CN115275572A

CN115275572A - Antenna structure and electronic device

Info

Publication number: CN115275572A
Application number: CN202110476666.4A
Authority: CN
Inventors: 罗正; 董翔宇; 穆梦甜
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2022-11-01

Abstract

The present disclosure relates to an antenna structure and an electronic device. The antenna structure comprises a feed point; the metal frame body comprises a body, a first radiator and a second radiator, the first radiator and the second radiator are both connected with the body, the first radiator and the second radiator are both electrically connected to the feed point, and the polarization direction of the first radiator is perpendicular to that of the second radiator; and the phase shifting unit is connected between the first radiating body and the feed point or between the second radiating body and the feed point, and is used for forming a phase difference of 90 degrees between the first radiating body and the second radiating body.

Description

Antenna structure and electronic device

Technical Field

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

Background

At present, with the continuous powerful of various configuration functions of electronic equipment, the space inside the electronic equipment is more and more compact, and especially for the configuration antenna structure of the electronic equipment, how to arrange the antenna in a limited space and ensure the performance of the antenna as far as possible becomes a technical problem to be solved urgently in the field.

Disclosure of Invention

The present disclosure provides an antenna structure and an electronic device to solve the disadvantages of the related art.

According to a first aspect of embodiments of the present disclosure, there is provided an antenna structure, comprising:

feeding points;

the metal frame body comprises a body, a first radiator and a second radiator, the first radiator and the second radiator are both connected with the body, the first radiator and the second radiator are both electrically connected to the feed point, and the polarization direction of the first radiator is perpendicular to that of the second radiator;

and the phase shifting unit is connected between the first radiating body and the feed point or between the second radiating body and the feed point, and is used for forming a phase difference of 90 degrees between the first radiating body and the second radiating body.

Optionally, the first radiator is disposed along a first direction of the body, the second radiator is disposed along a second direction of the body, and the first direction is perpendicular to the second direction.

Optionally, the first radiator and the second radiator are disposed near the same corner region of the body.

Optionally, when the body is parallel to the reference plane, the polarization direction of the first radiator is parallel to the reference plane, the polarization direction of the second radiator is perpendicular to the reference plane, and the phase of the first radiator lags behind the phase of the second radiator by 90 °.

Optionally, the metal frame further includes a third radiator and a fourth radiator, the fourth radiator is connected to the body, the third radiator is located between the fourth radiator and the first radiator, and the fourth radiator and the first radiator are respectively matched to form an antenna slot.

Optionally, the method further includes:

and the first matching circuit is connected between the feed point and the first radiator.

Optionally, the method further includes:

and the second matching circuit is connected between the feed point and the second radiator.

Optionally, the antenna structure comprises a GPS antenna structure.

Optionally, the phase shift unit includes a phase shifter or a microstrip phase shift unit.

According to a second aspect of embodiments of the present disclosure, there is provided an electronic device comprising an antenna structure as described in any one of the embodiments above.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

according to the embodiments, the circular polarization antenna is constructed by the first radiator and the second radiator which are linearly polarized, so that the problem that in the related art, due to the fact that the internal space of equipment configured with the antenna structure is limited, only the linear polarization antenna can be constructed, power loss is caused by mismatch when circularly polarized electromagnetic waves are received, and the antenna performance is affected can be solved.

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 present disclosure and together with the description, serve to explain the principles of the disclosure.

Fig. 1 is a schematic diagram illustrating an antenna structure according to an exemplary embodiment.

Fig. 2 is a schematic structural diagram of an electronic device 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 implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if," as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination," depending on the context.

Fig. 1 is a schematic structural diagram illustrating an antenna structure 100 according to an exemplary embodiment, and as shown in fig. 1, the antenna structure 100 may include a metal frame 1, a feed point 2, and a phase shift unit 3. The metal frame 1 may include a body 11, a first radiator 12 and a second radiator 13, wherein the first radiator 12 and the second radiator 13 are both connected to the body 11, and the first radiator 12 and the second radiator 13 may be electrically connected to the feed point 2, respectively. As shown in fig. 1, the phase shift unit 3 may be connected between the first radiator 12 and the feed point 2. The polarization directions of the first radiator 12 and the second radiator 13 can be controlled by controlling the current flow directions of the first radiator 12 and the second radiator 13, for example, the polarization direction of the first radiator 12 can be horizontally polarized, and the polarization direction of the second radiator 13 can be vertically polarized, so that a phase difference of 90 ° can be formed between the first radiator 12 and the second radiator 13 by the phase shifting unit 3 connected between the first radiator 12 and the feed point 2, and thus a circularly polarized antenna can be constructed by the linearly polarized first radiator 12 and the second radiator 13, which can solve the problem in the related art that the antenna structure has a limited internal space, only a linearly polarized antenna can be constructed, and power loss is generated due to mismatch when a circularly polarized electromagnetic wave is received, thereby affecting the antenna performance. The phase shift unit 3 may include a phase shifter or a microstrip phase shift unit, which is not limited by the present disclosure.

For example, the antenna structure 100 may include a GPS antenna, the GPS antenna may perform positioning by receiving electromagnetic wave signals of a plurality of navigation satellites, the electromagnetic wave transmitted by the navigation satellites is usually circularly polarized electromagnetic wave, the GPS antenna limited to the electronic device in the related art is a linearly polarized antenna, and when receiving circularly polarized electromagnetic wave, the linearly polarized antenna has a power loss due to polarization adaptation of about 3dB, and in a weak signal scenario, the positioning function of the device is weakened, and even navigation cannot be performed. In the technical scheme of the present disclosure, a circularly polarized antenna may be configured by the first radiator 12 and the second radiator 13, so that power loss may be reduced, and navigation performance of the electronic device may be improved. In the embodiment shown in fig. 1, only the phase shift unit 3 is connected between the first radiator 12 and the feed point 2 for illustration, in other embodiments, the phase shift unit 3 may also be connected between the second radiator 13 and the feed point 2, and a phase difference of 90 ° may also be generated between the first radiator 12 and the second radiator 13, so as to construct a circular polarization antenna.

In the embodiment shown in fig. 1, the first radiator 12 is disposed along a first direction shown by an arrow a, and the second radiator 13 is disposed along a second direction shown by an arrow B, the first direction and the second direction are perpendicular, so that the relative polarization direction between the first radiator 12 and the second radiator 13 can be constructed by making the physical arrangement direction of the first radiator 12 and the second radiator 13 perpendicular, for example, the first radiator 12 can be horizontally polarized and the second radiator 13 can be vertically polarized, or the first radiator 12 can be vertically polarized and the second radiator 13 can be horizontally polarized.

Taking the antenna structure 100 and the electronic device 200 shown in fig. 2 as an example, the metal frame 1 may be a middle frame of the electronic device 200, the first direction may be a width direction of the electronic device 200, and the second direction may be a length direction of the electronic device 200, and in order to achieve that the first radiator 12 and the second radiator 13 are perpendicular in a physical direction, the first radiator 12 may be disposed along the width direction of the electronic device 200, and the second radiator 13 is disposed along the length direction of the electronic device 200, that is, the first radiator 12 and the second radiator 13 are located at a set of adjacent edges of the middle frame. Further, in order to simplify the internal circuit of the antenna structure 100, the first radiator 12 and the second radiator 13 may be close to the same corner region of the body 11, for example, as shown in fig. 1, the first radiator 12 and the second radiator 13 may be close to the upper left corner region of the body 11, so as to shorten the line length of the feed point 2 connected to the first radiator 12 and the second radiator 13, and simplify the internal circuit layout.

With the horizontal plane of the ground as the reference plane, since the electronic device configured with the GPS antenna structure is usually in a flat state, i.e., parallel to the reference plane, when used for navigation, and the electromagnetic waves emitted by the navigation satellite are usually right-handed electromagnetic waves, when the circularly polarized antenna constructed by the first radiator 12 and the second radiator 13 is a right-handed circularly polarized antenna, the power loss can be minimized. Therefore, in a state where the body 11 is parallel to the reference plane, the first radiator 12 may be a horizontally polarized antenna, and the second radiator 13 may be a vertically polarized antenna, and the phase of the first radiator 12 is 90 ° later than the phase of the second radiator 13, so that the right-hand circularly polarized antenna may be constructed in a state where the electronic device is laid flat, and the antenna performance may be improved.

In order to implement impedance matching of the antenna structure 100, the antenna structure 100 may further include a first matching circuit 4 and a second matching circuit 5, where the first matching circuit 4 is connected between the feed point 2 and the first radiator 12, and the second matching circuit 5 is connected between the feed point 2 and the second radiator 13, so as to perform impedance matching on the antenna structure 10, thereby improving antenna performance of the antenna structure 100. Further, in order to meet the mobile communication requirements of the electronic device 200, such as the 4G communication requirements and the 5G communication requirements of the electronic device 200, the metal frame 1 may further include a third radiator 14 and a fourth radiator 15, the fourth radiator 15 may be connected to the body 11, the third radiator 14 is located between the first radiator 12 and the fourth radiator 15, and the third radiator 14 may cooperate with the first radiator 12 and the fourth radiator 15 to form an antenna gap, respectively, so that the antenna structure 100 may radiate electromagnetic waves to the outside. The third radiator 14 may be connected to another feed point on the motherboard of the electronic device 200, and the fourth radiator 15 may serve as a coupling stub to couple with the third radiator 14 to realize radiation of antenna signals in a corresponding frequency band.

The electronic device 200 may include a mobile phone terminal, a tablet terminal, or a wearable device, which is not limited by the present disclosure.

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

It will be understood that the present disclosure 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 present disclosure is limited only by the appended claims.

Claims

1. An antenna structure, comprising:

feeding points;

2. The antenna structure of claim 1, wherein the first radiator is disposed along a first direction of the body, wherein the second radiator is disposed along a second direction of the body, and wherein the first direction is perpendicular to the second direction.

3. The antenna structure of claim 2, wherein the first radiator and the second radiator are disposed proximate a same corner region of the body.

4. The antenna structure of claim 2, wherein when the body is parallel to a reference plane, a polarization direction of the first radiator is parallel to the reference plane, a polarization direction of the second radiator is perpendicular to the reference plane, and a phase of the first radiator lags a phase of the second radiator by 90 °.

5. The antenna structure of claim 1, wherein the metal frame further comprises a third radiator and a fourth radiator, the fourth radiator is connected to the body, the third radiator is located between the fourth radiator and the first radiator, and the third radiator and the fourth radiator and the first radiator cooperate to form an antenna slot, respectively.

6. The antenna structure according to claim 1, further comprising:

7. The antenna structure according to claim 1, further comprising:

8. The antenna structure of claim 1, wherein the antenna structure comprises a GPS antenna structure.

9. The antenna structure according to claim 1, characterized in that the phase shifting elements comprise phase shifters or microstrip phase shifting elements.

10. An electronic device, characterized in that it comprises an antenna structure according to any of claims 1-9.