Dielectric filters and communication equipment

Abstract

The present invention discloses a dielectric filter and a communication device, wherein the dielectric filter comprises a dielectric body; a first resonance hole and a second resonance hole are arranged at intervals on the dielectric body, and a first metal layer is arranged on the surface of the dielectric body, the hole wall of the first resonance hole and the hole wall of the second resonance hole; a tuning hole is also arranged on the dielectric body, and the tuning hole is located between the first resonance hole and the second resonance hole; and an arc groove is arranged on the dielectric body and surrounds the tuning hole; the communication device comprises the above-mentioned dielectric filter. The dielectric body is provided with a tuning hole, and an arc groove is also opened on the periphery of the tuning hole. The structure can generate negative coupling, thereby generating an attenuation pole outside the frequency response passband, thereby improving the frequency selection characteristics of the dielectric filter, and the structure is simple and the production process is not complicated.

Description

Technical Field

[0001] The present invention relates to the technical field of communication equipment, and in particular to a dielectric filter and communication equipment. Background Art

[0002] Dielectric filters are made of dielectric ceramic materials and are usually used in communication equipment such as antennas and transceivers. With the continuous development of communication technology, the performance requirements for filters are getting higher and higher, such as high-frequency selection characteristics. However, the high-frequency selection characteristics of existing dielectric filters are poor and the process is complicated. Summary of the invention

[0003] Based on this, it is necessary to provide a dielectric filter and a communication device; the dielectric filter has good frequency selection characteristics and a simple production process; the communication device includes the aforementioned dielectric filter.

[0004] The technical solution is as follows:

[0005] On the one hand, a dielectric filter is provided, comprising a dielectric body; a first resonance hole and a second resonance hole are arranged at intervals on the dielectric body, and a first metal layer is arranged on the surface of the dielectric body and the hole wall of the first resonance hole and the hole wall of the second resonance hole; a tuning hole is also arranged on the dielectric body, and the tuning hole is located between the first resonance hole and the second resonance hole; and an arc groove is arranged on the dielectric body and around the tuning hole.

[0006] The above-mentioned dielectric filter has a tuning hole on the dielectric body and an arc groove on the periphery of the tuning hole. This structure can produce negative coupling, thereby producing an attenuation pole outside the frequency response passband, thereby improving the frequency selection characteristics of the dielectric filter. The structure is simple and the production process is not complicated.

[0007] The technical solution is further described below:

[0008] In one embodiment, the dielectric body has a first side and a second side opposite to each other, the first resonance hole, the second resonance hole and the tuning hole are all arranged on the first side, and the arc groove is opened on the first side or / and the second side.

[0009] In one embodiment, the arc-shaped groove located on the first side is a first groove, and at least two first grooves are arranged at intervals;

[0010] Or the arc-shaped groove located on the second side is a second groove, and at least two second grooves are arranged at intervals;

[0011] Or the arc-shaped groove located on the first side is the first groove, and the arc-shaped groove located on the second side is the second groove. At least two first grooves are arranged at intervals, and at least two second grooves are arranged at intervals.

[0012] In one embodiment, the groove depth of one first groove is different from the groove depth of another first groove;

[0013] or the groove depth of one second groove is different from the groove depth of another second groove;

[0014] Or the groove depth of a first groove is different from the groove depth of a second groove.

[0015] In one embodiment, the curvature of one first groove is the same as the curvature of another first groove;

[0016] or the arc of one second groove is the same as the arc of another second groove;

[0017] Or the curvature of a first groove is the same as the curvature of a second groove.

[0018] In one embodiment, one first slot and another first slot are located on opposite sides of the tuning hole;

[0019] or one second slot and another second slot are located at opposite sides of the tuning hole;

[0020] Or on a projection plane, a first groove and a second groove are respectively located on two opposite sides of the tuning hole.

[0021] In one of the embodiments, the groove wall of the arc groove is provided with a second metal layer; or / and the hole wall of the tuning hole is provided with a third metal layer.

[0022] In one embodiment, the groove wall of the arc-shaped groove includes a first side wall and a first bottom wall, and the second metal layer is disposed on the first side wall and / or the first bottom wall;

[0023] The hole wall of the tuning hole or / and the tuning hole includes a second side wall and a second bottom wall, and the third metal layer is arranged on the second side wall or / and the second bottom wall.

[0024] In one embodiment, a separation through hole, a third resonant hole and a fourth resonant hole are further provided on the dielectric body, and the first resonant hole, the second resonant hole, the third resonant hole and the fourth resonant hole are located at the periphery of the separation through hole.

[0025] On the other hand, a communication device is also provided, comprising the dielectric filter as described in any of the above technical solutions.

[0026] The above communication device, including the above dielectric filter, has good frequency selection characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of a first implementation of a dielectric filter;

[0028] Figure 2 is a schematic diagram of a second implementation of a dielectric filter;

[0029] Figure 3 for Figure 2 A top view of the dielectric filter in FIG.

[0030] Figure 4 is a schematic diagram of a third implementation of a dielectric filter;

[0031] Figure 5 is a schematic diagram of a fourth embodiment of a dielectric filter;

[0032] Figure 6 for Figure 5 Schematic diagram of the dielectric filter in FIG.

[0033] Figure 7 A first structural cross-sectional view of a tuning hole, a first slot, and a second slot;

[0034] Figure 8 A second structural cross-sectional view of the tuning hole, the first slot and the second slot;

[0035] Fig. 9 is a third structural cross-sectional view of the tuning hole, the first slot and the second slot;

[0036] Fig.10 is a fourth structural cross-sectional view of the tuning hole, the first slot and the second slot;

[0037] Fig.11 is a fifth structural cross-sectional view of the tuning hole, the first slot and the second slot;

[0038] Fig.12 is a sixth structural cross-sectional view of the tuning hole, the first slot and the second slot;

[0039] Fig.13 is a seventh structural cross-sectional view of the tuning hole, the first slot and the second slot;

[0040] Fig.14 is an eighth structural cross-sectional view of the tuning hole, the first slot and the second slot;

[0041] Fig.15 is a ninth structural cross-sectional view of the tuning hole, the first slot and the second slot;

[0042] Fig.16 is a tenth structural cross-sectional view of the tuning hole, the first slot and the second slot;

[0043] Fig.17 is an eleventh structural cross-sectional view of the tuning hole, the first slot and the second slot;

[0044] Fig.18 It is a twelfth structural cross-sectional view of the tuning hole, the first slot and the second slot.

[0045] Notes on the attached drawings:

[0046] 100, dielectric body; 111, first resonant hole; 112, second resonant hole; 113, third resonant hole; 114, fourth resonant hole; 120, partition through hole; 130, tuning hole; 141, first slot; 142, second slot. DETAILED DESCRIPTION

[0047] The embodiments of the present invention are described in detail below with reference to the accompanying drawings:

[0048] It should be noted that when an element is referred to herein as being "fixed" to another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0050] Please refer to Figures 1 to 18 A dielectric filter comprises a dielectric body 100; a first resonance hole 111 and a second resonance hole 112 are arranged at intervals on the dielectric body 100, and a first metal layer is arranged on the surface of the dielectric body 100 and the hole wall of the first resonance hole 111 and the hole wall of the second resonance hole 112; a tuning hole 130 is also arranged on the dielectric body 100, and the tuning hole 130 is located between the first resonance hole 111 and the second resonance hole 112; and an arc groove is arranged on the dielectric body 100 and around the tuning hole 130.

[0051] In the dielectric filter, a tuning hole 130 is provided on the dielectric body 100, and an arc groove is also provided on the periphery of the tuning hole 130. This structure can generate negative coupling, thereby generating an attenuation pole outside the frequency response passband, thereby improving the frequency selection characteristics of the dielectric filter, and has a simple structure and uncomplicated production process.

[0052] The dielectric body 100 can be arranged in a plate shape. The dielectric body 100 is made of a ceramic dielectric material with a high dielectric constant, and its surface has a first metal layer, that is, the surface of the dielectric body 100 is metallized. The first resonant hole 111 and a portion of the dielectric body 100 corresponding to the position of the first resonant hole 111 form a first resonator; the second resonant hole 112 and a portion of the dielectric body 100 corresponding to the position of the second resonant hole 112 form a second resonator. The hole wall of the first resonant hole 111 and the hole wall of the second resonant hole 112 also need to be metallized to achieve the corresponding function, so that the dielectric body 100, the first resonant hole 111, the second resonant hole 112, the tuning hole 130, the strip groove, etc. can form a waveguide dielectric filter / resonator, which will not be repeated here. .

[0053] An arc groove is a groove whose trajectory is arc-shaped. Figure 1 As shown, the arc-shaped groove is arranged around the outer periphery of the tuning hole 130; the arc-shaped groove is a non-through groove, that is, a blind groove.

[0054] In the specific design, the depth of the tuning hole 130, the depth of the arc groove, the curvature of the arc groove, and the distance between the arc groove and the tuning hole 130 can be designed according to the strength of the negative coupling required, so as to generate corresponding negative coupling and have better frequency selection characteristics. That is, by designing different depths of the tuning hole 130, the depth of the arc groove, the curvature of the arc groove, and the distance between the arc groove and the tuning hole 130, attenuation poles outside the frequency response passband with different strengths can be obtained; in addition, the structure is simple, the processing is convenient, and the process flow is not complicated.

[0055] Of course, it should be noted that this embodiment only provides the main structure of the dielectric filter. As for other circuit structures and corresponding electronic components, they can be configured according to conventional arrangements known to those skilled in the art, and will not be described in detail here.

[0056] Please refer to Figures 1 to 6 The dielectric body 100 has a first side and a second side opposite to each other, the first resonance hole 111, the second resonance hole 112 and the tuning hole 130 are all arranged on the first side, and the arc groove is opened on the first side or / and the second side.

[0057] The arc groove may be provided on the first side, the second side, or both the first side and the second side, that is, at least one of the two side surfaces of the dielectric body 100 is provided with an arc groove. Since the first resonance hole 111, the second resonance hole 112, and the tuning hole 130 (the tuning hole 130 may be a blind hole) are all located on the first side of the dielectric body 100, the arc groove may be located on the same side as the tuning hole 130, or on a different side from the tuning hole 130.

[0058] It should be noted that when the arc-shaped slot and the tuning hole 130 are respectively located on the second side and the first side, the arc-shaped slot is arranged around the tuning hole 130, which should be understood as when the arc-shaped slot and the tuning hole 130 are projected on the same plane (such as the first side surface), the arc-shaped slot is arranged around the tuning hole 130, which will not be repeated here.

[0059] Please refer to Figure 1 The arc-shaped groove located on the first side is the first groove 141, and at least two first grooves 141 are arranged at intervals.

[0060] Similarly, the arc-shaped groove located on the second side may be the second groove 142, and at least two second grooves 142 are provided at intervals;

[0061] Alternatively, the arc-shaped groove located on the first side is the first groove 141 , the arc-shaped groove located on the second side is the second groove 142 , at least two first grooves 141 are provided at intervals, and at least two second grooves 142 are provided at intervals.

[0062] It should be noted that, for the convenience of naming and description, the arc groove on the first side is uniformly referred to as the first groove 141, and the arc groove on the second side is uniformly referred to as the second groove 142. The names are uniformly used in different schemes to avoid confusion in the description and will not be repeated.

[0063] Whether to open arc grooves on the first side and the second side and the number of arc grooves are set according to the actual required strength of the attenuation pole outside the frequency response passband, which will not be elaborated herein.

[0064] In addition, there is at least one arc-shaped groove, which has several conditions:

[0065] The arc-shaped groove is only provided on the first side of the dielectric body 100, and at least one arc-shaped groove is provided;

[0066] The arc-shaped groove is only provided on the second side of the dielectric body 100, and at least one arc-shaped groove is provided;

[0067] The arc-shaped groove is disposed on both the first side and the second side of the dielectric body 100 , and at least one arc-shaped groove is disposed on each side.

[0068] like Figure 1 In the illustrated embodiment, two first grooves 141 are provided on the first side;

[0069] Figure 2 and Figure 3 In the illustrated embodiment, a first groove 141 is provided on the first side;

[0070] Figure 4 In the embodiment shown, a first groove 141 is provided on the first side, but Figure 3 The first slot 141 in the illustrated embodiment is located differently;

[0071] Figure 5 and Figure 6 In the illustrated embodiment, the first side does not have a first groove 141, and the second side is provided with at least one second groove 142 (not shown in the figure);

[0072] Figures 7 to 9 In the illustrated embodiment, a first groove 141 is provided on the first side, and two second grooves 142 are provided at intervals on the second side;

[0073] Figures 10 to 12 In the illustrated embodiment, a first groove 141 is formed on the first side, and a second groove 142 is formed on the second side;

[0074] Figures 13 to 15 In the middle, two second grooves 142 are provided at intervals on the second side;

[0075] Figures 16 to 18 In the embodiment, the first side does not have a first groove 141, but the second side has a second groove 142.

[0076] In one embodiment, the groove depth of one first groove 141 is different from the groove depth of another first groove 141 .

[0077] Please refer to Figures 7 to 9 , the groove depth of one second groove 142 is different from the groove depth of another second groove 142 .

[0078] In one embodiment, the groove depth of a first groove 141 is different from the groove depth of a second groove 142 .

[0079] Since the arc-shaped groove is opened on the first side or the second side, or both the first side and the second side, and the groove depth will affect the strength of the attenuation pole outside the final frequency response passband, different depths can be set as needed to meet the needs, which will not be repeated here.

[0080] Of course, if the requirements are met, the depths of at least two arc-shaped grooves can also be set to be the same, which will not be elaborated here.

[0081] Please refer to Figure 1 The arc of one first groove 141 is the same as the arc of another first groove 141. Of course, they may also be different.

[0082] Similarly, the curvature of one second groove 142 is the same as the curvature of another second groove 142 .

[0083] In addition, the curvature of one first groove 141 is the same as the curvature of one second groove 142 .

[0084] It should be noted here that the curvature of the arc of different arc-shaped slots can be the same or different, as long as they can meet the required strength requirements of the attenuation pole outside the frequency response passband. When they are the same, it is more convenient to manufacture during processing, so it will not be elaborated.

[0085] Please refer to Figure 1 , one first slot 141 and another first slot 141 are respectively located at two opposite sides of the tuning hole 130 .

[0086] Similarly, one second slot 142 and another second slot 142 are located at opposite sides of the tuning hole 130 ;

[0087] In addition, a first groove 141 and a second groove 142 are respectively located at two opposite sides of the tuning hole 130 on a projection plane.

[0088] Please refer to Figures 7 to 18 , the groove wall of the arc groove is provided with a second metal layer; or / and the hole wall of the tuning hole 130 is provided with a third metal layer.

[0089] The slot wall of the arc slot and / or the hole wall of the tuning hole 130 are metallized to enhance the strength of the attenuation pole outside the frequency response passband.

[0090] Please refer to Figures 7 to 18 The groove wall of the arc groove includes a first side wall and a first bottom wall, and the second metal layer is arranged on the first side wall and / or the first bottom wall.

[0091] Please refer to Figures 7 to 18 The hole wall of the tuning hole 130 includes a second side wall and a second bottom wall, and the third metal layer is disposed on the second side wall and / or the second bottom wall.

[0092] Of course, it can also be that: the groove wall of the arc groove is provided with a second metal layer, and the second metal layer can be provided on the first side wall and / or the first bottom wall; at the same time, the hole wall of the tuning hole 130 is also provided with a third metal layer, and the third metal layer is provided on the second side wall and / or the second bottom wall. In this way, the groove wall of the arc groove and the hole wall of the tuning hole 130 are both provided with metal layers, so that the intensity of the attenuation pole outside the passband of the obtained frequency response is higher, and a better technical effect is obtained, which will not be repeated.

[0093] Figures 7 to 18 In the figure, different metallization conditions are listed for different arc slot opening positions and numbers:

[0094] Some arc-shaped grooves have a first side wall with a second metal layer, some arc-shaped grooves have a first bottom wall with a second metal layer, and some arc-shaped grooves have a first side wall and a first bottom wall with a second metal layer;

[0095] Some tuning holes 130 have a third metal layer on their second side walls, some tuning holes 130 have a third metal layer on their second bottom walls, and some tuning holes 130 have a third metal layer on both their second side walls and their second bottom walls.

[0096] Those skilled in the art can make specific settings according to the needs and in combination with the strength of the attenuation pole outside the frequency response passband to be generated, so as to determine which side walls or bottom walls need metal coating and which do not. When there are more metal coatings, the strength of the attenuation pole outside the frequency response passband is higher, which will not be described in detail.

[0097] Please refer to Figures 1 to 6 The dielectric body 100 is further provided with a partition through hole 120 , a third resonant hole 113 and a fourth resonant hole 114 , and the first resonant hole 111 , the second resonant hole 112 , the third resonant hole 113 and the fourth resonant hole 114 are located at the periphery of the partition through hole 120 .

[0098] Of course, the hole walls of the third resonance hole 113 and the hole walls of the fourth resonance hole 114 are also provided with a first metal layer. From the previous analysis, it can be seen that a third resonator and a fourth resonator are formed here. The first resonator, the second resonator, the third resonator and the fourth resonator are spaced apart by the separation through hole 120, which will not be repeated here.

[0099] This embodiment further provides a communication device, comprising the dielectric filter as described in any of the above embodiments.

[0100] The communication device includes the above-mentioned dielectric filter and has good frequency selection characteristics.

[0101] The communication device may be an antenna or a transceiver, etc. The aforementioned dielectric filter is used to improve the frequency selection characteristics during design. The device may be designed and arranged according to actual needs, and will not be described in detail.

[0102] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0103] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A dielectric filter, characterized in that: include: Medium body; The dielectric body is provided with a first resonant hole and a second resonant hole at intervals, and a first metal layer is provided on the surface of the dielectric body, the hole wall of the first resonant hole and the hole wall of the second resonant hole; The dielectric body is further provided with a tuning hole, wherein the tuning hole is located between the first resonant hole and the second resonant hole; and An arc-shaped groove is arranged on the dielectric body and surrounds the tuning hole, and a second metal layer is arranged on the groove wall of the arc-shaped groove.

2. The dielectric filter according to claim 1, characterized in that: The dielectric body has a first side and a second side opposite to each other, the first resonance hole, the second resonance hole and the tuning hole are all arranged on the first side, and the arc-shaped groove is opened on the first side and / or the second side.

3. The dielectric filter according to claim 2, characterized in that: The arc-shaped groove located on the first side is a first groove, and at least two first grooves are arranged at intervals; Or the arc-shaped groove located on the second side is a second groove, and at least two second grooves are arranged at intervals; Or the arc-shaped groove located on the first side is a first groove, the arc-shaped groove located on the second side is a second groove, at least two first grooves are arranged at intervals, and at least two second grooves are arranged at intervals.

4. The dielectric filter according to claim 3, characterized in that: The groove depth of one of the first grooves is different from the groove depth of another of the first grooves; or the groove depth of one of the second grooves is different from the groove depth of another of the second grooves; Or the groove depth of one of the first grooves is different from the groove depth of one of the second grooves.

5. The dielectric filter according to claim 3, characterized in that: The curvature of one of the first grooves is the same as the curvature of another of the first grooves; or the curvature of one of the second grooves is the same as the curvature of another of the second grooves; Or the curvature of one of the first grooves is the same as the curvature of one of the second grooves.

6. The dielectric filter according to claim 3, characterized in that One of the first slots and another of the first slots are respectively located on two opposite sides of the tuning hole; or one of the second grooves and another of the second grooves are respectively located on opposite sides of the tuning hole; Or on a projection plane, the first groove and the second groove are respectively located on two opposite sides of the tuning hole.

7. The dielectric filter according to claim 1, characterized in that: The hole wall of the tuning hole is provided with a third metal layer.

8. The dielectric filter according to claim 7, characterized in that: The groove wall of the arc-shaped groove includes a first side wall and a first bottom wall, and the second metal layer is arranged on the first side wall and / or the first bottom wall; Or / and the hole wall of the tuning hole includes a second side wall and a second bottom wall, and the third metal layer is arranged on the second side wall and / or the second bottom wall.

9. The dielectric filter according to any one of claims 1 to 8, characterized in that: The dielectric body is also provided with a separation through hole, a third resonance hole and a fourth resonance hole. The first resonance hole, the second resonance hole, the third resonance hole and the fourth resonance hole are located at the periphery of the separation through hole.

10. A communication device, characterized in that: Comprising the dielectric filter as described in any one of claims 1-9.

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