WO2021098673A1

WO2021098673A1 - Antenna and electronic device

Info

Publication number: WO2021098673A1
Application number: PCT/CN2020/129317
Authority: WO
Inventors: 简宪静; 黄奂衢; 王义金
Original assignee: 维沃移动通信有限公司
Priority date: 2019-11-21
Filing date: 2020-11-17
Publication date: 2021-05-27
Also published as: CN110994144A

Abstract

The present invention provides an antenna and an electronic device, said antenna comprising a metal groove; four metal tabs, the four metal tabs being arranged in the metal groove at intervals and electrically connected to the bottom of the metal groove; a coupling metal tab, the coupling metal tab being arranged between the four metal tabs and being feed-coupled with the four metal tabs.

Description

Antenna and electronic equipment

Cross-references to related applications

This application claims the priority of Chinese Patent Application No. 201911147352.9 filed in China on November 21, 2019, the entire content of which is incorporated herein by reference.

Technical field

The present invention relates to the field of communication technology, in particular to an antenna and electronic equipment.

Background technique

With the rapid development of communication technology, multi-antenna communication has become the mainstream and future development trend of electronic equipment, and in this process, millimeter wave antennas are gradually introduced into electronic equipment. Millimeter wave antennas can provide higher communication speeds, lower delays, and more simultaneous connections, etc., bringing greater convenience to users' lives.

However, in the prior art, the millimeter wave antenna is easily affected by some components on the electronic equipment, resulting in poor radiation performance.

Summary of the invention

The embodiments of the present invention provide an antenna and an electronic device to solve the problem that the millimeter wave antenna of the electronic device is easily affected by some components on the electronic device, resulting in poor radiation performance.

In a first aspect, an embodiment of the present invention provides an antenna, including: a metal groove; four metal sheets, the four metal sheets are arranged in the metal groove at intervals and are electrically connected to the groove bottom of the metal groove Coupling metal sheets, the coupling metal sheets are arranged between the four metal sheets, and are coupled with the four metal sheets for feeding.

In the second aspect, an embodiment of the present invention provides an electronic device including the above-mentioned antenna.

The antenna of the embodiment of the present invention includes a metal groove; four metal sheets, the four metal sheets are arranged in the metal groove at intervals and are electrically connected to the bottom of the metal groove; and the coupling metal sheets, the coupling The metal sheet is arranged between the four metal sheets and is feed-coupled with the four metal sheets. The embodiment of the present invention can improve the radiation performance of the millimeter wave antenna.

Description of the drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the following will briefly introduce the drawings 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 be obtained from these drawings without creative labor.

FIG. 1 is one of the schematic structural diagrams of an antenna provided by an embodiment of the present invention;

FIG. 2 is the second structural diagram of the antenna provided by the embodiment of the present invention;

FIG. 3 is the third structural diagram of an antenna provided by an embodiment of the present invention;

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

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

Fig. 6 is a reflection coefficient diagram provided by an embodiment of the present invention;

FIG. 7 is one of structural schematic diagrams of an electronic device provided by an embodiment of the present invention;

FIG. 8 is a second structural diagram of an electronic device provided by an embodiment of the present invention;

FIG. 9 is a third structural diagram of an electronic device provided by an embodiment of the present invention;

FIG. 10 is a sixth structural diagram of an antenna provided by an embodiment of the present invention;

FIG. 11 is a seventh structural diagram of an antenna provided by an embodiment of the present invention;

Fig. 12 is a schematic structural diagram of a coupling metal sheet provided by an embodiment of the present invention.

Detailed ways

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

Referring to FIG. 1, FIG. 1 is a schematic structural diagram of an antenna provided by an embodiment of the present invention. As shown in FIG. 1, it includes a metal groove; four metal sheets 1, which are arranged at intervals in the metal groove, and It is electrically connected to the bottom of the metal groove; a coupling metal sheet 2 is provided between the four metal sheets 1 and is electrically coupled to the four metal sheets 1.

In this embodiment, the above-mentioned metal groove may be a square groove, and the above-mentioned antenna may be arranged on an electronic device. If the metal frame of the electronic device has a curvature, the four metal sheets 1 can be designed conformally with the curvature of the metal frame. The four metal sheets 1 can be symmetrically placed in the center of the metal groove, that is, the distance between each metal sheet of the four metal sheets 1 and the nearest adjacent side of the metal groove is equal to the metal groove. The coupling metal sheet 2 can be placed in the middle of the groove, the four ends of the coupling metal sheet 2 can be directly connected to the feeding probe (ie, the conductive member), and the feeding probe is connected to the signal source.

In order to better understand the structure of the above-mentioned antenna, please refer to FIGS. 2 to 4. FIGS. 2 to 4 are schematic diagrams of the antenna structure provided by the embodiments of the present invention. First, as shown in Figure 2, at this time, there are 4 antenna units on the antenna. Four metal sheets 1 and one coupling metal sheet 2 are arranged in each metal groove, and the metal groove is filled with an insulating medium 3.

Please refer to FIGS. 3 and 4. FIG. 3 can be understood as the perspective view of FIG. 1, and FIG. 4 can be understood as the perspective view of FIG. 2. The above structure can be better understood through FIGS. 3 and 4.

Please refer to FIG. 5 again, which is a schematic structural diagram of an antenna provided by an embodiment of the present invention. The bottom of the metal groove is provided with four circular holes 4, and the four feeder probes 5 can pass through the four circular holes 4 to be connected to the coupling metal sheet 2 respectively.

Please refer to FIG. 6 again, which is a diagram of the reflection coefficient provided by the antenna according to the embodiment of the present invention. As shown in Figure 6, the -10dB bandwidth can cover 24GHz-44GHz, and the relative bandwidth can reach 58.8%, which can cover the world's mainstream 5G millimeter wave frequency band, thereby enhancing the roaming experience.

In this embodiment, the above-mentioned antenna may be provided on an electronic device. Please refer to FIG. 7 to FIG. 9. FIG. 7 to FIG. 9 are schematic diagrams of the structure of an electronic device provided by an embodiment of the present invention.

First of all, as shown in Figure 7, the metal frame 6 of the electronic device may have multiple slits, for example, there may be four slits. The number and position of the slits can be adjusted according to actual conditions such as the number of antennas and frequency band requirements. This embodiment of the present invention does not limit this. The four slits can divide the metal frame 6 into four parts, namely the first side 61, the second side 62, the third side 63 and the fourth side 64. Non-millimeter wave antennas can be designed on these sides. For example, the first side 61 can be used to design non-millimeter wave antennas such as 2G/3G/LTE/5G/GNSS/WIFI. In this embodiment, a millimeter-wave antenna (positioned in a dashed box) can also be provided on the first side 61, that is, the millimeter-wave antenna is integrated in a non-millimeter-wave antenna, thereby saving space and improving the competitiveness of the product.

As shown in Figs. 8 and 9, the position of the dashed frame indicates that an antenna array is provided, so that at least two antenna arrays are provided on the metal frame. Of course, the positions of these antenna arrays can be adjusted according to actual conditions, which is not limited in this embodiment. Designing millimeter-wave array antennas in other positions of the metal frame of electronic equipment, so that the millimeter-wave array antennas of various parts work together, can reduce the impact of the handheld state on the performance of the millimeter-wave array antenna and improve the coverage of the millimeter-wave antenna, such as CDF indicators.

In this embodiment, the millimeter wave array antenna is designed in the metal groove of the antenna, and the surrounding of the millimeter wave array antenna has a shielding function except for the radiation direction, so as to avoid interference from the surrounding environment or metal devices, and there is no other radiation direction. The medium has greatly improved the performance of the millimeter wave array antenna, including the performance of beam scanning, thereby enhancing the user's wireless communication experience. And can be based on the metal frame design of the electronic device, without affecting the metal texture of the electronic device, and enhance the user's wireless experience of multiple millimeter wave frequency bands when roaming around the world, and use the metal frame itself as the reflector of the antenna to obtain higher gain.

Optionally, the coupling metal sheet 2 is connected to two pairs of differential signals.

In this embodiment, the aforementioned coupling metal sheet 2 is connected to two pairs of differential signals to facilitate differential feeding.

Optionally, each of the four metal sheets 1 includes a horizontal metal sheet 11 that does not intersect with the bottom of the groove and a vertical metal sheet 12 that is electrically connected to the bottom of the groove. The horizontal metal sheet 11 is connected to the vertical metal sheet. The slices 12 are connected vertically.

In order to better understand the foregoing structure, please refer to FIG. 10 and FIG. 11. FIG. 10 and FIG. 11 are both schematic diagrams of the antenna structure provided by the embodiment of the present invention. As shown in FIGS. 10 and 11, each of the four metal sheets 1 includes a horizontal metal sheet 11 that does not intersect with the bottom of the groove and a vertical metal sheet 12 that is electrically connected to the bottom of the groove. Connect with the vertical metal sheet 12. Since the horizontal metal sheet 11 and the vertical metal sheet 12 are connected, the coupling of the four metal sheets 1 and the coupling metal sheet 2 is facilitated.

Optionally, the metal groove, the four metal sheets 1 and the coupling metal sheet 2 are filled with an insulating medium 3. The insulating medium is a non-metallic medium. By filling the metal groove with a non-metallic medium, both the metal sheet and the coupling metal sheet can be fixed in the metal groove.

In this embodiment, the metal groove, the four metal sheets 1 and the coupling metal sheet 2 are filled with an insulating medium 3, so as to protect and protect the four metal sheets 1 and the coupling metal sheet 2. The role of fixation, and can maintain a better appearance.

Optionally, the coupling metal sheet 2 includes a cross-shaped first part and four second parts, each second part has a rectangular structure, the first part is parallel to the bottom of the groove, and the second part is parallel to the bottom of the groove. The bottom of the groove is vertical, and the four second parts are respectively connected to the four free ends of the first part and extend toward the bottom of the groove. Each second part is insulated from the bottom of the groove.

In order to better understand the above structure, please refer to FIG. 12, which is a schematic structural diagram of a coupling metal sheet provided by an embodiment of the present invention. As shown in FIG. 12, the coupling metal sheet 2 includes a cross-shaped first part and four second parts. Each second part has a rectangular structure. The first part is parallel to the bottom of the groove, and the second part is parallel to the bottom of the groove. The part is perpendicular to the bottom of the groove, and the four second parts are respectively connected to the four free ends of the first part and extend toward the bottom of the groove. Each second part has a rectangular structure, the first part is parallel to the bottom of the metal groove, and the second part is perpendicular to the bottom of the metal groove.

Optionally, a feeding point is provided on a side of each second part close to the bottom of the groove, and the feeding signals received by different feeding points of the two opposite feeding points are equal in magnitude and opposite in phase.

In order to better understand the above structure, it can also be understood with reference to FIG. 10. The feeding probe 51 may be a probe V-, the feeding probe 52 may be a probe H+, the feeding probe 53 may be a probe V+, and the feeding probe 54 may be a probe H-.

As shown in Figure 10, the probe V- and the probe V+ can be metal cylinders, which are connected to a signal source to feed the antenna unit of this embodiment differentially, that is, the signal amplitudes connected to the probe V- and the probe V+ are equal. The phase difference is 180°. Due to the use of differential feed, it can improve the ability of common mode rejection, anti-interference ability, and can improve the end-to-end isolation of the differential and the purity of the polarization. In the same way, probe H- and probe H+ are also connected to the differential feed. When the signal sources connected to probe V- and probe V+ work at the same time, it can excite vertically polarized radiation waves. When the pin H+ works at the same time, it can excite horizontally polarized radiation waves and achieve dual-polarized radiation, thereby reducing the probability of disconnection, improving the stability and signal quality of wireless communication, and improving the user's wireless communication experience.

Further, when the signal sources connected to the probe V- and the probe V+ and the probe H- and the probe H+ work at the same time, MIMO can be formed, which can increase the data transmission rate. The feeding probe passes through the hole dug in the metal cavity, so that the feeding probe is insulated from the metal of the metal cavity, the hole can be filled with insulating dielectric material, and the feeding probe is connected to the signal source.

Generally speaking, the cross-shaped coupling metal sheet is shorter than the horizontal metal sheet. There is a gap between the coupling metal sheet and the vertical metal sheet. The signal of the signal source is transmitted to the horizontal part through the vertical part of the coupling metal sheet (the second part mentioned above). The horizontal part couples energy to the horizontal metal sheet and the vertical metal sheet. Since the structure of the antenna unit is a symmetrical structure, it forms a self-complementary antenna, so that the impedance of the antenna changes little in a wide frequency range, and the bandwidth of the antenna is very wide. .

In this embodiment, a new symmetrical self-complementary antenna structure is introduced, which can greatly increase the bandwidth of the antenna. The -10dB bandwidth can cover from 24GHz-44GHz, and the relative bandwidth can reach 58.8%, which can cover the world's mainstream 5G millimeter wave frequency band. . And the use of differential feed mode can improve the ability of common mode rejection, anti-interference ability, and can improve the end-to-end isolation of the differential and the purity of polarization. Using two pairs of differential orthogonal feeds for the same antenna unit realizes a dual-polarization design. One can form a MIMO function to increase the data transmission rate, and the other can form a dual polarization, which can increase the wireless connection capability of the antenna. , Reduce the probability of communication disconnection, improve communication effect and user experience.

Optionally, the minimum distance between the coupling metal sheet 2 and the opening of the metal groove is greater than the minimum distance between the four metal sheets 1 and the opening of the groove.

In this embodiment, the minimum distance between the coupling metal sheet 2 and the opening of the metal groove is greater than the minimum distance between the four metal sheets 1 and the opening of the groove, so that the antenna can be more Good radiation performance.

Optionally, the antenna is a millimeter wave antenna.

In this embodiment, the antenna is a millimeter wave antenna, which can make the antenna have better radiation performance.

Optionally, the radiator where the antenna is located is also the radiator of the first antenna, and the first antenna is a non-millimeter wave antenna.

In this embodiment, the radiator where the antenna is located is also the radiator of the first antenna, and the first antenna is a non-millimeter wave antenna. In this way, the above-mentioned antenna can be built on the radiator of a cellular antenna or a non-cellular antenna, sharing the radiator. In addition, it can be integrated with non-millimeter wave antennas with metal frames or metal shells as antennas of electronic equipment, that is, millimeter antennas are compatible with non-millimeter wave antennas with metal frames or metal shells as antennas, thereby saving space and improving products. Competitiveness.

An antenna according to an embodiment of the present invention includes a metal groove; four metal sheets 1, the four metal sheets 1 are arranged in the metal groove at intervals and are electrically connected to the bottom of the metal groove; and a coupling metal sheet 2. The coupling metal sheet 2 is arranged between the four metal sheets 1 and is electrically coupled with the four metal sheets 1. The embodiment of the present invention can improve the radiation performance of the millimeter wave antenna.

An embodiment of the present invention also provides an electronic device including the above-mentioned antenna.

In this embodiment, the above-mentioned electronic equipment can be applied to wireless inter-city network, wireless wide area network, wireless local area network, wireless personal network, multiple input multiple output, radio frequency identification, and even near field communication, wireless charging or FM, etc. The design and use of wireless communication can also be applied to regulatory testing and actual design and use of human safety, health, and compatibility of electronic devices (such as hearing aids or heart rate regulators, etc.).

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article, or device that includes the element.

The embodiments of the present invention are described above with reference to the accompanying drawings, but the present invention is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art are Under the enlightenment of the present invention, many forms can be made without departing from the purpose of the present invention and the scope of protection of the claims, all of which fall within the protection of the present invention.

Claims

An antenna including:

Metal groove

Four metal sheets, the four metal sheets are arranged in the metal groove at intervals and are electrically connected to the groove bottom of the metal groove;

The coupling metal sheet is arranged between the four metal sheets and is electrically coupled with the four metal sheets.
The antenna according to claim 1, wherein the coupling metal sheet is connected to two pairs of differential signals.
The antenna according to claim 1, wherein each of the four metal sheets comprises a horizontal metal sheet that does not intersect with the bottom of the groove and a vertical metal sheet that is electrically connected to the bottom of the groove, and the horizontal metal sheet is connected to the bottom of the groove. The vertical metal sheet connection.
The antenna according to claim 1, wherein the metal groove, the four metal sheets and the coupling metal sheet are filled with an insulating medium.
The antenna according to claim 1, wherein the coupling metal sheet comprises a first part having a cross shape and four second parts, each second part has a rectangular structure, and the first part is parallel to the bottom of the groove, The second part is perpendicular to the bottom of the groove, and the four second parts are respectively connected to the four free ends of the first part and extend toward the bottom of the groove.
The antenna according to claim 5, wherein each second part is provided with a feeding point on a side close to the bottom of the groove, and the feeding signals received by different feeding points of any two feeding points are equal in size and The phase is opposite.
The antenna according to claim 1, wherein the minimum distance between the coupling metal sheet and the opening of the metal groove is greater than the minimum distance between the four metal sheets and the opening of the groove.
The antenna according to claim 1, wherein the antenna is a millimeter wave antenna.
The antenna according to claim 1, wherein the radiator where the antenna is located is also the radiator of the first antenna, and the first antenna is a non-millimeter wave antenna.
An electronic device comprising the antenna according to any one of claims 1 to 9.