CN110600866A - Antenna unit and terminal equipment - Google Patents

Abstract

Embodiments of the present invention provide an antenna unit and a terminal device, which relate to the field of communication technologies, and solve the problem that the existing millimeter-wave antenna of the terminal device covers less frequency bands, resulting in poor performance of the antenna of the terminal device. The antenna unit includes: a metal groove, M feeding parts arranged at the bottom of the metal groove, and M feeding arms arranged in the metal groove; wherein, each feeding part in the M feeding parts respectively electrically connected to one feeder arm and insulated from the metal groove, the distance between each of the M feeder arms and the bottom inner surface of the metal groove is greater than half of the first distance, and Both are coupled with the metal groove, the first distance is the distance between the surface where the opening of the metal groove is located and the inner surface of the bottom of the metal groove, and M is a positive integer. The antenna unit is applied in terminal equipment.

Description

A kind of antenna unit and terminal equipment

technical field

Embodiments of the present invention relate to the field of communication technologies, and in particular, to an antenna unit and a terminal device.

Background technique

With the development of the fifth-generation mobile communication (5th-Generation, 5G) system and the wide application of terminal equipment, millimeter-wave antennas are gradually applied in various terminal equipment to meet the increasing usage needs of users.

At present, the millimeter wave antenna in the terminal device is mainly realized through an antenna in package (antenna in package, AiP) technology. For example, as shown in FIG. 1, an array antenna 11 whose operating wavelength is a millimeter wave, a radio frequency integrated circuit (radio frequency integrated circuit, RFIC) 12, a power management integrated circuit (powermanagement integrated circuit, PMIC) 13, and The connector 14 is packaged into a module 10, and the module 10 may be called a millimeter wave antenna module. Wherein, the antennas in the above-mentioned array antennas may be patch antennas, Yagi-Uda antennas, or dipole antennas.

However, since the antennas in the above-mentioned array antennas are usually narrow-band antennas (such as the above-mentioned patch antennas, etc.), the coverage frequency band of each antenna is limited, but there are usually more millimeter-wave frequency bands planned in the 5G system, such as 28GHz The main n257 (26.5-29.5GHz) frequency band and the n260 (37.0-40.0GHz) frequency band mainly 39GHz, etc., so the traditional millimeter-wave antenna module may not be able to cover the mainstream millimeter-wave frequency band planned in the 5G system, thus As a result, the antenna performance of the terminal equipment is poor.

Contents of the invention

Embodiments of the present invention provide an antenna unit and a terminal device, so as to solve the problem that the existing millimeter-wave antenna of the terminal device covers less frequency bands, resulting in poor performance of the antenna of the terminal device.

In order to solve the above-mentioned technical problems, the application is implemented as follows:

In the first aspect, the embodiment of the present invention provides an antenna unit, the antenna unit includes: a metal groove, M feeding parts arranged at the bottom of the metal groove, and M feeding arms arranged in the metal groove ; wherein, each feeder in the M feeders is electrically connected to a feeder arm and insulated from the metal groove, and each feeder arm in the M feeder arms is connected to the bottom of the metal groove The distance between the inner surfaces is greater than half of the first distance, and they are all coupled with the metal groove. The first distance is the distance between the surface where the opening of the metal groove is located and the inner surface of the bottom of the metal groove, and M is positive integer.

In a second aspect, an embodiment of the present invention provides a terminal device, where the terminal device includes the antenna unit in the foregoing first aspect.

In the embodiment of the present invention, the antenna unit may include a metal groove, M feeding parts arranged at the bottom of the metal groove, and M feeding arms arranged in the metal groove; wherein, the M feeding parts Each feed part in the M feed arms is electrically connected to one feed arm and insulated from the metal groove, and the distance between each feed arm of the M feed arms and the bottom inner surface of the metal groove is greater than the first One-half of the distance is coupled with the metal groove, the first distance is the distance between the surface where the opening of the metal groove is located and the inner surface of the bottom of the metal groove, and M is a positive integer. Through this solution, since the feed arm can be coupled with the metal groove, when the feed arm receives an AC signal, the feed arm can be coupled with the metal groove, so that the metal groove can generate an induced AC signal, And then can make the feed arm and the metal groove radiate electromagnetic waves of a certain frequency; and, because the current path of the induced current generated by the coupling of the feed arm and the metal groove can have multiple (for example, from the feed arm to the metal groove to the The current path of the feed arm, the current path formed on the metal groove, etc.), so the frequency of the electromagnetic wave generated by the current on the feed arm through the metal groove can also have multiple frequencies, so that the antenna unit can cover multiple The frequency band, which can increase the frequency band covered by the antenna unit.

Description of drawings

FIG. 1 is a schematic structural diagram of a traditional millimeter-wave antenna provided by an embodiment of the present invention;

FIG. 2 is one of the exploded views of the antenna unit provided by the embodiment of the present invention;

FIG. 3 is a reflection coefficient diagram of an antenna unit provided by an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a feed arm provided by an embodiment of the present invention;

FIG. 5 is the second explosion diagram of the antenna unit provided by the embodiment of the present invention;

FIG. 6 is a top view of an antenna unit provided by an embodiment of the present invention;

FIG. 7 is a cross-sectional view of an antenna unit provided by an embodiment of the present invention;

Fig. 8 is the third explosion diagram of the antenna unit provided by the embodiment of the present invention;

FIG. 9 is one of the schematic diagrams of the hardware structure of the terminal device provided by the embodiment of the present invention;

FIG. 10 is the second schematic diagram of the hardware structure of the terminal device provided by the embodiment of the present invention;

FIG. 11 is one of the radiation pattern diagrams of the antenna unit provided by the embodiment of the present invention;

Fig. 12 is the second radiation pattern diagram of the antenna unit provided by the embodiment of the present invention;

Fig. 13 is a bottom view of a terminal device provided by an embodiment of the present invention.

Explanation of reference signs: 10—millimeter wave antenna module; 11—array antenna whose working wavelength is millimeter wave; 12—RFIC; 13—PMIC; 14—connector; 20—antenna unit; 201—metal groove; 202— 202a—the first end of the feeding portion; 203—the feeding arm; 204—the first insulator; 205—the second insulator; 206—the through hole; 207—the third insulator; S1—the first plane; L1 —first axis of symmetry; L2—second axis of symmetry; L3—first diagonal; L4—second diagonal; B1—first side of the first insulator; a1—distance 1; a2—distance 2; 30 —5G millimeter wave signal; 4—terminal equipment; 40—housing; 41—first metal frame; 42—second metal frame; 43—third metal frame; 44—fourth metal frame; 45—floor; 46— First antenna; 47—first groove.

It should be noted that, in the embodiment of the present invention, the coordinate axes in the coordinate system shown in the drawings are orthogonal to each other.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

The term "and/or" in this article is an association relationship describing associated objects, which means that there can be three relationships, for example, A and/or B can mean: A exists alone, A and B exist simultaneously, and B exists alone These three situations. The symbol "/" in this document indicates that the associated object is an or relationship, for example, A/B indicates A or B.

The terms "first" and "second" in the specification and claims of the present invention are used to distinguish different objects, rather than to describe a specific order of objects. For example, a first insulator, a second insulator, etc. are used to distinguish different insulators, not to describe a specific order of the insulators.

In the embodiments of the present invention, words such as "exemplary" or "for example" are used as examples, illustrations or illustrations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present invention shall not be construed as being more preferred or more advantageous than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete manner.

In the description of the embodiments of the present invention, unless otherwise specified, "multiple" means two or more, for example, a plurality of antenna units refers to two or more antenna units.

Some terms/nouns involved in the embodiments of the present invention are explained below.

Coupling: refers to the close cooperation and mutual influence between the input and output of two or more circuit elements or electrical networks, and can transmit energy from one side to the other through interaction.

"Coupling" in the embodiment of the present invention can be used to indicate that the coupled components (such as the M feeding structures and metal grooves in the embodiment) can be coupled when the antenna unit is working; when the antenna unit is not In working condition, these components are insulated from each other.

AC signal: Refers to the signal that the direction of the current will change.

Multiple-input multiple-output (MIMO) technology: refers to a technology that uses multiple antennas at the transmission end (ie, the sending end and the receiving end) to transmit or receive signals to improve communication quality. In this technique, signals can be sent or received through multiple antennas at the transmitting end.

Relative permittivity: A physical parameter used to characterize the dielectric properties or polarization properties of dielectric materials.

Floor: refers to the part of the terminal equipment that can be used as a virtual ground. For example, a printed circuit board (printed circuit board, PCB) in the terminal device or a display screen of the terminal device.

Cellular antenna: refers to an antenna used to communicate with terminal equipment via an antenna beam with width, azimuth and downtilt in a land-based cellular communication system.

An embodiment of the present invention provides an antenna unit and a terminal device. The antenna unit may include a metal groove, M feeding parts arranged at the bottom of the metal groove, and M feeding arms arranged in the metal groove; wherein , each feeder in the M feeders is electrically connected to a feeder arm and insulated from the metal groove, and each feeder arm in the M feeder arms is connected to the bottom inner surface of the metal groove The distance between them is greater than half of the first distance, and they are all coupled to the metal groove. The first distance is the distance between the surface where the opening of the metal groove is located and the inner surface of the bottom of the metal groove, and M is a positive integer. Through this solution, since the feed arm can be coupled with the metal groove, when the feed arm receives an AC signal, the feed arm can be coupled with the metal groove, so that the metal groove can generate an induced AC signal, And then can make the feed arm and the metal groove radiate electromagnetic waves of a certain frequency; and, because the current path of the induced current generated by the coupling of the feed arm and the metal groove can have multiple (for example, from the feed arm to the metal groove to the The current path of the feed arm, the current path formed on the metal groove, etc.), so the frequency of the electromagnetic wave generated by the current on the feed arm through the metal groove can also have multiple frequencies, so that the antenna unit can cover multiple The frequency band, which can increase the frequency band covered by the antenna unit.

The antenna unit provided by the embodiment of the present invention can be applied to a terminal device, and can also be applied to other electronic devices that need to use the antenna unit, which can be determined according to actual usage requirements, and is not limited by the embodiment of the present invention. Taking the antenna unit applied to a terminal device as an example, the antenna unit provided in the embodiment of the present invention will be exemplarily described below.

The antenna unit provided by the embodiment of the present invention will be exemplarily described below with reference to various drawings.

As shown in FIG. 2 , the antenna unit 20 may include: a metal groove 201 , M feeding parts 202 arranged at the bottom of the metal groove 201 , and M feeding arms 203 arranged in the metal groove 201 .

Wherein, each feeder 202 in the above-mentioned M feeders can be electrically connected to a feeder arm, and can be insulated from the metal groove 201, and each feeder arm 203 in the M feeder arms can be connected to the metal groove 201. The distance between the bottom inner surfaces of the grooves 201 may be greater than half of the first distance and both may be coupled with the metal grooves 201, and M is a positive integer.

It should be noted that, in the embodiment of the present invention, in order to illustrate the structure of the antenna unit more clearly, FIG. 2 is an exploded view of the antenna unit, that is, it shows that the components of the antenna unit are in a separated state. In actual implementation, the above-mentioned M feeders and M feeder arms are all set in the metal groove, that is, the metal groove forms an integral body with the M feeders and the M feeder arms to form a basic The antenna unit provided by the embodiment of the invention.

In addition, the feeder 202 and the feeder arm 203 in FIG. 2 are not shown in an electrically connected state. In actual implementation, the feeder 202 may be electrically connected to the feeder arm 203 .

In the embodiment of the present invention, since the above-mentioned M feeding arms are arranged in the metal groove, in order to ensure that the antenna unit provided in the embodiment of the present invention can effectively radiate electromagnetic waves, that is, the antenna unit can effectively radiate energy, and ensure that the antenna unit Impedance matching characteristics (the impedance of the energy transmitted from the feeder to the feeder arm is 50 ohms), an appropriate distance should be maintained between the feeder arm and the inner surface of the bottom of the metal groove, that is, the above-mentioned first distance.

It should be noted that, in actual implementation, the distance between each of the above M feed arms and the inner surface of the bottom of the metal groove can also be any other possible value, which can be determined according to actual use requirements. The embodiments of the present invention are not limited.

In order to describe the antenna unit provided by the embodiment of the present invention and its working principle more clearly, an antenna unit is taken as an example below to illustrate the working principle of the antenna unit sending and receiving signals provided by the embodiment of the present invention.

Exemplarily, with reference to the above-mentioned FIG. 2, in the embodiment of the present invention, when the terminal device sends a 5G millimeter wave signal, the signal source in the terminal device sends an AC signal, and the signal source can be transmitted to the feeder arm through the feeder. Then, after the feeder arm receives the AC signal, the feeder arm can be coupled with the metal groove, so that the metal groove generates an induced AC signal, and then the metal groove can radiate electromagnetic waves of multiple frequencies to the outside (due to the feed There can be multiple current paths for the induced current generated by the coupling between the electric arm and the metal groove, such as the current path from the feed arm to the metal groove and then to the feed arm, the current path formed on the metal groove, etc. , so the frequency of the electromagnetic wave radiated by the current on the feed arm through the metal groove can also have multiple frequencies). In this way, the terminal device can transmit signals of different frequencies through the antenna unit provided by the embodiment of the present invention.

As another example, in the embodiment of the present invention, when the terminal device receives the 5G millimeter wave signal, the electromagnetic wave in the space where the terminal device is located can excite the metal groove, so that the metal groove can generate an induced current (that is, an induced alternating current Signal). After the metal groove generates the induced AC signal, the metal groove can be coupled with the feed arm, so that the feed arm generates the induced AC signal. Then, the feeder arm can input the AC signal to the receiver in the terminal device through the feeder, so that the terminal device can receive the 5G millimeter wave signal sent by other devices. That is, the terminal device can receive signals through the antenna unit provided by the embodiment of the present invention.

The performance of the antenna unit provided by the embodiment of the present invention will be exemplarily described below with reference to FIG. 3 .

Exemplarily, as shown in FIG. 3 , when the antenna unit is working according to the embodiment of the present invention, the reflection coefficient diagram of the antenna unit is shown. When the return loss is less than -6dB (decibel), the frequency range covered by the antenna unit can be 24.25GHz-41.846GHz, and this frequency range can include multiple millimeter wave frequency bands (such as n257, n258, n260 and n261); when the echo When the loss is less than -10dB, the frequency range covered by the antenna unit can be 25.4GHz-29.5GHz and 36.256-40.4GHz, and this frequency range can also include multiple main millimeter wave frequency bands (such as n257, n260 and n261). In this way, the antenna unit provided by the embodiment of the present invention can cover most of the 5G millimeter wave frequency bands (such as n257, n258, n260, n261 mainstream 5G millimeter wave frequency bands), thereby improving the antenna performance of the terminal device.

It should be noted that, in the embodiment of the present invention, when the return loss of an antenna unit is less than -6dB, the antenna unit can meet the actual use requirements; when the return loss of an antenna unit is less than -10dB, the antenna unit's The performance is even better. Point a, point b, point c and point d in the above figure 3 are used to mark the value of return loss. It can be seen from figure 3 that the value of return loss marked by point a is -6.3246, and the value of return loss marked by point b is The value of the return loss marked by point c is -10.359, the value of the return loss marked by point c is -10.087, and the value of the return loss marked by point d is -5.9607. That is, the antenna unit provided by the embodiment of the present invention can ensure better performance on the basis of meeting actual usage requirements.

An embodiment of the present invention provides an antenna unit. Since the feed arm can be coupled with the metal groove, when the feed arm receives an AC signal, the feed arm can be coupled with the metal groove, so that the metal groove can Generate an induced AC signal, which in turn can make the feed arm and the metal groove radiate electromagnetic waves of a certain frequency; and, due to the coupling of the feed arm and the metal groove, there can be multiple current paths for the induced current (for example, from the feed arm to the metal groove and then to the current path of the feed arm, the current path formed on the metal groove and other current paths), so the frequency of the electromagnetic wave generated by the current on the feed arm through the metal groove can also have multiple frequencies, so that The antenna unit covers multiple frequency bands, so that the frequency bands covered by the antenna unit can be increased.

Optionally, in the embodiment of the present invention, the above-mentioned metal groove may be a rectangular groove or a circular groove.

Of course, in actual implementation, the above-mentioned metal grooves can also be metal grooves of any other possible shape, which can be determined according to actual use requirements, and are not limited by the embodiments of the present invention.

It should be noted that, in the embodiment of the present invention, when the above-mentioned metal groove is a rectangular groove, the opening shape of the metal groove can be a rectangle; when the above-mentioned metal groove is a circular groove, the opening shape of the metal groove can be The shape of the opening may be circular.

Optionally, in the embodiment of the present invention, the shape of the cross-section of the above-mentioned metal groove can be a regular shape such as a circle, rectangle, hexagon, etc., and the shape of the cross-section of the metal groove can also be an irregular shape. It is determined according to actual usage requirements, and is not limited in the embodiments of the present invention.

In the embodiment of the present invention, since the performance of the antenna unit composed of metal grooves of different shapes may be different, it is possible to select a metal groove of a suitable shape as the antenna unit provided in the embodiment of the present invention according to the actual use requirements of the antenna unit. The metal groove allows the antenna unit to work in the 5G millimeter wave frequency band.

Further, since the shape of the antenna unit composed of regular-shaped metal grooves is relatively stable, the performance of the antenna unit provided by the embodiments of the present invention can be compared by setting the above-mentioned metal grooves as rectangular grooves or circular grooves. Stable, which can improve the performance of the antenna unit.

Optionally, in the embodiment of the present invention, the above-mentioned M power feeders 202 may penetrate through the bottom of the metal groove 201 .

Specifically, in actual implementation, as shown in FIG. 2, the first end 202a of the feeder can be electrically connected to the feeder arm 203, and the second end (not shown in FIG. 2) of the feeder can be connected to the terminal device A signal source in (for example, a 5G signal source in a terminal device) is electrically connected. In this way, the current of the signal source in the terminal device can be transmitted to the feeder arm through the feeder, and then coupled to the metal groove through the feeder arm, so that the metal groove can generate an induced current, so that the metal groove The slot radiates electromagnetic waves of a certain frequency. In this way, the antenna unit provided in the embodiment of the present invention can radiate the 5G millimeter wave signal in the terminal device.

Optionally, in this embodiment of the present invention, the feed arm in one feed structure (that is, any one of the above M feed structures) may be a symmetrically shaped feed arm. For example, the feed arms in a feed structure can be symmetrical along the horizontal direction, or can be symmetrical along the vertical direction. Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

Optionally, in this embodiment of the present invention, the feed arm in a feed structure (that is, any one of the above M feed structures) may be any of the following feed arms: rectangular feed arm, "T" shape feed arm, "Y" shape feed arm.

Of course, in actual implementation, the feed arm in the above feed structure may also be any other possible feed arm. Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

Optionally, in the embodiment of the present invention, the feed arms in the above M feed structures can be the same type of feed arms (for example, the feed arms in the M feed structures are all "Y" shaped feed arms ), or different feeding arms (for example, some of the feeding arms in the M feeding structures are "T"-shaped feeding arms, and the other part of the feeding arms are "Y"-shaped feeding arms). Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

Exemplarily, the feeding arms in the above M feeding structures may all be “T” shaped feeding arms 203 as shown in FIG. 2 , or may all be “Y” shaped feeding arms as shown in FIG. 4 203.

In the embodiment of the present invention, due to different forms (such as shape, material and structure, etc.) Different types of feed arms may have different effects on the performance of the antenna unit. Therefore, an appropriate feed arm can be selected according to the actual use requirements of the antenna unit, so that the antenna unit can work in a suitable frequency range.

Optionally, in the embodiment of the present invention, the above-mentioned M feeder arms may be four feeder arms (that is, M=4), and the four feeder arms may form two feeder arm groups, and each feeder arm The group may include two feeding arms arranged symmetrically, and the axis of symmetry of one group of feeding arms is orthogonal to the axis of symmetry of the other group of feeding arms.

Wherein, the amplitude of the signal source electrically connected to the first feeder and the signal source electrically connected to the second feeder arm are equal, and the phase difference is 180 degrees, and the first feeder and the second feeder are the same feeder The two feeder arms in the electric arm group are respectively electrically connected to the feeder parts.

In the embodiment of the present invention, since the antenna unit can include two feeding arm groups, the terminal device can respectively send signals or receive signals through the two feeding arm groups in the antenna unit, that is, the embodiment of the present invention can provide The antenna unit implements MIMO technology, so that the communication capacity and communication rate of the antenna unit can be improved, that is, the data transmission rate of the antenna unit can be increased.

It should be noted that, for the convenience of description and understanding, the above two feeder arm groups are divided into a first feeder arm group and a second feeder arm group in the following embodiments. Wherein, the first feeding arm group and the second feeding arm group respectively include two feeding arms arranged symmetrically, and the symmetry axis of the first feeding arm group is orthogonal to the symmetry axis of the second feeding arm group.

Optionally, in this embodiment of the present invention, the above-mentioned first feeding arm group and the above-mentioned second feeding arm group may be two differently polarized feeding arm groups. Specifically, the first feeding arm group may be a first-polarized feeding arm group, and the second feeding arm group may be a second-polarized feeding arm group.

Exemplarily, with reference to FIG. 2, as shown in FIG. 5, the above-mentioned first feeding arm group may include a feeding arm 2030 and a feeding arm 2031, and the above-mentioned second feeding arm group may include a feeding arm 2032 and a feeding arm 2033. Wherein, the first feeding arm group formed by the feeding arm 2030 and the feeding arm 2031 may be a first polarized feeding arm group (for example, a +45° polarized feeding arm group); the feeding arm 2032 and the feeding arm group The second feeding arm group formed by the electric arm 2033 may be a second polarized feeding arm group (for example, a −45° polarized feeding arm group).

Optionally, in this embodiment of the present invention, the foregoing first polarization and the second polarization may be polarizations in different directions.

Exemplarily, the first polarization may be +45° polarization or horizontal polarization; the second polarization may be -45° polarization or vertical polarization.

Of course, in actual implementation, the above-mentioned first polarization and second polarization may also be any other possible polarization forms. Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

In the embodiment of the present invention, since the above-mentioned first feed arm group and the above-mentioned second feed arm group can be feed arm groups with two different polarizations (first polarization and second polarization), it is possible to make this The antenna unit provided by the embodiment of the invention can form a dual-polarized antenna unit, so that the wireless connection capability of the antenna unit can be improved, thereby reducing the probability of communication disconnection of the antenna unit, that is, the communication capability of the antenna unit can be improved.

Optionally, in this embodiment of the present invention, for the two feed arms in the first feed arm group, the amplitudes of the signal sources electrically connected to the two feed arms and the two feed parts may be equal, In addition, the phases of the signal sources electrically connected to the two power feeding parts electrically connected to the two power feeding arms may differ by 180 degrees.

Correspondingly, for the two feed arms in the second feed arm group, the amplitudes of the signal sources electrically connected to the two feed parts electrically connected to the two feed arms can be equal, and can be The phases of the signal sources electrically connected to the two feeders electrically connected to the electric arms may differ by 180 degrees.

In the embodiment of the present invention, when one feeding arm in the first feeding arm group is in the working state, the other feeding arm in the first feeding arm group may also be in the working state. Correspondingly, when one feeding arm in the second feeding arm group is in the working state, the other feeding arm in the second feeding arm group may also be in the working state. That is, the feed arms in the same feed arm group can work simultaneously.

Optionally, in this embodiment of the present invention, when the feeding arms in the first feeding arm group are in the working state, the feeding arms in the second feeding arm group may or may not be in the working state. Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

In the embodiment of the present invention, since the data transmission rate of the antenna unit using the differential orthogonal feeding method is relatively high, it is possible to distribute the above-mentioned first feeding arm group and the second feeding arm group The amplitude of the signal source connected to the first feeding part is equal to that of the signal source connected to the second feeding part, and the phase difference is 180 degrees, so that the feeding method adopted by the antenna unit provided by the embodiment of the present invention is a differential quadrature feed In this way, the data transmission rate of the antenna unit can be further improved, that is, the communication capacity and communication rate of the antenna unit can be further improved.

Optionally, in the embodiment of the present invention, the above two feeding arm groups may be located on the same plane, and the feeding arms in any one feeding arm group may be distributed on the symmetry axis of the other feeding arm group.

It can be understood that, in the case that the above two feed arm groups are located on the same plane, the distances between the feed arms in the two feed arm groups and the inner surface of the bottom of the metal groove are equal.

Exemplarily, as shown in FIG. 5 , both the first feeding arm group and the second feeding arm group are located on the first plane S1, that is, the feeding arm 2030 and the feeding arm 2031 in the first feeding arm group are located on On the first plane S1, the feeding arm 2032 and the feeding arm 2033 in the second feeding arm group are also located on the first plane S1. And as shown in FIG. 5 , the feed arm 2030 and the feed arm 2031 in the first feed arm group are located on the symmetry axis (ie, the first symmetry axis) L1 of the second feed arm group, and the second feed arm group The feeding arm 2032 and the feeding arm 2033 in the group are located on the symmetry axis (ie, the second symmetry axis) L2 of the first feeding arm group. Optionally, in the embodiment of the present invention, the feeding arms in the above M feeding structures may all be located on the same plane.

In the embodiment of the present invention, since the distance between the feed arm and the bottom inner surface of the metal groove among the above-mentioned M feed arms is equal, it is easy to control the distance between the M feed arms and the target metal groove. Coupling parameters, such as the induced current generated during the coupling process, etc. Therefore, by setting the above two feeder arm groups on the same plane, the distance between the feeder arms in different feeder arm groups and the inner surface of the bottom of the metal groove The distances between them are equal, which is convenient for controlling the working state of the antenna unit provided by the embodiment of the present invention.

Optionally, in the embodiment of the present invention, the above-mentioned metal groove may be a rectangular groove, and the above-mentioned two feeder arm groups may include a first feeder arm group and a second feeder arm group, and the first feeder arm group The feed arms in the second feed arm group may be distributed on the first diagonal of the metal groove, and the feed arms in the second feed arm group may be distributed on the second diagonal of the metal groove.

Optionally, in the embodiment of the present invention, the above-mentioned first diagonal line and the above-mentioned second diagonal line may be two diagonal lines in a section of the metal groove parallel to the surface where the opening of the metal groove is located.

In the embodiment of the present invention, the feeder parts electrically connected to the feeder arms in the first feeder arm group may be distributed on the third diagonal of the metal groove, and connected to the feeder arms in the second feeder arm group The electrically connected power feeds may be distributed on the fourth diagonal of the metal groove. Wherein, the third diagonal line may be parallel to the above-mentioned first diagonal line, and the fourth diagonal line may be parallel to the above-mentioned second diagonal line.

Exemplarily, as shown in FIG. 6 , it is a top view of the antenna unit provided by the embodiment of the present invention on the opposite side of the Z axis (for example, the coordinate system shown in FIG. 2 ). It can be seen from FIG. 6 that the opening shape of the metal groove 201 is rectangular (that is, the metal groove is a rectangular groove), and the above-mentioned M feed arms are arranged in the metal groove 201 . Wherein, the feed arm 2030 and the feed arm 2031 can be distributed on a diagonal (namely the first diagonal) L3 of the metal groove 201, and the feed arm 2032 and the feed arm 2033 can be distributed on the metal groove 201 On the other diagonal (that is, the second diagonal) of L4.

It should be noted that, since FIG. 6 is a top view of the antenna unit provided by the embodiment of the present invention in the reverse direction of the Z axis, the coordinate system shown in FIG. 6 only shows the X axis and the Y axis.

In addition, since the above M feeding arms are arranged in the metal groove, 201 in FIG. 6 indicates the edge of the opening of the metal groove to indicate that the feeding arm 203 is arranged in the opening of the metal groove 201 .

In the embodiment of the present invention, since the diagonal line is the longest line in the metal groove when the metal groove is a rectangular groove, by setting the feed arm in the above two feed arm groups on the metal On the diagonals of the groove (that is, the first diagonal and the second diagonal), the induced current generated by the coupling between each feed arm group in the two feed arm groups and the above metal groove can be increased The number of current paths can increase the frequency range covered by the antenna unit provided by the embodiment of the present invention, and further improve the performance of the antenna unit.

Further, by arranging the feed arms in the above two feed arm groups on the diagonal of the metal groove, the coupling between each feed arm group in the two feed arm groups and the above metal groove can be increased Therefore, when the frequency range covered by the antenna unit is constant, the volume of the antenna unit provided by the embodiment of the present invention can be reduced to a certain extent.

Optionally, in this embodiment of the present invention, the antenna unit may further include a first insulator disposed in the metal groove, and the first insulator may carry the M feed arms.

Wherein, for each of the above-mentioned M power feeders, the feeder passing through the first insulator may be electrically connected to one feeder arm respectively.

Optionally, in the embodiment of the present invention, the M feed arms may be carried on the first insulator, or may be carried in the first insulator. Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

Exemplarily, as shown in FIG. 7 , it is a cross-sectional view of an antenna unit provided by an embodiment of the present invention. In FIG. 7 , the antenna unit may further include a first insulator 204 disposed in the metal groove 201 . Wherein, M feeding arms 203 are carried in the first insulator 204; for each feeding part 202 in the above M feeding parts, the first end of the feeding part can pass through the first insulator 204 and the feeding arm 203 is electrically connected.

In addition, it can be seen from FIG. 7 that the distance a1 between the feeding arm 203 and the inner surface of the bottom of the metal groove 201 (abbreviated as distance 1) a1 is greater than the distance between the opening surface of the metal groove 201 and the inner surface of the bottom of the metal groove 201 ( It is referred to as one-half of the distance 2) a2.

Optionally, in the embodiment of the present invention, the cross-sectional shape of the above-mentioned first insulator may be the same as the opening shape of the metal groove, such as any possible shape such as rectangle or circle.

It should be noted that, in the embodiment of the present invention, the shape of the above-mentioned first insulator may also be any shape that can meet actual use requirements. Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

Optionally, in the embodiment of the present invention, the material of the above-mentioned first insulator may be any possible material such as plastic or foam. Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

Optionally, in the embodiment of the present invention, the material of the above-mentioned first insulator may be an insulating material with relatively small relative permittivity and loss tangent.

Exemplarily, in the embodiment of the present invention, the relative permittivity of the material of the above-mentioned first insulator may be 2.53, and the loss tangent value may be 0.003.

In the embodiment of the present invention, the above-mentioned first insulator can not only carry the above-mentioned M feed arms, but also isolate the M feed arms and the metal groove, thereby preventing the occurrence of a problem between the M feed arms and the metal groove. interference.

It should be noted that, in the embodiment of the present invention, on the premise of supporting the above-mentioned M feeding arms, the smaller the loss tangent value of the material of the first insulator, the smaller the influence of the first insulator on the radiation effect of the antenna unit. That is to say, the smaller the loss tangent value of the material of the first insulator, the smaller the impact of the first insulator on the performance of the antenna unit, and the better the radiation effect of the antenna unit.

Optionally, in the embodiment of the present invention, in the case where the above-mentioned M feeding arms are carried on the first insulator, the antenna unit may further include a second insulator disposed in the metal groove, and the second insulator may be disposed on The first side of the first insulator may be the side of the first insulator where the M feed arms are located.

In the embodiment of the present invention, when the above-mentioned M feed arms are carried on the first insulator, the M feed arms may be exposed to the air, so that other external objects may affect the M feed arms interfere. In this way, by arranging the above-mentioned second insulator on the first side of the first insulator, the external interference to the M feeder arms can be reduced.

Exemplarily, referring to FIG. 2 , as shown in FIG. 8 , the above M feed arms 203 are carried on the first insulator 204 , and the second insulator 205 may be disposed on the first side B1 of the first insulator 204 .

It should be noted that, in the embodiment of the present invention, in order to illustrate the structure of the antenna unit more clearly, FIG. 8 is an exploded view of the antenna unit, that is, it shows that the components of the antenna unit are in a separated state. In actual implementation, both the first insulator and the second insulator are disposed in the metal groove, and the second insulator is in contact with the first side of the first insulator.

Optionally, in the embodiment of the present invention, when the above-mentioned M feed arms are carried on the first insulator, and the second insulator is in contact with the first side of the first insulator, the M feed arms may be embedded in the second insulator middle.

Optionally, in the embodiment of the present invention, the cross-sectional shape of the second insulator may be the same as the opening shape of the metal groove, such as any possible shape such as rectangle or circle.

Of course, in actual implementation, the cross-sectional shape of the second insulator may be any other possible shape, which may be determined according to actual use requirements, and is not limited by the embodiment of the present invention.

Optionally, in the embodiment of the present invention, the material of the above-mentioned second insulator may be the same as that of the above-mentioned first insulator.

Optionally, in the embodiment of the present invention, the material of the second insulator may be any possible material such as plastic or foam. Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

Optionally, in the embodiment of the present invention, the material of the above-mentioned second insulator may be an insulating material with relatively small relative permittivity and loss tangent.

Exemplarily, in the embodiment of the present invention, the relative permittivity of the material of the second insulator may be 2.5, and the loss tangent value may be 0.001.

It should be noted that, in the embodiment of the present invention, under the premise of isolating the feed arm in the above-mentioned M feed structures from the outside world, the smaller the loss tangent value of the material of the second insulator, the greater the effect of the second insulator on the antenna unit. Radiation effects are less affected. That is to say, the smaller the loss tangent value of the material of the second insulator, the smaller the influence of the second insulator on the working performance of the antenna unit, and the better the radiation effect of the antenna unit.

Optionally, in this embodiment of the present invention, as shown in FIG. 7 , the second insulator 205 may be flush with the surface where the opening of the metal groove 201 is located.

Of course, in actual implementation, the thickness of the above-mentioned second insulator may also be any other possible thickness, which may be determined according to actual use requirements, and is not limited in the embodiment of the present invention.

In the embodiment of the present invention, due to the different thickness of the second insulator, the performance of the antenna unit may also be different. Therefore, the thickness of the second insulator can be set according to actual usage requirements, thereby making the design of the antenna unit more flexible.

Further, when the second insulator is flush with the surface where the opening of the metal groove is located, the outer surface of the antenna unit provided by the embodiment of the present invention can be relatively flat, so that the outer surface of the antenna unit can be more beautiful.

Optionally, in the embodiment of the present invention, as shown in FIG. 7 , the bottom of the metal groove 201 may also be provided with M through holes 206 penetrating the bottom of the metal groove 201, and each of the above-mentioned M power feeders The portions 202 may be respectively provided in one through hole 206 .

Optionally, in the embodiment of the present invention, the above M through holes may be through holes with the same diameter.

Optionally, in the embodiment of the present invention, the above M through holes may be distributed on a diagonal line of the metal groove. Wherein, the specific distribution manner of the M through holes in the metal groove can be determined according to the distribution positions of the M feed arms in the metal groove.

In the embodiment of the present invention, since it is relatively simple to set a through hole in the metal groove, it is easy to realize, so it is possible to set a through hole penetrating through the bottom of the metal groove at the bottom of the above metal groove, and arrange the power feeding part in the through hole The method simplifies the process of the feeder penetrating through the metal groove.

Optionally, in this embodiment of the present invention, a third insulator may be disposed in each of the above M through holes, and the third insulator may wrap the power feeding part disposed in the through hole.

In the embodiment of the present invention, the above-mentioned third insulator wraps the power feeding part disposed in the through hole, so that the power feeding part can be fixed in the through hole.

Exemplarily, as shown in FIG. 7 , a through hole 206 is provided at the bottom of the metal groove 201 , and a third insulator 207 is provided in each through hole 206 , and the power feeder 202 can pass through the third insulator provided in the through hole 206 207 is electrically connected to the feeding arm 203 .

It should be noted that, in FIG. 7 , the signal source 30 electrically connected to one end of the feeder 202 (for example, the second end of the feeder) may be a millimeter wave signal source in a terminal device.

In the embodiment of the present invention, the material of the third insulator may be an insulating material with a relatively small relative permittivity.

Exemplarily, the material of the above-mentioned third insulator may be any possible material such as foam material or plastic material.

Optionally, in the embodiment of the present invention, the third insulator may be the same insulating material as that of the first insulator, or may be a different insulating material. Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

In the embodiment of the present invention, the third insulator, the feeder, and the through hole in the metal groove jointly constitute a coaxial transmission structure with a characteristic impedance of 50 ohms. On the one hand, since the diameter of the through hole is larger than the feeder The diameter of the power part, so when the power feed part in the feed structure is set in the through hole, the power feed part in the feed structure may not be fixed in the through hole, so by setting the above-mentioned third in the through hole The insulator, and the way the third insulator is wrapped around the feeder part in the feeder structure can make the feeder part in the feeder structure be fixed in the through hole. On the other hand, since both the metal groove and the feed part in the feed structure are made of metal, there may be interference between the two during the operation of the antenna unit. Therefore, the above-mentioned third The feeding part in the feeding structure is isolated from the metal groove by means of an insulator, so that the feeding part in the feeding structure is insulated from the metal groove, so that the performance of the antenna of the terminal device can be made more stable.

It should be noted that, in the embodiment of the present invention, the antenna units shown in the above-mentioned drawings are all described in conjunction with one drawing in the embodiment of the present invention as an example. During specific implementation, the antenna units shown in the above-mentioned figures can also be implemented in combination with any other figures shown in the above-mentioned embodiments that can be combined, which will not be repeated here.

An embodiment of the present invention provides a terminal device, and the terminal device may include the antenna unit provided in any one of the above embodiments in FIG. 2 to FIG. 8 . For the description of the antenna unit, reference may be made to the related description of the antenna unit in the foregoing embodiments, which will not be repeated here.

The terminal device in the embodiment of the present invention may be a mobile terminal or a non-mobile terminal. Exemplarily, the mobile terminal may be a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a vehicle terminal, a wearable device, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a netbook or a personal digital assistant (personal digital assistant, PDA) ), etc., the non-mobile terminal may be a personal computer (personal computer, PC) or a television (television, TV), etc., which are not specifically limited in this embodiment of the present invention.

Optionally, in this embodiment of the present invention, at least one first groove may be disposed in the casing of the terminal device, and each antenna unit may be disposed in one first groove.

In this embodiment of the present invention, at least one first groove can be provided in the casing of the terminal device, and the antenna unit provided by the embodiment of the present invention is arranged in the first groove, so as to integrate at least one An antenna unit provided by an embodiment of the present invention.

Optionally, in this embodiment of the present invention, the foregoing first groove may be disposed in a frame of a housing of the terminal device.

In the embodiment of the present invention, as shown in FIG. 9 , the terminal device 4 may include a casing 40 . The housing 40 may include a first metal frame 41, a second metal frame 42 connected to the first metal frame 41, a third metal frame 43 connected to the second metal frame 42, and a third metal frame 43 and the first metal frame 41 are connected to the fourth metal frame 44. The terminal device 4 may also include a floor 45 connected to both the second metal frame 42 and the fourth metal frame 44, and a floor 45 arranged on the third metal frame 43, part of the second metal frame 42 and part of the fourth metal frame 44. The first antenna 46 in the area (specifically, these metal frames may also be a part of the first antenna). Wherein, the second metal frame 42 is provided with a first groove 47 . In this way, the antenna unit provided by the embodiment of the present invention can be placed in the first groove, so that the terminal device can include the array antenna module formed by the antenna unit provided by the embodiment of the present invention, and then the cost can be integrated in the terminal device. The design of the antenna unit provided by the embodiment of the invention.

In the embodiment of the present invention, the above-mentioned floor may be a PCB or a metal middle frame in the terminal device, or any part that can be used as a virtual ground such as a display screen of the terminal device.

It should be noted that, in the embodiment of the present invention, the above-mentioned first antenna may be the second-generation mobile communication system (ie, 2G system), the third-generation mobile communication system (ie, 3G system), and the fourth-generation mobile communication system of the terminal device. Communication antennas for systems such as 4G systems. The antenna unit integrated in the terminal device in the embodiment of the present invention (the antenna unit formed by the metal groove and the M feed structures located in the metal groove and the first insulator) can be the 5G system of the terminal device. antenna.

Optionally, in the embodiment of the present invention, the first metal frame, the second metal frame, the third metal frame and the fourth metal frame may be sequentially connected end to end to form a closed frame; or, the first metal frame, the second metal frame Part of the frame, the third metal frame and the fourth metal frame can be connected to form a semi-closed frame; or, the above-mentioned first metal frame, second metal frame, third metal frame and fourth metal frame can be formed without connecting each other Open border. Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

It should be noted that the frame included in the casing 40 shown in FIG. 9 is a closed frame formed by sequentially connecting the first metal frame 41 , the second metal frame 42 , the third metal frame 43 and the fourth metal frame 44 end to end. It is used as an example for illustration and does not impose any limitation on the embodiment of the present invention. For frames formed by other connection methods (partial frame connections or individual frames not connected to each other) among the above-mentioned first metal frame, second metal frame, third metal frame, and fourth metal frame, the implementation method is the same as that of the embodiment of the present invention. The provided implementation methods are similar, and will not be repeated here to avoid repetition.

Optionally, in the embodiment of the present invention, the above at least one first groove may be set in the same frame of the housing, or in different frames. Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

Optionally, in this embodiment of the present invention, multiple first grooves may be provided on the housing of the terminal device, so that multiple antenna units provided by this embodiment of the present invention may be provided in the terminal device, so that the terminal device may Multiple antenna elements are included to enhance the antenna performance of the end device.

In the embodiment of the present invention, when multiple antenna units are provided in the terminal device, according to the structure of the antenna unit, the distance between two adjacent first grooves can be reduced, that is, the distance between two adjacent antenna units can be reduced In this way, when the terminal device includes a small number of antenna units, the scanning angle of the beam of the electromagnetic wave generated by the feed arm and the metal groove in the antenna unit can be increased, thereby increasing the communication efficiency of the millimeter-wave antenna of the terminal device. coverage.

In the embodiment of the present invention, at least one first groove can be provided on the shell of the terminal device, and an antenna unit provided by the embodiment of the present invention can be arranged in each first groove, so that the terminal device can integrate An antenna unit provided by at least one embodiment of the present invention is used to improve antenna performance of a terminal device.

Optionally, in this embodiment of the present invention, the metal groove in the foregoing antenna unit may be a part of the casing of the terminal device. It can be understood that the metal groove may be a groove provided on the housing of the terminal device.

Optionally, in this embodiment of the present invention, the housing of the terminal device may be a radiator of a cellular antenna in the terminal device and/or a radiator of a non-cellular antenna in the terminal device. Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

Optionally, in this embodiment of the present invention, the foregoing metal groove may be disposed on a metal frame of a housing of the terminal device.

Exemplarily, as shown in FIG. 10 , at least one metal groove 201 may be provided in the casing 40 of the terminal device 4 provided by the embodiment of the present invention, and the M feeding arms and M feeding parts included in the antenna unit may be It is arranged in the metal groove (actually, the metal groove is not visible from the perspective of the terminal device illustrated in FIG. 10 ).

Optionally, in this embodiment of the present invention, a metal groove may be provided in any one of the first metal frame, the second metal frame, the third metal frame, and the fourth metal frame of the casing. Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

It can be understood that, in the case that the above-mentioned metal groove is arranged on the frame of the casing (such as the above-mentioned first metal frame, etc.), the metal groove structure in the embodiment of the present invention includes the side wall of the metal groove, the metal groove Parts such as the bottom are part of the terminal device, and specifically may be part of the frame of the housing provided in the embodiment of the present invention.

Optionally, in this embodiment of the present invention, the housing of the terminal device may also serve as a radiator of the non-millimeter-wave antenna in the terminal device, so that the space occupied by the antenna in the terminal device can be greatly reduced.

It should be noted that, in the embodiment of the present invention, in the above-mentioned FIG. 10 , the above-mentioned metal groove 201 is arranged on the first metal frame 41 of the casing 40, and the opening direction of the metal groove 201 is as shown in FIG. 10 The positive direction of the Z axis of the coordinate system is taken as an example for illustration.

It can be understood that in the embodiment of the present invention, as shown in FIG. 10 , when the above-mentioned metal groove is arranged in the second metal frame of the housing, the opening direction of the metal groove can be the positive direction of the X axis; when the above-mentioned metal groove When it is arranged on the third metal frame of the housing, the opening direction of the metal groove can be Z-axis reverse; when the above-mentioned metal groove is arranged on the fourth metal frame of the housing, the opening direction of the metal groove can be The X axis is reversed.

Optionally, in the embodiment of the present invention, a plurality of metal grooves may be provided in the casing of the terminal device, and M feed arms and M feed parts in the embodiment of the present invention may be arranged in each metal groove and other components, so that multiple antenna units provided by the embodiments of the present invention can be integrated in the terminal device, so that these antenna units can form an antenna array, thereby improving the antenna performance of the terminal device.

In the embodiment of the present invention, as shown in FIG. 11 , when the antenna unit radiates a signal with a frequency of 28 GHz (that is, the antenna unit radiates a low-frequency signal), the radiation pattern of the antenna unit is as shown in FIG. 12 . When the antenna unit radiates a signal with a frequency of 39 GHz (that is, the antenna unit radiates a high-frequency signal), the radiation pattern of the antenna unit is provided for the embodiment of the present invention. It can be seen from Figure 11 and Figure 12 that the maximum radiation direction when the antenna unit radiates high-frequency signals is the same as the maximum radiation direction when the antenna unit radiates low-frequency signals, so the antenna unit provided by the embodiment of the present invention is suitable for forming an antenna array. In this way, the terminal device can be provided with at least two metal grooves, and the above-mentioned M feed arms and M feed parts and other components can be arranged in each metal groove, so that the terminal device includes multiple embodiments of the present invention The antenna unit is provided so that the terminal device includes an antenna array composed of the antenna unit, thereby improving the performance of the antenna of the terminal device.

Optionally, in this embodiment of the present invention, when multiple antenna units provided by the embodiments of the present invention are integrated in a terminal device, the distance between two adjacent antenna units (that is, the distance between two adjacent metal grooves The distance between the antenna units) can be determined according to the isolation of the antenna units and the scanning angle of the antenna array formed by the plurality of antenna units. Specifically, it may be determined according to actual usage requirements, and is not limited in this embodiment of the present invention.

Optionally, in this embodiment of the present invention, the number of metal grooves provided in the housing of the terminal device may be determined according to the size of the metal grooves and the size of the housing of the terminal device, which is not limited in this embodiment of the present invention.

Exemplarily, as shown in FIG. 13 , it is a bottom view of a plurality of antenna units disposed on a housing provided in an embodiment of the present invention in the positive direction of the Z axis (the coordinate system shown in FIG. 10 ). Assuming that the metal groove is a rectangular groove, the number of feed arms and feed parts is 4 (that is, M=4), as shown in Figure 13, the third metal frame 43 is provided with multiple antenna units (each antenna unit is formed by a metal groove 201 on the casing and 4 feeding arms 203 and 4 feeding parts (not shown in FIG. 13 ) located in the metal groove).

It should be noted that, in the embodiment of the present invention, the above-mentioned FIG. 13 exemplifies four antenna units arranged on the third metal frame for illustration, which does not limit the embodiment of the present invention in any way. It can be understood that, during specific implementation, the number of antenna units disposed on the third metal frame may be determined according to actual usage requirements, which is not limited in this embodiment of the present invention.

An embodiment of the present invention provides a terminal device, where the terminal device includes an antenna unit. The antenna unit may include a metal groove, M feeding parts arranged at the bottom of the metal groove, and M feeding arms arranged in the metal groove; wherein, among the M feeding parts Each feeder part is electrically connected to one feeder arm and insulated from the metal groove, and the distance between each feeder arm of the M feeder arms and the bottom inner surface of the metal groove is greater than the first distance One-half of all of them are coupled with the metal groove, the first distance is the distance between the surface where the opening of the metal groove is located and the inner surface of the bottom of the metal groove, and M is a positive integer. Through this solution, since the feed arm can be coupled with the metal groove, when the feed arm receives an AC signal, the feed arm can be coupled with the metal groove, so that the metal groove can generate an induced AC signal, And then can make the feed arm and the metal groove radiate electromagnetic waves of a certain frequency; and, because the current path of the induced current generated by the coupling of the feed arm and the metal groove can have multiple (for example, from the feed arm to the metal groove to the The current path of the feed arm, the current path formed on the metal groove, etc.), so the frequency of the electromagnetic wave generated by the current on the feed arm through the metal groove can also have multiple frequencies, so that the antenna unit can cover multiple The frequency band, which can increase the frequency band covered by the antenna unit.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Under the inspiration of this application, without departing from the purpose of this application and the scope of protection of the claims, many forms can also be made, all of which belong to the protection of this application.

Claims (12)

1. An antenna unit, characterized in that, the antenna unit comprises: a metal groove, M feeding parts arranged at the bottom of the metal groove, and M feeding parts arranged in the metal groove arm; Wherein, each feeder in the M feeders is electrically connected to a feeder arm and insulated from the metal groove, and each feeder in the M feeder arms is connected to the The distance between the inner surface of the bottom of the metal groove is greater than half of the first distance, and they are all coupled with the metal groove. The first distance is the surface where the opening of the metal groove is located and the metal groove. The distance between the inner surfaces of the groove bottom, M is a positive integer. 2. The antenna unit according to claim 1, wherein the metal groove is a rectangular groove or a circular groove. 3 . The antenna unit according to claim 1 , wherein the M feeding parts penetrate through the bottom of the metal groove. 4 . 4. The antenna unit according to claim 1, wherein the M feeding arms are four feeding arms, and the four feeding arms form two feeding arm groups, each feeding arm The group includes two feeder arms arranged symmetrically, and the symmetry axis of one feeder arm group is orthogonal to the symmetry axis of the other feeder arm group; Wherein, the amplitude of the signal source electrically connected to the first power feeding part and the signal source electrically connected to the second power feeding part are equal, and the phase difference is 180 degrees, and the first power feeding part and the second power feeding part It is a feeder part electrically connected to two feeder arms in the same feeder arm group respectively. 5. The antenna unit according to claim 4, wherein the two feeding arm groups are located on the same plane, and the feeding arms in any one feeding arm group are distributed in the other feeding arm group. on the axis of symmetry. 6. The antenna unit according to claim 4, wherein the metal groove is a rectangular groove, and the two feeding arm groups include a first feeding arm group and a second feeding arm group, so The feed arms in the first feed arm group are distributed on the first diagonal of the metal groove, and the feed arms in the second feed arm group are distributed on the second diagonal of the metal groove. on the diagonal. 7. The antenna unit according to claim 1, wherein the antenna unit further comprises a first insulator disposed in the metal groove, the first insulator carrying the M feeding arms; Wherein, for each feeder, the feeder passing through the first insulator is electrically connected to a feeder arm respectively. 8. The antenna unit according to claim 7, wherein the M feeding arms are carried on the first insulator; The antenna unit further includes a second insulator disposed in the metal groove, the second insulator is disposed on a first side of the first insulator, and the first side is in the first insulator, the The side where the M feed arms are located. 9. The antenna unit according to claim 8, wherein the second insulator is flush with the surface where the opening of the metal groove is located. 10. A terminal device, characterized in that the terminal device comprises at least one antenna unit according to any one of claims 1-9. 11. The terminal device according to claim 10, wherein at least one first groove is disposed in the casing of the terminal device, and each antenna unit is disposed in one first groove. 12. The terminal device according to claim 10, wherein the metal groove in the antenna unit is a part of the housing of the terminal device.