CN215771504U

CN215771504U - Resonator and filter

Info

Publication number: CN215771504U
Application number: CN202122328304.9U
Authority: CN
Inventors: 刘望; 钟志波
Original assignee: Anhui Tatfook Technology Co Ltd
Current assignee: Anhui Tatfook Technology Co Ltd
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2022-02-08
Anticipated expiration: 2031-09-24

Abstract

The utility model provides a resonator and a filter, wherein the resonator comprises a resonant cavity, the resonant cavity is provided with a resonant cavity and an open end, the resonator also comprises a cover plate which covers the open end and is connected with the resonant cavity, an adjusting component arranged on the cover plate, a resonant tube which is integrally formed with the resonant cavity, and a loading disc which is connected to the top end of the resonant tube, and the adjusting component acts on the cover plate to deform the cover plate so as to adjust the distance between the cover plate and the loading disc. According to the utility model, the resonance tube and the resonance cavity are integrally formed, and the top end of the resonance tube is connected with the loading disc, so that the defects of the traditional low-cost integrated resonance tube are overcome, the application range of the resonator is wider, the power range and the frequency range of the resonator are improved under the condition of low cost, and the product competitiveness is improved.

Description

Resonator and filter

Technical Field

The utility model relates to the technical field of filters, in particular to a resonator and a filter.

Background

The cavity filter is widely applied to the field of communication as a frequency selection device, in particular to the field of radio frequency communication. In a base station, a filter is used to select a communication signal and filter out clutter or interference signals outside the frequency of the communication signal.

Referring to fig. 1, fig. 1 is a cross-sectional view of a resonator in the prior art, the prior art resonator includes a resonant cavity 10, a cover plate 20, a tuning screw 40, an adjusting nut 50 and a resonator tube 30, wherein the resonator tube 30 can be integrated with the resonant cavity 10, that is, the resonator tube 30 and the resonant cavity 10 are made of the same material and formed by the same process, and the cost of the resonator integrated with the prior art resonator cavity 10 is low. The top of the existing integrated resonance tube 30 cannot be capacitively loaded by a reel due to the fact that the existing integrated resonance tube cannot be demoulded and is not easy to machine, the frequency range and the power capacity are limited, and therefore the application range of the resonator is limited.

SUMMERY OF THE UTILITY MODEL

The utility model provides a resonator capable of improving power range and frequency range, and a filter using the same.

In a first aspect, a resonator is provided, which includes a resonant cavity, the resonant cavity has a resonant cavity and an open end, the resonator further includes a cover plate covering the open end and connected to the resonant cavity, an adjusting component disposed on the cover plate, a resonant tube integrally formed with the resonant cavity, and a loading disc connected to a top end of the resonant tube, and the adjusting component acts on the cover plate to deform the cover plate, so as to adjust a distance between the cover plate and the loading disc.

In a first possible implementation manner of the first aspect, the loading tray includes a main body portion, and an insertion portion fixedly connected to one side of the main body portion, the insertion portion is inserted into an opening of the top end of the resonator tube, and an end surface of the top end of the resonator tube abuts against the main body portion.

In a second possible implementation manner of the first aspect, the thickness of the loading plate along the axial direction of the resonator tubes is 1mm to 2 mm.

In a third possible implementation form of the first aspect, the loading plate is riveted to a top end of the resonator tube.

In a fourth possible implementation form of the first aspect, the loading plate is welded to a top end of the resonator tube.

In a fifth possible implementation manner of the first aspect, a groove is formed in a side of the cover plate facing away from the loading disc, a bottom of the groove faces the loading disc, the adjusting assembly includes a supporting plate covering an opening of the groove, a screw rod with one end penetrating through the supporting plate and fixedly connected to the bottom of the groove, and a nut sleeved outside the screw rod and matched with the screw rod, and the nut is located on a side of the supporting plate facing away from the bottom of the groove.

In a sixth possible implementation manner of the first aspect, the screw is connected with the bottom of the groove in a press-riveting manner.

In a seventh possible implementation manner of the first aspect, the screw is connected with the bottom knurl of the groove.

In an eighth possible implementation manner of the first aspect, the screw is welded to the bottom of the groove.

In a second aspect, a filter is provided, which comprises at least one resonator provided in the first aspect.

According to the resonator of the first aspect provided by various embodiments, the resonator tube and the resonant cavity are integrally formed, and the top end of the resonator tube is connected with the loading disc, so that the capacitance value of the resonator tube can be increased, the frequency of the resonator tube can be reduced, the power capacity of the resonator tube can be increased, the defect of the traditional low-cost integrated resonator tube can be overcome, the application range of the resonator is wider, the power range and the frequency range of the resonator can be improved under the low-cost condition, and the product competitiveness can be improved.

Drawings

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

Figure 1 is a cross-sectional view of a resonator provided by the prior art;

fig. 2 is a sectional view of a resonator provided in an embodiment of the present invention.

Wherein, in the figures, the respective reference numerals:

10. a resonant cavity; 101. a resonant cavity; 20. a cover plate; 201. a groove; 30. a resonant tube; 40. a tuning screw; 50. adjusting the nut; 60. an adjustment assembly; 61. a support plate; 62. a screw; 63. a nut; 70. a loading tray; 71. a main body portion; 72. a plug-in part.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

Fig. 2 is a cross-sectional view of a resonator according to an embodiment of the utility model. The resonator includes: a resonant cavity 10, a cover plate 20 and a resonant tube 30. Further, the resonator further comprises an adjusting assembly 60 and a loading disc 70.

The resonant cavity 10 is a metal cavity, and the resonant cavity 10 may be made of a metal material as a whole or at least a cavity with a metalized inner surface, and has a resonant cavity 101 and an open end. The cover plate 20 covers the opening end and is connected with the resonant cavity 10, and the cover plate 20 and the resonant cavity 10 can be connected by screws or the like.

The resonator tube 30 is located within the resonator cavity 101. In the present embodiment, the resonator tube 30 is integrally formed with the resonator chamber 10, that is, the resonator tube 30 is integrally formed on the inner side surface of the bottom of the resonator chamber 10.

The loading plate 70 is connected to the top ends of the resonator tubes 30. In the present embodiment, the capacitance of the resonator tube 30 is increased, the frequency of the resonator tube 30 is decreased, and the power capacity of the resonator tube 30 is increased by connecting one capacitive load plate 70 to the open end of the resonator tube 30.

The adjusting assembly 60 is disposed on the cover plate 20, and the adjusting assembly 60 is configured to act on the cover plate 20 to deform the cover plate 20, so as to adjust a distance between the cover plate 20 and the loading tray 70. In the present embodiment, the cover plate 20 is continuously deformed by the adjusting assembly 60, so that the distance between the cover plate 20 and the loading disc 70 is adjustable.

In this embodiment, the loading plate 70 faces the cover plate 20, a plate capacitor C is formed between the cover plate 20 and the resonant plate, the frequency property of the resonator is changed by changing the size of the plate capacitor C, and the size of the plate capacitor C is related to the distance between the cover plate 20 and the loading plate 70. Therefore, the resonant frequency of the resonator is changed by changing the distance between the cover plate 20 and the load plate 70. The resonant frequency of the resonator is calculated as F1/2 pi sqrt (L C), where F is the resonant frequency, pi is a constant, L is inductance, and the larger the plate capacitance C, the lower the resonant frequency F, the smaller the plate capacitance C, and the higher the resonant frequency F.

The resonator provided by the embodiment is formed by integrally forming the resonator tube 30 and the resonant cavity 10, and connecting the loading disc 70 to the top end of the resonator tube 30, so that the capacitance of the resonator tube 30 can be increased, the frequency of the resonator tube 30 can be reduced, the power capacity of the resonator tube 30 can be increased, the defect of the traditional low-cost integrated resonator tube 30 can be overcome, the application range of the resonator is wider, the power range and the frequency range of the resonator are improved under the condition of low cost, and the product competitiveness is improved.

In one embodiment, the load tray 70 includes a body portion 71 and a socket portion 72. The main body 71 is disc-shaped, the insertion part 72 is cylindrical and is fixedly connected to one side of the main body 71, the insertion part 72 is inserted into an opening at the top end of the resonator tube 30, and the end surface of the top end of the resonator tube 30 abuts against the main body 71.

In this embodiment, the top end of the resonator tube 30 refers to an end of the resonator tube 30 close to the cover plate 20, the top end of the resonator tube 30 is open, and the loading plate 70 is connected to the resonator tube 30 through the insertion part 72. The end surface of the top end of the resonator tube 30 abuts against the end surface of the body portion 71 to which the mating portion 72 is connected, so that the loading tray 70 is positioned when the loading tray 70 is mounted.

Preferably, the main body portion 71 and the inserting portion 72 are integrally formed, for example, the main body portion 71 and the inserting portion 72 are formed by using the same material and the same process.

In an embodiment, the loading plate 70 has a thickness in the axial direction of the resonator tubes 30 of 1mm to 2 mm. In this embodiment, the thickness of the loading tray 70 is small, so that it is impossible to perform mold stripping and machining. The thickness of the loading tray 70 mainly refers to the thickness of the body portion 71 of the loading tray 70.

In a specific application, the thickness of the loading plate 70 in the axial direction of the resonator tubes 30 may be 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, or the like.

In an embodiment, the loading plate 70 is riveted to the top end of the resonator tube 30. In the present embodiment, the loading plate 70 and the resonator tubes 30 are connected together by riveting, so that the connection strength is stable and reliable, and the operation process is simple.

In another embodiment, the loading plate 70 is welded to the top ends of the resonator tubes 30. In this embodiment, the loading plate 70 and the resonator tube 30 are connected together by welding, which has good connection performance, high rigidity of the welded structure, and good integrity.

In an embodiment, a groove 201 is formed in a side of the cover plate 20 facing away from the loading tray 70, a bottom of the groove 201 faces the loading tray 70, and the adjusting assembly 60 is disposed in the groove 201. The purpose of the groove 201 is to reduce the thickness of the deformed portion of the cover plate 20, so that the cover plate 20 can be deformed by the adjusting assembly 60 with a small external force, and the adjustability and tuning sensitivity of the filter can be improved; on the other hand, the overall height of the filter can be reduced, and the miniaturization and thinning of the filter are facilitated.

In this embodiment, the deformation of the cover plate 20 may include deformation of the cover plate 20 toward the direction approaching the loading disc 70, in which case the distance between the cover plate 20 and the loading disc 70 gradually decreases; the deformation of the cover plate 20 further includes deformation of the cover plate 20 in a direction away from the loading plate 70, in which the distance between the cover plate 20 and the loading plate 70 gradually increases.

In the present embodiment, by forming the groove 201 on the side of the cover plate 20 opposite to the loading plate 70, and disposing the adjusting component 60 in the groove 201, the adjustment assembly 60 is used to provide a force along the axial direction of the resonator tubes 30, to deform the bottom of the groove 201 to adjust the distance between the cover plate 20 and the loading plate 70, thereby adjusting the resonance frequency of the resonator, thereby eliminating the tuning screw 40 and the screw hole of the cover plate 20 of the conventional cavity filter, thereby avoiding the intermodulation performance and high-power index of the cavity filter from being influenced by the factors such as burrs and chips generated when the tuning screw 40 is matched with the threaded hole, improving the intermodulation performance and high-power performance of the product, meanwhile, the production passing rate of the product can be improved, the rejection rate of the product and the maintenance cost are reduced, and the market competitiveness of the product is improved.

In the present embodiment, the adjustment assembly 60 includes a support plate 61, a screw 62, and a nut 63. The supporting plate 61 covers the opening of the groove 201, one end of the screw 62 penetrates through the supporting plate 61 and is fixedly connected with the bottom of the groove 201, the nut 63 is sleeved outside the screw 62 and is matched with the screw 62, and the nut 63 is located on one side, back to the bottom of the groove 201, of the supporting plate 61.

In the present embodiment, the axial displacement of the support plate 61 is restricted, that is, the support plate 61 cannot move axially. When the nut 63 is rotated under the action of an external force, because the support plate 61 limits the displacement of the nut 63 towards the direction approaching the loading disc 70, a reaction force is applied to the screw 62, so that the screw 62 is displaced towards the direction away from the loading disc 70, and the bottom of the groove 201 fixedly connected with the screw is driven to deform towards the direction away from the loading disc 70, so that the distance between the loading disc 70 and the cover plate 20 is gradually increased.

It will be appreciated that in other embodiments, the nut 63 is axially fixed to the support plate 61, i.e. the axial relative position of the nut 63 to the support plate 61 remains unchanged, and the support plate 61 can rotate about the threaded rod 62. At this time, the axial displacement of the support plate 61 is also restricted. When the nut 63 is rotated in a first direction under the action of an external force, the support plate 61 rotates along with the nut 63, and since the axial displacement of the support plate 61 is limited, the axial displacement of the nut 63 is also limited, and a reaction force is applied to the screw 62, so that the screw 62 is displaced in a direction away from the loading disc 70, and further the bottom of the groove 201 fixedly connected with the screw is deformed in a direction away from the loading disc 70, so that the distance between the loading disc 70 and the cover plate 20 is gradually increased; when the nut 63 is rotated in a second direction opposite to the first direction under the action of an external force, the support plate 61 rotates along with the nut 63, and since the axial displacement of the support plate 61 is limited, the axial displacement of the nut 63 is also limited, a reaction force is applied to the screw 62, so that the screw 62 is displaced in a direction approaching the loading disc 70, and the bottom of the groove 201 fixedly connected with the screw is driven to deform in a direction approaching the loading disc 70, so that the distance between the loading disc 70 and the cover plate 20 is gradually reduced.

In one embodiment, the screw 62 is press-fit connected to the bottom of the groove 201. In the embodiment, the screw rod 62 is fixedly connected with the bottom of the groove 201 by adopting a press riveting connection mode, so that the connection strength is stable and reliable, and the operation process is simple.

In another embodiment, the screw 62 is knurled at the bottom of the groove 201. In the present embodiment, the screw 62 is fixedly connected to the bottom of the groove 201 by knurling, which results in high connection strength.

In yet another embodiment, the screw 62 is welded to the bottom of the groove 201. In this embodiment, the screw 62 is fixedly connected with the bottom of the groove 201 by welding, so that the connection performance is good, the rigidity of the welding structure is high, and the integrity is good.

The embodiment of the utility model also provides a filter which is formed by combining the resonators, wherein at least one of the resonators adopts the structure of the resonator. In general, the cover plates 20 of the respective resonators in the filter are combined into the cover plate 20 of the filter, and the resonators 101 of N resonators are referred to as N resonators 101 of the filter (N is an integer not less than 1).

The filter of the embodiment of the utility model can be used for a duplexer, and the duplexer comprises: the filter comprises a transmitting channel filter and a receiving channel filter, wherein the transmitting channel filter and the receiving channel filter adopt the filters for filtering. The transmitting channel filter is used for processing a transmitting signal of a transmitter, and the receiving channel filter is used for processing a receiving signal of a receiver.

The filter of the embodiment of the present invention can also be used in a multiplexer, where the multiplexer includes a plurality of transmit channel filters and a plurality of receive channel filters, and the transmit channel filters and the receive channel filters use the above filters for filtering. The transmitting channel filter is used for processing a transmitting signal of a transmitter, and the receiving channel filter is used for processing a receiving signal of a receiver.

The filter of the embodiment of the present invention can also be used for a communication device including at least one resonator as described above.

It is to be understood that the filter, duplexer or multiplexer provided in the above embodiments may be applied to a communication system, such as a communication device (e.g., a base station or a terminal), and may also be applied to a radar system, which may not be limited herein.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A resonator, characterized by: the resonator comprises a resonant cavity, a cover plate, an adjusting component, a resonant tube and a loading disc, wherein the resonant cavity is provided with a resonant cavity and an opening end, the cover plate covers the opening end and is connected with the resonant cavity, the adjusting component is arranged on the cover plate, the resonant tube is integrally formed with the resonant cavity, the loading disc is connected to the top end of the resonant tube, and the adjusting component acts on the cover plate to deform the cover plate so as to adjust the distance between the cover plate and the loading disc.

2. The resonator of claim 1, wherein: the loading disc comprises a main body part and an inserting part fixedly connected to one side of the main body part, the inserting part is inserted into an opening in the top end of the resonance tube, and the end face of the top end of the resonance tube is abutted to the main body part.

3. The resonator of claim 1, wherein: the thickness of the loading disc along the axial direction of the resonance tube is 1 mm-2 mm.

4. The resonator of claim 1, wherein: the loading disc is riveted with the top end of the resonance tube.

5. The resonator of claim 1, wherein: and the loading disc is welded with the top end of the resonance tube.

6. The resonator of claim 1, wherein: the adjusting component comprises a supporting plate, a screw rod and a nut, wherein the supporting plate is arranged to cover an opening of the groove, one end of the screw rod penetrates through the supporting plate and then is fixedly connected with the bottom of the groove, the nut is sleeved outside the screw rod and is matched with the screw rod, and the nut is located on one side, back to the bottom of the groove, of the supporting plate.

7. The resonator of claim 6, wherein: the screw rod is connected with the bottom of the groove in a press riveting mode.

8. The resonator of claim 6, wherein: the screw is connected with the bottom knurl of the groove.

9. The resonator of claim 6, wherein: the screw rod is welded with the bottom of the groove.

10. A filter, characterized by: comprising at least one resonator according to any of claims 1 to 9.