CN115548671B

CN115548671B - Antenna and terminal

Info

Publication number: CN115548671B
Application number: CN202211116165.6A
Authority: CN
Inventors: 孙乔; 李堃; 叶茂; 呼延思雷; 王毅
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2023-10-27
Anticipated expiration: 2040-07-21
Also published as: CN113964519A; CN115548671A; CN113964519B

Abstract

The embodiment of the application provides an antenna and a terminal, relates to the technical field of wireless communication, and can improve the adverse effect of a hand holding state on antenna efficiency. The antenna comprises: a radiator including a first portion between a first ground point and a second ground point, the first portion having a feeding point disposed thereon; the radiator further comprises a second portion located between the first ground point and the third ground point, the second portion forming a path from the first ground point to the third ground point; the first grounding point, the second grounding point and the third grounding point are all grounded. The second part is a complete conducting structure between the first grounding point and the third grounding point, so that the second part is grounded through the first grounding point and returns to the ground at the third grounding point to form a closed loop, and adverse effects of the holding state on antenna efficiency are reduced.

Description

Antenna and terminal

The application is a division of China patent application filed for China State intellectual property office, application number 202010707312.1 and application name antenna and terminal at 21 st of 07 th 2020, and the whole content of the application is contained in the mother case.

Technical Field

The present application relates to the field of wireless communications technologies, and in particular, to an antenna and a terminal.

Background

The development trend of terminals such as mobile phones is that the screen occupation ratio is higher and higher, and the number of cameras is more and more, so that the available space in the mobile phones is smaller and smaller, meanwhile, along with the development of communication technology, the frequency bands required by the mobile phones are more and more, and more antennas are required to be arranged to support more frequency bands. Therefore, the headroom of the antenna in the mobile phone is smaller and smaller, which results in greater influence of the human body on the antenna, for example, in some hand-held states, which results in a significant decrease in antenna efficiency.

Disclosure of Invention

The technical scheme of the application provides an antenna and a terminal, which can improve the adverse effect of the hand holding state on the antenna efficiency.

In a first aspect, the present application provides an antenna, including: a radiator including a first portion between a first ground point and a second ground point, the first portion having a feeding point disposed thereon; the radiator further comprises a second portion located between the first ground point and the third ground point, the second portion forming a path from the first ground point to the third ground point; the first grounding point, the second grounding point and the third grounding point are all grounded. The second part is a complete conducting structure between the first grounding point and the third grounding point, so that the second part is grounded through the first grounding point and returns to the ground at the third grounding point to form a closed loop, and adverse effects of the holding state on antenna efficiency are reduced.

Optionally, the radiator further comprises a third portion between the second ground point and a fourth ground point, the third portion forming a path from the second ground point to the fourth ground point, the fourth ground point being grounded.

Optionally, the first portion forms a path from the first ground point to the second ground point.

Optionally, the first portion has a slot therein, the first portion being divided by the slot into a first sub-portion and a second sub-portion, the first sub-portion extending from the first ground point to one side of the slot and the second sub-portion extending from the second ground point to the other side of the slot.

Optionally, the antenna further comprises: and the feeding part is electrically connected to the feeding point of the first part, or the feeding part is connected to the feeding point of the first part through capacitive coupling.

Optionally, at least one of the ground points is grounded by a matching adjustment device, so that the antenna covers different frequencies by adjusting the matching adjustment device.

Optionally, at least one ground point of the antenna is grounded through capacitance or inductance to achieve impedance matching.

Optionally, the radiator has a strip-shaped structure.

In a second aspect, the present application further provides a terminal, including the antenna.

Optionally, the terminal further includes: a battery, a battery cover and a terminal bracket; the radiator in the antenna is a main radiator, and the main radiator is positioned at one side of the battery; the battery cover or the terminal bracket is also provided with an auxiliary radiator.

According to the antenna and the terminal provided by the embodiment of the application, the radiator is provided with the closed loop from the ground to the ground, so that the adverse effect of the hand holding state on the antenna efficiency is improved; in addition, compared with the prior art, the embodiment of the application reduces the number of the gaps on the antenna radiator, thereby being beneficial to improving the strength.

Drawings

FIGS. 1 a-1 d are schematic diagrams of four antenna structures in the prior art;

fig. 2 is a schematic diagram of the layout position of an optimal antenna in two holding states in the prior art;

fig. 3a to 3c are schematic diagrams of three antenna structures according to an embodiment of the present application;

fig. 4 is a schematic diagram of the position of the antenna when performing efficiency simulation;

FIG. 5a is a graph of S-parameters for the antenna simulation of FIG. 3 a;

FIG. 5b is a graph of efficiency of the antenna simulation of FIG. 3;

FIG. 6a is a schematic diagram showing a current distribution of the antenna shown in FIG. 3a in a first resonant mode;

FIG. 6b is a schematic diagram showing the electric field distribution of the antenna shown in FIG. 3a in a first resonant mode;

FIG. 6c is a schematic diagram showing the current distribution of the antenna shown in FIG. 3a in a second resonant mode;

FIG. 6d is a schematic diagram showing the electric field distribution of the antenna shown in FIG. 3a in a second resonant mode;

FIG. 6e is a schematic diagram showing the current distribution of the antenna shown in FIG. 3a in a third resonant mode;

FIG. 6f is a schematic diagram showing the electric field distribution of the antenna shown in FIG. 3a in a third resonant mode;

FIG. 6g is a schematic diagram showing the current distribution of the antenna shown in FIG. 3a in a fourth resonant mode;

FIG. 6h is a schematic diagram showing the electric field distribution of the antenna shown in FIG. 3a in a fourth resonant mode;

fig. 7a to 7d are schematic diagrams of another four antenna structures according to an embodiment of the present application;

FIG. 8a is a graph of S-parameters for the antenna simulation of FIG. 7 a;

FIG. 8b is a graph of S-parameters for the antenna simulation of FIG. 7 b;

fig. 9a to 9c are schematic diagrams of three other antenna structures according to an embodiment of the present application;

fig. 10 is a graph of S-parameters simulated for the antenna of fig. 9a in different band adjustment conditions;

fig. 11 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 12a to 12c are schematic views of three antenna structures in fig. 11.

Detailed Description

The terminology used in the description of the embodiments of the application herein is for the purpose of describing particular embodiments of the application only and is not intended to be limiting of the application.

Before describing the embodiments of the present application, first, the problems of the prior art and the procedure of the embodiments of the present application will be described, and as shown in fig. 1a to 1d, fig. 1a to 1d are schematic diagrams of four antenna structures in the prior art, in each structure, a radiator 1 has a grounding point 11 and a feeding point 12, wherein the grounding point 11 is used for grounding, the feeding point 12 is used for feeding, an arrow points in the drawing as a feeding direction, a gap is provided between any two adjacent grounding points 11, and the structure shown in fig. 1a and the structure shown in fig. 1b are different in the position of the feeding point 12, wherein each radiator 1 has three grounding points 11, and the structure shown in fig. 1c and the structure shown in fig. 1d have only two grounding points 11. However, the conventional antenna structure has a large difference in efficiency in different holding states of a human body, as shown in fig. 2, fig. 2 is a schematic diagram of an optimal antenna layout position in two holding states in the prior art, an antenna is disposed in a terminal, and a battery is included in the terminal, fig. 2 illustrates an optimal antenna layout position in a two-hand holding state, that is, when the antenna is disposed at both sides of the battery in the two-hand holding state, a high antenna efficiency is provided, that is, when the antenna is disposed at the upper side of the battery in the one-hand holding state, and a large difference between the antenna efficiencies is provided in the two different holding states.

TABLE 1

For example, table 1 is a result of simulation of antenna efficiency difference in the prior art, the data in the table is an antenna efficiency difference value, the antenna efficiency difference value is a difference value between antenna efficiency in a holding state and antenna efficiency in an unclamped state, wherein a negative value indicates that antenna efficiency in the holding state is reduced relative to that in the unclamped state, a third row indicates an efficiency difference value in a different holding state when the antenna works in the N41 frequency band, a fourth row indicates an efficiency difference value in a different holding state when the antenna works in the N77 frequency band, a fifth row indicates an efficiency difference value in a different holding state when the antenna works in the N79 frequency band, a second row and a third row indicate an efficiency difference value of the antenna in a full holding state of the two hands, a fourth row and a fifth row indicate an adjustment difference value of antenna in a half holding state of the two hands, wherein UR indicates a holding state when the USB interface is right-held, UL indicates a holding state when the USB interface is left-held, it is assumed that a USB interface is provided at a fixed position on one side of the terminal, when the user holds the terminal in two hands, and if the terminal is left-held by the user, the interface is located on the right side of the USB interface, and if the USB interface is located on the right side. The HR in the sixth column indicates the right-hand single-hand holding state, and the HL in the seventh column indicates the left-hand single-hand holding state. As can be seen from table 1, the antenna efficiency was reduced in each holding state, and the difference in the antenna efficiency reduction was large in the different holding states. Based on the above-mentioned problems, the inventor proposes a technical solution of the embodiment of the present application, and the technical solution of the embodiment of the present application is described in detail below.

As shown in fig. 3a to 3c, fig. 3a to 3c are schematic diagrams of three antenna structures according to an embodiment of the present application, and the embodiment of the present application provides an antenna, including: a radiator 2, the radiator 2 comprising a first portion 21 located between a first ground point 101 and a second ground point 102, the first portion 21 being provided with a feed point 3; the radiator 2 further comprises a second portion 22 located between the first ground point 101 and the third ground point 103, the second portion 22 forming a path from the first ground point 101 to the third ground point 103; the first ground point 101, the second ground point 102 and the third ground point 103 are all grounded.

Specifically, the second portion 22 forms a path from the first ground point 101 to the third ground point 103, that is, the second portion 22 is a complete conductive structure from the first ground point 101 to the third ground point 103, so that the second portion 22 is grounded through the first ground point 101 and returns to the ground at the third ground point 103 to form a closed loop, thereby improving the adverse effect of the hand-held state on the antenna efficiency. In the structure shown in fig. 3a to 3c, the first portion 21 is a complete structure from the first grounding point 101 to the second grounding point 102, and the specific structure of the first portion 21 is not limited in the embodiment of the present application, for example, in other realizable embodiments, a slit may be provided on the first portion 21, in the embodiment of the present application, as long as the second portion 22 of the radiator 2 forms a path from the first grounding point 101 to the third grounding point 103. In the structure shown in fig. 1a, the radiator 2 comprises, in addition to the first portion 21 and the second portion 22, a third portion 23, the third portion 23 extending from the second ground point 102 to the fourth ground point 104, and the fourth ground point 104 being grounded. In the structure shown in fig. 1b and 1c, the only difference is the specific position of the feeding point 3 on the second portion 22.

The following specifically describes the technical effects of the embodiment of the present application, taking the simulation result of the antenna shown in fig. 3a as an example. As shown in fig. 4 and table 2, fig. 4 is a schematic diagram of the positions of the antennas when performing efficiency simulation, that is, the positions of the antennas in the terminal, where the battery is disposed in the terminal, and the antennas are located at one side of the battery, where table 2 is the simulation result of the antenna efficiency difference corresponding to fig. 3a in the embodiment of the present application, it should be noted that the positions of the antennas in table 1 and table 2 are both the positions shown in fig. 4, that is, the antenna efficiency difference simulation is performed for different antennas at the same position.

TABLE 2

Table 2 corresponds to table 1, the data in the table are antenna efficiency difference values, the antenna efficiency difference values are difference values of antenna efficiency in a holding state and antenna efficiency in an unclamped state, wherein a negative value indicates that the antenna efficiency in the holding state is reduced relative to the unclamped state, a positive value indicates that the antenna efficiency in the holding state is improved relative to the unclamped state, wherein a third row indicates the efficiency difference value in a different holding state when the antenna works in the N41 frequency band, a fourth row indicates the efficiency difference value in a different holding state when the antenna works in the N77 frequency band, a fifth row indicates the efficiency difference value in a different holding state when the antenna works in the N79 frequency band, a second row and a third row indicate the efficiency difference value of the antenna in a full holding state of both hands, a fourth row and a fifth row indicate the adjustment rate difference value of the antenna in a half holding state of both hands, wherein UR indicates the holding state when the USB interface is right placed, UL indicates the holding state when the USB interface is left placed, assuming that a USB interface is provided at a fixed position on one side of the terminal, and if the user is located on the right side of the terminal, the USB interface is located on the right side of the USB interface corresponding to the USB interface if the user is located on the right side of the USB interface. The HR in the sixth column indicates the right-hand single-hand holding state, and the HL in the seventh column indicates the left-hand single-hand holding state. As can be seen from a comparison between table 2 and table 1, compared with the prior art, the antenna efficiency in the embodiment of the application is reduced in the handheld state, that is, the adverse effect of the handheld state on the antenna efficiency is improved, and the antenna efficiency in different handheld states is more similar. In addition, the comparison between table 2 and table 1 only shows the effect of improving the antenna efficiency when the antenna is disposed at the position shown in fig. 4, and in fact, the antenna efficiency is improved when the antenna is disposed at other positions. In addition, compared with the prior art, the embodiment of the application reduces the number of the gaps on the antenna radiator, thereby being beneficial to improving the strength.

Optionally, as shown in fig. 3a, the radiator 2 further comprises a third portion 23 located between the second ground point 102 and the fourth ground point 104, the third portion 23 forming a path from the second ground point 102 to the fourth ground point 104, the fourth ground point 104 being grounded, i.e. the third portion 23 is grounded through the first ground point 101 and the fourth ground point 104, respectively, thereby forming a closed loop from ground to ground.

Alternatively, as shown in fig. 3 a-3 c, the first portion 21 forms a path from the first ground point 101 to the second ground point 102, i.e. the first portion 21 is grounded through the first ground point 101 and the second ground point 102, respectively, thereby forming a closed loop from ground to ground.

Specifically, for example, in the structure shown in fig. 3a, the radiator 2 is a continuous and extended integral structure, a path is formed between the third ground point 103 and the fourth ground point 104, the third ground point 103 and the fourth ground point 104 are two ends of the radiator 2, and on the radiator 2, the distance between the feeding point 3 and the first ground point 101 may be greater than the distance between the feeding point 3 and the second ground point 102. As shown in fig. 5a and 5b, fig. 5a is an S-parameter graph of the antenna simulation shown in fig. 3a, fig. 5b is an efficiency graph of the antenna simulation shown in fig. 3, in fig. 5b, a dotted line indicates radiation efficiency, a solid line indicates system efficiency, and the antenna structure can support three frequency bands of N41, N77, and N79. In the frequency band supported by the antenna, four resonant modes are shared, the first resonant mode is a 2.6GHz resonant mode formed between the first ground point 101 and the second ground point 102, the second resonant mode is a 3.48GHz resonant mode formed between the second ground point 102 and the fourth ground point 104, the third resonant mode is a 4.2GHz resonant mode formed between the first ground point 101 and the feed point 3, the fourth resonant mode is a 4.9GHz resonant mode formed between the third ground point 103 and the first ground point 101, as shown in fig. 6 a-6 h, fig. 6a is a schematic diagram of current distribution of the antenna shown in fig. 3a in the first resonant mode, fig. 6b is a schematic diagram of current distribution of the antenna shown in fig. 3a in the first resonant mode, fig. 6c is a schematic diagram of electric field distribution of the antenna shown in fig. 3a in the second resonant mode, fig. 6e is a schematic diagram of electric field distribution of the antenna shown in fig. 3a in the third resonant mode, fig. 6f is a schematic diagram of electric field distribution of the antenna shown in fig. 6a in the fourth resonant mode shown in fig. 6h, and fig. 6a schematic diagram of electric field distribution of the antenna shown in fig. 6a in the fourth resonant mode in fig. 3a schematic diagram of the antenna shown in the fourth resonant mode. Wherein the radiator that gives rise to the highest resonance in the supported frequency band is the second part 22 furthest from the feed point 3.

Alternatively, as shown in fig. 7a to 7d, fig. 7a to 7d are schematic diagrams of another four antenna structures according to the embodiment of the present application, where the first portion 21 has a slot, and the first portion 21 is divided into a first sub-portion 201 and a second sub-portion 202 by the slot, the first sub-portion 201 extends from the first ground point 101 to one side of the slot, and the second sub-portion 202 extends from the second ground point 102 to the other side of the slot.

Specifically, in the structure shown in fig. 7a, a slot is provided on the first portion 21, but the second portion 22 is a complete structure, a closed loop from ground to ground is realized through the first grounding point 101 and the third grounding point 103, the third portion 23 is also a complete structure, a closed loop from ground to ground is realized through the second grounding point 102 and the fourth grounding point 104, and the feeding point 3 is located on the first sub-portion 201 between the first grounding point 101 and the slot, as shown in fig. 8a, and fig. 8a is an S-parameter graph of the antenna simulation shown in fig. 7 a; the structure shown in fig. 7b has the third portion 23 removed compared to the structure shown in fig. 7a, and fig. 8b is a graph of S-parameters for the antenna simulation shown in fig. 7 b; the structure shown in fig. 7c is similar to the structure shown in fig. 7a, except that the second ground point 102 is located at a difference in position, in the structure shown in fig. 7a, the second ground point 102 is located in the vicinity of the slit, and in the structure shown in fig. 7c, the second ground point 102 is located at a middle portion between the slit and the fourth ground point 104; the structure shown in fig. 7d is similar to the structure shown in fig. 7b, except that in the structure shown in fig. 7b the feed point 3 is located between the first ground point 101 and the slot, i.e. on the first subsection 201, whereas in the structure shown in fig. 7d the feed point 3 is located between the second ground point 102 and the slot, i.e. on the second subsection 202.

Optionally, the antenna further includes: a feeding part (not shown in the drawings) electrically connected to the feeding point 3 of the first part 21, or the feeding part is connected to the feeding point 3 of the first part 21 by capacitive coupling.

Specifically, the feeding manner of the feeding point 3 in each of the above embodiments may include both direct feeding and capacitive feeding, and the direct feeding may be that the feeding portion is directly fed to the feeding point 3 of the first portion 21 even if the feeding portion is directly connected to the feeding point 3 of the first portion 21, and direct current is conducted between the feeding portion and the first portion 21; the capacitive feed is fed to the feed point 3 of the first part 21 by capacitive coupling, even though the feed is connected to the feed point 3 of the first part 21 by capacitive coupling. It should be noted that, the simulation results of the embodiments of the present application all use a coupling feeding method.

Alternatively, as shown in fig. 9a to 9c, fig. 9a to 9c are schematic views of three other antenna structures according to an embodiment of the present application, where at least one ground point is grounded through the matching adjustment device 4.

Specifically, the matching adjustment device 4 is used for adjusting the frequency band covered by the antenna, for example, the matching adjustment device 4 includes a plurality of elements with different impedance characteristics and a gating switch, the gating switch can control the grounding point to be grounded through one of the elements, and the gating switch can control the corresponding grounding point to be grounded through the element with different impedance characteristics, so as to realize different impedance matching, that is, the antenna can cover different frequency bands through the control of the gating switch. The number and position of the matching adjustment means 4 may be set according to practical needs, for example, one matching adjustment means 4 may be connected in series between each grounding point of the radiator 2 and the ground, or one matching adjustment means 4 may be connected in series between some of the grounding points and the ground, for example, in the structure shown in fig. 9a and 9b, the first grounding point 101 is grounded through the matching adjustment means 4, and in the structure shown in fig. 9c, the second grounding point 102 is grounded through the matching adjustment means 4. As shown in fig. 10, fig. 10 is an S parameter curve simulated by the antenna shown in fig. 9a in different frequency band adjustment states, where three different curves respectively represent S parameter curves of the matching adjustment device 4 in the three different adjustment states, for example, the matching adjustment device 4 includes a first element, a second element, a third element, and a gate switch, the first element, the second element, and the third element are all connected to the first ground point 101, one end of the gate switch is grounded, the other end of the gate switch can be switched to connect the first element, the second element, or the third element, where the first element, the second element, and the third element have different impedance characteristics, the matching adjustment device 4 has three different adjustment states, in the first adjustment state, the gate switch is switched to connect the first element, at this time, the first ground point 101 of the radiator 2 is grounded through the first element, corresponding to the S parameter curve in fig. 10, in the second adjustment state, the gate switch is switched to connect the second element, the first ground point of the radiator 2 is connected to the second element, the first ground point 101 is connected to the second element through the second element, the second element is connected to the second element, the third element is connected to the third element, and the third element is connected to the third element, at this time, and the second element is different from the second element is connected to the third element, corresponding to the third element, and the third element is connected to the third element, corresponding to the third element, at the second element and the third element is connected to the second element, and the third element has different parameter curve, and the third element has different impedance characteristics, and the phase curve can cover the phase, and the phase parameter curve can be seen from the antenna is different from the antenna.

Optionally, at least one ground point is grounded through a capacitor or an inductor, and impedance matching is achieved through a capacitor or an inductor connected in series between the ground point and ground.

Alternatively, the radiator 2 is a strip-like structure.

In particular, the strip-shaped structure is more beneficial to the layout of the antenna in the terminal as the radiator 2, for example, the radiator 2 may be implemented by a metal frame of the terminal, the specific implementation manner of the antenna structure is not limited, for example, the antenna structure may be manufactured by a Laser-Direct-structuring (LDS) technology, or may be a mode decorative antenna (Mode decoration antenna, MDA).

The embodiment of the application also provides a terminal comprising the antenna in the embodiment.

The specific structure and principle of the antenna are not repeated, the antenna is used for transmitting and receiving electromagnetic wave signals, one or more antennas can be included in the terminal, different antennas can be multiplexed to improve the utilization rate of the antenna, the terminal also comprises a communication module matched with the antenna for use, for example, the terminal can comprise a mobile communication module, a wireless communication module, a modem processor, a baseband processor and the like, and the mobile communication module can provide a solution of wireless communication comprising 2G/3G/4G/5G and the like applied to the terminal. The mobile communication module may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA), etc. The mobile communication module can receive electromagnetic waves by the antenna, filter, amplify and the like the received electromagnetic waves, and transmit the electromagnetic waves to the modem processor for demodulation. The mobile communication module can amplify the signal modulated by the modulation and demodulation processor and convert the signal into electromagnetic waves to radiate through the antenna. In some embodiments, at least part of the functional modules of the mobile communication module may be provided in the processor. In some embodiments, at least part of the functional modules of the mobile communication module may be provided in the same device as at least part of the modules of the processor. The modem processor may include a modulator and a demodulator. The modulator is used for modulating the low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used for demodulating the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then transmits the demodulated low frequency baseband signal to the baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and then transferred to the application processor. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be provided in the same device as the mobile communication module or other functional module, independent of the processor. The wireless communication module may provide solutions for wireless communication including wireless local area network (wireless local area networks, WLAN) (e.g., wireless fidelity (wireless fidelity, wi-Fi) network), bluetooth (BT), global navigation satellite system (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field wireless communication technology (near field communication, NFC), infrared technology (IR), etc. applied on the terminal. The wireless communication module may be one or more devices that integrate at least one communication processing module. The wireless communication module receives electromagnetic waves through the antenna, modulates the electromagnetic wave signals, filters the electromagnetic wave signals and sends the processed signals to the processor. The wireless communication module can also receive signals to be transmitted from the processor, frequency modulate the signals, amplify the signals, convert the signals into electromagnetic waves through the antenna and radiate the electromagnetic waves.

Optionally, as shown in fig. 11 and fig. 12a to 12c, fig. 11 is a schematic structural diagram of a terminal in an embodiment of the present application, and fig. 12a to 12c are schematic structural diagrams of three antennas in fig. 11, where the terminal further includes: battery 100, battery cover 200, and terminal holder (not shown in the drawings); the radiator 2 in the antenna is a main radiator, which is located at one side of the battery 100; the battery cover 200 or the terminal bracket is further provided with an auxiliary radiator 5.

Specifically, the auxiliary radiator 5 may be manufactured through an LDS process, may be manufactured through other forms such as a flexible circuit board (Flexible Printed Circuit, FPC) or silver paste, and may or may not be connected between the auxiliary radiator 5 and the main radiator, and when the auxiliary radiator 5 is not connected to the main radiator, the auxiliary radiator 5 may or may not be grounded, and specific requirements of the auxiliary radiator 5 may be set as required, and the auxiliary radiator 5 is used to assist the main radiator to realize an electromagnetic wave radiation function of the antenna, so as to generate more resonances and increase bandwidth.

In the embodiments of the present application, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relation of association objects, and indicates that there may be three kinds of relations, for example, a and/or B, and may indicate that a alone exists, a and B together, and B alone exists. Wherein A, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of the following" and the like means any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or plural.

The above is only a preferred embodiment of the present application, and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An antenna, comprising:

a radiator including a first portion between a first ground point and a second ground point, the first portion having a feed point disposed thereon;

the radiator further includes a second portion between the first ground point and a third ground point, the second portion forming a path from the first ground point to the third ground point;

the first grounding point, the second grounding point and the third grounding point are all grounded, and the second grounding point and the third grounding point are two tail ends of the radiator respectively;

the first portion forms a path from the first ground point to the second ground point.

2. The antenna of claim 1, further comprising:

and a feeding part electrically connected to the feeding point of the first part, or connected to the feeding point of the first part through capacitive coupling.

3. An antenna according to claim 1 or 2, characterized in that,

any one of the first ground point, the second ground point and the third ground point is grounded through a matching adjustment device.

4. An antenna according to claim 3, characterized in that,

the matching regulating device comprises a plurality of elements with different impedance characteristics and a gating switch, wherein the gating switch is used for controlling the grounding point to be grounded through one of the elements.

5. An antenna according to claim 1 or 2, characterized in that,

any one of the first ground point, the second ground point, and the third ground point is grounded through capacitance or inductance.

6. An antenna according to claim 1 or 2, characterized in that,

the radiator is in a strip-shaped structure.

7. A terminal comprising an antenna as claimed in any one of claims 1 to 6.

8. The terminal of claim 7, further comprising:

a battery, a battery cover and a terminal bracket;

the radiator in the antenna is a main radiator, and the main radiator is positioned at one side of the battery;

and an auxiliary radiator is also arranged on the battery cover or the terminal bracket.