WO2012022062A1

WO2012022062A1 - Dielectric filter, dielectric resonator, cover unit and communication device

Info

Publication number: WO2012022062A1
Application number: PCT/CN2010/077409
Authority: WO
Inventors: 孙尚传; 申风平; 吴文敬
Original assignee: 深圳市大富网络技术有限公司
Priority date: 2010-08-18
Filing date: 2010-09-28
Publication date: 2012-02-23
Also published as: CN102148417A; CN102148417B

Abstract

Embodiments of the present invention disclose a dielectric resonator and its cover unit. The dielectric resonator comprises a cavity body, a cover unit and a dielectric resonant column, wherein, the cover unit envelops the cavity body to form a resonant cavity; the dielectric resonant column is placed in the resonant cavity with its lower end contacting the cavity body; the cover unit includes an upper cover, a lower cover set under the upper cover and a resilient component set between the upper cover and the lower cover; by the shape change of the resilient component, pressure is brought to the lower cover, which makes the lower cover closely contact the upper end of the dielectric resonant column. Moreover, the embodiments of the present invention also disclose a dielectric filter and a communication device using the dielectric filter. By using the above dielectric resonator, performance index of the communication device and its dielectric filter can be greatly optimized.

Description

Dielectric filter, dielectric resonator and cover unit and communication device

[Technical Field]

The present invention relates to the field of dielectric filter technologies, and in particular, to a dielectric resonator and a cover unit thereof, and to a dielectric filter using the dielectric resonator and a communication device using the dielectric filter.

【Background technique】

As a frequency selection device, dielectric filters are widely used in the field of communications, especially in the field of radio frequency communication. In the base station, a filter is used to select a communication signal to filter out clutter or interference signals outside the frequency of the communication signal.

The dielectric filter is designed and manufactured by the dielectric ceramic material with low loss, high dielectric constant, small temperature coefficient of temperature, small thermal expansion coefficient, and high power consumption. It is characterized by low insertion loss and high power resistance.

Referring to Figure 1, there is shown a schematic diagram of a prior art TM (transverse magnetic) mode dielectric filter 100. The dielectric filter 100 is mainly composed of a dielectric resonator 101 and a metal cavity 102. It is important to maintain good contact between the upper and lower end faces of the dielectric resonator column in the TM mode dielectric filter, otherwise the performance of the filter will be affected. In order to ensure reliable contact between the upper surface of the dielectric resonator column and the cover. One solution is to mount the dielectric resonator column in the dielectric filter in the cavity, and the other end of the dielectric resonator column is connected to the cover through the elastic body.

In the research process of the prior art, the inventors of the present invention have found that, in the above prior art: since the elastic object is in direct contact with the dielectric resonator column, the contact surface becomes an irregular surface after compression deformation, resulting in poor contact, and The elastic object is located inside the cavity, and the size changes during the high and low temperature test, which causes the performance index of the filter to change.

[Summary of the Invention]

In order to solve the problem of poor contact between the dielectric resonator column and the cover plate in the prior art, the embodiment of the present invention provides A dielectric filter of a new structure is provided. Meanwhile, an embodiment of the present invention further provides a dielectric resonator, a communication device, and a cover unit thereof.

The technical solution adopted by the embodiments of the present invention to solve the above technical problems is to provide a dielectric resonator including a cavity, a cover unit, and a dielectric resonator. The cover unit covers the cavity to form a resonant cavity, and the dielectric resonator column is disposed in the resonant cavity, and a section of the dielectric resonant column is in contact with the cavity. Wherein, the cover unit comprises an upper cover, a lower cover disposed under the upper cover, and an elastic member disposed between the upper cover and the lower cover, the deformation of the elastic member is given to the lower The cover plate applies pressure to bring the lower cover into close contact with the other end of the dielectric resonator column.

The embodiment of the present invention further provides a cover unit, which is applied to the above dielectric resonator, the cover unit includes an upper cover, a lower cover disposed under the upper cover, and the upper cover and the cover An elastic member between the lower covers.

Embodiments of the present invention also provide a dielectric filter including a plurality of the above dielectric resonators.

The embodiment of the present invention further provides a communication device, which includes the above-mentioned dielectric filter, and the dielectric filter is disposed in a signal transmitting and receiving circuit portion of the communication device for selecting a signal.

The cover unit provided by the embodiment of the invention includes two upper and lower cover plates, and the elastic member is disposed between the two cover plates, and a deformation is applied to the lower cover plate by deformation of the member, so that the lower cover plate can be coupled with the dielectric resonance column. The body is in close contact, and the dimensional accuracy requirements for the cavity and dielectric resonator are also reduced. In addition, the elastic member can also give the lower cover a sufficient elastic force in the case where the cover plate is elastically deteriorated after being repeatedly disassembled, and the close contact between the lower cover and the dielectric resonator is ensured.

[Description of the Drawings]

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described. 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. Further, the drawings are not drawn to scale. among them

Figure 1 shows a schematic diagram of a dielectric filter in the prior art;

2 is a cross-sectional view showing a dielectric resonator and a cover thereof in accordance with a preferred embodiment of the present invention; 3 is a cross-sectional view showing a dielectric resonator and a cover thereof in accordance with another preferred embodiment of the present invention;

Figure 4 is a cross-sectional view showing a dielectric resonator and a cover thereof in accordance with another preferred embodiment of the present invention;

Figure 5 is a view showing the structure of the cover unit of the dielectric resonator shown in Figure 4;

Figure 6 is a cross-sectional view showing a dielectric filter in accordance with a preferred embodiment of the present invention;

7 is a schematic structural view of an integral cover unit of the dielectric filter shown in FIG. 6; and FIG. 8 is a schematic cross-sectional view showing a dielectric filter according to another preferred embodiment of the present invention; FIG. 9 shows another A schematic cross-sectional view of a dielectric filter of a preferred embodiment; FIG. 10 is a partial cross-sectional view showing the cover of the dielectric filter of FIG. 9;

11a and lib show schematic cross-sectional views of a dielectric filter in accordance with still another preferred embodiment of the present invention;

Figure 12 is a cross-sectional view showing a dielectric filter according to still another preferred embodiment of the present invention; and Figure 13 is a cross-sectional view showing a dielectric filter according to still another preferred embodiment of the present invention.

【detailed description】

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Embodiments of the present invention provide a dielectric resonator. The dielectric resonator includes a cavity, a cover unit, and a dielectric resonator. The cover unit covers the cavity to form a resonant cavity, and the dielectric resonator column is disposed in the resonant cavity, and one end of the dielectric resonant column is in contact with the cavity. Wherein, the cover unit comprises an upper cover, a lower cover disposed under the upper cover, and an elastic member disposed between the upper cover and the lower cover, the deformation of the elastic member is given to the lower The cover plate applies pressure, and the lower cover plate is slightly elastically deformed, so that the other end of the dielectric resonator column is in good contact with the lower cover plate and is elastically pressed and tightly fitted. Medium resonant column Good contact between the upper surface and the cover plate improves filter performance.

The dielectric resonator provided by the present invention will be described in detail below with reference to the embodiments.

Embodiment 1 A dielectric resonator. Referring to Figure 2, there is shown a cross-sectional view of a dielectric resonator 200 and its cover unit 220 in accordance with a preferred embodiment of the present invention. As shown in FIG. 2, the dielectric resonator 200 includes a cavity 210, a cover unit 220, and a dielectric resonator column 230.

The cover unit 220 covers the cavity 210 to form a resonant cavity 240. The dielectric resonant column 230 is disposed in the resonant cavity 240. One end of the dielectric resonant column 230 is in contact with the cavity 210. The unit 220 includes an upper cover 222 and a lower cover 224, and an elastic member 250 disposed between the upper cover 222 and the lower cover 224, and the lower cover is deformed by the elastic member 250. 224 is applied to bring the lower cover 224 into close contact with the other end of the dielectric resonator 230. It should be noted that, in order to facilitate the understanding of the present invention, the present embodiment and FIG. 2 are described by a single cavity structure. In practical applications, the technical solution of the embodiment can be extended to a cavity filter of a multi-cavity structure.

In this embodiment, as a possible implementation, a large integrated recessed area 223 may be disposed at an intermediate portion of the lower surface of the upper cover 222, and the elastic member 250 is disposed in the recessed area 223 and slightly protrudes from the The recessed portion 223 can press the elastic member upward when the cover unit 220 is capped to the cavity 210 by a fixing screw 212 (or other fixing means such as snapping, riveting, crimping) 250 and a certain elastic deformation. According to the dielectric resonator 200 of the present embodiment, a double-layered cover is used, and an elastic member is added between the two cover plates, and the cover plate is brought into close contact with the dielectric resonator column 230 by the elasticity of the elastic member. Of course, in this embodiment, the recessed area 223 may also be disposed on the lower cover. The manner in which the elastic member is specifically disposed does not constitute a limitation of the present invention.

In a preferred embodiment, the height h of the dielectric resonator column is slightly larger than the height H of the cavity (the difference in height values is small, and the visual difference is not shown in the figure). In addition, the thickness of the lower cover 224 can be relatively thin relative to the upper cover 222. On the one hand, the strength requirement of the lower cover is reduced due to the protection of the upper cover, and the relatively thin lower cover can further save cost, and at the same time The invention has an increased requirement for the elasticity of the lower cover, so that a relatively thin lower cover will have a better technical effect.

It can be understood that after the entire dielectric resonator is assembled, the cover unit 220 is elastically deformed, It can always maintain a certain contact with the dielectric resonator column 230, so that a certain pressure is maintained between the upper surface of the resonator column and the cover plate. Meanwhile, since the elastic member 250 is disposed in the recessed region 223 and partially protrudes from the recessed region, the pressure applied by the elastic member 250 causes the lower cover 224 to be slightly deformed while being pressed simultaneously on the upper and lower surfaces, by appropriately setting the elastic member. The pressing position of the 250 pair of lower cover plates 224 allows the lower cover plate 224 to completely contact the top surface of the dielectric resonator column 230, thereby avoiding line contact.

In a preferred embodiment, the lower surface of the dielectric resonator 230 is metallized, and the lower surface of the dielectric resonator 230 is soldered to the metal mount 232. The metal mount 232 is fixed to the bottom surface of the cavity by screws to make the medium. The grounded conduction is achieved on the lower surface of the resonant column 230. Of course, the connection between the dielectric resonator column and the inner bottom surface of the cavity can also be obtained by various conventional methods, such as: directly soldering the lower surface of the dielectric resonator column to the inner surface of the cavity or fixing the dielectric resonator column to the inner surface of the cavity by screws. The specific fixing manner does not constitute a limitation of the present invention.

Referring again to the first embodiment shown in Fig. 2, it shows an example in which the elastic member 250 is an elastic piece. In this embodiment, the elastic member 250 is an integral annular elastic piece, and the annular elastic piece outer edge 252 is in close contact with the upper cover plate 222, and the annular elastic piece intermediate portion 254 is recessed downward and the lower cover The inner edge 256 of the annular elastic piece is adjacent to the upper cover plate 222, so that the lower cover plate 224 can be elastically deformed under the contact pressure of the intermediate portion 254 of the annular elastic piece, thereby closely contacting the medium. Resonant column 230. Of course, those skilled in the art will readily appreciate that the above-mentioned recessed regions 223 may also be in a discrete arrangement, and the corresponding annular elastic sheets may also be in a discrete arrangement, or the recessed regions 223 may be integrated. A plurality of annular elastic pieces are provided.

It is worth mentioning that the annular elastic piece is fixed in the recessed area 223 of the upper cover 222 and can be fixed by welding or bonding.

In addition, the cover unit 220 is provided with a fixing hole at the edge thereof, and is fixed to the cavity 210 by a fixing screw 212. The cover unit 220 is provided with a through hole at a position corresponding to the resonant column for assembling the tuning screw 260.

The arrangement of the elastic members is not limited to the structure of the embodiment of Fig. 2. The arrangement of the dielectric resonators of the other preferred embodiments and their elastic members will be described below with reference to Figs. 3 and 4.

3 is a cross-sectional view showing a dielectric resonator and a cover thereof according to another preferred embodiment of the present invention. Figure. As shown in FIG. 3, the dielectric resonator 300 includes a cavity 310, a cover unit 320, and a dielectric resonator column 330.

The cover unit 320 covers the cavity 310 to form a resonant cavity 340. The dielectric resonant column 330 is disposed in the resonant cavity 340. The lower end of the dielectric resonant column 330 is in contact with the cavity 310. The dielectric resonant column 330 The upper end is in contact with the cover unit 320. A through hole is provided in the middle of the cover unit 320 for mounting the tuning screw 360. The lower surface of the dielectric resonator column 330 is metallized. The lower surface of the dielectric resonator column 330 is soldered to the metal mount 332. The metal mount 332 is fixed to the bottom surface of the cavity by screws, so that the ground surface of the dielectric resonator column 330 is grounded. through. The cover unit 320 includes an upper cover 322 and a lower cover 324 and an elastic member 350 disposed therebetween. The lower cover 324 is relatively thin, and the upper portion of the upper cover 322 has a recessed area 323, and the recessed area 323 is further provided with an annular groove 325. The elastic member 350 is an annular elastic washer disposed in the annular groove 325 and slightly protruding from the annular groove 325 and the recessed area 323. In the assembled condition, the lower cover 324 is elastically deformed by the upper cover 322 and the elastic washer 350 to closely contact the upper end of the dielectric resonator 330.

Similarly, those skilled in the art will readily appreciate that the above-mentioned annular groove 325 may also be replaced with a plurality of recesses provided in discrete forms. In this case, the elastic washer may be replaced by a plurality of elastic spheres disposed discretely, and the plurality of elastic spheres are disposed on The recessed portion protrudes slightly from the recessed portion and the recessed portion 323. When the cover unit 320 is closed by the fixing screw 312 to the cavity 310 and abuts against the dielectric resonator column 330, the upper cover plate 322 passes through multiple elastic portions. The ball presses the lower cover plate 324 to cause a certain elastic deformation to be in close contact with the dielectric resonator column 330.

4 shows a cross-sectional schematic view of a dielectric resonator including a cavity 410, a cover unit 420, and a dielectric resonator 430, in accordance with another preferred embodiment of the present invention.

The embodiment is substantially the same as the embodiment shown in FIG. 2 and FIG. 3, wherein the cover unit 420 covers the cavity 410 to form a resonant cavity 440. The dielectric resonant column 430 is disposed in the resonant cavity 440. The lower end of the column 430 is in contact with the cavity 410. The upper end of the dielectric resonator column 430 is in contact with the cover unit 420, and the lower surface of the dielectric resonator column 430 is metallized. The lower surface of the dielectric resonator column 430 is metal-welded. a mounting seat 432, the metal mounting seat 432 is fixed to the bottom surface of the cavity by screws, so that Ground conduction is achieved on the lower surface of the dielectric resonator column 430. The cover unit 420 includes an upper cover 422 and a lower cover 424 and an elastic member disposed therebetween, and the lower cover 424 is relatively thin.

The difference from the above embodiment is that, in the present embodiment, the elastic member of the cover unit 420 is a projection 4222 formed on the lower surface of the upper cover 422.

Specifically, the upper cover 422 includes a body 4221 and a protrusion 4222, and the protrusion 4222 is in close contact with the lower cover 424. The protrusion 4222 is integrally formed with the body 4221, and the protrusion 4222 is discretely disposed around the upper cover. The lower surface of the plate 422 can be formed by stamping. When the cover unit 420 is closed to the cavity 410 by the fixing screw 412 and abuts against the dielectric resonator 430, the upper cover 422 presses the lower cover 424 through the protrusion 4222 to make the upper and lower covers. Both of them generate a certain elastic deformation (or only the lower cover plate is elastically deformed) so that the lower cover 424 is in close contact with the dielectric resonator column 430. It should be noted that there are a plurality of protrusions 4222 shown in the figure. It is easy to understand that the protrusions 4222 may also be integrally formed on the lower surface of the upper cover 422 by an integral protrusion structure or an annular protrusion structure. . The shape, size, and number of the specific protruding portions do not constitute a limitation of the present invention.

The upper cover in this embodiment is integrally formed with the elastic member, and the integrally formed upper cover and elastic member may be collectively referred to as an elastic member.

In addition, it should be noted that the protrusion 4222 in this embodiment may be disposed to have elasticity, or may be disposed without elasticity, as long as it can abut against the lower cover 424, so that the lower cover 424 is close to the dielectric resonator 430. Just touch it. When the projection 4222 is not elastic, it functions as a spacer to space the upper and lower covers. In the example in which the protrusion 4222 does not have elasticity, the lower cover may be provided to have elasticity, and pressure is applied to the lower cover through the spacer (ie, the protrusion 4222) to elastically deform the lower cover to be close to one end of the dielectric resonator column. contact. Further, the spacers mentioned herein may not be integrally formed with the upper cover plate, but as separate components, functioning as a spacer and applying pressure to the lower cover.

Of course, in this embodiment and in the embodiment shown in FIG. 3, the height of the dielectric resonator column can be set to be slightly larger than the height of the resonant cavity, thereby maintaining the full contact of the lower cover plate with the top surface of the dielectric resonator column.

Embodiment 2 is a cover unit. As shown in FIG. 5, a partial structural view of a cover unit of the dielectric resonator shown in FIG. 4 is shown. Specifically, FIG. 5 shows a cover according to an embodiment of the present invention. A schematic structural view of the lower bottom surface of the upper cover of the unit 420. Referring to FIG. 4 together, the cover unit 420 according to the embodiment of the present invention includes an upper cover 422 and a lower cover 424, and the lower cover 424 is relatively thin. The upper cover 422 includes a body 4221 and a protrusion 4222. The protrusion 4222 is in close contact with the lower cover 424. The protrusion 4222 is integrally formed with the body 4221. The protrusion 4222 is discretely disposed under the upper cover 422. The surface can be formed by stamping. It is easy to understand that the protrusion 4222 may also be integrally provided on the lower surface of the upper cover 422 as an integral projection structure or an annular projection structure. The shape, size, and number of the specific protruding portions do not constitute a limitation of the present invention.

Embodiment 3, please refer to FIG. 6 and FIG. 7 together. FIG. 6 shows a schematic cross-sectional view of a dielectric filter according to a preferred embodiment of the present invention, and FIG. 7 shows a cover unit of the dielectric filter shown in FIG. schematic diagram.

As is readily apparent from Fig. 6, the dielectric filter 500 includes a plurality of dielectric resonators as described above, and the dielectric filter operates by coupling a plurality of resonant cavities to each other. The plurality of upper cover plates and the plurality of lower cover plates of the plurality of dielectric resonators can be integrally formed, respectively, forming an integral upper cover plate and an integral lower cover plate, and the cavity is a multi-cavity structure, the whole lower cover plate and the cavity Each of the dielectric resonator columns is in elastic close contact.

Figure 8 shows a schematic cross-sectional view of a dielectric filter 600 in accordance with another preferred embodiment of the present invention. This embodiment is basically the same as the embodiment shown in FIG. The difference is that the dielectric member 600 of the dielectric filter 600 of the present embodiment is disposed between the integral upper cover 622 and the integral lower cover 624 as a substantially cylindrical coil spring or a spiral spring. A convex portion 626 is disposed at a lower portion of the upper cover plate 622, and a top end (not labeled) of the coil spring or the scroll spring 650 is attached or connected to the convex portion 626, a bottom end of the coil spring or the spiral spring 650 (not identified Abutting against the upper surface of the integral lower cover 624, the integral lower cover 624 is in elastic close contact with the respective dielectric resonators in the cavity.

Embodiment 4 is a dielectric filter.

9 and FIG. 10, FIG. 9 shows a schematic cross-sectional view of a dielectric filter 700 according to another preferred embodiment of the present invention, and FIG. 10 shows a partial cross-section of the cover 724 of the dielectric filter 700 of FIG. schematic diagram. The dielectric filter 700 of the present embodiment includes a cavity 710, a cover 724, a dielectric resonator 730, and a pressing member 722. Wherein the cover plate 724 covers the cavity 710 to form a resonant cavity (not identified), The dielectric resonator column 730 is disposed in the cavity, and the pressing member 722 is disposed on the cover plate 724 to apply pressure to the cover plate 724 to bring the cover plate 724 into close contact with one end of the dielectric resonator column 730. In this embodiment, the pressure of the cover plate 724 by the pressing member 722 achieves good contact between the upper surface of the dielectric resonator column 730 and the cover plate 724, thereby improving the filtering performance.

In the present embodiment, the dielectric filter 700 further includes an elastic member 750 disposed between the pressing member 722 and the cover 724. The pressing member 722 has a plurality of concave portions 7222 disposed in a discrete manner on the lower surface of the pressing member 722. The elastic members 750 are discretely disposed, and are disposed in the plurality of concave portions 7222 and protrude slightly from the corresponding concave portions 7222. . In the assembled condition, the cover plate 724 is elastically deformed by the cover plate 722 and the elastic ball 750, thereby closely contacting the upper end of the dielectric resonator column 730.

As shown in Fig. 10, the cover 724 is further provided with a plurality of connecting holes 7244, 7245 and the like for fixed connection with the cavity 710, and the cover 724 is further provided with a through hole 7246 for the tuning screw to pass therethrough. Further, a portion where the pressing member 722 applies pressure to the cap plate 724 is preferably a portion 7247 of the cap plate corresponding to the dielectric resonator column 730.

In the present embodiment, the cover 724 is provided with an engaging recess 7242 for accommodating the pressing member 722, and the engaging recess 7242 has a bottom portion 7241. The pressing member 722 is provided as a substantially cylindrical body having an external thread, and the engaging recess 7242 is provided to have an internal thread 7243 and an inner hollow portion thereof is a substantially cylindrical body. The pressing member 772 is screwed into the engaging recess 7242 by a screw connection. Of course, the compression member 772 can also be suitably disposed within the engagement recess 7242 by other suitable attachment means such as snap-fit engagement.

Embodiment 5 is a dielectric filter.

Figure 11a is a cross-sectional view showing a dielectric filter 800 according to another preferred embodiment of the present invention. The present embodiment is substantially the same as the fourth embodiment except that a plurality of recesses 7222 are provided in discrete form in the fourth embodiment. The annular groove 8222 is replaced with a plurality of elastic balls discretely disposed in the fourth embodiment, and the annular elastic washer 850 is disposed in the concave portion and protrudes slightly from the concave portion to apply pressure to the cover. Board 824. The elastic washer 850 in this embodiment is in the form of a seal ring. Figure lib shows a variation of the embodiment shown in Figure 11a in which the resilient washer 850' is in the form of an elastomeric pad. For the sake of brevity, the similarities between this embodiment and other embodiments are not repeated here. Embodiment 6 is a dielectric filter.

Fig. 12 is a cross-sectional view showing a dielectric filter 900 according to another preferred embodiment of the present invention. This embodiment is basically the same as the fourth embodiment except that the bottom of the pressing member 922 is integrally formed. The protrusions 950, the plurality of protrusions 950 are joined to the bottom of the recesses (not labeled) to apply pressure to the cover 924. For the sake of brevity, the similarities between this embodiment and other embodiments are not repeated here. It should be noted that, in this embodiment, the plurality of protrusions 950 may also be formed separately and attached to the bottom of the pressing member 922.

Embodiment 7 is a dielectric filter.

FIG. 13 is a cross-sectional view showing a dielectric filter 1000 according to another preferred embodiment of the present invention. This embodiment is substantially the same as the fourth embodiment except that the elastic member between the pressing member 1022 and the cover 1024 is Scroll spring 1050. For the sake of brevity, the similarities between this embodiment and other embodiments are not repeated here. It should be noted that, in this embodiment, the scroll spring 1050 may be replaced with other elastic members such as an elastic piece or a coil spring which are well known to those skilled in the art.

Embodiment 8 of the present invention further provides a communication device, where the communication device includes the above-mentioned dielectric filter, and the dielectric filter is applied to a signal transmitting and receiving circuit portion of a communication device, and the dielectric filter described above can be used to a large extent. Optimize performance metrics for communication devices and their dielectric filters.

It should be noted that the orientation words "upper end", "lower end", "upper", "lower" and the like mentioned in the embodiments of the present invention are all expressed according to a specific situation, and may be adjusted as needed or Changes, such as the terms "lower end" and "upper end" in this article can be replaced by "one end" and "other end" respectively. It is not intended to limit the invention. In addition, the upper cover and the lower cover mentioned in the embodiments herein may also be referred to as a second, first cover, respectively, as needed.

In summary, those skilled in the art will readily appreciate that the present invention includes at least the following advantages:

1. Install the elastic member between the two cover plates to avoid the use of the elastic member in the prior art. The high-low temperature can avoid the influence of the change of the size of the elastic member on the performance index.

2. Adding an elastic member on the cover unit that is in contact with the dielectric resonator column, and applying a pressure to the cover unit through the deformation of the elastic member, so that the cover unit can be in close contact with the dielectric resonator, and the cavity, The dimensional accuracy requirements of dielectric resonators are also reduced.

3. The elastic member can give the cover unit sufficient elasticity to ensure close contact between the cover unit and the dielectric resonator in the case where the cover unit is elastically deteriorated after being repeatedly disassembled.

In the above-described embodiments, the present invention has been exemplarily described, and various modifications of the present invention can be made without departing from the spirit and scope of the invention.

Claims

Rights request

A dielectric resonator comprising:

Cavity

a cover unit, the cover unit covers the cavity to form a resonant cavity;

a dielectric resonator column, the dielectric resonator column is disposed in the cavity, and one end of the dielectric resonator column is in contact with the cavity;

The cover unit includes an upper cover, a lower cover disposed under the upper cover, and an elastic member disposed between the upper cover and the lower cover, through the elastic member The deformation applies pressure to the lower cover plate such that the lower cover plate is in close contact with the other end of the dielectric resonator column.

2. The dielectric resonator according to claim 1, wherein a height of the dielectric resonator column is greater than a depth of the resonant cavity, such that the lower cover plate is elastically pressed tightly with the dielectric resonator column.

The dielectric resonator according to claim 1, wherein a recessed region is formed on a lower surface of the upper cover, and the elastic member is disposed in the recessed portion and partially protrudes from the recessed region. The pressure exerted by the elastic member causes the lower cover to be slightly deformed to be in full contact with the top surface of the dielectric resonator.

The dielectric resonator according to any one of claims 1 to 3, wherein the elastic member is a protrusion formed on a lower surface of the upper cover, and is applied to the lower cover by the protrusion The downward pressure causes the lower cover to be in full contact with the top surface of the dielectric resonator column.

The dielectric resonator according to any one of claims 1 to 3, wherein the elastic member is an elastic piece, a coil spring or a spiral spring.

The dielectric resonator according to any one of claims 1 to 3, wherein the upper cover has an annular groove on a lower surface of the upper cover, or a plurality of discretely distributed annular a recessed portion, the elastic member is an integral annular elastic washer or a plurality of discrete elastic balls respectively corresponding to the annular groove or the plurality of discrete recesses of the upper cover and partially protruding to be applied Pressure to the lower cover.

A cover unit for use in a dielectric resonator, wherein the cover unit includes an upper cover, a lower cover disposed under the upper cover, and the upper cover and the lower cover An elastic member between the cover plates.

The cover unit according to claim 7, wherein a concave portion is formed on a lower surface of the upper cover, and the elastic member is disposed in the recessed portion and partially protrudes from the recessed region, such that The lower cover can be deformed elastically relative to the upper cover.

The cover unit according to claim 7 or 8, wherein the elastic member is a protrusion formed on a lower surface of the upper cover.

A dielectric filter comprising a plurality of dielectric resonators according to any one of claims 1-6.

The dielectric filter according to claim 10, wherein a plurality of the upper cover plates and a plurality of the lower cover plates of the plurality of dielectric resonators are integrally formed, respectively, forming an integral upper cover plate and an entire body The lower cover plate is in elastic close contact with each of the dielectric resonator columns in the cavity.

12. A communication device, wherein the communication device comprises the dielectric filter according to claim 10 or 11, wherein the dielectric filter is provided in a signal transceiving circuit portion of the communication device for selecting a signal .

13. A dielectric filter comprising:

Cavity

An integral cover unit, the integral cover unit covers the cavity to form a plurality of resonant cavities; a plurality of dielectric resonant columns, the plurality of dielectric resonant columns are correspondingly disposed in the plurality of resonant cavities, One end of the dielectric resonator column is in contact with the cavity;

The integral cover unit includes an integral upper cover, an integral lower cover disposed under the integral upper cover, and an elastic member disposed between the integral upper cover and the integral lower cover Applying pressure to the integral lower cover by deformation of the elastic member, the integral lower cover is in close contact with the other end of the dielectric resonator.

14. A dielectric filter comprising: Cavity

a first cover, the first cover covers the cavity to form a resonant cavity;

The dielectric filter further includes a second cover disposed on the first cover and an elastic member disposed between the first cover and the second cover, through the elastic The deformation of the member applies pressure to the first cover plate such that the first cover plate is in close contact with the other end of the dielectric resonator column.

The dielectric filter according to claim 14, wherein the elastic member is an elastic piece, a coil spring, or a spiral spring.

The dielectric filter according to claim 14, wherein a convex portion is provided at a lower portion of the second cover, a top end of the elastic member abuts or connects the convex portion, and a bottom end of the elastic member abuts The upper surface of the first cover plate is such that the first cover plate is in elastic close contact with the dielectric resonator column in the cavity.

17. A dielectric filter comprising:

Cavity

a cover plate, the cover plate covers the cavity to form a resonant cavity;

a dielectric resonator column, the dielectric resonator column is disposed in the resonant cavity;

Wherein the dielectric filter further includes an elastic member disposed on the cover plate, and the cover plate is in close contact with one end of the dielectric resonator column by applying pressure to the cover plate by the elastic member .

The dielectric filter according to claim 17, wherein the elastic member is fixedly coupled to the cavity.

19. A dielectric filter comprising:

Cavity

a first cover plate, the first cover plate has elasticity, and the first cover plate covers the cavity to form a resonant cavity;

a dielectric resonator column, the dielectric resonator column is disposed in the resonant cavity; The dielectric filter further includes a second cover disposed on the first cover and a spacer disposed between the first cover and the second cover, through the interval Applying pressure to the first cover plate to elastically deform the first cover plate to be in close contact with one end of the dielectric resonator column.

The dielectric filter according to claim 19, wherein the spacer has elasticity.

The dielectric filter according to claim 19 or 20, wherein the spacer is integrally formed with the second cover, and the second cover presses the first cover by the spacer And causing the first cover plate and the second cover plate to have a certain elastic deformation or only elastically deforming the first cover plate, so that the first cover plate is in close contact with the dielectric resonator column.

The dielectric filter according to claim 21, wherein the spacer is a protrusion formed on a lower surface of the second cover.

The dielectric filter according to claim 19, wherein the spacer is an elastic piece, a coil spring or a spiral spring.

24. The dielectric filter according to claim 19, wherein a height of the dielectric resonator column is greater than a depth of the resonant cavity.

The dielectric filter according to claim 19, wherein a recessed area is formed on a lower surface of the second cover, and the spacer is disposed in the recessed area and partially protrudes from the recessed area, The pressure exerted by the spacer causes the first cover to be slightly deformed into full contact with the top surface of the dielectric resonator.

The dielectric filter according to claim 19, wherein the second cover has an annular groove on a lower surface of the second cover, or a plurality of discrete recesses distributed in a ring shape. The spacer is an integral annular elastic washer or a plurality of discrete elastic balls respectively disposed correspondingly in the annular groove or the plurality of discrete recesses of the second cover, and partially protruding to apply pressure to the The first cover is described.

27. A dielectric filter comprising:

Cavity

a cover plate, the cover plate covers the cavity to form a resonant cavity; a dielectric resonator column, the dielectric resonator column being disposed in the resonant cavity;

And a pressing member disposed on the cover plate to apply pressure to the cover plate to bring the cover plate into close contact with one end of the dielectric resonator column.

The dielectric filter according to claim 27, wherein the cover plate is provided with an engaging recess for accommodating the pressing member.

The dielectric filter according to claim 28, wherein a bottom portion of the pressing member is provided with a plurality of protrusions integrally formed or separately formed, and the plurality of protrusions abut against the joint IHJ portion The bottom is to apply pressure to the cover.

The dielectric filter according to claim 28, wherein the dielectric filter further comprises an elastic member disposed between the pressing member and the cover, the pressing member having the pressure An annular groove of the lower surface of the pressing member, or a plurality of discrete concave portions distributed in an annular shape, wherein the elastic member is an integral annular elastic washer or a plurality of discrete elastic balls, respectively corresponding to the pressing member An annular groove or a plurality of discrete recesses and partially protruded to apply pressure to the cover.

The dielectric filter according to claim 28, wherein the dielectric filter further includes an elastic member provided between the pressing member and the cover plate, and the elastic member is an elastic piece and a coil spring Or a scroll spring.