Three-mode dielectric resonator, dielectric waveguide filter and dielectric waveguide duplexer

Abstract

The invention provides a three-mode dielectric resonator which comprises a dielectric block, the dielectric block is provided with a pair of first resonant blind holes, a pair of second resonant blind holes and a third resonant blind hole, the first resonant blind holes are arranged along a first diagonal direction of the dielectric block and used for forming a first resonant mode, and the second resonant blind holes are arranged along a second diagonal direction of the dielectric block and used for forming a third resonant mode. The pair of second resonance blind holes are arranged along a second diagonal direction of the dielectric block and are used for forming a second resonance mode, the third resonance blind holes are used for forming a third resonance mode, and the first diagonal direction and the second diagonal direction intersect with each other. The invention also provides a dielectric waveguide filter and a dielectric waveguide duplexer using the resonator unit. When the resonator unit is used for designing a dielectric waveguide filter, a three-mode waveguide structure with independently adjustable resonant modes is realized, multiple resonant modes are realized under the same volume, the overall Q value benefit is achieved, and the resonator unit has the advantages of miniaturization and high Q value benefit.

Description

Technical Field

[0001] The disclosed embodiments of the present application relate to the field of wireless communication technology, and more particularly, to a three-mode dielectric resonator, a dielectric waveguide filter, and a dielectric waveguide duplexer. Background Art

[0002] With the development of modern wireless communication technology, the system has put forward more stringent requirements on the frequency selection performance and miniaturization of filter circuits. Among the many filter circuits, dielectric waveguide filter circuits have gradually become the mainstream of base station filter circuit design due to their miniaturization, high Q value and excellent power carrying capacity. At present, dielectric waveguide filter circuits mainly use "one cavity multi-mode" technology to meet the miniaturization requirements. However, as the number of modes in the resonant cavity increases, the difficulty of tuning also increases. In order to pursue higher-order miniaturization, a cascade structure (such as a dual-mode resonant cavity cascade) is usually adopted, but this will significantly increase the complexity of the system. Against the background of increasingly stringent miniaturization requirements for 5G communications, there is an urgent need to deeply improve and innovate existing technologies in order to develop filtering products that are smaller in size, have better performance and fully meet 5G requirements. Summary of the Invention

[0003] According to the embodiments of the present application, the present application proposes a three-mode dielectric resonator, a dielectric waveguide filter, and a dielectric waveguide duplexer to solve the above problems.

[0004] According to aspects of the present application, an exemplary three-mode dielectric resonator is disclosed, including a dielectric block, on which a pair of first resonant blind holes, a pair of second resonant blind holes, and a third resonant blind hole are provided, wherein the pair of first resonant blind holes are arranged along a first diagonal direction of the dielectric block to form a first resonant mode, the pair of second resonant blind holes are arranged along a second diagonal direction of the dielectric block to form a second resonant mode, and the third resonant blind hole is used to form a third resonant mode, and the first diagonal direction and the second diagonal direction intersect with each other.

[0005] In some embodiments, the dielectric block includes a first plane and a second plane adjacent to each other, wherein the pair of first resonant blind holes and the pair of second resonant blind holes are provided on the first plane, and the third resonant blind hole is provided on the second plane;

[0006] The pair of first resonant blind holes are arranged at opposite ends of a first diagonal line of the first plane and are equidistant from the opposite ends of the first diagonal line of the first plane;

[0007] The pair of second resonant blind holes are arranged at opposite ends of the second diagonal line of the first plane and are equidistant from the opposite ends of the second diagonal line of the first plane;

[0008] The third resonant blind hole is arranged close to the second resonant blind hole.

[0009] In some embodiments, the distances from the pair of first resonant blind holes to the opposite ends of the first diagonal are the same as the distances from the pair of second resonant blind holes to the opposite ends of the second diagonal; the third resonant blind hole is located at the center of the second plane in the first direction and is close to the side corresponding to the second resonant blind hole in the second direction of the second plane.

[0010] In some embodiments, the pair of first resonant blind holes and the pair of second resonant blind holes have the same aperture, and are different from the aperture of the third resonant blind hole; the pair of first resonant blind holes, the pair of second resonant blind holes, and the third resonant blind hole have different depths.

[0011] In some embodiments, the apertures of the pair of first resonant blind holes and the pair of second resonant blind holes are larger than the aperture of the third resonant blind hole; the depth of the pair of first resonant blind holes is smaller than the depth of the pair of second resonant blind holes, and the depth of the third resonant blind hole is larger than the depth of the pair of first resonant blind holes and the depth of the pair of second resonant blind holes.

[0012] According to aspects of the present application, an exemplary dielectric waveguide filter is disclosed, comprising at least one of the aforementioned three-mode dielectric resonators and an input end and an output end for providing electromagnetic excitation to the at least one three-mode dielectric resonator.

[0013] In some embodiments, the at least one three-mode dielectric resonator includes a three-mode dielectric resonator; the dielectric waveguide filter further includes a single-mode dielectric resonator; one of the input end and the output end is provided on the three-mode dielectric resonator, and the other is provided on the single-mode dielectric resonator; the three-mode dielectric resonator and the single-mode dielectric resonator are coupled to each other via a coupling window, so that when electromagnetic excitation is provided at the input end and the output end, the three-mode dielectric resonator and the single-mode dielectric resonator couple to produce a passband; wherein the coupling window corresponds to the first resonant blind hole and is aligned with the side of the dielectric block where the first resonant blind hole is located.

[0014] In some embodiments, the at least one three-mode dielectric resonator includes two three-mode dielectric resonators; one of the input end and the output end is arranged on one of the two three-mode dielectric resonators, and the other is arranged on the other of the two three-mode dielectric resonators; the two three-mode dielectric resonators are coupled via a coupling window, so that when electromagnetic excitation is provided at the input end and the output end, the two three-mode dielectric resonators are coupled to produce a passband; wherein the coupling window corresponds to the first resonant blind hole and is aligned with the side of the dielectric block where the first resonant blind hole is located.

[0015] In some embodiments, the three-mode dielectric resonator further includes a first coupling blind hole, a second coupling blind hole, and a third coupling blind hole, configured to achieve coupling between the first resonant mode, the second resonant mode, and the third resonant mode, and transmission zeros on one or both sides of the passband, wherein the second coupling blind hole is disposed on a first plane of the dielectric block, and the first coupling blind hole and the third coupling blind hole are disposed on a third plane of the dielectric block, the third plane being adjacent to the second plane and opposite to the first plane; the first coupling blind hole is adjacent to the first resonant blind hole and located between the first and third resonant blind holes; the second coupling blind hole is adjacent to the second resonant blind hole and located between the second and third resonant blind holes; the centers of the first and second coupling blind holes are located on different planes, and are located on different planes from the centers of the first and second resonant blind holes; the third coupling blind hole is located between the first and second resonant blind holes, and the center of the third coupling blind hole is located on the same plane as the centers of the first and second resonant blind holes.

[0016] In some embodiments, the first coupling blind hole and the second coupling blind hole have the same aperture and are smaller than the aperture of the third coupling blind hole; the first coupling blind hole, the second coupling blind hole and the third coupling blind hole have different depths.

[0017] In some embodiments, the single-mode dielectric resonator includes a single-mode dielectric block, on which a pair of single-mode resonant blind holes are provided, wherein the pair of single-mode resonant blind holes are provided along a diagonal direction of the single-mode dielectric block to form a resonant mode; the single-mode dielectric block is identical to the dielectric block, and the diagonal direction of the single-mode dielectric block is parallel to a second diagonal direction of the dielectric block; the apertures of the pair of single-mode resonant blind holes are identical to the apertures of the pair of first resonant blind holes and the pair of second resonant blind holes, and the depths of the pair of single-mode resonant blind holes are different from the depths of the pair of first resonant blind holes and the pair of second resonant blind holes.

[0018] According to aspects of the present application, an exemplary dielectric waveguide duplexer is disclosed, comprising: an input end, a first output end, and a second output end; a first dielectric waveguide filter disposed between the input end and the first output end; and a second dielectric waveguide filter disposed between the input end and the second output end; wherein the first dielectric waveguide filter and the second dielectric waveguide filter each include the aforementioned three-mode dielectric resonator.

[0019] In some embodiments, the dielectric waveguide duplexer further includes a feeding portion, wherein the feeding portion is coupled to the three-mode dielectric resonator in the first dielectric waveguide filter through a first feeding coupling window, and is coupled to the three-mode dielectric resonator in the second dielectric waveguide filter through a second feeding coupling window; the first feeding coupling window corresponds to the second resonant blind hole in the first dielectric waveguide filter, and is at a first preset distance from one side of the second resonant blind hole on the dielectric block in the first dielectric waveguide filter; the second feeding coupling window corresponds to the first resonant blind hole in the second dielectric waveguide filter, and is at a first preset distance from the first resonant blind hole. A blind hole is provided on one side of the dielectric block in the first dielectric waveguide filter at a second preset distance from the dielectric block; the input end is provided on the feeding portion, the first output end is provided on the three-mode dielectric resonator in the first dielectric waveguide filter, and the second output end is provided on the three-mode dielectric resonator in the second dielectric waveguide filter; a feeding through hole is also provided on the feeding portion; a first feeding coupling blind hole is provided on the first feeding coupling window, and a second feeding coupling blind hole is provided on the second feeding coupling window, wherein the first feeding coupling blind hole and the second feeding coupling blind hole have the same aperture but different depths.

[0020] In some embodiments, the three-mode dielectric resonators in the first dielectric waveguide filter and the second dielectric waveguide filter each further include a first coupling blind hole, a second coupling blind hole, and a third coupling blind hole, configured to achieve coupling between the first resonant mode, the second resonant mode, and the third resonant mode, and transmission zeros on one or both sides of the passband; wherein the first coupling blind hole, the second coupling blind hole, and the third coupling blind hole are all disposed on a third plane of the dielectric block, the third plane being adjacent to the second plane and opposite to the first plane; the first coupling blind hole is adjacent to the first resonant blind hole and located between the first and third resonant blind holes; the second coupling blind hole is adjacent to the second resonant blind hole and located between the second and third resonant blind holes; the centers of the first coupling blind hole and the second coupling blind hole are located on the same plane, and are located on a different plane from the centers of the first and second resonant blind holes; the third coupling blind hole is located between the first and second resonant blind holes, and the center of the third coupling blind hole is located on the same plane as the centers of the first and second resonant blind holes.

[0021] In some embodiments, the first coupling blind via, the second coupling blind via, and the third coupling blind via have the same aperture, and the first coupling blind via, the second coupling blind via, and the third coupling blind via have different depths.

[0022] The beneficial effects of the present application are as follows: a pair of first resonant blind holes, a pair of second resonant blind holes and a third resonant blind hole are provided on the dielectric block, wherein the pair of first resonant blind holes are provided along the first diagonal direction of the dielectric block to form a first resonant mode, a pair of second resonant blind holes are provided along the second diagonal direction of the dielectric block to form a second resonant mode, and the third resonant blind hole is used to form a third resonant mode, the first diagonal direction and the second diagonal direction intersect with each other, thereby realizing a three-mode waveguide structure with independently adjustable resonant modes, and realizing multiple resonant modes with an overall Q value benefit under the same volume, while having the advantages of miniaturization and high Q value benefit.

[0023] These and other objects of the present application will no doubt become apparent to those skilled in the art after reading the following detailed description of the preferred embodiments illustrated in the drawings and therein. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the perspective structure of a three-mode dielectric resonator according to an embodiment of the present application.

[0025] Figure 2a 4 is a top perspective view of a three-mode dielectric resonator according to an embodiment of the present application.

[0026] Figure 2b FIG. 4 is a side perspective view of a three-mode dielectric resonator according to an embodiment of the present application.

[0027] Figure 3a Schematic diagram of the perspective structure of a single-mode dielectric resonator according to an embodiment of the present application.

[0028] Figure 3b Schematic diagram of the perspective structure of a dual-mode dielectric resonator according to an embodiment of the present application.

[0029] Figure 4 Schematic diagram of the perspective structure of a dielectric waveguide filter according to an embodiment of the present application.

[0030] Figure 5a According to the embodiment of the present application Figure 4 A top perspective view of the dielectric waveguide filter in FIG.

[0031] Figure 5b According to the embodiment of the present application Figure 4 A side perspective view of the dielectric waveguide filter in FIG.

[0032] Figure 6a According to the embodiment of the present application Figure 4 Scattering parameter curve of dielectric waveguide filter in Figure 1 .

[0033] Figure 6b According to the embodiment of the present application Figure 4 Scattering parameter curves of dielectric waveguide filters in Figure 2.

[0034] Figure 7 Schematic diagram of the perspective structure of another dielectric waveguide filter according to an embodiment of the present application.

[0035] Figure 8a According to the embodiment of the present application Figure 7 A top perspective view of the dielectric waveguide filter in FIG.

[0036] Figure 8b According to the embodiment of the present application Figure 7 A side perspective view of the dielectric waveguide filter in FIG.

[0037] Figure 9a According to the embodiment of the present application Figure 7 Scattering parameter curve of dielectric waveguide filter in Figure 1 .

[0038] Figure 9b According to the embodiment of the present application Figure 7 Scattering parameter curve of dielectric waveguide filter in Figure 2.

[0039] Figure 10 Schematic diagram of the perspective structure of a dielectric waveguide duplexer according to an embodiment of the present application.

[0040] Figure 11a According to the embodiment of the present application Figure 10 A top-down perspective view of the dielectric waveguide duplexer in Figure 1.

[0041] Figure 11b According to the embodiment of the present application Figure 10 A side perspective view of the dielectric waveguide duplexer in FIG.

[0042] Figure 12a According to the embodiment of the present application Figure 10 Scattering parameter curve of dielectric waveguide duplexer in Figure 1 .

[0043] Figure 12b According to the embodiment of the present application Figure 7 Scattering parameter curves of the dielectric waveguide duplexer in Figure 2. DETAILED DESCRIPTION

[0044] Certain terms used throughout this specification and claims refer to specific components. As will be appreciated by those skilled in the art, electronic equipment manufacturers may use different names to refer to the same component. Components are not distinguished by name herein, but rather by function. In the following specification and claims, the term "including" is an open-ended qualifier and should therefore be interpreted to mean "including but not limited to...". Additionally, the term "coupled" is intended to mean either an indirect electrical connection or a direct electrical connection. Thus, when one device is coupled to another device, such connection may be a direct electrical connection or an indirect electrical connection achieved through other devices and connections.

[0045] Figure 1 1 is a perspective structural diagram of a three-mode dielectric resonator 100 according to an embodiment of the present application. Figure 2a and Figure 2b They are respectively a top perspective view and a bottom perspective view of the three-mode dielectric resonator 100 according to an embodiment of the present application. Figure 1 、 Figure 2a and Figure 2b As shown, the three-mode dielectric resonator 100 includes a dielectric block q, on which a pair of first resonant blind holes 110, a pair of second resonant blind holes 120, and a third resonant blind hole 130 are provided. The pair of first resonant blind holes 110 are provided along the first diagonal direction d1 of the dielectric block q to form a first resonant mode, the pair of second resonant blind holes 120 are provided along the second diagonal direction d2 of the dielectric block q to form a second resonant mode, and the third resonant blind hole 130 is provided to form a third resonant mode. The first diagonal direction d1 and the second diagonal direction d2 intersect with each other. The first resonant mode and the second resonant mode are both TM (Transverse Magnetic) modes, and the third resonant mode is a TE (Transverse Electric) mode. The dielectric block q uses a dielectric constant E k =20.5, Q f =50000 dielectric material can be a rectangular dielectric block, for example, its length * width * height (L * W * H) can be 18mm * 18mm * 6.5mm, that is, it has a square plane. Of course, it can also be a rectangular dielectric block of other sizes, for example, all planes are rectangular. Among them, in the example where the length and width of the rectangular dielectric block are the same, the first diagonal direction d1 and the second diagonal direction d2 are perpendicular to each other. A pair of first resonant blind holes 110 is used to form a first resonant mode, a pair of second resonant blind holes 120 is used to form a second resonant mode, and a third resonant blind hole 130 is used to form a third resonant mode. Therefore, the resonant frequency of the three-mode dielectric resonator 100 can be controlled by adjusting the depth of the first resonant blind hole 110, the second resonant blind hole 120, and the third resonant blind hole 130.

[0046] Figure 3a Schematic diagram of the perspective structure of a single-mode dielectric resonator according to an embodiment of the present application. Figure 3b The following is a perspective structural diagram of a dual-mode dielectric resonator according to an embodiment of the present application. A comparison of a single-mode dielectric resonator, a dual-mode dielectric resonator, and a triple-mode dielectric resonator 100 is shown in Table 1. The single-mode dielectric resonator has one resonant blind hole, the dual-mode dielectric resonator has two pairs of resonant blind holes, and the triple-mode resonator has a pair of first resonant blind holes 110 and a pair of second resonant blind holes 120. These holes are arranged in the same plane of the corresponding dielectric blocks. It can be seen that the triple-mode dielectric resonator 100 achieves multiple resonant modes within a comparable volume while maintaining an overall Q gain, offering the advantages of both miniaturization and high Q gain.

[0047] Table 1 Q value benefit comparison

[0048]

[0049] It should be noted that the single-mode dielectric resonator, the dual-mode dielectric resonator and the triple-mode dielectric resonator 100 are all rectangular dielectric blocks with the same length and width, but they can also be rectangular blocks of other sizes, for example, rectangular dielectric blocks with different lengths and widths.

[0050] In this embodiment, a pair of first resonant blind holes 110, a pair of second resonant blind holes 120, and a third resonant blind hole 130 are provided on the dielectric block q. The pair of first resonant blind holes 110 are provided along the first diagonal direction d1 of the dielectric block q to form a first resonant mode, the pair of second resonant blind holes 120 are provided along the second diagonal direction d2 of the dielectric block q to form a second resonant mode, and the third resonant blind hole 130 is provided to form a third resonant mode. The first diagonal direction d1 and the second diagonal direction d2 intersect with each other, thereby realizing a three-mode waveguide structure with independently adjustable resonant modes. In addition, multiple resonant modes are realized with an overall Q value benefit in the same volume, and the structure has the advantages of miniaturization and high Q value benefit.

[0051] In some embodiments, continuing as Figure 1 、 Figure 2a and Figure 2bAs shown, the dielectric block q includes an adjacent first plane q1 and a second plane q2, wherein a pair of first resonant blind holes 110 and a pair of second resonant blind holes 120 are provided on the first plane q1, and a third resonant blind hole 130 is provided on the second plane q2; wherein the pair of first resonant blind holes 110 are provided at opposite ends of a first diagonal line of the first plane q1 and are equidistant from the opposite ends of the first diagonal line of the first plane q1; the pair of second resonant blind holes 120 are provided at opposite ends of a second diagonal line of the first plane q1 and are equidistant from the opposite ends of the second diagonal line of the first plane q1; and the third resonant blind hole 130 is provided close to the second resonant blind hole 120.

[0052] A pair of first resonant blind holes 110 and a pair of second resonant blind holes 120 are provided on the first plane q1, and a third resonant blind hole 130 is provided on the second plane q2. In other words, resonant blind holes of three resonant modes are provided on two adjacent planes of the dielectric block q, so that the resonant frequency can be controlled by adjusting the depth of the resonant blind holes in these two planes.

[0053] A pair of first resonant blind holes 110 are disposed at opposite ends of a first diagonal of the first plane q1 and are equidistant from the opposite ends of the first diagonal of the first plane q1. In other words, the distances from the centers of the pair of first resonant blind holes 110 to the two diagonal corners of the dielectric block q are equal. For example, when the distances from the centers of the pair of first resonant blind holes 110 to the adjacent two sides of the dielectric block q are equal, the distances from the centers of the pair of first resonant blind holes 110 to the two diagonal corners of the dielectric block q are equal, and in this case, the first plane q1 is a square. Similarly, a pair of second resonant blind holes 120 are disposed at opposite ends of a second diagonal of the first plane q1 and are equidistant from the opposite ends of the second diagonal of the first plane q1. In other words, the distances from the centers of the pair of second resonant blind holes 120 to the two diagonal corners of the dielectric block q are equal. For example, when the distances from the centers of the pair of second resonant blind holes 120 to the adjacent two sides of the dielectric block q are equal, and the distances from the centers of the pair of second resonant blind holes 120 to the two diagonal corners of the dielectric block q are equal, the first plane q1 is a square plane. The first diagonal of the first plane q1 lies along the first diagonal direction d1 of the dielectric block q, and the second diagonal of the first plane q1 lies along the second diagonal direction d2 of the dielectric block q. From the perspective of the second plane q2, the third resonant blind hole 130 is closer to the second resonant blind hole 120 than the first resonant blind hole 110. Specifically, the center of the third resonant blind hole 130 is closer to the side of the second plane q2 corresponding to the second resonant blind hole 120. Alternatively, the distance from the center of the third resonant blind hole 130 to the side of the second plane q2 corresponding to the second resonant blind hole 120 is smaller than the distance from the center of the third resonant blind hole 130 to the other side of the second plane q2 corresponding to the first resonant blind hole 110.

[0054] In some embodiments, continuing as Figure 1 、 Figure 2a and Figure 2b As shown, the distances between the pair of first resonant blind holes 110 and the opposite ends of the first diagonal line are the same as the distances between the pair of second resonant blind holes 120 and the opposite ends of the second diagonal line; the third resonant blind hole 130 is located at the center of the second plane q2 in the first direction, and is close to the side corresponding to the second resonant blind hole 120 in the second direction of the second plane q2.

[0055] The distances between the pair of first resonant blind holes 110 and the opposite ends of the first diagonal are the same as the distances between the pair of second resonant blind holes 120 and the opposite ends of the second diagonal. That is, the distances between the first and second resonant blind holes 110 and 120 and all sides of the dielectric block q are equal. In this case, the first plane q1 is a square. The first direction of the second plane q2 corresponds to the depth of the dielectric block q, and the second direction of the second plane q2 corresponds to the width of the dielectric block q. The third resonant blind hole 130 is located at the center of the second plane q2 in the first direction, that is, the center of the third resonant blind hole 130 is located at the middle of the depth of the dielectric block q. The third resonant blind hole 130 is located closer to the side of the second resonant blind hole 120 in the second direction of the second plane q2. That is, the center of the third resonant blind hole 130 is closer to the side of the second plane q2 corresponding to the second resonant blind hole 120 in the width direction of the dielectric block q. As a result, the center of the third resonant blind hole 130, which is located toward the side of the second plane q2 corresponding to the second resonant blind hole 120, deviates from the middle of the width of the dielectric block q.

[0056] In some embodiments, continuing as Figure 1 、 Figure 2a and Figure 2b As shown, the apertures of the pair of first resonant blind holes 110 and the pair of second resonant blind holes 120 are the same, and are different from the aperture of the third resonant blind hole 130; the depths of the pair of first resonant blind holes 110, the pair of second resonant blind holes 120 and the third resonant blind hole 130 are different from each other.

[0057] Further, in some embodiments, continuing as Figure 1 、 Figure 2a and Figure 2b As shown, the apertures of the pair of first resonant blind holes 110 and the pair of second resonant blind holes 120 are larger than the aperture of the third resonant blind hole 130; the depth of the pair of first resonant blind holes 110 is smaller than the depth of the pair of second resonant blind holes 120, and the depth of the third resonant blind hole 130 is larger than the depth of the pair of first resonant blind holes 110 and the depth of the pair of second resonant blind holes 120.

[0058] The following description uses a three-mode dielectric resonator 100 with a resonant frequency of 3.5 GHz as an example. The dimensions L*W*H of the three-mode dielectric resonator 100 with a resonant frequency of 3.5 GHz may be 18 mm*18 mm*6.5 mm. The first plane q1 is a plane of 18 mm*18 mm, and the second plane q2 is a plane of 18 mm*6.5 mm. The apertures of the pair of first resonant blind holes 110 and the pair of second resonant blind holes 120 are 1.2 mm. The depths of the pair of first resonant blind holes 110 and the pair of second resonant blind holes 120 are 2.273 mm and 2.365 mm, respectively. The distance from the center of the pair of first resonant blind holes 110 and the pair of second resonant blind holes 120 to each side of the dielectric block q is 4 mm. The third resonant blind hole 130 has an aperture of 1 mm and a depth of 3.1 mm. The distance from the center of the third resonant blind hole 130 to the first plane q1 is 3.25 mm, and the distance from the center of the third resonant blind hole 130 to the plane adjacent to the first plane q1 on the dielectric block q is 8.8 mm. In other words, viewed from the second plane q2, the third resonant blind hole 130 is close to the side of the dielectric block q corresponding to the second resonant blind hole 120.

[0059] See also Figure 4-9b The dielectric waveguide filter includes at least one three-mode dielectric resonator and an input and output end for providing electromagnetic excitation to the at least one three-mode dielectric resonator. The three-mode dielectric resonator is described in detail in the above embodiment and will not be repeated here.

[0060] In some embodiments, as Figure 4 , Figure 5a-5b As shown, the dielectric waveguide filter 200 includes a three-mode dielectric resonator 210 and a single-mode dielectric resonator 220, wherein the three-mode dielectric resonator 210 is the three-mode dielectric resonator 100 of the above embodiment.

[0061] One of the input terminal p1 and the output terminal p2 is provided on the three-mode dielectric resonator 210, and the other is provided on the single-mode dielectric resonator 220. The three-mode dielectric resonator 210 and the single-mode dielectric resonator 220 are coupled via a coupling window cw. When electromagnetic excitation is provided at the input terminal p1 and the output terminal p2, the three-mode dielectric resonator 210 and the single-mode dielectric resonator 220 couple to produce a passband. The coupling window cw corresponds to the first resonant blind hole 110 and is aligned with the side of the first resonant blind hole 110 on the dielectric block q.

[0062] Input terminal p1 and output terminal p2 are coaxially fed using SMA connectors to provide electromagnetic excitation. Input terminal p1 is provided on a three-mode dielectric resonator 210, and output terminal p2 is provided on a single-mode dielectric resonator 220. Input terminal p1 corresponds to the second resonant blind hole 120 of the three-mode dielectric resonator 210. Specifically, the center of input terminal p1 and the second resonant blind hole 120 of the three-mode dielectric resonator 210 are colinear. The second resonant blind hole 120 extends from the first plane q1 of the dielectric block q, while input terminal p1 extends from a third plane q3 of the dielectric block q, opposite the first plane q1.

[0063] The three-mode dielectric resonator 210 is coupled to the single-mode dielectric resonator 220 via a coupling window cw. Adjusting the coupling window cw allows for control of the coupling between the dielectric block q of the adjacent three-mode dielectric resonator 210 and the dielectric block mq of the single-mode dielectric resonator 220. Furthermore, the coupling window cw corresponds to the first resonant blind hole 110, and the coupling window cw couples the first resonant mode to the resonant mode of the single-mode dielectric resonator 220.

[0064] In some embodiments, continuing as Figure 4 , Figure 5a-5b As shown, the single-mode dielectric resonator 220 includes a single-mode dielectric block mq, on which a pair of single-mode resonant blind holes m are provided. The pair of single-mode resonant blind holes m are provided along the diagonal direction of the single-mode dielectric block mq to form a resonant mode. The single-mode dielectric block mq is identical to the dielectric block q, and the diagonal direction of the single-mode dielectric block mq is parallel to the second diagonal direction of the dielectric block q. The apertures of the pair of single-mode resonant blind holes m are identical to the apertures of the pair of first resonant blind holes 110 and the pair of second resonant blind holes 120, and the depths of the pair of single-mode resonant blind holes m are different from the depths of the pair of first resonant blind holes 110 and the pair of second resonant blind holes 120.

[0065] It can be seen that the single-mode dielectric resonator 220 corresponds to the dielectric block q and the pair of second resonant blind holes 120 in the three-mode dielectric resonator 210. That is, the single-mode dielectric block mq and the pair of first-mode resonant blind holes m in the single-mode dielectric resonator 220 correspond to the dielectric block q and the pair of second resonant blind holes 120 in the three-mode dielectric resonator 210, respectively. Thus, a pair of first-mode resonant blind holes m are provided on the first plane q1 of the single-mode dielectric block mq. In other words, a resonant blind hole of a resonant mode is provided on one plane of the single-mode dielectric block mq. The pair of first-mode resonant blind holes m are provided at opposite ends of the second diagonal line of the first plane mq1 of the single-mode dielectric block mq and are equidistant from the opposite ends of the second diagonal line of the first plane mq1 of the single-mode dielectric block mq. In other words, the centers of the pair of first-mode resonant blind holes m are equidistant from the two diagonal corners of the single-mode dielectric block mq. For example, when the distances from the center of a pair of single-mode resonant blind holes m to the adjacent two sides of a single-mode dielectric block mq are equal, the distances from the center of the pair of single-mode resonant blind holes m to the two diagonal corners of the single-mode dielectric block mq are equal. In this case, the first plane mq1 of the single-mode dielectric block mq is also a square plane. The distances from the pair of single-mode resonant blind holes m to the opposite ends of the diagonal of the first plane mq1 of the single-mode dielectric block mq, the distances from the pair of first resonant blind holes 110 to the opposite ends of the first diagonal of the first plane q1 of the dielectric block q, and the distances from the pair of second resonant blind holes 120 to the opposite ends of the second diagonal of the first plane q1 of the dielectric block q are all the same. In other words, the distances from the single-mode resonant blind holes m to the four sides of the single-mode dielectric block mq are the same as the distances from the first resonant blind holes 110 and the second resonant blind holes 120 to the four sides of the dielectric block q.

[0066] In some embodiments, continuing as Figure 4 , Figure 5a-5b As shown, the three-mode dielectric resonator 210 further includes a first coupling blind hole c1, a second coupling blind hole c2, and a third coupling blind hole c3, which are used to achieve coupling between the first resonant mode, the second resonant mode, and the third resonant mode and transmission zero points on one side or both sides of the passband, wherein the second coupling blind hole c2 is arranged on the first plane q1 of the dielectric block q, and the first coupling blind hole c1 and the third coupling blind hole c3 are arranged on the third plane q3 of the dielectric block q, and the third plane q3 is adjacent to the second plane q2 and opposite to the first plane q1.

[0067] The first coupling blind hole c1 is close to the first resonant blind hole 110 and is located between the first resonant blind hole 110 and the third resonant blind hole 130. The second coupling blind hole c2 is close to the second resonant blind hole 120 and is located between the second resonant blind hole 120 and the third resonant blind hole 130. Furthermore, the distance from the center of the first coupling blind hole c1 to the center of the first resonant blind hole 110 is equal to the distance from the center of the second coupling blind hole c2 to the center of the second resonant blind hole 120. In other words, the distance from the center of the first coupling blind hole c1 to the side surface of the dielectric block q adjacent to the first resonant blind hole 110 is equal to the distance from the center of the second coupling blind hole c2 to the side surface of the dielectric block q adjacent to the second resonant blind hole 120.

[0068] The centers of the first coupling blind hole c1 and the second coupling blind hole c2 are located on different planes, and are located on different planes from the centers of the first resonant blind hole 110 and the second resonant blind hole 120. For example, the distance from the center of the first coupling blind hole c1 to the second plane q2 of the dielectric block q is smaller than the distance from the center of the second coupling blind hole c2 to the second plane q2 of the dielectric block q. Simultaneously, the distance from the center of the first coupling blind hole c1 to the second plane q2 of the dielectric block q and the distance from the center of the second coupling blind hole c2 to the second plane q2 of the dielectric block q are both smaller than the distance from the center of the first resonant blind hole 110 and / or the second resonant blind hole 120 to the second plane q2 of the dielectric block q.

[0069] The third coupling blind hole c3 is located between the first resonant blind hole 110 and the second resonant blind hole 120. Furthermore, the center of the third coupling blind hole c3 is located midway between the centers of the first resonant blind hole 110 and the second resonant blind hole 120. The centers of the third coupling blind hole c3 and the centers of the first resonant blind hole 110 and the second resonant blind hole 120 are located on the same plane. In other words, the distance from the center of the third coupling blind hole c3 to the side surface of the dielectric block q is the same as the distance from the centers of the first resonant blind hole 110 and the second resonant blind hole 120 to the side surface of the dielectric block q.

[0070] The first coupling blind hole c1 is used to regulate the coupling between the first resonant mode and the third resonant mode. The second coupling blind hole c2 is used to regulate the coupling between the second resonant mode and the third resonant mode. The third coupling blind hole c3 is used to regulate the coupling between the first resonant mode and the second resonant mode. In addition, by appropriately changing the depth of the first coupling blind hole c1, the second coupling blind hole c2 and the third coupling blind hole c3, the position of the transmission zero point can be changed, for example, Figure 6a As shown, the depths of the first coupling blind hole c1, the second coupling blind hole c2 and the third coupling blind hole c3 are respectively a set of values, and the transmission zero point is located at the upper sideband of the dielectric waveguide filter 200, as shown in FIG. Figure 6bAs shown, the depths of the first coupling blind hole c1, the second coupling blind hole c2, and the third coupling blind hole c3 are respectively another set of values, and the transmission zero point is located at the lower sideband of the dielectric waveguide filter 200. The topology is flexible and variable, thereby improving the selectivity of the dielectric waveguide filter 200.

[0071] Further, in some embodiments, continuing as Figure 4 , Figure 5a-5b As shown, the apertures of the first coupling blind hole c1 and the second coupling blind hole c2 are the same and smaller than the aperture of the third coupling blind hole c3; the depths of the first coupling blind hole c1, the second coupling blind hole c2 and the third coupling blind hole c3 are different from each other.

[0072] The apertures of the first coupling blind hole c1 , the second coupling blind hole c2 and the third coupling blind hole c3 are all smaller than the apertures of the first resonance blind hole 110 , the second resonance blind hole 120 and the third resonance blind hole 130 .

[0073] A specific design example is described below. The dielectric waveguide filter 200 has a center frequency of 3.5 GHz and includes the aforementioned three-mode dielectric resonator 210 having a resonant frequency of 3.5 GHz. For details, see the above description. Furthermore, the first coupling blind via c1 and the second coupling blind via c2 of the three-mode dielectric resonator 210 each have an aperture of 0.75 mm. The distances from their centers to the two side surfaces of the dielectric block q are equal, 6.5 mm, and the distances to the second plane q2 of the dielectric block q are 2.5 mm and 2.9 mm, respectively. The first coupling blind via c1 has a depth of 0.9 mm, the second coupling blind via c2 has a depth of 0.6 mm, and the third coupling blind via c3 has an aperture of 1.1 mm and a depth of 0.7 mm. The third coupling blind via c3 also has a distance of 4 mm from the corresponding side surfaces of the dielectric block q.

[0074] The width of the coupling window is 1 mm. The dimensions (L*W*H) of the single-mode dielectric resonator 220 can also be 18 mm*18 mm*6.5 mm. The first plane mq1 is 18 mm*18 mm. The aperture of the pair of single-mode resonant blind vias m is also 1.2 mm, and the depth is 2.205 mm. The distance from the center of the pair of single-mode resonant blind vias m to each side of the single-mode dielectric block mq is 4 mm.

[0075] In some embodiments, as Figure 7 、 Figure 8a-8b As shown, the dielectric waveguide filter 300 includes two three-mode dielectric resonators 310 - 320 , wherein the two three-mode dielectric resonators 310 - 320 are the three-mode dielectric resonators 100 of the above embodiment.

[0076] One of the input terminal p1 and the output terminal p2 is provided on one of the two three-mode dielectric resonators 310-320, and the other is provided on the other of the two three-mode dielectric resonators 310-320. The two three-mode dielectric resonators 310-320 are coupled via a coupling window cw, so that when electromagnetic excitation is provided by the input terminal p1 and the output terminal p2, the two three-mode dielectric resonators 310-320 couple to generate a passband. The coupling window cw corresponds to the first resonant blind hole 110 and is aligned with the side of the first resonant blind hole 110 on the dielectric block q.

[0077] The input terminal p1 and the output terminal p2 are coaxially fed using SMA connectors to provide electromagnetic excitation. The input terminal p1 is provided on the three-mode dielectric resonator 310, and the output terminal p2 is provided on the three-mode dielectric resonator 320. The input terminal p1 corresponds to the second resonant blind hole 120 of the three-mode dielectric resonator 310. Specifically, the center of the input terminal p1 and the second resonant blind hole 120 of the three-mode dielectric resonator 310 are located on the same straight line. The second resonant blind hole 120 extends from the first plane q1 of the dielectric block q, while the input terminal p1 extends from the third plane q3 of the dielectric block q, which is opposite to the first plane q1. Similarly, the output terminal p2 corresponds to the second resonant blind hole 120 of the three-mode dielectric resonator 320. Specifically, the center of the output terminal p2 and the second resonant blind hole 120 of the three-mode dielectric resonator 320 are located on the same straight line. The second resonant blind hole 120 extends from the first plane q1 of the dielectric block q, while the input terminal p1 extends from the third plane q3 of the dielectric block q, which is opposite to the first plane q1.

[0078] The two three-mode dielectric resonators 310-320 are coupled via a coupling window cw, thereby enabling the coupling between the dielectric blocks q of the two three-mode dielectric resonators 310-320 to be regulated by adjusting the coupling window cw. Furthermore, the coupling window cw corresponds to the first resonant blind hole 110 and couples the two first resonant modes.

[0079] In some embodiments, continuing as Figure 7 , Figure 8a-8b As shown, the two three-mode dielectric resonators 310-320 each include a first coupling blind hole c1, a second coupling blind hole c2, and a third coupling blind hole c3, which are used to achieve coupling between the first resonant mode, the second resonant mode, and the third resonant mode, and transmission zero points on one side or both sides of the passband, wherein the second coupling blind hole c2 is arranged on the first plane q1 of the dielectric block q, and the first coupling blind hole c1 and the third coupling blind hole c3 are arranged on the third plane q3 of the dielectric block q, and the third plane q3 is adjacent to the second plane q2 and opposite to the first plane q1.

[0080] The first coupling blind hole c1 is close to the first resonant blind hole 110 and is located between the first resonant blind hole 110 and the third resonant blind hole 130. The second coupling blind hole c2 is close to the second resonant blind hole 120 and is located between the second resonant blind hole 120 and the third resonant blind hole 130. Furthermore, the distance from the center of the first coupling blind hole c1 to the center of the first resonant blind hole 110 is equal to the distance from the center of the second coupling blind hole c2 to the center of the second resonant blind hole 120. In other words, the distance from the center of the first coupling blind hole c1 to the side surface of the dielectric block q adjacent to the first resonant blind hole 110 is equal to the distance from the center of the second coupling blind hole c2 to the side surface of the dielectric block q adjacent to the second resonant blind hole 120.

[0081] The centers of the first coupling blind hole c1 and the second coupling blind hole c2 are located on different planes, and are located on different planes from the centers of the first resonant blind hole 110 and the second resonant blind hole 120. For example, the distance from the center of the first coupling blind hole c1 to the second plane q2 of the dielectric block q is smaller than the distance from the center of the second coupling blind hole c2 to the second plane q2 of the dielectric block q. Simultaneously, the distance from the center of the first coupling blind hole c1 to the second plane q2 of the dielectric block q and the distance from the center of the second coupling blind hole c2 to the second plane q2 of the dielectric block q are both smaller than the distance from the center of the first resonant blind hole 110 and / or the second resonant blind hole 120 to the second plane q2 of the dielectric block q.

[0082] The third coupling blind hole c3 is located between the first resonant blind hole 110 and the second resonant blind hole 120. Furthermore, the center of the third coupling blind hole c3 is located midway between the centers of the first resonant blind hole 110 and the second resonant blind hole 120. The centers of the third coupling blind hole c3 and the centers of the first resonant blind hole 110 and the second resonant blind hole 120 are located on the same plane. In other words, the distance from the center of the third coupling blind hole c3 to the side surface of the dielectric block q is the same as the distance from the centers of the first resonant blind hole 110 and the second resonant blind hole 120 to the side surface of the dielectric block q.

[0083] The first coupling blind hole c1 is used to regulate the coupling between the first resonant mode and the third resonant mode. The second coupling blind hole c2 is used to regulate the coupling between the second resonant mode and the third resonant mode. The third coupling blind hole c3 is used to regulate the coupling between the first resonant mode and the second resonant mode. In addition, by appropriately changing the depths of the first coupling blind hole c1, the second coupling blind hole c2, and the third coupling blind hole c3 of the three-mode dielectric resonator 310-320, the transmission zero point position can be changed, for example, Figure 9a As shown, the depths of the first coupling blind hole c1, the second coupling blind hole c2 and the third coupling blind hole c3 are respectively a set of values, and the two transmission zero points are located at the upper sideband of the dielectric waveguide filter 300, as shown in FIG. Figure 9bAs shown, the depths of the first coupling blind hole c1, the second coupling blind hole c2, and the third coupling blind hole c3 are respectively another set of values, one transmission zero point is located at the lower sideband of the passband of the dielectric waveguide filter 300, and one transmission zero point is located at the upper sideband of the passband of the dielectric waveguide filter 300. The topology is flexible and variable, thereby improving the selectivity of the dielectric waveguide filter 300.

[0084] Further, in some embodiments, continuing as Figure 7 , Figure 8a-8b As shown, the apertures of the first coupling blind hole c1 and the second coupling blind hole c2 are the same and smaller than the aperture of the third coupling blind hole c3; the depths of the first coupling blind hole c1, the second coupling blind hole c2 and the third coupling blind hole c3 are different from each other.

[0085] The apertures of the first coupling blind hole c1 , the second coupling blind hole c2 and the third coupling blind hole c3 are all smaller than the apertures of the first resonance blind hole 110 , the second resonance blind hole 120 and the third resonance blind hole 130 .

[0086] A specific design example is described below. A dielectric waveguide filter 300 has a center frequency of 3.5 GHz and includes a three-mode dielectric resonator 310, namely, the three-mode dielectric resonator 100 described above with a resonant frequency of 3.5 GHz. For details, see the above description. Furthermore, the first coupling blind via c1 and the second coupling blind via c2 of the three-mode dielectric resonator 310 each have an aperture of 0.75 mm. The distances from their centers to the two side surfaces of the dielectric block q are equal, 6.5 mm, and the distances to the second plane q2 of the dielectric block q are 2.5 mm and 2.9 mm, respectively. The first coupling blind via c1 has a depth of 0.9 mm, the second coupling blind via c2 has a depth of 0.6 mm, and the third coupling blind via c3 has an aperture of 1.1 mm and a depth of 0.7 mm. The third coupling blind via c3 also has a distance of 4 mm from the corresponding side surfaces of the dielectric block q.

[0087] The width of the coupling window cw is 1 mm. Meanwhile, the dimensions L*W*H of the three-mode dielectric resonator 320 with a resonant frequency of 3.5 GHz can also be 18 mm*18 mm*6.5 mm. The three-mode dielectric resonator 320 differs from the three-mode dielectric resonator 310 in that the first resonant blind hole 110, the second resonant blind hole 120, and the third resonant blind hole 130 have different depths, and the first coupling blind hole c1, the second coupling blind hole c2, and the third coupling blind hole c3 have different depths.

[0088] It should be noted that if Figure 7 , Figure 8a-8b As shown, the three-mode dielectric resonator 310 and the three-mode dielectric resonator 320 both use Figure 1 and Figure 2a-2bThe same reference numerals do not necessarily indicate identical three-mode dielectric resonators 100 , wherein the sizes of the three-mode dielectric resonators 310 and 320 are not necessarily the same.

[0089] See also Figure 10 and Figure 11a-Figure 11b A dielectric waveguide duplexer 400 includes: an input end p1, a first output end p21, and a second output end p22; a first dielectric waveguide filter 410, arranged between the input end p1 and the first output end p21; and a second dielectric waveguide filter 420, arranged between the input end p1 and the second output end p22.

[0090] The first dielectric waveguide filter 410 includes a three-mode dielectric resonator 411, and the second dielectric waveguide filter 420 includes a three-mode dielectric resonator 421. The three-mode dielectric resonators 411 and 421 are both the three-mode dielectric resonators 100 in the above embodiment. For details, see the description of the above embodiment.

[0091] The input terminal p1, the first output terminal p21 and the second output terminal p22 are all coaxially fed using SMA connectors to provide electromagnetic excitation.

[0092] In some embodiments, the dielectric waveguide duplexer further includes a feeding section 430. The feeding section 430 is coupled to the three-mode dielectric resonator 411 in the first dielectric waveguide filter 410 via a first feeding coupling window fw1, and is coupled to the three-mode dielectric resonator 421 in the second dielectric waveguide filter 420 via a second feeding coupling window fw2. The first feeding coupling window fw1 corresponds to the second resonant blind hole 120 in the first dielectric waveguide filter 410 and is located a first preset distance from one side of the second resonant blind hole 120 on the dielectric block q in the first dielectric waveguide filter 410. The first feeding coupling window fw1 is used to regulate the coupling between the first dielectric waveguide filter 410 and the feeding section 430. The second feeding coupling window fw2 corresponds to the first resonant blind hole 110 in the second dielectric waveguide filter 420 and is located a second preset distance from one side of the first resonant blind hole 110 on the dielectric block q in the second dielectric waveguide filter 420. The second feeding coupling window fw2 is used to regulate the coupling between the second dielectric waveguide filter 420 and the feeding section 430. The input end p1 is provided on the feeding portion 430 , the first output end p21 is provided on the three-mode dielectric resonator 411 in the first dielectric waveguide filter 410 , and the second output end p22 is provided on the three-mode dielectric resonator 421 in the second dielectric waveguide filter 420 .

[0093] Specifically, the first output end p21 corresponds to the first resonant blind hole 110 of the three-mode dielectric resonator of the first dielectric waveguide filter 410. The center of the first output end p21 is located on the same straight line as the first resonant blind hole 110 of the three-mode dielectric resonator 411 of the first dielectric waveguide filter 410. The first resonant blind hole 110 extends from the first plane q1 of the dielectric block q, while the first output end p21 extends from a third plane q3 of the corresponding dielectric block q, which is opposite to the first plane q1. The second output end p22 corresponds to the second resonant blind hole 120 of the three-mode dielectric resonator 421 of the second dielectric waveguide filter 420. The center of the second output end p22 is located on the same straight line as the second resonant blind hole 120 of the three-mode dielectric resonator 421 of the second dielectric waveguide filter 420. The second resonant blind hole 120 extends from the first plane q1 of the dielectric block q, while the second output end p22 extends from a third plane q3 of the corresponding dielectric block q, which is opposite to the first plane q1.

[0094] The feed section 430 is also provided with a feed hole 431. The center of the feed hole 431 is aligned with the center of the input terminal p1. A first feed coupling blind hole fw11 is provided on the first feed coupling window fw1, and a second feed coupling blind hole fw21 is provided on the second feed coupling window fw2. The first and second feed coupling blind holes fw11 and fw21 have the same aperture but different depths. The first feed coupling blind hole fw11 is used to further control the coupling between the first dielectric waveguide filter 410 and the feed section 430, while the second feed coupling blind hole fw21 is used to further control the coupling between the second dielectric waveguide filter 420 and the feed section 430, improving control flexibility.

[0095] In some embodiments, continuing as Figure 10 and Figure 11a-Figure 11bAs shown, the three-mode dielectric resonator 411 in the first dielectric waveguide filter 410 and the three-mode dielectric resonator 421 in the second dielectric waveguide filter 420 both further include a first coupling blind hole c1, a second coupling blind hole c2, and a third coupling blind hole c3, which are used to achieve coupling between the first resonant mode, the second resonant mode, and the third resonant mode, and transmission zeros on one or both sides of the passband. The first coupling blind hole c1, the second coupling blind hole c2, and the third coupling blind hole c3 are all disposed on a third plane q3 of the dielectric block q, which is adjacent to the second plane q2 and opposite to the first plane q1. The first coupling blind hole c1 is located near the first resonant blind hole 110 and between the first resonant blind hole 110 and the third resonant blind hole 130. The second coupling blind hole c2 is located near the second resonant blind hole 120 and between the second resonant blind hole 120 and the third resonant blind hole 130. Furthermore, the distance from the center of the first coupling blind hole c1 to the center of the first resonant blind hole 110 is equal to the distance from the center of the second coupling blind hole c2 to the center of the second resonant blind hole 120, that is, the distance from the center of the first coupling blind hole c1 to the side surface of the dielectric block q close to the first resonant blind hole 110 is the same as the distance from the center of the second coupling blind hole c2 to the side surface of the dielectric block q close to the second resonant blind hole 120.

[0096] The centers of the first coupling blind hole c1 and the second coupling blind hole c2 are located on the same plane, but on a different plane from the centers of the first resonant blind hole 110 and the second resonant blind hole 120. For example, the distance from the center of the first coupling blind hole c1 to the second plane q2 of the dielectric block q is equal to the distance from the center of the second coupling blind hole c2 to the second plane q2 of the dielectric block q. Furthermore, the distance from the center of the first coupling blind hole c1 to the second plane q2 of the dielectric block q and the distance from the center of the second coupling blind hole c2 to the second plane q2 of the dielectric block q are both greater than the distance from the center of the first resonant blind hole 110 and / or the second resonant blind hole 120 to the second plane q2 of the dielectric block q. The third coupling blind hole c3 is located between the first resonant blind hole 110 and the second resonant blind hole 120. Furthermore, the center of the third coupling blind hole c3 is located midway between the centers of the first resonant blind hole 110 and the second resonant blind hole 120. The center of the third coupling blind hole c3 is located on the same plane as the centers of the first resonant blind hole 110 and the second resonant blind hole 120. That is, the distance from the center of the third coupling blind hole c3 to the side of the dielectric block q is the same as the distance from the center of the first resonance blind hole 110 and the second resonance blind hole 120 to the side of the dielectric block q.

[0097] The first coupling blind hole c1 is used to regulate the coupling between the first resonant mode and the third resonant mode. The second coupling blind hole c2 is used to regulate the coupling between the second resonant mode and the third resonant mode. The third coupling blind hole c3 is used to regulate the coupling between the first resonant mode and the second resonant mode. In addition, by appropriately changing the depths of the first coupling blind hole c1, the second coupling blind hole c2, and the third coupling blind hole c3 of the three-mode dielectric resonators 411 and 421, the transmission zero point position can be changed, for example, Figure 12a As shown, the depths of the first coupling blind hole c1, the second coupling blind hole c2 and the third coupling blind hole c3 are respectively a set of values, and the transmission zero points of the two passbands are both located in the lower sideband of the passband, as shown in FIG. Figure 12b As shown, the depths of the first coupling blind hole c1, the second coupling blind hole c2 and the third coupling blind hole c3 are another set of values, the transmission zero point of the lower passband is located at the upper sideband of the lower passband, and the transmission zero point of the upper passband is located at the lower sideband of the upper passband. The topology is flexible and variable, thereby improving selectivity.

[0098] Further, in some embodiments, continuing as Figure 10 , Figure 11a-Figure 11b As shown, the first coupling blind hole c1, the second coupling blind hole c2, and the third coupling blind hole c3 have the same aperture, and the first coupling blind hole c1, the second coupling blind hole c2, and the third coupling blind hole c3 have different depths. The apertures of the first coupling blind hole c1, the second coupling blind hole c2, and the third coupling blind hole c3 are all smaller than the apertures of the first resonant blind hole 110, the second resonant blind hole 120, and the third resonant blind hole 130. Furthermore, the apertures of the first coupling blind hole c1, the second coupling blind hole c2, and the third coupling blind hole c3 are the same as the apertures of the first feeding coupling blind hole fw11 and the second feeding coupling blind hole fw21.

[0099] It should be noted that if Figure 10 , Figure 11a-Figure 11b As shown, the three-mode dielectric resonator 411 in the first dielectric waveguide filter 410 and the three-mode dielectric resonator 421 in the second dielectric waveguide filter 420 both adopt Figure 1 and Figure 2a-2b The same reference numerals do not necessarily indicate identical three-mode dielectric resonators 100 , wherein the sizes of the three-mode dielectric resonators 411 and 421 are not necessarily the same.

[0100] It is easy for a person skilled in the art to know that many modifications and variations can be made to the apparatus and method while maintaining the teaching content of the present application.Therefore, the above disclosure should be considered as being limited only by the scope of the appended claims.

Claims

1. A three-mode dielectric resonator, characterized in that: The dielectric block includes a pair of first resonant blind holes, a pair of second resonant blind holes, and a third resonant blind hole. The pair of first resonant blind holes are arranged along a first diagonal direction of the dielectric block to form a first resonant mode. The pair of second resonant blind holes are arranged along a second diagonal direction of the dielectric block to form a second resonant mode. The third resonant blind hole is used to form a third resonant mode. The first diagonal direction and the second diagonal direction intersect with each other.

2. The three-mode dielectric resonator according to claim 1, wherein: The dielectric block comprises a first plane and a second plane adjacent to each other, wherein the first plane is provided with the pair of first resonant blind holes and the pair of second resonant blind holes, and the second plane is provided with the third resonant blind hole; The pair of first resonant blind holes are arranged at opposite ends of a first diagonal line of the first plane and are equidistant from the opposite ends of the first diagonal line of the first plane; The pair of second resonant blind holes are arranged at opposite ends of the second diagonal line of the first plane and are equidistant from the opposite ends of the second diagonal line of the first plane; The third resonant blind hole is arranged close to the second resonant blind hole.

3. The three-mode dielectric resonator according to claim 2, wherein: The distances from the pair of first resonant blind holes to the two opposite ends of the first diagonal line are the same as the distances from the pair of second resonant blind holes to the two opposite ends of the second diagonal line; The third resonant blind hole is located at the center of the second plane in the first direction and is close to the side corresponding to the second resonant blind hole in the second direction of the second plane; The pair of first resonant blind holes and the pair of second resonant blind holes have the same aperture, and are different from the aperture of the third resonant blind hole; the pair of first resonant blind holes, the pair of second resonant blind holes and the third resonant blind hole have different depths.

4. The three-mode dielectric resonator according to claim 3, wherein: The apertures of the pair of first resonant blind holes and the pair of second resonant blind holes are larger than the aperture of the third resonant blind hole; the depth of the pair of first resonant blind holes is smaller than the depth of the pair of second resonant blind holes, and the depth of the third resonant blind hole is larger than the depth of the pair of first resonant blind holes and the depth of the pair of second resonant blind holes.

5. A dielectric waveguide filter, characterized in that: The invention comprises at least one three-mode dielectric resonator according to any one of claims 1 to 4, and an input end and an output end for providing electromagnetic excitation to at least one of the three-mode dielectric resonators.

6. The dielectric waveguide filter according to claim 5, wherein The at least one three-mode dielectric resonator comprises a three-mode dielectric resonator; The dielectric waveguide filter further comprises a single-mode dielectric resonator; One of the input end and the output end is provided on the three-mode dielectric resonator, and the other is provided on the single-mode dielectric resonator, the three-mode dielectric resonator and the single-mode dielectric resonator being coupled to each other via a coupling window, so that when electromagnetic excitation is provided to the input end and the output end, the three-mode dielectric resonator and the single-mode dielectric resonator are coupled to generate a passband; wherein the coupling window corresponds to the first resonant blind hole and is aligned with a side of the dielectric block where the first resonant blind hole is located; The single-mode dielectric resonator comprises a single-mode dielectric block, and a pair of single-mode resonant blind holes are provided on the single-mode dielectric block, wherein the pair of single-mode resonant blind holes are arranged along the diagonal direction of the single-mode dielectric block to form a resonant mode; The first-mode dielectric block is identical to the first-mode dielectric block, and a diagonal direction of the first-mode dielectric block is parallel to a second diagonal direction of the first-mode dielectric block; The aperture of the pair of single-mode resonant blind holes is the same as that of the pair of first resonant blind holes and the pair of second resonant blind holes, and the depth of the pair of single-mode resonant blind holes is different from that of the pair of first resonant blind holes and the pair of second resonant blind holes.

7. The dielectric waveguide filter according to claim 5, wherein The at least one three-mode dielectric resonator includes two three-mode dielectric resonators; One of the input end and the output end is provided on one of the two three-mode dielectric resonators, and the other is provided on the other of the two three-mode dielectric resonators; The two three-mode dielectric resonators are coupled to each other through a coupling window, so that when electromagnetic excitation is provided at the input end and the output end, the two three-mode dielectric resonators are coupled to generate a passband; The coupling window corresponds to the first resonant blind hole and is aligned with the side of the dielectric block where the first resonant blind hole is located.

8. The dielectric waveguide filter according to claim 6 or 7, wherein: The three-mode dielectric resonator further includes a first coupling blind hole, a second coupling blind hole, and a third coupling blind hole, which are used to achieve coupling between the first resonant mode, the second resonant mode, and the third resonant mode and transmission zeros on one side or both sides of the passband, wherein the second coupling blind hole is arranged on the first plane of the dielectric block, and the first coupling blind hole and the third coupling blind hole are arranged on the third plane of the dielectric block, and the third plane is adjacent to the second plane and opposite to the first plane; The first coupling blind hole is close to the first resonant blind hole and is located between the first resonant blind hole and the third resonant blind hole; The second coupling blind hole is close to the second resonant blind hole and is located between the second resonant blind hole and the third resonant blind hole; The centers of the first coupling blind hole and the second coupling blind hole are located on different planes, and are also located on different planes as the centers of the first resonant blind hole and the second resonant blind hole; The third coupling blind hole is located between the first resonant blind hole and the second resonant blind hole, and the center of the third coupling blind hole is located on the same plane as the centers of the first resonant blind hole and the second resonant blind hole.

9. The dielectric waveguide filter according to claim 8, wherein The apertures of the first coupling blind hole and the second coupling blind hole are the same and smaller than the aperture of the third coupling blind hole; the depths of the first coupling blind hole, the second coupling blind hole and the third coupling blind hole are different from each other.

10. A dielectric waveguide duplexer, characterized in that: include: an input terminal, a first output terminal, and a second output terminal; a first dielectric waveguide filter, disposed between the input end and the first output end; as well as a second dielectric waveguide filter, disposed between the input end and the second output end; Wherein, the first dielectric waveguide filter and the second dielectric waveguide filter respectively include a three-mode dielectric resonator according to any one of claims 1 to 4; The dielectric waveguide duplexer further includes a feeding portion, wherein the feeding portion is coupled to the three-mode dielectric resonator in the first dielectric waveguide filter through a first feeding coupling window, and is coupled to the three-mode dielectric resonator in the second dielectric waveguide filter through a second feeding coupling window; The first feeding coupling window corresponds to the second resonant blind hole in the first dielectric waveguide filter, and is at a first preset distance from one side of the second resonant blind hole on the dielectric block in the first dielectric waveguide filter; The second feeding coupling window corresponds to the first resonant blind hole in the second dielectric waveguide filter, and is at a second preset distance from one side of the first resonant blind hole on the dielectric block in the first dielectric waveguide filter; The input end is provided on the feeding portion, the first output end is provided on the three-mode dielectric resonator in the first dielectric waveguide filter, and the second output end is provided on the three-mode dielectric resonator in the second dielectric waveguide filter; The feeding portion is also provided with a feeding through hole; A first feeding coupling blind hole is provided on the first feeding coupling window, and a second feeding coupling blind hole is provided on the second feeding coupling window, wherein the first feeding coupling blind hole and the second feeding coupling blind hole have the same aperture but different depths; The three-mode dielectric resonators in the first dielectric waveguide filter and the second dielectric waveguide filter each further include a first coupling blind hole, a second coupling blind hole, and a third coupling blind hole, configured to achieve coupling between the first resonance mode, the second resonance mode, and the third resonance mode, and transmission zeros on one side or both sides of the passband; The first coupling blind hole, the second coupling blind hole and the third coupling blind hole are all arranged on a third plane of the dielectric block, and the third plane is adjacent to the second plane and opposite to the first plane; The first coupling blind hole is close to the first resonant blind hole and is located between the first resonant blind hole and the third resonant blind hole; The second coupling blind hole is close to the second resonant blind hole and is located between the second resonant blind hole and the third resonant blind hole; The centers of the first coupling blind hole and the second coupling blind hole are located on the same plane, and are located on a different plane from the centers of the first resonant blind hole and the second resonant blind hole; The third coupling blind hole is located between the first resonant blind hole and the second resonant blind hole, and the center of the third coupling blind hole is located on the same plane as the centers of the first resonant blind hole and the second resonant blind hole; The first coupling blind hole, the second coupling blind hole and the third coupling blind hole have the same aperture, and the first coupling blind hole, the second coupling blind hole and the third coupling blind hole have different depths.

Images