CN216671912U

CN216671912U - Wifi antenna module and terminal equipment

Info

Publication number: CN216671912U
Application number: CN202123071745.1U
Authority: CN
Inventors: 孔庆功
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-06-03
Anticipated expiration: 2031-12-08
Also published as: WO2023103547A1

Abstract

The application relates to the technical field of communication, provides a Wifi antenna module and terminal equipment, and Wifi antenna module includes: the antenna comprises a substrate, a plurality of antennas and metal wires, wherein the plurality of antennas with different frequency bands and the metal wires are arranged on the substrate at intervals; and the radiator is electrically connected with the metal wire. The utility model provides a pair of Wifi antenna module, through deploying a plurality of different frequency channel antennas on the base plate, and deploy the metal of setting up with the equal interval of a plurality of different frequency channel antennas and walk the line, walk line electricity with the irradiator and metal and be connected, form the route of Wifi antenna, this application is under the prerequisite of the metal of not influencing the base plate is walked, utilize irradiator and metal to walk line electricity and be connected and replaced the antenna, the quantity of antenna has been reduced, and new frequency channel has effectively been increased, the radiation efficiency of Wifi antenna has been promoted, the return loss of Wifi antenna has been reduced, thereby the performance of Wifi antenna has been strengthened, simultaneously also can solve the mutual coupling problem between the antenna because the antenna quantity is too much produced.

Description

Wifi antenna module and terminal equipment

Technical Field

The application relates to the technical field of communication, in particular to a Wifi antenna module and a terminal device.

Background

In actual life, no matter in the household field or the commercial field, more and more devices need to be connected to the network, the number of the devices borne by the original Wifi protocol is limited, and the use requirements of the public cannot be met. For example, the existing 5G terminal device has the problems of a large number of antennas, a complex antenna layout environment and the like, resulting in low antenna radiation efficiency and large return loss.

SUMMERY OF THE UTILITY MODEL

The main aim at of this application provides a Wifi antenna module and terminal equipment, and this Wifi antenna module can reduce the quantity of antenna, improves radiation efficiency, reduces return loss.

According to a first aspect of the present application, there is provided a Wifi antenna module, including: the antenna comprises a substrate, wherein a plurality of antennas with different frequency bands and metal wires arranged at intervals with the antennas are arranged on the substrate; and the radiator is electrically connected with the metal wire.

In an alternative of this application, still include first metal shrapnel, the through-hole has been seted up to the base plate, the irradiator runs through in proper order first metal shrapnel with the through-hole, just first metal shrapnel with the metal is walked the line electricity and is connected.

In an alternative of this application, still include second metal shell fragment, second metal shell fragment includes first electrically conductive end and the electrically conductive end of second, the irradiator electricity connect in first electrically conductive end, the metal is walked the line electricity and is connected in the electrically conductive end of second.

In an alternative of this application, the through-hole has been seted up to the base plate, the inner wall coating of through-hole has the conducting layer, the irradiator runs through the through-hole, the metal routing with the conducting layer electricity is connected.

In an alternative aspect of the present application, the radiator is any one of a screw, a pin, and a rivet, which are electrically conductive.

In an alternative of the present application, the resonant frequency of the Wifi antenna module is f, the propagation speed and the speed of light of the electromagnetic wave in the medium are c, the dielectric constant of the radiator is epsilon, and then the effective length d of the radiator satisfies the following conditions:

wherein, f is 6.5GHz, epsilon is 3.3-3.8, and c is 3.0 multiplied by 108 m/s.

In an alternative of the application, the effective length d of the radiator is 3.5mm-4 mm.

In an alternative of the present application, the effective length of the metal trace is 1mm-2 mm.

In an alternative of this application, the through-hole has been seted up at the edge of base plate, the irradiator runs through the through-hole, just the metal is walked the line and is followed the base plate the edge sets up.

According to a second aspect of the present application, there is provided a terminal device including a housing having a receiving cavity; and in the Wifi antenna module according to any one of the first aspect, the substrate and the radiator are both located in the accommodating cavity.

According to the Wifi antenna module and the terminal equipment provided by the embodiment of the application, through arranging a plurality of different frequency band antennas on the substrate, and arranging the metal wiring arranged at equal intervals with the plurality of different frequency band antennas, the radiator is electrically connected with the metal wiring to form a path of the Wifi antenna, under the premise that the metal wiring of the substrate is not affected, the radiator and the metal wiring are electrically connected to replace the antenna, so that the number of the antennas is reduced, the cost of the Wifi antenna is reduced, the radiator is effectively added with a new frequency band, the radiation efficiency of the Wifi antenna is improved, the return loss of the Wifi antenna is reduced, the performance of the Wifi antenna is enhanced, and meanwhile, the mutual coupling problem between the antennas with different frequency bands due to the fact that the number of the antennas is too large can be solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

Fig. 1 shows a partial structural schematic diagram of a terminal device according to an embodiment of the present application;

fig. 2 illustrates a cross-sectional view of a Wifi antenna module according to an embodiment of the present application;

fig. 3 illustrates a top view of the Wifi antenna module shown in fig. 2;

fig. 4 shows a cross-sectional view of a Wifi antenna module according to another embodiment of the present application;

fig. 5 illustrates a top view of the Wifi antenna module shown in fig. 4;

fig. 6 shows a cross-sectional view of a Wifi antenna module according to another embodiment of the present application;

fig. 7 illustrates a top view of the Wifi antenna module shown in fig. 6.

The reference numerals are explained below:

10. a housing; 11. an accommodating chamber; 20. a substrate; 21. routing; 30. a radiator; 40. a first metal spring sheet; 50. a second metal dome; 51. a first conductive end; 52. a second conductive terminal; 60. and a conductive layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Fig. 1 is a schematic partial structure diagram of a terminal device according to an embodiment of the present application, fig. 2 is a cross-sectional view of a Wifi antenna module according to an embodiment of the present application, and fig. 3 is a top view of the Wifi antenna module shown in fig. 2.

Referring to fig. 1 to 3, an embodiment of the present invention provides a terminal device, which may be, for example but not limited to, a Wifi router, a 5G terminal mobile phone, a tablet computer, and other devices having a wireless communication function.

The terminal equipment comprises a shell 10 and a Wifi antenna module, wherein the shell 10 is provided with an accommodating cavity 11, and the Wifi antenna module is positioned in the accommodating cavity 11. The Wifi antenna module comprises a substrate 20 and a radiating body 30, wherein the substrate 20 is provided with a plurality of antennas with different frequency bands and a metal wire 21 arranged at intervals with the antennas, and the radiating body 30 is electrically connected with the metal wire 21.

The plurality of antennas with different frequency bands disposed on the substrate 20 may be at least one of a 2G network antenna, a 3G network antenna, a 4G network antenna, and a 5G network antenna. The Wifi antenna module arranges a plurality of antennas with different frequency bands on the substrate 20, arranges the metal wires 21 arranged at intervals with the plurality of antennas with different frequency bands, and electrically connects the radiator 30 with the metal wires 21 to form a path of the Wifi6E antenna.

Wifi6E is a new 6GHz frequency band added outside the original 2.4GHz and 5GHz frequency bands, and the antenna bandwidth is 1.2 GHz. Wifi6E can rationally distribute network resources, and each device can obtain reasonable network resources to play a greater role. In the household field, the Wifi6E improves the bandwidth capacity, and can avoid mutual contention among devices for network bandwidth resources, which causes the situations of blocking and high delay of the household network; in the commercial field, for example, there is the demand that a large amount of equipment connect in public places such as airports, experience halls, restaurants, shopping malls, Wifi6E can also realize the connection reply of many equipment, lets the network bear more equipment connections simultaneously, satisfies user equipment connection demand in public places.

According to the Wifi antenna module and the terminal device provided by the embodiment of the application, the plurality of antennas with different frequency bands are deployed on the substrate 20, the metal wires 21 arranged at intervals with the plurality of antennas with different frequency bands are deployed, the radiator 30 is electrically connected with the metal wires 21, and a path of the Wifi6E antenna is formed. Under the prerequisite that does not influence the wiring of the metal wiring 21 of base plate 20, utilize irradiator 30 and the electric connection of metal wiring 21 to replace the antenna to reduce the quantity of antenna, reduced the cost of Wifi antenna, and irradiator 30 has effectively increased new frequency channel, promoted the radiation efficiency of Wifi antenna, reduced the return loss of Wifi antenna, thereby strengthened the performance of Wifi antenna, also can solve simultaneously because the mutual coupling problem between the antenna that a plurality of frequency channels that the antenna quantity is too much produced are different.

As shown in fig. 2-3, in order to electrically connect the radiator 30 and the substrate 20, the Wifi antenna module further includes a first metal elastic piece 40, a through hole is formed in the substrate 20, the radiator 30 sequentially penetrates through the first metal elastic piece 40 and the through hole, and the first metal elastic piece 40 is electrically connected to the metal trace 21. Specifically, along the extending direction of the substrate 20, a certain distance is provided between the metal trace 21 and the radiator 30, in order to electrically connect the two, the first metal elastic sheet 40 is sleeved on the periphery of the radiator 30, the radial dimension of the first metal elastic sheet 40 is greater than the maximum radial dimension of the radiator 30, the metal trace 21 is electrically connected with the first metal elastic sheet 40 in the circumferential direction, the first metal elastic sheet 40 is electrically connected with the radiator 30 due to being sleeved on the periphery of the radiator 30, so that the electrical connection between the radiator 30 and the metal trace 21 is realized through the first metal elastic sheet 40, and the first metal elastic sheet 40 has elasticity, so that the conduction between the radiator 30 and the metal trace 21 can be realized more stably.

Further, the first metal dome 40 not only can better connect the metal trace 21 and the radiator 30, but also can lengthen the overall length of the antenna. In order to increase the overall length of the Wifi antenna, the thickness of the first metal dome 40 is set to be 0.1mm-0.2 mm.

In some embodiments, the newly added frequency band of the Wifi antenna module is 5.925GHz-7.125GHz, which is 1.2GHz, and the resonant frequency is 6.5 GHz. The electromagnetic wavelength λ of the Wifi antenna can be calculated as:

wherein c is the propagation speed and the light speed of the electromagnetic wave in the medium, and c is 3.0 multiplied by 108 m/s; f is the resonant frequency of the antenna, and f is 6.5 GHz; epsilon is the dielectric constant of the envelope of the radiator 30, and epsilon is 3.3-3.8.

According to the antenna radiation theory, the effective length d of the radiator 30 satisfies the following condition:

the radiation requirement of the antenna can be met, and the energy can be radiated to the wireless space. Wifi antennas are generally tuned at a certain frequency and are effective over a band centered at this resonant frequency, but other antenna parameters vary with frequency, so the resonant frequency of the antenna is close to the center frequency of these more important parameters.

In addition, in view of the higher frequency of the new band, it can be realized by a very short radiator 30, and any one of a conductive screw, a pin, and a rivet is used as the radiator 30 of the antenna. When the radiator 30 is a screw, the corresponding through hole is a threaded hole, and the screw is in threaded connection with the threaded hole; when the radiator 30 is a pin, the corresponding through hole is a pin hole, and the pin hole are in transition fit; when the radiator 30 is a rivet, the corresponding through hole is a preformed hole, and the rivet passes through the preformed hole on the substrate 20 by a riveter.

Further, for the mode that the through hole is formed in the substrate 20 and the radiating body 30 is arranged in the through hole in an embedded mode, in all terminal devices, especially 5G terminal mobile phones and Wifi routers, the number of screws on the edge of the substrate 20 is large, the through hole can be formed in the edge of the substrate 20, the radiating body 30 penetrates through the through hole, and the metal wiring 21 is arranged along the edge of the substrate 20, so that the self structure of the 5G terminal mobile phone can be utilized, the space of the antenna is reasonably utilized, the design of the antenna is simplified, and meanwhile, the cost of the antenna is also reduced.

In some embodiments, the effective length d of the radiator 30 is 3.5mm to 4 mm. The effective length d of the radiator 30 refers to a length of the top of the radiator 30 from the substrate 20, i.e., an exposed length of the radiator 30.

In order to ensure the electrical length of the whole radiator 30, because the effective length d of the screw is 3.5mm-4mm, and the actual required length d of the radiator 30 is 6mm, the electrical length of the radiator needs to be increased through the metal wire 21, the environment around the antenna is integrated, and the effective length of the metal wire 21 is set to be 1mm-2mm, so that the integral resonant frequency of the Wifi antenna is 6.5GHz, a brand new frequency band is added, and the performance of the Wifi antenna is improved. Furthermore, tuning devices such as an inductor and a capacitor can be added to form a tuning circuit, so as to adjust the complex impedance of the Wifi antenna, thereby achieving the purpose of accurately adjusting the electrical length of the radiator 30 during operation.

It should be noted that the electrical length is usually the physical length of the wire divided by the ratio of the wave propagation speed in free space to the speed in the wire, and the electrical length of the antenna is usually expressed by the electromagnetic wavelength. Both the resonant frequency and the impedance are related to the electrical length of the Wifi antenna.

For the completeness of the scheme, the Wifi antenna module further comprises a matching system, and the matching system comprises a matching circuit and a frequency modulation module; the radiator 30 is connected to the matching circuit through a connector, and the matching circuit is connected to the frequency modulation module. The matching circuit adjusts the resonant frequency to the frequency band of the Wifi antenna, and the frequency modulation module converts the signals of the FM antenna after the frequency band is adjusted into signals needing to be output. In specific implementation, the radiator 30 (screw, rivet or pin) is connected to a matching circuit through a connector, and the matching circuit is used for assisting in adjusting the resonance of the Wifi antenna and playing a role in preventing static electricity. This connecting piece is for wantonly can realizing the structure of being connected Wifi antenna and matching circuit, like wire, screw, shell fragment or POGO PIN connector, during concrete implementation, technical personnel in the art can adopt other connected mode to connect the setting according to actual need.

It should be further noted that the substrate 20 in the present embodiment includes: any one of a ceramic Circuit Board, an alumina ceramic Circuit Board, an aluminum nitride ceramic Circuit Board, and a Printed Circuit Board (PCB Board). Taking a printed circuit board as an example, copper needs to be coated on the printed circuit board, specifically, an idle space on the printed circuit board is used as a reference surface and then filled with solid copper, and these copper areas are also called copper leakage areas or wiring 213, which are used for reducing the ground wire impedance, improving the anti-interference capability and reducing the voltage drop.

Fig. 4 illustrates a cross-sectional view of a Wifi antenna module according to another embodiment of the present application, and fig. 5 illustrates a top view of the Wifi antenna module illustrated in fig. 4.

Referring to fig. 4 to 5, an embodiment of the present invention further illustrates a Wifi antenna module, which is similar to the Wifi antenna module shown in fig. 2 and 3, except that the radiator 30 and the metal trace 21 are electrically connected in a different manner.

Specifically, the Wifi antenna module of the terminal device has no through hole on the substrate 20, i.e. the substrate 20 and the radiator 30 are independent of each other. The Wifi antenna module further includes a second metal dome 50, the second metal dome 50 includes a first conductive end 51 and a second conductive end 52, the radiator 30 is electrically connected to the first conductive end 51, and the metal trace 21 is electrically connected to the second conductive end 52. Specifically, the second metal dome 50 may be circular, irregular or elongated, and when the second metal dome 50 is circular, the first conductive end 51 and the second conductive end 52 are respectively located at any two different positions in the circumferential direction of the second metal dome 50; when the second metal dome 50 is shaped, the first conductive end 51 and the second conductive end 52 are respectively located at any two different positions of the outer edge of the second metal dome 50; when the second metal dome 50 is in a strip shape, the first conductive end 51 and the second conductive end 52 are respectively located at two ends of the second metal dome 50. It should be noted that the second metal elastic piece 50 may be set to any shape suitable for connecting the radiator 30 and the metal trace 21, and the second metal elastic piece 50 has elasticity, so that the conduction between the radiator 30 and the metal trace 21 can be more stably achieved.

Fig. 6 illustrates a cross-sectional view of a Wifi antenna module according to another embodiment of the present application, and fig. 7 illustrates a top view of the Wifi antenna module illustrated in fig. 6.

Referring to fig. 6 and 7, an embodiment of the present invention further illustrates a Wifi antenna module, which is similar to the Wifi antenna module shown in fig. 2 and 3, except that the radiator 30 and the metal trace 21 are electrically connected in a different manner.

Specifically, in the Wifi antenna module of the terminal device, the inner wall of the through hole is coated with the conductive layer 60, the radiator 30 penetrates through the through hole, and the metal trace 21 is electrically connected to the conductive layer 60. The radiator 30 penetrates the through hole, so that the radiator 30 is electrically connected to the conductive layer 60 coated on the inner wall of the through hole, and the metal trace 21 is extended to the inner wall of the through hole and electrically connected to the conductive layer 4 coated on the inner wall of the through hole, thereby electrically connecting the metal trace 21 and the radiator 30 through the conductive layer 60.

In other aspects, the radiator 30 may further include any one of a metal strip, a metal layer, or a flexible circuit board FPC. When the radiator 30 is a metal strip, the radiator 30 is disposed by hot melting or embedding; when the radiator 30 is a metal layer, the antenna radiator 30 is deployed in a laser etching manner; when the radiator 30 is a Flexible Printed Circuit (FPC), the radiator 30 is disposed by means of pasting.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A Wifi antenna module, comprising:

the antenna comprises a substrate, wherein a plurality of antennas with different frequency bands and metal wires arranged at intervals with the antennas are arranged on the substrate; and the number of the first and second groups,

and the radiator is electrically connected with the metal wire.

2. A Wifi antenna module according to claim 1, further comprising a first metal elastic sheet, wherein the substrate is provided with a through hole, the radiator sequentially penetrates through the first metal elastic sheet and the through hole, and the first metal elastic sheet is electrically connected to the metal trace.

3. A Wifi antenna module according to claim 1, further comprising a second metal dome, the second metal dome includes a first conductive end and a second conductive end, the radiator is electrically connected to the first conductive end, and the metal trace is electrically connected to the second conductive end.

4. A Wifi antenna module according to claim 1, characterized in that the substrate has a through hole, the inner wall of the through hole is coated with a conductive layer, the radiator penetrates through the through hole, and the metal trace is electrically connected to the conductive layer.

5. The Wifi antenna module of claim 1, wherein the radiator is any one of conductive screw, pin and rivet.

6. A Wifi antenna module as claimed in claim 1, wherein the resonant frequency of the Wifi antenna module is f, the propagation speed of electromagnetic wave in the medium is c, the dielectric constant of the radiator is e, and the effective length d of the radiator satisfies the following condition:

wherein, f is 6.5GHz, epsilon is 3.3-3.8, and c is 3.0 x 108 m/s.

7. A Wifi antenna module according to claim 1, characterized in that the effective length d of the radiator is 3.5mm-4 mm.

8. A Wifi antenna module according to claim 1, characterized in that the effective length of the metal trace is 1mm-2 mm.

9. A Wifi antenna module according to claim 1, characterized in that the edge of the substrate has a through hole, the radiator penetrates through the through hole, and the metal trace is disposed along the edge of the substrate.

10. A terminal device, comprising:

a housing having an accommodating chamber; and the number of the first and second groups,

the Wifi antenna module of any one of claims 1-9, the substrate and the radiator are both located within the receiving cavity.