Trimode dielectric resonator, dielectric waveguide filter and dielectric waveguide duplexer

Abstract

The application provides a three-mode dielectric resonator, comprising a dielectric block, a pair of first resonant blind holes, a pair of second resonant blind holes and a third resonant blind hole are arranged on the dielectric block, wherein the pair of first resonant blind holes are arranged along a first diagonal direction of the dielectric block and used for forming a first resonant mode, the pair of second resonant blind holes are arranged along a second diagonal direction of the dielectric block and used for forming a second resonant mode, and the third resonant blind hole is used for forming a third resonant mode, and the first diagonal direction and the second diagonal direction intersect each other. The application also provides a dielectric waveguide filter and a dielectric waveguide duplexer using the resonator unit. The resonator unit of the application realizes a three-mode waveguide structure with separately adjustable resonant modes when used for designing a dielectric waveguide filter, and realizes multiple resonant modes with overall Q value benefits under the same volume, and has the advantages of miniaturization and high Q value benefits.

Description

Technical Field

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

[0002] With the development of modern wireless communication technology, systems are placing increasingly stringent demands on the frequency selection performance and miniaturization of filtering circuits. Among various filtering circuits, dielectric waveguide (DMW) filtering circuits have gradually become the mainstream in base station filtering circuit design due to their miniaturization, high Q value, and excellent power handling capability. Currently, DWW filtering circuits mainly employ "one-cavity multi-mode" technology to meet miniaturization requirements. However, as the number of modes within the resonant cavity increases, the tuning difficulty also rises. To pursue higher-order miniaturization, cascaded structures (such as dual-mode resonant cavity cascades) are typically used, but this significantly increases system complexity. Given the increasingly stringent miniaturization requirements of 5G communication, there is an urgent need for in-depth improvement and innovation of existing technologies to develop filtering products that are smaller, have better performance, and fully meet 5G requirements. Summary of the Invention

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

[0004] According to an aspect of this application, an exemplary three-mode dielectric resonator is disclosed, comprising a dielectric block, wherein a pair of first resonant blind vias, a pair of second resonant blind vias, and a third resonant blind via are disposed on the dielectric block, wherein the pair of first resonant blind vias are disposed along a first diagonal direction of the dielectric block for forming a first resonant mode, the pair of second resonant blind vias are disposed along a second diagonal direction of the dielectric block for forming a second resonant mode, and the third resonant blind via is used to form a third resonant mode, wherein the first diagonal direction and the second diagonal direction intersect each other.

[0005] In some embodiments, the dielectric block includes adjacent first planes and second planes, wherein the first planes are provided with the pair of first resonant blind vias and the pair of second resonant blind vias, and the second planes are provided with the third resonant blind via;

[0006] Wherein, the pair of first resonant blind holes are disposed at opposite ends of the first diagonal of the first plane and are equidistant from the opposite ends of the first diagonal of the first plane;

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

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

[0009] In some embodiments, the distance from the pair of first resonant blind apertures to the opposite ends of the first diagonal is the same as the distance from the pair of second resonant blind apertures to the opposite ends of the second diagonal; the third resonant blind aperture is located at the center in a first direction of the second plane and moves towards the side corresponding to the second resonant blind aperture in a 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, but a different aperture than the third resonant blind hole; the depths of the pair of first resonant blind holes, the pair of second resonant blind holes, and the third resonant blind hole are different from each other.

[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 depths of the pair of first resonant blind holes are smaller than the depths of the pair of second resonant blind holes, and the depth of the third resonant blind hole is greater than the depths of the pair of first resonant blind holes and the pair of second resonant blind holes.

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

[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 one-mode dielectric resonator; one of the input terminal and the output terminal is disposed on the three-mode dielectric resonator, and the other is disposed on the one-mode dielectric resonator; the three-mode dielectric resonator and the one-mode dielectric resonator are coupled together through a coupling window so that when electromagnetic excitation is provided at the input terminal and the output terminal, the three-mode dielectric resonator and the one-mode dielectric resonator couple to generate a passband; wherein the coupling window corresponds to the first resonant blind aperture and is aligned with the first resonant blind aperture on the side where the first resonant blind aperture is located on the dielectric block.

[0014] In some embodiments, the at least one three-mode dielectric resonator includes two three-mode dielectric resonators; one of the input terminal and the output terminal is disposed on one of the two three-mode dielectric resonators, and the other is disposed on the other of the two three-mode dielectric resonators; the two three-mode dielectric resonators are coupled together through a coupling window so that when electromagnetic excitation is provided at the input terminal and the output terminal, the two three-mode dielectric resonators couple to generate a passband; wherein the coupling window corresponds to the first resonant blind aperture and is aligned with the first resonant blind aperture on the side of the dielectric block.

[0015] In some embodiments, the three-mode dielectric resonator further includes a first coupling blind via, a second coupling blind via, and a third coupling blind via, for realizing coupling between the first resonant mode, the second resonant mode, and the third resonant mode, as well as transmission zeros on one or both sides of the passband. The second coupling blind via is disposed on a first plane of the dielectric block, and the first and third coupling blind vias are disposed on a third plane of the dielectric block. The third plane is adjacent to the second plane and opposite to the first plane. The first coupling blind via is close to the first resonant blind via and located between the first and third resonant blind vias. The second coupling blind via is close to the second resonant blind via and located between the second and third resonant blind vias. The centers of the first and second coupling blind vias are located on different planes, and are on different planes from the centers of the first and second resonant blind vias. The third coupling blind via is located between the first and second resonant blind vias, and its center is on the same plane as the centers of the first and second resonant blind vias.

[0016] In some embodiments, the first coupling blind hole and the second coupling blind hole have the same diameter, which is smaller than the diameter 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.

[0017] In some embodiments, the one-mode dielectric resonator includes a one-mode dielectric block, on which a pair of one-mode resonant blind vias are disposed, wherein the pair of one-mode resonant blind vias are disposed along the diagonal direction of the one-mode dielectric block to form a resonant mode; the one-mode dielectric block is identical to the dielectric block, and the diagonal direction of the one-mode dielectric block is parallel to the second diagonal direction of the dielectric block; the aperture of the pair of one-mode resonant blind vias is the same as the aperture of the pair of first resonant blind vias and the pair of second resonant blind vias, and the depth of the pair of one-mode resonant blind vias is different from the depth of the pair of first resonant blind vias and the pair of second resonant blind vias.

[0018] According to aspects of this application, an exemplary dielectric waveguide duplexer is disclosed, comprising: an input terminal, a first output terminal, and a second output terminal; a first dielectric waveguide filter disposed between the input terminal and the first output terminal; and a second dielectric waveguide filter disposed between the input terminal and the second output terminal; wherein the first dielectric waveguide filter and the second dielectric waveguide filter are respectively comprising the above-described three-mode dielectric resonators.

[0019] In some embodiments, the dielectric waveguide duplexer further includes a feed section, which is coupled to a three-mode dielectric resonator in the first dielectric waveguide filter via a first feed coupling window and to a three-mode dielectric resonator in the second dielectric waveguide filter via a second feed coupling window; the first feed coupling window corresponds to a second resonant blind aperture in the first dielectric waveguide filter and is located at a first preset distance from the second resonant blind aperture on one side of the dielectric block in the first dielectric waveguide filter; the second feed coupling window corresponds to a first resonant blind aperture in the second dielectric waveguide filter and is located at a first preset distance from the first resonant blind aperture on one side of the dielectric block in the first dielectric waveguide filter; The blind hole is located at a second preset distance on one side of the dielectric block in the first dielectric waveguide filter; the input terminal is disposed on the feed section, the first output terminal is disposed on the three-mode dielectric resonator in the first dielectric waveguide filter, and the second output terminal is disposed on the three-mode dielectric resonator in the second dielectric waveguide filter; the feed section is also provided with a feed through hole; the first feed coupling window is provided with a first feed coupling blind hole, and the second feed coupling window is provided with a second feed coupling blind hole, wherein the first feed coupling blind hole and the second feed coupling blind hole have the same diameter but different depths.

[0020] In some embodiments, the three-mode dielectric resonators in the first and second dielectric waveguide filters further include a first coupling blind aperture, a second coupling blind aperture, and a third coupling blind aperture, used to achieve coupling between the first resonant mode, the second resonant mode, and the third resonant mode, as well as transmission zeros on one or both sides of the passband; wherein, the first coupling blind aperture, the second coupling blind aperture, and the third coupling blind aperture 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 aperture is close to the first resonant blind aperture and located between the first resonant blind aperture and the third resonant blind aperture; the second coupling blind aperture is close to the second resonant blind aperture and located between the second resonant blind aperture and the third resonant blind aperture; the centers of the first coupling blind aperture and the second coupling blind aperture are located on the same plane, and are located on different planes from the centers of the first resonant blind aperture and the second resonant blind aperture; the third coupling blind aperture is located between the first resonant blind aperture and the second resonant blind aperture, and the center of the third coupling blind aperture is located on the same plane as the centers of the first resonant blind aperture and the second resonant blind aperture.

[0021] In some embodiments, the first coupling blind hole, the second coupling blind hole, and the third coupling blind hole have the same aperture, and the depths of the first coupling blind hole, the second coupling blind hole, and the third coupling blind hole are different from each other.

[0022] The beneficial effects of this application are as follows: by setting a pair of first resonant blind holes, a pair of second resonant blind holes, and a third resonant blind hole on the dielectric block, wherein the pair of first resonant blind holes are set along the first diagonal direction of the dielectric block to form a first resonant mode, the pair of second resonant blind holes are set 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, and the first diagonal direction and the second diagonal direction intersect each other, a three-mode waveguide structure with individually adjustable resonant modes is realized. Furthermore, multiple resonant modes are realized in the same volume with an overall Q value gain, while having the advantages of miniaturization and high Q value gain.

[0023] These and other objectives of this application will undoubtedly be apparent to those skilled in the art after reading the following detailed description of the figures and the preferred embodiments illustrated therein. Attached Figure Description

[0024] Figure 1 This is a perspective structural diagram of a three-mode dielectric resonator according to an embodiment of this application.

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

[0026] Figure 2b This is a side perspective view of a three-mode dielectric resonator according to an embodiment of this application.

[0027] Figure 3a This is a perspective structural diagram of a single-mode dielectric resonator according to an embodiment of this application.

[0028] Figure 3b This is a perspective structural diagram of a dual-mode dielectric resonator according to an embodiment of this application.

[0029] Figure 4 This is a perspective structural diagram of a dielectric waveguide filter according to an embodiment of this application.

[0030] Figure 5a According to the embodiments of this application Figure 4 A top perspective view of a dielectric waveguide filter.

[0031] Figure 5b According to the embodiments of this application Figure 4 A side perspective view of a dielectric waveguide filter in a medium.

[0032] Figure 6a According to the embodiments of this application Figure 4 Scattering parameter curves of dielectric waveguide filters in Figure 1 .

[0033] Figure 6b According to the embodiments of this application Figure 4 Figure 2 shows the scattering parameter curves of the dielectric waveguide filter.

[0034] Figure 7 This is a perspective structural schematic diagram of another dielectric waveguide filter according to an embodiment of this application.

[0035] Figure 8a According to the embodiments of this application Figure 7 A top perspective view of a dielectric waveguide filter.

[0036] Figure 8b According to the embodiments of this application Figure 7 A side perspective view of a dielectric waveguide filter in a medium.

[0037] Figure 9a According to the embodiments of this application Figure 7 Scattering parameter curves of dielectric waveguide filters in Figure 1 .

[0038] Figure 9b According to the embodiments of this application Figure 7 Figure 2 shows the scattering parameter curves of the dielectric waveguide filter.

[0039] Figure 10 This is a perspective structural diagram of a dielectric waveguide duplexer according to an embodiment of this application.

[0040] Figure 11a According to the embodiments of this application Figure 10 A top perspective view of a dielectric waveguide duplexer.

[0041] Figure 11b According to the embodiments of this application Figure 10 A side perspective view of a dielectric waveguide duplexer.

[0042] Figure 12a According to the embodiments of this application Figure 10 Scattering parameter curves of dielectric waveguide duplexers Figure 1 .

[0043] Figure 12b According to the embodiments of this application Figure 7 Figure 2 shows the scattering parameter curves of the dielectric waveguide duplexer. Detailed Implementation

[0044] Throughout this specification and claims, certain terms refer to specific components. As will be understood by those skilled in the art, electronic device manufacturers may use different names to refer to the same component. Components are distinguished not by name, but by function. In the following specification and claims, the term "comprising" is an open-ended limiting term and should therefore be interpreted as meaning "including but not limited to...". Furthermore, the term "coupled" is intended to mean either an indirect electrical connection or a direct electrical connection. Therefore, when one device is coupled to another device, this connection can be a direct electrical connection or an indirect electrical connection achieved through other devices and connecting parts.

[0045] Figure 1 This is a perspective structural diagram of a three-mode dielectric resonator 100 according to an embodiment of this application. Figure 2a and Figure 2b These are, respectively, top and bottom perspective views of a three-mode dielectric resonator 100 according to an embodiment of this application. Figure 1 , Figure 2a and Figure 2b As shown, the three-mode dielectric resonator 100 includes a dielectric block q. The dielectric block q has a pair of first resonant blind vias 110, a pair of second resonant blind vias 120, and a third resonant blind via 130. The pair of first resonant blind vias 110 are arranged along the first diagonal direction d1 of the dielectric block q to form a first resonant mode. The pair of second resonant blind vias 120 are arranged along the second diagonal direction d2 of the dielectric block q to form a second resonant mode. The third resonant blind via 130 forms a third resonant mode. The first diagonal direction d1 and the second diagonal direction d2 intersect each other. The first and second resonant modes 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 The dielectric material with a density of 50000 can be a rectangular dielectric block, for example, its length * width * height (L*W*H) can be 18mm * 18mm * 6.5mm, i.e., it has a square plane. Of course, it can also be a rectangular dielectric block of other sizes, for example, all planes are rectangular. 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 are used to form a first resonant mode, a pair of second resonant blind holes 120 are used to form a second resonant mode, and a third resonant blind hole 130 is used to form a third resonant mode. Thus, the resonant frequency of the three-mode dielectric resonator 100 can be controlled by adjusting the depth of the first resonant blind holes 110, the second resonant blind holes 120, and the third resonant blind holes 130.

[0046] Figure 3a This is a perspective structural diagram of a single-mode dielectric resonator according to an embodiment of this application. Figure 3b This is a perspective structural diagram of a dual-mode dielectric resonator according to an embodiment of this application. Table 1 compares the single-mode and dual-mode dielectric resonators with the three-mode dielectric resonator 100. The single-mode dielectric resonator has one resonant blind hole, the dual-mode dielectric resonator has two pairs of resonant blind holes, and the three-mode resonator has a pair of first resonant blind holes 110 and a pair of second resonant blind holes 120 arranged from the same plane direction of the corresponding dielectric blocks. It can be seen that the three-mode dielectric resonator 100 achieves multiple resonant modes within the same volume and has an overall Q-value gain, while also possessing the advantages of miniaturization and high Q-value gain.

[0047] Table 1 Comparison of Q-value returns

[0048]

[0049] It should be noted that the single-mode dielectric resonator and the dual-mode dielectric resonator, like the three-mode dielectric resonator 100 mentioned above, are all rectangular dielectric blocks with the same length and width. However, they can also be rectangular blocks of other sizes, such as 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 arranged 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 arranged along the second diagonal direction d2 of the dielectric block q to form a second resonant mode. The third resonant blind hole 130 is used to form a third resonant mode. The first diagonal direction d1 and the second diagonal direction d2 intersect each other, realizing a three-mode waveguide structure with individually adjustable resonant modes. Furthermore, multiple resonant modes are realized in the same volume with an overall Q-value gain, while having the advantages of miniaturization and high Q-value gain.

[0051] In some embodiments, continue as follows Figure 1 , Figure 2a and Figure 2bAs shown, the dielectric block q includes an adjacent first plane q1 and a second plane q2. The first plane q1 is provided with a pair of first resonant blind holes 110 and a pair of second resonant blind holes 120, and the second plane q2 is provided with a third resonant blind hole 130. The pair of first resonant blind holes 110 are located at opposite ends of the first diagonal of the first plane q1 and are equidistant from the opposite ends of the first diagonal of the first plane q1. The pair of second resonant blind holes 120 are located at opposite ends of the second diagonal of the first plane q1 and are equidistant from the opposite ends of the second diagonal of the first plane q1. The third resonant blind hole 130 is located close to the second resonant blind holes 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. That is to say, three resonant blind holes of 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 vias 110 are disposed at opposite ends of the first diagonal of the first plane q1, and are equidistant from the opposite ends of the first diagonal of the first plane q1. That is, the centers of the pair of first resonant blind vias 110 are equidistant from the two angles along the diagonal of the dielectric block q. For example, when the centers of the pair of first resonant blind vias 110 are equidistant from the adjacent sides of the dielectric block q, the centers of the pair of first resonant blind vias 110 are equidistant from the two angles along the diagonal of the dielectric block q, and the first plane q1 is a square plane. Similarly, a pair of second resonant blind vias 120 are disposed at opposite ends of the second diagonal of the first plane q1, and are equidistant from the opposite ends of the second diagonal of the first plane q1. That is, the centers of the pair of second resonant blind vias 120 are equidistant from the two angles along the diagonal of the dielectric block q. For example, when the distances from the centers of a pair of second resonant blind vias 120 to the adjacent sides of the dielectric block q are equal, the distances from the centers of the pair of second resonant blind vias 120 to the two corners along the diagonal of the dielectric block q are equal. In this case, the first plane q1 is a square plane. Specifically, the first diagonal of the first plane q1 lies on the first diagonal direction d1 of the dielectric block q, and the second diagonal of the first plane q1 lies on the second diagonal direction d2 of the dielectric block q. From the perspective of the second plane q2, relative to the first resonant blind via 110, the third resonant blind via 130 is closer to the second resonant blind via 120. That is, the center of the third resonant blind via 130 is closer to one side of the second plane q2 corresponding to the second resonant blind via 120. In other words, the distance from the center of the third resonant blind via 130 to one side of the second plane q2 corresponding to the second resonant blind via 120 is less than the distance from the center of the third resonant blind via 130 to the other side of the second plane q2 corresponding to the first resonant blind via 110.

[0054] In some embodiments, continue as follows Figure 1 , Figure 2a and Figure 2b As shown, the distance from the pair of first resonant blind holes 110 to the opposite ends of the first diagonal is the same as the distance from the pair of second resonant blind holes 120 to the opposite ends of the second diagonal; the third resonant blind hole 130 is located at the center of the first direction of the second plane q2, and moves closer to the side corresponding to the second resonant blind hole 120 in the second direction of the second plane q2.

[0055] The distances from the first pair of first resonant blind vias 110 to the opposite ends of the first diagonal are the same as the distances from the second pair of second resonant blind vias 120 to the opposite ends of the second diagonal. In other words, the distances from the first and second resonant blind vias 110 and 120 to all sides of the dielectric block q are equal. Therefore, the first plane q1 is a square plane. The first direction of the second plane q2 is the depth direction of the dielectric block q, and the second direction of the second plane q2 is the width direction of the dielectric block q. The third resonant blind via 130 is located at the center of the first direction of the second plane q2, meaning the center of the third resonant blind via 130 is located at the middle of the depth of the dielectric block q. The third resonant blind via 130 moves closer to the side corresponding to the second resonant blind via 120 in the second direction of the second plane q2. That is, the center of the third resonant blind via 130 is closer to the side of the second plane q2 corresponding to the second resonant blind via 120 in the width direction of the dielectric block q. Thus, the center of the third resonant blind via 130 moving away from the middle of the width of the dielectric block q from the side of the second plane q2 corresponding to the second resonant blind via 120.

[0056] In some embodiments, continue as follows Figure 1 , Figure 2a and Figure 2b As shown, the diameters 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 diameter 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] Furthermore, in some embodiments, the following continues... Figure 1 , Figure 2a and Figure 2b As shown, the apertures of a pair of first resonant blind holes 110 and a pair of second resonant blind holes 120 are larger than the aperture of a third resonant blind hole 130; the depth of a pair of first resonant blind holes 110 is smaller than the depth of a pair of second resonant blind holes 120, and the depth of a third resonant blind hole 130 is greater than the depths of a pair of first resonant blind holes 110 and a 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 size L*W*H of the three-mode dielectric resonator 100 with a resonant frequency of 3.5 GHz can be 18 mm*18 mm*6.5 mm. The first plane q1 is a plane with a resonant frequency of 18 mm*18 mm, the second plane q2 is a plane with a resonant frequency of 18 mm*6.5 mm, the aperture of a pair of first resonant blind holes 110 and a pair of second resonant blind holes 120 is 1.2 mm, the depth of a pair of first resonant blind holes 110 is 2.273 mm, and the depth of a pair of second resonant blind holes 120 is 2.365 mm. 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 diameter of the third resonant blind hole 130 is 1 mm and the depth is 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 to the plane on the dielectric block q adjacent to the first plane q1 is 8.8 mm. That is to say, from the second plane q2, the third resonant blind hole 130 is closer to the side of the dielectric block q corresponding to the second resonant blind hole 120.

[0059] Please see Figures 4-9b The dielectric waveguide filter includes at least one three-mode dielectric resonator and an input terminal and an output terminal that provide electromagnetic excitation to the at least one three-mode dielectric resonator. The description of the three-mode dielectric resonator is detailed in the above embodiments and will not be repeated here.

[0060] In some embodiments, such as Figure 4 , Figures 5a-5b As shown, the dielectric waveguide filter 200 includes a three-mode dielectric resonator 210 and a one-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 disposed on the three-mode dielectric resonator 210, and the other is disposed on the one-mode dielectric resonator 220. The three-mode dielectric resonator 210 and the one-mode dielectric resonator 220 are coupled together through a coupling window cw so that when electromagnetic excitation is provided at the input terminal p1 and the output terminal p2, the three-mode dielectric resonator 210 and the one-mode dielectric resonator 220 are coupled together to generate a passband. The coupling window cw corresponds to the first resonant blind hole 110 and is aligned with the first resonant blind hole 110 on the same side of 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 located on the three-mode dielectric resonator 210, and output terminal p2 is located on the one-mode dielectric resonator 220. Input terminal p1 corresponds to the second resonant blind hole 120 of the three-mode dielectric resonator 210, that is, the center of input terminal p1 and the second resonant blind hole 120 of the three-mode dielectric resonator 210 are on the same straight line. The second resonant blind hole 120 extends from the first plane q1 of the dielectric block q, and input terminal p1 extends from the third plane q3 on the dielectric block q, which is opposite to the first plane q1.

[0063] The three-mode dielectric resonator 210 and the one-mode dielectric resonator 220 are coupled together through a coupling window cw. This allows for adjustment of the coupling between the dielectric block q of the adjacent three-mode dielectric resonator 210 and the dielectric block mq of the one-mode dielectric resonator 220. Furthermore, the coupling window cw corresponds to the first resonant blind aperture 110, coupling the first resonant mode with the resonant mode of the one-mode dielectric resonator 220.

[0064] In some embodiments, continue as follows Figure 4 , Figures 5a-5b As shown, the one-mode dielectric resonator 220 includes a one-mode dielectric block mq, on which a pair of one-mode resonant blind vias m are provided. The pair of one-mode resonant blind vias mq are arranged along the diagonal direction of the one-mode dielectric block mq to form a resonant mode. The one-mode dielectric block mq is the same as the dielectric block q, and the diagonal direction of the one-mode dielectric block mq is parallel to the second diagonal direction of the dielectric block q. The aperture of the pair of one-mode resonant blind vias m is the same as the aperture of the pair of first resonant blind vias 110 and the pair of second resonant blind vias 120, and the depth of the pair of one-mode resonant blind vias m is different from the depth of the pair of first resonant blind vias 110 and the pair of second resonant blind vias 120.

[0065] It can be seen that the one-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 one-mode dielectric block mq and the pair of one-mode resonant blind holes m of the one-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. Therefore, a pair of one-mode resonant blind holes m are provided on the first plane q1 of the one-mode dielectric block mq. In other words, a resonant blind hole of a resonant mode is provided on one plane of the one-mode dielectric block mq. The pair of one-mode resonant blind holes m are located at opposite ends of the second diagonal of the first plane mq1 of the one-mode dielectric block mq and are equidistant from the opposite ends of the second diagonal of the first plane mq1 of the one-mode dielectric block mq. That is, the center of the pair of one-mode resonant blind holes m is equidistant from the two angles in the diagonal direction of the one-mode dielectric block mq. For example, when the distances from the center of a pair of one-mode resonant blind vias m to the adjacent sides of the one-mode dielectric block mq are equal, the distances from the center of a pair of one-mode resonant blind vias m to the two corners along the diagonal of the one-mode dielectric block mq are equal. In this case, the first plane mq1 of the one-mode dielectric block mq is also a square plane. The distances from a pair of one-mode resonant blind vias m to the opposite ends of the diagonal of the first plane mq1 of the one-mode dielectric block mq, the distances from a pair of first resonant blind vias 110 to the opposite ends of the first diagonal of the first plane q1 of the dielectric block q, and the distances from a pair of second resonant blind vias 120 to the opposite ends of the second diagonal of the first plane q1 of the dielectric block q are all the same. That is to say, the distances from a one-mode resonant blind via m to all sides of the one-mode dielectric block mq are the same as the distances from the first resonant blind vias 110 and 120 to all sides of the dielectric block q.

[0066] In some embodiments, continue as follows Figure 4 , Figures 5a-5b As shown, the three-mode dielectric resonator 210 also includes a first coupling blind hole c1, a second coupling blind hole c2, and a third coupling blind hole c3, which are used to realize the coupling between the first resonant mode, the second resonant mode, and the third resonant mode, as well as the transmission zeros on one or both sides of the passband. The second coupling blind hole c2 is disposed 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 disposed on the third plane q3 of the dielectric block q. The third plane q3 is adjacent to the second plane q2 and opposite to the first plane q1.

[0067] The first coupling blind via c1 is close to the first resonant blind via 110 and is located between the first resonant blind via 110 and the third resonant blind via 130. The second coupling blind via c2 is close to the second resonant blind via 120 and is located between the second resonant blind via 120 and the third resonant blind via 130. Further, the distance from the center of the first coupling blind via c1 to the center of the first resonant blind via 110 is equal to the distance from the center of the second coupling blind via c2 to the center of the second resonant blind via 120, that is, the distance from the center of the first coupling blind via c1 to one side of the dielectric block q near the first resonant blind via 110 is the same as the distance from the center of the second coupling blind via c2 to one side of the dielectric block q near the second resonant blind via 120.

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

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

[0070] The first coupling blind aperture c1 is used to control the coupling between the first resonant mode and the third resonant mode. The second coupling blind aperture c2 is used to control the coupling between the second resonant mode and the third resonant mode. The third coupling blind aperture c3 is used to control the coupling between the first resonant mode and the second resonant mode. Furthermore, by appropriately changing the depths of the first coupling blind aperture c1, the second coupling blind aperture c2, and the third coupling blind aperture c3, the position of the transmission zero point can be changed, for example, as... Figure 6a As shown, the depths of the first coupling blind aperture c1, the second coupling blind aperture c2, and the third coupling blind aperture c3 are each a set of values, and the transmission zero point is located in the upper sideband of the dielectric waveguide filter 200, as shown. 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 another set of values. The transmission zero point is located in 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] Furthermore, in some embodiments, the following continues... Figure 4 , Figures 5a-5b As shown, the diameters of the first coupling blind hole c1 and the second coupling blind hole c2 are the same, and smaller than the diameter 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 diameters 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 diameters of the first resonant blind hole 110, the second resonant blind hole 120, and the third resonant blind hole 130.

[0073] The following is a specific design example. The center frequency of the dielectric waveguide filter 200 is 3.5 GHz. It includes a three-mode dielectric resonator 210 with a resonant frequency of 3.5 GHz, as described above. For details, please refer to the above description. In addition, the aperture of the first coupling blind hole c1 and the second coupling blind hole c2 of the three-mode dielectric resonator 210 is 0.75 mm, and the distance from their centers to the two sides of the dielectric block q is equal, which is 6.5 mm. The distances to the second plane q2 of the dielectric block q are 2.5 mm and 2.9 mm, respectively. The depth of the first coupling blind hole c1 is 0.9 mm, the depth of the second coupling blind hole c2 is 0.6 mm, and the aperture of the third coupling blind hole c3 is 1.1 mm, the depth is 0.7 mm, and the distance to the corresponding side of the dielectric block q is 4 mm.

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

[0075] In some embodiments, such as Figure 7 , Figures 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 disposed on one of the two three-mode dielectric resonators 310-320, and the other is disposed on the other of the two three-mode dielectric resonators 310-320; the two three-mode dielectric resonators 310-320 are coupled together through a coupling window cw so that when electromagnetic excitation is provided at the input terminal p1 and the output terminal p2, the two three-mode dielectric resonators 310-320 couple to generate a passband; wherein the coupling window cw corresponds to the first resonant blind hole 110 and is aligned with the first resonant blind hole 110 on the side where it is located on the dielectric block q.

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

[0078] Two three-mode dielectric resonators 310-320 are coupled together through a coupling window cw, thereby allowing the coupling between the dielectric blocks q of the two three-mode dielectric resonators 310-320 to be controlled by adjusting the coupling window cw. Furthermore, the coupling window cw corresponds to the first resonant blind aperture 110, and the coupling window cw couples the two first resonant modes.

[0079] In some embodiments, continue as follows Figure 7 , Figures 8a-8b As shown, both three-mode dielectric resonators 310-320 include a first coupling blind hole c1, a second coupling blind hole c2, and a third coupling blind hole c3, which are used to realize the coupling between the first resonant mode, the second resonant mode, and the third resonant mode, as well as the transmission zeros on one or both sides of the passband. The second coupling blind hole c2 is disposed 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 disposed on the third plane q3 of the dielectric block q. The third plane q3 is adjacent to the second plane q2 and opposite to the first plane q1.

[0080] The first coupling blind via c1 is close to the first resonant blind via 110 and is located between the first resonant blind via 110 and the third resonant blind via 130. The second coupling blind via c2 is close to the second resonant blind via 120 and is located between the second resonant blind via 120 and the third resonant blind via 130. Further, the distance from the center of the first coupling blind via c1 to the center of the first resonant blind via 110 is equal to the distance from the center of the second coupling blind via c2 to the center of the second resonant blind via 120, that is, the distance from the center of the first coupling blind via c1 to one side of the dielectric block q near the first resonant blind via 110 is the same as the distance from the center of the second coupling blind via c2 to one side of the dielectric block q near the second resonant blind via 120.

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

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

[0083] The first coupling blind aperture c1 is used to control the coupling between the first resonant mode and the third resonant mode. The second coupling blind aperture c2 is used to control the coupling between the second resonant mode and the third resonant mode. The third coupling blind aperture c3 is used to control the coupling between the first resonant mode and the second resonant mode. Furthermore, by appropriately changing the depths of the first coupling blind aperture c1, the second coupling blind aperture c2, and the third coupling blind aperture c3 of the three-mode dielectric resonator 310-320, the position of the transmission zero point can be changed, for example, as... Figure 9a As shown, the depths of the first coupling blind aperture c1, the second coupling blind aperture c2, and the third coupling blind aperture c3 are each a set of values. The two transmission zeros are located in the upper sideband of the dielectric waveguide filter 300, as shown. Figure 9bAs shown, the depths of the first coupling blind aperture c1, the second coupling blind aperture c2, and the third coupling blind aperture c3 are another set of values. One transmission zero is located in the lower sideband of the passband of the dielectric waveguide filter 300, and the other transmission zero is located in 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] Furthermore, in some embodiments, the following continues... Figure 7 , Figures 8a-8b As shown, the diameters of the first coupling blind hole c1 and the second coupling blind hole c2 are the same, and smaller than the diameter 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 diameters 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 diameters of the first resonant blind hole 110, the second resonant blind hole 120, and the third resonant blind hole 130.

[0086] The following is a specific design example. The center frequency of the dielectric waveguide filter 300 is 3.5 GHz. It includes a three-mode dielectric resonator 310, which is the three-mode dielectric resonator 100 with a resonant frequency of 3.5 GHz as described above. For details, please refer to the above description. In addition, the aperture of the first coupling blind hole c1 and the second coupling blind hole c2 of the three-mode dielectric resonator 310 is 0.75 mm, and the distance from their centers to the two sides of the dielectric block q is equal, which is 6.5 mm. The distances to the second plane q2 of the dielectric block q are 2.5 mm and 2.9 mm, respectively. The depth of the first coupling blind hole c1 is 0.9 mm, the depth of the second coupling blind hole c2 is 0.6 mm, and the aperture of the third coupling blind hole c3 is 1.1 mm, the depth is 0.7 mm, and the distance to the corresponding side of the dielectric block q is 4 mm.

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

[0088] It should be noted that, as Figure 7 , Figures 8a-8b As shown, both the three-mode dielectric resonator 310 and the three-mode dielectric resonator 320 employ... Figure 1 and Figures 2a-2bThe designations of the three-mode dielectric resonators 100 are not identical, even if they are the same. The sizes of the individual components in the three-mode dielectric resonators 310 and 320 are not necessarily the same.

[0089] Please see Figure 10 and Figures 11a-11b A dielectric waveguide duplexer 400 includes: an input terminal p1, a first output terminal p21, and a second output terminal p22; a first dielectric waveguide filter 410 disposed between the input terminal p1 and the first output terminal p21; and a second dielectric waveguide filter 420 disposed between the input terminal p1 and the second output terminal 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. Both the three-mode dielectric resonators 411 and 421 are the three-mode dielectric resonators 100 in the above embodiments, as detailed in the description of the above embodiments.

[0091] Input terminal p1, first output terminal p21, and 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 feed section 430, which is coupled to a three-mode dielectric resonator 411 in a first dielectric waveguide filter 410 via a first feed coupling window fw1, and to a three-mode dielectric resonator 421 in a second dielectric waveguide filter 420 via a second feed coupling window fw2. The first feed coupling window fw1 corresponds to a second resonant blind aperture 120 in the first dielectric waveguide filter 410, and is located at a first preset distance from one side of the second resonant blind aperture 120 on the dielectric block q in the first dielectric waveguide filter 410. The first feed coupling window fw1 is used to regulate the coupling between the first dielectric waveguide filter 410 and the feed section 430. The second feed coupling window fw2 corresponds to a first resonant blind aperture 110 in the second dielectric waveguide filter 420, and is located at a second preset distance from one side of the first resonant blind aperture 110 on the dielectric block q in the second dielectric waveguide filter 420. The second feed coupling window fw2 is used to regulate the coupling between the second dielectric waveguide filter 420 and the feed section 430. The input terminal p1 is located on the power supply section 430, the first output terminal p21 is located on the three-mode dielectric resonator 411 in the first dielectric waveguide filter 410, and the second output terminal p22 is located on the three-mode dielectric resonator 421 in the second dielectric waveguide filter 420.

[0093] Specifically, the first output terminal p21 corresponds to the first resonant blind aperture 110 of the three-mode dielectric resonator of the first dielectric waveguide filter 410. The center of the first output terminal p21 is on the same straight line as the first resonant blind aperture 110 of the three-mode dielectric resonator 411 of the first dielectric waveguide filter 410. The first resonant blind aperture 110 extends from the first plane q1 of the dielectric block q, and the first output terminal p21 extends from the third plane q3 of the corresponding dielectric block q, which is opposite to the first plane q1. The second output terminal p22 corresponds to the second resonant blind aperture 120 of the three-mode dielectric resonator 421 of the second dielectric waveguide filter 420. The center of the second output terminal p22 is on the same straight line as the second resonant blind aperture 120 of the three-mode dielectric resonator 421 of the second dielectric waveguide filter 420. The second resonant blind aperture 120 extends from the first plane q1 of the dielectric block q, and the second output terminal p22 extends from the 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 through-hole 431. The center of the feed through-hole 431 is on the same straight line as 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 feed coupling blind hole fw11 and the second feed coupling blind hole fw21 have the same diameter 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, and 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, thereby improving the control flexibility.

[0095] In some embodiments, continue as follows Figure 10 and Figures 11a-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, used to realize coupling between the first resonant mode, the second resonant mode, and the third resonant mode, as well as transmission zeros on one or both sides of the passband; wherein, the first coupling blind hole c1, the second coupling blind hole c2, and the third coupling blind hole c3 are all disposed on the third plane q3 of the dielectric block q, the third plane q3 is adjacent to the second plane q2 and opposite to the first plane q1; 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. That is, the distance from the center of the first coupling blind hole c1 to one side of the dielectric block q near the first resonant blind hole 110 is the same as the distance from the center of the second coupling blind hole c2 to one side of the dielectric block q near the second resonant blind hole 120.

[0096] The centers of the first coupling blind via c1 and the second coupling blind via c2 are located on the same plane, but on different planes from the centers of the first resonant blind via 110 and the second resonant blind via 120. For example, the distance from the center of the first coupling blind via c1 to the second plane q2 of the dielectric block q is equal to the distance from the center of the second coupling blind via c2 to the second plane q2 of the dielectric block q. Simultaneously, the distances from the centers of the first coupling blind via c1 and the second plane q2 of the dielectric block q are both greater than the distances from the centers of the first resonant blind via 110 and / or the second resonant blind via 120 to the second plane q2 of the dielectric block q. The third coupling blind via c3 is located between the first resonant blind via 110 and the second resonant blind via 120. Furthermore, the center of the third coupling blind via c3 is located at the midpoint between the centers of the first resonant blind via 110 and the second resonant blind via 120. The center of the third coupling blind via c3 is on the same plane as the centers of the first resonant blind via 110 and the second resonant blind via 120. In other words, 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 resonant blind hole 110 and the second resonant blind hole 120 to the side of the dielectric block q.

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

[0098] Furthermore, in some embodiments, the following continues... Figure 10 , Figures 11a-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 diameter, while their depths are different. The diameters 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 diameters of the first resonant blind hole 110, the second resonant blind hole 120, and the third resonant blind hole 130. Furthermore, the diameters 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 diameters of the first feed coupling blind hole fw11 and the second feed coupling blind hole fw21.

[0099] It should be noted that, as Figure 10 , Figures 11a-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 employ... Figure 1 and Figures 2a-2b The designations of the three-mode dielectric resonators 100 are not identical, and the sizes of the individual components in the three-mode dielectric resonators 411 and 421 are not necessarily the same.

[0100] Those skilled in the art will readily recognize that numerous modifications and variations can be made to the apparatus and method while maintaining the teachings of this application. Therefore, the above disclosure should be considered limited only by the scope of the appended claims.

Claims

1. A dielectric waveguide duplexer, characterized in that, include: Input terminal, first output terminal, and second output terminal; A first dielectric waveguide filter is disposed between the input terminal and the first output terminal; as well as A second dielectric waveguide filter is disposed between the input terminal and the second output terminal; Wherein, the first dielectric waveguide filter and the second dielectric waveguide filter each include a three-mode dielectric resonator; The three-mode dielectric resonator includes a dielectric block, on which a pair of first resonant blind vias, a pair of second resonant blind vias, and a third resonant blind via are disposed. The pair of first resonant blind vias are disposed along a first diagonal direction of the dielectric block to form a first resonant mode. The pair of second resonant blind vias are disposed along a second diagonal direction of the dielectric block to form a second resonant mode. The third resonant blind via is used to form a third resonant mode. The first diagonal direction and the second diagonal direction intersect each other. The dielectric block includes an adjacent first plane and a second plane, wherein the first plane is provided with the pair of first resonant blind vias and the pair of second resonant blind vias, and the second plane is provided with the third resonant blind via; The dielectric waveguide duplexer also includes a power supply section, which is coupled to the three-mode dielectric resonator in the first dielectric waveguide filter through a first power supply coupling window, and coupled to the three-mode dielectric resonator in the second dielectric waveguide filter through a second power supply coupling window. The first feed coupling window corresponds to the second resonant blind hole in the first dielectric waveguide filter, and is at a first preset distance from the second resonant blind hole on one side of the dielectric block in the first dielectric waveguide filter; The second feed coupling window corresponds to the first resonant blind hole in the second dielectric waveguide filter, and is at a second preset distance from the first resonant blind hole on one side of the dielectric block in the first dielectric waveguide filter; The input terminal is disposed on the feed section, the first output terminal is disposed on the three-mode dielectric resonator in the first dielectric waveguide filter, and the second output terminal is disposed on the three-mode dielectric resonator in the second dielectric waveguide filter; The power supply section is also provided with a power supply through hole; The first power supply coupling window is provided with a first power supply coupling blind hole, and the second power supply coupling window is provided with a second power supply coupling blind hole, wherein the first power supply coupling blind hole and the second power supply coupling blind hole have the same diameter but different depths; The three-mode dielectric resonators in the first dielectric waveguide filter and the second dielectric waveguide filter also include a first coupling blind hole, a second coupling blind hole and a third coupling blind hole, which are used to realize the coupling between the first resonant mode, the second resonant mode and the third resonant mode, as well as the transmission zeros on one or both sides of the passband; The first coupling blind via, the second coupling blind via, and the third coupling blind via are all disposed 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 the same plane, but 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 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 diameter, and their depths are different.

2. The dielectric waveguide duplexer as described in claim 1, characterized in that, The pair of first resonant blind holes are disposed at opposite ends of the first diagonal of the first plane and are equidistant from the opposite ends of the first diagonal of the first plane; The pair of second resonant blind holes are disposed at opposite ends of the second diagonal of the first plane and are equidistant from the opposite ends of the second diagonal of the first plane; The third resonant blind hole is positioned close to the second resonant blind hole.

3. The dielectric waveguide duplexer as described in claim 2, characterized in that, The distance from the pair of first resonant blind holes to the opposite ends of the first diagonal is the same as the distance from the pair of second resonant blind holes to the opposite ends of the second diagonal; The third resonant blind aperture 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 aperture 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, but different aperture from the third resonant blind hole; the depths of the pair of first resonant blind holes, the pair of second resonant blind holes, and the third resonant blind hole are all different. The first direction is the depth direction of the medium block; The second direction is the width direction of the medium block.

4. The dielectric waveguide duplexer as described in claim 3, characterized in that, The diameters of the pair of first resonant blind holes and the pair of second resonant blind holes are larger than the diameter of the third resonant blind hole; the depths of the pair of first resonant blind holes are smaller than the depths of the pair of second resonant blind holes, and the depth of the third resonant blind hole is greater than the depths of the pair of first resonant blind holes and the pair of second resonant blind holes.

Images