CN216793959U

CN216793959U - Dielectric body and dielectric filter

Info

Publication number: CN216793959U
Application number: CN202220430703.8U
Authority: CN
Inventors: 谢振雄; 吴亚晖; 李�杰
Original assignee: Anhui Tatfook Technology Co Ltd
Current assignee: Anhui Tatfook Technology Co Ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-06-21
Anticipated expiration: 2032-02-28

Abstract

The application relates to the technical field of communication, and provides a dielectric body and a dielectric filter, and the dielectric body includes: a first dual-mode dielectric; a first single-mode medium; 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; the first dual-mode medium, the first single-mode medium and the first cross-coupling structure are of an integrated structure. By adopting the dielectric filter of the dielectric body, the characteristics of smaller size, longer distance between the second harmonic and the passband and zero transmission can be realized without increasing the manufacturing difficulty.

Description

Dielectric body and dielectric filter

Technical Field

The present application relates to the field of communications technologies, and in particular, to a dielectric body and a dielectric filter having the same.

Background

At present, a dielectric filter is difficult to simultaneously realize the characteristics of smaller size, longer distance between second harmonic and a passband and transmission zero without increasing the manufacturing difficulty, and the performance and the application of the filter are influenced.

SUMMERY OF THE UTILITY MODEL

The present application aims to provide a dielectric body and a dielectric filter, so as to solve the technical problems that in the related art, the dielectric filter is difficult to realize smaller size, the second harmonic is far away from the passband and has a transmission zero point without increasing the manufacturing difficulty.

To achieve the above object, an aspect of the present application provides a dielectric body, including: a first dual-mode dielectric; a first single-mode medium; and a first cross-coupling structure connected to the first dual-mode medium and the first single-mode medium, 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 integral structure.

In one embodiment, the first cross-coupling structure comprises: a first coupling medium connected to the first dual-mode medium and the first single-mode medium, for coupling the first dual-mode medium with the first single-mode medium; and a first coupling structure disposed on the first dual-mode medium or the first single-mode medium, for coupling the first dual-mode medium with the first single-mode medium.

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

In one embodiment, the first coupling structure opens on a side of the first dual-mode medium that is proximate to the first single-mode medium; the first coupling structure is located on one side of the first coupling medium.

In one embodiment, the first dual-mode dielectric has a cubic structure.

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

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

In one embodiment, 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 for adjusting a resonant frequency of one resonant mode of the first dual-mode medium, and the second hole is used for adjusting a resonant frequency of the other resonant mode of the first dual-mode medium.

In one embodiment, the first single-mode medium has a first frequency adjustment hole formed therein.

In one embodiment, a first connecting end is arranged on the first dual-mode medium, and a second connecting end is arranged on the first single-mode medium; one of the first connecting end and the second connecting end is an input end, and the other one is an output end.

In one embodiment, the dielectric body comprises: a second bimodal medium; and a second cross-coupling structure connected to the second dual-mode medium and the first single-mode medium for cross-coupling the second dual-mode medium and the first single-mode medium.

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 a unitary structure.

In one embodiment, the second bimodal medium is a cubic structure.

In one embodiment, the second cross-coupling structure comprises: 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 disposed on the second dual-mode medium or the first single-mode medium for coupling the second dual-mode medium with the first single-mode medium.

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

In one embodiment, the second coupling structure opens on a side of the second dual-mode medium that is adjacent to the first single-mode medium; the second coupling structure is located on one side of the second coupling medium.

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

In one embodiment, the second dual-mode medium is provided with a third hole and a fourth hole, 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 for adjusting the resonance frequency of one resonance mode of the second dual-mode medium, and the fourth hole is used for adjusting the resonance frequency of the other resonance mode of the second dual-mode medium.

In one embodiment, a first coupling part is arranged on the first dual-mode medium and is used for coupling two resonance modes of the first dual-mode medium; the second dual-mode medium is provided with a second coupling part for coupling two resonance modes of the second dual-mode medium; wherein a polarity of coupling between the two resonant modes of the first dual-mode medium is opposite to a polarity of coupling between the two resonant modes of the second dual-mode medium.

In one embodiment, the first dual mode dielectric is provided with a first connecting end, and the second dual mode dielectric is provided with a second connecting end; one of the first connecting end and the second connecting end is an input end, and the other one is an output end.

In one embodiment, the dielectric body comprises: a second single-mode medium; a coupling medium connected to the second single-mode medium and the first single-mode medium, for coupling the second single-mode medium and the first single-mode medium; a second bimodal medium; and a second cross-coupling structure connected to the second dual-mode medium and the second single-mode medium for cross-coupling the second dual-mode medium and the second single-mode medium.

In one embodiment, the first single-mode medium, the second single-mode medium, and the coupling medium are a unitary structure; and/or the second single-mode medium, the second dual-mode medium and the second cross-coupling structure are of an integral structure.

In one embodiment, the second bimodal medium is a cubic structure.

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

In one embodiment, the second cross-coupling structure comprises: a second coupling medium connected to the second dual-mode medium and the second single-mode medium for coupling the second dual-mode medium and the second single-mode medium; and a second coupling structure disposed on the second dual-mode medium or the second single-mode medium for coupling the second dual-mode medium with the second single-mode medium.

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

In one embodiment, the second coupling structure opens on a side of the second dual-mode medium that is proximate to the second single-mode medium; the second coupling structure is located on one side of the second coupling medium.

In one embodiment, the second single-mode medium is provided with a second frequency adjusting hole.

In one embodiment, a first coupling part is arranged on the first dual-mode medium and is used for coupling two resonance modes of the first dual-mode medium; the second dual-mode medium is provided with a second coupling part for coupling two resonance modes of the second dual-mode medium; wherein a coupling polarity between the two resonant modes of the first dual-mode medium is opposite to a coupling polarity between the two resonant modes of the second dual-mode medium.

In one embodiment, the first dual mode dielectric is provided with a first connecting end, and the second dual mode dielectric is provided with a second connecting end; one of the first connection end and the second connection end is an input end, and the other one of the first connection end and the second connection end is an output end.

Another aspect of the present application provides a dielectric filter including: the dielectric body of any of the above embodiments; and the metal layer is coated on the outer surface of the dielectric body.

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

according to the dielectric body provided by the embodiment of the application, the first dual-mode medium, the first single-mode medium and the first cross coupling structure are arranged, 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 between the first dual-mode medium and the first single-mode medium, so that two resonance modes of the first dual-mode medium and two resonance modes of the first single-mode medium can be mutually coupled pairwise, a transmission zero point is generated by a dielectric filter adopting the dielectric body provided by the embodiment of the application, and the suppression performance of the dielectric filter is further improved; in addition, the first single-mode medium can push away harmonic waves due to the cross coupling with the first dual-mode medium, so that the problem that the harmonic waves are closer to a passband is solved, and the second harmonic waves of the dielectric filter adopting the dielectric body provided by the embodiment of the application are further away from the passband; simultaneously, through setting up first double mode medium, first single mode medium and first cross-coupling structure formula structure as an organic whole, can make the dielectric body through integrated into one piece's mode, the production manufacturing difficulty is lower, and the uniformity is better, does benefit to the stability and the reliability that improve the dielectric filter who adopts the dielectric body that this application embodiment provided. Therefore, the dielectric body provided by the embodiment of the application can simultaneously realize the dielectric filter adopting the dielectric body provided by the embodiment of the application to have smaller size, longer second harmonic distance from the passband and transmission zero point without increasing the manufacturing difficulty.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a dielectric body according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of a dielectric body according to another embodiment of the present application;

FIG. 3 is a schematic structural diagram of a dielectric body according to yet another embodiment of the present application;

FIG. 4 is a schematic front view of the dielectric body of FIG. 3;

fig. 5 is a schematic structural diagram of a dielectric filter (using the dielectric body in fig. 3) provided in an embodiment of the present application;

fig. 6 is a graph showing the amplitude-frequency characteristics of the dielectric filter of fig. 5.

Wherein, in the figures, the respective reference numerals:

100. a dielectric body; 10. a first dual-mode dielectric; 20. a first single-mode medium; 30. a first cross-coupled structure; 31. a first coupling medium; 32. a first coupling structure; 101. a first coupling part; 102. a first hole; 103. a second hole; 201. a first frequency adjustment aperture; 111. a first connection end; 112. a second connection end; 40. a second bimodal medium; 50. a second cross-coupled structure; 51. a second coupling medium; 52. a second coupling structure; 401. a second coupling part; 402. a third aperture; 403. a fourth aperture; 60. a second single-mode medium; 70. a coupling medium; 601. a second frequency adjustment aperture;

1000. a dielectric filter; 200. a metal layer.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

With the continuous development of wireless communication technology, wireless communication base stations are distributed more and more densely, and the requirements on the volume, the weight and the coverage area of the base stations are higher and higher, so that the miniaturization and the light weight of the filter are the future application trend.

In the creation process of the technical scheme, the inventor finds that the conventional dielectric waveguide filter is usually realized by adopting coaxial cavities, and each dielectric cavity corresponds to one frequency point, but the defect is large size. The dielectric dual-mode waveguide filter has two resonance modes, so that one dual-mode medium is equivalent to two single-mode media, the size and the weight of the filter can be greatly reduced, but the second harmonic of the dielectric dual-mode waveguide filter is close to a passband, and the second harmonic is inherent and cannot be eliminated, so that the performance of the filter is influenced. In addition, the dielectric waveguide filter and the dielectric dual-mode waveguide filter are difficult to realize transmission zero, so that the suppression performance of the filter is not ideal.

In order to solve the above problems, the inventor has tested a scheme of splicing and coupling two dual-mode dielectric resonators to realize a transmission zero point, but it has been found that not only is the second harmonic closer to the passband, but also when the two dual-mode dielectric resonators are spliced, matching coupling windows (for example, through holes) need to be respectively formed in metal layers of the two dual-mode dielectric resonators, and the two dual-mode dielectric resonators need to be accurately butted by welding or other connection methods, so that the manufacturing process is complicated, the accuracy requirement is high, otherwise, the performance of a final product is affected, and the consistency of the final product is poor due to the fact that the two separate dual-mode dielectric resonators need to be connected by splicing.

Based on this, in order to improve the technical problem that the dielectric filter in the related art is difficult to simultaneously realize the filter with a smaller size, a longer second harmonic distance from the passband and a transmission zero without increasing the manufacturing difficulty, the inventor proposes the following scheme.

Referring to fig. 1, an embodiment of the present invention provides a dielectric body 100 applied to a dielectric filter. The dielectric body 100 comprises a first dual mode dielectric 10, a first single mode dielectric 20 and a first cross-coupling structure 30, wherein:

the first dual-mode medium 10 is a dual-mode medium structure having two resonant modes, and the two resonant modes of the first dual-mode medium 10 may be two orthogonal resonant modes, for example, two orthogonal degenerate modes, but is not limited thereto. The first dual-mode medium 10 may be a medium structure having various shapes with two resonance modes, for example, a substantially square or rectangular parallelepiped shape, or a structure having other shapes, which is not limited herein.

The first single mode medium 20 is a single mode medium structure having one resonant mode.

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 for cross-coupling the first dual-mode medium 10 and the first single-mode medium 20. The first dual-mode medium 10 and the first single-mode medium 20 are cross-coupled, that is, two resonant modes of the first dual-mode medium 10 and two resonant modes of the first single-mode medium 20 are coupled with each other; that is, one of the resonant modes of the first dual mode medium 10 is coupled to the resonant mode of the first single mode medium 20, the other resonant mode of the first dual mode medium 10 is coupled to the resonant mode of the first single mode medium 20, and the two resonant modes of the first dual mode medium 10 are coupled to each other. Coupling is understood to be the transfer or exchange of electromagnetic energy between resonant modes. The first cross-coupling structure 30 may be any structure that can provide cross-coupling between the first dual-mode medium 10 and the first single-mode medium 20, and may include, for example, a block structure, a sheet structure, a plate structure, and the like, or may include a coupling groove, a coupling surface, and the like along with the block structure, the sheet structure, or the plate structure, but is not limited thereto.

The first dual-mode dielectric 10, the first single-mode dielectric 20, and the first cross-coupling structure 30 are an integrated structure, that is, 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 may be manufactured by integrally molding in various conventional manners for manufacturing a dielectric body of a dielectric filter, for example, the dielectric body 100 may be obtained by press-molding a dielectric material in a mold having a shape of the dielectric body 100 and then sintering the dielectric material, but is not limited thereto. The material of the dielectric body 100 may be any material that can be used for various existing dielectric filters, and is not limited herein.

In the dielectric body 100 provided in the embodiment of the present application, by providing the first dual-mode medium 10, the first single-mode medium 20, and the first cross-coupling structure 30, the first cross-coupling structure 30 is connected to the first dual-mode medium 10 and the first single-mode medium 20, and is configured to perform cross-coupling between the first dual-mode medium 10 and the first single-mode medium 20, so that two resonant modes of the first dual-mode medium 10 and a resonant mode of the first single-mode medium 20 can be coupled with each other two by two, which is beneficial to generating a transmission zero by using a dielectric filter of the dielectric body 100 provided in the embodiment of the present application, and further improving the out-of-band rejection performance of the dielectric filter; in addition, the first dual-mode dielectric 10 and the first single-mode dielectric 20 are cross-coupled, which not only reduces the size of the dielectric body 100 compared with a mode that each dielectric cavity corresponds to one frequency point, and is further beneficial to reducing the size of the dielectric filter using the dielectric body 100 provided in the embodiment of the present application, but also the first single-mode dielectric 20 can push away harmonics due to cross-coupling with the first dual-mode dielectric 10, which is beneficial to making the second harmonic of the dielectric filter using the dielectric body 100 provided in the embodiment of the present application far away from the passband, and improving the performance of the dielectric filter; meanwhile, by arranging the first dual-mode dielectric 10, the first single-mode dielectric 20 and the first cross-coupling structure 30 to be of an integrated structure, the dielectric body 100 can be manufactured in an integrated forming mode, the manufacturing difficulty is low, the consistency is good, and the stability and the reliability of the dielectric filter adopting the dielectric body 100 provided by the embodiment of the application are improved; in the method of splicing two dual-mode dielectric resonators in the original experiment of the inventor, since the coupling window needs to be formed on the metal layer of the dual-mode dielectric resonator, the dual-mode dielectric resonators are coupled through the coupling window, and the dual-mode dielectric resonators have high requirements on the shape of the coupling window, the two dual-mode dielectric resonators are difficult to manufacture through an integral forming mode.

As can be seen from the above, the dielectric body 100 provided in the embodiment of the present application can simultaneously realize the dielectric filter using the dielectric body 100 provided in the embodiment of the present application to have a smaller size, a longer second harmonic distance to the passband, and a transmission zero without increasing the manufacturing difficulty, and can effectively improve the performance of the dielectric filter.

In one embodiment, referring to fig. 1, the first cross-coupling structure 30 includes a first coupling medium 31 and a first coupling structure 32, and the first coupling medium 31 is connected to the first dual-mode medium 10 and the first single-mode medium 20, for coupling the first dual-mode medium 10 and the first single-mode medium 20. It is understood that the first coupling medium 31 is a medium structure for coupling the first dual-mode medium 10 and the first single-mode medium 20; the first coupling medium 31 may be a medium structure of various shapes such as a block structure, a stripe structure, a plate structure, etc., but is not limited thereto. Since the first cross-coupling structure 30 is integrated with the first dual-mode medium 10 and the first single-mode medium 20, the first coupling medium 31 is integrated 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 for coupling the first dual-mode medium 10 and the first single-mode medium 20. The first coupling structure 32 may be a coupling groove, a coupling chamfer, a coupling cut, a coupling hole, etc., but is not limited thereto.

So configured, since the first cross-coupling structure 30 includes the first coupling medium 31 connected to the first dual-mode medium 10 and the first single-mode medium 20, and a first coupling structure 32 disposed on the first dual mode medium 10 or the first single mode medium 20, one of the resonant modes of the first dual mode medium 10 can thus be coupled to the resonant mode of the first single mode medium 20 via the first coupling medium 31, 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, thereby facilitating the coupling of the two resonant modes of the first dual-mode medium 10 with the resonant modes of the first single-mode medium 20 through a coupling channel, the cross-coupling effect can be improved, and the dielectric filter of the dielectric body 100 provided by the embodiment of the application is more favorable for generating transmission zero at one side of the passband.

It is understood that the number of the first coupling mediums 31 may be one or more, and the number of the first coupling structures 32 may be one or more, and may be specifically set according to actual needs, and is not limited herein.

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

Optionally, in some other embodiments, the first cross-coupling structure 30 may not have 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 with the resonant modes of the first single-mode medium 20 through the first coupling medium 31, that is, both resonant modes of the first dual-mode medium 10 may be coupled with the resonant modes of the first single-mode medium 20 through the same coupling channel.

Optionally, in some other embodiments, the first cross-coupling structure 30 may also have no 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 with the resonant modes of the first single-mode medium 20 through the first coupling structure 32. In this case, the first dual-mode dielectric 10 and the first single-mode dielectric 20 may be directly connected.

Alternatively, in one embodiment, referring to fig. 1, the first coupling structure 32 is a coupling slot.

With this arrangement, since the first coupling structure 32 is a coupling groove, it is only required to directly open the first dual-mode dielectric 10 or the first single-mode dielectric 20, which is beneficial to manufacturing. Furthermore, by changing the volume of the first dual-mode medium 10 or the first single-mode medium 20 occupied by the coupling slot, 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 changed (the coupling strength can also be understood as the coupling amount or the coupling magnitude). 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 may be changed by changing at least one of the length, width and depth of the coupling groove, and it is more favorable for one of the resonant modes of the first dual mode medium 10 to be coupled with the resonant mode of the first single mode medium 20 through the coupling groove.

It should be noted that the structure of the first coupling structure 32 is not limited thereto. Alternatively, in some other embodiments, the first coupling structure 32 may also be a corner cut structure, a side cut structure, a hole structure, etc., for example, the corner cut structure or the side cut structure may be provided at the corner or edge of the first dual mode medium 10 or the first single mode medium 20.

In one embodiment, referring to fig. 1, the first coupling structure 32 is opened on the first dual-mode dielectric 10 near the first single-mode dielectric 20. The first coupling structure 32 is located on one side of the first coupling medium 31. Optionally, the first coupling structure 32 may be adjacent to the first coupling medium 31.

With this arrangement, since the first coupling structure 32 is disposed on the first dual-mode medium 10 close to one side of the first single-mode medium 20 and located on one side of the first coupling medium 31, the distance between the first coupling structure 32 and the first coupling medium 31 is relatively short, which is beneficial for coupling two resonant modes of the first dual-mode medium 10 with the resonant modes of the first single-mode medium 20 through the first coupling structure 32 and the first coupling medium 31, respectively, and thus the cross-coupling effect can be improved.

Of course, the positional arrangement of the first coupling structure 32 is not limited thereto. Alternatively, in some other embodiments, the first coupling structure 32 may have a certain distance from the first coupling medium 31, as long as one of the resonant modes of the first dual-mode medium 10 can be coupled with the resonant mode of the first single-mode medium 20 through the first coupling structure 32.

Alternatively, the first coupling structure 32 may be disposed on a side of the first dual-mode medium 10 (i.e. a side edge of the first dual-mode medium 10), which is more favorable for coupling the first dual-mode medium 10 with the first single-mode medium 20. Moreover, compared with the first coupling structure 32 disposed near the inner side, the first coupling structure 32 disposed at the side of the first dual-mode dielectric 10 is more favorable for processing and forming, has less influence on the structural strength of the first dual-mode dielectric 10, is not easily damaged when being subjected to an external force, and has higher reliability.

In one embodiment, referring to fig. 1, a first coupling portion 101 is disposed on the first dual-mode dielectric 10 for coupling two resonant modes of the first dual-mode dielectric 10. It is understood that the first coupling portion 101 may be various structures for coupling two resonant modes of the first dual-mode dielectric 10, such as, but not limited to, a coupling slot, a coupling chamfer, a coupling cut edge, a coupling hole, and the like. It is understood that the number of the first coupling parts 101 may be one or more, and may be set according to actual needs, and is not limited herein.

With such an arrangement, since the first coupling portion 101 for coupling the two resonant modes of the first dual-mode medium 10 is disposed on the first dual-mode medium 10, not only the coupling between the two resonant modes of the first dual-mode medium 10 is facilitated, but also the electric field directions of the two resonant modes of the first dual-mode medium 10 can be changed by changing the position of the first coupling portion 101 on the first dual-mode medium 10, so as to facilitate changing the coupling polarity between the two resonant modes of the first dual-mode medium 10 (i.e., the positive coupling or the negative coupling between the two resonant modes of the first dual-mode medium 10, the positive coupling is positive coupling, and the negative coupling is negative coupling), and further facilitate changing the position of the transmission zero point (even if the transmission zero point is on the left side or the right side of the passband of the dielectric filter), so as to control the position of the transmission zero point.

Alternatively, the first coupling portion 101 may be disposed at a side of the first dual-mode medium 10 (i.e. a side edge of the first dual-mode medium 10), so as to facilitate the coupling of the two resonant modes of the first dual-mode medium 10.

Alternatively, referring to fig. 1, the first coupling portion 101 may be a coupling groove disposed at an edge or a corner of the first dual-mode medium 10, which is not only convenient for manufacturing, but also can change the coupling strength between two resonant modes of the first dual-mode medium 10 by changing the volume of the first dual-mode medium 10 occupied by the coupling groove. For example, the coupling coefficient between the two resonant modes of the first dual-mode medium 10 can be changed by changing at least one of the length, width and depth of the coupling slot to change the coupling strength (the coupling strength can also be understood as the coupling amount or coupling magnitude) between the two resonant modes of the first dual-mode medium 10.

In an embodiment, referring to fig. 1, a first hole 102 and a second hole 103 are formed in a first dual-mode medium 10, where 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, the first hole 102 and the second hole 103 may be located on two adjacent sides of the first dual-mode medium 10, respectively; of course, when the first dual-mode medium 10 is in an irregular structure, the first hole 102 and the second hole 103 may also be located on two opposite sides of the first dual-mode medium 10, for example, the peripheral side of the first dual-mode medium 10 has an arc surface or five or more planes, but not limited thereto), the first hole 102 is used to adjust a resonant frequency of one resonant mode of the first dual-mode medium 10, and the second hole 103 is used to adjust a resonant frequency of another resonant mode of the first dual-mode medium 10. It is understood that the number of the first holes 102 may be one or more, and the number of the second holes 103 may also be one or more, and may be set according to actual needs, and is not limited herein.

With this arrangement, the first hole 102 and the second hole 103 can adjust the resonance frequencies of the two resonance modes of the first dual-mode medium 10, respectively.

Alternatively, referring to fig. 1, the first hole 102 and the second hole 103 may be circular holes; of course, the first hole 102 and the second hole 103 may also be polygonal holes, but are not limited thereto, and may also be other holes with regular or irregular shapes.

Alternatively, in one embodiment, referring to fig. 1, the first dual-mode dielectric 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.

Alternatively, referring to fig. 1, the first hole 102 and the second hole 103 may be blind holes.

In one embodiment, referring to fig. 1, a first frequency adjusting hole 201 is formed on the first single-mode medium 20, so as to adjust a resonant frequency of a resonant mode of the first single-mode medium 20. Alternatively, the first frequency adjusting hole 201 may be opened on any one surface of the first single-mode medium 20 as long as the position of the resonance frequency of the resonance mode of the first single-mode medium 20 can be adjusted.

Alternatively, referring to fig. 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 holes with regular or irregular shapes.

Alternatively, in one embodiment, referring to fig. 1, the depth of the first frequency adjustment hole 201 may be greater than or equal to a 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-adjusting hole 201.

So set up, because the degree of depth of first frequency adjustment hole 201 is greater than or equal to the fourth of the degree of depth of first single mode medium 20, can effectual remote harmonic, make the second harmonic of the dielectric filter that adopts dielectric body 100 that this application embodiment provided apart from the passband far away, do benefit to improving dielectric filter's performance.

The depth of the first frequency adjustment hole 201 is not limited to this, and may be another depth capable of adjusting the resonance frequency of the resonance mode of the first single-mode medium 20.

Alternatively, referring to fig. 1, the first frequency adjustment hole 201 may be disposed laterally, for example, the axial direction of the first frequency adjustment hole 201 may be perpendicular to the height direction of the first single-mode medium 20, which is more favorable for adjusting the resonant frequency of the resonant mode of the first single-mode medium 20.

Of course, in other embodiments, the first frequency adjustment hole 201 may be disposed longitudinally, for example, the axial direction of the first frequency adjustment hole 201 may be parallel to the height direction of the first single-mode medium 20. In other embodiments, the first frequency adjustment aperture 201 may be disposed in any other direction.

In one embodiment, referring to fig. 1, a first connection end 111 is disposed on the first dual-mode dielectric 10, and a second connection end 112 is disposed on the first single-mode dielectric 20. 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. Alternatively, the first connection end 111 may be a hole structure opened on the first dual-mold medium 10; of course, in other embodiments, the first connection end 111 may also be a protruding structure. Alternatively, the second connection end 112 may be a hole structure opened on the first single-mode medium 20; of course, in other embodiments, the second connection end 112 may also be a protruding structure.

So configured, it is convenient for signals to be input from one of the first connection end 111 and the second connection end 112 and to be output from the other of the first connection end 111 and the second connection end 112 after passing through the dielectric body 100.

In other embodiments, the first connection end 111 may not be disposed on the first dual-mode medium 10, and the second connection end 112 may not be disposed 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 mediums (when the first dual-mode medium 10 is connected to other single-mode or multi-mode mediums, the first dual-mode medium 10 and the other single-mode or multi-mode mediums may be in an integrated structure or a split structure, so as to facilitate signal conduction between the first dual-mode medium 10 and the other single-mode or multi-mode mediums; the first single-mode medium 20 may also be connected to another single-mode or multi-mode medium (when the first single-mode medium 20 is connected to another single-mode or multi-mode medium, the first single-mode medium 20 and the other single-mode or multi-mode medium may be connected in an integrated structure or a separate structure), so as to facilitate signal conduction between the first single-mode medium 20 and the other single-mode or multi-mode medium.

In another embodiment, referring to fig. 2, the dielectric body 100 further includes a second dual-mode dielectric 40 and a second cross-coupling structure 50, wherein:

the second dual-mode medium 40 is a dual-mode medium structure having two resonant modes, and the two resonant modes of the second dual-mode medium 40 may be two orthogonal resonant modes, such as two orthogonal degenerate modes, but not limited thereto. The second dual-mode medium 40 may be a medium structure having various shapes with two resonance modes, for example, a substantially square or rectangular parallelepiped shape, or a structure having other shapes, which is not limited herein. It is understood that the structure of the second bimodal medium 40 may or may not be the same as the structure of the first bimodal medium 10.

The second cross-coupling structure 50 is connected to the second dual-mode medium 40 and the first single-mode medium 20, and is used for cross-coupling the second dual-mode medium 40 with the first single-mode medium 20. The second dual-mode medium 40 is cross-coupled with the first single-mode medium 20, that is, two resonant modes of the second dual-mode medium 40 are coupled with the resonant mode of the first single-mode medium 20, that is, one resonant mode of the second dual-mode medium 40 is coupled with the resonant mode of the first single-mode medium 20, the other resonant mode of the second dual-mode medium 40 is coupled with the resonant mode of the first single-mode medium 20, and the two resonant modes of the second dual-mode medium 40 are also coupled with each other. The second cross-coupling structure 50 may be any structure that can allow the second dual-mode medium 40 to cross-couple with the first single-mode medium 20, and may include, for example, a block structure, a sheet structure, a plate structure, and the like, or may include a coupling groove, a coupling surface, and the like along with the block structure, the sheet structure, or the plate structure, but is not limited thereto. It is understood that the structure of the second cross-coupling structure 50 may or may not be the same as the structure of the first cross-coupling structure 30.

With such an arrangement, since the second dual-mode medium 40 is connected to the first single-mode medium 20 through the second cross-coupling structure 50 and cross-coupled with the first single-mode medium 20, not only can two resonance modes of the first dual-mode medium 10 and the resonance mode of the first single-mode medium 20 be coupled with each other pairwise, but also two resonance modes of the second dual-mode medium 40 and the resonance mode of the first single-mode medium 20 can be coupled with each other pairwise, which is beneficial for generating two transmission zeros by using the dielectric filter of the dielectric body 100 provided in the embodiment of the present application, and can further improve the out-of-band rejection performance of the dielectric filter. Moreover, the dielectric body 100 formed by matching the two dual-mode media with the single-mode medium has better suppression performance under the condition of smaller volume, and is beneficial to improving the performance of the dielectric filter adopting the dielectric body 100 provided by the embodiment of the application.

Optionally, in an embodiment, referring to fig. 2, the first dual-mode dielectric 10, the first single-mode dielectric 20, the first cross-coupling structure 30, the second dual-mode dielectric 40, and the second cross-coupling structure 50 are an integrated structure.

So set up, can make the dielectric body 100 through integrated into one piece's mode, the production manufacturing difficulty is lower, and the uniformity is better, does benefit to the stability and the reliability that improve the dielectric filter who adopts the dielectric body 100 that this application embodiment provided. The dielectric filter using the dielectric body 100 provided by the embodiment of the present application can simultaneously realize a smaller size, a longer second harmonic distance from the passband, and two transmission zeros without increasing the manufacturing difficulty, and can further improve the performance of the dielectric filter.

It should be noted that in other embodiments, the second cross-coupling structure 50 and the first single-mode medium 20 may also be connected by splicing.

Optionally, in an embodiment, referring to fig. 2, the second cross-coupling structure 50 includes a second coupling medium 51 and a second coupling structure 52, and the second coupling medium 51 is connected to the second dual-mode medium 40 and the first single-mode medium 20, and is used for coupling the second dual-mode medium 40 and 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 for coupling the second dual-mode medium 40 with the first single-mode medium 20. It is understood that the second coupling medium 51 is a medium structure for coupling the second coupling medium 51 with the first single-mode medium 20; the second coupling medium 51 may be a medium structure of various shapes such as a block structure, a stripe structure, a sheet structure, etc., but is not limited thereto. The second coupling structure 52 is disposed on the second dual-mode medium 40 or the first single-mode medium 20, and is used for coupling the second dual-mode medium 40 with the first single-mode medium 20. The second coupling structure 52 may be a coupling groove, a coupling chamfer, a coupling cut, a coupling hole, etc., but is not limited thereto.

With such an arrangement, one of the resonant modes of the second dual-mode medium 40 can be coupled with 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 with the resonant mode of the first single-mode medium 20 through the second coupling structure 52, so that the two resonant modes of the second dual-mode medium 40 are coupled with the resonant mode of the first single-mode medium 20 through a coupling channel, respectively, the cross-coupling effect can be improved, and a transmission zero point is generated on one side of a passband by using the dielectric filter of the dielectric body 100 provided in the embodiment of the present application.

It will be appreciated that the structure of the second coupling medium 51 may or may not be the same as the structure of the first coupling medium 31. The structure of the second coupling structure 52 may or may not be the same as the structure of the first coupling structure 32.

It is understood that when the second cross-coupling structure 50, the second dual-mode medium 40 and the first single-mode medium 20 are an integral structure, the second coupling medium 51, the second dual-mode medium 40 and the first single-mode medium 20 are also an integral structure.

It should be noted that the structure of the second cross-coupling structure 50 is not limited thereto. Alternatively, in some other embodiments, the second cross-coupling structure 50 may not have 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 with the resonant mode of the first single-mode medium 20 through the second coupling medium 51, that is, both resonant modes of the second dual-mode medium 40 may be coupled with the resonant mode of the first single-mode medium 20 through the same coupling channel.

Alternatively, in one embodiment, referring to fig. 2, the second coupling structure 52 is a coupling slot.

With such an arrangement, since the second coupling structure 52 is a coupling slot, it is only required to directly open the second dual-mode medium 40 or the first single-mode medium 20, which is beneficial to manufacturing. Furthermore, by changing the volume of the second dual-mode medium 40 or the first single-mode medium 20 occupied by the coupling slot, 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 changed (the coupling strength can also be understood as the coupling amount or the coupling magnitude). 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 changed by changing at least one of the length, width and depth of the coupling slot, which is more advantageous for coupling one of the resonant modes of the second dual-mode medium 40 with the resonant mode of the first single-mode medium 20 through the coupling slot.

It should be noted that the structure of the second coupling structure 52 is not limited thereto. Alternatively, in some other embodiments, the second coupling structure 52 may also be a corner cut structure, a side cut structure, a hole structure, etc., for example, a corner cut structure or a side cut structure may be provided at the corner or edge of the second dual mode medium 40 or the first single mode medium 20.

Alternatively, in one embodiment, referring to fig. 2, the second coupling structure 52 opens on the second dual-mode medium 40 near the side of 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.

With such an arrangement, since the second coupling structure 52 is opened on the second dual-mode medium 40 close to one side of the first single-mode medium 20 and located on one side of the second coupling medium 51, the distance between the second coupling structure 52 and the second coupling medium 51 is relatively short, which is beneficial for coupling the two resonant modes of the second dual-mode medium 40 with the resonant modes of the first single-mode medium 20 through the second coupling structure 52 and the second coupling medium 51, respectively, and can improve the cross-coupling effect.

Of course, the positional arrangement of the second coupling structure 52 is not limited thereto. Alternatively, in some other embodiments, the second coupling structure 52 may have a certain distance from the second coupling medium 51, as long as one of the resonant modes of the second dual-mode medium 40 can be coupled with the resonant mode of the first single-mode medium 20 through the second coupling structure 52.

Optionally, in an embodiment, referring to fig. 2, a second coupling portion 401 is disposed on the second dual-mode medium 40 for coupling two resonant modes of the second dual-mode medium 40. It is understood that the second coupling portion 401 may be various structures for coupling two resonant modes of the second dual-mode medium 40, such as, but not limited to, a coupling slot, a coupling chamfer, a coupling cut edge, a coupling hole, etc. It is understood that the number of the second coupling parts 401 may be one or more, and may be set according to actual needs, and is not limited thereto.

With such an arrangement, since the second coupling portion 401 for coupling the two resonant modes of the second dual-mode medium 40 is disposed on the second dual-mode medium 40, not only is coupling between the two resonant modes of the second dual-mode medium 40 facilitated, but also by changing the position of the second coupling portion 401 on the second dual-mode medium 40, the direction of the electric field of the two resonant modes of the second dual-mode medium 40 can be changed, so as to facilitate changing the coupling polarity between the two resonant modes of the second dual-mode medium 40 (i.e., positive coupling or negative coupling is used between the two resonant modes of the second dual-mode medium 40, the positive coupling polarity is positive coupling, and the negative coupling polarity is negative coupling), so as to facilitate changing the position of the transmission zero point, and facilitate controlling the position of the transmission zero point.

Alternatively, the second coupling portion 401 may be disposed at a side of the second dual-mode medium 40 (i.e. a side of the second dual-mode medium 40), so as to facilitate the coupling of the two resonant modes of the second dual-mode medium 40.

Alternatively, referring to fig. 2, the second coupling portion 401 may be a coupling slot disposed at an edge or corner of the second dual-mode medium 40, which is not only convenient for manufacturing, but also can change the coupling strength between two resonant modes of the second dual-mode medium 40 by changing the volume of the second dual-mode medium 40 occupied by the coupling slot. For example, the coupling coefficient between the two resonant modes of the second dual-mode medium 40 can be changed by changing at least one of the length, width and depth of the coupling slot to change the coupling strength (the coupling strength can also be understood as the coupling amount or coupling magnitude) between the two resonant modes of the second dual-mode medium 40.

In an embodiment, referring to fig. 2, a third hole 402 and a fourth hole 403 are formed in the second dual-mode medium 40, 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, the third hole 402 and the fourth hole 403 may be located on two adjacent sides or two opposite sides of the second dual-mode medium 40, respectively), the third hole 402 is used to adjust a resonant frequency of one resonant mode of the second dual-mode medium 40, and the fourth hole 403 is used to adjust a resonant frequency of the other resonant mode of the second dual-mode medium 40. It is understood that the number of the third holes 402 may be one or more, and the number of the fourth holes 403 may also be one or more, and may be set according to actual needs, and is not limited herein.

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

Alternatively, referring to fig. 2, the third hole 402 and the fourth hole 403 may be circular holes; of course, the third hole 402 and the fourth hole 403 may also be polygonal holes, but are not limited thereto, and may also be other holes with regular or irregular shapes.

Alternatively, in one embodiment, referring to fig. 2, the second dual mold medium 40 has a third outer surface and a fourth outer surface adjacent to each other, 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 may both be blind holes.

Optionally, in an embodiment, referring to fig. 2, a first coupling portion 101 is disposed on the first dual-mode dielectric 10 for coupling two resonant modes of the first dual-mode dielectric 10. The second dual-mode medium 40 is provided with a second coupling portion 401 for coupling two resonant modes of the second dual-mode medium 40. Wherein the polarity of coupling between the two resonant modes of the first dual-mode medium 10 is opposite to the polarity of coupling between the two resonant modes of the second dual-mode medium 40; for example, there may be positive coupling between the two resonant modes of the first dual-mode medium 10, and negative coupling between the two resonant modes of the second dual-mode medium 40; alternatively, there may be negative coupling between the two resonant modes of the first dual-mode medium 10 and positive coupling between the two resonant modes of the second dual-mode medium 40. Alternatively, referring to fig. 2, the first coupling portion 101 and the second coupling portion 401 may be respectively 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.

With such an arrangement, since the first coupling portion 101 for coupling the two resonant modes of the first dual-mode medium 10 is disposed on the first dual-mode medium 10, the second coupling portion 401 for coupling the two resonant modes of the second dual-mode medium 40 is disposed on 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, two transmission zeros may be respectively generated at two sides of the passband of the dielectric filter using the dielectric body 100 provided in the embodiment of the present application, which may effectively improve the out-of-band rejection performance of the dielectric filter.

Optionally, in an embodiment, referring to fig. 2, a first connecting end 111 is disposed on the first dual-mode medium 10, and a second connecting end 112 is disposed on the second dual-mode medium 40. One of the first connection end 111 and the second connection end 112 is an input end, and the other is an output end. The structure of the first connection end 111 may be the structure of the first connection end 111 in the above embodiment, and the second connection end 112 may be the structure of the second connection end 112 in the above embodiment, and in this embodiment, only the arrangement position of the second connection end 112 is different, which is not described herein again.

In another embodiment, referring to fig. 3 and 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 medium 70 is connected to the first single-mode medium 20 and the second single-mode medium 60, and is used for coupling the first single-mode medium 20 and the second single-mode medium 60. The coupling medium 70 may be a medium structure for coupling the first single-mode medium 20 and the second single-mode medium 60, and may be a structure having various shapes, such as a block structure, a plate structure, or a sheet structure, but is not limited thereto. The second single-mode medium 60 is a single-mode medium structure having one resonance mode, and the structure of the second single-mode medium 60 may be the same as or different from that of the first single-mode medium 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 configured to allow the second dual-mode medium 40 and the second single-mode medium 60 to be cross-coupled, that is, two resonant modes of the second dual-mode medium 40 and two resonant modes of the second single-mode medium 60 are coupled to each other; that is, one of the resonant modes 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 to each other.

It is understood that the structures of the second dual mode medium 40 and the second cross-coupling structure 50 may be the same as the structures of the second dual mode medium 40 and the second cross-coupling structure 50 in the above embodiments, respectively, and in this embodiment, only the second cross-coupling structure 50 is connected to the second single mode medium 60 and the second dual mode medium 40, which is different from the connection of the second cross-coupling structure 50 to the first single mode medium 20 and the second dual mode medium 40 in the above embodiments, that is, only the second single mode medium 60 is disposed between the second dual mode medium 40 and the first single mode medium 20.

With such an arrangement, since the second dual-mode medium 40 is connected to the second single-mode medium 60 through the second cross-coupling structure 50 and is cross-coupled with the second single-mode medium 60, and the second single-mode medium 60 is coupled with the first single-mode medium 20 through the coupling medium 70, while the two resonant modes of the first dual-mode medium 10 and the resonant mode of the first single-mode medium 20 can be coupled with each other two by two, the two resonant modes of the second dual-mode medium 40 and the resonant mode of the second single-mode medium 60 can also be coupled with each other two by two, which is beneficial for generating two transmission zeros by using the dielectric filter of the dielectric body 100 provided in the embodiment of the present application, and can further improve the out-of-band rejection performance of the dielectric filter. Moreover, the dielectric body 100 formed by matching the two dual-mode media with the two single-mode media has better suppression performance under the condition of smaller volume, and can further push away harmonic waves, so that the second harmonic waves are far away from the passband, and the performance of the dielectric filter adopting the dielectric body 100 provided by the embodiment of the application is further improved.

Alternatively, in one embodiment, referring to fig. 3 and 4, the first single-mode medium 20, the second single-mode medium 60, and the coupling medium 70 are a unitary structure. The second single-mode medium 60, the second dual-mode medium 40, and the second cross-coupling structure 50 are a unitary structure. That is, 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.

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.

In 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.

In other embodiments, 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; meanwhile, the coupling medium 70 is connected with the first single-mode medium 20 in a splicing manner, or the coupling medium 70 is connected with the second single-mode medium 60 in a splicing manner.

Optionally, in an embodiment, referring to fig. 3 and fig. 4, the second cross-coupling structure 50 includes a second coupling medium 51 and a second coupling structure 52, where the second coupling medium 51 is connected to the second dual-mode medium 40 and the second single-mode medium 60, and is used for coupling 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, and is used for coupling the second dual-mode medium 40 and the second single-mode medium 60. It is understood that the structures of the second coupling medium 51 and the second coupling structure 52 in this embodiment are the same as the structures of the second coupling medium 51 and the second coupling structure 52 in the above embodiments, and are not described again here.

With such an arrangement, one of the resonant modes of the second dual-mode medium 40 can be coupled with 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 with the resonant mode of the second single-mode medium 60 through the second coupling structure 52, so that the two resonant modes of the second dual-mode medium 40 are coupled with the resonant mode of the second single-mode medium 60 through a coupling channel, respectively, the cross-coupling effect can be improved, and a transmission zero point is generated on one side of a passband by using the dielectric filter of the dielectric body 100 provided in the embodiment of the present application.

Alternatively, in one embodiment, referring to fig. 3, the second coupling structure 52 may be a coupling slot.

With such an arrangement, since the second coupling structure 52 is a coupling slot, it is only required to directly open the second dual-mode medium 40 or the second single-mode medium 60, which is beneficial to manufacturing. Furthermore, by changing the volume of the second dual-mode medium 40 or the second single-mode medium 60 occupied by the coupling slot, the coupling strength between one of the resonant modes of the second dual-mode medium 40 and the resonant mode of the second single-mode medium 60 can be changed (the coupling strength can also be understood as the coupling amount or the coupling magnitude). For example, the coupling strength between one of the resonant modes of the second dual-mode medium 40 and the resonant mode of the second single-mode medium 60 can be changed by changing at least one of the length, width and depth of the coupling slot, which is more advantageous for coupling one of the resonant modes of the second dual-mode medium 40 with the resonant mode of the second single-mode medium 60 through the coupling slot.

Alternatively, in one embodiment, referring to fig. 3, the second coupling structure 52 may be opened on the second dual-mode medium 40 near the side of the second single-mode medium 60; the second coupling structure 52 may be located at one side of the second coupling medium 51.

With such an arrangement, since the second coupling structure 52 is disposed on the second dual-mode medium 40 close to one side of the second single-mode medium 60 and located on one side of the second coupling medium 51, the distance between the second coupling structure 52 and the second coupling medium 51 is relatively short, which is beneficial for coupling two resonant modes of the second dual-mode medium 40 with the resonant modes of the second single-mode medium 60 through the second coupling structure 52 and the second coupling medium 51, respectively, and can improve the cross-coupling effect.

Optionally, in an embodiment, referring to fig. 3, a second coupling portion 401 is disposed on the second dual-mode medium 40 for coupling two resonant modes of the second dual-mode medium 40. It is understood that the structure of the second coupling portion 401 may be the same as the structure of the second coupling portion 401 in the above embodiments, and the description thereof is omitted.

Optionally, in an embodiment, referring to fig. 3, a third hole 402 and a fourth hole 403 are formed in the second dual-mode medium 40, 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, may be located on two adjacent sides or two opposite sides of the second dual-mode medium 40, respectively), the third hole 402 is used to adjust a resonant frequency of one resonant mode of the second dual-mode medium 40, and the fourth hole 403 is used to adjust a resonant frequency of another resonant mode of the second dual-mode medium 40. It is understood that the number of the third holes 402 may be one or more, and the number of the fourth holes 403 may also be one or more, and may be set according to actual needs, and is not limited herein.

Optionally, in an embodiment, referring to fig. 3 and fig. 4, a second frequency adjusting hole 601 is formed in the second single-mode medium 60, so as to adjust the resonant frequency of the resonant mode of the second single-mode medium 60. Alternatively, the second frequency adjusting hole 601 may be opened on any one surface of the second single-mode medium 60 as long as the position of the resonance frequency of the resonance mode of the second single-mode medium 60 can be adjusted.

Alternatively, referring to fig. 3, the second frequency adjustment hole 601 may be a blind hole. Alternatively, referring to fig. 3, the second frequency adjustment hole 601 may be a circular hole; of course, the second frequency adjustment hole 601 may be a polygonal hole, but is not limited thereto, and may be other holes having a regular or irregular shape.

Alternatively, in one embodiment, the depth of the second frequency-adjusting 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-adjusting hole 601.

With such an arrangement, 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 harmonic can be effectively removed, so that the second harmonic of the dielectric filter using the dielectric body 100 provided by the embodiment of the present application is further away from the passband, which is beneficial to improving the performance of the dielectric filter.

The depth of the second frequency adjustment hole 601 is not limited to this, and may be another depth capable of adjusting the resonance frequency of the resonance mode of the second single-mode medium 60.

Alternatively, referring to fig. 3, the second frequency adjustment hole 601 may be disposed laterally, for example, the axial direction of the second frequency adjustment hole 601 may be perpendicular to the height direction of the second single-mode medium 60, which is more favorable for adjusting the resonant frequency of the resonant mode of the second single-mode medium 60.

Of course, in other embodiments, the second frequency adjustment hole 601 may be disposed longitudinally, for example, the axial direction of the second frequency adjustment hole 601 may be parallel to the height direction of the second single-mode medium 60. In other embodiments, the second frequency adjustment aperture 601 may be disposed in any other direction.

Optionally, in an embodiment, referring to fig. 3 and fig. 4, a first coupling portion 101 is disposed on the first dual-mode dielectric 10 for coupling two resonant modes of the first dual-mode dielectric 10. The second dual-mode medium 40 is provided with a second coupling portion 401 for coupling two resonant modes of the second dual-mode medium 40. Wherein the polarity of the coupling between the two resonant modes of the first dual-mode medium 10 is opposite to the polarity of the coupling between the two resonant modes of the second dual-mode medium 40. Alternatively, the first coupling portion 101 and the second coupling portion 401 may be respectively 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.

With such a configuration, two transmission zeros are respectively generated at two sides of the passband of the dielectric filter using the dielectric body 100 provided by the embodiment of the present application, and the out-of-band rejection performance of the dielectric filter can be effectively improved.

Optionally, in an embodiment, referring to fig. 3, a first connecting end 111 is disposed on the first dual-mode medium 10, and a second connecting end 112 is disposed on the second dual-mode medium 40; one of the first connection end 111 and the second connection end 112 is an input end, and the other is an output end. The structure of the first connection end 111 may be the structure of the first connection end 111 in the above embodiment, and the second connection end 112 may be the structure of the second connection end 112 in the above embodiment, in this embodiment, only the arrangement position of the second connection end 112 is different, which is not described herein again.

In the above embodiment, the case where the first dual-mode medium 10 is cross-coupled to the first single-mode medium 20, the case where the first dual-mode medium 10 and the second dual-mode medium 40 are simultaneously cross-coupled to the first single-mode medium 20, and the case where the first dual-mode medium 10 and the second dual-mode medium 40 are cross-coupled to the first single-mode medium 20 and the second single-mode medium 60, respectively, have been described, but the present invention is not limited to the above combination. In addition to the case where one or two single-mode mediums are provided between the first dual-mode medium 10 and the second dual-mode medium 40, three or more single-mode mediums may be provided, and one or more multi-mode mediums may be provided.

Referring to fig. 3 and 5, an embodiment of the present invention further provides a dielectric filter 1000, where the dielectric filter 1000 includes a metal layer 200 and the dielectric body 100 of any of the above embodiments, and the metal layer 200 covers an outer surface of the dielectric body 100 to protect the dielectric body 100, so as to prevent internal signal leakage and external interference. It is understood that the metal layer 200 may be formed by various existing methods of providing a metal layer on the outer surface of the dielectric body, or the metal layer 200 may be formed by modifying the existing method of providing a metal layer on the outer surface of the dielectric body. Alternatively, the metal layer 200 may be made of various metal materials, and may be a single metal material, for example, the metal layer 200 may be a silver layer; metal materials can also be compounded, for example, the metal layer 200 can be a copper/nickel composite layer, a copper/aluminum composite layer, and the like; the material of the metal layer 200 is not limited herein.

Since the dielectric filter 1000 provided in the embodiment of the present application employs the above-mentioned dielectric body 100, the dielectric filter 1000 also has the technical effects brought by the technical solutions of the dielectric bodies 100 of any of the above-mentioned embodiments, and can simultaneously realize the dielectric filter 1000 having a smaller size, a longer second harmonic distance passband, and a transmission zero without increasing the manufacturing difficulty, and can effectively improve the performance of the dielectric filter 1000.

Referring to fig. 6, by way of example, an amplitude-frequency characteristic graph (i.e., an S-parameter characteristic simulation graph) of the dielectric filter 1000 is obtained by simulating the dielectric filter 1000 shown in fig. 5, and it can be seen from fig. 6 that transmission zeros are generated on both left (or low) and right (or high) sides of the passband of the dielectric filter 1000, and the second harmonic is far from the passband, so that the dielectric filter 1000 has a good out-of-band rejection performance.

It is to be understood that the foregoing description mainly illustrates the innovation of the dielectric filter 1000 provided in the embodiment of the present application, and the dielectric filter 1000 provided in the embodiment of the present application may also have other elements besides the above elements, and the other elements may be elements of existing dielectric filters, which are well known to those skilled in the art and will not be described herein.

In addition, the shapes of the elements such as the dielectric body 100 and the metal layer 200 shown in the drawings are merely illustrative and are not limited to the shapes shown in the drawings.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims

1. A dielectric body, comprising:

a first dual-mode dielectric;

a first single-mode medium; and

a first cross-coupling structure connected to the first dual-mode medium and the first single-mode medium, for cross-coupling the first dual-mode medium with the first single-mode medium;

wherein the first dual-mode medium, the first single-mode medium, and the first cross-coupling structure are an integral structure.

2. The dielectric body of claim 1, wherein the first cross-coupling structure comprises:

a first coupling medium connected to the first dual-mode medium and the first single-mode medium, for coupling the first dual-mode medium with the first single-mode medium; and

a first coupling structure disposed on the first dual-mode medium or the first single-mode medium for coupling the first dual-mode medium with the first single-mode medium.

3. The dielectric body of claim 2, wherein: the first coupling structure is a coupling slot.

4. A dielectric body as recited in claim 3, wherein: the first coupling structure is arranged on one side, close to the first single-mode medium, of the first double-mode medium; the first coupling structure is located on one side of the first coupling medium.

5. The dielectric body of claim 1, wherein: the first dual-mode medium is of a cubic structure; and/or

The first single-mode medium is of a cuboid structure; and/or

The first double-mode medium is provided with a first coupling part for coupling two resonance modes of the first double-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 positioned on the same side of the first dual-mode medium, the first hole is used for adjusting the resonance frequency of one resonance mode of the first dual-mode medium, and the second hole is used for adjusting the resonance frequency of the other resonance mode of the first dual-mode medium; and/or

A first frequency adjusting hole is formed in the first single-mode medium; and/or

A first connecting end is arranged on the first dual-mode medium, and a second connecting end is arranged on the first single-mode medium; one of the first connection end and the second connection end is an input end, and the other one of the first connection end and the second connection end is an output end.

6. The dielectric body of any one of claims 1 to 5, comprising:

a second bimodal medium; and

a second cross-coupling structure connected to the second dual-mode medium and the first single-mode medium for cross-coupling the second dual-mode medium with the first single-mode medium.

7. The dielectric body of claim 6, 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 integral structure; and/or

The second double-mode medium is of a cubic structure; and/or

The second cross-coupling structure comprises:

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 disposed on the second dual-mode medium or the first single-mode medium for coupling the second dual-mode medium with the first single-mode medium;

the second coupling structure is a coupling groove; the second coupling structure is arranged on one side, close to the first single-mode medium, of the second double-mode medium; the second coupling structure is positioned on one side of the second coupling medium; and/or

The second dual-mode medium is provided with a second coupling part for coupling two resonance modes of the second dual-mode medium; and/or

The second dual-mode medium is provided with a third hole and a fourth hole, 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 for adjusting the resonance frequency of one resonance mode of the second dual-mode medium, and the fourth hole is used for adjusting the resonance frequency of the other resonance mode of the second dual-mode medium; and/or

The first double-mode medium is provided with a first coupling part for coupling two resonance modes of the first double-mode medium; the second dual-mode medium is provided with a second coupling part for coupling two resonance modes of the second dual-mode medium; wherein a polarity of coupling between the two resonant modes of the first dual-mode medium is opposite to a polarity of coupling between the two resonant modes of the second dual-mode medium; and/or

The first dual-mode medium is provided with a first connecting end, and the second dual-mode medium is provided with a second connecting end; one of the first connecting end and the second connecting end is an input end, and the other one is an output end.

8. The dielectric body of any one of claims 1 to 5, comprising:

a second single-mode medium;

a coupling medium connected to the second single-mode medium and the first single-mode medium, for coupling the second single-mode medium and the first single-mode medium;

a second bimodal medium; and

a second cross-coupling structure connected to the second dual-mode medium and the second single-mode medium for cross-coupling the second dual-mode medium and the second single-mode medium.

9. The dielectric body of claim 8, wherein: the first single-mode medium, the second single-mode medium and the coupling medium are of an integrated structure; and/or the second single-mode medium, the second dual-mode medium and the second cross-coupling structure are an integral structure; and/or

The second dual-mode medium is of a cubic structure; and/or

The second single-mode medium is of a cuboid structure; and/or

The second cross-coupling structure comprises:

a second coupling medium connected to the second dual-mode medium and the second single-mode medium for coupling the second dual-mode medium and the second single-mode medium; and

a second coupling structure disposed on the second dual-mode medium or the second single-mode medium for coupling the second dual-mode medium with the second single-mode medium;

the second coupling structure is a coupling groove; the second coupling structure is arranged on one side, close to the second single-mode medium, of the second double-mode medium; the second coupling structure is positioned on one side of the second coupling medium; and/or

A second frequency adjusting hole is formed in the second single-mode medium; and/or

10. A dielectric filter, characterized in that the dielectric filter comprises:

the dielectric body of any one of claims 1 to 9; and

and the metal layer is coated on the outer surface of the dielectric body.