WO2023030401A1

WO2023030401A1 - Antenna apparatus and electronic device

Info

Publication number: WO2023030401A1
Application number: PCT/CN2022/116285
Authority: WO
Inventors: 陈玉稳
Original assignee: 维沃移动通信有限公司
Priority date: 2021-08-31
Filing date: 2022-08-31
Publication date: 2023-03-09
Also published as: CN113644438A

Abstract

The present application relates to the technical field of electrons, and discloses an antenna apparatus and an electronic device. The antenna apparatus comprises a first antenna arm, a second antenna arm, a first feed structure, and a second feed structure; the first antenna arm is connected to the first feed structure; the second antenna arm is connected to the second feed structure; one end of the first antenna arm is grounded; one end of the second antenna arm is grounded; the other end of the first antenna arm is coupled to the other end of the second antenna arm at an interval; and the length of the first antenna arm is greater than the length of the second antenna arm.

Description

Antenna devices and electronic equipment

cross reference

The present invention claims the priority of the Chinese patent application submitted to the China Patent Office on August 31, 2021, with the application number 202111015331.9 and the title of the invention "antenna device and electronic equipment", the entire content of which is incorporated herein by reference .

technical field

The present application belongs to the field of electronic technology, and in particular relates to an antenna device and electronic equipment.

Background technique

With the rapid development of communication technology, the number of antennas and antenna frequency bands in electronic equipment are increasing, and the isolation between multiple antennas in multiple frequency bands needs to be improved to avoid mutual interference. However, the internal space of electronic equipment is limited, and it is gradually difficult to meet the needs of antennas. Design space requirements.

In the process of implementing the present application, the inventors have found that at least the following problem exists in the prior art: how to improve the isolation between multiple antennas in multiple frequency bands.

Contents of the invention

The purpose of the embodiments of the present application is to provide an antenna device and an electronic device, which can solve the problem of how to improve the isolation between multiple antennas in multiple frequency bands.

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

In a first aspect, an embodiment of the present application provides an antenna device, which includes: a first antenna arm, a second antenna arm, a first feeding structure, and a second feeding structure; wherein:

The first antenna arm is connected to the first feeding structure;

The second antenna arm is connected to the second feeding structure;

One end of the first antenna arm is grounded;

One end of the second antenna arm is grounded;

The other end of the first antenna arm is spacedly coupled to the other end of the second antenna arm, and the length of the first antenna arm is greater than the length of the second antenna arm.

In a second aspect, an embodiment of the present application provides an electronic device, where the electronic device includes the antenna device as described in the foregoing first aspect.

In an embodiment of the present application, an antenna device includes: a first antenna arm, a second antenna arm, a first feeding structure, and a second feeding structure; wherein: the first antenna arm is connected to the first feeding structure; The second antenna arm is connected to the second feeding structure; one end of the first antenna arm is grounded; one end of the second antenna arm is grounded; the other end of the first antenna arm is coupled with the other end of the second antenna arm, and the second The length of one antenna arm is greater than the length of the second antenna arm. Through the technical solution of the embodiment of the present application, the other end of the first antenna arm and the other end of the second antenna arm are spaced and coupled, and the first antenna arm and the second antenna arm are respectively connected to different feeding structures to receive the corresponding The signals sent by the feed structure and corresponding to the feed structure can improve the isolation between multiple antennas of multiple frequency bands, so that the signals of various frequency bands are not easy to be confused.

Description of drawings

FIG. 1 is a first physical diagram of an antenna device provided by an embodiment of the present application;

FIG. 2 is a first structural schematic diagram of an antenna device provided by an embodiment of the present application;

FIG. 3a is a schematic diagram of a second structure of an antenna device provided by an embodiment of the present application;

Fig. 3b is a second physical diagram of the antenna device provided by an embodiment of the present application;

FIG. 4a is a schematic diagram of a third structure of an antenna device provided by an embodiment of the present application;

Fig. 4b is a third physical diagram of the antenna device provided by an embodiment of the present application;

Fig. 5a is a schematic diagram of a fourth structure of an antenna device provided by an embodiment of the present application;

Fig. 5b is a fourth physical diagram of the antenna device provided by an embodiment of the present application;

Fig. 6a is a schematic diagram of a fifth structure of an antenna device provided by an embodiment of the present application;

Fig. 6b is a fifth physical diagram of the antenna device provided by an embodiment of the present application;

Fig. 7a is a schematic diagram of a sixth structure of an antenna device provided by an embodiment of the present application;

Fig. 7b is a sixth physical diagram of the antenna device provided by an embodiment of the present application;

FIG. 8 is a schematic circuit diagram of a first matching circuit in an antenna device provided by an embodiment of the present application;

FIG. 9 is a first impedance curve diagram provided by an embodiment of the present application;

FIG. 10 is a second impedance curve diagram provided by an embodiment of the present application;

FIG. 11 is a schematic diagram of S parameters of an antenna device provided by an embodiment of the present application;

FIG. 12 is a schematic diagram of a hardware structure of an electronic device provided by an embodiment of the present application.

Explanation of reference signs:

101-first antenna arm, 102-second antenna arm, 103-first feed structure, 104-second feed structure, 105-first capacitor, 106-first inductor, 107-second capacitor, 108- The first raised structure, 109-the second raised structure, 110-the first excitation piece, 111-the third feed structure, 112-the second excitation piece, 113-the first matching circuit, 1131-the first input terminal, 1132-second inductor, 1133-third capacitor, 1134 fourth inductor, 114-second matching circuit, 1141-second input terminal, 1142-fourth capacitor, 1143-third inductor, 115-third excitation chip, 116 - Fourth feed structure.

Detailed ways

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

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It should be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application can be practiced in sequences other than those illustrated or described herein, and that references to "first," "second," etc. distinguish Objects are generally of one type, and the number of objects is not limited. For example, there may be one or more first objects. In addition, "and/or" in the description and claims means at least one of the connected objects, and the character "/" generally means that the related objects before and after are an "or" relationship.

The antenna device provided by the embodiment of the present application will be described in detail below through specific embodiments and application scenarios with reference to the accompanying drawings.

Referring to FIG. 1-FIG. 5b and FIG. 9-FIG. 11, the embodiments of the present application provide various antenna devices and electronic equipment.

FIG. 1 is a first physical diagram of an antenna device provided by an embodiment of the present application. FIG. 2 is a schematic diagram of a second structure of an antenna device provided by an embodiment of the present application.

As shown in Figure 2, the antenna device includes: a first antenna arm 101, a second antenna arm 102, a first feed structure 103 and a second feed structure 104; wherein: the first antenna arm 101 and the first feed structure 103 connection; the second antenna arm 102 is connected to the second feed structure 104; one end of the first antenna arm 101 is grounded; one end of the second antenna arm 102 is grounded; the other end of the first antenna arm 101 is connected to the second antenna arm 102 The other end is coupled at intervals, and the length of the first antenna arm 101 is greater than the length of the second antenna arm 102 .

The actual figure shown in FIG. 1 also includes various structures corresponding to FIG. 2 , and the length H1 of the first antenna arm 101 is greater than the length H2 of the second antenna arm 102 , which will not be repeated here.

The one end of the first antenna arm 101 mentioned in this specification all refers to the end of the two ends of the first antenna arm 101 that is away from the second antenna arm 102 . In the embodiment shown in FIG. 2 , one end of the first antenna arm 101 may be the left end of the first antenna arm 101 .

The one end of the second antenna arm 102 mentioned in this specification all refers to the end of the two ends of the second antenna arm 102 that is away from the first antenna arm 101 . In the embodiment shown in FIG. 2 , one end of the second antenna arm 102 may be the right end of the second antenna arm 102 .

The other end of the first antenna arm 101 mentioned in this specification refers to the end close to the second antenna arm 102 among the two ends of the first antenna arm 101 . In the embodiment shown in FIG. 2 , the other end of the first antenna arm 101 may be the right end of the first antenna arm 101 .

The other end of the second antenna arm 102 mentioned in this specification refers to the end close to the first antenna arm 101 among the two ends of the second antenna arm 102 . In the embodiment shown in FIG. 2 , one end of the second antenna arm 102 may be the left end of the second antenna arm 102 . The first antenna arm 101 may be a bar made of metal, and the second antenna arm 102 may be a bar made of metal with a length different from that of the first antenna arm 101.

The first feeding structure 103 may be a structure that feeds energy to the first antenna arm 101 . In a specific implementation, an elastic piece may be used as the first feeding structure 103 , and the elastic piece is connected to the first antenna arm 101 .

The second feeding structure 104 is similar to the first feeding structure 103 , and in a specific implementation, the second feeding structure 104 may be an elastic piece, and the elastic piece is connected to the second antenna arm 102 .

The second antenna arm 102 is connected to the second feeding structure 104. In specific implementation, the second protruding structure 109 provided on the second antenna arm 102 may be connected to the second feeding structure 104 in a contact manner, so as to Realize the connection between the second antenna arm 102 and the second feeding structure 104; it may also be a non-contact connection through the second antenna arm 102 and the second exciting piece 112 in a coupled manner, the second exciting piece 112 is connected to the second feed structure 104 to realize the connection between the second antenna arm 102 and the second feed structure 104 . The connection mode between the first antenna arm 101 and the first feeding structure 103 is similar to the connection mode between the second antenna arm 102 and the second feeding structure 104 , and will not be repeated here.

The antenna device provided in the embodiment of the present application may be an antenna device disposed inside an electronic device.

During specific implementation, the first antenna arm 101 and the second antenna arm 102 may be formed by making breakpoints at specified positions of the metal middle frame of the electronic device. The first antenna arm 101 and the second antenna arm 102 may be a multiplexing of the metal middle frame of the electronic device.

In an electronic device, the metal middle frame may be connected to a carrying part, and the carrying part is used to carry a display screen of the electronic device and a main board of the electronic device. The carrying part can be made of metal. One end of the first antenna arm 101 formed by the breakpoint of the metal middle frame is connected to the bearing component, which can be regarded as one end of the first antenna arm 101 being grounded. Similarly, one end of the second antenna arm 102 is connected to the bearing component, which can be regarded as one end of the second antenna arm 102 being grounded.

In the electronic device, the first antenna arm 101 and the second antenna arm 102 are formed by a break point in the metal middle frame, and it can be regarded that the other end of the first antenna arm 101 is spaced from the other end of the second antenna arm 102 Coupling settings.

The length of the first antenna arm 101 is greater than the length of the second antenna arm 102 .

In the aforementioned embodiment of the antenna device, the antenna device includes: a first antenna arm 101, a second antenna arm 102, a first feeding structure 103, and a second feeding structure 104; wherein: the first antenna arm 101 and the second antenna arm 101 A feed structure 103 is connected; the second antenna arm 102 is connected to the second feed structure 104; one end of the first antenna arm 101 is grounded; one end of the second antenna arm 102 is grounded; the other end of the first antenna arm 101 is connected to the second The other ends of the antenna arms 102 are coupled at intervals, and the length of the first antenna arm 101 is greater than the length of the second antenna arm 102 . Through the technical solution of the embodiment of the present application, the other end of the first antenna arm 101 and the other end of the second antenna arm 102 are spaced and coupled, and the first antenna arm 101 and the second antenna arm 102 are respectively connected to different feeding structures , receiving the signal corresponding to the feed structure sent by the corresponding feed structure can improve the isolation between multiple antennas in multiple frequency bands, so that the signals of each frequency band are not easy to be confused. Taking the antenna device shown in FIG. 2 as an example, the relationship among the first antenna, the second antenna, the first antenna arm 101 , and the second antenna arm 102 will be described.

The other end of the first antenna arm 101 is coupled with the other end of the second antenna arm 102, and the first antenna arm 101 and the second antenna arm 102 are coupled to each other. It can be understood that the first antenna arm 101 and the second The antenna arms 102 are in a parasitic relationship with each other. Therefore, the first antenna arm 101 can be used as the parasitic part of the second antenna arm 102, and the parasitic resonance frequency of the first antenna arm 101 refers to the parasitic resonance frequency of the first antenna arm 101 relative to the second antenna arm 102; 102 may serve as a parasitic antenna arm of the first antenna arm 101 , and the parasitic resonance frequency of the second antenna arm 102 refers to the parasitic resonance frequency of the second antenna arm 102 as a parasitic antenna arm of the first antenna arm 101 .

From a structural point of view, in the antenna device shown in Figure 2, the first antenna arm 101 and the second antenna arm 102 are separated, but from a functional point of view, the signal transmission work or signal reception work of any frequency band It cannot be realized only through the first antenna arm 101 , nor can it be realized only through the second antenna arm 102 , that is, the first antenna arm 101 and the second antenna arm 102 jointly perform signal transmission or signal reception.

Functionally, the antenna device shown in FIG. 2 can be divided into a first antenna and a second antenna. During specific implementation, the first antenna performs signal transmission mainly on the first antenna arm 101, combined with the first antenna arm 101. The second antenna arm 102 coupled with 101 is jointly performed; the signal receiving work of the second antenna is performed mainly by the second antenna arm, combined with the first antenna arm 101 coupled with the second antenna arm 102 .

In each antenna device embodiment provided in this specification, the principle of functionally dividing the antenna device into the first antenna corresponding to the first antenna arm 101 and the second antenna corresponding to the second antenna arm 102 is the same as that of the antenna in FIG. 2 Device embodiments are similar.

Optionally, the first antenna corresponding to the first antenna arm 101 works in the first frequency band and the second frequency band; the first frequency band is smaller than the second frequency band; The difference is less than the preset frequency threshold.

During specific implementation, the first frequency band may be a sub-low frequency band, the second frequency band may be a low frequency band, and the first frequency band is smaller than the second frequency band. The first frequency band and the second frequency band can be represented by dual frequency f1\f2. Wherein, f1 can be understood as the middle value of the sub-low frequency band, f2 can be understood as the middle value of the low frequency band, and f1 is smaller than f2.

The difference between the spurious resonant frequencies f2' and f2 of the second antenna arm 102 is less than a preset frequency threshold, and the preset frequency threshold may take a very small frequency value. Then, the difference between f2' and f2 is less than the preset frequency threshold. It can be understood that the spurious resonant frequency f2' of the second antenna arm is close to the middle value f2 of the second frequency band.

Optionally, the second antenna corresponding to the second antenna arm 102 works in a third frequency band; the spurious resonance frequency of the first antenna arm 101 is located in the third frequency band.

During specific implementation, the third frequency band may be an intermediate frequency band, and the third frequency band may be represented by f3\f4, that is, the minimum value of the third frequency band is f3, and the maximum value is f4. The third frequency band is greater than the aforementioned second frequency band. The spurious resonance frequency of the first antenna arm 101 is located in the third frequency band, that is, the spurious resonance frequency of the first antenna arm 101 is greater than or equal to f3 and less than or equal to f4.

In order to realize that in the antenna device, the difference between the spurious resonant frequency of the second antenna arm 102 and the middle value of the second frequency band is smaller than the preset frequency threshold, and the spurious resonant frequency of the first antenna arm 101 is located in the third frequency band, it can be adopted The structure shown in the following examples.

Optionally, the first feed structure 103 is grounded through the first capacitor 106 and the first inductor 105 connected in series; the second feed structure 104 is grounded through the second capacitor 107 .

Fig. 3a is a schematic diagram of a second structure of an antenna device provided by an embodiment of the present application. Fig. 3b is a second physical diagram of the antenna device provided by an embodiment of the present application. The antenna devices shown in Fig. 3a and Fig. 3b are the same antenna device.

As shown in Figure 3a, the first feed structure 103 is connected to the first inductor 105, the first inductor 105 is connected to the first capacitor 106, and the first capacitor 106 is grounded; the second feed structure 104 is connected to the second capacitor 107, and the first capacitor 106 is connected to the ground. The second capacitor 107 is grounded. The physical diagram shown in FIG. 3b also includes structures corresponding to those in FIG. 3a , which will not be repeated here.

During specific implementation, the positions of the first inductor 105 and the first capacitor 106 can be interchanged without affecting the operation of the antenna device. That is, the first feed structure 103 is connected to the first capacitor 106, the first capacitor 106 is connected to the first inductor 105, and the first inductor 105 is grounded.

The working principle of the first feed structure 103 being grounded through the first capacitor 106 and the first inductor 105 connected in series, and the second feed structure 104 being grounded through the second capacitor 107 will be specifically described below:

Regarding the grounding of the first feed structure 103 through the first capacitor 106 and the first inductor 105 connected in series:

The second antenna works in the intermediate frequency band f3\f4, and the first antenna arm 101 can be used as the parasitic antenna arm of the second antenna arm. The spurious resonant frequency is much smaller than f3, which has an obvious negative effect on the signal receiving and signal transmitting work of the second antenna. If the structure in which the first feed structure 103 is grounded through the first capacitor 106 and the first inductor 105 connected in series, for signals in the intermediate frequency band, it is equivalent to the signal being grounded near the first feed structure 103 . It can be understood that, if this structure is adopted, for the signal of the intermediate frequency band received or transmitted by the second antenna, the length of the first antenna arm 101 becomes shorter, and the spurious resonance frequency of the first antenna arm 101 increases to the intermediate frequency. In the segment, it has a positive effect on the signal receiving work and signal transmitting work of the second antenna.

It should be noted that if the first antenna arm 101 is directly short-circuited, it will interfere with the signal transmission or signal reception of the first antenna for low-frequency signals and sub-low-frequency signals, so the loading at the first feeding structure 103 is used here The structure of capacitors and inductors. For intermediate frequency signals, it means that the first antenna arm 101 is grounded near the first feeding structure 103 , and for low frequency signals, the first antenna arm 101 is hardly affected.

Regarding the grounding of the second feed structure 104 through the second capacitor 107:

For the antenna device installed inside the electronic device, there are usually other components other than the antenna device inside the electronic device, and the space left for the antenna device is small, so that the length of the first antenna arm 101 and the second antenna arm 102 The smaller the value, the higher the parasitic resonant frequency of the second antenna arm 102 is for the first antenna arm 101 . At this time, the parasitic resonant frequency of the second antenna arm 102 can be reduced by loading a capacitor.

The first antenna works in the first frequency band and the second frequency band. The frequency of the first frequency band and the second frequency band is relatively low and the dual-frequency interval is relatively small. It can be understood that the dual-frequency interval is small, that is, the two operating frequency bands are relatively close, resulting in the first It is difficult for the antenna to take care of both the signal transmitting work and the signal receiving work of the first frequency band and the second frequency band, that is, it is difficult to match two different frequency bands at the same time.

At this time, the second antenna arm 102 acts as a parasitic antenna arm of the first antenna arm 101, and the parasitic resonance frequency f' of the second antenna arm is much higher than f2. By adopting the structure of loading capacitance to the ground at the second feeding structure 104, the spurious resonant frequency f2' of the second antenna arm 102 is close to f2, so that the initial impedance of the first antenna converges at f2. Antenna matching optimization is easy to achieve better results.

FIG. 9 is a first impedance curve diagram provided by an embodiment of the present application; FIG. 10 is a second impedance curve diagram provided by an embodiment of the present application. The impedance graph in Fig. 9 refers to the impedance graph of the first antenna before the second capacitor 107 is grounded at the second feed structure 104; the impedance graph in Fig. 9 refers to the impedance graph of the second feed structure 104; The impedance curve of the first antenna after being grounded through the second capacitor 107 at 104 .

After the second feed structure 104 is grounded through the second capacitor 107, the initial impedance of the first antenna has a spurious resonant frequency f2' close to it not far from f2.

In addition to the various structures corresponding to FIG. 2, the antenna device shown in FIG. Three feed structures 111 , a third excitation sheet 115 and a third feed structure 116 . The following is a detailed description in conjunction with multiple drawings.

Optionally, the first position on the first antenna arm 101 is provided with a first raised structure 108; the distance between the first position and the other end of the first antenna arm is less than 1/4 wavelength of the third frequency band; the first The antenna arm 101 is connected to the first feeding structure 103 through the first protruding structure 108; the second position on the second antenna arm 102 is provided with a second protruding structure 109; the second antenna arm 102 passes through the second protruding structure 109 It is connected with the second feeding structure 104 .

Fig. 4a is a schematic diagram of a third structure of an antenna device provided by an embodiment of the present application. Fig. 4b is a third physical diagram of the antenna device provided by an embodiment of the present application. The antenna devices shown in Fig. 4a and Fig. 4b are the same antenna device.

1/4 wavelength of the third frequency band, that is, 1/4 wavelength of the intermediate frequency band. The distance between the first position and the other end of the first antenna arm may be set to be less than 1/4 wavelength of the intermediate frequency band.

In the embodiment of the antenna device shown in FIG. 4 a , the first antenna arm 101 and the first protruding structure 108 may be two parts included in the same component. The first antenna arm 101 and the first protruding structure 108 may also be two components connected together. The first protruding structure may be a regular column, or may be a protruding structure with an irregular shape, and the embodiment of the present application does not specifically limit the shape of the first protruding structure 108 . The second protruding structure 109 is similar to the first protruding structure 108 and will not be repeated here. The physical diagram shown in FIG. 3b also includes structures corresponding to those in FIG. 3a , which will not be repeated here.

During specific implementation, the distance between the second position and one end of the second antenna arm 102 is within a preset distance range. The preset distance range may be between 4mm and 8mm. The second antenna arm 102 needs to be loaded with capacitance, and at the same time, the intermediate frequency band of the second antenna needs to be considered. Therefore, the distance between the second position and one end of the second antenna arm 102 can be set between 4mm and 8mm.

During specific implementation, the distance between the first position and one end of the first antenna arm 101 is not greater than a specified distance.

The specified distance may be 10mm. Since the loading capacitance at the first feed structure 103 will cause the impedance of the first antenna arm to decrease, it is necessary to limit the distance between the first position and one end of the first antenna arm 101 so that the initial impedance of the first antenna is the same as the unloaded capacitance The inductance of the antenna device is relatively high, and by accessing the first capacitor 106 and the first inductor 105 connected in series, the first frequency band and the second frequency band corresponding to f1 and f2 are simultaneously matched.

Optionally, the antenna device further includes: a first exciting piece 110 and a third feeding structure 111; the first exciting piece 110 is spaced apart from one side of the other end of the second antenna arm 102; The antenna arms 102 are coupled; the first exciting piece 110 is connected to the third feeding structure 111 .

Fig. 5a is a schematic diagram of a fourth structure of an antenna device provided by an embodiment of the present application, and Fig. 5b is a physical diagram of a fourth type of antenna device provided by an embodiment of the present application. The antenna devices shown in Fig. 5a and Fig. 5b are the same antenna device.

As shown in FIG. 5a, the embodiment of the antenna device in the figure is similar in structure to the aforementioned antenna device in FIG. 4a, and the antenna device in FIG. The actual figure shown in FIG. 5b also includes structures corresponding to those in FIG. 5a , which will not be repeated here.

The first excitation sheet 110 may be sheet metal, such as FPC (Flexible Printed Circuit, flexible circuit board), metal sheet, and the like. Taking the antenna device formed by the breakpoint of the metal middle frame as an example for illustration, the first exciting piece 110 is spaced apart from one side of the other end of the second antenna arm 102, and it may be that the first exciting piece 110 is parallel to the second antenna The inner wall of the part of the metal middle frame corresponding to the arm 102, and the first excitation piece 110 and the second antenna arm 102 are not in direct contact, but are coupled to each other without contact.

The first exciting piece 110 is coupled to the second antenna arm 102, and the first exciting piece 110 is connected to the third feeding structure 111. From a functional point of view, the first exciting piece 110, the first antenna arm 101, and the second antenna can be connected to each other. The arm 102 and the third feeding structure 111 together serve as a third antenna, and the operating frequency band of the third antenna may be a high frequency band. The third antenna works in the high-frequency frequency band f5\f6, that is, f5 is the lowest frequency of the frequency band, and f6 is the highest frequency of the frequency band. The third antenna needs to be matched and isolated from the first antenna and the second antenna, and the matching isolation can be achieved by The third feeding structure 111 is realized by being connected with a matching circuit for high-pass and low-resistance signals.

It should be noted that the appearance of electronic equipment is highly valued by users of electronic equipment. If multiple breakpoints are set on the metal middle frame of electronic equipment to improve isolation, it will have a negative impact on the appearance of electronic equipment, thereby reducing the A user of an electronic device perceives the electronic device. The antenna device shown in Figure 5a does not increase the number of breakpoints in the metal middle frame, but increases the number of antennas and antenna frequency bands included in the antenna device by adding the first excitation sheet 110, which can expand the number of antennas included in the antenna device. The number of antennas included and the frequency band of the antennas also avoid setting multiple breakpoints in the metal middle frame to affect the aesthetics of electronic equipment.

During specific implementation, as shown in FIG. 1 , the antenna device may further include: a third exciting piece 115 and a fourth feeding structure 116; the third exciting piece 115 is spaced from one side of the other end of the first antenna arm 101; The three exciting pieces 115 are coupled to the first antenna arm 101 ; the third exciting piece 115 is connected to the fourth feeding structure 116 . From a functional point of view, the third exciting piece, the fourth feeding structure, the first antenna arm 101 and the second antenna arm 102 together constitute the fourth antenna. The fourth antenna can work in the ultra-high frequency band.

The ultra-high frequency band, high frequency band, intermediate frequency band, low frequency band and sub-low frequency band are arranged in descending order of frequency.

It should be noted that if the antenna device includes both the third high-frequency antenna and the fourth ultra-high frequency antenna, that is, the fourth antenna works at the ultra-high frequency f7\f8, that is, f7 is the lowest frequency of the frequency band, and f8 is the The highest frequency of the band. Then the matching circuit corresponding to the third antenna needs to be changed so that it can only receive signals whose frequency is in the high-frequency band f5\f6, that is, the matching circuit has a band-pass characteristic, and its performance will be slightly worse. The matching circuit corresponding to the fourth antenna has the characteristics of high pass and low resistance. High-pass low-resistance means that high-frequency signals can pass through, and low-frequency signals will be blocked. The matching circuit corresponding to the fourth antenna here is specifically, only the signals of the UHF frequency band f7\f8 can pass through, and the signals lower than f7 will be intercepted.

FIG. 11 is a schematic diagram of S parameters of an antenna device provided by an embodiment of the present application.

S parameters are network parameters based on the relationship between incident waves and reflected waves. They are used for the analysis of microwave radio frequency circuits. The microwave network is described by the reflected signal at the device port and from the port to another port. Here, the S parameter can be regarded as a characteristic parameter reflecting the working effect of each antenna included in the antenna device.

Referring to FIG. 11 , S11 corresponds to the aforementioned f1\f2, S22 corresponds to f3\f4, S33 corresponds to f5\f6, and S44 corresponds to f7\f8.

Next, referring to FIG. 6a and FIG. 6b , another embodiment of an antenna device will be described in detail, and the antenna device can be applied to an electronic device with a folding screen structure.

Inside an electronic device with a foldable screen structure, the hinge structure may occupy a lot of space. As shown in FIG. In an embodiment of an antenna device with a rotating shaft structure, the rotating shaft structure occupies the space near the second position and occupies the original space of the second feeding structure 104, so that the antenna device cannot adopt the second protruding structure 109, and the position of the second feeding structure 104 is forced to move to the left. The second feed structure 104 is too far from the ground point.

Optionally, the antenna device further includes: a first exciting piece 110, a second exciting piece 112, and a third feeding structure 111; the first exciting piece 110 and the second exciting piece 112 are formed by the second antenna arm 102 The direction from the other end of the second antenna arm 102 to one end of the second antenna arm 102 is set in sequence; the first exciting piece 110 is spaced from one side of the other end of the second antenna arm 102; the second exciting piece 112 is spaced from the second antenna arm 102 Setting; the first exciting piece 110 is coupled with the second antenna arm 102; the second exciting piece 112 is coupled with the second antenna arm 102; the first exciting piece 110 is connected with the third feeding structure 111; the second exciting piece 112 is connected with the second The feed structure 104 is connected.

The second excitation sheet 112 may be sheet metal, such as FPC, metal sheet, and the like. The second exciting piece 112 is not in direct contact with the second antenna arm 102 , but is coupled to each other without contact.

As shown in FIG. 6 a , the second excitation sheet 112 is disposed on the right side of the first excitation sheet 110 . The first exciting piece 110 is spaced from one side of the other end of the second antenna arm 102 ; the second exciting piece 112 is spaced from the second antenna arm 102 . Here, the second exciting piece 112 is coupled with the second antenna arm, so that the second feeding structure 104 connected to the second exciting piece 112 indirectly feeds the second antenna arm 102 through the second exciting piece 112, and the feeding The electrical effect can be regarded as moving the second feeding structure 104 to the right, shortening the distance between the second feeding structure and the grounding point. Therefore, the embodiment of the antenna device overcomes the problem that the position of the second feeding structure 104 is forced to move to the left due to the influence of the space occupied by the rotating shaft structure, which causes the second feeding structure 104 to be too far away from the grounding point. The actual figure shown in FIG. 6b also includes structures corresponding to those in FIG. 6a , which will not be repeated here.

Other parts in the embodiment of the antenna device in Fig. 6a are similar to the antenna device shown in Fig. 5a, and will not be repeated here. On the basis of Fig. 6a, the present application can also provide an embodiment of an antenna device with a rotating shaft structure, the rotating shaft structure occupies the space near the first position, and occupies the original space of the first feeding structure 103, so that The antenna device cannot adopt the first protruding structure 108, and the position of the first feeding structure 103 is forced to move to the right, so that the first feeding structure 103 is too far away from the grounding point. The technical concept of this embodiment is similar to that of the embodiment shown in FIG. 6 a , which will not be repeated here.

Optionally, the length of the second excitation sheet 112 is greater than the length of the first excitation sheet 110 .

The second excitation sheet 112 may be a metal sheet with the same structure and material as the first excitation sheet 110, but with a different length.

Next, referring to Fig. 7a, Fig. 7b and Fig. 8, another embodiment of the antenna device will be described in detail. In the embodiment of the antenna device, the first feeding structure 103 is connected to two different matching circuits.

Optionally, the antenna device further includes: a first matching circuit 113 and a second matching circuit 114; the first feeding structure 103 is connected to the first matching circuit 113; the first matching circuit 113 is used to obtain signals of multiple frequency bands The signal of the first frequency band and the signal of the second frequency band are obtained by filtering in the middle, and the signal of the first frequency band and the signal of the second frequency band are sent to the first feeding structure; the first feeding structure is connected with the second matching circuit; the second The matching circuit is used to filter the acquired signals of multiple frequency bands to obtain the signal of the fourth frequency band, and send the signal of the third frequency band to the first feeding structure.

Fig. 7a is a schematic diagram of a sixth structure of an antenna device provided by an embodiment of the present application. Fig. 7b is a sixth physical diagram of the antenna device provided by an embodiment of the present application.

As shown in FIG. 7a, the first matching circuit 113 includes a first input terminal 1131, a third capacitor 1133 and a second inductor 1132 connected in series in sequence, and has the characteristics of low-pass and high-impedance, and is used to obtain signals from multiple frequency bands. The signal of the first frequency band and the signal of the second frequency band are obtained by middle filtering, and the signal of the first frequency band and the signal of the second frequency band are sent to the first feeding structure. The first frequency band may be a sub-low frequency band, and the second frequency band may be a low frequency band. The physical figure shown in FIG. 7b also includes structures corresponding to those in FIG. 7a , which will not be repeated here.

Here, the first feeding structure 103 is connected to two different matching circuits, so that the first antenna arm can serve as a part of the first antenna and the third antenna at the same time, wherein, when the first antenna arm 101 serves as a part of the first antenna Part of the time, it works in the first frequency band and the second frequency band, that is, the sub-low frequency band and the low frequency band. When the first antenna arm 101 is used as a part of the third antenna, it works in the fourth frequency band, that is, the high frequency band.

FIG. 8 is a schematic circuit diagram of a first matching circuit in an antenna device provided by an embodiment of the present application. A specific implementation of the first matching circuit can be referred to FIG. 8 , the first input terminal 1131, the third capacitor 1133 and the second inductor 1132 are connected in series in sequence, and the first feed structure 103 is connected in series through the first capacitor 106 and The first inductor 105 is grounded, and the first feed structure 103 is also grounded through the fourth inductor 1134 .

In the first matching circuit, the intermediate frequency signal and the high frequency signal are filtered out through the third capacitor 1133 and the second inductor 1132 connected in series to obtain the signal of the sub-low frequency band and the signal of the low frequency band; the first feed structure 103 is connected in series The first capacitor 106 and the first inductance 105 are grounded, which can improve the parasitic resonant frequency of the first antenna arm 101 as the parasitic part of the second antenna arm 102 to the intermediate frequency band, thereby improving the signal transmission and signal reception of the second antenna Working capability during work: the first feed structure 103 is also grounded through the fourth inductor 1134 , which can fine-tune the filtered sub-low frequency band signal and low frequency band signal.

The second matching circuit 114 includes a second input terminal 1141, a fourth capacitor 1142 and a third inductance 1143, the second input terminal 1141 is grounded through the third inductance 1143, and the second input terminal is connected to the fourth capacitor 1142, and the fourth capacitor 1142 Connected to the first feed structure 103, the second matching circuit 114 has the characteristics of high-pass and low-resistance, and is used to filter the obtained signals of multiple frequency bands to obtain the signal of the fourth frequency band, and send the signal of the fourth frequency band to In the first feeding structure 103, the fourth frequency band may be a high frequency band.

During specific implementation, the second inductance 1132 included in the first matching circuit 113 can be an inductance device with a large inductance value, which can isolate the high-frequency energy transmitted from the second matching circuit; the third inductance included in the second matching circuit 114 The inductance 1143 can be a small inductance connected in parallel, which can isolate the low-frequency and sub-low-frequency energy transmitted from the first matching circuit. Therefore, even if the first feeding structure 103 is connected to two different matching circuits at the same time, signals of different frequency bands will not Confusion arises.

Based on the antenna device disclosed in the embodiment of the present application, the embodiment of the present application further discloses an electronic device, and the disclosed electronic device includes the above-mentioned antenna device. The electronic device referred to in the embodiment of the present application may be a smart phone, a tablet computer, an e-book reader, a wearable device, etc., and the embodiment of the present application does not limit the specific type of electronic device. FIG. 12 is a schematic diagram of a hardware structure of an electronic device provided by an embodiment of the present application.

The electronic device 1200 includes, but is not limited to: a radio frequency unit 1201, a network module 1202, an audio output unit 1203, an input unit 1204, a sensor 1205, a display unit 1206, a user input unit 1207, an interface unit 1208, a memory 1209, and a processor 1210, etc. part.

Those skilled in the art can understand that the electronic device 1200 can also include a power supply (such as a battery) for supplying power to various components, and the power supply can be logically connected to the processor 1210 through the power management system, so that the management of charging, discharging, and function can be realized through the power management system. Consumption management and other functions. The structure of the electronic device shown in FIG. 12 does not constitute a limitation to the electronic device. The electronic device may include more or fewer components than shown in the figure, or combine some components, or arrange different components, and details will not be repeated here. .

It should be understood that, in the embodiment of the present application, the input unit 1204 may include a graphics processor (Graphics Processing Unit, GPU) 12041 and a microphone 12042, and the graphics processor 12041 is used for the image capture device ( Such as the image data of the still picture or video obtained by the camera) for processing. The display unit 1206 may include a display panel 12061, and the display panel 12061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1207 includes a touch panel 12071 and other input devices 12072 . Touch panel 12071, also called touch screen. The touch panel 12071 may include two parts, a touch detection device and a touch controller. Other input devices 12072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be repeated here. The memory 1209 can be used to store software programs as well as various data, including but not limited to application programs and operating systems. The processor 1210 may integrate an application processor and a modem processor, wherein the application processor mainly processes operating systems, user interfaces, and application programs, and the modem processor mainly processes wireless communications. It can be understood that the foregoing modem processor may not be integrated into the processor 1210 .

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

An antenna device, comprising: a first antenna arm, a second antenna arm, a first feeding structure, and a second feeding structure; wherein:

The first antenna arm is connected to the first feeding structure;

The second antenna arm is connected to the second feeding structure;

One end of the first antenna arm is grounded;

One end of the second antenna arm is grounded;

The other end of the first antenna arm is spacedly coupled to the other end of the second antenna arm, and the length of the first antenna arm is greater than the length of the second antenna arm.
The antenna device according to claim 1, wherein,

The first feed structure is grounded through a first capacitor and a first inductor connected in series;

The second feed structure is grounded through a second capacitor.
The antenna device according to claim 1, wherein,

The first antenna corresponding to the first antenna arm works in a first frequency band and a second frequency band; the first frequency band is smaller than the second frequency band;

The difference between the spurious resonant frequency of the second antenna arm and the middle value of the second frequency band is smaller than a preset frequency threshold.
The antenna device according to claim 1, wherein,

The second antenna corresponding to the second antenna arm works in the third frequency band;

The spurious resonant frequency of the first antenna arm is located in the third frequency band.
The antenna device according to claim 4, wherein,

The first position on the first antenna arm is provided with a first raised structure; the distance between the first position and the other end of the first antenna arm is less than 1/4 wavelength of the third frequency band;

The first antenna arm is connected to the first feeding structure through the first protruding structure;

A second protruding structure is provided at a second position on the second antenna arm;

The second antenna arm is connected to the second feeding structure through the second protruding structure.
The antenna device according to claim 1, further comprising: a first exciting piece and a third feeding structure;

The first exciting piece is spaced apart from one side of the other end of the second antenna arm;

The first exciting piece is coupled to the second antenna arm;

The first exciting sheet is connected to the third feeding structure.
The antenna device according to claim 1, further comprising: a first exciting piece, a second exciting piece and a third feeding structure;

The first exciting piece and the second exciting piece are arranged in sequence along the direction from the other end of the second antenna arm to one end of the second antenna arm; the first exciting piece and the second antenna One side of the other end of the arm is spaced apart; the second exciting piece is spaced apart from the second antenna arm;

The first exciting piece is coupled to the second antenna arm;

The second exciting piece is coupled to the second antenna arm;

The first exciting sheet is connected to the third feeding structure;

The second exciting sheet is connected to the second feeding structure.
The antenna device according to claim 1, further comprising: a first matching circuit and a second matching circuit;

The first feeding structure is connected to the first matching circuit; the first matching circuit is used to obtain a signal of a first frequency band and a signal of a second frequency band from the obtained signals of a plurality of frequency bands, and convert the obtained sending the signal of the first frequency band and the signal of the second frequency band to the first feeding structure;

The first feeding structure is connected to the second matching circuit; the second matching circuit is used to filter the acquired signals of multiple frequency bands to obtain the signal of the fourth frequency band, and to obtain the signal of the third frequency band sent to the first feed structure.
The antenna device according to claim 7, wherein,

The length of the second excitation sheet is greater than the length of the first excitation sheet.
An electronic device, comprising the antenna device according to any one of claims 1-9.