WO2015100597A1

WO2015100597A1 - Dielectric resonator, dielectric filter and communication device

Info

Publication number: WO2015100597A1
Application number: PCT/CN2013/091064
Authority: WO
Inventors: 张晓峰; 梁丹; 陈科
Original assignee: 华为技术有限公司
Priority date: 2013-12-31
Filing date: 2013-12-31
Publication date: 2015-07-09
Also published as: CN104981938A

Abstract

Provided is a dielectric resonator, comprising a dielectric body formed from a dielectric and a conductive layer covering the dielectric body; the dielectric body comprises a first blind hole extending from the conductive layer to the interior of the dielectric body and being used to change the resonance frequency of the dielectric resonator, the inner wall of the first blind hole being a dielectric. The present invention achieves regulation of the frequency of a dielectric resonator by providing a first blind hole in a dielectric body and changing the cross sectional area and depth of the first blind hole. Also provided are a dielectric filter and communication device.

Description

Dielectric resonator, dielectric filter and communication

Technical field

The present invention relates to the field of communications technologies, and in particular, to a dielectric resonator, a dielectric filter, and a communication device. Background technique

Due to the development of radio communication technology, low-cost, high-performance wireless communication transceiver systems require high-performance filters. Dielectric filters are widely used in various communication systems due to their small size, low loss, and high selectivity. The ability of the dielectric filter to select signals is mainly passband loss and stopband attenuation, and the passband loss is smaller. , the smaller the signal loss, the easier it is to pass; likewise, the larger the stopband attenuation, the better the signal selectivity and the easier it is to pass. The dielectric filter includes a dielectric resonator having a resonant cavity, a cover plate, and a screw. In order to improve the selectivity of the dielectric filter to the signal, a plurality of resonant cavities are often designed in the dielectric filter and cascaded in a certain manner to form a filter having a passband selection characteristic. The more the number of resonant cavities, the more the stopband attenuation Large, the stronger the ability to select signals. The conventional dielectric filter often adjusts the resonant cavity frequency of the dielectric filter by grinding the medium and repeatedly silver plating, but the repeated plating after grinding causes the debugging to be inconvenient. Summary of the invention

The present invention provides a dielectric resonator and a dielectric filter to facilitate debugging.

In a first aspect, a dielectric filter is provided, comprising: a dielectric body composed of a medium and a conductive layer covering the dielectric body, the dielectric body including a first blind via, the first blind via from the first A surface extends toward the interior of the dielectric body, an inner wall of the first blind via is a medium, and the first blind via is used to change a resonant frequency of the dielectric resonator.

The first blind hole for changing a resonant frequency of the dielectric resonator includes: the first blind hole is used to change by a change in at least one of a cross-sectional area and a depth of the first blind hole The resonant frequency of the dielectric resonator.

The first blind hole for changing a resonant frequency of the dielectric resonator includes: the first blind hole is used to change a change in an insertion length of a first debugging component inserted into the first blind hole The resonant frequency of the dielectric resonator.

Wherein the dielectric resonator further includes the first debugging component and for fixing the first debugging The first cover of the assembly.

The lower surface of the first cover plate is made of a metal material.

The cover plate is provided with a first hole, the first hole is in communication with the first blind hole, and the debugging component is matched with the first blind hole through the first hole, and is used for debugging The resonant frequency of the dielectric resonator, wherein the first debugging component includes a screw and a nut for fixing the screw to the first cover.

The first debugging component includes a screw, the first hole is a threaded hole, and the screw is fixed to the first cover plate through the threaded hole.

In a second aspect, a dielectric filter is provided comprising at least one dielectric resonator.

The dielectric filter includes at least two of the dielectric resonators, and the first cover plates of the at least two of the dielectric resonators are integrally connected.

In a third aspect, a dielectric filter is provided, comprising: a dielectric body composed of a medium and a conductive layer covering the dielectric body, the dielectric body comprising at least two dielectric resonators, the dielectric filter further comprising a coupling structure The coupling structure is configured to connect every two adjacent dielectric resonators, and the dielectric body further includes at least one second blind hole, wherein the second blind hole is used to debug a coupling bandwidth of the coupling structure. The second blind hole extends from the conductive layer to the inside of the medium body, the inner wall of the second blind hole is a medium, and the second blind hole is disposed at a position corresponding to the coupling structure.

The second blind hole is used to debug the coupling bandwidth of the coupling structure, and the second blind hole is configured to change the coupling structure by changing at least one of a cross-sectional area and a depth of the second blind hole. Coupling bandwidth.

The second blind hole is used to debug the coupling bandwidth of the coupling structure, and the second blind hole is used to change the coupling structure by changing a insertion length of a second debugging component inserted into the second blind hole. Coupling bandwidth.

Wherein the dielectric filter further comprises the second debugging component and a second cover for fixing the second debugging component.

The cover plate is further provided with a plurality of second holes, the second holes are in communication with the second blind holes, and the second debugging component is coupled to the second blind holes through the second holes. Used to debug the coupling bandwidth of the dielectric filter.

Wherein the dielectric filter includes at least two of the second debug component and a second cover, At least two second cover plates are integrally connected.

In a fourth aspect, a communication device is provided that includes the dielectric filter described above.

In the present invention, since the medium body is provided with a first blind hole for debugging the resonant frequency of the dielectric resonator, thereby changing the medium structure of the dielectric body of the dielectric resonator, or because the medium body is provided with a debugging medium. A second blind via of the filter's coupling bandwidth changes the dielectric structure of the dielectric body of the dielectric filter. Theoretically, according to the principle of electromagnetic field, a change in the dielectric structure of the dielectric body can cause a change in the distribution of the electromagnetic field within the dielectric resonator and within the dielectric filter. According to the simulation, the change of the electromagnetic field distribution in the dielectric resonator and the dielectric filter changes the frequency of the dielectric resonator and the coupling bandwidth of the dielectric filter, and the frequency of the dielectric filter composed of the dielectric resonator. In turn, it may change due to the change of the frequency of the dielectric resonator, that is, the frequency or coupling bandwidth of the dielectric filter may be adjusted, thereby achieving the purpose of changing the frequency or coupling bandwidth of the dielectric filter. DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

1 is an exploded perspective view of a dielectric resonator according to an embodiment of the present invention;

Figure 2 is a schematic view showing the assembly of the dielectric resonator shown in Figure 1;

3a is an exploded perspective view of a dielectric filter according to an embodiment of the present invention; FIG. 3b is an exploded perspective view of a dielectric filter according to another embodiment of the present invention; and FIG. 3c is another embodiment of the present invention; An exploded view of the dielectric filter provided; FIG. 4 is an assembled view of the dielectric filter shown in FIG. 3b;

Figure 5 is a cross-sectional view taken along line ΠΙ-ΠΙ in Figure 4;

Fig. 6 is an enlarged schematic view of a circle IV in Fig. 5.

Figure 7 is a schematic diagram showing the variation of the frequency of the dielectric filter shown in Figure 3b as a function of the width of the first blind via;

Figure 8 is a schematic diagram showing the simulation of the frequency of the dielectric filter shown in Figure 3b as a function of the depth of the first blind via; FIG. 9 is a schematic diagram showing the simulation of the coupling bandwidth of the dielectric filter shown in FIG. 3b as a function of the depth of the second blind via. detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

Referring to FIG. 1 and FIG. 2 together, a dielectric resonator 10 according to an embodiment of the present invention is provided. The dielectric resonator 10 includes a dielectric body 12 composed of a medium and a conductive layer 125 covering the dielectric body 12. The dielectric body 12 includes a first blind via 122, and the first blind via 122 extends from the conductive layer 125. The inner wall of the first blind hole 122 is a medium, and the first blind hole 122 is used to change the resonant frequency of the dielectric resonator 10 . The surface of the medium body 12 may be divided into a first surface 121 provided with the first blind hole 122 and a second surface 123 not provided with the first blind hole 122, the first surface 121 and the The second surface 123 is attached to the conductive layer 125.

Since the first blind hole 122 is provided in the dielectric body 12, the dielectric structure of the dielectric body 12 of the dielectric resonator 10 is changed. Theoretically, according to the principle of electromagnetic field, a change in the dielectric structure of the dielectric body 12 of the dielectric resonator 10 can result in an electromagnetic field within the dielectric resonator 10 and a dielectric filter 100 composed of the dielectric resonator 10 (eg The distribution within Figure 3) changes. According to the simulation, it is found that the change of the distribution of the electromagnetic field in the dielectric resonator 10 changes the frequency of the dielectric resonator 10, and the frequency of the dielectric filter 100 composed of the dielectric resonator 10 can also be adjusted to realize the change. The purpose of the dielectric resonator 10, or the frequency of the dielectric filter 100 constituted by the dielectric resonator 10.

Specifically, the size and depth of the cross-sectional area of the first blind via 122 may change the resonant frequency of the dielectric resonator 10. For example, increasing the cross-sectional area and depth of the first blind via 122 may increase the resonant frequency of the dielectric resonator 10, that is, increase. The frequency of the dielectric filter 100. The shape of the cross-sectional area of the first blind hole 122 is not limited in the present invention. For example, it may be a circular shape, a hexagonal shape, a square shape or other irregular shapes. The first blind hole 122 extends into the medium body. The method may also be not limited. For example, it may be a vertical extension, a trapezoidal extension, an S-shaped extension, or other irregular extension. The number of the first blind holes 122 is not limited in the present invention, and may be, for example, one. More than one, specifically set according to actual needs, in the present embodiment, the number of 1 is set at the strongest electric field of the dielectric resonator 10, which has the greatest influence on the frequency adjustment.

Further, as the width of the first blind via 122 increases, i.e., as the cross-sectional area of the first blind via 122 increases, the resonant frequency of the dielectric resonator 10 increases. As the depth of the first blind via 122 increases, the resonant frequency of the dielectric resonator 10 increases.

Still further, the resonant frequency of the dielectric resonator 10 can be changed by inserting the debug component 30 in the first blind via 122.

In summary, the dielectric resonator 10 of the present invention can change the resonant frequency of the dielectric resonator 10 by changing at least one of the cross-sectional area and the depth of the first blind via 122, and can also be inserted through the insertion. The change in the insertion length of the debug component 30 of the first blind via 122 changes the resonant frequency of the dielectric resonator 10, thereby solving the prior art in which the dielectric resonator 10 is adjusted by a method of grinding a medium and repeatedly silver plating. The problem of inconvenience in mass production and debugging caused by the resonance frequency.

In this embodiment, the material of the dielectric body 12 may be a material having a high dielectric constant (dielectric constant greater than 1), low loss (QF value greater than 1000), and a stable temperature coefficient, such as ceramic, titanium. Acid salt, etc.

In the present embodiment, the second surfaces 123 are connected to each other, and the first surface 121 is connected to a part of the second surface 123. Specifically, the first surface 121 may be a top surface of the medium body 12, and one of the second surfaces 123 opposite to the first surface 121 is referred to as a bottom surface. At the same time, the first surface 121 does not include the inner wall of the first blind hole 122, i.e., the inner wall of the first blind hole 122 does not adhere to the conductive layer 125.

In the present embodiment, the first blind hole 122 may extend perpendicularly from the first surface 121 toward the inside of the medium body 12. The cross-sectional shape of the first blind hole 122 may be a square shape. The medium body 12 is a rectangular parallelepiped. When the medium body 12 is a rectangular parallelepiped, the second surfaces 123 are perpendicularly connected to each other, and the first surface 121 is vertically connected to a part of the second surface 123.

In other embodiments, the first blind hole 122 may also extend from the first surface 121 to the interior of the media body 12 in other manners, such as obliquely extending, trapezoidal or S-shaped extensions, and the like. The cross-sectional shape of the first blind hole 122 may be other shapes such as a circle, a hexagon, and an ellipse. The medium body 12 may be other shapes such as a cylinder, a hexagon, or the like.

In this embodiment, the conductive layer 125 may be a conductive film and formed by electroplating. The first surface 121 and the second surface 123 are described.

In other embodiments, the conductive layer 125 may be formed on the first surface 121 and the second surface 123 by glue bonding.

In the present embodiment, the conductive layer 125 is made of a metal material such as silver or copper.

As a further improvement of the present invention, the dielectric resonator 10 may further include a cover 20 and the debug assembly 30 for fixing the debug assembly 30. The area of the cover plate 20 can be further increased, in addition to the fixing of the debugging assembly 30, for example, in conformity with the shape of the first surface 121 of the dielectric body 12, to dissipate heat from the dielectric resonator 10. That is the role of heat dissipation.

In the present embodiment, the material of the cover plate 20 may be a metal material or a material in which at least the lower surface is plated with a metal, so as to prevent leakage of electromagnetic wave energy in the dielectric resonator 10.

In the embodiment, the cover 20 is welded to the first surface 121, so that the combination of the cover 20 and the first surface 121 is relatively firm, that is, the combination of the cover 20 and the medium body 12 is relatively strong. In other embodiments, the cover 20 is glued to the first surface 121 by glue, thereby facilitating the mounting of the cover 20 and the media body 12.

Since the cover 20 is mounted on the first surface 121 of the medium body 12, that is, the cover 20 covers the first blind hole 122 of the medium body 12, thereby preventing electromagnetic waves from leaking from the top surface of the medium body 12.

In the embodiment, the debugging component 30 is mounted at a position corresponding to the first blind hole 122 of the cover plate 20, that is, the cover plate 20 is mounted as a debugging component 30 on the carrier of the medium body 12, thereby facilitating debugging of the component. 30 is mounted on the media body 12.

Further, the cover plate 20 is provided with a first hole 24, the first hole 24 is in communication with the first blind hole 122, and the debugging component 30 passes through the first hole 24 and the first blind hole 122. Cooperating, for debugging the resonant frequency of the dielectric resonator 10.

Further, the debugging assembly 30 includes a screw 34 and a nut 32 for fixing the screw 34 to the cover plate 20. In the present embodiment, the screw 34 may be referred to as a debugging screw, because the debugging screw is a screw 34 for debugging frequency, and the material may be metal or some or all of the material may be other dielectric materials such as plastic. Wherein, when the debugging screw portion is made of other dielectric materials, part of the material of the debugging screw inserted into the resonant cavity is a medium, and a part of the material connected to the cover plate is metal, so that the electromagnetic wave energy in the dielectric resonator 10 can be better prevented. Give way. In other embodiments, the debugging assembly 30 includes a screw 34, the first hole 24 is a threaded hole, and the screw 34 is fixed to the cover plate 20 through the threaded hole.

The cover plate 20 is mounted on the surface of the medium body 12 where the first blind hole 122 is disposed. In this embodiment, the first surface 121 is provided, and the debugging component 30 is mounted on the cover plate 20, so that the medium body 12 and the cover are The board 20 and the debug assembly 30 are assembled into a dielectric resonator 10.

In use, if the frequency of the dielectric resonator 10 needs to be debugged, the screw 34 is inserted into the first blind hole 122 of the medium body 12 through the first hole 24 of the cover 20, and the length of the screw 34 in the first blind hole 122. The difference is to change the electromagnetic field distribution inside the medium body 12, thereby changing the frequency of the dielectric resonator 10, that is, the frequency of the dielectric filter 100 is debugged. The longer the length of the screw 34 into the first blind hole 122, the lower the frequency of the dielectric resonator 10. Conversely, the shorter the length of the screw 34 into the first blind hole 122, the higher the frequency of the dielectric resonator 10. Of course, it is also possible to have no debug component 30, and the frequency of the dielectric resonator 10 is adjusted by the cross-sectional area and width of the first blind via 122.

Referring to Figures 3 through 6, the dielectric filter 100 of the present invention includes at least one of the above-described dielectric resonators 10. As shown in FIG. 3a, the first blind via 122 described in the above embodiment is disposed on the resonant cavity included in the dielectric filter 100, wherein the first blind via 122 is disposed on a resonant cavity, or The first blind hole 122 is disposed on the plurality of resonant cavities, and may be designed according to actual needs, and may not be limited in the present invention. Among them, the frequency of the dielectric filter 100 is determined by the frequency of the dielectric resonator 10 constituting it.

In another embodiment, the dielectric filter 100 may include at least two dielectric resonators 10 as shown in FIGS. 1 and 2, and the cover plates 20 of the two dielectric resonators 10 may be integrated into one body. The assembly can be made easier, and the function of dissipating the dielectric filter 100 by the cover 20 can be enhanced by the increase of the area of the cover 20.

When the dielectric filter 100 includes at least two dielectric resonators 10, the portion of the two dielectric resonators 10 to which the dielectric body 12 is connected has no conductive layer 125, that is, the outer surface of the dielectric body 12 of the dielectric filter 100 is disposed. There is a conductive layer 125 and no conductive layer 125 inside. Since the portion where the adjacent dielectric resonators 10 are connected has no conductive layer 125, generally, when the dielectric filter 100 is described, the dielectric bodies 12 of the plurality of dielectric resonators 10 are collectively referred to as the dielectric body 12 of the dielectric filter. The conductive layers 125 of the plurality of dielectric resonators are collectively referred to as a conductive layer 125 covering the dielectric body 12 of the dielectric filter 100, and the dielectric resonator formed by the dielectric bodies 12 of the N dielectric resonators 10 is referred to as a dielectric filter. N dielectric resonators of 100 (N is an integer not less than 1). In another embodiment, as shown in FIG. 3b, the first blind hole 122 described in the above embodiment is disposed on the resonant cavity included in the dielectric filter 100, and the dielectric filter further includes a coupling structure 40. The coupling structure 40 is used to connect every two adjacent dielectric resonators 10, and the dielectric body 12 further includes at least one second blind hole 124 for debugging the coupling structure 40. Coupling bandwidth. The second blind hole 124 extends from the conductive layer 125 to the inside of the dielectric body 12 , and the inner wall of the second blind hole 124 is a medium, that is, the inner surface of the second blind hole 124 does not adhere to the conductive layer 125 . The position of the second blind hole 124 is set to correspond to the position of the coupling structure 40. In the present invention, the number of the second blind holes 124 included in the dielectric filter 100 may not be set in the present invention. Limited. In addition, the number of the second blind holes 124 of the coupling structure 40 is not limited in the present invention. For example, one or more than one may be used, and the actual number may be set according to actual needs.

In this embodiment, a first blind hole is disposed on each of the resonant cavities, and a second blind hole 124 is disposed on the coupling structure 40 between each adjacent two resonant cavities, that is, each of the Two blind holes 124 are located between each two adjacent first blind holes 122, and the first blind holes 122 and the second blind holes 124 are spaced apart.

As shown in FIGS. 3 and 4, in one embodiment, the coupling structure 40 can include a plurality of pairs of coupling grooves 42, each pair of coupling grooves 42 including two coupling grooves 42 that are symmetrical with respect to the longitudinal axis of the medium nature 12. One coupling groove 42 of each pair of coupling grooves 42 extends from a longer length second surface 123 of the medium body 12 toward the inside of the medium body 12, and the other coupling groove 42 from a longer length second surface 123 of the medium body 12. The inside of the medium body 12 extends, but the two coupling grooves 42 are not connected, and each of the coupling grooves 42 penetrates the top surface and the bottom surface of the medium body 12. In the present embodiment, the coupling groove 42 includes four pairs of coupling grooves 42. It can be understood that the coupling structure 40 can also implement the coupling between the resonant cavities in other existing manners, which are not described in the present invention, and may not be limited (ie, the present invention can be combined with the coupling structure that appears later). .

In the present embodiment, the second blind hole 124 is disposed at a position corresponding to the coupling structure 40. Specifically, a second blind hole 124 is disposed between each pair of coupling grooves 42, that is, the position of the second blind hole 124 in the medium body 12 is determined by the position of the coupling groove 42. And the number of the second blind holes 124 is the same as the number of the coupling grooves 42.

Since the first blind hole 122 and the second blind hole 124 are provided on the medium body 12, the medium structure of the medium body 12 of the dielectric filter 100 is changed. In theory, according to the principle of electromagnetic field, The change in the dielectric structure of the dielectric body 12 of the dielectric filter 100 can cause a change in the distribution of the electromagnetic field within the dielectric filter 100. According to simulations, a change in the distribution of the electromagnetic field within the dielectric filter 100 changes the frequency and coupling bandwidth of the dielectric filter 100, thereby achieving the purpose of changing the frequency and coupling bandwidth of the dielectric filter 100.

Specifically, the size and depth of the cross section of the first blind via 122 may change the resonant frequency of the dielectric filter 100. Increasing the cross-sectional area and depth of the first blind via 122 may increase the resonant frequency of the dielectric filter 100. The size and depth of the cross section of the second blind via 124 can change the coupling bandwidth of the dielectric filter 100, such as increasing the cross-sectional area of the second blind via 124 and increasing the depth of the second blind via 124 to reduce the coupling bandwidth of the dielectric filter 100. The shape of the cross section of the second blind hole 124 is not limited in the present invention. For example, it may be a circular shape, a hexagonal shape, a square shape or other irregular shapes. The second blind hole 124 extends into the medium body 12 . The method may also be not limited. For example, it may be vertical extension, trapezoidal extension, S-shaped extension, or other irregular extension.

Further, referring to FIG. 7, as the width of the first blind via 122 increases, that is, as the cross-sectional area of the first blind via 122 increases, the resonant frequency of the dielectric filter 100 increases. Referring to Figure 8, as the depth of the first blind via 122 increases, the resonant frequency of the dielectric filter 100 increases. In other words, increasing the cross-sectional area and depth of the first blind via 122 can increase the resonant frequency of the dielectric filter 100. Referring to FIG. 9, the coupling bandwidth of the dielectric filter 100 is reduced as the cross-sectional area and depth of the second blind via 124 are increased.

Further, the present invention achieves the purpose of changing the frequency and coupling bandwidth of the dielectric filter 100 by designing the first blind via 122 and the second blind via 124 on the dielectric body 12, thereby solving the existing In the art, the problem of inconvenience in mass production and debugging is caused by adjusting the resonance frequency and the coupling bandwidth of the dielectric filter 100 by the method of grinding the medium and repeatedly silver plating.

In this embodiment, the number of the first blind holes 122 is three, the number of the second blind holes 124 is four, and the number of the second blind holes 124 is larger than the number of the first blind holes 122. One.

The dielectric body 12 is provided with a first blind via 122 in each of the resonant cavities, so that the stopband attenuation of the dielectric filter 100 of the present invention is large and the signal selectivity is good.

In this embodiment, the first blind hole 122 and the second blind hole 124 extend perpendicularly from the first surface 121 toward the inside of the medium body 12. The cross-sectional shape of the first blind hole 122 and the second blind hole 124 may be square. The medium body 12 is a rectangular parallelepiped.

In other embodiments, the first blind hole 122 and the second blind hole 124 may also be other The manner extends from the first surface 121 to the interior of the media body 12, such as obliquely extending, trapezoidal or S-shaped extensions, and the like. The cross-sectional shape of the first blind hole 122 and the second blind hole 124 may be other shapes such as a circle, a hexagon, and an ellipse. The medium body 12 may be other shapes such as a cylinder, a hexagon, or the like.

In this embodiment, the cross-sectional area and depth of the first blind hole 122 may both be equal to the cross-sectional area and depth of the second blind hole 124.

In other embodiments, the cross-sectional area of the first blind hole 122 may be equal to the cross-sectional area of the second blind hole 124, but the depth of the first blind hole 122 is not equal to the depth of the second blind hole 124; Alternatively, the cross-sectional area of the first blind hole 122 is not equal to the cross-sectional area of the second blind hole 124, but the depth of the first blind hole 122 is equal to the depth of the second blind hole 124; The cross-sectional area and depth of the first blind hole 122 are not equal to the cross-sectional area and depth of the second blind hole 124. That is, the design and arrangement of the first blind hole 122 and the second blind hole 124 are independent, and may be respectively performed according to actual needs, and may not affect each other.

As shown in FIG. 3 to FIG. 6 , the dielectric filter 100 further includes a plurality of debugging components 30 and a cover plate 20 for fixing the debugging component 30 . The debugging component 30 is mounted on the corresponding cover plate 20 . The positions of the first blind hole 122 and the second blind hole 124 are described. The debug component 30 is inserted into the second blind hole 124 for debugging the coupling bandwidth of the dielectric filter 100 (in this case, the debug component 30 may be referred to as a second debug component); the debug component 30 is inserted In the first blind hole 122, the frequency for debugging the dielectric filter 100 (at this time, the debugging component 30 may be referred to as a first debugging component).

The cover plate 20 may further be provided with a plurality of second holes 22, the second holes 22 and the second blind holes

124 connected. In other words, the cover plate 20 is provided with a plurality of first holes 24 and a plurality of second holes 22, and the first holes 24 communicate with the first blind holes 122.

In the present embodiment, the first hole 24 and the second hole 22 may be referred to as a debugging hole, because the debugging component 30 is inserted into the first blind hole 122 and the second hole 22 through the first hole 24 . Inserted into the second blind hole 124 to change the electromagnetic field distribution of the resonant cavity in the dielectric body 12, so it can be called a debug hole.

In the present embodiment, the axis of each of the first holes 24 coincides with the axis of each of the first blind holes 122, that is, the first blind holes 122 and the first holes 24 correspond to each other. The axis of each of the second holes 22 coincides with the axis of each of the second blind holes 124, that is, the second blind holes 124 and the second holes 22 correspond to each other. When installed, the cover plate 20 is mounted on the first surface 121 of the medium body 12, and the debugging assembly 30 is mounted on the cover plate 20 and inserted into the first blind hole 122 and the second blind hole 124, respectively, thereby multiple dielectric resonances. The device 10 is assembled as a dielectric filter 100.

In use, if the frequency of the dielectric filter 100 needs to be debugged, the screw 34 is inserted into the first blind hole 122 of the medium body 12 through the first hole 24 of the cover 20, and the length of the screw 34 in the first blind hole 122. The difference is to change the electromagnetic field distribution inside the medium body 12, thereby changing the frequency of the dielectric filter 100. The longer the length of the screw 34 into the first blind hole 122, the lower the frequency of the dielectric filter 100. Conversely, the shorter the length of the screw 34 into the first blind hole 122, the higher the frequency of the dielectric filter 100.

If it is necessary to debug the dielectric filter 100 coupling bandwidth, pass the screw 34 through the second hole of the cover 20.

22 extends into the second blind hole 124 of the medium body 12, and the electromagnetic field distribution inside the medium body 12 is changed by the difference in the length of the screw 34 in the second blind hole 124, thereby changing the coupling bandwidth of the dielectric filter 100. The longer the length of the screw 34 into the second blind hole 124, the larger the coupling bandwidth of the dielectric filter 100. Conversely, the shorter the length of the screw 34 into the second blind hole 124, the smaller the coupling bandwidth of the dielectric filter 100.

Furthermore, the number of the debugging components 30 disposed on the cover plate 20 can be adjusted according to actual needs, that is, the number of the debugging components 30 can be different from the number of the first blind holes 122 and the second blind holes 124. For example, when the frequency and coupling bandwidth of the dielectric filter 100 can be ensured by designing the first blind via 122 and the second blind via 124 on the dielectric body 12, the debug component 30 is not required, corresponding A corresponding first hole 24 or second hole 22 is not provided on the cover plate 20. Alternatively, the cover plate 20 may be provided with a screw 34 only at a portion of the first blind hole 122, that is, a part of the first hole 24 is provided on the cover plate 20, and the adjustment screw 34 is inserted into the cover plate A blind hole 122 may reduce the frequency of the dielectric filter 100, or withdrawing the screw 34 from the first blind hole 122 may increase the frequency of the dielectric filter 100. The cover plate 20 may be provided with a screw 34 only at a position of a part of the second blind hole 124, that is, a partial second hole 22 is provided on the cover plate 20, and the second blind is extended by the adjusting screw 34. The aperture 124 may increase the coupling bandwidth of the dielectric filter 100, or the extraction of the screw 34 out of the second blind via 124 may reduce the coupling bandwidth of the dielectric filter 100. At the same time, a screw 34 is disposed on the cover plate 20 at a position corresponding to the first blind hole 122, that is, a position corresponding to the first blind hole 122 is provided on the cover plate 20 A hole 24 is inserted into the first hole 24 but does not protrude into the first blind hole 122. Also available in the cover A screw 34 is disposed on the plate 20 at a position corresponding to the second blind hole 124. That is, a second hole 22 is disposed at a position corresponding to the second blind hole 124 on the cover plate 20, and the screw 34 is provided. The second hole 22 is inserted but does not extend into the second blind hole 124. No screw 34 is provided at a position where the cover plate 20 corresponds to the first blind hole 122 or the second blind hole 124, or the screw 34 is inserted into the hole first hole 24 or the second hole 22 but does not extend. When entering the first blind hole 122 or the second blind hole 124, the frequency can be adjusted by changing the sectional area and depth of the first blind hole 122, and the coupling bandwidth can be changed by changing the sectional area and depth of the second blind hole 124. Adjustment.

Therefore, the distribution of the air medium in the first blind hole 122 of the dielectric filter 100 can be changed by the adjustment screw 34, thereby changing the distribution of at least one of the electric field and the magnetic field in the dielectric filter 100, thereby changing The frequency of the dielectric filter 100. At the same time, the distribution of the air medium in the second blind hole 124 of the dielectric filter 100 can be changed by the adjusting screw 34, thereby changing the distribution of at least one of the electric field and the magnetic field in the dielectric filter 100, thereby The coupling bandwidth of the dielectric filter 100 is described.

Because the first blind hole 122 or the second blind hole of the dielectric filter 100 can be changed by extending the screw 34 into the first blind hole 122 or the second blind hole 124. The distribution of the air medium within the 124, while the first blind hole 122 of the dielectric filter 100 or the movement of the screw 34 within the first blind hole 122 or the second blind hole 124 The distribution of the air medium in the second blind hole 124 is also constantly changed, so that the dielectric filter 100 can have different frequencies and coupling bandwidths. Therefore, the embodiment of the present invention can expand the debugging range of the dielectric filter 100.

Further, since the medium body 12 is provided with a plurality of first blind holes 122 and a plurality of second blind holes 124, the movement of the screws 34 in any one of the first blind holes 122 or the second blind holes 124 is The distribution of the air medium in any one of the first blind holes 122 or the any one of the second blind holes 124 of the dielectric filter 100 is also changed, so that the dielectric filter 100 can have different frequencies. And coupling bandwidth. Therefore, the embodiment of the present invention can further expand the debugging range of the dielectric filter 100.

Further, the adjustment of the frequency of the dielectric filter 100 of the present invention can be adjusted not only by the length of the screw 34 extending into the first blind hole 122, but also by changing the first blind hole 122. The cross-sectional area and depth are adjusted. Meanwhile, the adjustment of the coupling bandwidth of the dielectric filter 100 of the present invention can be adjusted not only by the length of the screw 34 extending into the second blind hole 124, Moreover, it can be adjusted by changing the cross-sectional area and depth of the second blind hole 122, thereby further facilitating adjustment of the frequency and coupling bandwidth of the dielectric filter 100, thereby increasing user convenience.

In the present invention, the tops of the first blind holes 122 and the second blind holes 124 may be on the same side. A position of the cover plate 20 corresponding to the top of the first blind hole 122 and the second blind hole 124 may be provided with a screw 34 for adjusting the frequency and coupling bandwidth of the dielectric filter 100. The screws 34 are on the same plane, so that the adjustment of the frequency and the coupling bandwidth of the dielectric filter 100 in the same direction can be realized, and the conventional dielectric filter 100 is no longer required to pass the grinding medium and repeatedly silver plating. Method for adjusting the frequency and the coupling bandwidth, that is, adjusting the frequency and the coupling bandwidth around the dielectric filter, and at the same time not hindering the assembly of components around the dielectric filter 100, thereby debugging and assembling the user. Brought convenience. Theoretically, variations in the dielectric structure of the dielectric body 12 of the dielectric filter 100 may result in variations in the distribution of electromagnetic fields within the dielectric filter 100, depending on the principles of the electromagnetic field. According to the simulation, the change of the distribution of the electromagnetic field in the dielectric filter 100 changes the frequency and coupling bandwidth of the dielectric filter 100, that is, the frequency and coupling bandwidth of the dielectric filter 100 can be adjusted, thereby realizing the change. The purpose of the frequency and coupling bandwidth of the dielectric filter 100.

In another embodiment, as shown in FIG. 3c, the dielectric filter 100 may include the second blind hole 124 and the corresponding design described above, without limiting whether it includes the first blind hole 122 and corresponding Design. Specifically, the medium body 12 composed of a medium and the conductive layer 125 covering the medium body, the medium body 12 includes at least two dielectric resonators, and the dielectric filter further includes a coupling structure 40, the coupling The structure 40 is used to connect every two adjacent dielectric resonators, and the dielectric body 12 further includes at least one second blind hole 124 for debugging the coupling bandwidth of the coupling structure 40. The second blind hole 124 extends from the conductive layer 125 to the inside of the medium body 12, the inner wall of the second blind hole 124 is a medium, and the second blind hole 124 is disposed at a position and the coupling structure. 40 corresponds. Wherein, the dielectric cavity is composed of a medium, and the first blind hole 122 as shown in FIG. 1 and FIG. 2 may not be limited.

Further, the dielectric filter 100 includes a debugging component 30 and a cover plate 20 for fixing the debugging component 30. The debugging component 30 is mounted at a position corresponding to the second blind hole 124 of the cover plate 20, and the debugging The component 30 is inserted into the second blind via 124 for adjusting the coupling bandwidth of the dielectric filter 100.

In summary, the dielectric filter 100 of the present invention may include the first blind via 122 and the first At least one of the two blind holes 124, that is, includes the first blind hole 122 and the corresponding design provided by the embodiment of the present invention, or includes the second blind hole 124 and the corresponding design provided by the embodiment of the present invention, or The first blind hole 122 and the second blind hole 124 and the corresponding design provided by the embodiment of the present invention are included.

The present invention also provides a communication device using the above-described dielectric filter 100, which may be a base station for wireless communication or a terminal. Further, the present invention also provides other devices that need to be applied to the dielectric filter 100, such as radar devices and the like.

In the present invention, the debug component inserted into the first blind hole 122 is referred to as a first debug component, and the cover 20 for fixing the first debug component is referred to as a first cover. The debug component inserted into the second blind hole 124 is referred to as a second debug component, and the cover 20 for fixing the second debug component is referred to as a second cover. When the dielectric filter 100 includes only the first cover plate, the two adjacent first cover plates can be integrally connected, so that the assembly can be made easier, and the cover plate can be strengthened by the increase of the area of the cover plate 20. 20 functions to dissipate heat from the dielectric filter 100; when the dielectric filter 100 includes only the second cover, two adjacent second covers may be integrally connected; when the dielectric filter 100 includes the first In the cover plate and the second cover plate, the first cover plate and the second cover plate can be integrally connected, so that the assembly can be made more convenient, and the cover plate 20 can be strengthened by the increase of the area of the cover plate 20. The function of dissipating heat to the dielectric filter 100. Meanwhile, the structures of the first debugging component and the second debugging component may be the same or different; the structures of the first cover and the second cover may be the same or different.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art The scope of the protection is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the present invention are covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Rights request

1. A dielectric resonator, characterized in that, the dielectric resonator includes a dielectric body composed of a medium and a conductive layer covering the dielectric body, the dielectric body includes a first blind hole, and the first blind hole Extending from the conductive layer to the inside of the dielectric body, the inner wall of the first blind hole is dielectric, and the first blind hole is used to change the resonant frequency of the dielectric resonator.

2. The dielectric resonator according to claim 1, wherein the first blind hole is used to change the resonant frequency of the dielectric resonator including: the first blind hole is used to pass through the first blind hole. A change in at least one of the cross-sectional area and depth of the hole changes the resonant frequency of the dielectric resonator.

3. The dielectric resonator according to claim 1 or 2, wherein the first blind hole is used to change the resonant frequency of the dielectric resonator including: the first blind hole is used to insert the The resonant frequency of the dielectric resonator is changed by changing the insertion length of the first debugging component of the first blind hole.

4. The dielectric resonator according to claim 3, wherein the dielectric resonator further includes the first debugging component and a first cover plate for fixing the first debugging component.

5. The dielectric resonator according to claim 4, wherein the lower surface of the first cover plate is made of metal material.

6. The dielectric resonator according to claim 4 or 5, wherein the cover plate is provided with a first hole, the first hole is connected to the first blind hole, and the debugging component passes through the first blind hole. The first hole cooperates with the first blind hole and is used to adjust the resonant frequency of the dielectric resonator.

7. The dielectric resonator according to any one of claims 3 to 6, wherein the first debugging component includes a screw and a nut, and the nut is used to fix the screw to the first cover plate. .

8. The dielectric resonator according to any one of claims 3 to 6, wherein the first debugging component includes a screw, the first hole is a threaded hole, and the screw is fixed to the The first cover plate.

9. A dielectric filter, characterized in that the dielectric filter includes at least one dielectric resonator according to any one of claims 1 to 8.

10. The dielectric filter according to claim 9, wherein the dielectric filter includes at least two dielectric resonators, and the first cover plates of the at least two dielectric resonators are connected into one body. .

11. A dielectric filter, characterized in that, the dielectric filter includes a dielectric body composed of a medium and a conductive layer covering the dielectric body, and the dielectric body includes at least two dielectric resonances. cavity, the dielectric filter also includes a coupling structure, the coupling structure is used to connect every two adjacent dielectric resonant cavities, the dielectric body also includes at least one second blind hole, the second blind hole For debugging the coupling bandwidth of the coupling structure, the second blind hole extends from the conductive layer to the inside of the dielectric body, the inner wall of the second blind hole is a medium, and the location of the second blind hole Corresponds to the coupling structure.

12. The dielectric filter according to claim 11, wherein the second blind hole is used to adjust the coupling bandwidth of the coupling structure including: the second blind hole is used to pass a cross section of the second blind hole. A change in at least one of area and depth changes the coupling bandwidth of the coupling structure.

13. The dielectric filter according to claim 11 or 12, wherein the second blind hole is used to adjust the coupling bandwidth of the coupling structure by inserting a second blind hole. The insertion length of the second debug component of the hole is changed to change the coupling bandwidth of the coupling structure.

14. The dielectric filter according to claim 13, wherein the dielectric filter further includes the second debugging component and a second cover plate for fixing the second debugging component.

15. The dielectric filter according to claim 14, wherein the cover plate is further provided with a plurality of second holes, the second holes are connected to the second blind holes, and the second debugging component The second hole cooperates with the second blind hole to adjust the coupling bandwidth of the dielectric filter.

16. The dielectric filter according to claim 14 or 15, characterized in that, the dielectric filter includes at least two second debugging components and a second cover plate, and the at least two second cover plates are connected to As one body.

17. A communication device, characterized by comprising the dielectric filter according to any one of claims 9 to 16.