WO2020087934A1

WO2020087934A1 - Dielectric resonance block, dielectric waveguide filter, and coupling structure thereof

Info

Publication number: WO2020087934A1
Application number: PCT/CN2019/090794
Authority: WO
Inventors: 张彪; 丁海
Original assignee: 京信通信技术(广州)有限公司
Priority date: 2018-11-01
Filing date: 2019-06-11
Publication date: 2020-05-07
Also published as: CN109449557A; CN109449557B

Abstract

Disclosed by the present invention are a dielectric resonance block, a dielectric waveguide filter, and a coupling structure thereof; a first metallized layer is provided on a dielectric resonance block, an annular through-slot and a second metallized layer disposed within the annular through-slot are provided on the first metallized layer, and the annular through-slot is used to form a coupling window. The present invention may improve the strength of energy coupling between dielectric resonance blocks, prevent higher harmonics from being relatively close to a passband, and achieve good distal out-of-band performance. As a result, the strength of energy coupling of a coupling structure using the dielectric resonance blocks is high, higher harmonics are relatively far away from a passband, and distal out-of-band performance is good. As a result, the strength of energy coupling of a dielectric waveguide filter using the coupling structure is high and distal out-of-band performance is good.

Description

Dielectric resonance block, dielectric waveguide filter and its coupling structure

Technical field

The invention relates to the technical field of communication equipment, in particular to a dielectric resonator block, a dielectric waveguide filter and its coupling structure.

Background technique

With the advent of the 5G era, miniaturized, lightweight, and low-cost microwave radio frequency devices have become the future development trend. With the continuous development of wireless communication, the promotion of green energy and the demand for cost reduction are increasingly strong. The demand for miniaturized, high-performance, and low-power portable terminal systems is increasing. Correspondingly, filters are required to be smaller and lighter. keep improving. The dielectric waveguide filter with its characteristics of miniaturization, light weight and high performance perfectly fits the development needs of 5G communications for devices.

Traditional dielectric waveguide filters mainly rely on the air medium in the coupling window for energy coupling between the dielectric resonator blocks. Due to the limited energy coupling strength, in order to increase the strength of the energy coupling, the size of the coupling window needs to be increased, resulting in high-order Harmonics are closer to the passband, which in turn affects the far-end performance of the dielectric waveguide filter.

Summary of the invention

Based on this, it is necessary to provide a dielectric resonator block, a dielectric waveguide filter and its coupling structure, which can increase the strength of the energy coupling between the dielectric resonator blocks, avoid higher harmonics from being close to the passband, and have good performance of the remote outer band ; In this way, the energy coupling strength of the coupling structure using the dielectric resonator block is high, the higher harmonics are far away from the passband, and the far-end outer band performance is good; thus, the energy coupling of the dielectric waveguide filter using the coupling structure High strength and good performance at the far end.

The technical solution is as follows:

In one aspect, a dielectric resonant block is provided. The dielectric resonant block is provided with a first metallization layer. The first metallization layer is provided with an annular through slot and a second provided in the annular through slot The metallization layer and the annular through-groove are used to form a coupling window.

In the coupling window structure of the above ceramic dielectric waveguide filter, when used, the surfaces of the two dielectric resonator blocks provided with the first metallization layer are adhered to each other, so that the two coupling windows are oppositely arranged and connected, and the two opposite second metals The chemical layers are attached to each other and cooperate to form a first energy transmission channel, and the two annular through slots communicate with each other and cooperate to form a second energy transmission channel, so that not only can the two dielectric resonators pass through the air medium of the second energy transmission channel Energy coupling, and the energy coupling can also be performed through the first energy transmission channel, thereby improving the energy coupling strength between the two dielectric resonance blocks; meanwhile, the two dielectric resonance blocks are mainly conducted through the first energy transmission channel The energy coupling, that is, the energy coupling between the second metallization layers that are attached to each other, depends on the high coupling strength of the metal medium to the energy, which can reduce the size of the coupling window, thereby avoiding the higher harmonics away from the pass band. The problem is that the far-end outband performance is good.

The technical solution is further explained below:

In one of the embodiments, the width of the annular through groove is 0.1 mm to 5 mm. In this way, during debugging, the width of the annular through-slot can be adjusted to adjust the energy coupling strength, which is simple and fast, which reduces the difficulty of debugging and improves the efficiency of debugging.

In one of the embodiments, the shape of the annular through slot is set as a circular ring or a polygon. In this way, the width of the ring-shaped through-slot is uniformly set, which is convenient for adjusting the width of the ring-shaped through-slot, and thus the energy coupling strength can be adjusted simply and conveniently.

In one of the embodiments, the polygon is set as a rectangle. In this way, the outline of the annular through-groove is box-shaped, and the width of the annular through-groove can be uniformly adjusted, which is also convenient for processing and reduces the processing difficulty.

In one embodiment, the thickness of the first metallization layer is 0.01 mm to 2 mm, and the thickness of the second metallization layer is 0.01 mm to 2 mm. In this way, adjusting the thickness of the first metallization layer and the second metallization layer to adjust the energy coupling strength is simple and convenient.

In one of the embodiments, the coupling window is disposed near the central axis of the dielectric resonator block. In this way, the distance of higher harmonics from the passband can be increased, further improving the far-end outband performance.

In one of the embodiments, the dielectric resonant block is further provided with a metalized through-hole that is offset from the coupling window. In this way, the narrow side of the waveguide is configured to transmit the coupling of energy.

On the other hand, there is provided a coupling structure of a dielectric waveguide filter, which includes two above-mentioned dielectric resonance blocks disposed in close contact with each other, and two of the ring-shaped through-slots communicate with each other to form a first energy coupling channel. The second metallization layer is bonded together to form a second energy coupling channel.

In the coupling structure of the above dielectric waveguide filter, when used, the sides of the two dielectric resonator blocks provided with the first metallization layer are attached to each other, so that the two coupling windows are arranged oppositely. At this time, the two ring-shaped through grooves communicate with each other and cooperate A first energy coupling channel is formed, and two opposing second metallization layers are attached to each other and cooperate to form a second energy coupling channel, so that not only can the two dielectric resonators pass through the air medium of the first energy coupling channel for energy Coupling, and the energy coupling can also be performed through the metal medium of the second energy coupling channel, which improves the strength of the energy coupling between the two dielectric resonance blocks, thereby increasing the strength of the energy coupling of the coupling structure; at the same time, the two dielectric resonances The energy coupling between the blocks is mainly through the second energy coupling channel, that is, the energy coupling between the two second metallization layers that are attached to each other, relying on the high coupling strength of the metal medium to the energy, which can reduce the coupling window. Size, which avoids the problem of higher harmonics being closer to the passband, and the far-end outer band performance of the coupling structure is good.

In still another aspect, a dielectric waveguide filter is provided, including: the above coupling structure.

When using the above-mentioned dielectric waveguide filter, the two dielectric resonator blocks of the coupling structure are provided with the first metallization layer attached to each other, so that the two coupling windows are arranged oppositely. At this time, the two annular through slots communicate with each other and Cooperate to form a first energy coupling channel, and two opposing second metallization layers stick to each other and cooperate to form a second energy coupling channel, so that not only can the two dielectric resonators pass through the air medium of the first energy coupling channel for energy And the energy coupling through the metal medium of the second energy coupling channel improves the strength of the energy coupling between the two dielectric resonators, thereby increasing the strength of the energy coupling of the dielectric waveguide filter; at the same time, the two The energy coupling between the two dielectric resonators is mainly through the second energy coupling channel, that is, the energy coupling between the two second metallization layers that are attached to each other depends on the high strength of the energy coupling of the metal medium, which can be reduced The size of the coupling window, thereby avoiding the problem of higher harmonics closer to the passband, the distance of the dielectric waveguide filter Out-of-band performance is good.

BRIEF DESCRIPTION

FIG. 1 is a schematic structural diagram of a dielectric resonator block according to an embodiment;

2 is a schematic structural diagram of a coupling structure of a dielectric waveguide filter according to an embodiment;

3 is a schematic structural view of a coupling structure of a dielectric waveguide filter according to another embodiment.

Description of reference signs:

100. Dielectric resonator, 110, first metallization layer, 120, ring-shaped through slot, 130, coupling window, 140, second metallization layer, 150, metallization via.

detailed description

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and do not limit the protection scope of the present invention.

It should be noted that, when an element is referred to as "set on" or "fixed on" another element, it may be directly on another element or there may be a centered element. When an element is said to be “fixed” to another element or “fixedly connected” to another element, they can be detachable or non-removable. When an element is considered to be "connected" or "rotationally connected" to another element, it may be directly connected to another element or there may be a centered element at the same time. As used herein, the terms "vertical", "horizontal", "left", "right", "upper", "lower" and similar expressions are for illustrative purposes only and do not represent the only implementation.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terminology used in the description of the present invention herein is for the purpose of describing specific embodiments, and is not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more related listed items.

The terms "first", "second", "third" and the like in the present invention do not represent a specific number and order, but are only used to distinguish names.

As shown in FIGS. 1 and 2, in one embodiment, a dielectric resonant block 100 is disclosed. The dielectric resonant block 100 is provided with a first metallization layer 110, and the first metallization layer 110 is provided with an annular through groove 120 and a second metallization layer 140 disposed in the ring-shaped through slot 120. The ring-shaped through slot 120 is used to form the coupling window 130.

When using the dielectric resonator block 100 of the above embodiment, the surfaces of the two dielectric resonator blocks 100 provided with the first metallization layer 110 are attached to each other, so that the two coupling windows 130 are arranged oppositely. At this time, the two annular through slots 120 are connected to each other and cooperate to form a first energy coupling channel, and two opposing second metallization layers 140 are attached to each other and cooperate to form a second energy coupling channel, so that the two dielectric resonator blocks 100 can not only couple through the first energy The air medium of the channel is used for energy coupling, and the metal medium of the second energy coupling channel can also be used for energy coupling, which improves the strength of the energy coupling between the two dielectric resonator blocks 100; meanwhile, the two dielectric resonator blocks 100 The energy is mainly coupled through the second energy coupling channel, that is, the energy coupling between the two second metallization layers 140 that are attached to each other, and the coupling strength of the energy by the metal medium is high, so that the coupling window 130 can be narrowed. Size, which avoids the problem of higher harmonics being closer to the passband, and the far-end outband performance is good.

It should be noted that the shape of the dielectric resonator block 100 may be various, for example, it may be rectangular, square, or circular, as long as it meets the usage requirements. The external dimensions of the coupling window 130 and the area of the second metallization layer 140 can be adjusted during the debugging stage, and only need to meet the actual use requirements, thereby reducing the debugging difficulty and improving the debugging efficiency.

As shown in FIG. 1, in one embodiment, the width of the annular through groove 120 is 0.1 mm to 5 mm. In this way, not only can the reliability of the assembly between the two dielectric resonator blocks 100 be ensured; moreover, during the commissioning phase, by adjusting the width of the annular through-slot 120, the coupling strength of the energy can be changed, so that the two dielectrics can be flexibly The intensity of the energy coupling between the resonant blocks 100 can be adjusted, and the bandwidth of the filter can be adjusted to meet the use requirements, which reduces the difficulty of debugging and improves the debugging efficiency, and also makes the adjustment range wide and versatile. The width of the above-mentioned annular through groove 120 may be 0.1 mm or 5 mm.

The shape of the above-mentioned annular through groove 120 may be circular or polygonal, as long as it can separate the first metallization layer 110 and the second metallization layer 140 and perform energy between the dielectric resonator blocks 100 Coupling is sufficient. In this way, the design flexibility of the coupling window 130 is improved, the processing difficulty is reduced, the production cost is saved, and mass production is facilitated.

Optionally, the shape of the annular through slot 120 is set as a circular ring or a polygon. In this way, the width of the ring-shaped through-slot 120 can be uniformly distributed, which is convenient for adjusting the width of the ring-shaped through-slot 120, thereby facilitating adjustment of the energy coupling strength between the dielectric resonator blocks 100 during the adjustment stage.

As shown in FIGS. 1 and 2, in one embodiment, the contour of the coupling window 130 is set to a first circle, and the outer contour of the second metallization layer 140 is correspondingly set to a second circle, and the second circle is included Within the first circle, the second circle and the first circle are preferably arranged concentrically. In this way, the annular through-slot 120 formed by the gap between the side wall of the second metallization layer 140 and the inner wall of the coupling window 130 is a uniform circular ring, so that the width of the annular through-slot 120 can be adjusted more accurately. During the debugging stage, the energy coupling strength between the dielectric resonance blocks 100 can be accurately adjusted.

As shown in FIG. 3, in another embodiment, the coupling window 130 is set to a first polygon, and the outer contour of the second metallization layer 140 is set to a second polygon matching the first polygon, The second polygon is included in the first polygon, and the second polygon and the first polygon are preferably arranged at the same center of gravity. In this way, the shape of the annular through groove 120 formed by the gap between the side wall of the second metallization layer 140 and the inner wall of the coupling window 130 corresponds to the shape of the polygon, and the width of the annular through groove 120 is preferably uniform, so as to be more accurate Adjust the width of the ring-shaped through slot 120, and then can accurately adjust the energy coupling strength between the dielectric resonance blocks 100 during the debugging stage.

As shown in FIG. 3, specifically in this embodiment, the polygon is set as a rectangle. In this way, the outline of the annular through-slot 120 is a box shape, so that the width of the annular through-slot 120 can be uniformly set; at the same time, the rectangular shape is also convenient for processing and can be mass-produced.

Based on any of the foregoing embodiments, the thickness of the first metallization layer 110 and the thickness of the second metallization layer 140 are the same or approximately the same. In this way, when the two dielectric resonator blocks 100 are assembled and assembled, the two opposing first metallization layers 110 can be closely adhered to each other, and the opposing two second metallization layers 140 can be closely adhered to each other Fit, without interference, to ensure the reliability of energy coupling. The thickness of the first metallization layer 110 is approximately the same as the thickness of the second metallization layer 140. Considering processing and assembly errors, the thickness of the second metallization layer 140 and the thickness of the first metallization layer 110 are allowed to have A certain error should be considered to be the same thickness as long as the error is allowed.

In one embodiment, the thickness of the first metallization layer 110 is 0.01 mm to 2 mm, and the thickness of the second metallization layer 140 is also 0.01 mm to 2 mm. In this way, by adjusting the thickness of the first metallization layer 110 or the thickness of the second metallization layer 140, the size of the energy coupling strength between the two dielectric resonator blocks 100 can be flexibly adjusted to meet the usage requirements. The thickness of the first metallization layer 110 may be 0.01 mm or 2 mm; the thickness of the second metallization layer 140 may be 0.01 mm or 2 mm.

As shown in FIGS. 1 to 3, on the basis of any of the foregoing embodiments, the coupling window 130 is disposed near the central axis of the dielectric resonator block 100. In this way, the higher harmonics can be further away from the passband, further enhancing the far-end outband performance. Preferably, the coupling window 130 is disposed close to the center position of the dielectric resonance block 100, so that the distance of the higher-order harmonics is the farthest from the pass band, and the far-end outer band has the best performance.

As shown in FIGS. 1 to 3, on the basis of any of the foregoing embodiments, the dielectric resonance block 100 is further provided with a metalized through hole 150 that is offset from the coupling window 130. In this way, the narrow side of the waveguide is formed by the metallized via 150, and together with the wide side of the waveguide formed by the first metallization layer 110 and the second metallization layer 140, an electromagnetic wave transmission structure is formed.

As shown in FIG. 2 and FIG. 3, in one embodiment, a coupling structure of a dielectric waveguide filter is also disclosed, which includes two dielectric resonator blocks 100 of any of the above embodiments that are relatively attached to each other, and two The ring-shaped through slots 120 are connected to form a first energy coupling channel, and the two second metallization layers 140 are bonded together to form a second energy coupling channel.

In the coupling structure of the dielectric waveguide filter of the above embodiment, when used, one side of the two dielectric resonator blocks 100 provided with the first metallization layer 110 is attached to each other, so that the two coupling windows 130 are oppositely arranged. The through slots 120 communicate with each other and cooperate to form a first energy coupling channel, and the two opposing second metallization layers 140 are bonded to each other and cooperate to form a second energy coupling channel, so that not only can the two dielectric resonator blocks 100 pass through the first The air medium of the energy coupling channel couples the energy, and the energy coupling through the metal medium of the second energy coupling channel improves the strength of the energy coupling between the two dielectric resonators 100, thereby increasing the energy of the coupling structure The strength of the coupling; at the same time, the energy coupling between the two dielectric resonators 100 is mainly through the second energy coupling channel, that is, the energy coupling between the two second metallization layers 140 that are attached to each other depends on the metal medium pair The energy coupling strength is high, which can reduce the size of the coupling window 130, thereby avoiding the problem of higher harmonics being closer to the passband The distal end of the outer band coupling structure and good performance.

In one embodiment, a dielectric waveguide filter is also disclosed, including the coupling structure of the above embodiment.

When using the dielectric waveguide filter of the above embodiment, the two dielectric resonator blocks 100 of the coupling structure provided with the first metallization layer 110 are attached to each other, so that the two coupling windows 130 are oppositely arranged. The ring-shaped through-slots 120 communicate with each other and cooperate to form a first energy coupling channel, and the two opposing second metallization layers 140 are attached to each other and cooperate to form a second energy coupling channel, so that not only can the two dielectric resonator blocks 100 pass through The air medium of an energy coupling channel performs energy coupling, and energy coupling can also be performed through the metal medium of the second energy coupling channel, which improves the strength of energy coupling between the two dielectric resonator blocks 100, thereby improving the dielectric waveguide filtering. The strength of the energy coupling of the device; at the same time, the energy coupling between the two dielectric resonators 100 is mainly through the second energy coupling channel, that is, the energy coupling between the two second metallization layers 140 that are attached to each other depends on The metal medium has high energy coupling strength, which can reduce the size of the coupling window 130, thereby avoiding the higher harmonics away from the pass band Problem, the distal end of the outer band of the dielectric waveguide filter performance is good.

The above-mentioned dielectric waveguide filters are particularly suitable for ceramic dielectric waveguide filters, and their characteristics of miniaturization, light weight, and high performance meet the development needs of devices for communications.

The technical features of the above embodiments can be arbitrarily combined. To simplify the description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be It is considered to be within the scope of this description.

The above examples only express several embodiments of the present invention, and their descriptions are more specific and detailed, but they should not be construed as constraints on the patent scope of the invention. It should be noted that, for a person of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all fall within the protection scope of the present invention. Therefore, the protection scope of the invention patent shall be subject to the appended claims.

Claims

A dielectric resonant block, characterized in that the dielectric resonant block is provided with a first metallization layer, and the first metallization layer is provided with an annular through slot and a second metal provided in the annular through slot Layer, the annular through-groove is used to form a coupling window.
The dielectric resonator block according to claim 1, wherein the width of the annular through groove is 0.1 mm to 5 mm.
The dielectric resonator block according to claim 1, wherein the shape of the annular through groove is set as a circular ring or a polygon.
The dielectric resonator block according to claim 3, wherein the polygon is set as a rectangle.
The dielectric resonator block according to claim 1, wherein the thickness of the first metallization layer and the thickness of the second metallization layer are the same or approximately the same.
The dielectric resonator block according to claim 1, wherein the thickness of the first metallization layer is 0.01 mm to 2 mm, and the thickness of the second metallization layer is 0.01 mm to 2 mm.
The dielectric resonator block according to claim 1, wherein the coupling window is disposed near a central axis of the dielectric resonator block.
The dielectric resonant block according to claim 1, wherein the dielectric resonant block is further provided with a metalized through hole which is offset from the coupling window.
A coupling structure of a dielectric waveguide filter, characterized in that it comprises two dielectric resonator blocks as claimed in any one of claims 1 to 8 which are arranged in close contact with each other, and the two ring-shaped through grooves are connected to form a first An energy coupling channel. Two second metallization layers are bonded together to form a second energy coupling channel.
A dielectric waveguide filter, characterized by comprising the coupling structure according to claim 9.