CN113594672A - Antenna structure, control method of antenna structure and terminal equipment - Google Patents

Abstract

The disclosure relates to an antenna structure, a control method of the antenna structure and a terminal device, wherein the antenna structure is applied to the terminal device, a metal structure is arranged on a shell of the terminal device, the antenna structure at least comprises a feed branch, and the feed branch is respectively and electrically connected with the metal structure and a control chip of the terminal device; when the control chip of the terminal equipment needs to send or receive signals, the metal structure forms a signal radiation part of the antenna structure so as to receive or send the signals. The antenna structure in this disclosure utilizes original metal structure on the terminal equipment casing as the radiation portion to receive or send signal, reduce the antenna quantity that sets up in the terminal equipment, conveniently carry out the overall arrangement to terminal equipment inside.

Description

Antenna structure, control method of antenna structure and terminal equipment

Technical Field

The present disclosure relates to the field of electronic product technologies, and in particular, to an antenna structure, a control method of the antenna structure, and a terminal device.

Background

With the development of communication technology, the demand of 5G terminal equipment is gradually increased, and the 5G terminal equipment needs to meet the requirement of MIMO (Multiple-Input Multiple-Output) technology, that is, Multiple transmission and Multiple reception are realized through Multiple antennas. Under the condition that the size and the appearance of the terminal equipment are not obviously changed, all functions of the terminal equipment are gradually optimized, all functional elements are required to be reasonably arranged, the installation space reserved for the antenna is limited, and the installation space of the antenna in the terminal equipment is obviously insufficient along with the increase of the requirement of the number of the antennas.

Disclosure of Invention

In order to overcome the problems in the related art, the present disclosure provides an antenna structure, a control method of the antenna structure, and a terminal device.

According to a first aspect of the embodiments of the present disclosure, an antenna structure is provided, which is applied to a terminal device, a metal structure is disposed on a housing of the terminal device, the antenna structure at least includes a feeding branch, and the feeding branch is electrically connected to the metal structure and a control chip of the terminal device respectively;

when the control chip of the terminal equipment needs to send or receive signals, the metal structure forms a signal radiation part of the antenna structure so as to receive or send the signals.

Optionally, the antenna structure further includes at least one grounding branch, and the grounding branch is electrically connected to the metal structure and a grounding point of a control chip of the terminal device.

Optionally, each of the ground branches is provided with a control switch, and the control switch controls on/off between the metal structure and a ground point of a control chip of the terminal device.

Optionally, the control switch comprises an active switch.

Optionally, a feed connection point and at least one ground connection point are provided on the metal structure, the feed branches are electrically connected to the metal structure through the feed connection point, and each ground branch is connected to the metal structure through the ground connection point corresponding to the ground branch.

Optionally, the ground branch includes a first ground branch, the first ground branch is connected to the metal structure through a first ground connection point corresponding to the first ground branch, and when the first ground connection point and the feed connection point are located on the same side along a preset direction of the metal structure, the signal radiation portion receives or transmits the signal through a second preset antenna structure.

Optionally, the longer the length of a straight line segment connecting between the first ground connection point and the feed connection point is, the shorter the wavelength of the signal received or transmitted by the signal radiation part is.

Optionally, the ground branch includes a second ground branch, the second ground branch is connected to the metal structure through a second ground connection point corresponding to the second ground branch, and when the second ground connection point and the feed connection point are respectively located at two sides along a preset direction of the metal structure, the signal radiation portion receives or transmits the signal through a third preset antenna structure.

Optionally, when the antenna structure has a plurality of the ground branches, at most one of the ground branches connects a ground point of a metal structure and a control chip of the terminal device at a time.

Optionally, the metal structure comprises a metal decoration for decorating the camera.

According to a second aspect of the embodiments of the present disclosure, there is provided a control method of an antenna structure, applied to the antenna structure as described above, the control method including:

acquiring frequency band information of a signal to be transmitted or received by a control chip of terminal equipment;

and when the frequency band information is a low-frequency band, the control chip is electrically connected with the metal structure through the feed branch.

Optionally, the control method further includes:

when the frequency band information is an intermediate frequency band, the control chip is electrically connected with the metal structure through the feed branch, and an electric connection path between the grounding point of the control chip and the first grounding connection point of the metal structure is communicated;

the electrical connection path between the ground point of the control chip and the second ground connection point of the metal structure is disconnected.

Optionally, the control method further includes:

when the frequency band information is a high-frequency band, the control chip is electrically connected with the metal structure through the feed branch, and an electric connection path between the grounding point of the control chip and the first grounding connection point of the metal structure is disconnected;

and the electric connection path between the ground point of the control chip and the second ground connection point of the metal structure is communicated.

According to a third aspect of the embodiments of the present disclosure, a terminal device is provided, where a metal structure is disposed on a housing of the terminal device, the terminal device further includes a control chip, and the terminal device further includes any one of the above antenna structures.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: this disclosed antenna structure utilizes original metal construction on the terminal equipment casing as signal radiation portion to receive or send signal, reduce the antenna quantity that sets up in the terminal equipment, conveniently carry out the overall arrangement to terminal equipment inside.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

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

Fig. 1 is a schematic diagram of an antenna structure shown in accordance with an exemplary embodiment.

Fig. 2 is a schematic diagram of an antenna structure shown in accordance with another exemplary embodiment.

Fig. 3 is a circuit connection diagram illustrating an antenna structure according to an example embodiment.

Fig. 4 is a circuit connection schematic diagram of an antenna structure shown in accordance with another exemplary embodiment.

Fig. 5 is a circuit connection schematic diagram of an antenna structure shown in accordance with another exemplary embodiment.

Fig. 6 is a partial schematic diagram of a terminal device shown in accordance with an example embodiment.

Fig. 7 is a flowchart illustrating an antenna structure control method according to an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

In the related technology, each function of the terminal equipment is gradually optimized, each functional element needs to be reasonably arranged, meanwhile, with the development of a 5G communication network, the 5G terminal equipment needs to meet the requirement of an MIMO technology, the requirement on the number of antennas is multiplied, and under the condition that the size and the shape of the terminal equipment are not obviously changed, the space for arranging the antennas inside is limited, and the installation requirement of a plurality of antennas cannot be met.

The utility model provides an antenna structure, which is applied to terminal equipment.A metal structure is arranged on a shell of the terminal equipment, the antenna structure at least comprises a feed branch, and the feed branch is respectively and electrically connected with the metal structure and a control chip of the terminal equipment; when the control chip of the terminal equipment needs to send or receive signals, the metal structure forms a signal radiation part of the antenna structure so as to receive or send the signals. This disclosed antenna structure utilizes original metal construction on the terminal equipment casing as signal radiation portion to receive or send signal, reduce the antenna quantity that sets up in the terminal equipment, conveniently carry out the overall arrangement to terminal equipment inside.

In an exemplary embodiment, as shown in fig. 1, the present embodiment discloses an antenna structure applied in a terminal device, where the terminal device may be a portable electronic device such as a notebook computer, a mobile phone, a tablet computer, and the like, and the terminal device may communicate using a 5G technology. The housing 1 of the terminal device is provided with a metal structure 103, wherein the metal structure 103 may be, for example, a local metal region on the housing 1, or may be a metal part protruding from an inner surface of the housing 1 and provided on the housing 1, and the metal structure 103 may be a structure in the housing 1 and cooperate with the housing 1 to support, or perform a decoration function on the housing 1 or the terminal device. The metal structure 103 may originally be a part of the housing, or may be a structure newly added to form an antenna structure. In this embodiment, the specific metal material of the metal structure 103 is not limited, and may be copper, iron, aluminum, etc., as long as the metal structure 103 is ensured to have conductivity, and a signal radiation portion can be formed to perform signal receiving or transmitting.

In this embodiment, as shown in fig. 1, the antenna structure 104 at least includes a feeding branch 11, and the feeding branch 11 is electrically connected to the metal structure 103 and the control chip 102 of the terminal device, respectively. When the control chip 102 of the terminal device needs to transmit or receive signals, the metal structure 103 forms a signal radiation portion of the antenna structure 104 to receive or transmit signals. For example, when the control chip 102 of the terminal device needs to send or receive a signal, the control chip 102 may control whether to transmit a signal to the metal structure 103 through the feeding branch 11, and when the control chip 102 feeds the metal structure 103, the metal structure 103 may serve as a signal radiation portion to receive or transmit a signal. When the control chip 102 does not feed the metal structure 103, the metal structure 103 may be used as, for example, a decoration.

In this embodiment, the metal structure 103 originally disposed on the housing is used as a signal radiation portion of the antenna structure, and when the control chip 102 feeds power to the metal structure 103 through the feeding branch 11, the metal structure 103 receives or transmits signals, so that the number of antennas disposed inside the terminal device can be reduced, the occupation of the antennas on the internal space of the terminal device is reduced, and the layout performance inside the terminal device is better.

As shown in fig. 1, the feeding branch 11 of the antenna structure 104 is connected to the control chip 102 and the metal structure 103, and the metal structure 103 forms a signal radiation portion of the antenna structure 104, and when only the feeding branch 11 is connected to the control chip 102 and the metal structure 103, the metal structure 103 may be equivalent to a first predetermined antenna structure to receive or transmit signals in a frequency band corresponding to the first predetermined antenna structure. At this time, the antenna structure 104 may be equivalent to a signal radiation portion of a MONOPOLE circuit model, that is, the first predetermined antenna structure is a MONOPOLE antenna of the MONOPOLE circuit model. The monopole antenna replaces one arm of the dipole antenna with a grounding structure, and can obtain the effect similar to the dipole antenna according to the mirror image principle of electromagnetic waves. In this embodiment, the body of the terminal device may be regarded as a ground structure, and in order to ensure the reliability of signal transmission, the size of the terminal device is greater than or equal to a quarter wavelength of the minimum frequency of the antenna, so as to ensure that the antenna structure 104 generates resonance at a corresponding frequency point. In this embodiment, when the metal structure 103 forms the signal radiation portion of the first predetermined antenna structure, the wavelength of the received or transmitted signal is longer, and the antenna can be used as an antenna in a low frequency band.

In another exemplary embodiment, as shown in fig. 2, the antenna structure 104 includes a feeding branch 21 and at least one grounding branch 22, and the grounding branch 22 electrically connects the metal structure 103 and the grounding point of the control chip 102 of the terminal device. In this embodiment, one grounding branch 22 may be included, or a plurality of grounding branches 22 may be included, where the number of the grounding branches 22 is set according to actual requirements. When the number of the grounding branches 22 is multiple, the frequency band of the frequency at which the antenna structure 104 receives or transmits signals can be adjusted by selecting different grounding branches 22 to connect the metal structure 103 and the grounding points of the control chip of the terminal device.

In one example, still referring to fig. 2, in this example, a grounding branch 22 is provided, the metal structure 103 is connected to a grounding point on the control chip 102 through the grounding branch 22, the metal structure 103 is further connected to a feeding point on the control chip 102 through the feeding branch 21, and the control chip 102 can control the connection and disconnection of the grounding branch 22 and the feeding branch. When the control chip 102 is electrically connected to the metal structure 103 through the feeding branch 21 and the grounding branch 22, respectively, the metal structure 103 serves as a signal radiation portion of the antenna structure 104, and receives or transmits signals through a second predetermined antenna structure. In this case, the metal structure 103 may be equivalent to a signal radiation portion of the IFA circuit model, and receives or transmits signals in a signal frequency band corresponding to the IFA circuit model. In this example, the metal structure 103 is used as a signal radiation portion under the second predetermined antenna structure, and the received or transmitted signal has a moderate wavelength (but less than the wavelength corresponding to the first predetermined antenna structure), and can be used as an antenna in the intermediate frequency band.

In another example, two or more grounding branches may be provided, and when two or more grounding branches are provided, different grounding branches may be selected to connect the grounding points of the metal structure and the control chip according to the requirements of different frequency bands of the antenna structure in practical situations.

In this embodiment, when there are multiple ground branches, different ground branches can be selected to connect the control chip 102 and the metal structure 103 by controlling the on/off of the multiple ground branches. For example, whether to perform signal transmission with the grounding branch 22 may be controlled by the control chip 102 of the terminal device to connect the metal structure 103 and the grounding point of the control chip 102. For another example, each ground branch may be provided with a control switch, and the control switch may be an active switch. The control switch may be controlled by a control chip, and in a closed state of the control switch, the metal structure 103 is electrically connected to the control chip 102 of the terminal device through the grounding branch. When the control switch is in an off state, the grounding branch corresponding to the control switch is disconnected.

In another exemplary embodiment, as shown in fig. 3, in this example, the antenna structure 104 includes a feeding branch 21 and a grounding branch 32, and a control switch 33 is disposed on the grounding branch 32, and when the control switch 33 is in an off state, the grounding branch 32 is off, and only the feeding branch 31 is on at this time, and the antenna structure 104 with the metal structure 103 as a signal radiation portion constitutes a first predetermined antenna structure, which can be used as a low-frequency band antenna. When the control switch 33 is closed, the grounding branch 32 is connected, the feeding branch 31 is connected, and the metal structure 103 serves as a signal radiation portion of the antenna structure 104 to form a second predetermined antenna structure, which can be used as an if antenna. In this example, the open or close of the control switch is adjusted to adjust the open or close of the ground branch 32, and the frequency band of the metal structure as the radiation part of the antenna structure for receiving or transmitting signals is adjusted.

In another exemplary embodiment, as shown in fig. 4, the antenna structure 104 in this example includes a feeding branch 21 and two grounding branches, and a control switch is correspondingly disposed on each grounding branch, and in this example, according to the requirement on the antenna frequency, any one grounding branch is controlled to connect the metal structure 103 and the control chip 102. In one example, the grounding branches are a first grounding branch 42 and a second grounding branch 43, respectively, and the corresponding control switches are a first control switch 44 and a second control switch 45, respectively. When the first control switch 44 and the second control switch 45 are both turned off, the first grounding branch 42 and the second grounding branch 43 are both turned off, and only the feeding branch 41 is turned on, so that the metal structure 103 is used as the first predetermined antenna structure of the signal radiation portion, and can be used as a low frequency band antenna.

In another example, when the first control switch 44 is closed and the second control switch 45 is opened, the first ground branch 42 is connected, the second ground branch 43 is disconnected, and the feeding branch 41 is connected, the antenna structure 104 with the metal structure 103 as the signal radiation portion constitutes a second predetermined antenna structure, which can be used as an if band antenna.

In another example, when the first control switch 44 is turned off and the second control switch 45 is turned on, the first ground branch 42 is turned off, the second ground branch 43 is turned on, and the feeding branch 41 is turned on, the antenna structure 104 with the metal structure 103 as the signal radiation portion forms a third predetermined antenna structure, and the antenna structure 104 may be equivalent to an antenna form of a LOOP circuit model. The metal structure 103 under the third predetermined antenna structure serves as a signal radiation portion, and the received or transmitted signal has a shorter wavelength (smaller than the wavelength of the antenna structures 104 in the first and second predetermined antenna structures), and can be used as an antenna in a high frequency band. By controlling the on-off of the control switch, different grounding branches can be selected to be connected with the grounding points of the connecting metal structure and the control chip, so as to adjust the equivalent antenna model of the antenna structure 104, and further realize the functions of receiving and transmitting signals of different frequency bands.

Here, it should be noted that, in the present embodiment, although a plurality of grounding branches are provided, the plurality of branches cannot simultaneously communicate the metal structure and the control chip, and at most one grounding branch connects the metal structure to the grounding point of the control chip of the terminal device.

In another exemplary embodiment, as shown in fig. 2 to 6, a feeding connection point 100 and at least one ground connection point 200 are provided on the metal structure 103, the feeding branches are electrically connected to the metal structure 103 through the feeding connection point 100, and each ground branch is connected to the metal structure 103 through the ground connection point 200 corresponding to the ground branch. The feeding connection point 100 and the grounding connection point 200 may be integrally formed with the metal structure 103, or may be metal bumps disposed on the metal structure 103. The specific number of the ground connection points 200 may be set according to the requirement for adjusting the frequency band of the antenna, for example, the ground connection point 200 is set as one, as shown in fig. 2 or fig. 3, and the ground branch is connected to the metal structure 103 through the ground connection point 200.

In another exemplary embodiment, for example, as shown in fig. 4, the ground branch includes a second ground branch 43, the second ground branch 43 is connected to the metal structure 103 through a second ground connection point 200 corresponding to the second ground branch 43, and when the second ground connection point 200 and the feed connection point 100 are located at two sides along the predetermined direction of the metal structure 103 and the second ground branch 43 is in the on state, the signal radiation portion receives or transmits a signal with a third predetermined antenna structure. The third preset antenna structure is equivalent to an antenna form of an LOOP circuit model and can be used as an antenna of a high-frequency band.

In another exemplary embodiment of the present disclosure, as shown in fig. 2, the ground branch includes a first ground branch 22, the first ground branch 22 is connected to the metal structure 103 through a first ground connection point 200 corresponding to the first ground branch 22, and when the first ground connection point 200 and the feed connection point 100 are located on the same side along a predetermined direction of the metal structure 103 (e.g., a width direction of the metal structure 103), the signal radiation portion receives or transmits a signal of an intermediate frequency band with a second predetermined antenna structure (equivalent to an antenna form of an IFA circuit model).

In an example of the present embodiment, as shown in fig. 5, the antenna structure 104 includes a plurality of ground branches, for example, the ground branches are a first ground branch 51, a second ground branch 52, and a third ground branch 53, respectively. Control switches, such as a first control switch 54, a second control switch 55 and a third control switch 56, are correspondingly disposed on each ground branch. The metal structure 103 is provided with a plurality of ground connection points, such as a first ground connection point 57, a second ground connection point 58, and a third ground connection point 59, and a plurality of ground branches are provided corresponding to the plurality of ground connection points. When the ground connection point and the feed connection point are located on the same side along the preset direction of the metal structure 103, the lengths of straight line segments of connection lines between the plurality of ground connection points and the feed connection point are different, one of the plurality of ground branches is electrically connected with the metal structure 103 through the corresponding ground connection point, and the signal radiation portion receives or transmits signals with corresponding wavelengths. In this embodiment, the longer the length of the straight line segment of the connection line between the first ground connection point 200 and the feed connection point 100, the shorter the wavelength of the signal received or transmitted by the signal radiation portion.

In another example of this embodiment, still referring to fig. 5, when the first control switch 54, the second control switch 55 and the third control switch 56 are all turned off and only the feeding branch 50 is turned on, the antenna structure 104 with the metal structure 103 as the signal radiation portion constitutes a first predetermined antenna structure, and the wavelength of the signal received or transmitted by the signal radiation portion is longer and can be used as a low frequency band antenna.

In another example, when the first control switch 54 is closed, the second control switch 55 and the third control switch 56 are opened, the first ground branch 51 and the feeding branch 50 are connected, and the antenna structure 104 with the metal structure 103 as the signal radiation portion constitutes a second predetermined antenna structure, and the wavelength of the signal received or transmitted by the signal radiation portion is moderate, and the antenna can be used as an intermediate frequency band antenna.

In another example, when the second control switch 55 is closed, the first control switch 54 and the third control switch 56 are opened, the second ground branch 52 and the feeding branch 50 are connected, and the antenna structure 104 with the metal structure 103 as the signal radiation portion constitutes a third predetermined antenna structure, and the signal received or transmitted by the signal radiation portion has a shorter wavelength and can be used as a high-band antenna.

In another example, when the third control switch 56 is closed, the first control switch 54 and the second control switch 55 are opened, the third ground branch 53 and the feeding branch 50 are closed, and the antenna structure 104 with the metal structure 103 as the signal radiation portion constitutes a fourth predetermined antenna structure, and the wavelength and frequency band of the signal received or transmitted by the signal radiation portion are located between the second predetermined antenna structure and the third predetermined antenna structure.

In this example, the length of the straight line segment of the line connecting the third ground connection point 59 to the feed connection point 100 is greater than the length of the straight line segment of the line connecting the first ground connection point 57 to the feed connection point 100. When the grounding branch branches corresponding to the grounding connection points are independently communicated, the wavelengths of signals received or transmitted by the signal radiation parts under the antenna structures corresponding to the grounding connection points satisfy the following conditions: the wavelength of the signal received or transmitted by the signal radiation part under the fourth preset antenna structure is greater than the wavelength of the signal received or transmitted by the signal radiation part under the third preset antenna structure. The frequency of the signal received or transmitted by the signal radiation part under the corresponding antenna structure satisfies the following conditions: the frequency of the signal received or transmitted by the signal radiation part under the fourth preset antenna structure is less than that of the signal received or transmitted by the signal radiation part in the third preset antenna structure.

In the related art, as the requirement for the terminal device to take a picture is increased, the number of the cameras 101 of the terminal device is gradually increased, from single-shot to double-shot, to three-shot, four-shot, and so on, and thus the influence is that the space area occupied by the cameras 101 by the terminal device is increasingly large, and in combination with this feature, according to another exemplary embodiment of the present disclosure, the metal structure 103 includes a metal decoration (metal DECO) for decorating the cameras 101. As shown in fig. 6, the external surface of the camera 101 in this example can play a role of fixing and decorating the camera 101 through the metal structure 103. At this time, the metal structure 103 may protrude from the outer surface of the housing 1, so that the metal structure 103 may be used as a signal radiation portion to better transmit and receive signals. In this example, it can be seen that the metal structure 103 can be used as an antenna radiation portion, and a ground branch is combined to perform multi-band tuning on the antenna; the camera 101 can be decorated or fixed by using the metal structure 103, the original structure of the terminal equipment is reused, and the space in the terminal equipment can be effectively saved.

In another exemplary embodiment, the plurality of cameras 101 of the terminal device are arranged according to a preset shape, and the metal structure 103 encloses the preset shape. For example, as shown in fig. 6, in an exemplary embodiment, the plurality of cameras 10161 are arranged along the length direction of the terminal device, that is, the plurality of cameras 101 are arranged in a strip or rectangle, and the metal structure 103 is also arranged in a strip or rectangle, in which case the ground connection point 200 and the feed connection point 100 may be arranged along the edge of the strip or rectangle metal structure 103. In other examples, the plurality of cameras 101 may also be arranged in a square or circle, the metal structure 103 encloses a square or circle, and the ground connection point 200 and the feed connection point 100 are disposed at the edge of the square or circle metal structure 103. In this embodiment, when the frequency band of the signal received or transmitted by the signal radiation portion of the antenna structure is adjusted, the longer the length of the straight line segment of the connection line between the ground connection point 200 and the feed connection point 100, the shorter the wavelength of the signal received or transmitted by the signal radiation portion.

In another exemplary embodiment, a control method of an antenna structure is provided, which is applied to the above-mentioned antenna structure, and adjusts a frequency band of the antenna structure, as shown in fig. 7, the control method includes:

step S710, obtaining frequency band information of a signal to be transmitted or received by a control chip of the terminal device.

In this embodiment, the frequency band information of the signal to be transmitted or received by the control chip of the terminal device may be selected based on the actual usage scenario of the terminal device, for example, a low-frequency band signal is required in the navigation process, an intermediate-frequency band signal is required in the amplitude modulation broadcasting process, and a high-frequency band signal is required in the mobile wireless phone.

Step S720, determining the frequency band information as a low frequency band, a medium frequency band or a high frequency band.

And step S730, when the frequency band information is a low-frequency band, electrically connecting the control chip with the metal structure through the feed branch.

In this embodiment, the antenna structure includes a feeding branch, as shown in fig. 1, the feeding branch 11 of the antenna structure 104 is connected to the control chip 102 and the metal structure 103, at this time, the antenna structure 104 using the metal structure 103 as a signal radiation portion forms a first predetermined antenna structure, and the antenna structure 104 may be equivalent to an antenna form of a MONOPOLE circuit model, and receives or transmits a signal in a low frequency band.

And step S740, when the frequency band information is the intermediate frequency band, the control chip is electrically connected with the metal structure through the feed branch, and an electric connection path between the grounding point of the control chip and the first grounding connection point of the metal structure is communicated. The electrical connection path between the ground point of the control chip and the second ground connection point of the metal structure is disconnected.

In this embodiment, the antenna structure includes a feeding branch and a plurality of grounding branches, and the metal structure 103 is provided with a feeding point corresponding to the feeding branch and a grounding connection point corresponding to the grounding branch. Referring to fig. 4, the control chip is electrically connected to the metal structure 103 through the feeding branch 41, when the required frequency band information is the intermediate frequency band, the electrical connection path (i.e., the first grounding branch 42) between the grounding point of the control chip and the first grounding connection point of the metal structure 103 is connected, and the electrical connection path (i.e., the second grounding branch 43) between the grounding point of the control chip and the second grounding connection point of the metal structure 103 is disconnected, at this time, the antenna structure 104 using the metal structure 103 as the signal radiation portion forms a second predetermined antenna structure, and the antenna structure 104 may be equivalent to an antenna form of an IFA circuit model to receive or transmit signals in the intermediate frequency band.

And S750, when the frequency band information is a high-frequency band, electrically connecting the control chip with the metal structure through the feed branch, and disconnecting an electric connection path between the grounding point of the control chip and the first grounding connection point of the metal structure. And the electric connection path between the ground point of the control chip and the second ground connection point of the metal structure is communicated.

Still referring to fig. 4, in this embodiment, the control chip is electrically connected to the metal structure 103 through the feeding branch 41, when the required frequency band information is a high frequency band, the electrical connection path (i.e., the first grounding branch 42) between the grounding point of the control chip and the first grounding connection point of the metal structure 103 is disconnected, and the electrical connection path (i.e., the second grounding branch 43) between the grounding point of the control chip and the second grounding connection point of the metal structure 103 is connected, at this time, the antenna structure 104 using the metal structure 103 as a signal radiation portion forms a third predetermined antenna structure, and the antenna structure 104 can be equivalent to an antenna form of a LOOP circuit model to receive or transmit signals in the high frequency band.

The present disclosure further provides a terminal device, as shown in fig. 1, a metal structure 103 is disposed on a housing 1 of the terminal device, the terminal device further includes a control chip 102, and the terminal device further includes the antenna structure 104.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (14)

1. An antenna structure is applied to terminal equipment, and a metal structure is arranged on a shell of the terminal equipment;

when the control chip of the terminal equipment needs to send or receive signals, the metal structure forms a signal radiation part of the antenna structure so as to receive or send the signals.

2. The antenna structure according to claim 1, characterized in that it further comprises at least one grounding branch electrically connecting the metallic structure and a grounding point of a control chip of the terminal device.

3. The antenna structure according to claim 2, characterized in that a control switch is arranged on each of the ground branches, said control switch controlling the switching between the metallic structure and the ground point of the control chip of the terminal device.

4. The antenna structure according to claim 3, characterized in that the control switch comprises an active switch.

5. An antenna structure according to claim 2, characterized in that a feed connection point and at least one ground connection point are provided on the metallic structure, said feed branches being electrically connected to the metallic structure via said feed connection point, each of said ground branches being connected to the metallic structure via said ground connection point corresponding thereto.

6. The antenna structure according to claim 5, wherein the ground branch comprises a first ground branch, the first ground branch is connected to the metal structure through a first ground connection point corresponding to the first ground branch, and when the first ground connection point and the feed connection point are located on the same side along a predetermined direction of the metal structure, the signal radiation portion receives or transmits the signal with a second predetermined antenna structure.

7. The antenna structure according to claim 6, wherein the longer the length of the straight line segment connecting between the first ground connection point and the feed connection point, the shorter the wavelength of the signal received or transmitted by the signal radiating section.

8. The antenna structure according to claim 5, wherein the ground branch comprises a second ground branch, the second ground branch is connected to the metal structure through a second ground connection point corresponding to the second ground branch, and when the second ground connection point and the feed connection point are respectively located at two sides along a predetermined direction of the metal structure, the signal radiation portion receives or transmits the signal with a third predetermined antenna structure.

9. The antenna structure according to claim 2, characterized in that when the antenna structure has a plurality of said ground branches, at most one of said ground branches switches on a ground point of a metal structure with a control chip of said terminal device at a time.

10. An antenna structure according to any one of claims 1 to 9, wherein the metal structure comprises a metal trim piece for decorating the camera head.

11. A control method of an antenna structure, applied to the antenna structure according to any one of claims 1 to 10, characterized in that the control method comprises:

acquiring frequency band information of a signal to be transmitted or received by a control chip of terminal equipment;

and when the frequency band information is a low-frequency band, the control chip is electrically connected with the metal structure through the feed branch.

12. The control method according to claim 11, characterized by further comprising:

when the frequency band information is an intermediate frequency band, the control chip is electrically connected with the metal structure through the feed branch, and an electric connection path between the grounding point of the control chip and the first grounding connection point of the metal structure is communicated;

the electrical connection path between the ground point of the control chip and the second ground connection point of the metal structure is disconnected.

13. The control method according to claim 11, characterized by further comprising:

when the frequency band information is a high-frequency band, the control chip is electrically connected with the metal structure through the feed branch, and an electric connection path between the grounding point of the control chip and the first grounding connection point of the metal structure is disconnected;

and the electric connection path between the ground point of the control chip and the second ground connection point of the metal structure is communicated.

14. A terminal device, a metal structure being arranged on a housing of the terminal device, the terminal device further comprising a control chip, characterized in that the terminal device further comprises an antenna structure according to any one of claims 1-10.

Images