CN111384495A - Dielectric filter and communication equipment - Google Patents
Dielectric filter and communication equipment Download PDFInfo
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- CN111384495A CN111384495A CN201910209558.3A CN201910209558A CN111384495A CN 111384495 A CN111384495 A CN 111384495A CN 201910209558 A CN201910209558 A CN 201910209558A CN 111384495 A CN111384495 A CN 111384495A
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P7/00—Resonators of the waveguide type
- H01P7/10—Dielectric resonators
- H01P7/105—Multimode resonators
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Abstract
The application discloses a dielectric filter and a communication device. The dielectric filter includes at least: the first multimode dielectric resonator comprises a first dielectric block and a first metal layer covering the surface of the first dielectric block; the second multimode dielectric resonator comprises a second dielectric block and a second metal layer covering the surface of the second dielectric block; the third dielectric block is connected between the first dielectric block and the second dielectric block and used for realizing the coupling between the first multimode dielectric resonator and the second multimode dielectric resonator, and the third dielectric block is rotatably connected with the first dielectric block and/or the second dielectric block and used for adjusting the resonance mode between the first multimode dielectric resonator and the second multimode dielectric resonator. In this way, the resonance mode of the output of the dielectric filter can be increased, the frequency band can be widened, and the application range can be improved.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a dielectric filter and a communications device for a 5G communications system.
Background
With the rapid advance of communication technology, especially in the coming 5G communication era, more rigorous technical requirements are put on system architecture, and while high-efficiency and high-capacity communication is realized, system modules are required to be highly integrated, miniaturized, light-weighted and low-cost. For example, when the 5G Massive MIMO technology further expands the system channel from the current 8 or 16 channels to 32, 64, or even 128 channels, the overall architecture size of the system cannot be too large, and even a certain degree of miniaturization needs to be realized. The microwave filter is used as a core component of a system, and performance parameters, size and cost of the microwave filter have great influence on the performance, architecture size and cost of the system.
The dielectric filter is composed of a plurality of dielectric resonators, has the characteristics of miniaturization and high performance, and receives more and more attention. The volume and the weight of the filter can be greatly reduced by adopting the multimode filter, and as the technology of dielectric materials is mature day by day, the mass production of the multimode dielectric resonator can be realized. However, in the prior art, after the dielectric filter is formed, the resonant mode of the dielectric filter is fixed, so that the effective frequency band or the application range of the conventional dielectric filter is small.
Disclosure of Invention
The technical problem that this application mainly solved provides a dielectric filter and communication equipment to solve above-mentioned problem.
In order to solve the technical problem, the application adopts a technical scheme that: there is provided a dielectric filter including at least: the first multimode dielectric resonator comprises a first dielectric block and a first metal layer covering the surface of the first dielectric block; the second multimode dielectric resonator comprises a second dielectric block and a second metal layer covering the surface of the second dielectric block; the third dielectric block is connected between the first dielectric block and the second dielectric block and used for realizing the coupling between the first multimode dielectric resonator and the second multimode dielectric resonator, and the third dielectric block is rotatably connected with the first dielectric block and/or the second dielectric block and used for adjusting the resonance mode between the first multimode dielectric resonator and the second multimode dielectric resonator.
In order to solve the above technical problem, the present application adopts another technical solution: the communication device comprises the dielectric filter and the antenna, wherein the dielectric filter is coupled with the antenna, and the dielectric filter is used for filtering the transceiving signals of the antenna.
The beneficial effect of this application is: different from the prior art, the dielectric filter of the embodiment of the present application at least includes: the first multimode dielectric resonator comprises a first dielectric block and a first metal layer covering the surface of the first dielectric block; the second multimode dielectric resonator comprises a second dielectric block and a second metal layer covering the surface of the second dielectric block; the third dielectric block is connected between the first dielectric block and the second dielectric block and used for realizing the coupling between the first multimode dielectric resonator and the second multimode dielectric resonator, and the third dielectric block is rotatably connected with the first dielectric block and/or the second dielectric block and used for adjusting the resonance mode between the first multimode dielectric resonator and the second multimode dielectric resonator. In the present embodiment, the third dielectric block is rotatably connected to the first dielectric block and/or the second dielectric block, so that the three-dimensional size of the third dielectric block relative to the first multimode dielectric resonator and/or relative to the second multimode dielectric resonator can be adjusted to adjust the resonant mode of the first multimode dielectric resonator and the second multimode dielectric resonator transmitted through the third dielectric block. Therefore, the resonance mode of the output of the dielectric filter can be increased, the frequency band can be widened, and the application range can be widened.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a first embodiment of a dielectric filter according to the present application;
FIG. 2 is a schematic cross-sectional view AA of the dielectric filter of the embodiment of FIG. 1;
FIG. 3 is a schematic structural diagram of a second embodiment of a dielectric filter according to the present application;
FIG. 4 is a schematic structural diagram of a third embodiment of a dielectric filter according to the present application;
FIG. 5 is a schematic structural diagram of a fourth embodiment of a dielectric filter according to the present application;
fig. 6 is a schematic structural view of a fifth embodiment of the dielectric filter of the present application;
fig. 7 is a schematic structural diagram of a sixth embodiment of a dielectric filter according to the present application;
FIG. 8 is a schematic structural view of a second embodiment of an interposer for a dielectric filter according to the present application;
FIG. 9 is a schematic structural view of a third embodiment of an interposer for a dielectric filter according to the present application;
FIG. 10 is a schematic structural view of a fourth embodiment of an interposer for a dielectric filter according to the present application;
FIG. 11 is a schematic structural view of a fifth embodiment of an interposer for a dielectric filter according to the present invention;
fig. 12 is a schematic structural diagram of an embodiment of the communication device of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be noted that the following examples are only illustrative of the present application, and do not limit the scope of the present application. Likewise, the following examples are only some examples and not all examples of the present application, and all other examples obtained by a person of ordinary skill in the art without any inventive step are within the scope of the present application.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The dielectric filter and the communication equipment can be used for a 5G communication system.
The dielectric filter is prepared by filling the resonant cavity with materials such as ceramics with high dielectric constants and the like, so that a microwave wavelength compression effect can be generated, the effective size of the resonant cavity can be greatly compressed, the overall size of the dielectric filter is miniaturized, and meanwhile, the materials such as ceramics are easy to mold, and batch production with lower cost can be realized, so that the dielectric filter is highly matched with the technical requirements of 5G micro base stations (Small Cells) and MIMO systems, and higher attention and market application of related communication scenes are obtained.
First, a dielectric filter is proposed, as shown in fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a first embodiment of the dielectric filter; figure 2 is a schematic cross-sectional view AA of the dielectric filter of the embodiment of figure 1. The dielectric filter 101 of the present embodiment includes at least: the first multimode dielectric resonator 102 comprises a first dielectric block 201 and a first metal layer 202 covering the surface of the first dielectric block 201; the second multimode dielectric resonator 103 comprises a second dielectric block 203 and a second metal layer 204 covering the surface of the second dielectric block 203; the third dielectric block 104 is connected between the first dielectric block 201 and the second dielectric block 203 and used for realizing the coupling between the first multimode dielectric resonator 102 and the second multimode dielectric resonator 103, and the third dielectric block 104 is rotatably connected with the first dielectric block 201 and the second dielectric block 203 and used for adjusting the resonance mode between the first multimode dielectric resonator 102 and the second multimode dielectric resonator 103.
In this embodiment, the first dielectric block 102, the second dielectric block 103, and the third dielectric block 104 may be made of the same dielectric material, which may be a ceramic material. In other embodiments, the material of the dielectric block may also be other materials with high dielectric constant and low loss, such as glass, quartz crystal, or titanate, and is not limited to the same material.
The material of the metal layer in this embodiment may be silver, copper, aluminum, titanium, tin, gold, or the like. In this embodiment, a specific mold may be used to form the first dielectric block 201, the second dielectric block 203, and the third dielectric block 104, and then the first metal layer 202 is formed on the surface of the first dielectric block 201, the second metal layer 204 is formed on the surface of the second dielectric block 203, and the third metal layer 105 is formed on the surface of the third dielectric block 104 by electroplating, spraying, or welding.
In the process of forming the metal layers, a steel mesh silver coating process may be adopted to form a first window on the first metal layer 201, a second window on the second metal layer 203, and a third window and a fourth window on the third metal layer 105, and when the dielectric filter 101 is assembled, the first window and the third window are aligned, the second window and the fourth window are aligned, the first metal layer 202 and the third metal layer 105 are welded and fixed through a welding process, and the second metal layer 204 and the third metal layer 105 are welded and fixed. Of course, in other embodiments, the first multimode dielectric resonator, the second multimode dielectric resonator and the third dielectric block may be fixed by other methods, for example, by connecting with conductive adhesive or by clamping with other clamps.
To avoid electromagnetic signal leakage, the size of the first window should be consistent with the size of the third window, and the size of the second window should be consistently aligned with the size of the fourth window.
In another embodiment, a metal layer may be uniformly coated on the surfaces of the first dielectric block, the second dielectric block, and the third dielectric block to simplify the process and improve the electromagnetic shielding performance.
The metal layer can confine an electromagnetic field in the first dielectric block 201, the second dielectric block 203, and the third dielectric block 104, and can prevent an electromagnetic signal from leaking, thereby forming a standing wave oscillation signal in the first dielectric block 201, the second dielectric block 203, and the third dielectric block 104.
Optionally, both the first multimode dielectric resonator 102 and the second multimode dielectric resonator 103 of this embodiment are dual-mode dielectric resonators, and a bevel edge chamfer for performing resonant mode coupling is formed on one surface of each dual-mode dielectric resonator, and the chamfer can change electromagnetic field distribution of two resonant modes to be coupled, so that coupling of the two resonant modes can be achieved.
The first multimode dielectric resonator 102 may transfer energy of one of the two resonant modes through the third dielectric block 104.
The resonant mode is selected according to the three-dimensional size of the third dielectric block 104, and particularly according to the cross-sectional area of the third dielectric block 104 parallel to the connecting surface of the third dielectric block 104 with the first dielectric block 201. The present embodiment can select a resonance mode of transmission by adjusting the sectional area of the third dielectric block 104.
Different from the prior art, the present embodiment can adjust the three-dimensional size of the third dielectric block 104 with respect to the first multimode dielectric resonator 102 and/or with respect to the second multimode dielectric resonator 103 by rotatably connecting the third dielectric block 104 with the first dielectric block 201 and/or with the second dielectric block 202, so as to adjust the resonant mode of the first multimode dielectric resonator 102 and the second multimode dielectric resonator 103 transmitted through the third dielectric block 104. Therefore, the resonance mode output from the dielectric filter 101 can be increased, the frequency band can be widened, and the application range can be widened.
Optionally, the dielectric filter 101 of this embodiment further includes a first dielectric shaft 106, one end of the first dielectric shaft 106 is fixed to the first surface of the first dielectric block 201, a groove is provided on a surface of the third dielectric block 104 close to the first dielectric block 201, when the third dielectric block 104 is connected to the first dielectric block 201, the other end of the first dielectric shaft 106 is inserted into the groove, and when the third dielectric block 104 rotates relative to the first dielectric block 201, the first dielectric shaft 106 rotates in the groove.
In this way, the third dielectric block 104 can be rotated centering on the first dielectric shaft 106, and the sectional area of the third dielectric block 104 parallel to the connection face thereof with the first dielectric block 201 can be changed to adjust the resonant mode transmitted in the third dielectric block 104.
One end of the first medium shaft 106 inserted in the groove is circular, so that the first medium shaft 106 can smoothly rotate in the groove, and friction is reduced.
In order to simplify the process, the first dielectric shaft 106 and the first dielectric block 201 are integrally formed. In other embodiments, the first dielectric shaft and the first dielectric block may be secured by a welding process.
Further, to realize the resonance mode of the second multimode dielectric resonator 103 transmitted through the third dielectric block 104, the first dielectric axis 107 may be provided between the second dielectric block 203 and the third dielectric block 104. The structure and operation principle of the first medium shaft 107 are the same as those of the first medium shaft 108, and are not described herein.
The present embodiment is capable of achieving rotation not only between the first multimode dielectric resonator 102 and the third dielectric block 104 but also between the second multimode dielectric resonator 103 and the third dielectric block 104.
Optionally, the dielectric filter 101 of the present embodiment is further provided with an adjusting member 110, where the adjusting member 110 is a coupling hole 110, and a metal layer 105 covers the coupling hole 110 to prevent the electromagnetic signal from leaking from the coupling hole 110. The present embodiment may adjust the coupling strength between the first multimode dielectric resonator 102 and the second multimode dielectric resonator 103 by polishing or thickening the metal layer 405 in the coupling hole 110, or realize cross coupling between the first multimode dielectric resonator 102 and the second multimode dielectric resonator 103, and realize the transmission zero point, and adjust the out-of-band rejection of the dielectric filter 101. Of course, in other embodiments, an adjusting screw may be disposed in the coupling hole, and the coupling strength of the first multimode dielectric resonator and the second multimode dielectric filter may be adjusted by adjusting the depth of the adjusting screw in the blind hole.
In another embodiment, blind holes may be further disposed on the surfaces of the first multimode dielectric filter and the second dielectric filter, and the structure and the operation principle thereof are similar to those of the coupling holes, which are not described herein again.
Furthermore, in order to improve the adjustment precision of the resonant frequency, a plurality of blind holes can be arranged on one dielectric body, and the size data of each blind hole is different.
It should be noted that in the dielectric filter, the number of multimode dielectric resonators, the number of third dielectric blocks, the number of blind holes on the same multimode dielectric resonator, the number of coupling holes on the third dielectric block, and whether the number of blind holes on different multimode dielectric resonators is the same or not, and whether the number of coupling holes on different third dielectric blocks is the same or not, are not limited in the embodiments of the present application.
The third dielectric block of the embodiment of the present application may be disposed between the first multimode dielectric resonator and the second multimode dielectric resonator in the lateral direction or the longitudinal direction.
The dielectric filter 101 of the present embodiment further includes an input terminal 108 and an output terminal 109, the input terminal 108 is provided on the first multimode dielectric resonator 102, and the output terminal 109 is provided on the second multimode dielectric resonator 103.
In another embodiment, as shown in fig. 3, fig. 3 is a schematic structural diagram of a dielectric filter according to a second embodiment of the present application. The dielectric filter 301 of this embodiment is different from the above-mentioned dielectric filter 101 in that a groove is provided on a side surface of the first dielectric block 302 of the dielectric filter 301 of this embodiment, which is close to the third dielectric block 303, one end of the first dielectric shaft 304 is fixed to the third dielectric block 303, and when the third dielectric block 303 is connected to the first dielectric block 302, the other end of the first dielectric shaft 304 is inserted into the groove, which also enables the third dielectric block 303 and the first dielectric block 302 to rotate relatively.
Similar structures are also provided between the second dielectric block 305 and the third dielectric block 303, which are not described in detail.
Of course, in another embodiment, the third dielectric block is integrally formed with the second dielectric block, and only the rotation between the first dielectric block and the third dielectric block is realized.
The present application further proposes a dielectric filter of a third embodiment, and as shown in fig. 4, a dielectric filter 401 of this embodiment is different from the dielectric filter 101 described above in that: the first multimode dielectric resonator 102, the second multimode dielectric resonator 103, and the third dielectric block 104 of the dielectric filter 101 are arranged along a straight line, and the first multimode dielectric resonator 402, the second multimode dielectric resonator 403, and the third dielectric block 404 of the dielectric filter 401 of this embodiment are arranged along an L-shape.
The present application further proposes a dielectric filter of a fourth embodiment, and as shown in fig. 5, a dielectric filter 501 of the present embodiment is different from the dielectric filter 101 described above in that: in this embodiment, the first multimode dielectric resonator 502 and the second multimode dielectric resonator 503 are both three-mode dielectric resonators, and chamfer angles for performing resonant mode coupling are formed on the surfaces of the three-mode dielectric resonators perpendicular to each other, so that the three-mode dielectric resonators generate three resonant modes.
As can be seen from the above analysis, the rotation between the first multimode dielectric resonator or the second multimode dielectric resonator and the third dielectric block can be achieved by the first dielectric axis, and the cross-sectional area of the third dielectric block parallel to the connecting surface thereof with the first dielectric block or the second dielectric block can be changed, so that the selection of two modes can be achieved.
In order to realize the selection of three modes, the present application further proposes a dielectric filter of a fifth embodiment, and as shown in fig. 6, a dielectric filter 601 of the present embodiment is different from the above-mentioned dielectric filter 501 in that: the dielectric filter 601 of this embodiment further includes a second dielectric shaft 602, a second surface of the first multimode dielectric resonator 603 is provided with a window 604, when the third dielectric block 605 is connected to the first dielectric block (not shown), one end of the second dielectric shaft 602 is fixed to the window 604, and the other end of the second dielectric shaft 602 is disposed in a groove of the third dielectric block 605, wherein the first surface of the first multimode dielectric resonator 603 provided with the first dielectric shaft 606 is perpendicular to the second surface.
In the present embodiment, the cross-sectional area of the third dielectric block 605 parallel to the connection surface with the first multimode dielectric resonator 603, that is, the size of the first dielectric block 605 relative to the first dimension and the second dimension of the first multimode dielectric resonator 603, can be changed by the first dielectric axis 606; the third dielectric block 603 can be disposed on the second surface of the first multimode dielectric resonator 603 through the second dielectric axis 602 in the present embodiment, that is, the size of the first dielectric block 605 with respect to the third dimension of the first multimode dielectric resonator 603 can be changed through the second dielectric axis 602. Therefore, the third dielectric block 605 can be adjusted to selectively transmit any one of the resonance modes of the first multimode dielectric resonator 603, and the resonance mode of the output of the dielectric filter 601 can be further increased.
In other embodiments, a second dielectric axis may be further disposed on the second multimode dielectric resonator to adjust the third dielectric block to selectively transmit any one of the resonant modes of the second multimode dielectric resonator, which is not described in detail herein.
At least two of the length, the width and the height of the third dielectric block in the embodiment of the present application are different, so that the two-dimensional size or the three-dimensional size of the third dielectric block relative to the multimode dielectric resonator can be changed when the third dielectric block rotates relative to the multimode dielectric resonator.
Further, the surface of the medium shaft and the surface of the groove are polished smoothly, so that abrasion of the medium shaft during rotation is reduced, and the service life is prolonged.
Further, the embodiment of the present application does not limit the position of the medium axis on the medium block.
Further, the material or dielectric constant of the dielectric shaft of the embodiment of the present application is the same as or similar to that of the dielectric block, so as to reduce interference.
In another embodiment, the first multimode dielectric resonator is a dual-mode dielectric resonator, and the second dielectric resonator is a triple-mode dielectric resonator. In other embodiments, the first multimode dielectric resonator may also be a dielectric resonator of three or more modes, and the second multimode dielectric resonator may also be a dielectric resonator of three or more modes.
The present application further proposes a dielectric filter of a sixth embodiment, and as shown in fig. 7, a dielectric filter 701 of the present embodiment is different from the dielectric filter 101 described above in that: in this embodiment, the single-mode resonator 704 is formed by the third dielectric block 702 and the metal layer 703 on the surface thereof, and a first window is formed on a contact surface between the first multimode dielectric resonator 705 and the single-mode resonator 704, so as to realize coupling between the first multimode dielectric resonator 704 and the single-mode resonator 705; a second window is formed on a contact surface of the second multimode dielectric resonator 706 and the single-mode resonator 704, and is used for realizing the coupling between the second multimode dielectric resonator 706 and the single-mode resonator 704.
The first media spindle 707 of the present embodiment may be disposed in a first window, and the first media spindle 708 may be disposed in a second window. Of course, in other embodiments, the media shaft may be disposed separately from the window.
The surface of the single-mode resonator 704 of this embodiment is further provided with a first adjusting element 708, the first adjusting element 708 is a coupling hole 708, and the coupling hole 708 is the same as the coupling hole 110, which is not described herein again.
The third dielectric block of the above embodiment is square to realize positive coupling between the first multimode dielectric resonator and the second multimode dielectric resonator. Of course, the structural style of the third dielectric block can also be set according to actual needs, for example: a structure identical or similar to that of the third dielectric block described below is provided.
In other embodiments, to achieve negative coupling between the first multimode dielectric resonator and the second multimode dielectric resonator, the third dielectric block extends in a plane parallel to the gap between the first dielectric block and the second dielectric block for a length greater than half the wavelength of the operating frequency of the dielectric filter for reversing the polarity of the coupling with the first multimode dielectric resonator and with the second multimode dielectric resonator.
Specifically, the third dielectric block includes at least: the medium comprises a first medium part and a second medium part, wherein the second medium part extends from the end part of the first medium part, and the first medium part and the second medium part form an angle range of 0-90 degrees with each other.
In an embodiment, as shown in fig. 8, fig. 8 is a schematic structural diagram of a second embodiment of a third dielectric block in a dielectric filter of the present application. The third dielectric block 801 of this embodiment has an arcuate cross-sectional shape parallel to the gap between the first dielectric block (not shown) and the second dielectric block (not shown).
The plurality of medium portions may be formed by sintering after being formed by a mold, or may be formed by splicing a plurality of medium portions and then sintering after being formed, which is not particularly limited.
It is understood that the wider the width of the dielectric portion is set, the stronger the negative coupling strength between the first multimode dielectric resonator and the second multimode dielectric resonator is. Of course, the widths of the different dielectric portions may be different, so that the coupling polarity between the first multimode dielectric resonator and the second multimode dielectric resonator can be reversed without affecting the essence that the total length of the dielectric portion having the overall arch-shaped dielectric portion structure exceeds the half-wavelength scheme.
In summary, the scheme of reversing the coupling polarity is simpler in structure by changing the structural form of the dielectric plate, the coupling strength can be controlled by changing the length and the line width of each dielectric part, the productivity is high, and the cost is lower.
In another embodiment, as shown in fig. 9, fig. 9 is a schematic structural diagram of a third embodiment of a third dielectric block in a dielectric filter of the present application. The third dielectric block 901 of this embodiment includes a first dielectric portion 902 and a second dielectric portion 903, the extending direction of the first dielectric portion 902 and the upper and lower surfaces of the dielectric block may form any angle, the second dielectric portion 903 is connected to the end portion of the first dielectric portion 902, the first dielectric portion 902 and the second dielectric portion 903 form an angle with each other, the range of the angle formed between the first dielectric portion 902 and the second dielectric portion 903 is (0, 90 °), the angle may be 15 °, 30 °, 45 ° or 60 °, and the like, so that the dielectric plate 901 is in a V shape.
In another embodiment, the extending direction of the first dielectric part may be perpendicular to the upper and lower surfaces of the dielectric block, the second dielectric part is connected to the end of the first dielectric part, and the first dielectric part and the second dielectric part form an angle of 90 ° with each other, so that the third dielectric block is L-shaped.
In another embodiment, the third dielectric block may also be formed by connecting a plurality of dielectric plates 901 end to end, so that the third dielectric block is W-shaped.
In another embodiment, as shown in fig. 10, the third dielectric block 1001 includes a first dielectric portion 1002 and a second dielectric portion 1003, the extending direction of the first dielectric portion 1002 is parallel to the upper and lower surfaces of the dielectric block, the second dielectric portion 1003 extends from the middle of the first dielectric portion 1002, the first dielectric portion 1002 and the second dielectric portion 1003 form an angle of 90 ° with each other, so that the third dielectric block 1001 is T-shaped.
In another embodiment, as shown in fig. 11, the third dielectric block 1101 may include only the first dielectric portion 1102, and the first dielectric portion 1102 is disposed in an arc shape, such as a C-shape.
In other embodiments, the third dielectric block may have other shapes, such as U-shape, N-shape, etc., which are not described herein.
The third dielectric block of the embodiment of the present application may include one, two, or more than two dielectric portions to form various shapes.
It should be noted that, in order to implement the multimode dielectric resonator, the multimode dielectric resonator may also be implemented by performing right-angle corner cutting on the surface of the dielectric resonator or forming a through hole on the surface of the dielectric resonator, and the implementation is not limited specifically.
The present application further provides a communication device, as shown in fig. 12, a communication device 1201 according to this embodiment includes a dielectric filter 1203 and an antenna 1202, where the dielectric filter 1203 is coupled to the antenna 1202, and the dielectric filter 1203 is configured to filter a transmission and reception signal of the antenna 1202. The dielectric filter 1203 of this embodiment is a dielectric filter of the above embodiment, and the structure and the operation principle thereof are not described herein again.
The communication device 1201 may be a base station or a terminal for 5G communication, and the terminal may specifically be a mobile phone, a tablet computer, a wearable device with a 5G communication function, or the like.
Different from the prior art, the dielectric filter of the embodiment of the present application at least includes: the first multimode dielectric resonator comprises a first dielectric block and a first metal layer covering the surface of the first dielectric block; the second multimode dielectric resonator comprises a second dielectric block and a second metal layer covering the surface of the second dielectric block; the third dielectric block is connected between the first dielectric block and the second dielectric block and used for realizing the coupling between the first multimode dielectric resonator and the second multimode dielectric resonator, and the third dielectric block is rotatably connected with the first dielectric block and/or the second dielectric block and used for adjusting the resonance mode between the first multimode dielectric resonator and the second multimode dielectric resonator. In the present embodiment, the third dielectric block is rotatably connected to the first dielectric block and/or the second dielectric block, so that the three-dimensional size of the third dielectric block relative to the first multimode dielectric resonator and/or relative to the second multimode dielectric resonator can be adjusted to adjust the resonant mode of the first multimode dielectric resonator and the second multimode dielectric resonator transmitted through the third dielectric block. Therefore, the resonance mode of the output of the dielectric filter can be increased, the frequency band can be widened, and the application range can be widened.
It should be noted that the above embodiments belong to the same inventive concept, and the description of each embodiment has a different emphasis, and reference may be made to the description in other embodiments where the description in individual embodiments is not detailed.
The protection circuit and the control system provided by the embodiment of the present application are described in detail above, and a specific example is applied in the description to explain the principle and the embodiment of the present application, and the description of the above embodiment is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
The above description is only for the purpose of illustrating embodiments of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A dielectric filter, characterized in that the dielectric filter comprises at least:
the first multimode dielectric resonator comprises a first dielectric block and a first metal layer covering the surface of the first dielectric block;
the second multimode dielectric resonator comprises a second dielectric block and a second metal layer covering the surface of the second dielectric block;
the third dielectric block is connected between the first dielectric block and the second dielectric block and used for realizing the coupling between the first multimode dielectric resonator and the second multimode dielectric resonator, and the third dielectric block is rotatably connected with the first dielectric block and/or the second dielectric block and used for adjusting the resonance mode between the first multimode dielectric resonator and the second multimode dielectric resonator.
2. The dielectric filter of claim 1, further comprising a first dielectric shaft, wherein one end of the first dielectric shaft is fixed to the first surface of the first dielectric block, a groove is formed in a surface of the third dielectric block close to the first dielectric block, when the third dielectric block is connected to the first dielectric block, the other end of the first dielectric shaft is inserted into the groove, and when the third dielectric block rotates relative to the first dielectric block, the first dielectric shaft rotates in the groove.
3. The dielectric filter according to claim 2, further comprising a second dielectric shaft, wherein when the third dielectric block is connected to the first dielectric block, one end of the second dielectric shaft is fixed to the second surface of the first dielectric block, and the other end of the second dielectric shaft is disposed in the groove and can rotate relative to the groove;
wherein the first surface is perpendicular to the second surface;
the first dielectric shaft, the first dielectric block and the third dielectric block are integrally formed.
4. The dielectric filter of claim 1, wherein at least two of the length, width and height of the third dielectric block are different.
5. The dielectric filter according to claim 1, wherein the first dielectric axis is provided at a middle position of a gap between the first dielectric block and the second dielectric block.
6. The dielectric filter of claim 1, wherein the third dielectric block has a cross-sectional shape in an arcuate pattern or a C-shaped pattern.
7. The dielectric filter of claim 6, wherein the arcuate pattern or the C-shaped pattern has a dimension length greater than a half wavelength of an operating frequency of the dielectric filter for reversing a polarity of coupling between the first dielectric resonator and the second dielectric resonator.
8. The dielectric filter of claim 1, wherein the third dielectric block and the metal layer on the surface thereof form a single-mode resonator, and a first window is formed on a contact surface between the first multimode dielectric resonator and the single-mode resonator, so as to realize coupling between the first multimode dielectric resonator and the single-mode resonator; and a second window is arranged on the contact surface of the second multimode dielectric resonator and the single-mode resonator and used for realizing the coupling between the second multimode dielectric resonator and the single-mode resonator.
9. The dielectric filter according to claim 8, further comprising a first adjusting member provided on a surface of the single-mode dielectric resonator for adjusting a resonance frequency of the single-mode resonator;
the dielectric filter further comprises a second adjusting piece and a third adjusting piece, wherein the second adjusting piece is arranged on the first surface of the first multimode dielectric resonator, the third adjusting piece is arranged on the second surface of the second multimode dielectric resonator, and the first surface is perpendicular to the second surface.
10. A communication device, comprising the dielectric filter according to any one of claims 1 to 9 and an antenna, wherein the dielectric filter is coupled to the antenna, and wherein the dielectric filter is configured to filter a transceived signal of the antenna.
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| CNPCT/CN2018/125920 | 2018-12-29 | ||
| CN2018125920 | 2018-12-29 |
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| WO2022120664A1 (en) * | 2020-12-09 | 2022-06-16 | 华为技术有限公司 | Dielectric resonator, dielectric filter, and base station |
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