CN219287478U - Filter device and electronic apparatus - Google Patents

Abstract

The embodiment of the application discloses a filter device and electronic equipment; the filter device comprises a first filter and a second filter, wherein the first filter and the second filter are arranged in a lamination mode; the first filter comprises a first filter circuit, the first filter circuit is arranged along a first direction, the second filter comprises a second filter circuit, the second filter circuit is arranged along a second direction, and the first direction and the second direction form a target angle.

Description

Filter device and electronic apparatus

Technical Field

The application belongs to the technical field of electronic communication, and particularly relates to a filter device and electronic equipment.

Background

The filter is used as a core frequency selecting device in a receiving and transmitting system of the electronic equipment, and has the function of extracting or filtering signals with different frequencies in a communication system. The LTCC filter comprises a band-pass filter, a high-pass filter and a low-pass filter, and the frequency is from tens of MHz to 5.8GHz.

The LTCC filter is easy to radiate and to be disturbed because it uses a spatial spiral trace as an inductance and a plane parallel circuit as a capacitance. In particular, the mutual interference problem is easily caused when two filters are laid out together. At present, many electronic devices have a problem in the research and development process, and if the problem cannot be effectively solved, the performance of the electronic product will be affected.

Disclosure of Invention

The application aims to provide a filter device and electronic equipment, and solves the problem that two LTCC filters are easy to cause mutual interference when being laid together.

In order to solve the technical problems, the application is realized as follows:

in a first aspect, embodiments of the present application provide a filter device. The filter device includes: the first filter and the second filter are arranged in a stacked mode;

the first filter comprises a first filter circuit, the first filter circuit is arranged along a first direction, the second filter comprises a second filter circuit, the second filter circuit is arranged along a second direction, and the first direction and the second direction form a target angle.

In a second aspect, an embodiment of the present application proposes an electronic device, including:

a main board; a kind of electronic device with high-pressure air-conditioning system

The filter device according to the first aspect, wherein the filter device is disposed on the motherboard.

In the embodiment of the application, the filter device is provided, which may include two filters, and the two filters are laid out in a setting manner, and the layout manner can enable the two filters to have no problem of level or sensitivity mutual interference caused by too close distance of the layout, so that radiation of the whole filter device can be reduced, and interference resistance of the filter device can be enhanced.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, wherein:

fig. 1 is a schematic structural view of a first filter according to an embodiment of the present application;

fig. 2 is a schematic structural view of a filter device according to a first embodiment of the present application;

FIG. 3 is a schematic diagram of a filter device according to a second embodiment of the present application

Fig. 4 is a second schematic structural view of a filter device according to a second embodiment of the present application.

Reference numerals:

1. a first filter; 11. a first input port; 12. a first output port; 13. a first filter band; 14. a second filter band; 15. a third filter band; 2. a second filter; 21. a second input port; 22. a second output port; 3. a first line; 4. and a second line.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functionality throughout. The embodiments described below by referring to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The features of the terms "first", "second", and the like in the description and in the claims of this application may be used for descriptive or implicit inclusion of one or more such features. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present application.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

The filter device and the electronic device provided according to the embodiments of the present application are further described below with reference to fig. 1 to 4.

According to the filter device provided in the embodiments of the present application, referring to fig. 1 to 4, the filter device may include two filters, and the two filters are respectively: a first filter 1 and a second filter 2, wherein the first filter 1 and the second filter 2 are stacked; the first filter 1 comprises a first filter circuit, the first filter circuit is arranged along a first direction, the second filter 2 comprises a second filter circuit, the second filter circuit is arranged along a second direction, and the first direction and the second direction form a target angle.

According to the filter device provided by the embodiment of the application, the filter device comprises two filters, the two filters are designed to be distributed in a set arrangement mode, the distribution mode can effectively avoid the problem that the level or the sensitivity of the two filters are mutually interfered due to too close distribution, so that the radiation of the whole filter device can be reduced, the anti-interference performance of the filter device can be enhanced, and the filter device is more suitable for being applied to electronic equipment.

Specifically, in electronic devices such as mobile phones, the layout of a PCB board and the area of wiring are tense based on size limitation, and the filters are prone to mutual interference, so that two filters cannot be placed closer when layout is performed. For example, the PRX MIMO and DRX MIMO of N78 require a space of 1mm or more between the two filters in terms of layout if they have better isolation. This would lead to a larger layout space for the filter and also to a more complex routing of the PCB board.

According to the filter device provided by the embodiment of the application, the two filters, namely the first filter 1 and the second filter 2 are stacked up and down, and the internal circuits (filter circuits) of the two filters are laid out and routed at a set angle, so that the planar layout area is saved, and the problem of level or sensitivity mutual interference caused by the fact that the layout is close is solved.

Specifically, when the internal circuits of the first filter 1 and the second filter 2 are arranged at a target angle, the currents of the two filters may be intersected, and at this time, the magnetic field directions of the two filters also form a certain angle, so that the interference may be reduced to a certain extent.

That is, the filter device provided in the embodiment of the present application realizes the layout of two filters close to each other, and the two filters do not interfere with each other, which is beneficial to the assembly of the filter device in an electronic device.

In some examples of the present application, referring to fig. 2, the first direction and the second direction are perpendicular to each other, and the isolation between the first filter 1 and the second filter 2 is greater than or equal to 35db.

On the basis of the above example, referring to fig. 1 and 2, the current of the first filter 1 flows through the first filter 1 along a first target path, and the current of the second filter 2 flows through the second filter 2 along a second target path; the first target path and the second target path each include a plurality of sub-paths, and in a direction in which the first filter 1 and the second filter 2 are stacked, the first target path and the second target path form a perpendicular crossing state, so that a magnetic field direction of the first filter 1 and a magnetic field direction of the second filter 2 are perpendicular to each other.

The first filter 1 and the second filter 2 may have the same structure, and both include an input port of the filter and an output port of the filter. For example, referring to fig. 1, the first filter 1 includes a first input port 11 and a first output port 12 at both ends, respectively.

Depending on the layout angle of the first filter 1 and the second filter 2, the current direction and the direction of the magnetic field formed by the first filter 1 and the second filter 2 are different.

In the above example, referring to fig. 2, the first filter 1 and the second filter 2 forming the filter device are arranged vertically, so that the magnetic field directions of the two filters can be perpendicular to each other, which significantly reduces the degree of mutual coupling between the two filters that are close to each other, and thus can reduce or even eliminate the mutual interference between the first filter 1 and the second filter 2.

Through simulation, the following steps are found: when both filters are arranged in a lateral arrangement as in the first filter 1 and the second filter 2 described above, the isolation between the two is relatively poor, with an isolation of only 15db.

As shown in the above example of the present application, when the first filter 1 and the second filter 2 are designed to be stacked and vertically intersected, the isolation between the first filter 1 and the second filter 2 may reach 35db, or even more than 35db. This proves to be a great solution to the problem of mutual interference when two filters are close together.

It should be noted that, on the basis of stacking the first filter 1 and the second filter 2, the layout angles of the first filter 1 and the second filter 2 may be adjusted according to the requirement of the isolation, including but not limited to 90 degrees described above.

In the above example, by vertically laying out the internal circuits of the first filter 1 and the second filter 2, the two filters are integrated into one filter device, which not only saves layout area, but also solves the problems of level mutual interference and the like caused by the close layout of the two filters.

In some examples of the present application, the filter device may include a first filter 1 and a second filter 2, where the first filter 1 and the second filter 2 are stacked; the first filter 1 comprises a first filter circuit, the first filter circuit is arranged along a first direction, the second filter 2 comprises a second filter circuit, and the second filter circuit is arranged along a second direction; referring to fig. 3 and 4, the first direction and the second direction are parallel to each other, the first filter 1 is stacked on the second filter 2, and a routing layer is connected between the first filter 1 and the second filter 2, the routing layer can make the first current direction in the first filter 1 opposite to the second current direction in the second filter 2, and the magnetic field direction of the first filter 1 opposite to the magnetic field direction of the second filter 2.

In the above example, referring to fig. 3, by electrically connecting the first filter 1 and the second filter 2 through the routing layer in the above example, the purpose of this design is to make the current directions of the first filter 1 and the second filter 2 exactly opposite, so that the magnetic fields of the two filters can be opposite to each other, and thus cancel each other, so that external radiation is not generated, and external interference is not generated.

That is, a trace layer is added inside the filter device, the trace is consistent with the main path but the current flow is exactly opposite. Therefore, the filter device formed by the first filter 1 and the second filter 2 reduces the radiation to the outside considerably.

In fig. 4, the first filter 1 and the second filter 2 are stacked and parallel to each other, and only the first filter 1 is visible in a plan view. For a clear view of the second filter 2 located below said first filter 1, reference is made to fig. 3.

Optionally, referring to fig. 3, the first filter 1 includes a first input port 11 and a first output port 12 that are respectively disposed at two ends, and the second filter 2 includes a second input port 21 and a second output port 22 that are respectively disposed at two ends;

wherein, in the direction in which the first filter 1 and the second filter 2 are stacked, the first input port 11 corresponds to the second output port 22, and the first output port 12 corresponds to the second input port 21;

the wiring layer comprises a first circuit 3 and a second circuit 4;

the first input port 11 of the first filter 1 is electrically connected to the second output port 22 of the second filter 2 via the first line 3, and the first output port 12 of the first filter 1 is electrically connected to the second input port 21 of the second filter 2 via the second line 4.

Referring to fig. 3, fig. 3 shows a schematic diagram of a structure in which the first filter 1 and the second filter 2 are stacked, and the first filter 1 located at the upper layer and the second filter 2 located at the lower layer are identical in filtering circuit according to the direction shown in fig. 3. Specifically, the second input port 21 on the left side of the second filter 2 on the lower layer may be electrically connected to the first output port 12 on the right side of the first filter 1 on the upper layer through the second line 4, and the first input port 11 on the left side of the first filter 1 on the upper layer may be electrically connected to the second output port 22 on the right side of the second filter 2 on the lower layer through the first line 3.

On the basis of this, after the electrical signal has entered from the input port of the filter device, a part of the current flows away from the first filter 1, in particular from the first input port 11 to the first output port 12, and another part of the current flows away from the second filter 2, in particular from the second output port 22 to the second input port 21, which is designed such that the current directions in the first filter 1 and the second filter 2 are opposite, so that the EMI radiation is small.

In some examples of the present application, referring to fig. 1, the first filter 1 includes a first input port 11, a first output port 12, and a plurality of filter segments electrically connected in sequence along the first direction, and the plurality of filter segments are electrically connected between the first input port 11 and the first output port 12.

For example, with continued reference to fig. 1, the plurality of filter segments includes at least a first filter segment 13, a second filter segment 14, and a third filter segment 15; the first filter band 13, the second filter band 14 and the third filter band 15 respectively form different target paths so as to enable power to flow between the first input port 11 and the first output port 12 of the first filter 1 along the first filter band 13, the second filter band 14 and the third filter band 15.

It should be noted that, the first filter band 13, the second filter band 14, and the third filter band 15 may respectively form three different target paths, but the three filter bands are located in the same direction, and as shown in fig. 1, only the target paths formed by the filter bands are different, but the three filter bands are electrically connected in sequence. Optionally, the first filter 1 and the second filter 2 are LTCC filters.

Specifically, the low-temperature co-fired ceramic (LTCC) material adopts gold, silver, copper and the like with lower resistivity as conductive media, and an equivalent circuit is embedded in a ceramic body through metal via connection, so that the flexible selection of structural layout and the specific small size are realized. Can play an important role in improving the integration level, the reliability and the electrical performance of the filter device.

For example, one of the first filter 1 and the second filter 2 is a DRX filter, and the other of the first filter 1 and the second filter 2 is a PRX filter.

The filter device provided in this embodiment of the present application, the first filter 1 and the second filter 2 are integrated into a whole.

The space is saved when the filter device is assembled in the electronic equipment, and the two filters can be mutually close without interference.

According to another embodiment of the present application, an electronic device is presented. The electronic device includes: the mainboard and the filter device are arranged on the mainboard.

It should be noted that, the electronic device provided in the embodiment of the present application may be applied to, but not limited to, a mobile phone, and may also be applied to other types of electronic devices, for example, a tablet computer, a notebook computer, a navigator, or a wearable device, where the specific type of the electronic device is not limited in the embodiment of the present application.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A filter device, characterized by comprising a first filter (1) and a second filter (2), wherein the first filter (1) and the second filter (2) are arranged in a lamination manner;

the first filter (1) comprises a first filter circuit, the first filter circuit is arranged along a first direction, the second filter (2) comprises a second filter circuit, the second filter circuit is arranged along a second direction, and the first direction and the second direction form a target angle.

2. The filter device according to claim 1, wherein the first direction and the second direction are perpendicular to each other, and the isolation of the first filter (1) and the second filter (2) is not less than 35db.

3. The filter device according to claim 2, characterized in that the current of the first filter (1) flows through the first filter (1) along a first target path, and the current of the second filter (2) flows through the second filter (2) along a second target path;

wherein the first target path and the second target path each comprise a plurality of sub-paths, and in the direction in which the first filter (1) and the second filter (2) are overlapped, the first target path and the second target path form a vertical crossing state so that

The magnetic field direction of the first filter (1) is perpendicular to the magnetic field direction of the second filter (2).

4. The filter device according to claim 1, wherein the first direction and the second direction are parallel to each other, the first filter (1) is stacked on the second filter (2), and a routing layer is connected between the first filter (1) and the second filter (2), and the routing layer can make the flow direction of the first current in the first filter (1) and the flow direction of the second current in the second filter (2) opposite to each other, so that the magnetic field direction of the first filter (1) and the magnetic field direction of the second filter (2) are opposite.

5. The filter device according to claim 4, wherein the first filter (1) comprises a first input port (11) and a first output port (12) which are provided at both ends, and the second filter (2) comprises a second input port (21) and a second output port (22) which are provided at both ends; wherein in a direction in which the first filter (1) and the second filter (2) are stacked, the first input port (11) corresponds to the second output port (22), and the first output port (12) corresponds to the second input port (21);

the wiring layer comprises a first circuit (3) and a second circuit (4);

the first input port (11) of the first filter (1) is electrically connected to the second output port (22) of the second filter (2) by the first line (3), and the first output port (12) of the first filter (1) is electrically connected to the second input port (21) of the second filter (2) by the second line (4).

6. The filter device according to any of claims 1-5, wherein the first filter (1) comprises a first input port (11), a first output port (12) and a plurality of filter segments electrically connected in sequence along the first direction, and wherein the plurality of filter segments are electrically connected between the first input port (11) and the first output port (12).

7. The filter device according to claim 6, wherein the plurality of filter segments comprises at least a first filter segment (13), a second filter segment (14) and a third filter segment (15);

the first filter band (13), the second filter band (14) and the third filter band (15) respectively form different target paths so as to enable power flow to flow between the first input port (11) and the first output port (12) of the first filter (1) along the first filter band (13), the second filter band (14) and the third filter band (15).

8. The filter device according to claim 1, characterized in that the first filter (1) and the second filter (2) are LTCC filters.

9. The filter device according to claim 1, wherein one of the first filter (1) and the second filter (2) is a DRX filter, and the other of the first filter (1) and the second filter (2) is a PRX filter.

10. An electronic device, comprising:

a main board; a kind of electronic device with high-pressure air-conditioning system

The filter device according to any one of claims 1-9, being provided on the motherboard.

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