CN117080708B

CN117080708B - Resonator, filter and communication device

Info

Publication number: CN117080708B
Application number: CN202311322577.XA
Authority: CN
Inventors: 谢懿非; 孟弼慧; 丁海; 党志南; 陈嘉元
Original assignee: Comba Telecom Technology Guangzhou Ltd; Comba Telecom Systems Guangzhou Co Ltd; Jingxin RF Technology Guangzhou Co ltd
Current assignee: Comba Telecom Technology Guangzhou Ltd; Comba Telecom Systems Guangzhou Co Ltd; Jingxin RF Technology Guangzhou Co ltd
Priority date: 2023-10-13
Filing date: 2023-10-13
Publication date: 2024-03-26
Anticipated expiration: 2043-10-13
Also published as: CN117080708A

Abstract

The present application relates to a resonator, a filter and a communication device, the resonator comprising: planar coupling, support and coupling arm. The planar coupling has a coupling plane. The support member includes a main support section extending in a direction perpendicular to the coupling plane and an auxiliary support section connected between the main support section and the planar coupling member. The auxiliary support section is connected with the edge of the planar coupling member, and the auxiliary support section is arranged in a curved shape concavely arranged towards the central axis far away from the coupling plane. One end of the coupling arm is connected with the auxiliary supporting section or the plane coupling piece, the other end of the coupling arm is set to be a free end and is used for coupling connection with another resonator, and the extending direction of the coupling arm is parallel to the coupling plane. Therefore, a stronger capacitive coupling effect between the two resonators can be achieved, the lower the resonant frequency is, compared with the structural form of the capacitive flying rod which is adopted and provided with the probe in the related art, the structure is simpler, the materials are saved, the installation step can be omitted, the cost is reduced, and meanwhile, the far-end inhibition can be improved.

Description

Resonator, filter and communication device

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a resonator, a filter, and a communications device.

Background

The filter is a frequency selective device and is an integral part of the communication equipment. The filter suppression is improved, the insertion loss is reduced, and meanwhile, the product cost is considered, so that the filter design is a problem which must be considered. The filter in the related art introduces capacitive coupling to make the filter generate transmission zero point in passband, and in practical application, the capacitive coupling is usually introduced by introducing a probe type capacitive flying bar. The structure of the capacitive flying rod is seen from the structure, the structure is complex, the material consumption is high, strict requirements are put on the installation of the filter, the installation steps are complex, and the production and the processing are inconvenient; the capacitive flying bar of the probe type has smaller capacitive coupling bandwidth from the electrical performance, and the length of the capacitive flying bar needs to be lengthened to increase the coupling bandwidth, but the length is increased and simultaneously harmonic wave is generated, so that the far-end suppression of the filter is adversely affected.

Disclosure of Invention

Based on this, there is a need to overcome the drawbacks of the prior art by providing a resonator, a filter and a communication device that can reduce material, reduce installation steps, reduce costs, increase capacitive coupling bandwidth and improve product far-end rejection.

A resonator, the resonator comprising:

a planar coupling having a coupling plane;

the support piece comprises a main support section and an auxiliary support section, the main support section extends along the direction perpendicular to the coupling plane, the auxiliary support section is connected between the main support section and the plane coupling piece, the auxiliary support section is connected with the edge of the plane coupling piece, and the auxiliary support section is arranged in a bent shape concavely arranged towards the central axis far away from the coupling plane; and

And one end of the coupling arm is connected with the auxiliary supporting section or the plane coupling piece, the other end of the coupling arm is set to be a free end and is used for being coupled and connected with the other resonator, and the extending direction of the coupling arm is parallel to the coupling plane.

In one embodiment, the coupling arm includes any one or a combination of a straight arm, an arc arm, and a fold line arm.

In one embodiment, the coupling arms, the planar coupling member and the support member are of unitary metal sheet construction.

In one embodiment, the coupling arm, the planar coupling member and the support member are integrally formed by stamping, die casting, bending, and forging.

In one embodiment, the secondary support section includes a first support section connected to the primary support section and disposed at an obtuse angle.

In one embodiment, the auxiliary support section further comprises a second support section, the first support section is connected with the planar coupling member by the second support section, and the second support section extends in a direction perpendicular to the coupling plane.

In one embodiment, the auxiliary supporting section further comprises a third supporting section extending obliquely relative to the coupling plane, the first supporting section is connected with the plane coupling member through the third supporting section, the first supporting section and the third supporting section are arranged at an obtuse angle, and the third supporting section and the main supporting section are arranged at an obtuse angle.

In one embodiment, the auxiliary support section comprises an arc-shaped connecting section, the bottom end of the arc-shaped connecting section is connected with the main support section, and the top end of the arc-shaped connecting section is connected with the plane coupling piece.

In one embodiment, the auxiliary supporting section further comprises a transition section, and the bottom end of the arc-shaped connecting section is connected with the main supporting section through the transition section.

The utility model provides a wave filter, the wave filter includes the casing and locates at least two resonators of casing inside, the casing is equipped with at least two resonant cavities, each the resonator corresponds to set up in each the resonant cavity, at least one the resonator sets up as the resonator, support piece keep away from the one end of plane coupling spare with the inner wall connection of resonant cavity, the free end of coupling arm links to each other with another the resonator coupling.

In one embodiment, the connection of the end of the support remote from the planar coupling to the inner wall of the respective individual resonant cavity is centered on the inner wall.

In one embodiment, the shell comprises a peripheral frame with two open ends, a top plate and a bottom plate, wherein the top plate and the bottom plate are respectively connected with two opposite ends of the peripheral frame, and each resonator is connected with the bottom plate; one end of the supporting piece, which is far away from the plane coupling piece, is connected with the bottom plate, and the plane coupling piece and the top plate are arranged at opposite intervals.

In one embodiment, the top plate is provided with at least one first adjusting hole communicated with the resonant cavity, and the planar coupling piece is provided with a second adjusting hole correspondingly communicated with the first adjusting hole; the filter further comprises a first debugging piece, the first debugging piece stretches into the resonant cavity through the first adjusting hole, and the first debugging piece can reciprocate along the axial direction of the second adjusting hole so as to adjust the frequency.

In one embodiment, the central axis of the main support section is collinear with the central axis of the second adjustment aperture.

In one embodiment, the top plate is further provided with at least one third adjusting hole communicated with the resonant cavities, a coupling window is arranged between two adjacent resonant cavities on the signal transmission path, the third adjusting holes are correspondingly arranged at the positions of the coupling windows, the filter further comprises a second debugging piece, the second debugging piece stretches into the resonant cavities through the third adjusting holes, and the second debugging piece can reciprocate along the axial direction of the third adjusting holes to adjust the coupling quantity.

In one embodiment, at least one of the top plate and the bottom plate is detachably connected or welded to the peripheral frame.

In one embodiment, each of the resonators is integrally formed.

In one embodiment, two adjacent resonators are connected through a coupling piece and are manufactured in an integral molding mode.

A communication device comprising said filter.

According to the resonator, the filter and the communication equipment, as the coupling arm is connected to the auxiliary supporting section or the plane coupling piece in the bent shape, the other end of the coupling arm is set to be the free end and is used for being coupled and connected with the other resonator, the extending direction of the coupling arm is parallel to the coupling plane, a stronger capacitive coupling effect between the two resonators can be achieved, the lower the resonant frequency is, namely the influence on the resonant frequency of the two resonators is increased, the capacitive coupling bandwidth and the resonant frequency are respectively obviously larger than those of the probe type capacitive flying rod in the related art, compared with the structural form of the probe type capacitive flying rod adopted and installed in the related art, the structure is simpler, materials are saved, the installation step can be omitted, the cost is reduced, and meanwhile, the far-end inhibition can be improved.

Drawings

Fig. 1 is a schematic structural diagram of a resonator according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a resonator according to another embodiment of the present application.

Fig. 3 is a schematic structural diagram of a resonator according to another embodiment of the present application.

Fig. 4 is a schematic structural diagram of a resonator according to still another embodiment of the present application.

Fig. 5 is a schematic structural diagram of a filter according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a filter according to another embodiment of the present application.

Fig. 7 is a schematic structural diagram of a filter according to another embodiment of the present application.

Fig. 8 is a schematic structural diagram of a filter according to another embodiment of the present application.

Fig. 9 is a schematic structural diagram of a filter according to another embodiment of the present application.

Fig. 10 is a schematic structural diagram of a filter according to another embodiment of the present application.

Fig. 11 is a schematic diagram showing the far-end suppression of a filter with a probe-type capacitive flying bar according to an embodiment of the related art.

Fig. 12 is a simulation diagram of the far-end rejection of a filter according to an embodiment of the present application.

10. A resonator; 11. a planar coupling; 111. a second adjustment aperture; 12. a support; 121. a main support section; 122. an auxiliary support section; 1221. a first support section; 1222. a second support section; 1223. an arc-shaped connecting section; 1224. a transition section; 13. a coupling arm; 20. a housing; 21. a resonant cavity; 22. a coupling window; 23. a wallboard; 30. a first test piece; 40. a second test piece; 50. and a coupling sheet.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is, however, susceptible of embodiment in many other forms than those described herein and similar modifications can be made by those skilled in the art without departing from the spirit of the application, and therefore the application is not to be limited to the specific embodiments disclosed below.

As described in the background art, the probe type capacitive fly rod used for the filter in the related art has the following problems: on one hand, the structure is complex, the material consumption is high, strict requirements are put on the installation of the filter, the installation steps are complex, and the production and the processing are inconvenient; on the other hand, the capacitive coupling bandwidth is relatively small, and the length thereof needs to be increased to increase the coupling bandwidth, however, the length is increased and simultaneously harmonic waves are generated, so that the far-end suppression of the filter is adversely affected.

For the above reasons, the present application provides a resonator, a filter and a communication device, which can reduce materials, reduce installation steps, reduce cost, and increase capacitive coupling bandwidth and improve the scheme of product far-end suppression.

Referring to any one of fig. 1 to 4, and to any one of fig. 5 to 10, fig. 1 to 4 respectively show structural diagrams of resonators 10 of four different embodiments of the present application, and any one of fig. 5 to 10 shows structural diagrams of filters of six different embodiments of the present application. An embodiment of the present application provides a resonator 10, the resonator 10 includes: planar coupling 11, support 12 and coupling arm 13.

Wherein the planar coupling 11 has a coupling plane. The profile shape of the planar coupling member 11 may be rectangular, circular, etc., the planar coupling member 11 may be sheet-shaped or block-shaped, and the coupling planes may be disposed parallel to the horizontal plane.

Further, the support 12 comprises a main support section 121 extending in a direction perpendicular to the coupling plane and a secondary support section 122 connected between the main support section 121 and the planar coupling 11. The auxiliary support section 122 is connected to the edge of the planar coupling 11, the auxiliary support section 122 being provided in a curved shape recessed toward the central axis away from the coupling plane. In particular, the support 12 may be in the form of a strip or sheet.

In addition, one end of the coupling arm 13 is connected to the auxiliary support section 122 or the planar coupling element 11, and the other end of the coupling arm 13 is provided as a free end and is adapted to be coupled to another resonator 10, the direction of extension of the coupling arm 13 being parallel to the coupling plane.

In the resonator 10, since the coupling arm 13 is connected to the curved auxiliary supporting section 122 or the planar coupling member 11, the other end of the coupling arm 13 is set as a free end and is used for coupling with another resonator 10, the extending direction of the coupling arm 13 is parallel to the coupling plane, so that a stronger capacitive coupling effect between the two resonators 10 can be achieved, the lower the resonant frequency is, that is, the influence on the resonant frequency of the resonator is increased, the capacitive coupling bandwidth and the resonant frequency are respectively obviously greater than those of the probe type capacitive flying rod in the related art, compared with the structural form of adopting and installing the probe type capacitive flying rod in the related art, the structure is simpler, the materials are saved, the installation step can be omitted, the cost is reduced, and meanwhile, the far-end suppression can be improved.

Referring to any one of fig. 1 to 4, in some embodiments, the supporting member 12 and the planar coupling member 11 are integrally formed as a metal sheet structure, which is simple and convenient to manufacture and low in manufacturing cost, and the main supporting section 121 and the first supporting section 1221 can be arranged at an obtuse angle by stamping.

Referring to fig. 1 to 4, in some embodiments, on the premise that the coupling arms 13 with the same external dimensions are used, specifically, for the coupling arms 13 with the same length dimensions, the closer the coupling position of the coupling arms 13 and the auxiliary supporting section 122 is to the coupling plane, the larger the capacitive coupling bandwidth generated between the adjacent two resonators 10 will have a larger influence on the resonance frequency thereof; conversely, the further the coupling arm 13 is connected to the auxiliary support section 122 from the coupling plane, the smaller the capacitive coupling bandwidth generated between two adjacent resonators 10 will have a smaller influence on the resonance frequency itself.

Referring to fig. 1 to 4, specifically, the capacitive coupling bandwidth generated when the coupling arm 13 is connected to the coupling plane (the connection position shown in fig. 2 or fig. 4) is greater than the capacitive coupling bandwidth generated when the coupling arm 13 is connected to the auxiliary supporting section 122 (the connection position shown in fig. 1 or fig. 3), and the influence of the coupling arm 13 on the resonance frequency of the coupling arm 13 when connected to the coupling plane is greater than the influence of the coupling arm 13 on the resonance frequency of the coupling arm 122 when connected to the auxiliary supporting section. In addition, the coupling arm 13 has a larger capacitive coupling bandwidth when connected to the auxiliary support section 122 than when connected to the main support section 121 (not shown) and the coupling arm 13 has a larger influence on its resonance frequency when connected to the auxiliary support section 122 than when connected to the main support section 121.

Referring to fig. 1 or fig. 3, in some embodiments, when one end of the coupling arm 13 is connected to the auxiliary supporting section 122, the connection position between the end of the coupling arm 13 and the auxiliary supporting section 122 can be flexibly adjusted and selected according to the actual requirement, which is not limited herein. In addition, referring to fig. 2 or fig. 4, when one end of the coupling arm 13 is connected to the coupling plane, the connection position between the end of the coupling arm 13 and the coupling plane can be adjusted and selected according to the actual requirement, and any position on the circumferential edge of the coupling plane is not limited herein.

It should be noted that the vertical directions in this embodiment are not strictly vertical directions in a mathematical sense, but may be mutually perpendicular to each other in visual sense, so that a process error and an assembly error within, for example, 5 ° are allowed. Likewise, the parallelism in this embodiment is not strictly parallel in a mathematical sense, but rather is seen to be parallel to each other by the naked eye, allowing for process errors and assembly errors within, for example, 5 °.

Referring to fig. 1 to 10, in some embodiments, the coupling arm 13 may be flexibly adjusted and set according to practical needs, including but not limited to any one or combination of a straight arm, an arc arm and a fold line arm, which may be set to be either a regular shape or an irregular shape, and is not limited herein, so long as the coupling arm is parallel to a coupling plane, a stronger capacitive coupling amount between the two resonators 10 can be achieved, and a larger influence on the resonant frequency of the resonators 10 is generated.

Referring to fig. 1, in one embodiment, the coupling arm 13, the planar coupling member 11 and the supporting member 12 are formed as a unitary metal sheet structure. Specifically, the coupling arm 13, the planar coupling member 11, and the support member 12 are integrally formed by punching, die casting, bending, and forging. Thus, the coupling arm 13, the planar coupling member 11 and the supporting member 12 are integrally formed, so that mass production can be realized, and the production efficiency can be improved.

In one embodiment, the secondary support section 122 includes a first support section 1221. The main support section 121 extends in a direction perpendicular to the coupling plane, for example, the main support section 121 may extend in a vertical direction. The first support section 1221 extends obliquely to the coupling plane, i.e. the first support section 1221 may be arranged obliquely to the horizontal. Meanwhile, the main support section 121 is connected with the planar coupling member 11 through the first support section 1221, i.e., one end of the first support section 1221 is connected with one end of the main support section 121, the other end of the first support section 1221 is connected with the planar coupling member 11, and the other end of the main support section 121 is connected with the inner wall of the resonant cavity 21. And, the first support section 1221 is disposed at an obtuse angle with respect to the main support section 121, that is, an angle between the extending direction of the main support section 121 and the extending direction of the first support section 1221 is an obtuse angle.

As shown in fig. 1, optionally, the first support section 1221 may have an angle θ with the main support section 121 of 90 ° < θ < 180 °. The θ may be 120 °, 135 °, 150 ° or other angles satisfying the use requirement, which only needs to be satisfied to make the impedance of the main support section 121 and the impedance of the first support section 1221 generate a gentle transition, so that the Q value can be effectively improved, and then low insertion loss is realized, and good electrical performance is achieved.

Preferably, the first support section 1221 is disposed at an obtuse angle to the main support section 121 so as to be able to raise the Q value by 15%.

It should be noted that, when the coupling plane distance is a reference distance from the inner wall of the resonant cavity 21 connected to the support 12, the smaller the length of the main support section 121, the larger θ is, which is more advantageous for increasing the Q value. And, when the length of the main support section 121 is smaller, θ is larger, so that the frequency is lowered, and therefore, in actual use, the length of the main support section 121 can be reasonably set in consideration of the Q value and the comprehensive requirement of the frequency.

As shown in fig. 1, the support 12 further includes a second support section 1222. Wherein the first support section 1221 is connected to the planar coupling member 11 through the second support section 1222, i.e., one end of the second support section 1222 is connected to the first support section 1221, and the other end of the second support section 1222 is connected to the planar coupling member 11. And, the second support section 1222 extends in a direction perpendicular to the coupling plane, i.e., the second support section 1222 is disposed in parallel with the main support section 121. By the arrangement, the convex angle of the supporting piece 12 at the connecting part of the planar coupling piece 11 can be avoided, bending at the connecting part is avoided, adhesion of a subsequent surface coating is facilitated, arc breakdown in the current transmission process is avoided, and demolding in the processing process is facilitated.

In addition, the support 12 comprises a third support section (not shown) extending obliquely to the coupling plane, i.e. the third support section may be arranged obliquely to the horizontal. The first support section 1221 is connected to the planar coupling 11 by a third support section, i.e. one end of the third support section is connected to the first support section 1221 and the other end of the third support section is connected to the planar coupling 11. And, the first support section 1221 is disposed at an obtuse angle to the third support section, which is disposed at an obtuse angle to the main support section 121. In this way, the impedance of the main supporting section 121 and the impedance of the first supporting section 1221 are in a gentle transition, and the impedance of the first supporting section 1221 and the impedance of the third supporting section are in a gentle transition, so that the Q value can be more effectively improved, the low insertion loss can be better realized, the better electrical performance can be realized, the miniaturization requirement can be met, and the high suppression can be realized.

Optionally, the angle between the first support section 1221 and the third support section is α,90 ° < α < 180 °. The angle α may be 120 °, 135 °, 150 ° or other angles satisfying the use requirement, and only needs to be satisfied to make the impedance of the third support section and the impedance of the first support section 1221 generate a gentle transition, so that the Q value can be effectively improved, and then low insertion loss is achieved, and good electrical performance is achieved.

Referring to fig. 3 or 4, fig. 3 differs from fig. 4 in that the coupling arm 13 is connected at a different position, and the shape of the support arm is kept uniform. In one embodiment, the secondary support section 122 includes an arcuate connecting section 1223. The bottom end of the arc-shaped connecting section 1223 is connected to the main support section 121, and the top end of the arc-shaped connecting section 1223 is connected to the planar coupling member 11.

Referring to fig. 3 or 4, in one embodiment, the secondary support section 122 further includes a transition section 1224. The bottom end of the arcuate connecting section 1223 is connected to the main support section 121 by a transition section 1224.

Specifically, the arc of the arcuate connecting segment 1223 may be set according to actual needs, including but not limited to 120 ° -180 °, such as 120 °, 135 °, 150 °, 165 °, or 180 °.

Further, the transition section 1224 is specifically, for example, an arc-shaped transition section 1224, and the arc is smaller than the arc of the arc-shaped connecting section 1223, and specifically, for example, 30 °, 45 °, 60 °, 75 °,90 °, 120 °, and the like.

Referring to fig. 1, 2 and 5, in one embodiment, a filter includes a housing 20 and at least two resonators 10 disposed in the housing 20, the housing 20 is provided with at least two resonators 21, each resonator 10 is correspondingly disposed in each resonator 21, at least one resonator 10 is configured as the resonator 10 of any one of the embodiments, one end of a support 12 away from a planar coupling element 11 is connected to an inner wall of the resonator 21, and a free end of a coupling arm 13 is coupled to another resonator 10.

In the above filter, since the coupling arm 13 is connected to the curved auxiliary supporting section 122 or the planar coupling member 11, the other end of the coupling arm 13 is set as a free end and is used for coupling with another resonator 10, the extending direction of the coupling arm 13 is parallel to the coupling plane, so that a stronger capacitive coupling effect between the two resonators 10 can be achieved, and the lower the resonant frequency is, the influence on the resonant frequency of the filter is increased, the capacitive coupling bandwidth and the resonant frequency are respectively obviously greater than those of the probe type capacitive flying rod in the related art.

In one embodiment, the connection point of the end of the support 12 remote from the planar coupling member 11 and the inner wall of the corresponding single resonant cavity 21 is centered on the inner wall, so that the Q value can be effectively raised. Specifically, the Q value can be raised by 30%.

Referring to any one of fig. 5 to 8, in one embodiment, the housing 20 includes a peripheral frame having two open ends, a top plate (not shown), and a bottom plate. The top and bottom plates are connected to opposite ends of the peripheral frame, respectively, and each resonator 10 is connected to the bottom plate. One end of the supporting piece 12 far away from the plane coupling piece 11 is connected with the bottom plate in a welding or inserting mode, and the plane coupling piece 11 and the top plate are arranged at opposite intervals.

In one embodiment, the connection between the support 12 and the bottom plate is centered on the bottom wall of the resonant cavity 21, so that the Q value can be effectively increased. When the outline shape of the bottom wall of the resonant cavity 21 is rectangular, the connection part of the supporting piece 12 and the bottom plate is positioned at the intersection point of the diagonal line of the bottom wall of the resonant cavity 21, and when the outline shape of the bottom wall of the resonant cavity 21 is circular, the connection part of the supporting piece 12 and the bottom plate is positioned at the center of the bottom wall of the resonant cavity 21.

Referring to fig. 1 and 5, in one embodiment, the top plate is provided with at least one first adjustment hole communicating with the resonant cavity 21, and the planar coupling member 11 is provided with a second adjustment hole 111 correspondingly communicating with the first adjustment hole. The filter further comprises a first tuning piece 30, the first tuning piece 30 extends into the resonant cavity 21 through the first adjusting hole, and the first tuning piece 30 can reciprocate along the axial direction of the second adjusting hole 111 to adjust the frequency. In this way, the debugging piece moves reciprocally along the axial direction of the second adjusting hole 111, so that the depth of the debugging piece inserted into the resonant cavity 21 and the second adjusting hole 111 is adjusted, the frequency is adjusted, and the use requirement is met. Specifically, as the depth of insertion of the debugging member into the resonant cavity 21 and the second regulation hole 111 is deeper, the frequency is smaller; the frequency is increased as the depth of insertion of the tuning member into the resonant cavity 21 and the second tuning hole 111 is shallower.

Referring to fig. 1 and 5, in one embodiment, the top plate is further provided with at least one third adjustment hole in communication with the resonant cavity 21. A coupling window 22 is arranged between two adjacent resonant cavities 21 along the signal transmission path, a third adjusting hole is arranged corresponding to the position of the coupling window 22, the filter further comprises a second adjusting piece 40, the second adjusting piece 40 stretches into the resonant cavities 21 through the third adjusting hole, and the second adjusting piece 40 can reciprocate along the axial direction of the third adjusting hole to adjust the coupling quantity.

Wherein, the first test piece 30 may be in the form of a screw rod, and the first adjustment hole may be in the form of a screw hole, and the screw rod is in threaded fit with the screw hole, so as to realize axial reciprocating movement along the second adjustment hole 111. The second test piece 40 is similar and will not be described again.

Referring to fig. 5 to 10, the size of the window of the coupling window 22 can be flexibly adjusted and set according to actual requirements, or the window is set in the form shown in fig. 5 and 6, that is, more than 75% of the area of the wall plate 23 between the two resonant cavities 21 is hollowed out; alternatively, the window may be formed as shown in fig. 7 to 10, that is, 10% -30% of the area of the wall plate 23 between the two resonant cavities 21 may be hollowed out, so that the coupling arm 13 may pass through.

Referring to fig. 5 and fig. 7 to fig. 9, the resonator 10 can be rotated about its central axis by any angle to adjust its installation position in the resonant cavity 21, so long as the coupling arm 13 is coupled to another resonator 10 after passing through the corresponding coupling window 22.

Referring again to fig. 5, 7-9, the number of resonators 10 may be specifically set and adjusted according to practical needs, including but not limited to two, three, four, six, eight or any other number. For example, the number of resonators 10 shown in fig. 5, 7 and 8 is two, and the number of resonators 10 shown in fig. 9 is three.

As shown in fig. 1 and 5, in one embodiment, the central axis of the main support section 121 (shown as Z in fig. 1) is collinear with the central axis of the second adjustment aperture 111 (shown as Z in fig. 1). In this way, the whole resonator 10 can radiate signals more uniformly towards the inside of the resonant cavity 21, which is beneficial to ensuring good electrical performance; and, the central axis of main support section 121 and the central axis of second regulation hole 111 are collinear, and the junction of main support section 121 and bottom plate is located the geometric center of bottom plate again for the signal that the resonator 10 radiated to each lateral wall of circumference enclosure frame is more even, is favorable to guaranteeing good electric property more.

In addition, at least one of the top plate and the bottom plate is detachably connected with the peripheral frame. Therefore, the assembly mode can be flexibly selected according to the actual use requirement, the assembly difficulty is reduced, and the assembly efficiency is improved. Of course, at least one of the top plate and the bottom plate may be fixed to the peripheral frame by welding or the like.

The detachable connection mode can be realized by adopting a clamping connection mode, a screwing connection mode and other traditional modes.

In one embodiment, the top plate is detachably connected with the peripheral enclosing frame, when the resonator is assembled, the resonator 10 can be placed into the resonant cavity 21 from the top opening, so that one end of the supporting piece 12, which is far away from the planar coupling piece 11, is fixedly connected with the bottom plate in a plugging, welding or clamping mode, and the like, and then the top plate is covered on the top opening and is connected with the peripheral enclosing frame, and the frequency can be adjusted by adjusting the length of the debugging piece, which extends into the resonant cavity 21.

In an embodiment, the bottom plate is detachably connected with the peripheral enclosing frame, when assembling is performed, the end, away from the plane coupling piece 11, of the supporting piece 12 can be fixedly connected with the bottom plate in a plugging, welding or clamping mode, the peripheral enclosing frame with the bottom opening and the whole top plate are covered on the bottom plate from the upper part, the bottom plate is connected with the peripheral enclosing frame, the assembling connection of the supporting piece 12 and the bottom plate in the narrow resonant cavity 21 is omitted, the assembling difficulty is reduced, and the assembling efficiency is improved. The frequency can be adjusted by adjusting the length of the debugging piece extending into the resonant cavity 21.

Of course, in other embodiments, the bottom plate and the top plate may be detachably connected to the peripheral frame at the same time, so as to meet diversified assembly requirements.

The connection between the supporting element 12 and the bottom plate can be realized by welding, screwing, inserting or clamping, and the like, and only needs to meet stable and reliable connection and fixation.

When the outline shape of the bottom plate is rectangular, the geometric center is the intersection point of the diagonal lines of the bottom plate, and when the outline shape of the bottom plate is circular, the geometric center is the center of the bottom plate.

Wherein the support 12 is directly or indirectly connected to the base plate.

Referring to fig. 6 and 10, in one embodiment, each resonator 10 is integrally formed. Therefore, the assembly difficulty can be reduced, and the production cost is also reduced. The specific arrangement form of each resonator 10 can be flexibly adjusted or designed according to practical use requirements.

Referring to fig. 6 and 10, in one embodiment, two adjacent resonators 10 are connected by a coupling piece 50 and are integrally formed together.

Referring to fig. 1 and 5, in one embodiment, a communication device includes the filter of any of the above embodiments.

In the above communication device, since the coupling arm 13 is connected to the curved auxiliary supporting section 122 or the planar coupling member 11, the other end of the coupling arm 13 is set as a free end and is used for coupling with another resonator 10, the extending direction of the coupling arm 13 is parallel to the coupling plane, so that a stronger capacitive coupling effect between the two resonators 10 can be achieved, and the lower the resonant frequency is, the influence on the resonant frequency of the coupling arm is increased, the capacitive coupling bandwidth and the resonant frequency are respectively obviously greater than those of the probe type capacitive flying rod in the related art.

Referring to fig. 11 and 12, fig. 11 shows a simulation diagram of the far-end suppression of a filter with a probe type capacitive flying bar according to an embodiment of the related art. Fig. 12 shows a far-end rejection simulation of a filter according to an embodiment of the present application. As can be seen from fig. 11, the far-end suppression of the filter in the related art has many peaks at 6000MHz-13000MHz, i.e., the far-end suppression effect is poor. As can be seen from fig. 12, the filter in this embodiment has few peaks at 6000MHz-13000MHz in the far-end suppression, i.e., the far-end suppression effect is good. In addition, the far-end inhibition effect of the 6000MHz-9000MHz frequency band is obviously improved. In addition, in the embodiment, when 3000MHz-4000MHz is adopted, two peaks are arranged, and the positions of the peaks are relatively upper, so that the capacitive coupling bandwidth is relatively strong.

In the description of the present application, it should be understood that, if there are terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., these terms refer to the orientation or positional relationship based on the drawings, which are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first," "second," and the like, if any, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "plurality" and "a plurality" if any, mean at least two, such as two, three, etc., unless specifically defined otherwise.

In this application, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

In this application, unless expressly stated or limited otherwise, the meaning of a first feature being "on" or "off" a second feature, and the like, is that the first and second features are either in direct contact or in indirect contact through an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that if an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. If an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein, if any, are for descriptive purposes only and do not represent a unique embodiment.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the claims. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. A resonator, the resonator comprising:

a planar coupling having a coupling plane;

One end of the coupling arm is connected with the auxiliary supporting section or the plane coupling piece, the other end of the coupling arm is set to be a free end and is used for being coupled and connected with another resonator, and the extending direction of the coupling arm is parallel to the coupling plane; the coupling arm, the planar coupling piece and the supporting piece are of an integrated metal sheet structure.

2. The resonator of claim 1, wherein the coupling arm comprises any one or a combination of a straight arm, an arcuate arm, and a broken line arm.

3. The resonator according to claim 2, characterized in that the coupling arm, the planar coupling member and the support member are integrally formed by stamping, die casting, bending or forging.

4. The resonator according to claim 1, characterized in that the auxiliary support section comprises a first support section, which is connected to the main support section and is arranged at an obtuse angle.

5. The resonator according to claim 4, characterized in that the auxiliary support section further comprises a second support section, the first support section being connected to the planar coupling member by means of the second support section, and the second support section extending in a direction perpendicular to the coupling plane.

6. The resonator according to claim 4, characterized in that the auxiliary support section further comprises a third support section extending obliquely relative to the coupling plane, the first support section being connected to the planar coupling member via the third support section and the first support section being arranged at an obtuse angle to the third support section and the third support section being arranged at an obtuse angle to the main support section.

7. The resonator according to claim 1, characterized in that the auxiliary support section comprises an arc-shaped connecting section, the bottom end of which is connected to the main support section, and the top end of which is connected to the planar coupling element.

8. The resonator of claim 7, wherein the secondary support section further comprises a transition section, the bottom end of the arcuate connecting section being connected to the primary support section by the transition section.

9. A filter, characterized in that the filter comprises a housing and at least two resonators arranged in the housing, the housing is provided with at least two resonant cavities, each resonator is correspondingly arranged in each resonant cavity, at least one resonator is arranged as a resonator according to any one of claims 1 to 8, one end of the support piece far away from the planar coupling piece is connected with the inner wall of the resonant cavity, and the free end of the coupling arm is coupled with the other resonator.

10. The filter of claim 9, wherein a junction of an end of the support away from the planar coupling with an inner wall of the corresponding single resonant cavity is centered on the inner wall.

11. The filter of claim 9, wherein the housing includes a peripheral frame having two open ends, a top plate and a bottom plate, the top plate and the bottom plate being connected to opposite ends of the peripheral frame, respectively, each of the resonators being connected to the bottom plate; one end of the supporting piece, which is far away from the plane coupling piece, is connected with the bottom plate, and the plane coupling piece and the top plate are arranged at opposite intervals.

12. The filter of claim 11, wherein the top plate is provided with at least one first tuning aperture in communication with the resonant cavity, and the planar coupling is provided with a second tuning aperture in corresponding communication with the first tuning aperture; the filter further comprises a first debugging piece, the first debugging piece stretches into the resonant cavity through the first adjusting hole, and the first debugging piece can reciprocate along the axial direction of the second adjusting hole so as to adjust the frequency.

13. The filter of claim 12, wherein a central axis of the main support section is collinear with a central axis of the second adjustment aperture.

14. The filter according to claim 12, wherein the top plate is further provided with at least one third adjustment hole communicated with the resonant cavities, a coupling window is arranged between two adjacent resonant cavities along the signal transmission path, the third adjustment hole is arranged corresponding to the coupling window, the filter further comprises a second adjustment piece, the second adjustment piece extends into the resonant cavities through the third adjustment hole, and the second adjustment piece can reciprocate along the axial direction of the third adjustment hole to adjust the coupling amount.

15. The filter of claim 11, wherein at least one of the top plate and the bottom plate is detachably connected or welded to the peripheral frame.

16. A filter according to any of claims 9 to 15, wherein each of the resonators is integrally formed.

17. The filter of claim 16, wherein two adjacent resonators are connected by a coupling piece and are integrally formed together.

18. A communication device, characterized in that the communication device comprises a filter according to any of claims 9 to 17.