CN115458885A

CN115458885A - Radio frequency device

Info

Publication number: CN115458885A
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: 2022-12-09
Anticipated expiration: 2042-10-25
Also published as: CN115458885B

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 a channel and a containing groove are respectively arranged on the first part and the second part. Meanwhile, the conductive portions are arranged on the insulating portion so that the conductive portions connect the inside and the outside of the case portion. From this, the connecting piece gets into casing portion inboard through the passageway, and the elastic component corresponds with the bottom of storage tank, can directly input electromagnetic signal to casing portion inboard by the casing portion outside, avoids contacting with casing portion, causes electromagnetic signal to reveal and mutual interference. On the other hand, the elastic piece has the deformation amount towards the bottom of the accommodating groove, so that the assembling process of the radio frequency device is simplified. Meanwhile, the accommodating groove can be buckled around the connecting contact when the elastic part is abutted against the connecting contact, so that the insulating part can avoid the conductive part from being in short circuit with 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

Radio frequency devices play an important role in wireless communication technology, and the performance of the radio frequency devices 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 during the transmission of electromagnetic signals and the mutual influence between radio frequency devices and between the radio frequency devices and peripheral electronic devices becomes the problem to be solved.

Disclosure of Invention

In view of this, embodiments of the present invention provide a radio frequency device, wherein the first portion and the second portion of the insulating portion respectively extend into the inside of the housing portion and are exposed outside of the housing portion, and the conductive portion is disposed in the insulating portion, so as to reduce or even avoid leakage of electromagnetic signals.

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

a housing portion including a connection through-hole;

the insulating 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 an accommodating groove which is formed towards the outer side of the shell part; and

the conducting part comprises a connecting piece and an elastic piece, wherein the connecting piece penetrates through the channel and one end of the connecting piece is arranged in 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 a direction towards the deformation of 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 positioning piece is arranged at the inner side position of the shell part of the connecting piece, and the positioning piece is abutted 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 region and a connecting region, and the connecting member is connected with the elastic member through the fixing region;

when the elastic piece is in a free state, 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.

Furthermore, 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 far away from the first part, is flush 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 on the second boss;

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

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

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

Furthermore, the number of the insulating parts and the number of the conducting parts are multiple and are in one-to-one correspondence, and the inner side of the shell part comprises at least one resonant cavity;

the radio frequency device further includes:

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

Further, the radio frequency device further includes:

a circuit board including a signal input contact and a signal output contact;

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

Further, the circuit board includes:

a first mounting hole;

the positioning structure comprises a first positioning hole and a second positioning hole, wherein the first positioning hole is a round hole, and the second positioning hole is of a runway shape and is arranged at an interval with the first positioning hole;

the housing portion further includes:

a second mounting hole; and

and the two positioning platforms are arranged in the first positioning hole and the second positioning hole in a penetrating manner, 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 the embodiments of the present invention with reference to the accompanying drawings, in which:

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

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

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

fig. 4 is a schematic cross-sectional view of a radio frequency device of an embodiment of the present invention at the location of an insulating portion;

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

FIG. 6 is a schematic view of an assembly of an insulating part and a conductive part of an embodiment of the 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 another side;

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

FIG. 10 is an exploded schematic view of a radio frequency device of 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.

Description of reference numerals:

1-an insulating part;

11-a first part; 111-channel;

12-a second part; 121-a receiving groove; 1211-second notch; 1212-an arc-shaped slot; 1213-rectangular grooves;

122-U-shaped face;

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

14-a second boss;

2-a conductive portion;

21-a connector;

22-an elastic member; 221-connection hole; 222-a fixation region; 223-a junction region; 2231-convex contact;

23-a positioning element;

3-a housing part;

31-connecting vias; 32-a resonant cavity; 33-a second mounting hole; 34-a positioning table; 35-a cover plate; 351-operation hole; 36-a body; 361-U-shaped groove; 362-U-shaped recess;

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

5-a circuit board;

51-signal input contacts; 52-signal output contact; 53-first mounting hole; 541-a first positioning hole; 542-second positioning hole; 55-a ground part; 56-a connecting part; 57-U shaped gap; 6-conductive adhesive;

7-an antenna assembly;

8-tuning pin.

Detailed Description

The present invention will be 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. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details. Well-known methods, procedures, components and circuits have not been described in detail so as not to obscure the present invention.

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

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean that, for example, they may be fixedly connected or detachably connected or integrally formed; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Spatially relative terms, such as "inner," "outer," "below," "beneath," "lower," "over," "upper," and the like, are 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 the 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 of an embodiment of the present invention in two directions. The illustrated rf device includes a housing portion 3, and the housing portion 3 is formed by fastening a cover 35 and a body 36.

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 top schematic view of body 36. Fig. 4 and 5 are schematic 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 region of the upper right connecting through-hole 31 in fig. 3.

Fig. 6 is a schematic view of the assembly of the insulating part 1 and the conductive part 2. Fig. 7 is a schematic view of the structure of the insulating portion. In the figure, a partial region of the conductive part 2 is covered by the insulating part 1. The material of the conductive portion 2 includes, but is not limited to, copper, gold, iron, aluminum, silver, nickel, and the like, or an alloy of the above materials, or a combination 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 skilled person can select the frequency, strength or distance of the electromagnetic signal conducted by 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 housing portion 3 is provided with a connection through hole 31. The insulating part 1 includes a first part 11 and a second part 12, the first part 11 extends into the inside of the housing part 3 through the connecting through hole 31, the first part 11 has a passage 111, and the second part 12 has a receiving groove 121 opened toward the outside of the housing part 3. The conductive part 2 includes a connection member 21 and an elastic member 22, the connection member 21 passing through the passage 111 and having 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.

The inner side of the case 3 in this embodiment is a cavity surrounded by a side wall of the case 3, and the outer side of the case 3 is a region spaced from the cavity and located outside the side wall. This embodiment is capable of conducting 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 portion 3 is transmitted to the outside of the housing portion 3, that is, the signal collected by the end of the housing portion 3 of the connecting member 21 is transmitted to the position of the connecting member 21.

The insulating portion 1 interposed between the housing portion 3 and the conductive portion 2 serves to prevent the conductive portion 2 from being short-circuited to the housing portion 3. For this purpose, it is necessary to arrange at least a partial region of the first portion 11 inside the cavity or to arrange the first portion 11 completely inside the connecting through-hole 31, in which case the end face of the first portion 11 facing 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 the channel 111 and the 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 case portion 3. Therefore, the connecting piece 2 enters the inside of the housing portion 3 through the channel 111, the elastic piece 22 corresponds to the bottom of the accommodating groove 121, and the electromagnetic signal can be directly input from the outside of the housing portion 3 to the inside of the housing portion 3, so that the electromagnetic signal leakage and mutual interference caused by contact with the housing portion 3 are avoided. On the other hand, the elastic element 22 has a deformation amount towards the bottom of the receiving groove 121, which simplifies the assembling process of the rf device. Meanwhile, the accommodating groove 121 may be engaged around the connection contact (indicated by a dot-dash line i in fig. 6) when the elastic member 22 abuts against the connection contact, so that the insulating portion 1 may prevent the conductive portion 2 from being short-circuited with the housing portion 3.

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

Specifically, the connecting member 21 is a strip-shaped structure, the cross section of the strip-shaped structure in the extending direction is circular, and the length of the strip-shaped structure can be adjusted according to the excitation mode of the cavity filter. Such as probe coupling, the strip structure may be configured to be short enough that its ends extend deep into the resonant cavity 32. Also for example, a loop coupling, the strip structure may be configured to be longer so that it extends along the resonant cavity 32. One form of connection is shown in figure 4, where one end of the strip-like structure is connected to the resonator.

In some embodiments, as shown in fig. 1-7, the first portion 11 is a first boss, the mesa of which extends from the connecting through-hole 31. The conductive part 2 further comprises a positioning member 23, the positioning member 23 is disposed at a position inside the housing part 3 of the connector 21, and the positioning member 23 abuts against the first boss. This embodiment can use the positioning member 23 to limit the movement of the conductive part 2 towards the outside of the resonant cavity 32, so that when the conductive part 2 and the insulating part 1 are fixed to each other, the strip-shaped structure can be passed through the channel 111 to make the positioning member 23 abut against the insulating part 1. The resilient member 22 is then fixedly connected to the protruding end of the bar-like structure.

In particular, figure 4 shows a form of positioning element 23, the positioning element 23 in this embodiment being in the form of a disc extending radially of the strip-like structure. In contrast, the first boss in this embodiment is a cylindrical structure, and the inner wall of the cylindrical structure is the passage 111. The radial dimension of the disc structure is larger than that of the strip structure, and in order to avoid short circuit between the positioning member 23 and the housing portion 3, the mesa of the first boss is set higher than the insulating portion 1, so that the positioning member 23 and the housing portion 3 have a gap. When the conductive part 2 and the insulating part 1 are mounted, the disc structure abuts against the end face of the cylindrical structure.

Optionally, the wafer structure and the strip structure may be manufactured by casting or forging, and the like, and the integrated wafer structure and the strip structure may simplify a manufacturing process of the radio frequency device, and improve a conductive performance of the conductive portion 2 to the electromagnetic signal.

In some embodiments, as shown in fig. 1 to 7, the channel 111 extends to the bottom of the accommodating 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 is communicated with the receiving slot 121, and the connecting member 21 will finally extend out from the bottom of the receiving slot 121 during the process of continuously inserting 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 simultaneously pass through the connection hole 221, 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 35 and the body 36 may be 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 protrudes from the connection hole 221 of the elastic member 22, and an external thread may be provided at this position, and the elastic member 22 and the connection member 21 are fixed to each other by a nut 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 fixing region 222 and a connecting region 223, and the connecting member 21 is connected to the elastic member 22 through the fixing region 222. Meanwhile, in the free state of the elastic element 22, the connection region 223 is at least partially located outside the accommodating groove 121. The free state of the elastic member 22 in this embodiment is a state in which the elastic member 22 is not compressed. In this state, the connection region 223 of the elastic member 22 is tilted in a direction away from the receiving groove 121. In this state, the connection contact corresponding to the connection region 223 can be easily brought into contact. For example, when the cavity filter is mounted on the circuit board 5, the connection region 223 and the connection contact point 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 employ a reflow soldering process to join the connection region 223 and the circuit board 5 together. Or a pogo pin connector is used for connection. However, there are problems as follows:

first, when there are many resonators, such as a cavity filter with 64 resonators, 128 connectors are required. Greatly increasing the manufacturing cost.

Secondly, when the size of the cavity filter is small, the size of the corresponding spring pin connector is small, and therefore the performance reliability of the spring inside the cavity filter is obviously reduced.

Thirdly, the connection is carried out by welding, and the connection cannot be effectively separated. Adding difficulty to equipment maintenance and inspection. Meanwhile, the internal components of the cavity filter have undergone reflow soldering in the manufacturing process, and the reflow soldering is used again to melt the internal soldering tin, so that the components and parts are displaced.

Specifically, the depth of the receiving groove 121 has a predetermined size. This dimension ensures that when the connecting contact presses the connecting region 223 into the receiving groove 121, a gap is still maintained between the connecting region 223 and the bottom of the receiving groove 121. Therefore, 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 can also ensure that the elastic member 22 abuts the connection region 223 against the connection contact through the elastic force. That is, it is avoided that the electrical connection performance is affected and the circuit board 5 is damaged due to an excessive stress between the connection region 223 and the connection contact.

In other words, when the size of the accommodating groove 121 is too small. The connection region 223 is pressed by the connection contact and completely abuts against the bottom of the receiving groove 121, which may cause the bottom of the receiving groove 121 to be subjected to excessive stress. Meanwhile, under the action of a large stress for a long time, the connection region 223 may be adhered to the bottom of the accommodating groove 121.

The connection contacts (shown by the dotted line i in fig. 6) are preferably arranged as one plane. The elastic member 22 is a spring plate, and the connecting area 223 of the spring plate has a convex contact 2231 protruding toward the outside of the accommodating groove 121. The raised portion 2231 may be formed by stamping or the like. When the connection region 223 is brought into contact with the connection contact, the contact area between the two can be ensured.

Alternatively, as shown in fig. 6 to 7, the fixing region 222 of the spring plate of the above embodiment includes an arc-shaped plate, the connecting hole 221 is located at the center of the arc-shaped plate, and the connecting region 223 is a strip-shaped plate connected to one side of the arc-shaped plate. In contrast, the accommodation groove 121 includes an arc-shaped groove 1212 and a rectangular groove 1213 communicating therewith, and the arc-shaped groove 1212 and the rectangular groove 1213 correspond to the arc-shaped piece and the strip-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 tilts in a direction away from the accommodating groove 121 and extends along the rectangular groove 1213. The width of the strip, on the other hand, is slightly less than the width of the rectangular slot so that the rectangular slot 1213 provides a guide for the movement of the strip while avoiding interference with one another.

Preferably, the clearance between the arcuate slot 1212 and the arcuate tab is less than the clearance between the rectangular slot 1213 and the ribbon tab. Thus, when the arc-shaped sheet is snapped in the arc-shaped groove 1212, the connection hole 221 is facilitated to correspond to the channel 111.

It will be readily appreciated that the strip-shaped piece has a length less than the length of the rectangular slot 1213. Thereby reducing or even avoiding the direct radiation of electromagnetic signals within the strip-shaped sheet onto the housing portion.

In some embodiments, as shown in fig. 1 to 7, the bottom of the housing portion 3 has a mounting surface 13, the mounting surface 13 is opened 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, the side of the second part 12 facing away from the first part 11 is flush with the installation surface 13.

Through the installation groove 131 in the embodiment, when the second part 12 of the insulating part 1 is installed in the installation groove 131, the bottom of the second part 12 can be at the same height as the installation 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 portion 3 has a second protrusion 14, the second protrusion 14 is located at the bottom of the housing portion 3 and protrudes along the extending direction of the mounting surface 13, and a part of the mounting groove 131 is located at the second protrusion 14. The mounting groove 131 has a first notch 1311, and the first notch 1311 is located at the table-board position of the second boss 14. The receiving cavity 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 the electromagnetic signal of the elastic member 22 from being directly radiated to the housing portion 3.

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

In some embodiments, as shown in fig. 1-7, the mounting surface 13 further defines a glue groove 132, and at least a portion of the glue groove 132 is disposed around the mounting groove 131. The glue groove 132 of the present embodiment is used for coating a conductive glue or a conductive paste on the cavity filter when the cavity filter is mounted on the circuit board 5. The conductive adhesive is an adhesive which has certain conductivity after being cured or dried. It can connect multiple conductive materials together to form an electrical path between the connected materials. When the mounting surface is attached to the circuit board, the body and the circuit board can form a loop through the conductive adhesive.

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

Further, the mounting surface 13 has a U-shaped recess 362, and the U-shaped recess 362 is 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 part 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 views of a radio frequency device in further embodiments. Fig. 10 is an exploded view of the rf device. In the figure, a plurality of stripe-shaped conductive adhesives 6 are provided on the bottom of the case 3, that is, on the side facing the circuit board 5, and a ground 55 is provided on the circuit board 5. So that the housing portion 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 dotted line in fig. 8 shows the antenna component 7 adjacent to the housing part 3. Without specific illustration, the housing 3 is used as an example of the housing of the cavity filter.

Fig. 11 is a schematic structural view of the circuit board 5. There are metal patterns on the circuit board 5 in the figure, of which the middle 1 larger pattern is a ground 55. The smaller 8 band patterns on both sides are the connection portions 56. The connection 56 is used to communicate electromagnetic signals with the cavity filter. The circuit board 5 further has 2 first mounting holes 53 connected to the housing portion 3, and a first positioning hole 541 and a second positioning hole 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 conducting parts 2 of the radio frequency device of the embodiment is multiple and corresponds to one another, and the inner side of the housing part 3 comprises at least one resonant cavity 32. The rf device further includes a first resonator 41 and a second resonator 42, wherein the first resonator 41 and the second resonator 42 are spaced apart from each other in the resonant cavity 32 and are electrically connected to the conductive parts 2, respectively. Thereby, the loss of the cavity filter input and output electromagnetic signals is reduced. Interference between adjacent cavity filters is reduced.

In an alternative implementation, as shown in fig. 1 to 11, the cavity filter in the above embodiment may form a radio frequency device with the circuit board 5, and the radio frequency device is also a filtering component. The radio frequency device further comprises a circuit board 5. The circuit board 5 includes signal input contacts 51 and signal output contacts 52. The housing 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 contact 51 and the signal output contact 52, respectively.

The filter assembly according to the embodiment of the present invention utilizes the first portion 11 and the second portion 12 mounted on the housing, and the first portion 11 and the second portion 12 are respectively provided with the channel 111 and the receiving 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 part 2 enters the inside of the housing part 3 through the channel 111, the elastic part 22 corresponds to the bottom of the accommodating groove 121, and the electromagnetic signals can be directly input to the inside of the housing part 3 from the outside of the housing part 3, so that the electromagnetic signals are prevented from being leaked and interfered with each other due to contact with the housing part 3. On the other hand, the elastic element 22 has a deformation amount towards the bottom of the receiving groove 121, which simplifies the assembling process of the rf device. Meanwhile, the accommodating groove 121 may be engaged around the connection contact (indicated by a dot-dash line i in fig. 6) when the elastic member 22 abuts against the connection contact, so that the insulating portion 1 can prevent the conductive portion 2 from being short-circuited with 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 correspond to 4 resonant cavities 32, respectively, and each resonant cavity 32 is provided with a first resonator 41 and a second resonator 42, and the first resonator 41 and the second resonator 42 are connected to input and output positions of electromagnetic signals, respectively. A plurality of third resonators 43 are arranged between the first resonator 41 and the second resonator 42. The electromagnetic signal entering the resonant cavity 32 is coupled in sequence by the first resonator 41, the plurality of third resonators 43, and the second resonator 42, and is finally transmitted to the circuit board by the second resonator 42. Therefore, 4 resonant cavities 32, that is, 4 filtering channels, can simultaneously filter electromagnetic signals of 4 different frequency bands, or select a suitable resonant cavity for input according to the frequency band of the electromagnetic signals.

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

Under this condition, each elastic member 22 is arranged to have a deformation amount toward the accommodation 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 between the cavity filter and the circuit board 5, the connection through hole 31 of the housing 3 is divided into edge positions disposed on the body 36 of the cavity filter, and the elastic members 22 are all opened toward the side of the circuit board 5 through the second notch 1211. In this state, the elastic member 22 is also located at the edge of the circuit board 5, and the operator can observe the connection of the elastic member 22 from the direction parallel to the circuit board 5 (indicated by arrow a in fig. 8).

It should be understood that, in the processing of the components, the depths of the mounting grooves 131 on the same body 36 in the above embodiments have a first dimensional tolerance, the thicknesses of the second portions 12 have a second dimensional tolerance, and the depth of each receiving groove 121 has a third dimensional tolerance. When the respective insulating parts 1 are mounted in the respective mounting grooves 121, a large difference in fitting accuracy may occur therebetween, and therefore, the distance from the bottom of the conductive part 2 to the circuit board 5 is difficult to secure. In order to ensure the tolerances after assembly, the person skilled in the art can simultaneously increase the dimensional tolerances of the above-mentioned components, which, however, also increases the production costs accordingly.

Under the premise, the embodiment utilizes the deformation of the elastic part 22 as compensation for the tolerance of the parts after installation, thereby saving the manufacturing cost of the connection and improving the assembly efficiency. Meanwhile, the depth of the accommodating groove 121 is configured so that each connecting region 223 will not contact the bottom of the accommodating groove 121 even if it is submerged into the accommodating groove 121 after being pressed, thereby ensuring that the stress of each conductive part 2 on the circuit board 5 is within a certain range.

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

In the present embodiment, the connection region 223 is entirely inclined toward the outside of the receiving groove 121 with respect to the fixing region 222, and in this case, the convex contact 2231 extends in the length direction of the connection region 223, and the connection region 223 is further bent toward the side away from the receiving groove 121. This makes the projection height of the convex contact 2231 different at each position in the extending direction. Accordingly, when the plurality of elastic members 22 abut against the circuit board 5, the convex contact 2231 can control the contact area between each connection region 223 and the circuit board 5 well, thereby improving the connection stability. That is, when the elastic member 22 is less compressed, a position (right side dotted line in fig. 6) of the convex contact 2231 away from the fixed region 222 abuts against the circuit board 5. When the elastic member 22 is compressed more, a position (left dotted line in fig. 6) of the convex contact 2231 near the fixing region 222 abuts against the circuit board 5.

In some embodiments, as shown in fig. 1-11, the metal pattern on the circuit board 5 includes a grounding portion 55 and a connecting portion 56, and the signal input contact 51 and the signal output contact 52 in the above embodiments are located at the head of the connecting portion 56. The land portion 55 is located at an intermediate position and has a plurality of vacant areas corresponding to the connection portions 55. The connecting portion 56 has a head portion penetrating into the hollow region and spaced from the ground portion. The grounding portion 55 and the connecting portion 56 of the present embodiment form a connecting U-shaped slit 57 therebetween. On the other hand, the side of the second portion 12 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 insulation portion 1 is engaged with the substrate of the circuit board 5 by the engagement of the U-shaped surface 122 and the U-shaped slit 56. Thus, the connection portion 56 is sandwiched by the substrates of the insulating portion 1 and the circuit board 5, and the conductive portion 2 can be prevented from being short-circuited with the case portion 3 and other devices on the circuit board 5. And short-circuiting of the connection portion 55 and the ground portion 56 is avoided.

It is easily understood that the glue groove 132 in the above embodiment corresponds to the grounding portion 55 in the present embodiment, and the housing portion 3 of the cavity filter can be grounded through the conductive adhesive 6 in the glue groove 132. The input and output of the electromagnetic signal of the cavity filter are realized by the conductive part 2 in the insulating part 1, so that a U-shaped groove 361 is provided around the insulating part 1, and a conductive adhesive 6 is coated in the U-shaped groove 361, whereby the electromagnetic signal on the housing part 3 can be conducted to the grounding part 55 of the circuit board 5 via the conductive adhesive 6. Therefore, the electromagnetic signals in the area are shielded and prevented 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 track type and spaced apart 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 also provided with an operation hole 351 and a tuning pin 8 corresponding to the first mounting hole 53 and the second mounting hole 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 firstly positioned, and then screws are used to penetrate into the first mounting hole 53 and the second mounting hole 33 through the operation holes 351 so as to realize the mutual positioning of the two.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement 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, characterized in that the radio frequency device comprises:

a housing portion (3) including a connection through-hole (31);

the insulation part (1) comprises a first part (11) and a second part (12), the first part (11) extends 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) 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), the connecting piece (21) penetrates through the channel (111), one end of the connecting piece is arranged in 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 of the bottom of the accommodating groove (121), and the elastic piece (22) has a deformation amount facing the bottom of the accommodating groove (121).

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

the conductive part (2) further comprises:

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

3. The radio frequency device according to claim 2, wherein the channel (111) extends to a 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).

4. The radio frequency device according to claim 1, wherein the elastic member (22) has a fixing region (222) and a connecting region (223), the connecting member (21) being connected to the elastic member (22) through the fixing region (222);

when the elastic piece (22) is in a free state, the connecting area (223) is at least partially positioned outside the accommodating groove (121).

5. The RF device according to claim 4, wherein the elastic member (22) is a plate-like structure, the fixing region (222) has a connecting hole (221) at a center thereof, and the connecting region (223) has a convex contact (2231) protruding toward an outside of the receiving groove (121).

6. The radio frequency device according to claim 1, wherein the bottom of the housing portion (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) departing from the first part (11) is flush 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) is located at the bottom of the housing part (3) and protrudes along the extending direction of the mounting surface (13), and part of the mounting groove (131) is located at the second boss (14);

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

the accommodating groove (121) is provided with 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 a glue groove (132), and at least a part of the glue groove (132) is arranged around the mounting groove (131).

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

the radio frequency device further includes:

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

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

a circuit board (5) comprising signal input contacts (51) and signal output contacts (52);

the shell part (3) is arranged on one side of the circuit board (5), and the conductive parts (2) are respectively 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);

the positioning structure comprises 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 in a runway shape and is arranged at intervals with the first positioning hole (541);

the housing portion (3) further comprises:

a second mounting hole (33); and

and the two positioning tables (34) are arranged in the first positioning hole (541) and the second positioning hole (542) in a penetrating mode, and the first mounting hole (53) and the second mounting hole (33) correspond to each other.