CN210142706U - Duplexer, dielectric filter and capacitive coupling structure thereof - Google Patents
Duplexer, dielectric filter and capacitive coupling structure thereof Download PDFInfo
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- CN210142706U CN210142706U CN201921406462.8U CN201921406462U CN210142706U CN 210142706 U CN210142706 U CN 210142706U CN 201921406462 U CN201921406462 U CN 201921406462U CN 210142706 U CN210142706 U CN 210142706U
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Abstract
The utility model discloses a duplexer, dielectric filter and capacitive coupling structure thereof, capacitive coupling structure including locate in the medium body between two adjacent medium syntonizers, according to the first adjustment tank of presetting length and presetting degree of depth setting, the one end of first adjustment tank with a lateral wall interval of medium body sets up, the other end of first adjustment tank with another lateral wall intercommunication of medium body or the other end and the isolated window intercommunication of first adjustment tank. The capacitive coupling structure is low in production difficulty and convenient for subsequent production debugging; therefore, the dielectric filter adopting the capacitive coupling structure has low production difficulty and low production and debugging difficulty; therefore, the duplexer adopting the dielectric filter has low production difficulty and low production and debugging difficulty.
Description
Technical Field
The utility model relates to a wave filter technical field, concretely relates to duplexer, dielectric filter and capacitive coupling structure thereof.
Background
With the rapid development of communication technology, communication devices are increasingly miniaturized in order to meet the use requirements. Dielectric filters have been widely used in communication devices because of their small size.
In order to achieve good loss and suppression effects, the dielectric filter usually achieves better performance and smaller size by increasing cross coupling, and therefore, a capacitive coupling structure is required to be arranged on the dielectric filter. In order to achieve the purpose of capacitive coupling, in a conventional method, a deep hole is usually arranged between two adjacent dielectric resonators in a dielectric body, and a capacitive coupling bandwidth is adjusted by adjusting a distance between a bottom wall of the deep hole and a lower surface of the dielectric body, wherein the smaller the distance between the bottom wall of the deep hole and the lower surface of the dielectric body is, the smaller the capacitive coupling bandwidth is, in order to achieve the small capacitive coupling bandwidth, the smaller the distance between the bottom wall of the deep hole and the lower surface of the dielectric body needs to be, and in a sintering process in a production process, the sintering molding is not facilitated, the production difficulty is increased, and the subsequent production debugging is also not facilitated.
SUMMERY OF THE UTILITY MODEL
Based on the technical scheme, the duplexer, the dielectric filter and the capacitive coupling structure are provided, and the capacitive coupling structure is low in production difficulty and convenient for subsequent production debugging; therefore, the dielectric filter adopting the capacitive coupling structure has low production difficulty and low production and debugging difficulty; therefore, the duplexer adopting the dielectric filter has low production difficulty and low production and debugging difficulty.
The technical scheme is as follows:
on one hand, the capacitive coupling structure of the dielectric filter comprises a first adjusting groove which is arranged between two adjacent dielectric resonators in a dielectric body and is arranged according to a first preset length and a preset depth, one end of the first adjusting groove is arranged at a distance from one side wall of the dielectric body, and the other end of the first adjusting groove is communicated with the other side wall of the dielectric body or the other end of the first adjusting groove is communicated with an isolation window.
According to the capacitive coupling structure of the dielectric filter, the first adjusting groove with the preset depth is flexibly arranged between two adjacent dielectric resonators of the dielectric body according to the first preset length, so that one end of the first adjusting groove is arranged at an interval with one side wall of the dielectric body, the other end of the first adjusting groove is communicated with the other side wall of the dielectric body, namely the first adjusting groove extends to the other side wall of the dielectric body, or the other end of the first adjusting groove is communicated with the isolation window. Compared with the traditional blind hole mode, the capacitive coupling structure of the dielectric filter does not need to adjust the depth of the first adjusting groove independently in order to realize small capacitive coupling bandwidth, improves the flexibility of design, reduces the production difficulty, is convenient for batch production and is also convenient for subsequent production debugging; meanwhile, the capacitive coupling filter can achieve quite wide capacitive coupling bandwidth, is good in consistency and performance, saves production cost and facilitates control of different zero points of the dielectric filter.
The technical solution is further explained below:
in one embodiment, a second adjusting groove is formed in the bottom wall of the first adjusting groove according to a second preset length, the second adjusting groove penetrates through the medium body, and one end of the second adjusting groove is communicated with the other side wall of the medium body or one end of the second adjusting groove is communicated with the isolating window. Therefore, the capacitive coupling bandwidth can be further flexibly adjusted by arranging the second adjusting groove.
In one embodiment, the length of the second adjusting groove is W1And W is1Is adjustable. Therefore, the capacitive coupling bandwidth can be further flexibly adjusted by adjusting the length of the second adjusting groove.
In one embodiment, the side wall of the other end of the second adjusting groove is provided with a first arc segment, and/or the side wall of one end of the first adjusting groove is provided with a second arc segment. So, be convenient for process first adjustment tank and second adjustment tank.
In one embodiment, the length of the first adjusting groove is W2And W is2The depth of the first adjusting groove is adjustable, and/or the depth of the first adjusting groove is H, and H is adjustable. Therefore, the adjusting mode is flexible, the structure is simple and convenient, and the processing is convenient.
In one embodiment, the dielectric body includes at least three dielectric resonators arranged in parallel, the first adjusting groove is arranged between two adjacent dielectric resonators, one end of the first adjusting groove is arranged at a distance from one sidewall of the dielectric body, and the other end of the first adjusting groove is communicated with the other sidewall of the dielectric body.
In one embodiment, the dielectric resonator is provided with an adjustment hole for adjusting the frequency. Thus, the frequency can be adjusted according to actual needs.
In one embodiment, the dielectric body includes four dielectric resonators, the four dielectric resonators are arranged in two rows and two columns, an isolation window for isolating the four dielectric resonators is arranged on the dielectric body, the first adjusting groove is arranged between two adjacent dielectric resonators, one end of the first adjusting groove is arranged at an interval with one side wall of the dielectric body, and the other end of the first adjusting groove is communicated with the isolation window.
In another aspect, a dielectric filter is provided, comprising the capacitive coupling structure.
According to the dielectric filter, the first adjusting groove with the preset depth is flexibly arranged between two adjacent dielectric resonators of the dielectric body according to the first preset length, so that one end of the first adjusting groove is arranged at an interval with one side wall of the dielectric body, the other end of the first adjusting groove is communicated with the other side wall of the dielectric body, namely the first adjusting groove extends to the other side wall of the dielectric body, or the other end of the first adjusting groove is communicated with the isolation window. Compared with the traditional blind hole mode, the depth of the first adjusting groove does not need to be adjusted independently in order to realize small capacitive coupling bandwidth, so that the flexibility of design is improved, the production difficulty is reduced, the mass production is facilitated, and the subsequent production debugging is also facilitated; meanwhile, the capacitive coupling filter can achieve quite wide capacitive coupling bandwidth, is good in consistency and performance, saves production cost and facilitates control of different zero points of the dielectric filter.
In still another aspect, a duplexer including the dielectric filter is provided.
Above-mentioned duplexer, according to the nimble first adjustment tank of seting up out the default depth of first default length between two adjacent dielectric resonator of dielectric body for the one end of first adjustment tank sets up with a lateral wall interval of dielectric body, and the other end of first adjustment tank communicates with another lateral wall of dielectric body, and first adjustment tank extends to another lateral wall of dielectric body promptly, or the other end and the isolated window intercommunication of first adjustment tank. Compared with the traditional blind hole mode, the depth of the first adjusting groove does not need to be adjusted independently in order to realize small capacitive coupling bandwidth, so that the flexibility of design is improved, the production difficulty is reduced, the mass production is facilitated, and the subsequent production debugging is also facilitated; meanwhile, the capacitive coupling filter can achieve quite wide capacitive coupling bandwidth, is good in consistency and performance, saves production cost and facilitates control of different zero points of the dielectric filter.
Drawings
Fig. 1 is a schematic structural view of a first surface of a capacitive coupling structure of a dielectric filter of an embodiment;
fig. 2 is a cross-sectional view of a portion a-a of the capacitive coupling structure of the dielectric filter of fig. 1;
figure 3 is a schematic diagram of a second surface of the capacitive coupling structure of the dielectric filter of figure 1;
fig. 4 is a cross-sectional view of a portion B-B of the capacitive coupling structure of the dielectric filter of fig. 3;
fig. 5 is a schematic structural view of a first surface of a capacitive coupling structure of a dielectric filter of another embodiment;
figure 6 is a cross-sectional view of a portion C-C of the capacitive coupling structure of the dielectric filter of figure 5;
figure 7 is a schematic diagram of a second surface of the capacitive coupling structure of the dielectric filter of figure 5;
figure 8 is a cross-sectional view of a portion D-D of the capacitive coupling structure of the dielectric filter of figure 7;
fig. 9 is a schematic structural view of a dielectric body of a capacitive coupling structure of a dielectric filter of an embodiment;
FIG. 10 shows W of a capacitive coupling structure of a dielectric filter according to an embodiment2A plot of capacitively coupled bandwidth;
FIG. 11 is a W of a capacitive coupling structure of a dielectric filter of another embodiment2A plot of capacitively coupled bandwidth;
figure 12 is a plot of H versus capacitive coupling bandwidth for the capacitive coupling structure of the dielectric filter of one embodiment;
FIG. 13 shows W of a capacitive coupling structure of a dielectric filter according to an embodiment1Graph of the relationship with the capacitive coupling bandwidth.
Description of reference numerals:
100. the dielectric resonator comprises a dielectric body, 110, an isolation window, 120, a first adjusting groove, 121, a second arc section, 130, a second adjusting groove, 131, a first arc section, 140, a first surface, 150, a second surface, 200, a conducting layer, 1000, a dielectric resonator, 1100 and an adjusting hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and the following detailed description. It should be understood that the detailed description and specific examples, while indicating the scope of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
It will be understood that when an element is referred to as being "disposed on," "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured" to, or "fixedly coupled" to another element, it can be removably secured or non-removably secured to the other element. When an element is referred to as being "connected," "pivotally connected," to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," "up," "down," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the present invention, the terms "first", "second", "third", and the like do not denote any particular quantity or order, but rather are used to distinguish one name from another.
As shown in fig. 1 to 4, in one embodiment, a capacitive coupling structure of a dielectric filter is disclosed, which includes a first adjustment groove 120 disposed between two adjacent dielectric resonators 1000 in a dielectric body 100 and disposed according to a first predetermined length and a predetermined depth, one end of the first adjustment groove 120 is disposed at a distance from one sidewall of the dielectric body 100, and the other end of the first adjustment groove 120 is communicated with the other sidewall of the dielectric body 100 or the other end of the first adjustment groove 120 is communicated with an isolation window 110.
In the capacitive coupling structure of the dielectric filter according to the above embodiment, the first adjustment groove 120 with a predetermined depth is flexibly formed between two adjacent dielectric resonators 1000 of the dielectric body 100 according to a first predetermined length, such that one end of the first adjustment groove 120 is spaced apart from one sidewall of the dielectric body 100, and the other end of the first adjustment groove 120 is communicated with the other sidewall of the dielectric body 100, that is, the first adjustment groove 120 extends to the other sidewall of the dielectric body 100, or the other end of the first adjustment groove 120 is communicated with the isolation window 110. In the capacitive coupling structure of the dielectric filter in the embodiment, the opening depth of the first adjusting groove 120 and the length of the first adjusting groove 120 are flexibly adjusted, so that the capacitive coupling bandwidth can be flexibly adjusted, and compared with the traditional blind hole mode, in order to realize small capacitive coupling bandwidth, the depth of the first adjusting groove 120 is not required to be independently adjusted, so that the design flexibility is improved, the production difficulty is reduced, the mass production is facilitated, and the subsequent production debugging is also facilitated; meanwhile, the capacitive coupling filter can achieve quite wide capacitive coupling bandwidth, is good in consistency and performance, saves production cost and facilitates control of different zero points of the dielectric filter.
It should be noted that one sidewall of the first adjustment groove 120 and the other sidewall of the dielectric body 100 refer to two different sidewalls of the dielectric body, for example, two sidewalls disposed at an opposite interval.
In one embodiment, the depth of the first adjustment groove 120 is H, and H is adjustable. The depth of the first adjusting groove 120 can be flexibly adjusted according to actual use requirements, and the capacitive coupling bandwidth can be flexibly adjusted only by changing the depth of the first adjusting groove 120.
In one embodiment, the first adjustment slot 120 has a length W2And W is2Is adjustable. The length of the first adjusting groove 120 can be flexibly adjusted according to actual use requirements, and the capacitive coupling bandwidth can be flexibly adjusted only by changing the length of the first adjusting groove 120.
It should be noted that, the degree of depth of first adjustment tank 120 and the length of first adjustment tank 120 can be adjusted simultaneously, also can adjust respectively, preferably adjusts simultaneously, compares traditional blind hole form, adjusts the flexibility that can improve the design simultaneously, reduces the production degree of difficulty, is convenient for debug. The first adjusting groove 120 is preferably in a strip shape or a straight shape, so that the processing is convenient, and the length of the first adjusting groove 120 is also convenient to adjust; of course, the first adjustment groove 120 may also be an arc shape, and it is only necessary to adjust the length and depth of the first adjustment groove 120 to adjust the capacitive coupling bandwidth.
As shown in fig. 1 to 3, in one embodiment, a second adjustment groove 130 is formed at a bottom wall of one end of the first adjustment groove 120 by a second predetermined length, the second adjustment groove 130 penetrates through the medium body 100, and one end of the second adjustment groove 130 communicates with the other side wall of the medium body 100 or one end of the second adjustment groove 130 communicates with the isolation window 110. Thus, the second adjusting groove 130 is further simply and conveniently provided on the bottom wall of the first adjusting groove 120 according to the second preset length, and the capacitive coupling bandwidth is further adjusted by changing the length of the second adjusting groove 130, so that the flexibility of adjustment is further enhanced.
Further, the second adjustment groove 130 has a length W1And W is1Is adjustable. Thus, the second preset length can be flexibly adjusted according to actual use requirements, and the capacitive coupling bandwidth can be flexibly adjusted only by changing the length of the second adjusting groove 130. The contour shape of the second adjusting groove 130 may be an arc shape, or a straight line shape or a strip shape, and it is only necessary to adjust the length of the second adjusting groove 130 so as to adjust the capacitive coupling bandwidth accordingly.
As shown in fig. 1, further, a sidewall of the other end of the second regulating groove 130 is provided as a first circular arc segment 131. So, be convenient for process out second adjustment tank 130 on the diapire of first adjustment tank 120, further reduced the production degree of difficulty. Of course, in other embodiments, the sidewall of the other end of the second adjustment slot 130 may also be provided as a right-angle transition section, so long as the length of the second adjustment slot 130 is adjusted, so as to adjust the capacitive coupling bandwidth.
As shown in fig. 3, on the basis of any of the above embodiments, the side wall of one end of the first adjustment groove 120 is provided as the second circular arc segment 121. Therefore, the first adjusting groove 120 can be conveniently machined on the medium body 100, and the production difficulty is further reduced. Of course, in other embodiments, the sidewall of one end of the first adjustment groove 120 may also be provided as a right-angle transition section, so long as the length and depth of the first adjustment groove 120 are adjusted, thereby adjusting the capacitive coupling bandwidth.
In any of the above embodiments, the dielectric body 100 is integrally formed by using a high-k material. Thus, the dielectric body 100 is integrally formed by high-dielectric-constant materials such as ceramic dielectric, which not only can play a role of transmitting signals, but also can play a role of structural support. When the ceramic dielectric material is adopted, the dielectric body 100 can be manufactured in a die-casting molding mode, and the size and the weight of the whole dielectric waveguide filter can be obviously reduced.
As shown in fig. 1 and 4, in any of the above embodiments, the dielectric resonator 1000 is provided with an adjustment hole 1100 for adjusting the frequency. In this manner, the frequency can be adjusted accordingly using the adjustment aperture 1100. The depth of the adjusting hole 1100 can be adjusted correspondingly according to the frequency of actual needs, and only the actual use needs need to be met.
As shown in fig. 1-4, in one embodiment, the media body 100 includes a first surface 140 and a second surface 150 disposed in spaced relation to one another, the first surface 140 is provided with an adjustment aperture 1100, and the first adjustment slot 120 is disposed in the first surface 140. Thus, the adjusting holes 1100 and the first adjusting grooves 120 are arranged on the first surface 140, so that the adjusting holes 1100 and the first adjusting grooves 120 can be rapidly machined on one plane without turning the medium body 100 in the machining process, the process is saved, and the machining efficiency is improved. Of course, in other embodiments, as shown in fig. 5 to 8, after the adjusting hole 1100 is disposed on the first surface 140, the first adjusting groove 120 may be disposed on the second surface 150, and the capacitive coupling bandwidth may be flexibly adjusted by only adjusting the length and the depth of the first adjusting groove 120.
As shown in fig. 2 to 4 and 5 to 8, in order to realize a narrow capacitive coupling bandwidth and reduce the manufacturing difficulty, so that the design and processing are simple and the assembly is easy, the length of the second adjustment groove 130 (in W)1Shown), the length of the first adjustment slot 120 (in W)2Denoted by H) and depth (denoted by H), and the distance (denoted by W) between the other end of the first adjustment groove 120 and the sidewall of the media body 1003And the debugging device and the debugging method have the advantages that the debugging can be flexibly adjusted according to actual requirements, so that the debugging can be repeatedly carried out, and the design and debugging difficulty is reduced.
As shown in figure 10 of the drawings,in one embodiment, the length W of the second adjustment slot 1301The depth H of the first adjustment groove 120 is 0.7mm, and the distance W between the other end of the first adjustment groove 120 and the sidewall of the dielectric body 100 is 0mm32mm, by changing the length of the first adjustment groove 120, i.e. adjusting W2Can be adjusted accordingly to the capacitive coupling bandwidth, wherein W2The larger the capacitive coupling bandwidth.
As shown in FIG. 11, in one embodiment, the length W of the second adjustment slot 1301The depth H of the first adjustment groove 120 is 2mm, and the distance W between the other end of the first adjustment groove 120 and the sidewall of the dielectric body 100 is 0mm32mm, by changing the length of the first adjustment groove 120, i.e. adjusting W2Can be adjusted accordingly to the capacitive coupling bandwidth, wherein W2The larger the capacitive coupling bandwidth.
As shown in FIG. 12, in one embodiment, the length W of the second adjustment slot 13010mm, the length W of the first adjustment groove 1202Distance W between the other end of the first regulating groove 120 and the side wall of the dielectric body 100 of 9mm3By changing the depth of the first adjustment groove 120, i.e., adjusting the size of H, 2mm, the capacitive coupling bandwidth can be adjusted accordingly, wherein the smaller H, the smaller the capacitive coupling bandwidth.
As shown in FIG. 13, in one embodiment, the length W of the first adjustment slot 1202The depth H of the first adjustment groove 120 is 0.7mm, 9mm, and the distance W between the other end of the first adjustment groove 120 and the sidewall of the dielectric body 10032mm, by changing the length of the second adjustment groove 130, i.e. adjusting W1Can be adjusted accordingly to the capacitive coupling bandwidth, wherein W1The smaller the capacitive coupling bandwidth.
As shown in fig. 9, in one embodiment, the dielectric body 100 includes at least three dielectric resonators 1000 arranged in parallel, a first adjustment groove 120 is disposed between two adjacent dielectric resonators 1000, one end of the first adjustment groove 120 is spaced apart from one sidewall of the dielectric body 100, and the other end of the first adjustment groove 120 is communicated with the other sidewall of the dielectric body 100. In this way, the dielectric resonator 1000 of the dielectric body 100 is arranged in a linear shape, which facilitates the processing and the subsequent adjustment of the depth or length of the first adjustment groove 120.
In one embodiment, the dielectric body 100 includes three dielectric resonators 1000 arranged in parallel, a first adjustment groove 120 is arranged between the first dielectric resonator 1000 and the second dielectric resonator 1000, one end of the first adjustment groove 120 is arranged at a distance from one sidewall of the dielectric body 100, and the other end of the first adjustment groove 120 is communicated with the other sidewall of the dielectric body 100; a first adjusting groove 120 is arranged between the second dielectric resonator 1000 and the third dielectric resonator 1000, one end of the first adjusting groove 120 is arranged at an interval with one sidewall of the dielectric body 100, the other end of the first adjusting groove 120 is communicated with the other sidewall of the dielectric body 100, and a second adjusting groove 130 is arranged on the bottom wall of the other end of the first adjusting groove 120.
In one embodiment, the dielectric body 100 includes four dielectric resonators 1000 arranged in parallel, a first adjustment groove 120 is arranged between a first dielectric resonator 1000 and a second dielectric resonator 1000, one end of the first adjustment groove 120 is arranged at a distance from one sidewall of the dielectric body 100, and the other end of the first adjustment groove 120 is communicated with the other sidewall of the dielectric body 100; a first adjusting groove 120 is arranged between the second dielectric resonator 1000 and the third dielectric resonator 1000, one end of the first adjusting groove 120 is arranged at a distance from one side wall of the dielectric body 100, the other end of the first adjusting groove 120 is communicated with the other side wall of the dielectric body 100, and a second adjusting groove 130 is arranged on the bottom wall of the other end of the first adjusting groove 120; a first adjusting groove 120 is arranged between the third dielectric resonator 1000 and the fourth dielectric resonator 1000, one end of the first adjusting groove 120 is arranged at an interval with one sidewall of the dielectric body 100, and the other end of the first adjusting groove 120 is communicated with the other sidewall of the dielectric body 100.
As shown in fig. 1 to 8, in an embodiment, the dielectric body 100 includes four dielectric resonators 1000, the four dielectric resonators 1000 are arranged in two rows and two columns, an isolation window 110 for isolating the four dielectric resonators is disposed on the dielectric body 100, a first adjustment groove 120 is disposed between two adjacent dielectric resonators 1000, one end of the first adjustment groove 120 is disposed at an interval with a side wall of the dielectric body 100, and the other end of the first adjustment groove 120 is communicated with the isolation window 110. In this way, the four dielectric resonators 1000 are arranged in two rows and two columns to form the dielectric body 100, the isolation window 110 for blocking energy transfer between the dielectric resonators 1000 is arranged in the middle of the dielectric body 100, and the first adjustment groove 120 is arranged between two adjacent dielectric resonators 1000, so that one end of the first adjustment groove 120 is arranged at an interval with one side wall of the dielectric body 100, and the other end of the first adjustment groove 120 is communicated with the isolation window 110; by adjusting the length of the first adjustment groove 120 and the depth of the first adjustment groove 120, the capacitive coupling bandwidth is adjusted accordingly. The second adjustment groove 130 may be formed on the bottom wall of the first adjustment groove 120 close to the isolation window 110 according to a second preset length, and the capacitive coupling bandwidth may be adjusted accordingly by adjusting the length of the first adjustment groove 120, the depth of the first adjustment groove 120, and the length of the second adjustment groove 130 independently, or by adjusting the length of the first adjustment groove 120, the depth of the first adjustment groove 120, and the length of the second adjustment groove 130 simultaneously. Then, a conductive layer 200 is formed on the outer walls (the first surface 140, the second surface 150, the side walls, the inner walls of the first adjustment groove 120, the inner walls of the second adjustment groove 130, the inner walls of the isolation window 110, and the inner walls of the adjustment holes 1100) of the dielectric body 100 by electroplating, so as to form an electrical wall and achieve an electromagnetic shielding effect. The diameter of the isolation window 110 can be flexibly adjusted according to actual needs, so as to achieve the purpose of flexibly adjusting the capacitive coupling bandwidth.
In one embodiment, a dielectric filter is also disclosed, comprising the capacitive coupling structure of any of the above embodiments.
In the dielectric filter of the above embodiment, the first adjustment groove 120 with the preset depth is flexibly opened between two adjacent dielectric resonators 1000 of the dielectric body 100 according to the first preset length, so that one end of the first adjustment groove 120 is spaced apart from one sidewall of the dielectric body 100, and the other end of the first adjustment groove 120 is communicated with the other sidewall of the dielectric body 100, that is, the first adjustment groove 120 extends to the other sidewall of the dielectric body 100, or the other end of the first adjustment groove 120 is communicated with the isolation window 110. In the dielectric filter of the embodiment, the opening depth of the first adjusting groove 120 and the length of the first adjusting groove 120 are flexibly adjusted, so that the capacitive coupling bandwidth can be flexibly adjusted, compared with the traditional blind hole mode, in order to realize small capacitive coupling bandwidth, the depth of the first adjusting groove 120 does not need to be independently adjusted, the design flexibility is improved, the production difficulty is reduced, the mass production is facilitated, and the subsequent production debugging is also facilitated; meanwhile, the capacitive coupling filter can achieve quite wide capacitive coupling bandwidth, is good in consistency and performance, saves production cost and facilitates control of different zero points of the dielectric filter.
In one embodiment, a duplexer including the dielectric filter of the above embodiment is also disclosed.
In the duplexer of the above embodiment, the first adjustment groove 120 with the preset depth is flexibly opened between two adjacent dielectric resonators 1000 of the dielectric body 100 according to the first preset length, so that one end of the first adjustment groove 120 is spaced apart from one sidewall of the dielectric body 100, and the other end of the first adjustment groove 120 is communicated with the other sidewall of the dielectric body 100, that is, the first adjustment groove 120 extends to the other sidewall of the dielectric body 100, or the other end of the first adjustment groove 120 is communicated with the isolation window 110. Compared with the traditional blind hole mode, the depth of the first adjusting groove 120 does not need to be adjusted independently in order to realize small capacitive coupling bandwidth, so that the flexibility of design is improved, the production difficulty is reduced, the mass production is facilitated, and the subsequent production debugging is also facilitated; meanwhile, the capacitive coupling filter can achieve quite wide capacitive coupling bandwidth, is good in consistency and performance, saves production cost and facilitates control of different zero points of the dielectric filter.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above examples represent only a few embodiments of the present invention, which are described in detail and detail, but are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. The capacitive coupling structure of the dielectric filter is characterized by comprising a first adjusting groove which is arranged between two adjacent dielectric resonators in a dielectric body and is arranged according to a first preset length and a preset depth, one end of the first adjusting groove is arranged at a distance from one side wall of the dielectric body, and the other end of the first adjusting groove is communicated with the other side wall of the dielectric body or the other end of the first adjusting groove is communicated with an isolation window.
2. The capacitive coupling structure of a dielectric filter according to claim 1, wherein a second adjustment groove is formed in a bottom wall of the first adjustment groove by a second predetermined length, the second adjustment groove penetrates through the dielectric body, and one end of the second adjustment groove is in communication with the other side wall of the dielectric body or one end of the second adjustment groove is in communication with the isolation window.
3. The capacitive coupling structure of a dielectric filter according to claim 2, wherein the second adjustment groove has a length W1And W is1Is adjustable.
4. The capacitive coupling structure of a dielectric filter according to claim 2, wherein a sidewall of the other end of the second adjustment groove is provided as a first circular arc segment, and/or a sidewall of one end of the first adjustment groove is provided as a second circular arc segment.
5. The capacitive coupling structure of a dielectric filter according to claim 1, wherein the first adjustment groove has a length W2And W is2The depth of the first adjusting groove is adjustable, and/or the depth of the first adjusting groove is H, and H is adjustable.
6. The capacitive coupling structure of a dielectric filter according to any one of claims 1 to 5, wherein the dielectric body includes at least three dielectric resonators arranged in parallel, the first adjustment groove is provided between two adjacent dielectric resonators, one end of the first adjustment groove is spaced apart from one sidewall of the dielectric body, and the other end of the first adjustment groove is communicated with the other sidewall of the dielectric body.
7. The capacitive coupling structure of a dielectric filter according to any one of claims 1 to 5, wherein the dielectric resonator is provided with an adjustment hole for adjusting a frequency.
8. The capacitive coupling structure of a dielectric filter according to any one of claims 1 to 5, wherein the dielectric body includes four dielectric resonators, the four dielectric resonators are arranged in two rows and two columns, an isolation window is provided on the dielectric body for isolating the four dielectric resonators, the first adjustment groove is provided between two adjacent dielectric resonators, one end of the first adjustment groove is spaced apart from one sidewall of the dielectric body, and the other end of the first adjustment groove is communicated with the isolation window.
9. A dielectric filter comprising a capacitive coupling structure according to any one of claims 1 to 8.
10. A duplexer comprising the dielectric filter according to claim 9.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110391486A (en) * | 2019-08-27 | 2019-10-29 | 京信通信技术(广州)有限公司 | Duplexer, dielectric filter and its capacitive coupling structure |
| CN112002973A (en) * | 2020-08-24 | 2020-11-27 | 石家庄市鹿泉区麦特思电子科技有限公司 | Microwave dielectric waveguide filter |
| CN112164848A (en) * | 2020-09-11 | 2021-01-01 | 广东通宇通讯股份有限公司 | Topological structure of dielectric filter and dielectric-filled waveguide filter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110391486A (en) * | 2019-08-27 | 2019-10-29 | 京信通信技术(广州)有限公司 | Duplexer, dielectric filter and its capacitive coupling structure |
| WO2021036944A1 (en) * | 2019-08-27 | 2021-03-04 | 京信通信技术(广州)有限公司 | Duplexer, and dielectric filter and capacitive coupling structure thereof |
| CN112002973A (en) * | 2020-08-24 | 2020-11-27 | 石家庄市鹿泉区麦特思电子科技有限公司 | Microwave dielectric waveguide filter |
| CN112164848A (en) * | 2020-09-11 | 2021-01-01 | 广东通宇通讯股份有限公司 | Topological structure of dielectric filter and dielectric-filled waveguide filter |
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