阅读说明：本技术 用于滤波器的耦合结构、滤波器及射频器件 (Coupling structure for filter, filter and radio frequency device ) 是由 尹泽 霍永兴 于 2020-12-30 设计创作，主要内容包括：本公开内容涉及一种用于滤波器的耦合结构,其特征在于,所述耦合结构包括：传输主线；第一谐振元件,所述第一谐振元件被构造用于产生谐振频率；第二谐振元件,所述第二谐振元件与所述第一谐振元件并排设置并且被构造用于与所述传输主线耦合,其中,所述传输主线被设置在所述第二谐振元件的端部；以及耦合片,所述耦合片被设置在所述传输主线和所述第二谐振元件之间,使得所述传输主线和所述第二谐振单元不直接接触。在本公开内容之中采用耦合片来调节传输主线和谐振元件之间的耦合,而且能够借助于该耦合片来稳定地支撑传输主线。依据本公开内容的耦合片的可调范围大,既能灵活调节耦合度,又便于安装调试。(The present disclosure relates to a coupling structure for a filter, characterized in that it comprises: a transmission main line; a first resonant element configured to produce a resonant frequency; a second resonance element disposed side by side with the first resonance element and configured to be coupled with the transmission main line, wherein the transmission main line is disposed at an end of the second resonance element; and a coupling tab disposed between the transmission main line and the second resonance element such that the transmission main line and the second resonance cell do not directly contact. The coupling piece is employed in the present disclosure to adjust the coupling between the transmission main line and the resonance element, and the transmission main line can be stably supported by means of the coupling piece. The coupling piece has a wide adjustable range, can flexibly adjust the coupling degree, and is convenient to install and debug.)

1. A coupling structure for a filter, the coupling structure comprising:

a transmission main line;

a first resonant element configured to produce a resonant frequency;

a second resonance element disposed side by side with the first resonance element and configured to be coupled with the transmission main line, wherein the transmission main line is disposed at an end of the second resonance element; and

a coupling tab disposed between the transmission main line and the second resonance element such that the transmission main line and the second resonance cell are not in direct contact.

2. The coupling structure of claim 1, further comprising a tuning unit that is not in contact with the first resonant element and is configured to cooperate with the first resonant element to adjust the resonant frequency.

3. The coupling structure according to claim 2, characterized in that the end of the first resonator element at which the tuning unit is provided is located on the same side as the end of the second resonator element at which the transmission main line is provided.

4. The coupling structure according to claim 1, wherein the coupling tab is made of an insulating material.

5. The coupling structure according to claim 1, characterized in that the shape and size of the coupling tab are associated with a degree of coupling between the transmission main line and the second resonance unit to be achieved.

6. The coupling structure according to claim 1, further comprising a fastener configured to fix the transmission main line to the second resonance unit.

7. The coupling structure according to claim 6, wherein the fastener is further configured to secure the coupling tab to the second resonating unit.

8. The coupling structure according to claim 6 or 7, wherein the fastener comprises an insulating screw.

9. The coupling structure according to claim 1, characterized in that the transmission main line is made of a metallic material.

10. The coupling structure according to claim 1, characterized in that the transmission main line is constructed as a strip line.

11. The coupling structure according to claim 1, characterized in that the transmission main line has a folded or bent structure.

12. The coupling structure according to claim 1, wherein the first resonant element and the second resonant element are integrally formed.

13. A filter, characterized in that it comprises at least two coupling structures according to any of claims 1 to 12.

14. The filter of claim 13, wherein the number of coupling structures is at least three.

15. The filter according to claim 14, wherein a length of the transmission main line between two adjacent coupling structures is associated with an electrical distance between the two adjacent resonant cavities.

16. The filter according to claim 15, characterized in that the transmission main line has a folded or bent structure.

17. The filter of any of claims 13 to 16, wherein the filter is a band-stop filter.

18. A radio frequency device characterized in that it comprises a filter according to any one of claims 13 to 17.

Technical Field

The present disclosure relates to the field of communications technologies, and more particularly, to a coupling structure for a filter, a filter including the coupling structure, and a radio frequency device including the filter.

Background

Patent publication No. CN106602191A discloses a high performance band-stop filter and a communication cavity device, and more specifically, it provides a band-stop filter with strong suppression, but in this patent document, a coupling disc is required to realize coupling, the processing cost is high, the assembly is complicated, and the consistency is poor. Therefore, the scheme does not meet the requirements of a band-stop filter with strong suppression and simple processing.

Disclosure of Invention

In view of the deep understanding of the problems existing in the background art, the technical problem to be solved by the inventors of the present disclosure is the disadvantage of the current band-stop filter. The technical scheme provided by the disclosure adopts a simple coupling structure of the resonant element and the transmission main line, so that the coupling degree can be flexibly adjusted, and the installation and debugging are convenient.

In particular, a first aspect of the present disclosure proposes a coupling structure for a filter, characterized in that it comprises:

a transmission main line;

a first resonant element configured to produce a resonant frequency;

a second resonance element disposed side by side with the first resonance element and configured to be coupled with the transmission main line, wherein the transmission main line is disposed at an end of the second resonance element; and

a coupling tab disposed between the transmission main line and the second resonance element such that the transmission main line and the second resonance cell are not in direct contact.

The coupling piece is employed in the present disclosure to adjust the coupling between the transmission main line and the resonance element, and the transmission main line can be stably supported by means of the coupling piece. The coupling piece has a wide adjustable range, can flexibly adjust the coupling degree, and is convenient to install and debug.

In one embodiment according to the present disclosure, the coupling structure further comprises a tuning unit, which is not in contact with the first resonator element and is configured to cooperate with the first resonator element to adjust the resonance frequency.

In one embodiment according to the present disclosure, an end of the first resonance element at which the tuning unit is provided is located on the same side as an end of the second resonance element at which the transmission main line is provided.

In one embodiment according to the present disclosure, the coupling tab is made of an insulating material.

In one embodiment according to the present disclosure, a shape and a size of the coupling tab are associated with a degree of coupling between the transmission main line and the second resonance unit to be achieved.

In one embodiment according to the present disclosure, the coupling structure further includes a fastener configured to fix the transmission main line to the second resonance unit.

In one embodiment according to the present disclosure, the fastener is further configured to fix the coupling tab to the second resonance unit.

In one embodiment according to the present disclosure, the fastener comprises an insulated screw.

In one embodiment according to the present disclosure, the transmission main line is made of a metal material.

In one embodiment according to the present disclosure, the transmission main line is configured as a strip line.

In one embodiment according to the present disclosure, the transmission main line has a folded or bent structure. The transmission main line with a folding or bending structure is adopted, so that the product size can be small, and the cost is saved.

In one embodiment according to the present disclosure, the first resonator element and the second resonator element are integrally formed.

Furthermore, a second aspect of the present disclosure also proposes a filter characterized in that it comprises at least two coupling structures proposed according to the first aspect of the present disclosure.

In one embodiment according to the present disclosure, the number of the coupling structures is at least three.

In one embodiment according to the present disclosure, a length of the transmission main line between two adjacent coupling structures is associated with an electrical distance between the two adjacent resonant cavities.

In one embodiment according to the present disclosure, the transmission main line has a folded or bent structure.

In one embodiment according to the present disclosure, it is characterized in that the filter is a band-stop filter.

Furthermore, a third aspect of the present disclosure also proposes a radio frequency device comprising the proposed filter according to the second aspect of the present disclosure.

In summary, the coupling structure, the filter including the coupling structure, and the radio frequency device including the filter according to the present disclosure all employ the coupling piece to adjust the coupling between the transmission main line and the resonant element, and can stably support the transmission main line by means of the coupling piece. The coupling piece has a wide adjustable range, can flexibly adjust the coupling degree, and is convenient to install and debug.

Drawings

Embodiments are shown and described with reference to the drawings. These drawings are provided to illustrate the basic principles and thus only show the aspects necessary for understanding the basic principles. The figures are not to scale. In the drawings, like reference numerals designate similar features.

Fig. 1 shows a cross-sectional view of a coupling structure 100 for a filter according to one embodiment of the present disclosure;

fig. 2 shows an exploded view of a coupling structure 100 for a filter according to one embodiment of the present disclosure;

fig. 3 shows a top view of a filter 200 including a coupling structure for the filter according to one embodiment of the present disclosure;

fig. 4 shows a front view of a filter 200 including a coupling structure for the filter according to one embodiment of the present disclosure;

fig. 5 illustrates a perspective view of a filter 200 including a coupling structure for the filter in accordance with one embodiment of the present disclosure; and

fig. 6 illustrates a perspective view of a filter 300 including a coupling structure for the filter in accordance with one embodiment of the present disclosure.

Other features, characteristics, advantages and benefits of the present disclosure will become more apparent from the following detailed description taken in conjunction with the accompanying drawings.

Detailed Description

In the following detailed description of the preferred embodiments, reference is made to the accompanying drawings, which form a part hereof. The accompanying drawings illustrate, by way of example, specific embodiments in which the disclosure can be practiced. The example embodiments are not intended to be exhaustive of all embodiments according to the disclosure. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present disclosure. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the present disclosure is defined by the appended claims.

In order to solve the technical problems of poor coupling effect, insufficient suppression and the like in the prior art, the transmission main line is designed above a part of the resonant element, namely the second resonant element, and a coupling sheet is arranged between the second resonant element and the transmission main line. The degree of coupling of the transmission main line and the second resonance element can be arbitrarily changed by changing the size (diameter, thickness, etc.) of the coupling piece. An insulating screw can optionally be arranged above the transmission main line, so as to fix the transmission main line, the coupling tab and the second resonator element together. Since the transmission main line is located above the second resonant element, the Q value (Q is a quality factor) of the resonant cavity is ensured, and the insertion loss of the filter is reduced.

In addition, preferably, in order to make the coupling structure, the filter and the radio frequency device small in size, the physical distance between every two resonant cavities must be minimized, but the electrical distance required by every two resonant cavities must be met, so that the transmission main line can be designed into a bent shape, for example, and the main line can be designed into different sizes according to different electrical distances. The resonator unit is made as two connected cylinders (i.e. a first resonator element and a second resonator element), while the first resonator element can be, for example, an open cylinder for adjusting the frequency of the filter; the second resonator element is for coupling to a transmission main line.

The coupling structure proposed according to the present disclosure and the filter including the same are described below with reference to the accompanying drawings.

Fig. 1 illustrates a cross-sectional view of a coupling structure 100 for a filter according to one embodiment of the present disclosure. Fig. 2 shows an exploded view of a coupling structure 100 for a filter according to one embodiment of the present disclosure.

As can be seen from fig. 1 and 2, the coupling structure 100 for a filter of the present disclosure includes a transmission main line 110. Furthermore, the coupling structure 100 comprises a first resonator element 132 and a second resonator element 134, wherein the first resonator element 132 is configured to generate a resonance frequency; and a second resonance element 134 is arranged side by side with the first resonance element 132 and is configured to be coupled with the transmission main line 110, wherein the transmission main line 110 is arranged at an end of the second resonance element 134, and the transmission main line 110 is arranged above the second resonance element 134 in the direction shown in fig. 1 and 2. Further, the coupling structure 100 further includes a coupling tab 120, and the coupling tab 120 is disposed between the transmission main line 110 and the second resonance element 134 so that the transmission main line 110 and the second resonance element 134 are not in direct contact. The coupling piece 120 is employed in the present disclosure to adjust the coupling between the transmission main line 110 and the resonance element, particularly, the second resonance element 134, and the transmission main line 110 can be stably supported by means of the coupling piece 120. The adjustable range of the coupling piece 120 according to the present disclosure is large, which not only can flexibly adjust the coupling degree, but also is convenient for installation and debugging. Optionally, fig. 1 and 2 also show a tuning screw 140, which tuning screw 140 can be mounted, for example, on a housing cover plate (not shown in the figures), so that the depth to which the tuning screw 140 protrudes into the first resonator element 132 can be adjusted to adjust the resonant frequency of the first resonator element 132. In summary, optionally, in an embodiment according to the present disclosure, the coupling structure 100 further comprises a tuning unit 140, the tuning unit 140 being out of contact with the first resonance element 132 and configured to cooperate with the first resonance element 132 to adjust the resonance frequency. Preferably, as shown in fig. 1 and 2, in one embodiment according to the present disclosure, an end of the first resonance element 132 at which the tuning unit 140 is provided is located on the same side as an end of the second resonance element 134 at which the transmission main line 110 is provided.

Optionally, in one embodiment according to the present disclosure, the coupling tab 120 is made of an insulating material. Such as PTFE and/or ULTEM materials, and the like. It will be understood by those skilled in the art that the insulating material here does not require that the coupling tab 120 is made entirely of an insulating material, and it is also possible to make the main body of a metal material, for example, and then coat the outer surface with an insulating material, that is, as long as the insulation between the transmission main line 110 and the second resonance element 134 can be achieved. Preferably, in one embodiment according to the present disclosure, the shape and size of the coupling tab 120 are associated with a degree of coupling between the transmission main line 110 and the second resonance unit 134 to be achieved. Optionally or alternatively, in an embodiment according to the present disclosure, the coupling structure 100 further includes a fastener 150, and the fastener 150 is configured to fix the transmission main line 110 to the second resonance unit 134.

Furthermore, preferably, in an embodiment according to the present disclosure, the fastener 150 is further configured to fix the coupling tab 120 to the second resonance unit 134. In one embodiment according to the present disclosure, the fastener 150 comprises an insulated screw made of an insulating material, such as PTFE and/or ULTEM materials, and the like. It will be understood by those skilled in the art that the insulating material here does not require that the insulating screw is made entirely of an insulating material, and for example, it is also possible to make the main body of a metal material and then coat the outer surface with an insulating material, that is, as long as the insulation between the transmission main line 110 and the second resonance element 134 can be achieved. The insulating screw in this embodiment fixes the transmission main line 110 and the coupling tab 120 to the top end of the second resonance unit 134 such that the coupling tab 120 is located between the second resonance unit 134 and the insulating screw. Other securing structures may be employed as fasteners as embodiments of the present invention.

Alternatively, in one embodiment according to the present disclosure, the transmission main line 110 is made of a metal material, such as a copper and/or aluminum material or the like. It should be understood by those skilled in the art that the metal material does not require that the transmission main line 110 is made of a metal material, and for example, the main body can be made of other materials, and then the metal material is coated on the outer surface, that is, as long as the conductive performance of the transmission main line 110 can be achieved. In one embodiment according to the present disclosure, the transmission main line 110 is configured as a strip line. In one embodiment according to the present disclosure, the transmission main line 110 has a folded or bent structure. The transmission main line with a folding or bending structure is adopted, so that the product size can be small, and the cost is saved. In one embodiment according to the present disclosure, the first resonant element 132 and the second resonant element 134 are integrally formed.

The structures of the filter 200 and the filter 300 including the above-described coupling structure are described below with reference to fig. 3 to 6.

Fig. 3 illustrates a top view of a filter 200 including a coupling structure for a filter according to one embodiment of the present disclosure, fig. 4 illustrates a front view of the filter 200 including a coupling structure for a filter according to one embodiment of the present disclosure, and fig. 5 illustrates a perspective view of the filter 200 including a coupling structure for a filter according to one embodiment of the present disclosure.

As can be seen from the filter 200 of fig. 3 to 5, the filter 200 includes five coupling structures 222, 223, 224, 225 and 226, and the coupling structures 222, 223, 224, 225 and 226 share the transmission main line 210. In summary, the second aspect of the present disclosure also proposes a filter 200 comprising at least two coupling structures as proposed according to the first aspect of the present disclosure. It should be clear to the person skilled in the art that the five are merely exemplary and not restrictive, but that a filter 200 can also comprise, for example, only two coupling structures, but also more than five coupling structures 222, 223, 224, 225 and 226, if the design can be specifically tailored to the specific requirements. Preferably, in one embodiment according to the present disclosure, the number of the coupling structures is at least three. For example, in the examples shown in fig. 3 to 6, there are five coupling structures 222, 223, 224, 225 and 226 or five coupling structures 322, 323, 324, 325 and 326. Preferably, in an embodiment according to the present disclosure, a length of the transmission main line 210 between two adjacent coupling structures (two adjacent ones of the five coupling structures 322, 323, 324, 325, and 326) is associated with an electrical distance between the two adjacent resonant cavities. Preferably, in one embodiment according to the present disclosure, the transmission main line 210 has a folded or bent structure. As can be seen from fig. 5, for example, the transmission main line 210 has a shape bent downward. In one embodiment according to the present disclosure, the filter 200 is a band-stop filter.

Further preferably, as shown in fig. 6, fig. 6 shows a perspective view of a filter 300 comprising a coupling structure for the filter according to an embodiment of the present disclosure. The difference between fig. 6 and 5 is that, in order to further accommodate the limitation of the installation space of the filter 300, the transmission main line 310 of the filter 300 can be further bent, thereby changing the arrangement direction of the coupling structures 322, 323, 324, 325, and 326, and further optimizing the space requirement of the filter 300.

As can be seen from the filter 300 of fig. 6, the filter 300 includes five coupling structures 322, 323, 324, 325 and 326, and the coupling structures 322, 323, 324, 325 and 326 share the transmission main line 310. In summary, the second aspect of the present disclosure also proposes that the filter 300 comprises at least two coupling structures as proposed according to the first aspect of the present disclosure. It should be clear to the person skilled in the art that the five are merely exemplary and not restrictive, but that a filter 300 can also comprise, for example, only two coupling structures, but also more than five coupling structures 322, 323, 324, 325 and 326, as long as the design can be specifically tailored to the specific requirements. Preferably, in one embodiment according to the present disclosure, the number of the coupling structures is at least three. For example, in the example shown in fig. 6 are five coupling structures 322, 323, 324, 325, and 326. Preferably, in an embodiment according to the present disclosure, a length of the transmission main line 310 between two adjacent coupling structures (two adjacent ones of the five coupling structures 322, 323, 324, 325, and 326) is associated with an electrical distance between the two adjacent resonant cavities. Preferably, in one embodiment according to the present disclosure, the transmission main line 310 has a folded or bent structure. As can be seen from fig. 6, for example, the transmission main line 310 has a shape bent downward. In one embodiment according to the present disclosure, the filter 300 is a band-stop filter.

Furthermore, a third aspect of the present disclosure also proposes a radio frequency device comprising the proposed filter according to the second aspect of the present disclosure.

In summary, the coupling structure, the filter including the coupling structure, and the radio frequency device including the filter according to the present disclosure all employ the coupling piece to adjust the coupling between the transmission main line and the resonant element, and can stably support the transmission main line by means of the coupling piece. The coupling piece has a wide adjustable range, can flexibly adjust the coupling degree, and is convenient to install and debug.

Further preferably, with the design of the coupling tab 120, the coupling amount of the second resonance element 134 and the transmission main line 110 can be arbitrarily changed, thereby realizing a stop band filter of an arbitrary bandwidth. And the coupling piece 120 can be processed into a cylinder shape, so that the processing is easy and the cost is low. Further, by designing the transmission main line 110 above the second resonant element 134, the Q value of the resonant cavity is not lost, so that good insertion loss performance is achieved, and assembly and debugging are simpler. Preferably, the transmission main line 110 is designed to be bent, so that the overall size of the product can be reduced, and the cost can be reduced. Finally, it is more preferable that the transmission main line 110 is designed as a strip line and is integrally formed by a stamping process, so as to reduce the cost, wherein the transmission main line 110 may have any shape and size, and the transmission main line 110 may be a strip line or a coaxial line, and may be located at any position above the second resonant element. The resonant cavity can be square, round and any shape. The first resonant element and the second resonant element in the embodiment of the present invention have a cylindrical shape, but it should be understood that other shapes, such as a rectangular parallelepiped shape, a sheet shape, etc., may be adopted, and different shapes may be designed according to actual applications, and are all suitable for the present invention. The band elimination filter has wide application range, and the radio frequency device adopting the structure of the band elimination filter can be widely applied to modern mobile communication and can be used as a combiner, a duplexer, a filter and other devices. The resonant cavity and the resonant column are made of metal materials, and can be made of materials such as ceramics or quartz and the like to replace metal.

While various exemplary embodiments of the disclosure have been described, it will be apparent to those skilled in the art that various changes and modifications can be made which will achieve one or more of the advantages of the disclosure without departing from the spirit and scope of the disclosure. Other components performing the same function may be substituted as appropriate by those skilled in the art. It should be understood that features explained herein with reference to a particular figure may be combined with features of other figures, even in those cases where this is not explicitly mentioned. Further, the methods of the present disclosure may be implemented in either all software implementations using appropriate processor instructions or hybrid implementations using a combination of hardware logic and software logic to achieve the same result. Such modifications to the solution according to the disclosure are intended to be covered by the appended claims.