CN111384496A - Dielectric resonator, dielectric filter and communication equipment - Google Patents

Abstract

The application provides a dielectric resonator, dielectric filter and communication equipment, this dielectric resonator includes dielectric block, lantern ring, nut and tuning screw, is provided with the tuning hole on the surface of dielectric block, and the lantern ring is for the fixed setting of dielectric block, and the nut supports on the lantern ring, and tuning screw inserts and arranges in lantern ring and nut to further extend to in the tuning hole. Because the height of the lantern ring along the axial direction of the tuning hole is adjustable, the actual length of the tuning screw rod which can stretch into the tuning hole is changed, the adjusting range of the tuning screw rod is enlarged, and the adjusting precision of the dielectric resonator is increased.

Description

Dielectric resonator, dielectric filter and communication equipment

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a dielectric resonator, a dielectric filter, and a communication device for a 5G communication system.

Background

At present, wireless communication technology is rapidly developed, and a wireless communication system needs a high-performance dielectric filter, and the main functions of the dielectric filter are frequency selection and filtering. In the 5G communication system, since the number of the transmission and reception channels is increased from 8 of the original 4G communication system to 64 or even 128, the dielectric filter of the 5G communication system has the characteristics of miniaturization, high performance and the like.

The inventor of the application finds that: in the existing dielectric filter, the inner peripheral walls of the lantern ring and the nut are provided with threads, so that the adjusting depth of the tuning screw rod is fixed, the adjusting range of the tuning screw rod is small easily, and the adjusting precision of the filter is low.

Disclosure of Invention

In order to solve the technical problems of the dielectric filter in the prior art, the application provides a dielectric resonator, a dielectric filter and a communication system for a 5G communication system.

In order to solve the above technical problem, the present application provides a dielectric resonator, including:

the tuning structure comprises a dielectric block, a tuning hole and a tuning circuit, wherein one surface of the dielectric block is provided with the tuning hole;

a collar fixedly disposed relative to the dielectric block;

the nut is supported on the lantern ring;

and the tuning screw is inserted in the collar and the nut and further extends into the tuning hole, wherein the height of the collar along the axial direction of the tuning hole is adjustable.

In order to solve the above technical problem, the present application further provides a dielectric filter, where the dielectric filter includes at least two dielectric resonators, and a coupling structure is disposed between two adjacent dielectric resonators.

In order to solve the above technical problem, the present application further provides a communication device, which includes an antenna and the above dielectric filter, wherein the antenna is coupled to the dielectric filter.

The beneficial effect of this application is: be different from prior art's condition, the dielectric resonator of this application includes medium piece, lantern ring, nut and harmonious screw rod, is provided with harmonious hole on the surface of medium piece, and the lantern ring is for the fixed setting of medium piece, and the nut supports on the lantern ring, and harmonious screw rod inserts and arranges in lantern ring and nut to further extend to in the harmonious hole. Because the height of the lantern ring along the axial direction of the tuning hole is adjustable, the actual length of the tuning screw rod which can stretch into the tuning hole is changed, the adjusting range of the tuning screw rod is enlarged, and the adjusting precision of the dielectric resonator is increased.

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 resonator provided in the present application;

FIG. 2 is a schematic diagram of the structure of the dielectric block of FIG. 1;

FIG. 3 is a schematic top view of the dielectric block of FIG. 2;

fig. 4 is a schematic structural diagram of a second embodiment of a dielectric resonator provided in the present application;

fig. 5 is a schematic structural diagram of a third embodiment of a dielectric resonator provided in the present application;

FIG. 6 is a schematic structural view of another embodiment of the collar and nut of FIG. 4;

fig. 7 is a schematic structural diagram of a fourth embodiment of a dielectric resonator provided in the present application;

FIG. 8 is a schematic view of the tuning screw of FIG. 7;

figure 9 is a schematic diagram of a first embodiment of a dielectric filter provided herein;

fig. 10 is a schematic diagram of a first embodiment of a communication device provided herein.

Detailed Description

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments. The terms "first", "second", "third" and "fourth" in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first," "second," "third," and "fourth" may explicitly or implicitly include at least one such feature. In the description of the embodiments of the present application, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of a dielectric resonator provided in the present application.

The dielectric resonator 10 of the embodiment of the application is applied to a 5G communication system, and the dielectric resonator 10 includes a dielectric block 11, a collar 12, a nut 13 and a tuning screw 14.

The dielectric block 11 may be made of a material with light weight, low loss, and high dielectric constant, such as ceramic, glass, or titanate, so that the dielectric resonator 10 has the advantages of small volume, low loss, high frequency, high quality factor, and high temperature stability compared to the conventional metal cavity resonator. The dielectric block 11 can be in a regular shape such as a cylinder, a cube and the like so as to be convenient for production and processing; in other embodiments, the shape may be irregular, and is not limited herein.

The surface of the dielectric block 11 is covered with a metal layer (not shown in the figure), so that the electromagnetic field is confined inside the dielectric block to form standing wave oscillation because the tangential electric field of the metal layer is zero. Wherein, the material of the metal layer can be silver, copper, aluminum, titanium or gold and other metal materials; for example, the metal material may be powder, and may be coated on the surface of the dielectric block 11 by spraying, evaporation, or electroplating, so as to form a metal layer on the surface of the dielectric block 11; the metal material may be a film, and may be formed by coating the surface of the dielectric block 11 with a metal layer by electric welding, hot pressing, or the like.

Further, as shown in fig. 2, a tuning hole 112 is formed on a surface 111 of the dielectric block 11 to change the structure of the dielectric block 11, so that the electromagnetic field in the dielectric block 11 is changed, and the frequency of the dielectric resonator 10 can be changed. In the present embodiment, the tuning hole 112 is a blind hole, and the frequency of the dielectric resonator 10 can be changed by changing the cross-sectional area of the tuning hole 112; alternatively, the frequency of the dielectric resonator 10 is changed by changing the depth of the tuning hole 112. In addition, the tuning hole 112 may be circular in shape and vertically extend from the surface 111 of the dielectric block 11 toward the inside thereof; in other embodiments, the tuning hole 112 may also be rectangular, oval, etc. in shape, and may also extend from the surface 111 of the dielectric block 11 to the inside thereof by other extending manners, such as an arch-shaped extension.

Optionally, the inner surface of the tuning hole 112 is processed to remove burrs and oxide layers, so as to avoid the burrs and oxide layers generated during the processing process from affecting the performance of the dielectric resonator 10.

Specifically, the tuning hole 112 is divided into a first hole section 1121 and a second hole section 1122 from the surface 111 in the axial direction of the tuning hole 112, the first hole section 1121 being used for accommodating the collar 12 and the nut 13, and the second hole section 1122 being used for accommodating the tuning screw 14. The cross section of the first hole segment 1121 perpendicular to the axial direction is larger than the cross section of the second hole segment 1122 perpendicular to the axial direction, so that an annular bearing platform 1123 is formed at the connection position of the first hole segment 1121 and the second hole segment 1122, as shown in fig. 2. The direction indicated by the center line a is the axial direction of the tuning hole 112.

In this embodiment, when the collar 12 and the nut 13 are received in the first hole segment 1121, the collar 12 is supported on the annular supporting platform 1123, and the nut 13 is supported on the collar 12. Compared with the case that the nut 13 is directly supported on the annular bearing platform 1123, in the embodiment, the nut 13 is separated from the dielectric block 11 in the axial direction by the collar 12, so that the nut 13 interacts with the collar 12, and the nut 13 can be prevented from damaging the annular bearing platform 1123 in the process of relative rotation between the nut 13 and the dielectric block 11, thereby prolonging the service life of the dielectric resonator 10.

Optionally, the depth of the first hole segment 1121 is greater than or equal to the sum of the heights of the collar 12 and the nut 13, so that the outer end surface of the nut 13 can be flush with or lower than the surface 111 when the collar 12 and the nut 13 are received in the first hole segment 1121, as shown in fig. 1.

Generally, in the process of assembling the dielectric block 11, the collar 12, the nut 13 and the tuning screw 14 to form the dielectric resonator 10, the collar 12 is first disposed in the first hole segment 1121 and supported on the annular supporting platform 1123, the nut 13 is then disposed in the first hole segment 1121 and supported on the collar 12, the tuning screw 14 is then inserted into the collar 12 and the nut 13 and threadedly engaged with the nut 13, and the tuning screw 14 further extends into the second hole segment 1122, as shown in fig. 1.

The existing lantern ring and nut are often arranged on the surface of the dielectric block, so that the dielectric resonator is easy to have larger thickness and larger volume. In this embodiment, the outer end surface of the nut 13 may be flush with the surface 111 or lower than the surface 111, as shown in fig. 1, so as to prevent the nut 13 and the tuning screw 14 from protruding out of the dielectric block 11, which not only can reduce the thickness of the dielectric resonator 10 and reduce the volume of the dielectric resonator 10, but also can prevent the collar 12, the nut 13 and the tuning screw 14 from colliding with other objects, thereby keeping the relative positions of the collar 12, the nut 13 and the tuning screw 14 and the dielectric block 11 unchanged and further increasing the reliability of the dielectric resonator 10. In other embodiments, when the outer end surfaces of the nut 13 and the tuning screw 14 are higher than the surface 111, the nut 13 and the tuning screw 14 may be made flush with the surface 111 by grinding or the like.

Wherein, the collar 12, the screw 13 and the tuning screw 14 can be made of metal material, for example, the metal material can be silver, copper, aluminum, titanium or gold; the dielectric resonator can also be made by spraying, evaporating or plating a layer of metal material on the surface of ceramic or other materials, so as to prevent the electromagnetic field in the dielectric resonator 10 from leaking through the lantern ring 12, the screw 13 and the tuning screw 14, thereby improving the reliability of the dielectric resonator 10.

In the present embodiment, the tuning screw 14 is used to adjust the frequency of the dielectric resonator 10. By using the principle of resonant cavity perturbation, when the cross-sectional area of the tuning hole 112 is fixed, the electromagnetic field in the dielectric block 11 can be changed by adjusting the length of the tuning screw 14 extending into the tuning hole 112, so as to adjust the frequency of the dielectric resonator 10. Wherein, the longer the tuning screw 14 is located in the tuning hole 112, the lower the frequency of the dielectric resonator 10; conversely, the shorter the length of the tuning screw 14 within the tuning bore 112, the higher the frequency of the dielectric resonator 10.

Alternatively, the tuning screw 14 and the collar 12 may be chamfered or rounded at the sharp corner where the performance of the dielectric resonator 10 is greatly affected.

Referring collectively to fig. 2 and 3, fig. 3 is a top view of the dielectric block 11 of fig. 2.

In this embodiment, the first hole section 1121 is further divided into a first sub-hole section 1124 and a second sub-hole section 1125 in the axial direction from the surface 111, the first sub-hole section 1124 being close to the surface and adapted to receive the nut 13, and the second sub-hole section 1125 being close to the second hole section 1122 and adapted to receive the collar 12.

The cross-sectional shape of the collar 12 perpendicular to the axial direction is a circular shape, and the cross-sectional shape of the nut 13 perpendicular to the axial direction is a polygonal shape, for example, the nut 13 is a regular hexagon. Accordingly, the cross-sectional shape of first sub-bore section 1124 perpendicular to the axial direction is a polygonal arrangement matching nut 13, for example, the cross-sectional shape of first sub-bore section 1124 perpendicular to the axial direction is also a regular hexagon, and the cross-sectional shape of second sub-bore section 1125 perpendicular to the axial direction is a circular arrangement matching collar 12, as shown in fig. 3. This not only increases the structural compactness of the dielectric resonator 10, but also increases the fixing effect of the collar 12 and the nut 13 in the dielectric block 11, thereby increasing the reliability of the dielectric resonator 10. In other embodiments, the first sub-hole section 1124 and the second sub-hole section 1125 may be both polygonal or circular, for example, both circular, and the matching of the collar 12 and the nut 13 with the first sub-hole section 1124 and the second sub-hole section 1125 may also provide the dielectric resonator 10 with better compactness and reliability.

Optionally, the depth of the first sub-hole section 1124 is greater than or equal to the height of the nut 13, the depth of the second sub-hole section 1125 is less than or equal to the height of the collar 12, and the second sub-hole section 1125 arranged in a circle is inscribed in or less than the first sub-hole section 1124 arranged in a polygon, as shown in fig. 3, so that when the collar 12 is accommodated in the second sub-hole section 1125 and supported on the bearing platform 1123, the collar 12 partially protrudes from the second sub-hole section 1125, so that when the nut 13 is accommodated in the first sub-hole section 1124, the nut 13 can be supported on the collar 12, which can increase the force bearing area of the nut 13 and avoid the occurrence of abnormal movement of the collar 12, thereby increasing the reliability and compactness of the dielectric resonator 10.

The present application further provides a second embodiment of the dielectric resonator, which is described on the basis of the dielectric resonator disclosed in the first embodiment. As shown in fig. 4 and 1, the inner circumferential wall 121 of the collar 12 is smooth.

The internal perisporium of current lantern ring and nut all sets up the screw thread, and in the in-process of adjusting is carried out in the cooperation of tuning screw and nut, it is great to lead to the wearing and tearing volume of tuning screw rod easily to influence dielectric resonator's performance. In this embodiment, the inner peripheral wall 121 of the collar 12 is designed to be a smooth surface, which can reduce the total number of threads, thereby effectively reducing the wear amount of the tuning screw 14, and avoiding excessive grinding from falling into the tuning hole 112, thereby increasing the reliability of the dielectric resonator 10.

Further, the inner diameter of the collar 12 is smaller than the inner diameter of the second hole section 1122, and the collar 12 is further provided with an annular flange 122, and the annular flange 122 is used for inserting the collar 12 into the second hole section 1122, so that the contact area of the collar 12 and the inner peripheral wall of the tuning hole 112 can be increased, and the electromagnetic field leakage in the dielectric resonator 10 can be avoided.

Optionally, a transition fit or an interference fit is formed between the collar 12 and the inner peripheral wall of the first hole segment 1121, and a transition fit or an interference fit is formed between the flange 122 and the inner peripheral wall of the second hole segment 1122, so that the collar 12 and the flange 122 are relatively fixed to the dielectric block 11, and gaps between the collar 12 and the flange 122 and the dielectric block 11 are reduced, so that the contact between the collar 12 and the flange 122 and the dielectric block 11 is increased, and further, the electromagnetic field leakage in the dielectric resonator 10 is avoided. In other embodiments where the collar 12 and the nut 13 are disposed on the surface of the dielectric block 11, the collar 12 and the nut 13 are not located in the tuning hole 112, and during the process of screwing the nut 13 and the tuning screw 14 together, the collar 12 can be pressed against the dielectric block 11 by the nut 13, so that the collar 12 and the dielectric block 11 are relatively fixed.

The present application further provides a third embodiment of the dielectric resonator, which is described on the basis of the dielectric resonator disclosed in the second embodiment. As shown in fig. 5 and fig. 1, the height of the collar 12 in the axial direction is adjustable, for example, the collar 12 is made of an electrostrictive material such as piezoelectric ceramic or electroactive polymer, and in the energized state, the height of the collar 12 in the axial direction is adjustable, so that the actual length of the tuning screw 14 that can extend into the second hole section 1122 is changed, and thus the tuning screw 14 has different adjustment depths, thereby increasing the adjustment accuracy of the dielectric resonator 10. In other embodiments, the number of the collars 12 is multiple, and the heights of the collars 12 along the axial direction are different, so that the collars 12 with different heights are selected to support the nut 13 according to different adjustment requirements. Accordingly, the number of the nuts 13 is plural, and the heights of the plural nuts 13 in the axial direction are different, so that the nuts 13 of the corresponding heights are selected according to the selected collar 12, so that the overall height of the selected collar 12 and the nuts 13 is less than or equal to a preset height value.

It should be noted that the preset height value may be less than or equal to the depth of the first hole segment 1121, so that the overall height of the collar 12 and the nut 13 is selected to be less than or equal to the depth of the first hole segment 1121, which can prevent the nut 13 from protruding out of the dielectric block 11, thereby reducing the volume of the dielectric resonator 10 and increasing the reliability of the dielectric resonator 10.

Threads are arranged on the inner peripheral walls of the existing lantern ring and the nut, so that the adjusting depth of the tuning screw is fixed; for example, the adjustment depth may be the depth of the tuning hole or the length of the tuning screw, which easily results in a small adjustment range of the tuning screw, resulting in low adjustment accuracy of the dielectric resonator. The inner peripheral wall 121 of the collar 12 in this embodiment is a smooth surface, so that the actual threads of the collar 12 and the nut 13 are only the threads of the nut 13, and the actual length of the tuning screw 14 that can extend into the second hole section 1122 should also be reduced by the height of the collar 12. Therefore, under the condition that the overall height of the collar 12 and the nut 13 is constant, the collar 12 and the nut 13 with different heights have threads with different heights, so that the actual length of the tuning screw 14 which can extend into the second hole section 1122 is changed, the tuning screw 14 has different adjusting depths, and the adjusting precision of the dielectric resonator 10 is increased. For example, the smaller the height of the collar 12, the greater the height of the nut 13, so that the longer the actual length of tuning screw 14 that can enter the tuning hole 112, the lower the frequency of the dielectric resonator 10; conversely, the greater the height of the collar 12, the smaller the height of the nut 13, so that the shorter the actual length of tuning screw 14 that can enter the tuning hole 112, the greater the frequency of the dielectric resonator 10.

In this embodiment, the collar 12 may be provided as a standard piece with different heights, for example, the height of the collar 12 may be 1.0mm, 1.5mm, 2.0mm, 2.5mm, etc., so that the collar 12 has a plurality of selectable support depths for supporting the nut 13; accordingly, the nut 13 may be provided as a standard piece having a height, for example, the height of the nut 13 may be 2.0mm, 2.5mm, 3.0mm, 3.5mm, etc., so that the nut 13 has a plurality of selectable adjustment depths for cooperating with the tuning screw 14. During the assembly or debugging of the dielectric resonator 10, the actual length of the tuning screw 14 extending into the second hole section 1122 can be changed by selecting the collar 12 with different heights to support the nut 13 and selecting the nut 13 with the corresponding height to cooperate with the tuning screw 14 for adjustment, thereby increasing the adjustment accuracy of the dielectric resonator 10. In other embodiments, a plurality of collars 12 with the same or different heights may be combined and used, or a plurality of nuts 13 with the same or different heights may be combined and used, so as to further increase the adjustment accuracy of the dielectric resonator 10.

In this embodiment, the nut 13 and the collar 12 may be separate members, so that the collar 12 or the nut 13 may be easily replaced after being damaged, thereby reducing the manufacturing cost of the dielectric resonator 10 to some extent. In other embodiments, as shown in fig. 6, the collar 12 and the nut 13 may also be an integrally formed component, and a portion of the integrally formed component close to the second hole section 1122 is the same as or similar to the structure of the collar 12, and a portion of the integrally formed component far from the second hole section 1122 is the same as or similar to the structure of the nut 13, so that the structure of the dielectric resonator 10 can be simplified, and the electromagnetic field in the dielectric resonator 10 can be prevented from leaking through the gap between the nut 13 and the collar 12.

Alternatively, the integral member may be manufactured by partially tapping or the like the pipe, block or the like, so that one part thereof is smoothly arranged, similar to the collar 12, and the other part thereof is threadedly arranged, similar to the nut 13, and the integral member has a simple process and a reliable structure. Further, by reasonably controlling the tapping depth, the integrally formed member can be provided with a combination of smooth parts and threaded parts with different depths, namely the integrally formed member can be provided with various selectable supporting depths and adjusting depths, and similarly, the integrally formed member with different supporting depths and adjusting depths can be set into a standard piece for convenient use.

Optionally, the total height of the integrally formed member is less than or equal to the depth of the first hole segment 1121, so as to prevent the integrally formed member from protruding out of the dielectric block 11 when the integrally formed member is received in the first hole segment 1121, thereby reducing the volume of the dielectric resonator 10 and increasing the reliability of the dielectric resonator 10.

The present application further provides a fourth embodiment of the dielectric resonator, which is described on the basis of the dielectric resonator disclosed in the third embodiment. As shown in fig. 7 to 8, the tuning screw 14 is divided into a first rod section 141 and a second rod section 142 along the axial direction, the cross section of the first rod section 141 perpendicular to the axial direction is smaller than the cross section of the second rod section 142 perpendicular to the axial direction, the first rod section 141 is inserted into the collar 12 and the nut 13, and the second rod section 142 is inserted into the second hole section 1122.

The existing tuning screw is of an equal-diameter structure, and an electromagnetic field in the dielectric resonator is easy to leak. In the present embodiment, the second rod section 142 of the tuning screw 14 near the bottom wall of the tuning hole 112 is designed to be thicker than other parts, as shown in fig. 7, so that the gap between the tuning screw 14 and the inner peripheral wall of the tuning hole 112 can be reduced, thereby preventing the electromagnetic field in the dielectric resonator 10 from leaking.

Optionally, a gap between the second rod segment 142 and the inner peripheral wall of the second hole segment 1122 is less than or equal to a preset value; for example, the second rod section 142 and the inner peripheral wall of the second hole section 1122 are in a clearance fit or transition fit relationship, so that not only can the electromagnetic field in the dielectric resonator 10 be prevented from leaking, but also the coaxiality between the tuning screw 14 and the collar 12, the nut 13 and the dielectric block 11 can be increased, and thus the adjustment precision of the tuning screw 14 can be increased.

Further, during adjustment of the tuning screw 14 in cooperation with the nut 13, the tuning screw 14 and the collar 12 are adjacent to the bottom wall of the tuning hole 112; for example, the portion of the tuning screw 14 extending into the second bore section 1122 and the portion of the tuning screw 14 engaging with the collar 12 have a large influence on parameters such as the loss of the dielectric resonator 10. For this reason, as shown in fig. 7, in the present embodiment, the tuning screw 14 and the portion of the collar 12 adjacent to the bottom wall of the tuning hole 112 are designed to be smooth surfaces to optimize parameters such as loss, thereby improving the performance index of the dielectric resonator 10.

In this embodiment, the peripheral wall of the first rod section 141 is of smooth design from a predetermined position point, which is maintained above the lower end surface of the collar 12 during adjustment of the tuning screw 14, to the junction of the first rod section 141 and the second rod section 142. Meanwhile, the outer circumferential surface of the second rod section 142 is of a smooth design.

It should be noted that the predetermined position point may be a root portion of the first rod section 141 near the second rod section 142, and the specific position may be designed in advance according to the performance index of the dielectric resonator 10, and it is ensured that the threaded portion of the first rod section 141 does not extend into the second hole section 1122 during the adjustment process of the tuning screw 14.

For example, the first rod segment 141 includes a threaded section 1411 and a smooth section 1412, and the smooth section 1412 is adjacent to the second rod segment 142, as shown in fig. 8, the lengths of the threaded section 1411 and the smooth section 1412 can be designed in advance according to the performance index of the dielectric resonator 10, and it is ensured that the threaded section 1411 does not extend into the second hole section 1122 during the adjustment process of the tuning screw 14. The threaded section 1411 is in threaded fit with the nut 13, and the smooth section 1412 is in clearance fit or transition fit with the collar 12, so that the influence of the threaded section 1411 on parameters such as loss of the dielectric resonator 10 can be reduced, the coaxiality between the tuning screw 14 and the collar 12 and the nut 13 can be increased, and the adjustment accuracy of the tuning screw 14 is increased.

Generally, in the process of assembling the dielectric block 11, the collar 12, the nut 13 and the tuning screw 14 to form the dielectric resonator 10, the collar 12 is firstly sleeved on the tuning screw 14, and then the nut 13 is screwed into the tuning screw 14 through thread fit, at this time, the collar 12 and the nut 13 are located on the first rod section 141, for example, the collar 12 is located on the smooth section 1412, and the nut 13 is located on the threaded section 1411. The assembled collar 12, nut 13 and tuning screw 14 are then inserted into the tuning hole 112 of the dielectric block 11, with the collar 12 and nut 13 in the first hole segment 1121 and the second rod segment 142 in the second hole segment 1122. Further, by using the principle of the cavity perturbation, when the cross-sectional area of the tuning hole 112 is fixed, the length of the tuning screw 14 extending into the tuning hole 112 can be adjusted by screwing in or out the tuning screw 14 to change the electromagnetic field in the dielectric block 11, thereby adjusting the frequency of the dielectric resonator 10.

Further, after the tuning screw 14 is adjusted, the collar 12, the nut 13, and the tuning screw 14 may be locked with the dielectric block 11 by the thread fit between the nut 13 and the tuning screw 14, so that the relative positional relationship therebetween is kept unchanged, thereby increasing the stability of the dielectric resonator 10 in performance indexes.

Optionally, after the tuning screw 14 is adjusted, the part of the tuning screw 14 protruding out of the dielectric block 11 may be removed by grinding or the like, so that the tuning screw 14 is flush with the dielectric block 11, which not only can reduce the height of the dielectric resonator 10, thereby reducing the volume thereof, but also can protect the tuning screw 14 from colliding with other objects, thereby keeping the relative positions of the tuning screw 14, the collar 12, and the nut 13 with the dielectric block 11 unchanged, and further increasing the reliability of the dielectric resonator 10. In other embodiments, the lengths of the tuning screws 14 may be calculated in advance by means of simulation, so that an assembler or a debugger may select the corresponding tuning screws 14 according to the calculation result, and after the tuning screws 14 are adjusted, the tuning screws 14 are slightly higher than, flush with, or slightly lower than the dielectric block 11, which not only reduces the volume of the dielectric resonator 10 and increases the reliability of the dielectric resonator 10, but also avoids the influence of processing operations such as grinding on the adjustment accuracy, and further increases the reliability of the dielectric resonator 10.

Referring to fig. 9, fig. 9 is a schematic diagram of a first embodiment of a dielectric filter provided in the present application.

The dielectric filter 20 of the embodiment of the application is applied to a 5G communication system, the dielectric filter 20 includes at least two dielectric resonators 21, a coupling structure 22 is disposed between two adjacent dielectric resonators 21, and the coupling structure 22 is used for connecting two adjacent dielectric resonators 21.

The dielectric resonator 21 may be any one of the dielectric resonators disclosed in the above embodiments, and will not be described herein again.

In this embodiment, the dielectric blocks of at least two dielectric resonators 21 are integrally formed members to prevent leakage of the electromagnetic field in the dielectric filter 20.

Optionally, at least two dielectric resonators 21 may be connected to the coupling structure 22 in a series manner, may also be connected to the coupling structure 22 in a parallel manner, and may also be connected to the coupling structure 22 in a series and parallel manner at the same time, so as to achieve different performance indexes, such as frequency and bandwidth, to meet different usage requirements, thereby increasing the application range of the dielectric filter 20.

Further, the coupling structure 22 may be similar to the structure of the dielectric resonator 10 disclosed in any of the above embodiments, and is not described herein again. For example, the coupling structure 22 also includes a coupling hole, a collar, a nut and a coupling screw, the coupling hole has the same structure as the tuning hole 112, and the collar and the nut are disposed in the coupling hole to reduce the volume of the dielectric filter 20 and avoid the nut and the collar from colliding with other objects, thereby increasing the reliability of the dielectric filter 20; a coupling screw is inserted into the collar and the nut and cooperates with the nut to adjust a coupling parameter of the coupling structure 22, which may be, for example, a bandwidth.

Referring to fig. 10, fig. 10 is a schematic diagram of a first embodiment of a communication device provided in the present application.

The communication device 30 of this embodiment is applied to a 5G communication system, and the communication device includes an antenna 31 and a dielectric filter 32, where the antenna 31 is coupled to the dielectric filter 32, and the dielectric filter 32 may be the dielectric filter disclosed in any of the above embodiments, and is not described herein again.

The communication device 30 may be a base station or a terminal for a 5G communication system, and the terminal may specifically be a mobile phone, a tablet computer, a wearable device, and the like with a 5G communication function.

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.

Be different from prior art's condition, this application is through setting up lantern ring and nut in first hole section to avoid nut and lantern ring protrusion in the dielectric block, so not only can reduce dielectric resonator thickness in the axis direction, thereby reduce dielectric resonator's volume, can also avoid lantern ring, nut and tuning screw rod and other objects to bump, thereby increase dielectric resonator's reliability.

Further, the inner peripheral wall of the lantern ring is designed to be a smooth surface in the application, the total number of threads can be reduced, the abrasion loss of the tuning screw rod is effectively reduced, excessive grinding is avoided falling into the tuning hole, and the reliability of the dielectric resonator is further improved.

Furthermore, the height of the lantern ring in the axial direction is adjustable, so that the actual length of the tuning screw rod, which can extend into the tuning hole, can be changed, the adjusting range of the tuning screw rod is increased, and the adjusting precision of the dielectric resonator is further increased.

Furthermore, the tuning screw rod is divided into a first rod section and a second rod section along the axial direction of the tuning hole in the application, the cross section of the first rod section perpendicular to the axial direction is smaller than that of the second rod section perpendicular to the axial direction, so that the gap between the tuning screw rod and the dielectric block is reduced, the leakage of an electromagnetic field in the dielectric resonator can be avoided, the coaxiality between the tuning screw rod and the dielectric block can be increased, and the adjusting precision of the tuning screw rod is improved.

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.

Claims (10)

1. A dielectric resonator, characterized in that the dielectric resonator comprises:

the tuning structure comprises a dielectric block, a tuning hole and a tuning circuit, wherein the tuning hole is formed in one surface of the dielectric block;

a collar fixedly disposed relative to the dielectric block;

a nut supported on the collar;

and the tuning screw is inserted into the collar and the nut and further extends into the tuning hole, wherein the height of the collar along the axial direction of the tuning hole is adjustable.

2. The dielectric resonator of claim 1, wherein the collar is made of a piezoelectric ceramic or an electroactive polymer, and a height of the collar in the axial direction is adjustable in an energized state.

3. The dielectric resonator according to claim 1, wherein the number of the collars is plural, heights of the collars in the axial direction are different, so that the collars with different heights are selected to support the nut according to different adjustment requirements, the number of the nuts is plural, heights of the nuts in the axial direction are different, so that the nuts with corresponding heights are selected according to the selected collars, and the overall height of the selected collars and the nuts is smaller than or equal to a preset height value.

4. The dielectric resonator of claim 1, wherein the tuning hole is divided from the surface into a first hole section and a second hole section along an axial direction of the tuning hole, wherein a cross section of the first hole section perpendicular to the axial direction is larger than a cross section of the second hole section perpendicular to the axial direction, so as to form an annular bearing platform at a junction of the first hole section and the second hole section, the collar is disposed in the first hole section and supported on the annular bearing platform, the nut is disposed in the first hole section and supported on the collar, and the tuning screw further extends into the second hole section.

5. The dielectric resonator according to claim 1, wherein an outer end surface of the nut is disposed flush with or lower than the surface, the tuning screw is divided into a first rod section and a second rod section along the axial direction, a cross section of the first rod section perpendicular to the axial direction is smaller than a cross section of the second rod section perpendicular to the axial direction, the first rod section is inserted into the collar and the nut, the second rod section is inserted into the second hole section, and an outer peripheral surface of the second rod section is smooth; or the inner peripheral wall of the lantern ring is of a smooth design, the outer peripheral wall of the first rod section is of a smooth design from a preset position point to the joint of the first rod section and the second rod section, and the preset position point is always kept above the lower end face of the lantern ring in the adjusting process of the tuning screw rod.

6. The dielectric resonator of claim 4, wherein an inner diameter of the collar is smaller than an inner diameter of the second hole section, and the lower end surface of the collar is further provided with an annular flange inserted into the second hole section.

7. The dielectric resonator of claim 4, wherein the collar and the nut are integrally formed.

8. The dielectric resonator of claim 4, wherein a cross-sectional shape of the nut perpendicular to the axial direction is a polygonal arrangement, a cross-sectional shape of the collar perpendicular to the axial direction is a circular arrangement, the first hole section is further divided from the surface along the axial direction into a first sub-hole section and a second sub-hole section, wherein the cross-sectional shape of the first sub-hole section perpendicular to the axial direction is a polygonal arrangement matching the nut, and the cross-sectional shape of the second sub-hole section perpendicular to the axial direction is a circular arrangement matching the collar.

9. A dielectric filter comprising at least two dielectric resonators as claimed in any one of claims 1 to 8, a coupling structure being provided between adjacent ones of said dielectric resonators.

10. A communication device, characterized in that the communication device comprises an antenna and a dielectric filter according to claim 9, the antenna being coupled to the dielectric filter.

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