Dielectric filters and communication equipment

Abstract

The present invention provides a dielectric filter and communication equipment, relating to the technical field of wireless communications. The dielectric filter comprises: a dielectric body and a plurality of resonant units disposed on the dielectric body. The resonant units comprise resonant through-holes and frequency blind holes, which are interconnected. The radial dimensions of the resonant through-holes differ from those of the frequency blind holes. The resonant units are provided with frequency tuning areas for tuning the frequency of the dielectric filter. The dielectric filter and communication equipment provided by the present invention are compact and lightweight, making them easy to manufacture and further meeting the demand for miniaturization in communications while maintaining high performance.

Description

Technical Field

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

[0002] With the rapid development of communication technology, wireless communication devices are becoming increasingly miniaturized. Furthermore, the requirements for high-sensitivity signal transmission and reception are becoming increasingly stringent, making dielectric filters increasingly important in wireless communications. Compared to conventional cavity resonators, dielectric filters offer advantages such as low loss, low cost, high temperature stability, and excellent harmonic suppression.

[0003] However, the filters currently used in low-frequency band communications are mostly large in size, which makes it difficult to meet the communication needs of wireless communication equipment towards miniaturization. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a dielectric filter and a communication device to alleviate the above technical problems.

[0005] In a first aspect, an embodiment of the present invention provides a dielectric filter, comprising: a dielectric body, and a plurality of resonance units arranged on the dielectric body; wherein the resonance units include a resonance through hole and a frequency blind hole, and the resonance through hole and the frequency blind hole are connected to each other; wherein the radial dimension of the resonance through hole is different from the radial dimension of the frequency blind hole; and a frequency tuning area is provided on the resonance unit for tuning the frequency of the dielectric filter.

[0006] Preferably, in a preferred embodiment, the radial dimension of the resonant through hole is smaller than the radial dimension of the frequency blind hole.

[0007] Preferably, in a preferred embodiment, the above-mentioned dielectric filter also includes a connecting groove arranged between two adjacent resonant units; the connecting groove is arranged at the bottom of the resonant through-hole, and the connecting groove is a hollow groove; wherein the connecting groove is connected to or not connected with the corresponding two resonant through-holes.

[0008] Preferably, in a preferred embodiment, the frequency tuning area includes a first non-electroplating area provided on the resonant through hole, and the first non-electroplating area is provided near a position where the resonant through hole and the frequency blind hole are connected.

[0009] Preferably, in a preferred embodiment, the frequency debugging area includes a second non-electroplated area and / or electroplated area arranged in the frequency blind hole; the second non-electroplated area and / or electroplated area is arranged at the bottom or side wall of the frequency blind hole.

[0010] Preferably, in a preferred embodiment, the above-mentioned dielectric filter also includes input and output ports; the input and output ports include a first port and a second port, wherein the first port and the second port are respectively arranged at positions corresponding to the first and last resonant cavities of a resonant array composed of multiple resonant units.

[0011] Preferably, in a preferred embodiment, the first port and the second port include a blind hole and a third non-electroplated area provided at a preset position of the blind hole; wherein the axial direction of the blind hole extends to the interior of the dielectric body.

[0012] Preferably, in a preferred embodiment, the dielectric filter is further provided with a metallized coating, and the metallized coating is provided on the outer surface of the dielectric body.

[0013] Preferably, in a preferred embodiment, the above-mentioned dielectric filter also includes a frequency adjustment mechanism, which includes a cover and a tuning assembly; the cover is arranged on the upper surface of the dielectric body to shield signal leakage; the tuning assembly is arranged on the cover, and, at a position corresponding to the frequency blind hole, is used to adjust the frequency of the dielectric filter.

[0014] In a second aspect, an embodiment of the present invention further provides a communication device, which is equipped with the dielectric filter described in the first aspect.

[0015] The embodiments of the present invention bring the following beneficial effects:

[0016] The dielectric filter and communication device provided in the embodiments of the present invention can be provided with multiple resonant units on the dielectric body, and the resonant units include resonant through holes and frequency blind holes of different radial sizes, the resonant through holes and the frequency blind holes are connected, and a frequency tuning area is provided on the resonant unit to facilitate tuning the frequency of the dielectric filter, thereby enabling the dielectric filter to achieve the desired performance. The above-mentioned connection between the resonant through holes and the frequency blind holes can effectively reduce the volume and weight of the dielectric body, not only facilitating processing, but also further meeting the communication needs of miniaturization on the basis of achieving performance.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purposes and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic structural diagram of a dielectric filter provided by an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the three-dimensional structure of a dielectric filter provided by an embodiment of the present invention;

[0022] Figure 3 A front view of a dielectric filter provided by an embodiment of the present invention;

[0023] Figure 4 A side view of a dielectric filter provided by an embodiment of the present invention;

[0024] Figure 5 A top view of a dielectric filter provided by an embodiment of the present invention;

[0025] Figure 6 A frequency response diagram of a dielectric filter provided by an embodiment of the present invention;

[0026] Figure 7 A schematic diagram of frequency adjustment of a dielectric filter provided by an embodiment of the present invention;

[0027] Figure 8 A frequency adjustment schematic diagram of another dielectric filter provided by an embodiment of the present invention;

[0028] Figure 9 A schematic diagram of frequency adjustment of another dielectric filter provided by an embodiment of the present invention.

[0029] Icons: 100- dielectric body; 101- resonant through hole; 102- frequency blind hole; 103- connection slot; 104- first non-electroplating area; 105- second non-electroplating area; 106- electroplating area; 107- first port; 108- second port; 109- blind hole; 110- third non-electroplating area; 701- metal cover; 702- adjusting screw; 703- nut; 801- hollow area; 802- frequency adjustment plate; 901- deformable part; 902- debugging area. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the scope of protection of the present invention.

[0031] With the rapid development of communication technology, wireless communication devices are increasingly miniaturized. However, filters currently used in low-frequency communication are generally large. Therefore, it is extremely important to seek a filter that is small, lightweight, has excellent performance, and is low-cost. Based on this, the embodiments of the present invention provide a dielectric filter and communication device that can improve the large size of filters commonly found in existing technologies.

[0032] To facilitate understanding of this embodiment, a dielectric filter disclosed in an embodiment of the present invention is first introduced in detail.

[0033] In one possible implementation, an embodiment of the present invention provides a dielectric filter. Specifically, the dielectric filter provided by the embodiment of the present invention includes: a dielectric body, and a plurality of resonance units arranged on the dielectric body; wherein the resonance units include resonance through holes and frequency blind holes, and the resonance through holes and the frequency blind holes are connected; wherein the radial dimensions of the resonance through holes are different from the radial dimensions of the frequency blind holes, and a frequency tuning area is provided on the resonance units for tuning the frequency of the dielectric filter.

[0034] Specifically, for ease of understanding, Figure 1 A schematic diagram of the structure of a dielectric filter is shown in FIG. Figure 1 As shown, it includes a dielectric body 100, and is described by taking five resonance units provided on the dielectric body 100 as an example, and the five resonance units are arranged in sequence inside the dielectric body to form a resonance array.

[0035] in, Figure 1 The direction indicated by the Y axis is the longitudinal direction of the dielectric body. The positive direction along the longitudinal direction is the direction indicated by the Y arrow. In this direction, the resonant through hole 101 and the frequency blind hole 102 are arranged in sequence, and the resonant through hole 101 and the frequency blind hole 102 are connected to each other.

[0036] Specifically, since the resonance through hole 101 is in the form of a through hole and the frequency blind hole 102 is in the form of a blind hole, the resonant cavity of each resonant unit is a cavity structure formed by dividing the medium body by the resonance through hole and the frequency blind hole, and the top of the resonance through hole is connected to the bottom of the frequency blind hole, and the frequency debugging area is mostly set at the bottom of the frequency blind hole to facilitate frequency debugging through later polishing.

[0037] In actual use, the above-mentioned resonant through hole and frequency blind hole can be circular, square or any other shape. Furthermore, Figure 1 In the embodiment, including 5 resonance units, it is only a possible exemplary embodiment. In other embodiments, the number of resonance units can be set according to actual use, and the embodiment of the present invention does not limit this.

[0038] The dielectric filter provided in an embodiment of the present invention can be provided with multiple resonant units on a dielectric body. The resonant units include resonant through holes and frequency blind holes of different radial sizes. The resonant through holes and the frequency blind holes are interconnected. A frequency tuning area is provided on the resonant units to facilitate tuning the frequency of the dielectric filter, thereby enabling the dielectric filter to achieve the desired performance. The above-mentioned connection between the resonant through holes and the frequency blind holes can effectively reduce the volume and weight of the dielectric body, not only facilitating processing, but also further meeting the communication needs of miniaturization on the basis of achieving performance.

[0039] In actual use, the radial size of the resonant through hole is usually designed to be smaller than the radial size of the frequency blind hole. Specifically, Figure 2 A schematic diagram of the three-dimensional structure of a dielectric filter is shown in FIG. Figure 2 As shown, the dielectric body is also provided with 5 resonance units as an example for description, and the radial dimension of the resonance through hole is designed to be smaller than the radial dimension of the frequency blind hole.

[0040] in, Figure 2 The resonant through hole 101 and the frequency blind hole 102 are included. Further, the dielectric filter provided by the embodiment of the present invention further includes a connecting groove provided between two adjacent resonant units; Figure 2 The connecting slot 103 shown is arranged at the bottom of the resonant through hole, and is a hollow slot; wherein the connecting slot 103 is connected to or not connected with the corresponding two resonant through holes.

[0041] Specifically, Figure 2 In the figure, it is shown that the connecting grooves are respectively connected to the bottoms of two adjacent resonant through holes. In other embodiments, the connecting grooves can be set to be disconnected from the resonant through holes according to the frequency adjustment requirements, that is, the connecting grooves are only set between the resonant through holes at both ends, and do not contact the resonant through holes.

[0042] Furthermore, the shape of the connection groove can be square or circular, and the aperture size of the connection groove can also be set to the same size or different sizes according to requirements, that is, Figure 2In the embodiment, the aperture size of the connecting grooves on both sides is larger than the aperture size of the connecting groove in the middle. In other embodiments, the specific setting form of the connecting grooves can also be set according to actual usage conditions, and the embodiments of the present invention do not limit this.

[0043] Furthermore, the frequency tuning area for tuning the frequency of the dielectric filter includes a first non-electroplating area provided on the resonant through hole, and the first non-electroplating area is provided near the position where the resonant through hole and the frequency blind hole are connected. Figure 2 On the basis of Figure 3 Shows a front view of a dielectric filter, except Figure 2 The resonant through hole 101 , the frequency blind hole 102 and the connecting groove 103 are shown, and the first non-electroplating area 104 is also shown.

[0044] Furthermore, in addition to the first non-electroplating area 104, the frequency debugging area includes a second non-electroplating area and / or electroplating area arranged at the frequency blind hole; the second non-electroplating area and / or electroplating area is arranged at the bottom or side wall of the frequency blind hole, specifically, as Figure 2 The bottom of the frequency blind hole 102 is provided with a second non-electroplating area 105 and an electroplating area 106, wherein, Figure 2 What is shown is an implementation manner in which the frequency blind hole includes both a second non-electroplated area 105 and an electroplated area 106, and the second non-electroplated area 105 and the electroplated area 106 are circular or annular. In other implementation manners, the second non-electroplated area 105 and the electroplated area 106 can also be any other shape, and the second non-electroplated area 105 can also be first set as an electroplated area, and then the electroplated layer is polished later to perform frequency debugging on the dielectric filter.

[0045] Specifically, when tuning the frequency of the dielectric filter through the frequency tuning area, the frequency adjustment method can be achieved by polishing the electroplated area and the second non-electroplated area at the bottom or sidewall of the frequency blind hole. After the tuning is completed, a layer of tin foil or a metal cover can be attached to the surface of the frequency blind hole to shield signal leakage. In actual use, the location and shape of the second non-electroplated area 105 and the electroplated area 106 can be set according to actual use, and this embodiment of the present invention is not limited to this.

[0046] In addition, the dielectric filter provided by the embodiment of the present invention further includes an input and output port; specifically, the input and output port includes a first port and a second port, such as Figure 2The first port 107 and the second port 108 are shown, wherein the first port 107 and the second port 108 are respectively arranged at positions corresponding to the first and last resonant cavities of a resonant array composed of a plurality of resonant units, that is, the first port and the second port included in the input and output ports are arranged at positions corresponding to the resonant cavities of the first and last resonant units of the resonant array.

[0047] In summary, the dielectric filter provided in the embodiment of the present invention is actually a new type of dielectric filter. By setting a resonant through hole on the dielectric body, the dielectric body is divided into multiple resonant cavities, and a first non-electroplated area 104 is set at the top part of the resonant through hole. Adjacent resonant units are coupled and adjusted through a connecting groove set at the bottom, wherein the connecting groove can be set in the form of a blind groove.

[0048] Furthermore, a frequency blind hole is provided at the top of the resonant through hole of each resonant unit, and a second non-electroplated area 105 and an electroplated area 106 are provided at the bottom of the frequency blind hole. In this way, the frequency of each resonant unit is adjusted, and an input and output port is provided at the head and tail cavity parts respectively, i.e., a first port 107 and a second port 108, thereby constituting a new type of miniaturized dielectric filter suitable for low frequency bands.

[0049] Further, if Figure 2 As shown, the first port and the second port include a blind hole 109 and a third non-electroplating area 110 arranged at a preset position of the blind hole; wherein, Figure 2 In the embodiment, the axial direction of the blind hole extends into the interior of the dielectric body. In other embodiments, the axial direction of the blind hole can be set according to actual usage, and the embodiment of the present invention is not limited to this. Specifically, the third non-electroplated area 110 is disposed around the blind hole 109, and the shapes of the blind hole 109 and the third non-electroplated area 110 can be circular, elliptical, square, or any other shape, and the embodiment of the present invention is not limited to this.

[0050] Further, in Figure 2 On the basis of Figure 4 A side view of a dielectric filter is shown, including a resonant through hole 101, a frequency blind hole 102, a first non-electroplated area 104 arranged near the position where the resonant through hole and the frequency blind hole are connected, and one of the input and output ports (the first port 107 or the second port 108).

[0051] Figure 5 A top view of the dielectric filter is also shown, wherein the dielectric filter shown in the above drawings in the embodiment of the present invention is described by taking the dielectric body as an example in which five resonant units are provided, and, Figure 6 Also shown is a frequency response diagram of a dielectric filter including five resonant units.

[0052] It should be understood that the dielectric filter provided in the embodiment of the present invention is not limited to the implementation method including 5 resonant units shown in the above-mentioned figures. In other embodiments, the number of resonant units, as well as the shape or parameters of structures such as the connecting grooves, non-electroplated areas and electroplated areas, can be set in other ways, which shall be based on actual usage and is not limited by the embodiment of the present invention.

[0053] In addition, the dielectric filter is further provided with a metallized coating, which is provided on the outer surface of the dielectric body.

[0054] In actual use, the dielectric filter provided by the embodiment of the present invention further includes a frequency adjustment mechanism, which includes a cover plate and a tuning assembly; wherein the cover plate is arranged on the upper surface of the dielectric body to shield signal leakage, that is, Figure 1 The tuning component is arranged on the cover plate on the upper surface of the dielectric body in the direction indicated by the Y axis, and is used to adjust the frequency of the dielectric filter at a position corresponding to the frequency blind hole.

[0055] Specifically, the frequency adjustment mechanism usually fine-tunes the frequency of the dielectric filter when the dielectric filter is in use, which is different from the tuning method of the frequency debugging area set on the aforementioned resonant unit. The aforementioned frequency debugging area usually adjusts the frequency by polishing the electroplated area or the non-electroplated area during the design stage of the dielectric filter, while the frequency adjustment mechanism fine-tunes the frequency during the use stage of the dielectric filter based on the completion of the polishing of the frequency debugging area.

[0056] In actual use, the above tuning component can be a screw component. For ease of understanding, Figure 7 A frequency adjustment diagram of a dielectric filter is shown. Figure 7 As shown, taking the frequency adjustment mechanism cover as a metal cover as an example, that is, Figure 7 The metal cover plate 701 is welded to the upper surface of the dielectric body, and an adjusting screw 702 is placed at each corresponding frequency blind hole position on the metal cover plate 701 for frequency adjustment. The adjusting screw 702 is fixed by a nut 703. The metal cover plate 701 can be split into multiple small cover plates according to needs, and the shape can be round, square or any other shape.

[0057] Furthermore, the above tuning component can also be a frequency adjustment piece, specifically, Figure 8 Another frequency adjustment diagram of a dielectric filter is shown in FIG. Figure 8As shown, the metal cover 701 is also welded to the upper surface of the dielectric body for debugging. At this time, the metal cover 701 includes a hollow area 801 and a frequency adjustment plate 802 extending from the hollow area. The hollow area 801 and the frequency adjustment plate 802 are both above the frequency blind hole area. During debugging, the frequency adjustment plate 802 is adjusted by adjusting the depth of the frequency blind hole. The hollow area and the frequency adjustment plate can be square, circular or any other shape. After debugging is completed, the above-mentioned metal cover can be attached and welded on the upper surface for signal shielding. The metal cover can also be split into a combination of many small cover plates, which can be circular, square or any other shape.

[0058] In addition, the above tuning component can also be a deformable component, which is arranged at the opening of the frequency blind hole to form a deformable component, thereby achieving frequency adjustment. Specifically, Figure 9 A schematic diagram of frequency adjustment for another dielectric filter is shown. Similarly, a metal cover plate 701 is welded to the upper surface of the dielectric body for adjustment. In this case, a deformable member 901 is positioned above the frequency blind hole region. Adjustment is performed by squeezing or otherwise manipulating the adjustment region 902 to deform the region. Deformable member 901 can be wavy, stepped, or other forms, and adjustment region 902 can be circular, square, or other shapes. The specific adjustment method and form of the tuning component can be configured based on actual use. Furthermore, in addition to the metal cover plate, the cover plate can also be configured in the form of tinfoil. This configuration can also be tailored to actual use, and the present invention is not limited thereto.

[0059] In summary, the dielectric filter provided in the embodiment of the present invention can realize a miniaturized dielectric filter in the low-frequency band. The required performance can be achieved by making certain settings and adjustments on a small piece of dielectric body. At the same time, the above-mentioned new dielectric filter has the characteristics of simple adjustment, convenient processing, and flexible operation, which provides a new direction for the miniaturization development of current low-frequency band dielectric filters.

[0060] Furthermore, based on the dielectric filter provided in the above embodiment, an embodiment of the present invention further provides a communication device, which is equipped with the above dielectric filter.

[0061] The communication device provided in the embodiment of the present invention has the same technical features as the dielectric filter provided in the above embodiment, and therefore can also solve the same technical problems and achieve the same technical effects.

[0062] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the communication device described above can refer to the corresponding process in the aforementioned embodiment and will not be repeated here.

[0063] In addition, in the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0064] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0065] Finally, it should be noted that the above embodiments are only specific implementation methods of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. Such modifications, changes or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A dielectric filter, characterized in that: include: A dielectric body, and a plurality of resonant units arranged on the dielectric body; The resonance unit includes a frequency blind hole and a resonance through hole, and the resonance through hole and the frequency blind hole are connected; Wherein, the radial dimension of the resonant through hole is different from the radial dimension of the frequency blind hole; The resonance unit is provided with a frequency tuning area for tuning the frequency of the dielectric filter; The dielectric filter further includes a connecting groove provided between two adjacent resonant units; the connecting groove is provided at the bottom of the resonant through hole, and the connecting groove is a hollow groove; Wherein, the connecting groove is connected with the corresponding two resonant through holes or is not connected; The frequency tuning area includes a first non-electroplating area provided on the resonant through hole, wherein the first non-electroplating area is provided near a position where the resonant through hole and the frequency blind hole are connected; The frequency debugging area includes a second non-electroplating area and / or electroplating area arranged on the frequency blind hole; the second non-electroplating area and / or electroplating area is arranged on the bottom or side wall of the frequency blind hole.

2. The dielectric filter according to claim 1, wherein The radial dimension of the resonant through hole is smaller than the radial dimension of the frequency blind hole.

3. The dielectric filter according to claim 1, wherein The dielectric filter also includes input and output ports; The input and output ports include a first port and a second port, wherein the first port and the second port are respectively arranged at positions corresponding to the first and last two resonance units of a resonance array composed of a plurality of resonance units.

4. The dielectric filter according to claim 3, wherein The first port and the second port include a blind hole and a third non-electroplating area arranged at a preset position of the blind hole; The axial direction of the blind hole extends to the interior of the dielectric body.

5. The dielectric filter according to any one of claims 1 to 4, characterized in that: The dielectric filter is further provided with a metallized coating, and the metallized coating is provided on the outer surface of the dielectric body.

6. The dielectric filter according to claim 1, wherein The dielectric filter further comprises a frequency adjustment mechanism, which comprises a cover plate and a tuning assembly; The cover plate is arranged on the upper surface of the dielectric body and is used to shield signal leakage; The tuning component is arranged on the cover plate at a position corresponding to the frequency blind hole, and is used to adjust the frequency of the dielectric filter.

7. A communication device, characterized in that: The communication device is equipped with the dielectric filter according to any one of claims 1 to 6.

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