WO2022042533A1

WO2022042533A1 - Antenna structure and electronic device

Info

Publication number: WO2022042533A1
Application number: PCT/CN2021/114270
Authority: WO
Inventors: 刘冰子
Original assignee: 维沃移动通信有限公司
Priority date: 2020-08-31
Filing date: 2021-08-24
Publication date: 2022-03-03
Also published as: CN112018519B; CN112018519A

Abstract

Provided are an antenna structure and an electronic device. The antenna structure comprises a first conductor, a second conductor, a first feed structure and a second feed structure, wherein a gap is provided between a first end of the first conductor and a first end of the second conductor; the first end of the first conductor is connected to a first end of the first feed structure, and a second end of the first conductor is grounded; the first end of the second conductor is connected to a second end of the first feed structure, and a second end of the second conductor is grounded; a first end of the second feed structure is connected to the first conductor and/or the second conductor, and a second end of the second feed structure is grounded; and where the first feed structure and the second feed structure generate feed excitation, the antenna structure generates a first antenna mode and a second antenna mode, and the first antenna mode and the second antenna mode are orthogonal to each other in terms of polarization, and cover at least one of the same working bands.

Description

Antenna structure and electronic equipment

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims priority to Chinese Patent Application No. 202010894643.0 filed in China on Aug. 31, 2020, the entire contents of which are incorporated herein by reference.

technical field

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

Background technique

At present, most electronic devices are equipped with antennas for wireless communication, such as a positioning antenna for implementing a positioning function, a Bluetooth antenna for implementing Bluetooth communication, and the like. With the increasing demand for metal appearance and 5G and Multi Input Multi Output (MIMO) technology, the number of antennas in electronic devices is also increasing, resulting in poor isolation between different antennas .

SUMMARY OF THE INVENTION

Embodiments of the present invention provide an antenna structure and an electronic device to solve the problem of poor isolation between antennas in an existing electronic device.

In a first aspect, an embodiment of the present invention provides an antenna structure, including a first electrical conductor, a second electrical conductor, a first feeding structure, and a second feeding structure, wherein the first end of the first electrical conductor and all the A gap is formed between the first ends of the second conductor;

The first end of the first electrical conductor is connected to the first end of the first feeding structure, and the second end of the first electrical conductor is grounded; the first end of the second electrical conductor is connected to the first end of the first electrical conductor. A second end of a feeding structure is connected, and the second end of the second electrical conductor is grounded and the first end of the second feeding structure is connected to the first electrical conductor and/or the second electrical conductor, the second end of the second feeding structure is grounded;

Wherein, when the first feeding structure and the second feeding structure generate feed excitation, the antenna structure generates a first antenna mode and a second antenna mode, and the first antenna mode and the second antenna mode are orthogonally polarized, and the first antenna mode and the second antenna mode cover at least one same working frequency band.

In a second aspect, an embodiment of the present invention further provides an electronic device, where the electronic device includes the antenna structure described in the first aspect.

In the technical solution provided by this embodiment, through the design of one slot, the first antenna mode and the second antenna mode can be generated at the same time, and the first antenna mode and the second antenna mode can cover at least one same working frequency band, In addition, when the first antenna mode and the second antenna mode cover the same working frequency band, they have high isolation from each other, so as to ensure that the antenna structure has better signal transmission and reception performance.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without any creative effort.

1 is a structural diagram of an electronic device according to a first embodiment of the present invention;

Fig. 2 is a kind of structure enlarged view of antenna structure A in Fig. 1;

FIG. 3 is an enlarged view of another structure of the antenna structure A in FIG. 1;

4 is a structural diagram of an antenna structure provided by an embodiment of the present invention;

FIG. 5 is a structural diagram of another antenna structure provided by an embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

An embodiment of the present invention provides an antenna structure, please refer to FIG. 1 to FIG. 5 , the antenna structure includes a first electrical conductor 11 , a second electrical conductor 12 , a first feeding structure 14 and a second feeding structure 15 , A gap 101 is formed between the first end of the first conductor 11 and the first end of the second conductor 12 ; the first end of the first conductor 11 and the first feeding structure 14 The first end of the first conductor 11 is connected to the ground; the first end of the second conductor 12 is connected to the second end of the first feeding structure 14, and the second conductor The second end of the body 12 is grounded; the first end of the second feed structure 15 is connected to the first conductor 11 and/or the second conductor 12, and the first end of the second feed structure 15 is connected to the first conductor 11 and/or the second conductor 12. Both ends are grounded; wherein, when the first feed structure 14 and the second feed structure 15 generate feed excitation, the antenna structure generates a first antenna mode and a second antenna mode, so The polarizations between the first antenna mode and the second antenna mode are orthogonal, and the first antenna mode and the second antenna mode cover at least one same working frequency band.

In this embodiment, a gap 101 is provided between the first conductor 11 and the second conductor 12 , the second end of the first conductor 11 is grounded, and the second end of the second conductor 12 is grounded. It should be noted that the ground may be the main ground provided on the printed circuit board 13 in the electronic device. In this way, the slot 101 , the first end of the first conductor 11 , the second end of the second conductor 12 and the main body substantially constitute the specific structure of the slot antenna. The first end of the first electrical conductor 11 and the first end of the second electrical conductor 12 are both connected to the first feeding structure 14 , and the second feeding structure 15 is connected to the first electrical conductor 11 and/or the first electrical conductor 11 . The second conductors 12 are connected. The first feeding structure 14 is in a balanced feeding mode, and the second feeding structure 15 is an inductive feeding mode. When the first feeding structure 14 and the second feeding structure 15 generate a feeding When electrically excited, the antenna structure can generate a first antenna mode and a second antenna mode. Due to the settings of the first feeding structure 14 and the second feeding structure 15, the first antenna mode and the second antenna mode are The polarization is orthogonal, so that the first antenna mode and the second antenna mode can cover at least one same working frequency band, and when the first antenna mode and the second antenna mode cover the same working frequency band, the first antenna mode and the second antenna mode can cover the same working frequency band. The first antenna mode and the second antenna mode have a high degree of isolation, which ensures that both the first antenna mode and the second antenna mode can have better radio frequency signal transmission and reception performance.

In the antenna structure provided in this embodiment, two antenna modes that can cover the same working frequency band and have higher isolation are designed through one slot 101, thereby reducing the number of slots 101 in the antenna structure of the electronic device and reducing the number of electronic devices. The hardware cost is low, and it can ensure that the electronic device can achieve better antenna performance.

Optionally, the first conductor 11 is any one of a metal frame, a printed circuit board, and a flexible circuit board, and the second conductor 12 is any one of a metal frame, a printed circuit board, and a flexible circuit board By. That is, the formation of the slot 101 may be realized by a metal frame and/or a printed circuit board (Printed Circuit Board, PCB) and/or a flexible printed circuit (Flexible Printed Circuit, FPC) of the electronic device.

For example, the first conductor 11 and the second conductor 12 are both metal frames; alternatively, the first conductor 11 is a metal frame, and the second conductor 12 is a part of a printed circuit board or a Or, the first conductor 11 and the second conductor 12 are both arranged on the printed circuit board, and the gap 101 is constructed by using the space on the printed circuit board, so that the The number of the gaps 101 on the metal frame of the electronic device is reduced, and the aesthetics of the appearance of the electronic device is improved.

It should be noted that the working frequency band covered by the first antenna mode can be adjusted by the size of the first antenna radiator. For example, the first conductor 11 is a metal frame, and the first conductor 11 In order to form a part of the first antenna radiator, the size of the first conductor 11 can be adjusted so that the first antenna radiator covers different working frequency bands, or the first antenna radiator can also include a tuning inductance. The inductance value of the inductance enables the first antenna radiator to cover different working frequency bands. Based on a similar principle, the working frequency band covered by the second antenna radiator may also be adjusted by the above solution. In this way, the first antenna mode can cover at least one working frequency band, the second antenna mode can also cover at least one working frequency band, and the first antenna mode and the second antenna mode can cover At least one of the same operating frequency band. For example, both the first antenna mode and the second antenna mode can cover the n78 frequency band.

Referring to FIG. 2 and FIG. 4 , in an optional implementation manner of this embodiment, the second feeding structure 15 includes a microstrip line 151 and a feeding port 152 , two ends of the microstrip line 151 are respectively The first conductor 11 and the second conductor 12 are connected, one end of the feeding port 152 is connected to the microstrip line 151 , and the other end of the feeding port 152 is grounded.

Optionally, the microstrip line 151 may be arranged on a printed circuit board, the first conductor 11 and the second conductor 12 are both metal frames, and the two ends of the microstrip line 151 are respectively connected to the first conductor 11 and the second conductor. The conductor 12 and the microstrip line 151 are grounded through the feeding port 152 . With this arrangement, the second feeding structure 15 is designed in a balanced feeding manner, so that the reverse effect of the current generated by the second feeding structure 15 at both ends of the slot 101 is more balanced, thereby making the first antenna modal There is a better isolation effect between the first antenna mode and the second antenna mode, ensuring the radiation performance of the first antenna mode and the second antenna mode when covering the same working frequency band.

Please refer specifically to FIG. 4 , the second feeding structure 15 may further include a first feeding spring 153 and a second feeding spring 154 . The first feeding spring 153 and the second feeding spring 154 are assembled by surface assembly technology. (Surface Mounted Technology, SMT) is soldered on the FR-4 dielectric area of the printed circuit board. The first end of the microstrip line 151 is connected to the first conductor 11 through the first feeding spring 153 , and the second end of the microstrip line 151 is connected to the second conductor 12 through the second feeding spring 154 . In this way, the microstrip line 151 is connected to the first conductor 11 and the second conductor 12 through the first feeding spring 153 and the second feeding spring 154 respectively, which makes better use of the space on the printed circuit board. .

In this embodiment, the other end of the feeding port 152 is connected to the printed circuit board 13 to achieve grounding, which further ensures good isolation between the first antenna mode and the second antenna mode.

Referring to FIG. 3 and FIG. 5 , in another implementation of this embodiment, the second feeding structure 15 includes a matching circuit 155 , a first signal line 156 and a second signal line 157 ; the first signal The first end of the line 156 is connected to the second conductor 12, the second end of the first signal line 156 is connected to the first end of the matching circuit 155, and the second end of the matching circuit 155 is connected to the The first end of the second signal line 157 is connected, and the second end of the second signal line 157 is grounded.

Optionally, the matching circuit 155 may include tunable capacitors and/or inductors, and by adjusting the capacitance value of the capacitor and/or the inductance value of the inductor, the antenna operating frequency band may be adjusted.

In this embodiment, the matching circuit 155 , the first signal line 156 and the second signal line 157 are all disposed on the flexible circuit board 16 , and the material of the flexible circuit board 16 may be Liquid Crystal Polymer (LCP). ), polyimide (Polyimide Film, PI), modified polyimide (Modified Polyimide Film, MPI), etc., and the flexible circuit board 16 is a double layer.

Optionally, the first conductor 11 and the second conductor 12 are both metal frames, and the first signal line 156 and the second signal line 157 may be provided on the flexible circuit board 16 . On the same side, the first end of the first signal line 156 is connected to the first embedded steel sheet 18, and the first embedded steel sheet 18 is locked on the second conductor 12 by screws, so that the first signal line 156 Conduction with the second conductor 12; the second end of the second signal line 157 is connected to the second embedded steel sheet, and the second embedded steel sheet is locked on the printed circuit board 13 by screws, so that the second embedded steel sheet is The signal line 157 is grounded. The second feeding structure 15 formed by the matching circuit 155 , the first signal line 156 and the second signal line 157 is an inductive feeding method to ensure that the first feeding structure 14 and the second feeding structure 15 generate power When excited, the antenna structure can generate a first antenna mode and a second antenna mode, and the first antenna mode and the second antenna mode can cover at least one same working frequency band, reducing the number of slots 101 on the antenna structure , thereby reducing hardware costs.

In this embodiment, the ground terminal of the flexible circuit board 16 is connected to the ground terminal of the printed circuit board, which further ensures good isolation between the first antenna mode and the second antenna mode.

In the antenna structure provided in this embodiment, through the design of one slot 101, a first antenna mode and a second antenna mode can be generated at the same time, and the first antenna mode and the second antenna mode can cover at least one same working frequency band , and when the first antenna mode and the second antenna mode cover the same working frequency band, they have a better isolation effect between each other, ensuring that the antenna structure has better signal transceiver performance.

An embodiment of the present invention also provides an electronic device, where the electronic device includes the above-mentioned antenna structure. The electronic device includes all the technical features of the antenna structure as described above, and can achieve the same technical effect. To avoid repetition, details are not described here.

It should be noted that, the first feeding structure in the antenna structure spans the slot, making full use of the structural space of the slot.

The electronic device may include at least one of a cell phone, a tablet computer, an e-book reader, an MP3 player, an MP4 player, a digital camera, a laptop computer, a car computer, a desktop computer, a set-top box, a smart TV, and a wearable device. one.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed by the present invention can easily think of changes or replacements, which should cover within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

An antenna structure, comprising a first electrical conductor, a second electrical conductor, a first feeding structure and a second feeding structure, the first end of the first electrical conductor and the first end of the second electrical conductor are There are gaps between;

The first end of the first electrical conductor is connected to the first end of the first feeding structure, and the second end of the first electrical conductor is grounded; the first end of the second electrical conductor is connected to the first end of the first electrical conductor. The second end of a feeding structure is connected, and the second end of the second electrical conductor is grounded; the first end of the second feeding structure is connected to the first electrical conductor and/or the second electrical conductor , the second end of the second feeding structure is grounded;

Wherein, when the first feeding structure and the second feeding structure generate feed excitation, the antenna structure generates a first antenna mode and a second antenna mode, and the first antenna mode The polarization is orthogonal to the second antenna mode, and the first antenna mode and the second antenna mode cover at least one same working frequency band.
The antenna structure according to claim 1, wherein the second feeding structure comprises a microstrip line and a feeding port, and two ends of the microstrip line are respectively connected to the first conductor and the second conductor One end of the feeding port is connected to the microstrip line, and the other end of the feeding port is grounded.
The antenna structure according to claim 2, further comprising a first feeding spring and a second feeding spring, the first end of the microstrip line is connected to the first conductive through the first feeding spring The second end of the microstrip line is connected to the second conductor through the second feeding spring.
The antenna structure of claim 1, wherein the second feed structure includes a matching circuit, a first signal line, and a second signal line;

The first end of the first signal line is connected to the second conductor, the second end of the first signal line is connected to the first end of the matching circuit, and the second end of the matching circuit is connected to the The first end of the second signal line is connected, and the second end of the second signal line is grounded.
The antenna structure of claim 4, wherein the matching circuit is provided on a flexible circuit board.
The antenna structure of claim 4 , wherein the first signal line and the second signal line are both disposed on a flexible circuit board.
The antenna structure according to any one of claims 1-6, wherein the first conductor is any one of a metal frame, a printed circuit board, and a flexible circuit board, and the second conductor is a metal frame , any one of printed circuit boards and flexible circuit boards.
An electronic device comprising the antenna structure of any one of claims 1-7.
9. The electronic device of claim 8, wherein the first feed structure spans the gap.