CN110048200B - Dielectric waveguide filter and capacitive coupling structure thereof - Google Patents
Dielectric waveguide filter and capacitive coupling structure thereof Download PDFInfo
- Publication number
- CN110048200B CN110048200B CN201910399101.3A CN201910399101A CN110048200B CN 110048200 B CN110048200 B CN 110048200B CN 201910399101 A CN201910399101 A CN 201910399101A CN 110048200 B CN110048200 B CN 110048200B
- Authority
- CN
- China
- Prior art keywords
- hole
- conductive layer
- capacitive coupling
- dielectric
- coupling structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000008878 coupling Effects 0.000 title claims abstract description 78
- 238000010168 coupling process Methods 0.000 title claims abstract description 78
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 78
- 230000001105 regulatory effect Effects 0.000 claims abstract description 43
- 238000004512 die casting Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000009713 electroplating Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 36
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 6
- 238000013461 design Methods 0.000 description 13
- 230000003993 interaction Effects 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000003989 dielectric material Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000006880 cross-coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/2002—Dielectric waveguide filters
Landscapes
- Control Of Motors That Do Not Use Commutators (AREA)
Abstract
The invention discloses a dielectric waveguide filter and a capacitive coupling structure thereof, wherein the capacitive coupling structure comprises a through hole arranged between two adjacent dielectric resonators in a dielectric body, the dielectric body is provided with a first surface and a second surface which are oppositely arranged at intervals, the through hole penetrates through the first surface and the second surface, the first surface is provided with a first regulating groove, the first regulating groove is arranged around the circumference of the through hole, the first regulating groove is arranged in a non-closed mode, the first regulating groove penetrates through a first conductive layer of the first surface, the second surface is provided with a second regulating groove, the second regulating groove is arranged around the circumference of the through hole, the second regulating groove is arranged in a closed mode, and the second regulating groove penetrates through a second conductive layer of the second surface. The capacitive coupling structure is convenient to process, low in production difficulty and capable of guaranteeing production quality; therefore, the dielectric waveguide filter adopting the capacitive coupling structure has low production difficulty and high production quality, and is suitable for mass production.
Description
Technical Field
The invention relates to the technical field of filters, in particular to a dielectric waveguide filter and a capacitive coupling structure thereof.
Background
The filter is an important component in communication equipment as a frequency selecting device. With the rapid development of communication technology and the entry into the 5G age, miniaturization of communication devices has become a trend of future development. The dielectric waveguide filter has a miniaturized characteristic and is widely applied to 5G communication equipment.
The dielectric waveguide filter improves the air-filled form of a conventional waveguide filter to a high dielectric constant ceramic material fill. The ceramic dielectric material plays roles of transmitting signals and supporting a structure through die casting molding. Meanwhile, the metal outer layer is used as an electric wall to be attached to the surface of the ceramic dielectric material, so that the electromagnetic shielding effect is achieved.
Conventional dielectric waveguide filters generally achieve better performance and smaller size by adding cross-coupling to achieve good loss and rejection, and therefore require the introduction of capacitive coupling structures. Conventional dielectric waveguide filters generally take the following two forms for the purpose of achieving capacitive coupling: 1. the method has the advantages that the capacitive coupling bandwidth is controlled by adjusting the distance between the depth of the holes and the surface of the dielectric waveguide filter in a deep hole mode, and the smaller the distance is, the narrower the capacitive coupling bandwidth is, so that the narrow capacitive coupling bandwidth is realized, the smaller the distance is, the sintering molding is affected, the sintering difficulty is increased, the problem of penetration is easy to occur in the production process, and the production difficulty is correspondingly increased; 2. the through hole is adopted, the concentric closed circular ring with the through hole is arranged in the circumferential direction of the through hole, the width of the circular ring is adjusted, the narrower the width is, the narrower the capacitive coupling bandwidth is, therefore, the narrow capacitive coupling bandwidth is to be realized, the distance between the outer diameter and the inner diameter of the circular ring is quite small, the error in the production process is uncontrollable, and meanwhile, the short circuit risk is increased. Therefore, the capacitive coupling structure of the traditional dielectric waveguide filter has high production difficulty, cannot ensure production quality and is not beneficial to mass production.
Disclosure of Invention
Based on the structure, a dielectric waveguide filter and a capacitive coupling structure thereof are provided, the capacitive coupling structure is convenient to process, the production difficulty is low, and the production quality can be ensured; therefore, the dielectric waveguide filter adopting the capacitive coupling structure has low production difficulty and high production quality, and is suitable for mass production.
The technical scheme is as follows:
in one aspect, a capacitive coupling structure of a dielectric waveguide filter is provided, including a through hole between two adjacent dielectric resonators in a dielectric body, the dielectric body is provided with a first surface and a second surface which are arranged at opposite intervals, the through hole penetrates through the first surface and the second surface, the first surface is provided with a first adjusting groove, the first adjusting groove is arranged around the circumference of the through hole, the first adjusting groove is arranged in a non-closed mode, and penetrates through a first conductive layer of the first surface, the second surface is provided with a second adjusting groove, the second adjusting groove is arranged around the circumference of the through hole, the second adjusting groove is arranged in a closed mode, and the second adjusting groove penetrates through a second conductive layer of the second surface.
According to the capacitive coupling structure of the dielectric waveguide filter, the through holes are formed between two adjacent dielectric resonators of the dielectric body, so that the through holes penetrate through the first surface and the second surface of the dielectric body, the first conductive layer is provided with the first adjusting groove, the first adjusting groove completely penetrates through the first conductive layer, and the width of the first adjusting groove can be flexibly designed according to actual needs; meanwhile, the first adjusting groove is arranged around the circumference of the through hole, and the first adjusting groove adopts a non-closed form, namely, the two ends of the first adjusting groove are not overlapped. A second regulating groove is formed in the second conductive layer, the second regulating groove completely penetrates through the second conductive layer, and the width of the second regulating groove can be flexibly designed according to actual requirements; meanwhile, the second regulating groove is arranged around the circumference of the through hole, and the second regulating groove adopts a closed form, namely, the second regulating groove is arranged completely around the circumference of the through hole. The capacitive coupling structure of the dielectric waveguide filter can flexibly adjust the capacitive coupling bandwidth by utilizing the interaction of the first adjusting groove on the first surface and the second adjusting groove on the second surface; meanwhile, compared with the traditional deep hole form or through hole form, the width of the first adjusting groove and/or the width of the second adjusting groove are/is not required to be small enough, and the narrow capacitive coupling bandwidth can be simply and flexibly realized, so that the design flexibility is improved, the production difficulty is reduced, and the production quality of products is ensured.
The technical scheme is further described as follows:
in one embodiment, the dielectric resonator is provided with an adjustment hole for adjusting the frequency.
In one embodiment, the first adjusting groove comprises a first side wall and a second side wall which are arranged at intervals relatively, the first side wall is arranged close to the central axis of the through hole relatively to the second side wall, the first side wall is arranged at intervals with the inner wall of the through hole, or the first side wall is arranged in superposition with the inner wall of the through hole.
In one embodiment, the second adjusting groove comprises a third side wall and a fourth side wall which are arranged at intervals relatively, the third side wall is arranged close to the central axis of the through hole relatively to the fourth side wall, the third side wall is arranged at intervals with the inner wall of the through hole, or the third side wall is arranged in superposition with the inner wall of the through hole.
In one embodiment, the first adjusting groove includes a first end and a second end opposite to each other, the first end and the second end are spaced apart, a line connecting the first end to a center of the through hole is a first boundary line, a line connecting the second end to the center of the through hole is a second boundary line, an included angle between the first boundary line and the second boundary line is β, and 0 ° < β <360 °. Therefore, the size of beta can be flexibly adjusted, the capacitive coupling bandwidth can be simply and conveniently adjusted, the design difficulty is low, and the production is convenient.
In one embodiment, the medium body includes a medium block, the medium block is provided with the through hole, the medium block is provided with a third surface and a fourth surface which are arranged at opposite intervals, the third surface is provided with the first conductive layer, the fourth surface is provided with the second conductive layer electrically connected with the first conductive layer, the inner wall of the through hole is provided with the third conductive layer, the first conductive layer is provided with the first regulating groove, the first conductive layer is electrically connected with the third conductive layer, the second conductive layer is provided with the second regulating groove, and the second conductive layer is disconnected with the third conductive layer.
In one embodiment, the dielectric block is integrally formed with a high dielectric constant material. In this way, signal transmission and structural support can be achieved.
In one embodiment, the cross section of the first adjusting groove is annular in an unsealed form, square in an unsealed form or elliptical in an unsealed form. Thus, the cross section shape of the first adjusting groove can be flexibly selected according to actual needs.
In one embodiment, the cross-sectional shape of the second adjusting groove is a closed circular ring, a closed square or a closed oval. Thus, the sectional shape of the second regulating groove can be flexibly selected according to actual needs.
In another aspect, a dielectric waveguide filter is provided that includes the capacitive coupling structure.
According to the dielectric waveguide filter, the through holes are formed between two adjacent dielectric resonators of the dielectric body, so that the through holes penetrate through the first surface and the second surface of the dielectric body, the first conductive layer is provided with the first adjusting groove, the first adjusting groove completely penetrates through the first conductive layer, and the width of the first adjusting groove can be flexibly designed according to actual needs; meanwhile, the first adjusting groove is arranged around the circumference of the through hole, and the first adjusting groove adopts a non-closed form, namely, the two ends of the first adjusting groove are not overlapped. A second regulating groove is formed in the second conductive layer, the second regulating groove completely penetrates through the second conductive layer, and the width of the second regulating groove can be flexibly designed according to actual requirements; meanwhile, the second regulating groove is arranged around the circumference of the through hole, and the second regulating groove adopts a closed form, namely, the second regulating groove is arranged completely around the circumference of the through hole. The dielectric waveguide filter can flexibly adjust the capacitive coupling bandwidth by utilizing the interaction of the first adjusting groove on the first surface and the second adjusting groove on the second surface of the capacitive coupling structure; meanwhile, compared with the traditional deep hole form or through hole form, the width of the first adjusting groove and/or the width of the second adjusting groove are/is not required to be small enough, and the narrow capacitive coupling bandwidth can be simply and flexibly realized, so that the design flexibility is improved, the production difficulty is reduced, the production quality of products is guaranteed, the consistency is good, the mass production is adapted, the dielectric waveguide filter is convenient to control different zero points, and the cost is saved.
Drawings
FIG. 1 is a schematic diagram of a first surface of a capacitive coupling structure of a dielectric waveguide filter according to one embodiment;
FIG. 2 is an enlarged partial view of a portion of the capacitive coupling structure A of the dielectric waveguide filter of FIG. 1;
FIG. 3 is a schematic diagram of a second surface of the capacitive coupling structure of the dielectric waveguide filter of FIG. 1;
FIG. 4 is a schematic diagram of the structure of the first surface of the capacitive coupling structure of the dielectric waveguide filter according to another embodiment;
FIG. 5 is an enlarged partial view of a portion of the capacitive coupling structure B of the dielectric waveguide filter of FIG. 4;
FIG. 6 is a cross-sectional view of a portion of the capacitive coupling structure C-C of the dielectric waveguide filter of FIG. 4;
FIG. 7 is a graph of β versus capacitive coupling bandwidth for a capacitive coupling structure of a dielectric waveguide filter of one embodiment;
FIG. 8 is a plot of β versus capacitive coupling bandwidth for a capacitive coupling structure of a dielectric waveguide filter of another embodiment;
FIG. 9 is a D diagram of a capacitive coupling structure of a dielectric waveguide filter of one embodiment 1 Or D 2 Graph of the bandwidth of the capacitive coupling.
Reference numerals illustrate:
100. dielectric body 110, first surface 120, second surface 130, through hole 131, inner wall of through hole 140, first adjustment groove 141, first sidewall 142, second sidewall 143, first end 144, second end 145, first boundary line 146, second boundary line 150, first conductive layer 160, second adjustment groove 161, third sidewall 162, fourth sidewall 170, second conductive layer 180, third conductive layer 190, dielectric block 191, third surface 192, fourth surface 1000, dielectric resonator 1100, adjustment hole.
Detailed Description
The present invention will be further described in detail with reference to the drawings and the detailed description, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples 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" or "fixed" on 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 "fixedly disposed" on or "fixedly connected" to another element, it can be detachably or non-detachably fixed therebetween. When an element is referred to as being "connected," "rotatably connected," or "rotatably 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 are used herein for illustrative purposes only and are not meant to be the only 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. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The terms "first," "second," "third," and the like in this disclosure do not denote a particular quantity or order, but rather are used for distinguishing between similar names.
As shown in fig. 1, 3 and 6, in one embodiment, a capacitive coupling structure of a dielectric waveguide filter is disclosed, including a through hole 130 disposed between two adjacent dielectric resonators 1000 in a dielectric body 100, the dielectric body 100 is provided with a first surface 110 and a second surface 120 disposed at opposite intervals, the through hole 130 penetrates the first surface 110 and the second surface 120, the first surface 110 is provided with a first adjustment groove 140, the first adjustment groove 140 is disposed around a circumference of the through hole 130, the first adjustment groove 140 is disposed in an unsealed form, the first adjustment groove 140 penetrates a first conductive layer 150 of the first surface 110, the second surface 120 is provided with a second adjustment groove 160, the second adjustment groove 160 is disposed around a circumference of the through hole 130, the second adjustment groove 160 is disposed in a sealed form, and the second adjustment groove 160 penetrates a second conductive layer 170 of the second surface 120.
In the capacitive coupling structure of the dielectric waveguide filter in the above embodiment, the through hole 130 is formed between two adjacent dielectric resonators 1000 of the dielectric body 100, so that the through hole 130 penetrates through the first surface 110 and the second surface 120 of the dielectric body 100, the first conductive layer 150 is provided with the first adjusting groove 140, and the first adjusting groove 140 completely penetrates through the first conductive layer 150, and the width of the first adjusting groove 140 can be flexibly designed according to actual needs; meanwhile, the first regulation groove 140 is disposed around the circumference of the through hole 130, and the first regulation groove 140 takes a non-closed form, i.e., both ends of the first regulation groove 140 do not coincide. A second adjusting groove 160 is formed on the second conductive layer 170, so that the second adjusting groove 160 completely penetrates through the second conductive layer 170, and the width of the second adjusting groove 160 can be flexibly designed according to actual needs; meanwhile, the second regulating groove 160 is disposed around the circumference of the through hole 130, and the second regulating groove 160 takes a closed form, i.e., the second regulating groove 160 is entirely disposed around the circumference of the through hole 130. The capacitive coupling structure of the dielectric waveguide filter in the above embodiment can flexibly adjust the capacitive coupling bandwidth by using the interaction of the first adjusting groove 140 on the first surface 110 and the second adjusting groove 160 on the second surface 120; meanwhile, compared with the traditional deep hole form or the through hole 130 form, the width of the first adjusting groove 140 and/or the width of the second adjusting groove 160 are/is not required to be small enough, and the narrow capacitive coupling bandwidth can be simply and flexibly realized, so that the design flexibility is improved, the production difficulty is reduced, and the production quality of products is ensured.
It should be noted that, the diameter of the through hole 130 may be flexibly adjusted according to actual needs, so as to achieve the purpose of flexibly adjusting the capacitive coupling bandwidth.
In one embodiment, 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 correspondingly adjusted according to the frequency of actual needs, and only needs to meet the actual use requirements.
In order to achieve narrow capacitive coupling bandwidth, production difficulty is reduced, design and processing are simple, assembly is easy, the widths of the first adjusting groove 140 and the second adjusting groove 160 can be flexibly adjusted according to actual requirements, debugging can be repeatedly conducted, and design and debugging difficulty is reduced.
As shown in fig. 2 and 5, in one embodiment, the first adjusting groove 140 includes a first sidewall 141 and a second sidewall 142 disposed at opposite intervals, and a distance D between the first sidewall 141 and the second sidewall 142 1 And preferably D 1 And is more than or equal to 0.5mm. In this way, the distance between the first sidewall 141 and the second sidewall 142 is greater than or equal to 0.5mm, that is, the width of the first adjusting groove 140 is greater than 0.5mm, which is favorable for designing the first adjusting groove 140, and meanwhile, the narrower the width of the first adjusting groove 140, the narrower the capacitive coupling bandwidth can be realized under the interaction with the second adjusting groove 160. The width of the first adjustment slot 140 may be 0.5mm, 1mm, 2.5mm, or other dimensions that can cooperate with the second adjustment slot 160 to achieve a narrow capacitive coupling bandwidth.
As shown in fig. 2 and 5, in one embodiment, the first sidewall 141 is disposed near the central axis of the through hole 130 opposite the second sidewall 142, and the first sidewall 141 is spaced apart from the inner wall 131 of the through hole 130. In this way, the first adjusting groove 140 surrounding the circumferential partial area of the through hole 130 is spaced from the through hole 130, even if errors exist in the process of opening the through hole 130, the influence of the errors can not be received in the process of opening the subsequent first adjusting groove 140, the design difficulty is reduced, the first adjusting groove 140 is ensured to be matched with the second adjusting groove 160, and the narrow capacitive coupling bandwidth is realized. Meanwhile, the capacitive coupling bandwidth can be flexibly adjusted by adjusting the interval distance between the first sidewall 141 and the inner wall 131 of the through hole 130.
In one embodiment, the first sidewall 141 is disposed near the central axis of the through hole 130 opposite to the second sidewall 142, and the first sidewall 141 is disposed coincident with the inner wall 131 of the through hole 130. In this way, the first adjustment groove 140 is communicated with the through hole 130, and the first adjustment groove 140 can be positioned by using the central axis of the through hole 130, so that design errors are reduced.
As shown in fig. 3, in the above embodiment, the second adjusting groove 160 includes a third sidewall 161 and a fourth sidewall 162 arranged at opposite intervals, and the distance between the third sidewall 161 and the fourth sidewall 162 is D 2 And preferably D 2 And is more than or equal to 0.5mm. In this way, the distance between the third side wall 161 and the fourth side wall 162 is greater than or equal to 0.5mm, that is, the width of the second adjusting groove 160 is greater than 0.5mm, which is favorable for designing the second adjusting groove 160, and meanwhile, the narrower the width of the second adjusting groove 160, the narrower the capacitive coupling bandwidth can be realized under the interaction with the first adjusting groove 140. The width of the second adjustment slot 160 may be 0.5mm, 1mm, 2.5mm, or other dimensions that can cooperate with the first adjustment slot 140 to achieve a narrow capacitive coupling bandwidth.
As shown in fig. 3, in one embodiment, the third sidewall 161 is disposed near the central axis of the through-hole 130 with respect to the fourth sidewall 162, and the third sidewall 161 is disposed spaced apart from the inner wall 131 of the through-hole 130. In this way, the annular closed second adjusting groove 160 is spaced from the through hole 130, even if errors exist in the opening process of the through hole 130, the errors cannot affect the opening process of the subsequent second adjusting groove 160, the design difficulty is reduced, the second adjusting groove 160 is ensured to be matched with the first adjusting groove 140, and the narrow capacitive coupling bandwidth is realized. Meanwhile, the capacitive coupling bandwidth can be flexibly adjusted by adjusting the interval distance between the third side wall 161 and the inner wall 131 of the through hole 130.
In one embodiment, the third sidewall 161 is disposed near the central axis of the through hole 130 with respect to the fourth sidewall 162, and the third sidewall 161 is disposed coincident with the inner wall 131 of the through hole 130. In this way, the second adjusting groove 160 with the annular closed shape is communicated with the through hole 130, and the second adjusting groove 160 can be positioned by using the central axis of the through hole 130, so that the design error is reduced.
As shown in fig. 2 and 5, in any of the above embodiments, the first adjusting groove 140 includes a first end 143 and a second end 144 opposite to each other, the first end 143 and the second end 144 are spaced apart, a line connecting the first end 143 to a center of the through hole 130 is a first boundary line 145, a line connecting the second end 144 to the center of the through hole 130 is a second boundary line 146, and an included angle between the first boundary line 145 and the second boundary line 146 is β, and 0 ° < β <360 °. Thus, along the length direction of the first adjustment groove 140, the first adjustment groove 140 extends from the first end 143 to the second end 144, and the first end 143 and the second end 144 are spaced apart, so that the first adjustment groove 140 is disposed circumferentially around a portion of the through hole 130 instead of entirely circumferentially around the through hole 130. Meanwhile, the capacitive coupling bandwidth can be adjusted by adjusting the included angle β between the first boundary line 145 and the second boundary line 146, and when the angle β is changed, as shown in fig. 7 and 8, the width and the width of the capacitive coupling bandwidth are correspondingly changed. Beta may be 45 deg., 90 deg., 135 deg., 180 deg., 225 deg., or other angles that enable the first tuning slot 140 to cooperate with the second tuning slot 160 to tune the capacitive coupling bandwidth.
In one embodiment, the cross-sectional shape of the first adjustment groove 140 is an annular shape in an unsealed form, a square shape in an unsealed form, or an oval shape in an unsealed form. The cross-sectional shape of the first regulating groove 140 can be flexibly adjusted according to actual production conditions and production requirements. The cross-sectional shape of the first adjusting groove 140 is preferably a non-closed annular shape, which is convenient for processing and reduces the production difficulty.
As shown in fig. 6, on the basis of any of the above embodiments, the dielectric body 100 includes a dielectric block 190, the dielectric block 190 is provided with a through hole 130, the dielectric block 190 is provided with a third surface 191 and a fourth surface 192 that are disposed at opposite intervals, the third surface 191 is provided with a first conductive layer 150, the fourth surface 192 is provided with a second conductive layer 170 electrically connected with the first conductive layer 150, the inner wall 131 of the through hole 130 is provided with a third conductive layer 180, the first conductive layer 150 is provided with a first adjustment slot 140, the first conductive layer 150 is electrically connected with the third conductive layer 180, the second conductive layer 170 is provided with a second adjustment slot 160, and the second conductive layer 170 is disconnected from the third conductive layer 180. In this way, since the first adjustment groove 140 is disposed around the circumference of the through hole 130 and the first adjustment groove 140 adopts a non-closed form, the first conductive layer 150 is electrically connected to the third conductive layer 180; meanwhile, the second conductive layer 170 is separated from the third conductive layer 180 by the second regulation groove 160, and the width of the second regulation groove 160 is not required to be too small in the case of realizing a narrow capacitive coupling bandwidth, so that a short circuit between the second conductive layer 170 and the third conductive layer 180 can be avoided. Further, by utilizing the interaction of the first adjusting groove 140 and the second adjusting groove 160, a narrow capacitive coupling bandwidth can be flexibly and simply realized. The first conductive layer 150, the second conductive layer 170, and the third conductive layer 180 may be formed by electroplating using a metal material such as copper.
Further, the dielectric block 190 is integrally formed with a high dielectric constant material. Thus, the dielectric block 190 is integrally formed by adopting a high dielectric constant material such as a ceramic dielectric, so that the function of transmitting signals can be achieved, and the function of structural support can be achieved. When the ceramic dielectric material is adopted, the dielectric block 190 can be manufactured in a die-casting molding mode, so that the size and weight of the whole dielectric waveguide filter can be remarkably reduced.
In one embodiment, after the dielectric block 190 is manufactured by die casting, the through holes 130 are started at the corresponding positions of the dielectric block 190; forming a conductive layer on the outer surface of the dielectric block 190 by electroplating to form an electric wall and play a role of electromagnetic shielding, wherein a first conductive layer 150 is formed on the third surface 191 of the dielectric block 190, a second conductive layer 170 is formed on the fourth surface 192 of the dielectric block 190, and a third conductive layer 180 is formed on the inner wall of the through hole 130; the first conductive layer 150 is provided with a first adjusting groove 140, and the first conductive layer 150 is still electrically connected with the third conductive layer 180 because the first adjusting groove 140 adopts a non-closed form; the second conductive layer 170 is provided with a second regulating groove 160, and the second regulating groove 160 is closed to disconnect the second conductive layer 170 from the third conductive layer 180. In this way, the capacitive coupling bandwidth can be flexibly adjusted by utilizing the interaction of the first adjusting slot 140 and the second adjusting slot 160.
On the basis of any of the above embodiments, the cross-sectional shape of the second regulating groove 160 is a closed-form circular ring shape, a closed-form square frame shape, or a closed-form elliptical shape. The sectional shape of the second regulating groove 160 can be flexibly adjusted according to actual production conditions and production requirements. The cross-sectional shape of the second regulating groove 160 is preferably a closed annular shape, which is convenient for processing and reduces the production difficulty.
As shown in fig. 1 to 3, in one embodiment, the cross-sectional shape of the first adjusting groove 140 is a first ring, the first ring is disposed concentrically with the through hole 130, the first ring extends from the first end 143 to the second end 144, the first end 143 is disposed at a distance from the second end 144, the diameter of the through hole 130 is 2mm, the inner diameter of the first ring is 2.4mm, and the outer diameter of the first ring is 4mm, i.e., the width of the first ring is 1.6mm. The connecting line between the first end 143 of the first circular ring and the center of the through hole 130 is a first boundary line 145, the connecting line between the second end 144 of the first circular ring and the center of the through hole 130 is a second boundary line 146, and the included angle between the first boundary line 145 and the second boundary line 146 is beta; the second adjusting groove 160 has a closed second circular ring in cross-sectional shape, and the second circular ring is concentrically disposed with the through hole 130, the second circular ring has an inner diameter of 2.4mm, and the second circular ring has an outer diameter of 4mm, i.e., a width of 1.6mm. Therefore, as shown in fig. 8, the width of the first ring and the width of the second ring are not required to be adjusted, and the capacitive coupling bandwidth can be correspondingly adjusted only by adjusting the size of beta, so that the method is simple and convenient, and the design difficulty and the production difficulty are reduced.
As shown in fig. 3 to 5, in one embodiment, the first adjusting groove 140 has a third circular ring with a cross-sectional shape, the third circular ring is concentrically disposed with the through hole 130, the diameter of the through hole 130 is 2mm, the third circular ring extends from the first end 143 to the second end 144, the first end 143 is spaced from the second end 144, the inner diameter of the third circular ring is 2.4mm, and the distance between the outer diameter of the third circular ring and the inner diameter of the third circular ring is D 1 I.e. the third ring has a width D 1 . The line between the first end 143 of the third ring and the center of the through hole 130 is a first boundary line 145, the line between the second end 144 of the third ring and the center of the through hole 130 is a second boundary line 146, the included angle between the first boundary line 145 and the second boundary line 146 is beta, and beta=260°; the second adjusting groove 160 has a closed fourth circular ring with an inner diameter of 2.4mm and a distance D between the outer diameter of the fourth circular ring and the inner diameter of the fourth circular ring 2 I.e. the fourth ring has a width D 2 . Thus, as shown in FIG. 9, only flexible adjustment D is required 1 And D 2 The size of the capacitive coupling bandwidth can be correspondingly adjusted, the capacitive coupling bandwidth is simple and convenient, and the design difficulty and the production difficulty are reduced.
In one embodiment, a dielectric waveguide filter is also disclosed, comprising the capacitive coupling structure of any of the embodiments described above.
In the dielectric waveguide filter of the above embodiment, the through hole 130 is formed between two adjacent dielectric resonators 1000 of the dielectric body 100, such that the through hole 130 penetrates through the first surface 110 and the second surface 120 of the dielectric body 100, the first conductive layer 150 is provided with the first adjustment groove 140, such that the first adjustment groove 140 completely penetrates through the first conductive layer 150, and the width of the first adjustment groove 140 can be flexibly designed according to actual needs; meanwhile, the first regulation groove 140 is disposed around the circumference of the through hole 130, and the first regulation groove 140 takes a non-closed form, i.e., both ends of the first regulation groove 140 do not coincide. A second adjusting groove 160 is formed on the second conductive layer 170, so that the second adjusting groove 160 completely penetrates through the second conductive layer 170, and the width of the second adjusting groove 160 can be flexibly designed according to actual needs; meanwhile, the second regulating groove 160 is disposed around the circumference of the through hole 130, and the second regulating groove 160 takes a closed form, i.e., the second regulating groove 160 is entirely disposed around the circumference of the through hole 130. In the dielectric waveguide filter of the above embodiment, the mutual interaction of the first adjusting groove 140 on the first surface 110 and the second adjusting groove 160 on the second surface 120 of the capacitive coupling structure is utilized, so that the capacitive coupling bandwidth can be flexibly adjusted; meanwhile, compared with the traditional deep hole form or the through hole 130 form, the width of the first adjusting groove 140 and/or the width of the second adjusting groove 160 are/is not required to be small enough, and the narrow capacitive coupling bandwidth can be simply and flexibly realized, so that the design flexibility is improved, the production difficulty is reduced, the production quality of products is guaranteed, the consistency is good, the method is suitable for mass production, the dielectric waveguide filter is convenient to control different zero points, and the cost is saved.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. The capacitive coupling structure of the dielectric waveguide filter is characterized by comprising a through hole arranged between two adjacent dielectric resonators in a dielectric body, wherein the dielectric body is provided with a first surface and a second surface which are oppositely arranged at intervals, the through hole penetrates through the first surface and the second surface, the first surface is provided with a first regulating groove, the first regulating groove is arranged around the circumference of the through hole, the first regulating groove is arranged in a non-closed mode, the first regulating groove penetrates through a first conductive layer of the first surface, the second surface is provided with a second regulating groove, the second regulating groove is arranged around the circumference of the through hole, the second regulating groove is arranged in a closed mode, and the second regulating groove penetrates through a second conductive layer of the second surface; the inner wall of the through hole is provided with a third conductive layer, the first conductive layer is electrically connected with the third conductive layer, and the second conductive layer is disconnected with the third conductive layer; the medium body comprises a medium block, the medium block is provided with a through hole, the medium block is provided with a third surface and a fourth surface which are arranged at intervals, the third surface is provided with a first conductive layer, and the fourth surface is provided with a second conductive layer which is electrically connected with the first conductive layer.
2. The capacitive coupling structure of a dielectric waveguide filter according to claim 1, wherein the dielectric resonator is provided with a tuning hole for tuning a frequency.
3. The capacitive coupling structure of a dielectric waveguide filter according to claim 1, wherein the first adjustment groove includes a first side wall and a second side wall disposed at opposite intervals, the first side wall is disposed near a central axis of the through hole with respect to the second side wall, the first side wall is disposed at an interval from an inner wall of the through hole, or the first side wall is disposed coincident with the inner wall of the through hole.
4. The capacitive coupling structure of a dielectric waveguide filter according to claim 1, wherein the second adjustment groove includes a third side wall and a fourth side wall that are disposed at opposite intervals, the third side wall is disposed near a central axis of the through hole with respect to the fourth side wall, the third side wall is disposed at an interval from an inner wall of the through hole, or the third side wall is disposed coincident with the inner wall of the through hole.
5. The capacitive coupling structure of a dielectric waveguide filter according to claim 1, wherein the first adjustment slot includes a first end and a second end opposite to each other, the first end and the second end are spaced apart, a line connecting the first end to a center of the through hole is a first boundary line, a line connecting the second end to the center of the through hole is a second boundary line, an included angle between the first boundary line and the second boundary line is β, and 0 ° < β <360 °.
6. The capacitive coupling structure of a dielectric waveguide filter according to claim 1, wherein the dielectric block is manufactured by die casting; the first conductive layer, the second conductive layer and the third conductive layer are formed on the outer surface of the dielectric block in an electroplating mode.
7. The capacitive coupling structure of a dielectric waveguide filter of claim 1, wherein the dielectric block is integrally formed of a high dielectric constant material.
8. The capacitive coupling structure of a dielectric waveguide filter according to any one of claims 1 to 7, wherein the cross-sectional shape of the first tuning slot is an annular shape in an unsealed form, a square shape in an unsealed form, or an oval shape in an unsealed form.
9. The capacitive coupling structure of a dielectric waveguide filter according to any one of claims 1 to 7, wherein the second tuning groove has a cross-sectional shape of a closed form of a circular ring, a closed form of a square frame, or a closed form of an ellipse.
10. A dielectric waveguide filter comprising a capacitive coupling structure according to any one of claims 1 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910399101.3A CN110048200B (en) | 2019-05-14 | 2019-05-14 | Dielectric waveguide filter and capacitive coupling structure thereof |
| PCT/CN2019/105223 WO2020228198A1 (en) | 2019-05-14 | 2019-09-10 | Dielectric waveguide filter and capacitive-coupling structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910399101.3A CN110048200B (en) | 2019-05-14 | 2019-05-14 | Dielectric waveguide filter and capacitive coupling structure thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110048200A CN110048200A (en) | 2019-07-23 |
| CN110048200B true CN110048200B (en) | 2024-03-26 |
Family
ID=67281861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910399101.3A Active CN110048200B (en) | 2019-05-14 | 2019-05-14 | Dielectric waveguide filter and capacitive coupling structure thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110048200B (en) |
| WO (1) | WO2020228198A1 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048200B (en) * | 2019-05-14 | 2024-03-26 | 京信通信技术(广州)有限公司 | Dielectric waveguide filter and capacitive coupling structure thereof |
| CN110148819B (en) * | 2019-06-20 | 2024-03-26 | 京信通信技术(广州)有限公司 | Capacitive coupling structure of dielectric waveguide filter and dielectric waveguide filter |
| CN110265753B (en) * | 2019-07-16 | 2023-10-27 | 深圳国人科技股份有限公司 | Dielectric waveguide filter |
| CN110600840B (en) * | 2019-09-30 | 2021-06-25 | 京信通信技术(广州)有限公司 | Balance degree adjusting method of dielectric filter and filter |
| KR102711167B1 (en) * | 2019-09-30 | 2024-09-30 | 후아웨이 테크놀러지 컴퍼니 리미티드 | Genetic Filter and Communication Device |
| CN110783670A (en) * | 2019-10-25 | 2020-02-11 | 京信通信技术(广州)有限公司 | Communication device, dielectric waveguide filter and capacitive coupling bandwidth adjusting method thereof |
| CN112928406A (en) * | 2019-12-06 | 2021-06-08 | 薛冰 | Dielectric filter with novel negative coupling structure |
| CN111403863A (en) * | 2020-04-03 | 2020-07-10 | 京信射频技术(广州)有限公司 | Communication device, dielectric waveguide filter and capacitance coupling adjusting method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687072A (en) * | 2019-01-11 | 2019-04-26 | 苏州艾福电子通讯有限公司 | Filter |
| CN209626393U (en) * | 2019-05-14 | 2019-11-12 | 京信通信技术(广州)有限公司 | Dielectric waveguide filter and its capacitive coupling structure |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3007267B1 (en) * | 2013-05-31 | 2017-09-06 | Huawei Technologies Co., Ltd. | Dielectric filter, transceiver and base station |
| CN206148589U (en) * | 2016-08-24 | 2017-05-03 | 张家港保税区灿勤科技有限公司 | Little volume dielectric waveguide wave filter |
| CN113991267B (en) * | 2017-02-16 | 2022-12-06 | 华为技术有限公司 | Dielectric filter, transceiver and base station |
| CN110048200B (en) * | 2019-05-14 | 2024-03-26 | 京信通信技术(广州)有限公司 | Dielectric waveguide filter and capacitive coupling structure thereof |
-
2019
- 2019-05-14 CN CN201910399101.3A patent/CN110048200B/en active Active
- 2019-09-10 WO PCT/CN2019/105223 patent/WO2020228198A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109687072A (en) * | 2019-01-11 | 2019-04-26 | 苏州艾福电子通讯有限公司 | Filter |
| CN209626393U (en) * | 2019-05-14 | 2019-11-12 | 京信通信技术(广州)有限公司 | Dielectric waveguide filter and its capacitive coupling structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110048200A (en) | 2019-07-23 |
| WO2020228198A1 (en) | 2020-11-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110048200B (en) | Dielectric waveguide filter and capacitive coupling structure thereof | |
| CN110148819B (en) | Capacitive coupling structure of dielectric waveguide filter and dielectric waveguide filter | |
| CN107534197B (en) | Dielectric filter, transceiver and base station | |
| WO2017107134A1 (en) | Filter, and wireless network device | |
| EP3007267B1 (en) | Dielectric filter, transceiver and base station | |
| CN110783668B (en) | Communication device, dielectric waveguide filter and capacitance coupling adjusting method thereof | |
| KR101720261B1 (en) | Tunable high frequency filter | |
| EP4084213A1 (en) | Band-stop filter and radio frequency device | |
| CN109149024B (en) | Dielectric waveguide filter and port strength debugging method thereof | |
| CN209880773U (en) | Capacitive coupling structure of dielectric waveguide filter and dielectric waveguide filter | |
| CN210074111U (en) | Negative coupling structure and dielectric filter | |
| CN210142706U (en) | Duplexer, dielectric filter and capacitive coupling structure thereof | |
| CN110400993B (en) | Dielectric filter assembly and dielectric filter thereof | |
| US6218914B1 (en) | Dielectric filter and dielectric duplexer including a movable probe | |
| US11145945B2 (en) | Dielectric filter | |
| CN110504517B (en) | Dielectric waveguide resonator, port coupling quantity adjusting method thereof and filter | |
| US9153852B2 (en) | Coaxial resonator, and dielectric filter, wireless communication module, and wireless communication device employing the coaxial resonator | |
| CN211150736U (en) | Capacitive coupling filter | |
| JP2018093473A (en) | Bandpass filter | |
| CN111403869A (en) | Communication device, narrow bandwidth dielectric waveguide filter and design method thereof | |
| CN211879574U (en) | Communication device and narrow bandwidth dielectric waveguide filter | |
| US11955682B2 (en) | CWG filter, and RU, AU or BS having the same | |
| CN113540721B (en) | Filter and communication equipment | |
| KR20030013605A (en) | A device of cavity band rejection filter | |
| CN117941171A (en) | Integrated low pass band pass filter unit formed of metal plates coated with dielectric material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200110 Address after: 510730 No. 6, layered Road, Guangzhou economic and Technological Development Zone, Guangdong Applicant after: COMBA TELECOM TECHNOLOGY (GUANGZHOU) Ltd. Address before: 510730 Guangdong city of Guangzhou province Guangzhou economic and Technological Development Zone Jinbi Road No. 6 Applicant before: COMBA TELECOM TECHNOLOGY (GUANGZHOU) Ltd. Applicant before: COMBA TELECOM SYSTEMS (CHINA) Ltd. Applicant before: COMBA TELECOM SYSTEMS (GUANGZHOU) Ltd. Applicant before: TIANJIN COMBA TELECOM SYSTEMS Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230807 Address after: 510730, No. 6, Jin Lu, Guangzhou economic and Technological Development Zone, Guangdong, Guangzhou Applicant after: COMBA TELECOM TECHNOLOGY (GUANGZHOU) Ltd. Applicant after: COMBA TELECOM SYSTEMS (GUANGZHOU) Ltd. Address before: 510730 No. 6, layered Road, Guangzhou economic and Technological Development Zone, Guangdong Applicant before: COMBA TELECOM TECHNOLOGY (GUANGZHOU) Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |