CN115458885B

CN115458885B - Radio frequency device

Info

Publication number: CN115458885B
Application number: CN202211311721.5A
Authority: CN
Inventors: 李青伟
Original assignee: Sichuan Hengwan Technology Co Ltd
Current assignee: Sichuan Hengwan Technology Co Ltd
Priority date: 2022-10-25
Filing date: 2022-10-25
Publication date: 2023-07-18
Anticipated expiration: 2042-10-25
Also published as: CN115458885A

Abstract

The embodiment of the invention discloses a radio frequency device, which utilizes a first part and a second part which are arranged on a shell part and is provided with a channel and a containing groove respectively. Meanwhile, a conductive portion is disposed on the insulating portion such that the conductive portion connects the inside and the outside of the case portion. Therefore, the connecting piece enters the inner side of the shell part through the channel, the elastic piece corresponds to the bottom of the accommodating groove, electromagnetic signals can be directly input to the inner side of the shell part from the outer side of the shell part, and the electromagnetic signals are prevented from being leaked and mutually interfered due to contact with the shell part. On the other hand, the elastic piece has the deformation amount towards the bottom of the accommodating groove, so that the assembly process of the radio frequency device is simplified. Meanwhile, the accommodating groove can be buckled around the connecting contact when the elastic piece is abutted with the connecting contact, so that the insulating part can avoid short circuit between the conductive part and the shell part.

Description

Radio frequency device

Technical Field

The invention relates to the technical field of communication, in particular to a radio frequency device.

Background

The radio frequency device plays an important role in the wireless communication technology, and the performance of the radio frequency device directly affects the performance of a wireless communication system. When the radio frequency device transmits electromagnetic signals, the stability of signal transmission needs to be ensured. How to reduce or even avoid the loss in the transmission of electromagnetic signals and the interaction between the radio frequency devices and the peripheral electronic devices becomes a problem to be solved.

Disclosure of Invention

In view of this, the embodiment of the invention provides a radio frequency device, in which the first portion and the second portion of the insulating portion are respectively extended into the inner side of the housing portion and exposed out of the housing portion, and the conductive portion is penetrated into the insulating portion, so as to achieve the purpose of reducing or even avoiding electromagnetic signal leakage.

The radio frequency device of the embodiment of the invention comprises:

a housing portion including a connection through hole;

the insulation part comprises a first part and a second part, the first part extends into the inner side of the shell part through the connecting through hole, the first part is provided with a channel, and the second part is provided with a containing groove which is opened towards the outer side of the shell part; and

the conductive part comprises a connecting piece and an elastic piece, wherein the connecting piece penetrates through the channel, one end of the connecting piece is arranged inside the shell part, the other end of the connecting piece is connected with the elastic piece, the elastic piece corresponds to at least part of the area of the bottom of the accommodating groove, and the elastic piece has deformation towards the bottom of the accommodating groove.

Further, the first part is a first boss, and a table top of the first boss extends out of the connecting through hole;

the conductive portion further includes:

the locating piece is arranged at the inner side of the shell part of the connecting piece and abuts against the first boss.

Further, the channel extends to the bottom of the accommodating groove;

the elastic piece is provided with a connecting hole, and the connecting piece is connected with the elastic piece through the connecting hole.

Further, the elastic member has a fixing area and a connecting area, and the connecting member is connected with the elastic member through the fixing area;

the elastic piece is in a free state, and the connecting area is at least partially positioned outside the accommodating groove.

Further, the elastic piece is of a sheet structure, a connecting hole is formed in the center of the fixing area, and the connecting area is provided with a convex contact protruding towards the outer side of the accommodating groove.

Further, the bottom of the shell part is provided with a mounting surface, the mounting surface is provided with a mounting groove, and the connecting through hole extends to the bottom of the mounting groove;

when the second part is installed in the installation groove, one side of the second part, which is away from the first part, is leveled with the installation surface.

Further, the housing part is provided with a second boss, the second boss is positioned at the bottom of the housing part and extends out along the extending direction of the mounting surface, and part of the mounting groove is positioned at the second boss;

the mounting groove is provided with a first notch, and the first notch is positioned at the table top of the second boss;

the accommodating groove is provided with a second notch corresponding to the first notch.

Further, the mounting surface is also provided with a glue groove, and at least part of the glue groove is arranged around the mounting groove.

Further, the number of the insulating parts and the number of the conducting parts are multiple and correspond to each other one by one, and the inner side of the shell part comprises at least one resonant cavity;

the radio frequency device further comprises:

the first resonator and the second resonator are arranged in the resonant cavity at intervals and are respectively and electrically connected with the conductive parts.

Further, the radio frequency device further includes:

the circuit board comprises a signal input contact and a signal output contact;

the shell part is arranged on one side of the circuit board, and the conductive parts are respectively and electrically connected with the signal input contact and the signal output contact.

Further, the circuit board includes:

a first mounting hole;

the first positioning holes are round holes, and the second positioning holes are racetrack-shaped and are arranged at intervals with the first positioning holes;

the housing portion further includes:

a second mounting hole; and

and the two positioning tables penetrate through the first positioning hole and the second positioning hole, and the first mounting hole and the second mounting hole correspond to each other.

Drawings

The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of one side of a radio frequency device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of another side of a RF device according to an embodiment of the present invention;

FIG. 3 is a schematic top view of a body of an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of an RF device in accordance with an embodiment of the present invention in an insulator position;

FIG. 5 is a schematic cross-sectional view of a housing portion of an embodiment of the present invention;

FIG. 6 is a schematic view of an assembly of an insulating portion and a conductive portion according to an embodiment of the present invention;

fig. 7 is a schematic structural view of an insulating part according to an embodiment of the present invention;

FIG. 8 is a schematic structural view of a radio frequency device of an embodiment of the present invention on a further side;

fig. 9 is a schematic structural view of a radio frequency device according to an embodiment of the present invention on a further side;

FIG. 10 is an exploded schematic view of a radio frequency device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a circuit board according to an embodiment of the present invention.

Reference numerals illustrate:

1-an insulating part;

11-a first part; 111-channel;

12-a second part; 121-a receiving groove; 1211-a second gap; 1212-an arcuate slot; 1213-rectangular slots;

122-U-shaped face;

13-mounting surface; 131-mounting slots; 1311-first gap; 132-a glue groove;

14-a second boss;

2-conductive parts;

21-a connector;

22-an elastic member; 221-connecting holes; 222-a fixed region; 223-linking region; 2231-bump;

23-positioning pieces;

3-a housing part;

31-connecting through holes; a 32-resonant cavity; 33-a second mounting hole; 34-positioning table; 35-cover plate; 351—an operation hole; 36-body; 361-U-shaped slots; 362-U-shaped recess;

a 4-resonator assembly; 41-a first resonator; 42-a second resonator; 43-a third resonator;

5-a circuit board;

51-signal input contacts; 52-signal output contacts; 53-a first mounting hole; 541-a first positioning hole; 542-second locating holes; 55-grounding part; 56-a connection; 57-U-shaped slit; 6-conducting resin;

7-an antenna assembly;

8-tuning pins.

Detailed Description

The present invention is described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in detail. The present invention will be fully understood by those skilled in the art without the details described herein. Well-known methods, procedures, flows, components and circuits have not been described in detail so as not to obscure the nature of the invention.

Moreover, those of ordinary skill in the art will appreciate that the drawings are provided herein for illustrative purposes and that the drawings are not necessarily drawn to scale.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly, as they may be fixed, removable, or integral, for example; 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 above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

Spatially relative terms, such as "inner," "outer," "lower," "upper," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that spatially relative terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Fig. 1 and 2 are schematic diagrams of a radio frequency device according to an embodiment of the present invention in two directions. The radio frequency device in the figure comprises a housing part 3, which housing part 3 is formed by a cover plate 35 and a body 36 which are fastened together.

Alternatively, the radio frequency device of the present embodiment includes, but is not limited to, a filter, a multiplexer, a coupler, a duplexer, a combiner, or the like.

Fig. 3 is a schematic top view of body 36. Fig. 4 and 5 are schematic cross-sectional views of the radio frequency device and the housing part 3 in the mounted position of the insulating part 1. The sectional position in fig. 4 and 5 is the area where the connection through hole 31 on the upper right in fig. 3 is located.

Fig. 6 is an assembly schematic diagram of the insulating part 1 and the conductive part 2. Fig. 7 is a schematic structural view of the insulating portion. In the figure, a part of the conductive part 2 is covered with an insulating part 1. The material of the conductive portion 2 includes, but is not limited to, copper, gold, iron, aluminum, silver, nickel, or alloys thereof, or combinations thereof. The material of the insulating portion 1 includes, but is not limited to, silicon dioxide, silicon oxynitride, silicon nitride, ABS resin, and the like. The person skilled in the art can select according to the frequency of the electromagnetic signal conducted by the radio frequency device, the strength of the signal or the distance between the signal and the radio frequency device.

As shown in fig. 1 to 7, the radio frequency device of the present embodiment includes a housing portion 3, an insulating portion 1, and a conductive portion 2. The case portion 3 is provided with a connection through hole 31. The insulating part 1 comprises a first part 11 and a second part 12, the first part 11 extends into the inner side of the housing part 3 through the connecting through hole 31, the first part 11 is provided with a channel 111, and the second part 12 is provided with a containing groove 121 which is opened towards the outer side of the housing part 3. The conductive part 2 includes a connection member 21 and an elastic member 22, and the connection member 21 passes through the passage 111 with one end disposed inside the housing part 3 and the other end connected to the elastic member 22. The elastic member 22 corresponds to at least a partial region of the bottom of the accommodating groove 121, and the elastic member 22 has a deformation amount toward the bottom of the accommodating groove 121.

In this embodiment, the inside of the housing 3 is a cavity surrounded by the side wall of the housing 3, and the outside of the housing 3 is a region spaced from the cavity and located outside the side wall. The present embodiment can conduct the electromagnetic signal collected by the elastic member 22 to one end of the connecting member 21, and finally to the inside of the housing portion 3 through the other end of the connecting member 21. Or the electromagnetic signal inside the housing part 3 is transmitted to the outside of the housing part 3, that is, the signal collected by the end of the connecting piece 21 located at the housing part 3 is transmitted to the position of the connecting piece 21.

The insulating portion 1 interposed between the case portion 3 and the conductive portion 2 serves to prevent the conductive portion 2 from shorting with the case portion 3. For this purpose, it is necessary to arrange at least a partial region of the first part 11 inside the cavity or to arrange the first part 11 completely inside the connecting through-hole 31, in which case the end face of the first part 11 facing the side of the cavity is flush with the end face of the connecting through-hole 31 on that side.

The radio frequency device of the embodiment of the invention utilizes the first part 11 and the second part 12 which are arranged on the shell part, and the first part 11 and the second part 12 are respectively provided with a channel 111 and a containing groove 121. Meanwhile, the conductive portion 2 is arranged on the insulating portion 1 such that the conductive portion 2 connects the inside and the outside of the housing portion 3. Therefore, the connecting piece 2 enters the inner side of the shell part 3 through the channel 111, the elastic piece 22 corresponds to the bottom of the accommodating groove 121, electromagnetic signals can be directly input to the inner side of the shell part 3 from the outer side of the shell part 3, and the electromagnetic signals are prevented from leaking and interfering with each other due to the contact with the shell part 3. On the other hand, the elastic member 22 has a deformation amount toward the bottom of the accommodating groove 121, which simplifies the assembling process of the rf device. Meanwhile, when the elastic member 22 abuts against the connection contact (indicated by a dot-dash line i in fig. 6), the accommodating groove 121 may be engaged around the connection contact, so that the insulating portion 1 can avoid shorting between the conductive portion 2 and the housing portion 3.

Specifically, the radio frequency device in this embodiment is a cavity filter. In the above embodiment the housing part 3 forms a cavity 32 inside. Through mutually supporting of insulating part 1, electrically conductive portion 2 and casing portion 3, can avoid electrically conductive portion 2 and casing portion 3 short circuit condition to take place for electromagnetic signal can't direct input to resonant cavity 32.

Specifically, the connecting member 21 has a strip-like structure with a circular cross section in the extending direction, and the length thereof can be adjusted according to the excitation mode of the cavity filter. For example, the probe may be coupled, and the strip structure may be configured to be short so that the end portion thereof can extend into the cavity 32. Also for example a ring coupling, in which case the strip structure may be configured longer so that it can extend along the resonant cavity 32. One form of connection is shown in fig. 4, where one end of the strip structure is connected to the resonator.

In some embodiments, as shown in fig. 1-7, the first portion 11 is a first boss having a mesa that extends from the connection through hole 31. The conductive part 2 further comprises a positioning member 23, which positioning member 23 is arranged at a position of the connecting member 21 located inside the housing part 3, the positioning member 23 abutting against the first boss. In this embodiment, the positioning member 23 can be used to limit the movement of the conductive portion 2 toward the outside of the resonant cavity 32, so that, when the conductive portion 2 and the insulating portion 1 are fixed to each other, a strip-like structure can be passed through the passage 111 so that the positioning member 23 abuts against the insulating portion 1. Then, the elastic member 22 is fixedly connected with the protruding end of the strip structure.

Specifically, fig. 4 shows a form of the positioning member 23, in which the positioning member 23 in this embodiment is a disc structure extending in the radial direction of the above-mentioned strip-like structure. In contrast, the first boss in the present embodiment is a cylindrical structure, and the inner wall of the cylindrical structure is a passage 111. The radial dimension of the disc structure is larger than the radial dimension of the strip-shaped structure, in order to avoid shorting together the positioning member 23 and the housing portion 3, the mesa of the first boss is arranged higher than the insulating portion 1, so that the positioning member 23 and the housing portion 3 have a space. When the conductive portion 2 is attached to the insulating portion 1, the wafer structure abuts against an end surface of the cylindrical structure.

Alternatively, the wafer structure and the strip structure can be manufactured in a casting or forging mode, and the integrally formed wafer structure and strip structure can simplify the manufacturing process of the radio frequency device and improve the electromagnetic signal conduction performance of the conductive part 2.

In some embodiments, as shown in fig. 1-7, the channel 111 extends to the bottom of the receiving groove 121. The elastic member 22 has a connection hole 221, and the connection member 21 is connected to the elastic member 22 through the connection hole 221. The channel 111 of the present embodiment communicates with the receiving groove 121, and eventually protrudes from the bottom of the receiving groove 121 during the continuous insertion of the connecting member 21 into the channel 111. In contrast, the connection hole 221 of the elastic member 22 corresponds to the passage 111, which allows the head of the connection member 21 to pass through the connection hole 221 at the same time, thereby facilitating the connection of the connection member 21 and the elastic member 22 to each other.

In some embodiments, as shown in fig. 1-7, the elastic member 22 and the connecting member 21, the resonator and the housing portion 3, and the cover plate 35 and the body 36 may be all connected by reflow soldering. Thereby improving the production efficiency of the product and ensuring the connection stability.

Alternatively, one end of the connection member 21 shown in fig. 6 is protruded from the connection hole 221 of the elastic member 22, and external threads may be provided at this position, and the elastic member 22 and the connection member 21 may be fixed to each other by nuts corresponding thereto so as to be detachably connected to each other.

In some embodiments, as shown in fig. 1-7, the elastic member 22 has a securing region 222 and a connecting region 223, and the connecting member 21 is connected to the elastic member 22 by the securing region 222. Meanwhile, the elastic member 22 is in a free state, and the connection region 223 is at least partially located outside the receiving groove 121. The free state of the elastic member 22 in this embodiment refers to a state when the elastic member 22 is not compressed. In this state, the connection region 223 of the elastic member 22 is tilted away from the accommodating groove 121. In this state, the connection contact corresponding to the connection region 223 can be brought into contact with ease. For example, when the cavity filter is mounted on the circuit board 5, the connection area 223 and the connection contact on the circuit board 5 can be directly pressed together, i.e. electrical connection can be achieved.

It will be readily appreciated that the related art will directly use a reflow soldering process to connect the connection region 223 with the circuit board 5. Or by spring pin connectors. But there are the following problems:

first, when there are more resonators, for example, a cavity filter having 64 resonators, it requires 128 connectors. Greatly increasing the manufacturing cost.

Secondly, when the size of the cavity filter is small, the corresponding size of the spring pin connector is small, so that the reliability of the spring performance in the cavity filter is obviously reduced.

Thirdly, the connection is performed by utilizing a welding mode, and the connection cannot be effectively separated. Adding difficulty to equipment maintenance and inspection. Meanwhile, the internal components of the cavity filter have undergone one reflow soldering in the manufacture, and the re-use of the reflow soldering can melt the internal solder, thereby causing the components to shift.

Specifically, the depth of the receiving groove 121 has a predetermined size. This dimension ensures that when the connection contacts press the connection region 223 into the receiving groove 121, a gap is maintained between the connection region 223 and the bottom of the receiving groove 121. Thus, on the premise that the fixed mounting of the cavity filter and the circuit board 5 needs to have a certain mechanical strength, the present embodiment also ensures that the elastic member 22 abuts the connection region 223 against the connection contact by elastic force. That is, the excessive stress between the connection region 223 and the connection contact is avoided, which affects the electrical connection performance and causes damage to the circuit board 5.

In other words, when the receiving groove 121 is undersized. The connection region 223 is pressed by the connection contact to be completely abutted against the bottom of the receiving groove 121, which may subject the bottom of the receiving groove 121 to excessive stress. Meanwhile, the connection region 223 may be adhered to the bottom of the receiving groove 121 under a large stress for a long time.

Preferably, the connection contacts (as shown by the dot-dash line i in fig. 6) are arranged as one plane. The elastic member 22 is a spring, and the connecting region 223 of the spring has a protrusion 2231 protruding toward the outer side of the accommodating groove 121. The bump 2231 may be formed by a stamping process or the like. When the connection region 223 abuts against the connection contact, the contact area between the connection region and the connection contact can be ensured.

Alternatively, as shown in fig. 6 to 7, the fixing area 222 of the elastic sheet of the above embodiment includes an arc-shaped sheet, the connection hole 221 is located at the center of the arc-shaped sheet, and the connection area 223 is a strip-shaped sheet, where the strip-shaped sheet is connected to one side of the arc-shaped sheet. In contrast, the receiving groove 121 includes an arc-shaped groove 1212 and a rectangular groove 1213 which communicate, and the arc-shaped groove 1212 and the rectangular groove 1213 correspond to the arc-shaped piece and the band-shaped piece, respectively. When the arc-shaped piece is clamped in the arc-shaped groove 1212, the connecting hole 221 corresponds to the channel 111, and the strip-shaped piece is tilted away from the accommodating groove 121 and extends along the rectangular groove 1213. On the other hand, the width of the strip is slightly smaller than the width of the rectangular slot so that the rectangular slot 1213 can provide guidance for the movement of the strip while avoiding interference with each other.

Preferably, the arcuate slots 1212 are spaced from the arcuate sheets less than the rectangular slots 1213 are spaced from the strip-shaped sheets. Thus, when the arcuate tab is snapped into the arcuate slot 1212, the attachment hole 221 is facilitated to correspond to the channel 111.

It will be readily appreciated that the length of the strip is less than the length of the rectangular slot 1213. Thereby reducing or even avoiding direct radiation of electromagnetic signals within the strip onto the housing part.

In some embodiments, as shown in fig. 1 to 7, the bottom of the housing part 3 has a mounting surface 13, the mounting surface 13 is provided with a mounting groove 131, and the connection through hole 31 extends to the bottom of the mounting groove 131. The side of the second portion 12 facing away from the first portion 11 is flush with the mounting surface 13 when the second portion 12 is mounted in the mounting slot 131.

By the mounting groove 131 in the present embodiment, when the second portion 12 of the insulating part 1 is mounted in the mounting groove 131, the bottom of the second portion 12 can be at the same height as the mounting surface 13. Therefore, when the cavity filter is assembled with the circuit board 5, the flatness of the opposite sides of the cavity filter and the circuit board is ensured.

In some embodiments, as shown in fig. 1 to 7, the housing part 3 has a second boss 14, the second boss 14 is located at the bottom of the housing part 3 and protrudes in the extending direction of the mounting surface 13, and part of the mounting groove 131 is located at the second boss 14. The mounting slot 131 has a first notch 1311, the first notch 1311 being located at the mesa location of the second boss 14. The accommodating groove 121 has a second notch 1212 corresponding to the first notch 1311.

Specifically, the end surface of the second boss 14 at the position of the first notch 1311 is flush with the end surface of the second portion 12 at the position of the second notch 1211. To prevent electromagnetic signals of the elastic member 22 from radiating directly onto the housing part 3.

It is easy to understand that, when the cavity filter is mounted on the circuit board 5, in order to facilitate observation of the positional relationship between the connection position 223 and the connection contact, the mounting position of the insulating portion 1 is provided at the edge position of the housing portion 3, and the mounting groove 131 and the accommodation groove 121 are provided with the first notch 1311 and the second notch 1211, respectively. The operator can easily observe the contact condition and deformation state of the elastic member 22 during the installation process.

In some embodiments, as shown in fig. 1-7, the mounting surface 13 is further provided with glue grooves 132, at least a portion of the glue grooves 132 being disposed around the mounting groove 131. The glue groove 132 of the present embodiment is used for applying conductive glue or conductive paste thereon when the cavity filter is mounted with the circuit board 5. The conductive adhesive is an adhesive with certain conductivity after being solidified or dried. It can connect various conductive materials together to form an electrical path between the materials to be connected. When the mounting surface is attached to the circuit board, the circuit board can be formed by the body and the circuit board through the conductive adhesive.

Further, the glue groove 132 shown in fig. 2 includes a straight line groove including 2 pieces extending in the mounting surface length direction and 6 pieces extending in the mounting surface width direction, and a U-shaped groove 361. Wherein 3 glue grooves extending in the width direction are simultaneously communicated with 1 glue groove extending in the length direction. The U-shaped groove 361 is immediately adjacent to the conductive part 2 and surrounds the outside of the conductive part 2.

Further, there is a U-shaped recess 362 in the mounting surface 13, the U-shaped recess 362 being located outside the mounting groove 131 and adjacent to the mounting groove 131. When the insulating part 1 is mounted in the mounting groove 131, a partial region (bottom region) of the second portion 12 protrudes from the mounting groove 131 and forms a U-shaped groove 361 with the U-shaped recess 362.

Fig. 8 and 9 are schematic structural diagrams of radio frequency devices in other embodiments. Fig. 10 is an exploded view of the rf device. In the figure, a plurality of strip-shaped conductive adhesives 6 are provided at the bottom of the housing portion 3, that is, on the side facing the circuit board 5, whereas the grounding portion 55 is provided on the circuit board 5. So that the housing part 3 and the circuit board 5 can be electrically connected after being mounted. The housing part 3 is mounted on one side of the circuit board 5 in both figures. The position shown by the dash-dot line in fig. 8 is the antenna assembly 7 adjacent to the housing part 3. The housing part 3 is hereinafter exemplified as the housing of the cavity filter, unless otherwise indicated.

Fig. 11 is a schematic structural view of the circuit board 5. The circuit board 5 is shown with a metal pattern, with the 1 larger pattern in the middle being the ground 55. The smaller 8 stripe patterns on both sides are the connection portions 56. The connection 56 is for communicating electromagnetic signals with the cavity filter. The circuit board 5 further has 2 first mounting holes 53 connected to the housing portion 3, and first positioning holes 541 and second positioning holes 542 corresponding to the 2 first mounting holes 53, respectively.

In an alternative implementation, as shown in fig. 1-11, the rf device in the above embodiment is a cavity filter. The number of the insulating parts 1 and the conductive parts 2 of the radio frequency device of the embodiment is plural and corresponds to one another, and the inner side of the housing part 3 includes at least one resonant cavity 32. The radio frequency device further includes a first resonator 41 and a second resonator 42, where the first resonator 41 and the second resonator 42 are arranged at intervals in the resonant cavity 32 and are electrically connected to the conductive portions 2, respectively. Thereby, the losses of the cavity filter in and out electromagnetic signals are reduced. Interference between adjacent cavity filters is reduced.

In an alternative implementation, as shown in fig. 1-11, the cavity filter in the above embodiment may be combined with the circuit board 5 to form a radio frequency device, i.e. a filter assembly. The radio frequency device further comprises a circuit board 5. The circuit board 5 includes a signal input contact 51 and a signal output contact 52. The housing portion 3 is mounted on one side of the circuit board 5, and the plurality of conductive portions 2 are electrically connected to the signal input contacts 51 and the signal output contacts 52, respectively.

The filter assembly of the embodiment of the invention utilizes the first part 11 and the second part 12 which are arranged on the shell part, and the first part 11 and the second part 12 are respectively provided with a channel 111 and a containing groove 121. Meanwhile, the conductive portion 2 is arranged on the insulating portion 1 such that the conductive portion 2 connects the inside and the outside of the housing portion 3. Therefore, the connecting piece 2 enters the inner side of the shell part 3 through the channel 111, the elastic piece 22 corresponds to the bottom of the accommodating groove 121, electromagnetic signals can be directly input to the inner side of the shell part 3 from the outer side of the shell part 3, and the electromagnetic signals are prevented from leaking and interfering with each other due to the contact with the shell part 3. On the other hand, the elastic member 22 has a deformation amount toward the bottom of the accommodating groove 121, which simplifies the assembling process of the rf device. Meanwhile, when the elastic member 22 abuts against the connection contact (indicated by a dot-dash line i in fig. 6), the accommodating groove 121 may be engaged around the connection contact, so that the insulating portion 1 can avoid shorting between the conductive portion 2 and the housing portion 3.

It will be readily appreciated that one resonator assembly arrangement is shown in figure 3. In the figure, 4 dashed boxes respectively correspond to 4 resonant cavities 32, and a first resonator 41 and a second resonator 42 are arranged in each resonant cavity 32, and the first resonator 41 and the second resonator 42 are respectively connected with input and output positions of electromagnetic signals. A plurality of third resonators 43 are arranged between the first resonator 41 and the second resonator 42. After the electromagnetic signals entering the resonant cavity 32 are coupled in sequence through the first resonator 41, the plurality of third resonators 43 and the second resonator 42, the electromagnetic signals are finally transmitted to the circuit board through the second resonator 42. Thus, the 4 resonant cavities 32, that is, the 4 filtering channels, can realize that electromagnetic signals of 4 different frequency bands are filtered simultaneously, or a proper resonant cavity is selected for input according to the frequency band of the electromagnetic signals.

Therefore, the overall size of the cavity filter is larger than that of the cavity filter of the single resonant cavity, and in order to achieve stable communication connection between each resonant cavity 32 of the cavity filter and the circuit board 5, it is necessary to ensure stable connection between each conductive portion 2 and the signal input contact 51 and the signal output contact 52.

In this case, each elastic member 22 is configured to have a deformation amount toward the accommodating groove 121, so that each conductive portion 2 can be stably connected to the circuit board 5. Meanwhile, in order to facilitate the observation of the connection of the cavity filter to the circuit board 5, the connection through hole 31 on the housing part 3 is divided into the edge positions of the body 36 of the cavity filter, and the elastic members 22 are opened to the side of the circuit board 5 through the second notch 1211. In this state, the elastic member 22 is also at the edge position of the circuit board 5, and the operator can observe the connection condition of the elastic member 22 from the direction parallel to the circuit board 5 (indicated by arrow a in fig. 8).

It should be appreciated that in the processing of the parts, the depth of the plurality of mounting grooves 131 on the same body 36 in the above embodiment has a first dimensional tolerance, the thickness of the plurality of second portions 12 has a second dimensional tolerance, and the depth of each receiving groove 121 has a third dimensional tolerance. When each insulating portion 1 is mounted in each mounting groove 121, there is a possibility that a large difference in mounting accuracy may occur between each other, and therefore, the distance from the bottom of the conductive portion 2 to the circuit board 5 is difficult to secure. To ensure the assembly tolerances, the person skilled in the art can simultaneously increase the dimensional tolerances of the above-mentioned components, but at the same time also increase the production costs.

On this premise, the present embodiment uses the deformation of the elastic member 22 as compensation for the tolerance after the installation of the above-mentioned parts, so as to save the manufacturing cost of connection and improve the assembly efficiency. Meanwhile, the depth of the accommodating groove 121 is configured so that each connection region 223 will not contact with the bottom of the accommodating groove 121 even if it is immersed into the accommodating groove 121 after being pressed, so as to ensure that the stress of each conductive part 2 to the circuit board 5 is within a certain range.

Further, the elastic member 22 has a sheet structure, the center of the fixing region 222 has a connection hole 221, and the connection region 223 has a protrusion 2231 protruding toward the outside of the receiving groove 121.

The connecting region 223 in the present embodiment is inclined toward the outside of the accommodating groove 121 with respect to the fixing region 222 as a whole, and on the premise that the protrusion 2231 extends in the longitudinal direction of the connecting region 223, the connecting region 223 is further bent toward the side away from the accommodating groove 121. This makes the bump heights of the respective positions of the bump 2231 in the extending direction different. Therefore, when the plurality of elastic members 22 are abutted against the circuit board 5, the contact 2231 can well control the contact area between each connection area 223 and the circuit board 5, and the connection stability is improved. That is, when the elastic member 22 is less compressed, a position (a right broken line in fig. 6) of the protrusion 2231 away from the fixing region 222 abuts against the circuit board 5. When the elastic member 22 is compressed more, a position (left broken line in fig. 6) of the protrusion 2231 near the fixing region 222 abuts against the circuit board 5.

In some embodiments, as shown in fig. 1-11, the circuit board 5 has a metal pattern thereon including a ground portion 55 and a connection portion 56, and the signal input contact 51 and the signal output contact 52 in the above-described embodiment are located at the head of the connection portion 56. The grounding portion 55 is located at a position intermediate to the position and has a plurality of hollow regions corresponding to the connecting portions 55. The head of the connecting portion 56 extends into the hollow region and is spaced from the ground portion. A connection U-shaped slit 57 is formed between the grounding portion 55 and the connection portion 56 of the present embodiment. In contrast, the side of the second part 12 that is connected to the circuit board 5 is a U-shaped surface 122. The U-shaped surface 122 surrounds the U-shaped groove 361 in the above embodiment, and the U-shaped surface 122 corresponds to the U-shaped slit 57.

In other words, when the cavity filter is assembled with the circuit board 5, the insulating portion 1 is engaged with the substrate of the circuit board 5 by the engagement of the U-shaped surface 122 with the U-shaped slit 56. Thereby, the connection portion 56 is surrounded by the insulating portion 1 and the substrate of the circuit board 5, and shorting of the conductive portion 2 with other devices on the case portion 3 and the circuit board 5 can be avoided. And shorting of the connection portion 55 to the ground portion 56 is avoided.

It is to be easily understood that the glue groove 132 in the above embodiment corresponds to the grounding portion 55 of the present embodiment, and the housing portion 3 of the cavity filter can be grounded by the conductive glue 6 in the glue groove 132. The input and output of the electromagnetic signals of the cavity filter are realized by the conductive part 2 in the insulating part 1, so that the U-shaped groove 361 is arranged around the insulating part 1, and the conductive adhesive 6 is smeared in the U-shaped groove 361, thereby the electromagnetic signals on the shell part 3 can be conducted to the grounding part 55 of the circuit board 5 through the conductive adhesive 6. Thereby realizing shielding of electromagnetic signals in the area and preventing the electromagnetic signals from leaking outwards.

In some embodiments, as shown in fig. 1-11, the circuit board includes a first mounting hole 53, a first positioning hole 541, and a second positioning hole 542. The first positioning hole 541 is a circular hole, and the second positioning hole 542 is a racetrack and is spaced from the first positioning hole 541. The housing portion 3 further includes a second mounting hole 33 and two positioning stages 34, and when the two positioning stages 34 are inserted into the first positioning hole 541 and the second positioning hole 542, the first mounting hole 53 and the second mounting hole 33 correspond to each other.

Specifically, the cover plate 35 is further provided with operation holes 351 and tuning pins 8 corresponding to the first and second mounting holes 53 and 33. When the cavity filter and the circuit board 5 are spliced with each other, the first positioning hole 541 and the second positioning hole 542 are positioned, and then the screws penetrate into the first mounting hole 53 and the second mounting hole 33 through the operation hole 351, so that the two are positioned with each other.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A radio frequency device, the radio frequency device comprising:

a housing part (3) including a connection through hole (31);

the insulation part (1) comprises a first part (11) and a second part (12), wherein the first part (11) stretches into the inner side of the shell part (3) through the connecting through hole (31), the first part (11) is provided with a channel (111), and the second part (12) is provided with a containing groove (121) which is opened towards the outer side of the shell part (3); and

the conductive part (2) comprises a connecting piece (21) and an elastic piece (22), wherein the connecting piece (21) penetrates through the channel (111) and one end of the connecting piece is arranged inside the shell part (3), the other end of the connecting piece is connected with the elastic piece (22), the elastic piece (22) corresponds to at least part of the area at the bottom of the accommodating groove (121), and the elastic piece (22) has deformation towards the bottom of the accommodating groove (121);

the elastic piece (22) is provided with a connecting area (223), the connecting area (223) is a strip-shaped sheet, and the width of the strip-shaped sheet is smaller than the width of the accommodating groove (121);

the elastic element (22) is in a free state, and the connecting region (223) is at least partially located outside the accommodating groove (121).

2. The radio frequency device according to claim 1, characterized in that the first portion (11) is a first boss, the mesa of which protrudes from the connection via (31);

the conductive part (2) further includes:

and the positioning piece (23) is arranged at the inner side of the shell part (3) of the connecting piece (21), and the positioning piece (23) is abutted against the first boss.

3. The radio frequency device according to claim 2, characterized in that the channel (111) extends to the bottom of the receiving recess (121);

the elastic piece (22) is provided with a connecting hole (221), and the connecting piece (21) is connected with the elastic piece (22) through the connecting hole (221).

4. The radio frequency device according to claim 1, characterized in that the elastic element (22) has a fixing area (222), and the connection element (21) is connected to the elastic element (22) via the fixing area (222).

5. The radio frequency device according to claim 4, wherein the elastic member (22) has a sheet-like structure, the center of the fixing area (222) has a connection hole (221), and the connection area (223) has a protrusion (2231) protruding toward the outside of the receiving groove (121).

6. The radio frequency device according to claim 1, characterized in that the bottom of the housing part (3) has a mounting surface (13), the mounting surface (13) is provided with a mounting groove (131), and the connecting through hole (31) extends to the bottom of the mounting groove (131);

when the second part (12) is installed in the installation groove (131), one side of the second part (12) facing away from the first part (11) is leveled with the installation surface (13).

7. The radio frequency device according to claim 6, characterized in that the housing part (3) has a second boss (14), the second boss (14) being located at the bottom of the housing part (3) and protruding in the extension direction of the mounting surface (13), part of the mounting groove (131) being located at the second boss (14);

the mounting groove (131) is provided with a first notch (1311), and the first notch (1311) is positioned at the table top of the second boss (14);

the accommodation groove (121) has a second notch (1212) corresponding to the first notch (1311).

8. The radio frequency device according to claim 6, wherein the mounting surface (13) is further provided with glue grooves (132), at least part of the glue grooves (132) being arranged around the mounting groove (131).

9. The radio frequency device according to any one of claims 1-8, characterized in that the number of the insulating parts (1) and the conducting parts (2) is plural and corresponds one to one, the inside of the housing part (3) comprising at least one resonant cavity (32);

the radio frequency device further comprises:

the first resonator (41) and the second resonator (42) are arranged in the resonant cavity (32) at intervals and are respectively electrically connected with the conductive parts (2).

10. The radio frequency device of claim 9, further comprising:

a circuit board (5) including a signal input contact (51) and a signal output contact (52);

the shell part (3) is arranged on one side of the circuit board (5), and the plurality of conductive parts (2) are respectively and electrically connected with the signal input contact (51) and the signal output contact (52).

11. The radio frequency device of claim 10, wherein the circuit board comprises:

a first mounting hole (53);

a first positioning hole (541) and a second positioning hole (542), wherein the first positioning hole (541) is a round hole, and the second positioning hole (542) is a runway and is arranged at intervals with the first positioning hole (541);

the housing part (3) further comprises:

a second mounting hole (33); and

and two positioning tables (34) which are penetrated in the first positioning hole (541) and the second positioning hole (542), wherein the first mounting hole (53) and the second mounting hole (33) correspond to each other.