first hole 102 and the second hole 103 may also be located on opposite sides of the first dual-mode medium 10, for example, when the circumferential side surface of the first dual-mode medium 10 has an arcuate surface or five or more flat surfaces, but this is not limited to such). The first hole 102 is used to adjust the resonant frequency of one resonant mode of the first dual-mode medium 10, and the second hole 103 is used to adjust the resonant frequency of the other resonant mode of the first dual-mode medium 10. It is understood that the number of first holes 102 can be one or more, and the number of second holes 103 can also be one or more, and can be set according to actual needs and is not limited to such.

[0082] With this arrangement, the resonant frequencies of the two resonant modes of the first dual-mode medium 10 can be adjusted respectively through the first hole 102 and the second hole 103 .

[0083] Optionally, see Figure 1 The first hole 102 and the second hole 103 can be circular holes; of course, the first hole 102 and the second hole 103 can also be polygonal holes, but are not limited thereto, and can also be holes of other regular or irregular shapes.

[0084] Alternatively, in one embodiment, see Figure 1 The first dual-mode medium 10 has a first outer surface and a second outer surface adjacent to each other. The first hole 102 is opened on the first outer surface, and the second hole 103 is opened on the second outer surface.

[0085] Optionally, see Figure 1 , the first hole 102 and the second hole 103 can both be blind holes.

[0086] In one embodiment, see Figure 1A first frequency adjustment hole 201 is provided on the first single-mode medium 20 to facilitate adjustment of the resonant frequency of the resonant mode of the first single-mode medium 20. Optionally, the first frequency adjustment hole 201 may be provided on any surface of the first single-mode medium 20, as long as the resonant frequency of the resonant mode of the first single-mode medium 20 can be adjusted.

[0087] Optionally, see Figure 1 The first frequency adjustment hole 201 may be a blind hole. Alternatively, the first frequency adjustment hole 201 may be a circular hole. Of course, the first frequency adjustment hole 201 may also be a polygonal hole, but is not limited thereto, and may also be other regular or irregular holes.

[0088] Alternatively, in one embodiment, see Figure 1 The depth of the first frequency adjustment hole 201 may be greater than or equal to one quarter of the depth of the first single-mode medium 20 ; wherein the depth direction of the first single-mode medium 20 is the same as the depth direction of the first frequency adjustment hole 201 .

[0089] In this configuration, since the depth of the first frequency adjustment hole 201 is greater than or equal to one-fourth of the depth of the first single-mode medium 20, the harmonics can be effectively pushed away, so that the second harmonic of the dielectric filter using the dielectric body 100 provided in the embodiment of the present application is farther away from the passband, which is beneficial to improving the performance of the dielectric filter.

[0090] It should be noted that the depth of the first frequency adjustment hole 201 is not limited thereto, and may also be other depths capable of adjusting the resonant frequency of the resonant mode of the first single-mode medium 20 .

[0091] Optionally, see Figure 1 The first frequency adjustment hole 201 can be arranged horizontally. For example, the axial direction of the first frequency adjustment hole 201 can be perpendicular to the height direction of the first single-mode medium 20, which is more conducive to adjusting the resonant frequency of the resonant mode of the first single-mode medium 20.

[0092] Of course, in some other embodiments, the first frequency adjustment hole 201 may also be arranged longitudinally, for example, the axis direction of the first frequency adjustment hole 201 may be parallel to the height direction of the first single-mode medium 20. In some other embodiments, the first frequency adjustment hole 201 may also be arranged along any other direction.

[0093] In one embodiment, see Figure 1The first dual-mode dielectric 10 is provided with a first connection end 111, and the first single-mode dielectric 20 is provided with a second connection end 112. One of the first connection end 111 and the second connection end 112 is an input end, and the other of the first connection end 111 and the second connection end 112 is an output end. Optionally, the first connection end 111 may be a hole structure provided in the first dual-mode dielectric 10; of course, in some other embodiments, the first connection end 111 may also be a protrusion structure. Optionally, the second connection end 112 may be a hole structure provided in the first single-mode dielectric 20; of course, in some other embodiments, the second connection end 112 may also be a protrusion structure.

[0094] This configuration facilitates a signal to be input from one of the first connection end 111 and the second connection end 112 and output from the other of the first connection end 111 and the second connection end 112 after passing through the dielectric body 100 .

[0095] It should be noted that, in some other embodiments, the first connection end 111 may not be provided on the first dual-mode medium 10, and the second connection end 112 may not be provided on the first single-mode medium 20. For example, the first dual-mode medium 10 may also be connected to other single-mode or multi-mode media (when the first dual-mode medium 10 is connected to other single-mode or multi-mode media, the first dual-mode medium 10 and the other single-mode or multi-mode media may be an integral structure or a structure connected in separate parts), to facilitate signal transmission between the first dual-mode medium 10 and the other single-mode or multi-mode media; the first single-mode medium 20 may also be connected to other single-mode or multi-mode media (when the first single-mode medium 20 is connected to other single-mode or multi-mode media, the first single-mode medium 20 and the other single-mode or multi-mode media may be an integral structure or a structure connected in separate parts), to facilitate signal transmission between the first single-mode medium 20 and the other single-mode or multi-mode media.

[0096] In another embodiment, see Figure 2 , the dielectric body 100 further includes a second dual-mode dielectric 40 and a second cross-coupling structure 50, wherein:

[0097] The second dual-mode medium 40 is a dual-mode medium structure having two resonant modes. The two resonant modes of the second dual-mode medium 40 can be orthogonal resonant modes, such as, but not limited to, two orthogonal degenerate modes. The second dual-mode medium 40 can have various shapes, such as a roughly cube or rectangular parallelepiped shape, with two resonant modes. Other shapes are also possible and are not intended to be limiting. It is understood that the structure of the second dual-mode medium 40 can be the same as or different from that of the first dual-mode medium 10.

[0098] The second cross-coupling structure 50 is connected to the second dual-mode medium 40 and the first single-mode medium 20, and is configured to cross-couple the second dual-mode medium 40 with the first single-mode medium 20. The second dual-mode medium 40 and the first single-mode medium 20 are cross-coupled, meaning that the two resonant modes of the second dual-mode medium 40 are coupled to the resonant modes of the first single-mode medium 20 in pairs. Specifically, one resonant mode of the second dual-mode medium 40 is coupled to the resonant mode of the first single-mode medium 20, the other resonant mode of the second dual-mode medium 40 is coupled to the resonant mode of the first single-mode medium 20, and the two resonant modes of the second dual-mode medium 40 are coupled to each other. The second cross-coupling structure 50 can be any structure that allows for cross-coupling between the second dual-mode medium 40 and the first single-mode medium 20, such as a block structure, a sheet structure, or a plate structure. It can also include, but is not limited to, a block structure, a sheet structure, or a plate structure and coupling slots, coupling surfaces, and the like. It can be understood that the structure of the second cross-coupling structure 50 may be the same as or different from the structure of the first cross-coupling structure 30 .

[0099] With this arrangement, since the second dual-mode dielectric 40 is connected to the first single-mode dielectric 20 via the second cross-coupling structure 50 and cross-coupled with the first single-mode dielectric 20, not only can the two resonant modes of the first dual-mode dielectric 10 and the resonant modes of the first single-mode dielectric 20 be mutually coupled in pairs, but the two resonant modes of the second dual-mode dielectric 40 and the resonant modes of the first single-mode dielectric 20 can also be mutually coupled in pairs. This facilitates the generation of two transmission zeros in the dielectric filter using the dielectric body 100 provided in the embodiment of the present application, further improving the out-of-band suppression performance of the dielectric filter. Moreover, the dielectric body 100 formed by the combination of the two dual-mode dielectrics and the single-mode dielectric can achieve better suppression performance while having a smaller volume, which facilitates improving the performance of the dielectric filter using the dielectric body 100 provided in the embodiment of the present application.

[0100] Alternatively, in one embodiment, see Figure 2 The first dual-mode medium 10, the first single-mode medium 20, the first cross-coupling structure 30, the second dual-mode medium 40 and the second cross-coupling structure 50 are an integrated structure.

[0101] With this arrangement, the dielectric body 100 can be manufactured through an integrated molding process, which reduces manufacturing difficulty and improves consistency, thereby improving the stability and reliability of the dielectric filter using the dielectric body 100 provided in the embodiment of the present application. Without increasing manufacturing difficulty, the dielectric filter using the dielectric body 100 provided in the embodiment of the present application can simultaneously achieve a small size, a second harmonic farther from the passband, and two transmission zeros, further improving the performance of the dielectric filter.

[0102] It should be noted that, in some other embodiments, the second cross-coupling structure 50 and the first single-mode medium 20 may also be connected in a splicing manner.

[0103] Alternatively, in one embodiment, see Figure 2 The second cross-coupling structure 50 includes a second coupling medium 51 and a second coupling structure 52. The second coupling medium 51 is connected to the second dual-mode medium 40 and the first single-mode medium 20, and is used to couple the second dual-mode medium 40 with the first single-mode medium 20. The second coupling structure 52 is disposed on the second dual-mode medium 40 or the first single-mode medium 20, and is used to couple the second dual-mode medium 40 with the first single-mode medium 20. It is understood that the second coupling medium 51 is a dielectric structure used to couple the second coupling medium 51 with the first single-mode medium 20. The second coupling medium 51 can be a dielectric structure of various shapes, such as, but not limited to, a block structure, a strip structure, or a sheet structure. The second coupling structure 52 is disposed on the second dual-mode medium 40 or the first single-mode medium 20, and is used to couple the second dual-mode medium 40 with the first single-mode medium 20. The second coupling structure 52 can be, but not limited to, a coupling groove, a coupling cutout, a coupling edge, or a coupling hole.

[0104] With such a configuration, one resonant mode of the second dual-mode medium 40 can be coupled to the resonant mode of the first single-mode medium 20 through the second coupling medium 51, and the other resonant mode of the second dual-mode medium 40 can be coupled to the resonant mode of the first single-mode medium 20 through the second coupling structure 52, thereby facilitating the coupling of the two resonant modes of the second dual-mode medium 40 with the resonant mode of the first single-mode medium 20 through a coupling channel respectively, thereby improving the cross-coupling effect and being more conducive to the dielectric filter using the dielectric body 100 provided in the embodiment of the present application to generate a transmission zero on one side of the passband.

[0105] It is understood that the structure of the second coupling medium 51 may be the same as or different from the structure of the first coupling medium 31 . The structure of the second coupling structure 52 may be the same as or different from the structure of the first coupling structure 32 .

[0106] It can be understood that when the second cross-coupling structure 50 , the second dual-mode medium 40 and the first single-mode medium 20 are an integrated structure, the second coupling medium 51 , the second dual-mode medium 40 and the first single-mode medium 20 are also an integrated structure.

[0107] It should be noted that the structure of the second cross-coupling structure 50 is not limited to this. Optionally, in some other embodiments, the second cross-coupling structure 50 may not include the second coupling structure 52. For example, the second cross-coupling structure 50 may be a second coupling medium 51, and both resonant modes of the second dual-mode medium 40 may be coupled to the resonant mode of the first single-mode medium 20 via the second coupling medium 51. That is, the two resonant modes of the second dual-mode medium 40 may be coupled to the resonant mode of the first single-mode medium 20 via the same coupling channel.

[0108] Alternatively, in one embodiment, see Figure 2 , the second coupling structure 52 is a coupling groove.

[0109] With this arrangement, since the second coupling structure 52 is a coupling slot, it can be directly formed in the second dual-mode medium 40 or the first single-mode medium 20, facilitating manufacturing. Furthermore, by varying the volume of the second dual-mode medium 40 or the first single-mode medium 20 occupied by the coupling slot, the coupling strength (also referred to as the coupling amount or magnitude) between one of the resonant modes of the second dual-mode medium 40 and the resonant mode of the first single-mode medium 20 can be varied. For example, the coupling strength between one of the resonant modes of the second dual-mode medium 40 and the resonant mode of the first single-mode medium 20 can be varied by varying at least one of the length, width, and depth of the coupling slot, thereby further facilitating coupling of one of the resonant modes of the second dual-mode medium 40 with the resonant mode of the first single-mode medium 20 via the coupling slot.

[0110] It should be noted that the structure of the second coupling structure 52 is not limited to this. Optionally, in other embodiments, the second coupling structure 52 may also be a corner-cut structure, a cut-edge structure, a hole structure, etc. For example, a corner-cut structure or a cut-edge structure may be provided at a corner or edge of the second dual-mode medium 40 or the first single-mode medium 20.

[0111] Alternatively, in one embodiment, see Figure 2 The second coupling structure 52 is provided on the second dual-mode medium 40 on a side close to the first single-mode medium 20 ; the second coupling structure 52 is located on one side of the second coupling medium 51 . Optionally, the second coupling structure 52 may be adjacent to the second coupling medium 51 .

[0112] With this arrangement, since the second coupling structure 52 is provided on the second dual-mode medium 40 on a side close to the first single-mode medium 20 and on a side of the second coupling medium 51, the second coupling structure 52 is closer to the second coupling medium 51. This facilitates the coupling of the two resonant modes of the second dual-mode medium 40 with the resonant mode of the first single-mode medium 20 via the second coupling structure 52 and the second coupling medium 51, respectively, thereby improving the cross-coupling effect.

[0113] Of course, the location of the second coupling structure 52 is not limited to this. Optionally, in other embodiments, the second coupling structure 52 and the second coupling medium 51 may be at a certain distance, as long as one of the resonant modes of the second dual-mode medium 40 can be coupled to the resonant mode of the first single-mode medium 20 through the second coupling structure 52.

[0114] Alternatively, in one embodiment, see Figure 2 The second dual-mode medium 40 is provided with a second coupling portion 401 for coupling the two resonant modes of the second dual-mode medium 40. It is understood that the second coupling portion 401 can be any structure capable of coupling the two resonant modes of the second dual-mode medium 40, such as, but not limited to, a coupling groove, a coupling cutout, a coupling edge, or a coupling hole. It is understood that the number of second coupling portions 401 can be one or more, and can be set according to actual needs, and is not limited to a single structure.

[0115] With this arrangement, since the second dual-mode medium 40 is provided with a second coupling portion 401 for coupling the two resonant modes of the second dual-mode medium 40, coupling between the two resonant modes of the second dual-mode medium 40 is not only facilitated, but also, by changing the position of the second coupling portion 401 on the second dual-mode medium 40, the electric field directions of the two resonant modes of the second dual-mode medium 40 can be changed, thereby facilitating changing the coupling polarity between the two resonant modes of the second dual-mode medium 40 (i.e., the two resonant modes of the second dual-mode medium 40 are positively coupled or negatively coupled, with a positive coupling polarity representing positive coupling and a negative coupling polarity representing negative coupling). This further facilitates changing the position of the transmission zero point, thereby facilitating control of the position of the transmission zero point.

[0116] Optionally, the second coupling portion 401 may be disposed on a side of the second dual-mode medium 40 (ie, a side edge of the second dual-mode medium 40 ), which is more conducive to coupling between the two resonant modes of the second dual-mode medium 40 .

[0117] Optionally, see Figure 2 The second coupling portion 401 can be a coupling groove disposed at a corner or edge of the second dual-mode medium 40. This not only facilitates fabrication, but also allows the coupling strength between the two resonant modes of the second dual-mode medium 40 to be varied by changing the volume of the second dual-mode medium 40 occupied by the coupling groove. For example, the coupling strength (also referred to as the coupling amount or magnitude) between the two resonant modes of the second dual-mode medium 40 can be varied by changing at least one of the length, width, and depth of the coupling groove, thereby varying the coupling coefficient between the two resonant modes of the second dual-mode medium 40.

[0118] In one embodiment, see Figure 2The second dual-mode medium 40 is provided with a third hole 402 and a fourth hole 403. The third hole 402 and the fourth hole 403 are not located on the same side of the second dual-mode medium 40 (for example, they may be located on adjacent or opposite sides of the second dual-mode medium 40). The third hole 402 is used to adjust the resonant frequency of one resonant mode of the second dual-mode medium 40, and the fourth hole 403 is used to adjust the resonant frequency of the other resonant mode of the second dual-mode medium 40. It is understood that the number of third holes 402 can be one or more, and the number of fourth holes 403 can also be one or more, and can be set according to actual needs and is not limited here.

[0119] With this arrangement, the resonant frequencies of the two resonant modes of the second dual-mode medium 40 can be adjusted respectively through the third hole 402 and the fourth hole 403 .

[0120] Optionally, see Figure 2 The third hole 402 and the fourth hole 403 can be circular holes; of course, the third hole 402 and the fourth hole 403 can also be polygonal holes, but are not limited thereto, and can also be holes of other regular or irregular shapes.

[0121] Alternatively, in one embodiment, see Figure 2 The second dual-mode medium 40 has adjacent third and fourth outer surfaces, the third hole 402 is formed on the third outer surface, and the fourth hole 403 is formed on the fourth outer surface. Optionally, the third hole 402 and the fourth hole 403 can both be blind holes.

[0122] Alternatively, in one embodiment, see Figure 2 , a first coupling portion 101 is provided on the first dual-mode medium 10 for coupling the two resonant modes of the first dual-mode medium 10. A second coupling portion 401 is provided on the second dual-mode medium 40 for coupling the two resonant modes of the second dual-mode medium 40. The coupling polarity between the two resonant modes of the first dual-mode medium 10 is opposite to the coupling polarity between the two resonant modes of the second dual-mode medium 40; for example, the two resonant modes of the first dual-mode medium 10 can be positively coupled, and the two resonant modes of the second dual-mode medium 40 can be negatively coupled; or, the two resonant modes of the first dual-mode medium 10 can be negatively coupled, and the two resonant modes of the second dual-mode medium 40 can be positively coupled. Optionally, please refer to Figure 2 The first coupling portion 101 and the second coupling portion 401 can be located on different sides of the dielectric body 100 so that the coupling polarity between the two resonant modes of the first dual-mode dielectric 10 is opposite to the coupling polarity between the two resonant modes of the second dual-mode dielectric 40.

[0123] In this arrangement, since the first dual-mode medium 10 is provided with a first coupling portion 101 for coupling the two resonant modes of the first dual-mode medium 10, and the second dual-mode medium 40 is provided with a second coupling portion 401 for coupling the two resonant modes of the second dual-mode medium 40, and the coupling polarity between the two resonant modes of the first dual-mode medium 10 is opposite to the coupling polarity between the two resonant modes of the second dual-mode medium 40, a transmission zero point can be generated on both sides of the passband of the dielectric filter using the dielectric body 100 provided by the embodiment of the present application, thereby effectively improving the out-of-band suppression performance of the dielectric filter.

[0124] Alternatively, in one embodiment, see Figure 2 The first dual-mode medium 10 is provided with a first connection terminal 111, and the second dual-mode medium 40 is provided with a second connection terminal 112. One of the first connection terminal 111 and the second connection terminal 112 is an input terminal, and the other is an output terminal. The structure of the first connection terminal 111 can be the same as that of the first connection terminal 111 in the above-mentioned embodiment, and the second connection terminal 112 can be the same as that of the second connection terminal 112 in the above-mentioned embodiment. In this embodiment, only the location of the second connection terminal 112 is different, which will not be further described here.

[0125] In another embodiment, see Figure 3 and Figure 4 The dielectric body 100 includes a second single-mode dielectric 60, a coupling dielectric 70, a second dual-mode dielectric 40, and a second cross-coupling structure 50. The coupling dielectric 70 is connected to the first single-mode dielectric 20 and the second single-mode dielectric 60, and is used to couple the first single-mode dielectric 20 with the second single-mode dielectric 60. The coupling dielectric 70 is a dielectric structure that couples the first single-mode dielectric 20 with the second single-mode dielectric 60. It can have various shapes, such as, but not limited to, a block structure, a plate structure, or a sheet structure. The second single-mode dielectric 60 is a single-mode dielectric structure having a single resonant mode. The structure of the second single-mode dielectric 60 can be the same as or different from that of the first single-mode dielectric 20. The second cross-coupling structure 50 is connected to the second dual-mode medium 40 and the second single-mode medium 60, and is used to provide cross-coupling between the second dual-mode medium 40 and the second single-mode medium 60, that is, the two resonant modes of the second dual-mode medium 40 are coupled to the resonant mode of the second single-mode medium 60 in pairs; that is, one resonant mode of the second dual-mode medium 40 is coupled to the resonant mode of the second single-mode medium 60, the other resonant mode of the second dual-mode medium 40 is coupled to the resonant mode of the second single-mode medium 60, and the two resonant modes of the second dual-mode medium 40 are also coupled.

[0126] It can be understood that the structures of the second dual-mode medium 40 and the second cross-coupling structure 50 can be respectively the same as the structures of the second dual-mode medium 40 and the second cross-coupling structure 50 in the above-mentioned embodiment. In this embodiment, the second cross-coupling structure 50 is only connected to the second single-mode medium 60 and the second dual-mode medium 40, which is different from the above-mentioned embodiment in which the second cross-coupling structure 50 is connected to the first single-mode medium 20 and the second dual-mode medium 40. That is, the second single-mode medium 60 is only provided between the second dual-mode medium 40 and the first single-mode medium 20.

[0127] With this arrangement, since the second dual-mode dielectric 40 is connected to the second single-mode dielectric 60 via the second cross-coupling structure 50 and cross-coupled with the second single-mode dielectric 60, and the second single-mode dielectric 60 is coupled to the first single-mode dielectric 20 via the coupling medium 70, the two resonant modes of the first dual-mode dielectric 10 and the resonant modes of the first single-mode dielectric 20 can be mutually coupled in pairs, while the two resonant modes of the second dual-mode dielectric 40 and the resonant modes of the second single-mode dielectric 60 can also be mutually coupled in pairs. This facilitates the generation of two transmission zeros in the dielectric filter using the dielectric body 100 provided in the embodiment of the present application, further improving the out-of-band suppression performance of the dielectric filter. Moreover, the dielectric body 100 formed by combining two dual-mode dielectrics with two single-mode dielectrics can achieve better suppression performance while having a smaller volume, and can further push out harmonics, making the second harmonic farther from the passband, which further improves the performance of the dielectric filter using the dielectric body 100 provided in the embodiment of the present application.

[0128] Alternatively, in one embodiment, see Figure 3 and Figure 4 The first single-mode medium 20, the second single-mode medium 60, and the coupling medium 70 are an integrated structure. The second single-mode medium 60, the second dual-mode medium 40, and the second cross-coupling structure 50 are an integrated structure. In other words, the first dual-mode medium 10, the first single-mode medium 20, the first cross-coupling structure 30, the second dual-mode medium 40, the second single-mode medium 60, the second cross-coupling structure 50, and the coupling medium 70 are an integrated structure.

[0129] With this arrangement, the dielectric body 100 can be manufactured through an integrated molding process, which reduces manufacturing difficulty and improves consistency, thereby improving the stability and reliability of the dielectric filter using the dielectric body 100 provided in the embodiment of the present application. Without increasing manufacturing difficulty, the dielectric filter using the dielectric body 100 provided in the embodiment of the present application can simultaneously achieve a small size, a second harmonic farther from the passband, and two transmission zeros, further improving the performance of the dielectric filter.

[0130] Of course, in some other embodiments, only the first single-mode medium 20, the second single-mode medium 60, and the coupling medium 70 may be an integrated structure, and the second cross-coupling structure 50 and the second single-mode medium 60 may be connected by splicing, or the second cross-coupling structure 50 and the second dual-mode medium 40 may be connected by splicing.

[0131] In some other embodiments, only the second single-mode medium 60, the second dual-mode medium 40, and the second cross-coupling structure 50 may be an integrated structure, and the coupling medium 70 and the first single-mode medium 20 may be connected by splicing, or the coupling medium 70 and the second single-mode medium 60 may be connected by splicing.

[0132] In some other embodiments, the second cross-coupling structure 50 and the second single-mode medium 60 may be connected in a splicing manner, or the second cross-coupling structure 50 and the second dual-mode medium 40 may be connected in a splicing manner; at the same time, the coupling medium 70 and the first single-mode medium 20 may be connected in a splicing manner, or the coupling medium 70 and the second single-mode medium 60 may be connected in a splicing manner.

[0133] Alternatively, in one embodiment, see Figure 3 and Figure 4 The second cross-coupling structure 50 includes a second coupling medium 51 and a second coupling structure 52. The second coupling medium 51 is connected to the second dual-mode medium 40 and the second single-mode medium 60 for coupling between the second dual-mode medium 40 and the second single-mode medium 60. The second coupling structure 52 is disposed on the second dual-mode medium 40 or the second single-mode medium 60 for coupling between the second dual-mode medium 40 and the second single-mode medium 60. It will be appreciated that the structures of the second coupling medium 51 and the second coupling structure 52 in this embodiment are identical to those of the second coupling medium 51 and the second coupling structure 52 in the above-described embodiment and are not further described herein.

[0134] With such a configuration, one of the resonant modes of the second dual-mode medium 40 can be coupled to the resonant mode of the second single-mode medium 60 through the second coupling medium 51, and the other resonant mode of the second dual-mode medium 40 can be coupled to the resonant mode of the second single-mode medium 60 through the second coupling structure 52, thereby facilitating the two resonant modes of the second dual-mode medium 40 to be coupled to the resonant mode of the second single-mode medium 60 through a coupling channel respectively, thereby improving the cross-coupling effect and being more conducive to the dielectric filter using the dielectric body 100 provided in the embodiment of the present application to generate a transmission zero on one side of the passband.

[0135] Alternatively, in one embodiment, see Figure 3 , the second coupling structure 52 can be a coupling groove.

[0136] With this arrangement, since the second coupling structure 52 is a coupling slot, it can be directly formed in the second dual-mode medium 40 or the second single-mode medium 60, facilitating manufacturing. Furthermore, by varying the volume of the second dual-mode medium 40 or the second single-mode medium 60 occupied by the coupling slot, the coupling strength (also referred to as the coupling amount or magnitude) between one of the resonant modes of the second dual-mode medium 40 and a resonant mode of the second single-mode medium 60 can be varied. For example, the coupling strength between one of the resonant modes of the second dual-mode medium 40 and a resonant mode of the second single-mode medium 60 can be varied by varying at least one of the length, width, and depth of the coupling slot, thereby further facilitating coupling of one of the resonant modes of the second dual-mode medium 40 with a resonant mode of the second single-mode medium 60 via the coupling slot.

[0137] Alternatively, in one embodiment, see Figure 3 The second coupling structure 52 can be opened on a side of the second dual-mode medium 40 close to the second single-mode medium 60 ; the second coupling structure 52 can be located on a side of the second coupling medium 51 .

[0138] With this arrangement, since the second coupling structure 52 is provided on the second dual-mode medium 40 on a side close to the second single-mode medium 60 and located on one side of the second coupling medium 51, the second coupling structure 52 is closer to the second coupling medium 51. This facilitates the coupling of the two resonant modes of the second dual-mode medium 40 with the resonant mode of the second single-mode medium 60 via the second coupling structure 52 and the second coupling medium 51, respectively, thereby improving the cross-coupling effect.

[0139] Alternatively, in one embodiment, see Figure 3 The second dual-mode medium 40 is provided with a second coupling portion 401 for coupling the two resonant modes of the second dual-mode medium 40. It is understood that the structure of the second coupling portion 401 can be the same as that of the second coupling portion 401 in the above embodiment, and is not described here in detail.

[0140] Alternatively, in one embodiment, see Figure 3 The second dual-mode medium 40 is provided with a third hole 402 and a fourth hole 403. The third hole 402 and the fourth hole 403 are not located on the same side of the second dual-mode medium 40 (for example, they may be located on adjacent or opposite sides of the second dual-mode medium 40). The third hole 402 is used to adjust the resonant frequency of one resonant mode of the second dual-mode medium 40, and the fourth hole 403 is used to adjust the resonant frequency of the other resonant mode of the second dual-mode medium 40. It is understood that the number of third holes 402 can be one or more, and the number of fourth holes 403 can also be one or more, and can be set according to actual needs and is not limited here.

[0141] Alternatively, in one embodiment, see Figure 3 and Figure 4 A second frequency adjustment hole 601 is provided on the second single-mode medium 60 to facilitate adjustment of the resonant frequency of the resonant mode of the second single-mode medium 60. Optionally, the second frequency adjustment hole 601 may be provided on any surface of the second single-mode medium 60, as long as the resonant frequency of the resonant mode of the second single-mode medium 60 can be adjusted.

[0142] Optionally, see Figure 3 , the second frequency adjustment hole 601 can be a blind hole. Figure 3 The second frequency adjustment hole 601 may be a circular hole; of course, the second frequency adjustment hole 601 may also be a polygonal hole, but is not limited thereto, and may also be other holes of regular or irregular shapes.

[0143] Optionally, in one embodiment, the depth of the second frequency adjustment hole 601 may be greater than or equal to one quarter of the depth of the second single-mode medium 60 ; wherein the depth direction of the second single-mode medium 60 is the same as the depth direction of the second frequency adjustment hole 601 .

[0144] In this configuration, since the depth of the second frequency adjustment hole 601 is greater than or equal to one-fourth of the depth of the second single-mode medium 60, the harmonics can be effectively pushed away, so that the second harmonic of the dielectric filter using the dielectric body 100 provided in the embodiment of the present application is farther away from the passband, which is beneficial to improving the performance of the dielectric filter.

[0145] It should be noted that the depth of the second frequency adjustment hole 601 is not limited thereto, and may also be other depths capable of adjusting the resonant frequency of the resonant mode of the second single-mode medium 60 .

[0146] Optionally, see Figure 3 The second frequency adjustment hole 601 can be arranged horizontally. For example, the axial direction of the second frequency adjustment hole 601 can be perpendicular to the height direction of the second single-mode medium 60, which is more conducive to adjusting the resonant frequency of the resonant mode of the second single-mode medium 60.

[0147] Of course, in some other embodiments, the second frequency adjustment hole 601 may also be arranged longitudinally, for example, the axis direction of the second frequency adjustment hole 601 may be parallel to the height direction of the second single-mode medium 60. In some other embodiments, the second frequency adjustment hole 601 may also be arranged along any other direction.

[0148] Alternatively, in one embodiment, see Figure 3 and Figure 4The first dual-mode medium 10 is provided with a first coupling portion 101 for coupling the two resonant modes of the first dual-mode medium 10. The second dual-mode medium 40 is provided with a second coupling portion 401 for coupling the two resonant modes of the second dual-mode medium 40. The coupling polarity between the two resonant modes of the first dual-mode medium 10 is opposite to the coupling polarity between the two resonant modes of the second dual-mode medium 40. Optionally, the first coupling portion 101 and the second coupling portion 401 can be located on different sides of the dielectric body 100, so that the coupling polarity between the two resonant modes of the first dual-mode medium 10 is opposite to the coupling polarity between the two resonant modes of the second dual-mode medium 40.

[0149] Such an arrangement can generate a transmission zero point on both sides of the passband of the dielectric filter using the dielectric body 100 provided by the embodiment of the present application, thereby effectively improving the out-of-band suppression performance of the dielectric filter.

[0150] Alternatively, in one embodiment, see Figure 3 The first dual-mode medium 10 is provided with a first connection terminal 111, and the second dual-mode medium 40 is provided with a second connection terminal 112. One of the first connection terminal 111 and the second connection terminal 112 is an input terminal, and the other is an output terminal. The structure of the first connection terminal 111 can be the same as that of the first connection terminal 111 in the above-mentioned embodiment, and the structure of the second connection terminal 112 can be the same as that of the second connection terminal 112 in the above-mentioned embodiment. In this embodiment, only the location of the second connection terminal 112 is different, which will not be repeated here.

[0151] The above embodiments describe the cross-coupling of the first dual-mode medium 10 with the first single-mode medium 20, the cross-coupling of both the first dual-mode medium 10 and the second dual-mode medium 40 with the first single-mode medium 20, and the cross-coupling of the first dual-mode medium 10 and the second dual-mode medium 40 with the first single-mode medium 20 and the second single-mode medium 60, respectively. However, the present invention is not limited to these combinations. It should be noted that, in addition to one or two single-mode media, three or more single-mode media may be provided between the first dual-mode medium 10 and the second dual-mode medium 40. Furthermore, one or more multimode media may also be provided.

[0152] See also Figure 3 and Figure 5The present application also provides a dielectric filter 1000 in an embodiment. The dielectric filter 1000 includes a metal layer 200 and a dielectric body 100 according to any of the above-described embodiments. The metal layer 200 is coated on the outer surface of the dielectric body 100 to protect the dielectric body 100 from internal signal leakage and external interference. It is understood that the metal layer 200 can be formed by various existing methods of providing a metal layer on the outer surface of a dielectric body, or by an improved method of providing a metal layer on the outer surface of a dielectric body. Optionally, the metal layer 200 can be made of various metal materials. It can be a single metal material, such as a silver layer; or a composite metal material, such as a copper / nickel composite layer, a copper / aluminum composite layer, etc. The material of the metal layer 200 is not limited to a single material.

[0153] Since the dielectric filter 1000 provided in the embodiment of the present application adopts the above-mentioned dielectric body 100, it also has the technical effects brought by the technical solution of the dielectric body 100 of any of the above-mentioned embodiments. Without increasing the manufacturing difficulty, the dielectric filter 1000 can be made to have a smaller size, a second harmonic farther from the passband, and a transmission zero point, thereby effectively improving the performance of the dielectric filter 1000.

[0154] For example, see Figure 6 , through Figure 5 The dielectric filter 1000 shown in FIG is simulated to obtain an amplitude-frequency characteristic curve of the dielectric filter 1000 (ie, an S parameter characteristic simulation diagram). Figure 6 It can be seen that transmission zeros are generated on the left side (or low end) and the right side (or high end) of the passband of the dielectric filter 1000, and the second harmonic is far away from the passband, so the dielectric filter 1000 has good out-of-band suppression performance.

[0155] It can be understood that the above description is mainly intended to illustrate the innovation of the dielectric filter 1000 provided in the embodiment of the present application. In addition to including the above-mentioned components, the dielectric filter 1000 provided in the embodiment of the present application may also have other components. The other components can adopt the components of the existing dielectric filter. This is well known to ordinary technicians in this field and will not be repeated here.

[0156] In addition, the shapes of the dielectric body 100 and the metal layer 200 shown in the drawings are for illustrative purposes only and are not limited to the shapes shown in the drawings.

[0157] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A dielectric body, characterized in that: The medium body includes: a first dual-mode medium; a first single-mode medium; and a first cross-coupling structure, the first cross-coupling structure being connected to the first dual-mode medium and the first single-mode medium, and being configured to cross-couple the first dual-mode medium and the first single-mode medium, so that two resonant modes of the first dual-mode medium and a resonant mode of the first single-mode medium can couple with each other in pairs; Wherein, the first dual-mode medium, the first single-mode medium and the first cross-coupling structure are an integrated structure; The first cross-coupling structure includes: a first coupling medium, the first coupling medium being connected to the first dual-mode medium and the first single-mode medium and configured to couple the first dual-mode medium with the first single-mode medium; and a first coupling structure, the first coupling structure being provided on the first dual-mode medium or the first single-mode medium and being used for coupling the first dual-mode medium with the first single-mode medium; The first coupling structure is a coupling slot; The first coupling structure is opened on a side of the first dual-mode medium close to the first single-mode medium; the first coupling structure is located on one side of the first coupling medium; the two resonant modes of the first dual-mode medium are coupled with the resonant mode of the first single-mode medium through the first coupling structure and the first coupling medium respectively.

2. The dielectric body according to claim 1, wherein: The first dual-mode medium has a cubic structure; and / or The first single-mode medium has a rectangular parallelepiped structure; and / or The first dual-mode medium is provided with a first coupling portion for coupling two resonant modes of the first dual-mode medium; and / or The first dual-mode medium is provided with a first hole and a second hole, the first hole and the second hole are not located on the same side of the first dual-mode medium, the first hole is used to adjust the resonant frequency of one resonant mode of the first dual-mode medium, and the second hole is used to adjust the resonant frequency of the other resonant mode of the first dual-mode medium; and / or A first frequency adjustment hole is provided on the first single-mode medium; and / or A first connection end is provided on the first dual-mode medium, and a second connection end is provided on the first single-mode medium; one of the first connection end and the second connection end is an input end, and the other is an output end.

3. The dielectric body according to claim 1 or 2, characterized in that: The medium body includes: a second dual-mode medium; and A second cross-coupling structure is connected to the second dual-mode medium and the first single-mode medium, and is used for cross-coupling the second dual-mode medium and the first single-mode medium.

4. The dielectric body according to claim 3, wherein: The first dual-mode medium, the first single-mode medium, the first cross-coupling structure, the second dual-mode medium and the second cross-coupling structure are an integrated structure; and / or The second dual-mode medium has a cube structure; and / or The second cross-coupling structure includes: a second coupling medium connected to the second dual-mode medium and the first single-mode medium, for coupling the second dual-mode medium with the first single-mode medium; and a second coupling structure, the second coupling structure being provided on the second dual-mode medium or the first single-mode medium and being used for coupling the second dual-mode medium with the first single-mode medium; The second coupling structure is a coupling slot; the second coupling structure is opened on a side of the second dual-mode medium close to the first single-mode medium; the second coupling structure is located on one side of the second coupling medium; and / or The second dual-mode medium is provided with a second coupling portion for coupling the two resonant modes of the second dual-mode medium; and / or A third hole and a fourth hole are formed in the second dual-mode medium, the third hole and the fourth hole are not located on the same side of the second dual-mode medium, the third hole is used to adjust the resonant frequency of one resonant mode of the second dual-mode medium, and the fourth hole is used to adjust the resonant frequency of the other resonant mode of the second dual-mode medium; and / or The first dual-mode medium is provided with a first coupling portion for coupling the two resonant modes of the first dual-mode medium; the second dual-mode medium is provided with a second coupling portion for coupling the two resonant modes of the second dual-mode medium; wherein the coupling polarity between the two resonant modes of the first dual-mode medium is opposite to the coupling polarity between the two resonant modes of the second dual-mode medium; and / or The first dual-mode medium is provided with a first connection end, and the second dual-mode medium is provided with a second connection end; one of the first connection end and the second connection end is an input end, and the other is an output end.

5. The dielectric body according to claim 1 or 2, characterized in that: The medium body includes: a second single-mode medium; a coupling medium connected to the second single-mode medium and the first single-mode medium, and configured to couple the second single-mode medium with the first single-mode medium; a second dual-mode medium; and A second cross-coupling structure is connected to the second dual-mode medium and the second single-mode medium, and is used for cross-coupling the second dual-mode medium and the second single-mode medium.

6. The dielectric body according to claim 5, wherein: The first single-mode medium, the second single-mode medium, and the coupling medium are an integrated structure; and / or the second single-mode medium, the second dual-mode medium, and the second cross-coupling structure are an integrated structure; and / or The second dual-mode medium has a cube structure; and / or The second single-mode medium has a rectangular parallelepiped structure; and / or The second cross-coupling structure includes: a second coupling medium connected to the second dual-mode medium and the second single-mode medium, and configured to couple the second dual-mode medium with the second single-mode medium; and a second coupling structure, the second coupling structure being provided on the second dual-mode medium or the second single-mode medium and being used for coupling the second dual-mode medium with the second single-mode medium; The second coupling structure is a coupling slot; the second coupling structure is opened on a side of the second dual-mode medium close to the second single-mode medium; the second coupling structure is located on one side of the second coupling medium; and / or The second dual-mode medium is provided with a second coupling portion for coupling the two resonant modes of the second dual-mode medium; and / or A third hole and a fourth hole are formed in the second dual-mode medium, the third hole and the fourth hole are not located on the same side of the second dual-mode medium, the third hole is used to adjust the resonant frequency of one resonant mode of the second dual-mode medium, and the fourth hole is used to adjust the resonant frequency of the other resonant mode of the second dual-mode medium; and / or A second frequency adjustment hole is provided on the second single-mode medium; and / or The first dual-mode medium is provided with a first coupling portion for coupling the two resonant modes of the first dual-mode medium; the second dual-mode medium is provided with a second coupling portion for coupling the two resonant modes of the second dual-mode medium; wherein the coupling polarity between the two resonant modes of the first dual-mode medium is opposite to the coupling polarity between the two resonant modes of the second dual-mode medium; and / or The first dual-mode medium is provided with a first connection end, and the second dual-mode medium is provided with a second connection end; one of the first connection end and the second connection end is an input end, and the other is an output end.

7. A dielectric filter, characterized in that: The dielectric filter comprises: The dielectric body according to any one of claims 1 to 6; and A metal layer is coated on the outer surface of the dielectric body.

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