CN107394358B

CN107394358B - Antenna structure and electronic device

Info

Publication number: CN107394358B
Application number: CN201610326311.6A
Authority: CN
Inventors: 薛宗林; 王霖川; 熊晓峰
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2016-05-17
Filing date: 2016-05-17
Publication date: 2020-07-31
Anticipated expiration: 2036-05-17
Also published as: CN107394358A

Abstract

The present disclosure relates to an antenna structure and an electronic device, wherein the antenna structure is applied to an electronic device having a conductive frame, and two broken seams for realizing signal radiation of the antenna structure are arranged on the conductive frame; the antenna structure includes: an IFA antenna assembly, the IFA antenna assembly being located near a first conductive frame section formed on the conductive bezel by the two break seams, and a feed point and a first ground point of the IFA antenna assembly being electrically connected to the first conductive frame section, respectively; wherein the IFA antenna assembly is relatively close to a first broken seam of the two broken seams, and the feed point is closer to the first broken seam relative to the first grounding point; and a second grounding point located on one side of the IFA antenna component far away from the first broken joint, wherein the second grounding point forms a parasitic branch joint to the second broken joint of the two broken joints so as to be coupled with the first conductive frame section. Through the technical scheme of this disclosure, can realize antenna structure's full frequency channel and cover under the not enough condition of electronic equipment's inner space.

Description

Antenna structure and electronic device

Technical Field

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

Background

With the increasingly wide application of electronic devices such as mobile phones and flat panels in daily life, people are continuously demanding new requirements for the structure and functions of the electronic devices, such as a metal shell requiring smaller device specification, larger screen occupation ratio and better hand feeling.

However, any structural and functional changes of the electronic device may affect the performance of the antenna structure, thereby affecting the most basic communication function of the electronic device and reducing the user experience.

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 the embodiments of the present disclosure, an antenna structure is provided, which is applied to an electronic device having a conductive frame, where two broken seams for implementing signal radiation of the antenna structure are provided on the conductive frame; the antenna structure includes:

an IFA antenna assembly located adjacent to a first conductive frame segment formed on the conductive bezel by the two break lines, the feed point and a first ground point of the IFA antenna assembly being electrically connected to the first conductive frame segment, respectively; wherein the IFA antenna assembly is relatively close to a first of the two break lines and the feed point is closer to the first break line relative to the first ground point;

and a second grounding point located on a side of the IFA antenna assembly away from the first gap, the second grounding point forming a parasitic stub to a second gap of the two gaps to couple to the first conductive frame segment.

Optionally, a setting area of a preset connector in the electronic device is located between the first ground point and the second ground point.

Optionally, the parasitic branch is formed by extending one end of the second grounding point close to the first conductive frame section, bending and extending toward the second broken joint.

Optionally, a side of the parasitic branch section, which is far away from the first conductive frame section, is close to a setting area of a microphone in the electronic device.

Optionally, the method further includes:

a third ground point on a side of the IFA antenna assembly distal from the second break, the third ground point electrically connected to the remaining second conductive frame segment on the conductive bezel.

Optionally, the third ground point is electrically connected to the second conductive frame segment near the end of the first break.

Optionally, one end of the third ground point close to the IFA antenna assembly extends toward the IFA antenna assembly, and then bends and extends to the second conductive frame section.

Optionally, the two broken seams are located on the same side of the conductive frame.

According to a second aspect of the embodiments of the present disclosure, there is provided an electronic apparatus including: an antenna structure as claimed in any preceding embodiment.

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

according to the embodiment, the coverage of the low-frequency band and the high-frequency band can be realized through the IFA antenna assembly; meanwhile, the parasitic branch knot formed by the second grounding point can cover the intermediate frequency band, so that the full-band coverage can be still realized under the condition that the internal space of the electronic equipment is insufficient, and the full-network communication of the electronic equipment is realized.

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 internal device arrangement of an electronic device according to an exemplary embodiment.

Fig. 2 is a schematic diagram illustrating an antenna structure in accordance with one of the exemplary embodiments.

Fig. 3 is a schematic diagram of an antenna structure according to a second 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.

Due to user requirements such as portability, the specification and size of electronic equipment are limited; however, the application functions of the electronic device are more and more abundant, which results in that the internal space of the electronic device is smaller and smaller, and it is difficult to continue to adopt the antenna structure in the related art. As shown in fig. 1, in an exemplary embodiment, a clearance area 10, a motherboard area 20, and the like are formed inside an electronic device, and the antenna structure of the present disclosure is substantially disposed in the clearance area 10; however, since the internal space of the electronic device is limited, the clearance area 10 actually has a projection range corresponding thereto, such as the USB connector 31, the microphone 32, and the like, and thus the actually available space of the antenna structure is limited.

As shown in fig. 1, the electronic device is provided with a conductive bezel 1 made of a metal material, and the top side (or any other side) of the conductive bezel 1 is provided with two broken seams, i.e., a first broken seam 11 and a second broken seam 12, so that an antenna structure in the electronic device can realize signal radiation through the two broken seams, and the two broken seams further divide the conductive bezel 1 into a first conductive frame segment 101 and a remaining second conductive frame segment 102 at a clearance area for generating resonant signals of different frequency bands. Of course, the first broken seam 11 and the second broken seam 12 may also be located at any other positions of the conductive frame 1, which is not limited by the present disclosure; for convenience of description, the following embodiments of the present disclosure are described by taking the first broken seam 11 and the second broken seam 12 shown in fig. 1 as an example.

Fig. 2 is a schematic diagram illustrating an antenna structure according to an exemplary embodiment, which may include, as shown in fig. 2:

an IFA (Inverted-F antenna) antenna assembly 4, the IFA antenna assembly 4 being located adjacent to a first conductive frame section 101 formed by two slits in the conductive border 1, and a feed point F and a first ground point G1 of the IFA antenna assembly 4 being electrically connected to the first conductive frame section 101, respectively; the IFA antenna element 4 is relatively close to the first slot 11, and the feed point F is closer to the first slot 11 than the first ground point G1.

In the present embodiment, by disposing the IFA antenna assembly 4 at the first slit 11 and connecting the feed point F and the first ground point G1 to the first conductive frame segment 101 respectively, a radiation structure "feed point F → the first conductive frame segment 101 → the first ground point G1" is formed, and partial energy output by the feed point F can be radiated, so as to influence the overall antenna structure at the low frequency band of about 700 + 960 MHz. Meanwhile, because the IFA antenna assembly 4 has a large area of the routing (pattern) region 40 connected to the feed point F, the routing region 40 can radiate another part of energy output by the feed point F, so that the formed high-order mode can affect the whole antenna structure at the high-frequency band of about 2300-; the high-frequency band affected by the adjustment of the routing area 40, for example, the control of the extension length of the bottom side of the routing area 40 in the left and right directions, can be fine-tuned, so as to meet the actual design and use requirements.

In the antenna structure of the present disclosure, it may further include: a second ground point G2 on the side of the IFA antenna assembly 4 remote from the first slot 11 (for example, in fig. 2, the second ground point G2 may be on the right side of the IFA antenna assembly 4), the second ground point G2 forming a parasitic branch G20 towards the second slot 12 for coupling to the first conductive frame section 101.

In this embodiment, the parasitic branch G20 is formed by the second grounding point G2, so that when the parasitic branch G20 is coupled with the first conductive frame section 101, the overall antenna structure can be affected to the intermediate frequency band of about 1710-2170MHz, and the antenna structure of the present application can realize full-band coverage of 700-2700MHz under the effect of the parasitic branch G20 and other structures formed by the IFA antenna assembly 4 and the second grounding point G2.

In this embodiment, the second conductive frame segment 102 may be divided into one side frame segment 102A and the other side frame segment 102B according to the arrangement position; in the embodiment shown in fig. 2, the one side frame segment 102A is a left side frame segment and the other side frame segment 102B, and for convenience of description, the left side frame segment 102A and the right side frame segment 102B are described below. Since the IFA antenna assembly 4 occupies the area of the first conductive frame section 101 near the first gap 11, when the second grounding point G2 is disposed on the right side of the IFA antenna assembly 4, the parasitic branch G20 is coupled with the portion of the first conductive frame section 101 near the second gap 12, so as to avoid using the right frame section 102B, so that the user can reduce the hand-hold amplitude and the head-hand amplitude of the signal during holding the electronic device and talking, etc., as much as possible, thereby maintaining better communication effect.

In the above embodiment, the parasitic branch G20 may extend from the second ground point G2 near one end of the first conductive frame segment 101 to form a first portion G21, may be bent and extend toward the second broken seam 12 to form a second portion G22, and the second portion G22 may be parallel to the first conductive frame segment 101. When the second grounding point G2 is disposed on the side of the IFA antenna assembly 4 away from the first gap 11, the location between the first grounding point G1 and the second grounding point G2 may be the location area of a predetermined connector in the electronic device, for example, the connector may be the USB connector 31 in the embodiment shown in fig. 2; meanwhile, one side (i.e. the lower side of the embodiment shown in fig. 2) of the parasitic branch G20 far from the first conductive frame section 101 may be close to the installation area of the microphone 32 in the electronic device, that is, the second grounding point G2 and the parasitic branch G20 may be formed at the gap between the USB connector 31 and the microphone 32, so that not only the coupling with the first conductive frame section 101 can be realized, but also the space in the electronic device can be fully utilized, and since the second grounding point G2 is not connected or coupled with the right frame section 102B, the microphone 32 can freely adjust the position between the second grounding point G2 and the right frame section 102B, and the antenna performance is not affected or the affected is limited and controllable.

Fig. 3 is a schematic diagram of another antenna structure according to an exemplary embodiment, and as shown in fig. 3, the antenna structure may further include, on the basis of the embodiment shown in fig. 2:

a third ground point G3 on a side of the IFA antenna assembly 4 remote from the second slot 12 is electrically connected to the remaining second conductive frame segment 102 on the conductive bezel 1 at a third ground point G3. Wherein one end of the third ground point G3 adjacent to the IFA antenna assembly 4 (i.e. the right end of the embodiment shown in figure 3) may extend towards the IFA antenna assembly 4 and then bend and extend to the second conductive frame segment 102.

For example, in the embodiment shown in fig. 3, the third grounding point G3 can be connected to the left frame segment 102A, so that a part of the energy from the feeding point F is conducted to the first conductive frame segment 101, then coupled to the second conductive frame segment 102 via the first slit 11, and then conducted to the third grounding point G3, thereby affecting the overall antenna structure at the high frequency band of about 2300-.

The third grounding point G3 is electrically connected to the second conductive frame segment 102 near the end of the first slit 11, so that when a user holds the electronic device or places the electronic device on the head, the left frame segment 102A is less dependent on the user, and therefore, the signal drop caused by holding or holding the electronic device is very limited, and the excessive signal drop caused by holding or holding the electronic device on the head can be effectively avoided or reduced.

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 application 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 is applied to electronic equipment with a conductive frame, and is characterized in that two broken joints for realizing signal radiation of the antenna structure are arranged on the conductive frame; the antenna structure includes:

2. The antenna structure according to claim 1, characterized in that between the first ground point and the second ground point is a placement area for a predetermined connector in the electronic device.

3. The antenna structure of claim 1, wherein the parasitic stub is formed by extending the second ground point from an end of the first conductive frame segment, bending the second ground point, and extending the second ground point toward the second break.

4. The antenna structure of claim 3, wherein a side of the parasitic stub distal from the first conductive frame segment is proximate to a placement area of a microphone in the electronic device.

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

6. The antenna structure of claim 5, wherein the third ground point is electrically connected to the second conductive frame segment near an end of the first break.

7. The antenna structure of claim 5, wherein an end of the third ground point proximate the IFA antenna assembly extends toward the IFA antenna assembly and then bends and extends to the second conductive frame segment.

8. The antenna structure of claim 1, wherein the two break seams are located on the same side of the conductive bezel.

9. An electronic device, comprising: an antenna structure as claimed in any one of claims 1 to 8.