Antenna and terminal device

Abstract

The utility model discloses an antenna and terminal equipment, and the antenna comprises a grounding part which is used for grounding; the excitation part is used for receiving signal excitation; the branch knot assembly comprises at least two branch knots, the lengths of the branch knots are different, and the branch knots are connected with the grounding part and the excitation part; the parasitic component comprises at least one parasitism, the parasitism is used for being grounded, the at least one parasitism is different from the at least two branches in length, and the at least one parasitism is coupled with the at least one branch. According to the invention, the problems of high cost, debugging difficulty and signal loss caused by an antenna switch can be avoided to a certain extent.

Description

Technical Field

[0001] The present application relates to the field of antenna technology, and in particular to an antenna and a terminal device. Background Art

[0002] As mobile communication technology continues to develop, mobile phones as mobile terminals are developing rapidly. The development of mobile communication technology from 1G to 5G has prompted the continuous replacement of mobile phones from "big brothers" to feature phones and now smart phones. However, the application and development of mobile communication technology in mobile terminals is not a simple update and replacement. Except for the abandonment of 1G network, the other generations of communication technology are still in use today. This means that 5G mobile phones need to take into account 2G, 3G, and 4G networks. The frequency bands of each generation of mobile communication technology are different, and the antennas required are also different.

[0003] From the perspective of mobile phone development, mobile phones are becoming thinner and lighter, while components such as batteries and cameras are becoming larger and larger, leaving less space for antennas. However, the number of antennas is increasing, which poses a great challenge to antenna design. Today, there are dozens of 5G mobile phone communication frequency bands. In order to reduce the number of antennas, multiple frequency bands must be merged into the same antenna, which means that the antenna must have two major characteristics: multi-band and wide bandwidth.

[0004] Current antennas usually include two branches of different lengths or one branch and one parasitic, and the frequency bands covered by current antennas are relatively few and narrow. In related technologies, antenna switches are usually used to achieve multi-band and wide-band antennas. However, antenna switches are not only expensive and difficult to debug, but also cause signal loss, which is especially serious in high-frequency and ultra-high-frequency bands. Utility Model Content

[0005] In view of the above-mentioned deficiencies in the related art, the present application provides an antenna and a terminal device to solve the problems of high cost, difficult debugging and signal loss caused by the use of an antenna switch in the related art.

[0006] In order to solve the above technical problems, in a first aspect, the present application provides an antenna, which includes:

[0007] A grounding portion, the grounding portion being used for grounding;

[0008] An excitation unit, the excitation unit is used to receive a signal excitation;

[0009] A branch assembly, wherein the branch assembly includes at least two branches, each of which has a different length, and each of which is connected to the grounding portion and the excitation portion;

[0010] A parasitic component, wherein the parasitic component includes at least one parasitic, the parasitic is used for grounding, the length of at least one parasitic is different from that of at least two of the branches, and at least one of the parasitic is coupled to at least one of the branches.

[0011] In a possible implementation manner of the first aspect, the branch assembly includes a long branch and a short branch, and at least one of the parasitic branches is different in length from the long branch and the short branch.

[0012] In a possible implementation manner of the first aspect, the antenna further includes a connecting portion, and the long branch and the short branch are both connected to the ground portion and the excitation portion through the connecting portion;

[0013] The length directions of the long branches and the short branches extend along the first direction, and the long branches and the short branches are arranged in sequence along a second direction perpendicular to the first direction. The long branches, the short branches and the connecting parts together form an inverted F-shaped structure.

[0014] In a possible implementation manner of the first aspect, the long branch node is L-shaped, and the long branch node includes a first long branch segment and a second long branch segment vertically connected to the first long branch segment, the first long branch segment and the long branch node have the same length in the first direction, and the first long branch segment is connected to the connecting portion;

[0015] and / or,

[0016] The short branch node is L-shaped, and includes a first short branch segment and a second short branch segment vertically connected to the first short branch segment. The first short branch segment and the short branch node have the same length in the first direction, and the first short branch segment is connected to the connecting portion.

[0017] In a possible implementation manner of the first aspect, the long branch node is L-shaped, and the long branch node includes a first long branch segment and a second long branch segment vertically connected to the first long branch segment, the first long branch segment and the long branch node have the same length in the first direction, and the first long branch segment is connected to the connecting portion;

[0018] The second long branch segment is arranged on a side of the first long branch segment close to the short branch segment in the second direction, and the long branch segment and the short branch segment are coupled to each other.

[0019] In a possible implementation of the first aspect, the parasitic is arranged on a side of the short branch away from the long branch in the second direction, the length of the parasitic in the first direction is less than the length of the short branch in the first direction, and the parasitic is coupled with the short branch.

[0020] In a possible implementation manner of the first aspect, the parasitic is arranged on a side of the short branch away from the long branch in the second direction, and the parasitic is coupled to the short branch.

[0021] In a possible implementation of the first aspect, the total length of the antenna is equal to the sum of the dimensions of the connecting portion and the long branch in the first direction, and the total length of the antenna is in the range of 23.2 mm-23.4 mm;

[0022] and / or,

[0023] The total width of the antenna is equal to the sum of the dimensions of the connecting portion and the grounding portion in the second direction, and the total width of the antenna is in the range of 9.9 mm to 10.1 mm.

[0024] In a second aspect, the present application further provides a terminal device, the terminal device comprising:

[0025] The antenna according to any one of the first aspects;

[0026] A metal piece, to which at least one antenna is connected, and the grounding portion and the parasitic in the antenna are connected to the metal piece so that the grounding portion and the parasitic are grounded.

[0027] In a possible implementation manner of the second aspect, two antennas are disposed on the same side of the metal piece, and a distance between the two antennas is in a range of 24.3 mm-24.5 mm.

[0028] Compared with the related art, this application has at least the following beneficial effects:

[0029] In the present application, since the branch component in the antenna includes at least two branches connected to the grounding part and the excitation part, and the lengths of the branches are different, and since the parasitic component in the antenna includes at least one parasitic for grounding, and the lengths of at least one parasitic and at least two branches are different, and at least one parasitic is coupled with at least one branch, compared with the related art, the antenna in the present application can not only generate at least three different frequency bands through at least two branches and at least one parasitic, but also increase the frequency band in the corresponding frequency band by coupling at least one parasitic with at least one of the at least two branches, so that the frequency band of the entire antenna can be wider and the covered frequency band is more complete, and the use of antenna switches can be avoided to a certain extent, thereby avoiding the problems of high cost, difficult debugging and signal loss caused by antenna switches to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 One of the structural schematic diagrams of the antenna provided in the embodiment of the present application;

[0032] Figure 2 One of the return loss curves of the antenna provided in the embodiment of the present application;

[0033] Figure 3 One of the current distribution diagrams of the antenna provided in the embodiment of the present application;

[0034] Figure 4 The second return loss curve diagram of the antenna provided in the embodiment of the present application;

[0035] Figure 5 The second current distribution diagram of the antenna provided in the embodiment of the present application;

[0036] Figure 6 The third return loss curve diagram of the antenna provided in the embodiment of the present application;

[0037] Figure 7 The third current distribution diagram of the antenna provided in the embodiment of the present application;

[0038] Figure 8 The second structural diagram of the antenna provided in the embodiment of the present application;

[0039] Fig. 9 A fourth return loss curve diagram of the antenna provided in an embodiment of the present application;

[0040] Fig.10 A schematic diagram of a partial structure of a terminal device provided in an embodiment of the present application.

[0041] Description of reference numerals:

[0042] 1- grounding part;

[0043] 2- Motivation Department;

[0044] 3-branch component;

[0045] 31- long branch node; 311- first long branch segment; 312- second long branch segment;

[0046] 32-short branch node; 321-first short branch node segment; 322-second short branch node segment;

[0047] 4-parasitic components; 41-parasitic;

[0048] 5-Connection part;

[0049] 100-antenna; 200-metal parts. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0051] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0052] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0053] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0054] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0055] As described in the background technology of this application, in the related technologies, with the continuous development and change of mobile communication technology, mobile phones as mobile terminals have developed rapidly. The development of mobile communication technology from 1G to 5G has prompted the continuous replacement of mobile phones from "big brothers" to feature phones and then to today's smart phones. However, the application and development of mobile communication technology in mobile terminals is not a simple update and replacement. Except for the abandonment of 1G network, the other generations of communication technology are still in use today. This means that 5G mobile phones need to take into account 2G, 3G, and 4G networks, and the frequency bands of each generation of mobile communication technology are different, and the antennas required are also different.

[0056] From the perspective of mobile phone development, mobile phones are becoming thinner and lighter, while components such as batteries and cameras are becoming larger and larger, leaving less space for antennas. However, the number of antennas is increasing, which poses a great challenge to antenna design. Today, there are dozens of 5G mobile phone communication frequency bands. In order to reduce the number of antennas, multiple frequency bands must be merged into the same antenna, which means that the antenna must have two major characteristics: multi-band and wide bandwidth.

[0057] Current antennas usually include two branches of different lengths or one branch and one parasitic, and the frequency bands covered by current antennas are relatively few and narrow. In related technologies, antenna switches are usually used to achieve multi-band and wide-band antennas. However, antenna switches are not only expensive and difficult to debug, but also cause signal loss, which is especially serious in high-frequency and ultra-high-frequency bands.

[0058] Embodiment 1

[0059] In view of the above-mentioned problems, the present application provides an antenna to solve the problems of high cost, difficult debugging and signal loss caused by the use of antenna switches in the related art.

[0060] The technical solution of the present application will be further described below in conjunction with specific embodiments and drawings:

[0061] like Figure 1 As shown, the antenna 100 includes a grounding portion 1, an excitation portion 2, a branch component 3, and a parasitic component 4, wherein the grounding portion 1 is used for grounding, and the excitation portion 2 is used for receiving signal excitation. The branch component 3 includes at least two branches, each branch has a different length, and each branch is connected to the grounding portion 1 and the excitation portion 2. The parasitic component 4 includes at least one parasitic 41, the parasitic 41 is used for grounding, the length of at least one parasitic 41 is different from that of at least two branches, and at least one parasitic 41 is coupled to at least one branch.

[0062] In the present application, since the branch component 3 in the antenna 100 includes at least two branches connected to the grounding part 1 and the excitation part 2, and the lengths of the branches are different, and since the parasitic component 4 in the antenna 100 includes at least one parasitic 41 for grounding, and the length of at least one parasitic 41 is different from that of at least two branches, and at least one parasitic 41 is coupled with at least one branch, compared with the related art, the antenna 100 in the present application can not only generate at least three different frequency bands through at least two branches and at least one parasitic 41, but also increase the frequency band in the corresponding frequency band through the coupling of at least one parasitic 41 with at least one of the at least two branches, so that the frequency band of the entire antenna 100 can be wider and the frequency band covered is more complete, and the use of antenna switches can be avoided to a certain extent, thereby avoiding the problems of high cost, difficult debugging and signal loss caused by antenna switches to a certain extent.

[0063] Further, in a preferred embodiment, Figure 1 As shown, the branch assembly 3 includes a long branch 31 and a short branch 32 , and the length of at least one parasite 41 is different from that of the long branch 31 and the short branch 32 .

[0064] A long branch 31 and a short branch 32 are set, which not only can generate at least three different frequency bands through a long branch 31, a short branch 32 and at least one parasitic 41, but also can reduce the number of branches set in the branch component 3, which is beneficial to the miniaturized design of the antenna 100.

[0065] In other embodiments, the branch component 3 may also include three, four or more branches of different lengths. The number of branches is flexible and can be set according to actual usage requirements. This embodiment of the present application will not be elaborated in detail.

[0066] Further, in a preferred embodiment, Figure 1 As shown, the antenna 100 further includes a connecting portion 5, and the long branch 31 and the short branch 32 are both connected to the grounding portion 1 and the excitation portion 2 through the connecting portion 5;

[0067] The length directions of the long branch nodes 31 and the short branch nodes 32 are both along the first direction ( Figure 1 The long branch nodes 31 and the short branch nodes 32 extend in a second direction ( Figure 1 The long branches 31, the short branches 32 and the connecting portion 5 together form an inverted F-shaped structure.

[0068] The long branch nodes 31, the short branch nodes 32 and the connecting portion 5 together form an inverted F-shaped structure, so that the antenna 100 can become an IFA (Inverted-F Antenna, IFA for short) structure antenna. Since the IFA structure antenna has the advantages of small size, simple structure, and low manufacturing cost, setting the antenna 100 as an IFA structure antenna is not only conducive to miniaturization of the antenna 100, but also conducive to the processing of the antenna 100, and is conducive to reducing the manufacturing cost of the antenna 100. In addition, since the IFA structure antenna is easy to match, setting the antenna 100 as an IFA structure antenna can also improve the matching efficiency of the antenna 100.

[0069] In other embodiments, the antenna 100 may also be a PIFA (planer inverted-F antenna, PIFA for short) structure antenna or a MONOPOLE structure antenna. The type of antenna 100 may be selected flexibly. Specifically, it may be selected according to actual usage requirements. This embodiment of the present application will not be elaborated on in detail.

[0070] Furthermore, if Figure 1 As shown, the long branch node 31 is L-shaped, and the long branch node 31 includes a first long branch segment 311 and a second long branch segment 312 vertically connected to the first long branch segment 311. The first long branch segment 311 and the long branch node 31 have the same length in the first direction, and the first long branch segment 311 is connected to the connecting portion 5; and / or, as Figure 1 As shown, the short branch node 32 is L-shaped, and the short branch node 32 includes a first short branch segment 321 and a second short branch segment 322 vertically connected to the first short branch segment 321. The first short branch segment 321 and the short branch node 32 have the same length in the first direction, and the first short branch segment 321 is connected to the connecting portion 5.

[0071] The long branch nodes 31 and / or the short branch nodes 32 are arranged to be L-shaped, which not only ensures the overall length of the long branch nodes 31 and / or the short branch nodes 32, but also reduces the space occupied by the long branch nodes 31 and / or the short branch nodes 32 in the first direction, which is conducive to the arrangement of the long branch nodes 31 and / or the short branch nodes 32, and further facilitates the arrangement of the antenna 100 when the arrangement space in the terminal device is reduced.

[0072] In a preferred embodiment, Figure 1As shown, the long branch node 31 is L-shaped, and the long branch node 31 includes a first long branch segment 311 and a second long branch segment 312 vertically connected to the first long branch segment 311. The first long branch segment 311 and the long branch node 31 have the same length in the first direction, and the first long branch segment 311 is connected to the connecting portion 5. The short branch node 32 is also L-shaped, and the short branch node 32 includes a first short branch segment 321 and a second short branch segment 322 vertically connected to the first short branch segment 321. The first short branch segment 321 and the short branch node 32 have the same length in the first direction, and the first short branch segment 321 is connected to the connecting portion 5.

[0073] Such a configuration can reduce the space occupied by the long branches 31 and the short branches 32 in the first direction, which is conducive to facilitating the arrangement of the long branches 31 and the short branches 32, and further facilitates the arrangement of the antenna 100 when the arrangement space in the terminal device is reduced.

[0074] Further, the long branch section 31 is L-shaped, and the long branch section 31 includes a first long branch section 311 and a second long branch section 312 vertically connected to the first long branch section 311. The first long branch section 311 and the long branch section 31 have the same length in the first direction, and the first long branch section 311 is connected to the connecting portion 5. On the basis of the above, the second long branch section 312 is arranged on the side of the first long branch section 311 close to the short branch section 32 in the second direction, and the long branch section 31 and the short branch section 32 are coupled to each other.

[0075] The second long branch segment 312 is arranged in the second direction on the side of the first long branch segment 311 close to the short branch segment 32 so that the long branch segment 31 and the short branch segment 32 are coupled with each other. This can widen the frequency band corresponding to the long branch segment 31 and the short branch segment 32, thereby widening the frequency band of the entire antenna 100.

[0076] In a preferred embodiment, the frequency band corresponding to the long branch 31 is a medium frequency band, and the frequency band is 1.9 GHz-2.7 GHz. Figure 2 As shown in the figure, the horizontal axis is frequency, the vertical axis is return loss, and the resonant frequency in the 1.9GHz-2.7GHz frequency band is 2.37GHz. Figure 3 As shown, when the antenna 100 resonates at 2.37 GHz, the current intensity at the end of the long stub 31 is the largest, and coupling occurs between the long stub 31 and the short stub 32 .

[0077] like Figure 4 As shown in the figure, the meaning of the horizontal and vertical axes is the same as Figure 2 Similarly, the frequency band corresponding to the short branch 32 is a high frequency band, and the resonant frequency point of this frequency band is about 3.47 GHz. Figure 5As shown, when the antenna 100 resonates at 3.47 GHz, the current intensity at the connection between the first short branch segment 321 and the second short branch segment 322 in the short branch segment 32 is the largest, that is, the current intensity at the bend of the short branch segment 32 is the largest, and a low-intensity coupling is generated between the short branch segment 32 and the long branch segment 31.

[0078] In a preferred embodiment, Figure 1 As shown, the second short branch segment 322 is arranged in the second direction on the side of the first short branch segment 321 away from the long branch segment 31. Such an arrangement optimizes the arrangement between the short branch segment 32 and the long branch segment 31, and can avoid interference between the short branch segment 32 and the long branch segment 31 to a certain extent, thereby facilitating the arrangement between the short branch segment 32 and the long branch segment 31.

[0079] For the second long branch segment 312, in other embodiments, the second long branch segment 312 can also be arranged on the side of the first long branch segment 311 away from the short branch segment 32 in the second direction. Such an arrangement optimizes the arrangement between the short branch segment 32 and the long branch segment 31, and can avoid interference between the short branch segment 32 and the long branch segment 31 to a certain extent, thereby facilitating the arrangement between the short branch segment 32 and the long branch segment 31.

[0080] As for the second short branch segment 322, in other embodiments, the second short branch segment 322 can also be arranged on the side of the first short branch segment 321 close to the long branch segment 31 in the second direction. Such arrangement can make the long branch segment 31 and the short branch segment 32 close to each other to a certain extent, thereby facilitating the coupling effect between the long branch segment 31 and the short branch segment 32.

[0081] In a preferred embodiment, Figure 1 As shown, the parasitic component 4 includes a parasitic 41 , and the parasitic 41 is coupled to the long stub 31 or the short stub 32 .

[0082] With such a configuration, not only can three different frequency bands be generated through a parasitic 41, a long branch 31 and a short branch 32, but the frequency band of the corresponding frequency band can also be widened through the coupling of the parasitic 41 with the long branch 31 or the short branch 32, that is, it can ensure that the entire antenna 100 has a wider frequency band and more frequency bands, and at the same time, it can also make the parasitic component 4 have fewer parasitics 41 and simplify the parasitic component 4.

[0083] In other embodiments, the parasitic component 4 may also include two parasitics 41 of different lengths, and the two parasitics 41 are respectively coupled with the long stub 31 and the short stub 32. Such a configuration can not only further increase the number of frequency bands of the antenna 100, but also widen the frequency band of the corresponding frequency band through the coupling of the two parasitics 41 with the long stub 31 and the short stub 32, thereby further widening the frequency band of the entire antenna 100.

[0084] Furthermore, if Figure 1 As shown, the parasite 41 is arranged on the side of the short stub 32 away from the long stub 31 in the second direction, the length of the parasite 41 in the first direction is smaller than the length of the short stub 32 in the first direction, and the parasite 41 is coupled to the short stub 32 .

[0085] By arranging the parasitic 41 on the side of the short branch 32 away from the long branch 31 in the second direction, the long branch 31, the short branch 32 and the parasitic 41 can be arranged in sequence along the second direction. Since the length of the short branch 32 in the first direction is smaller than the length of the long branch 31, and the length of the parasitic 41 in the first direction is smaller than the length of the short branch 32, such an arrangement can also arrange the frequency bands corresponding to the long branch 31, the short branch 32 and the parasitic 41 in a manner of gradually increasing frequency, thereby optimizing the frequency band distribution of the entire antenna 100.

[0086] By coupling the parasitic 41 with the short stub 32 , the frequency band of the high frequency band corresponding to the parasitic 41 and the short stub 32 can be widened, thereby further widening the frequency band of the entire antenna 100 .

[0087] In a preferred embodiment, the coupling between the parasitic 41 and the short branch 32 forms a larger frequency band, and the frequency band includes the high frequency band corresponding to the short branch 32 and the ultra-high frequency band corresponding to the parasitic 41. The frequency band is 3.3GHz-5GHz, with a bandwidth of 1.7GHz. Such a large bandwidth is formed by the W waveform generated by the high frequency resonance and the ultra-high frequency resonance. Figure 4 As shown, the high frequency resonant frequency is about 3.47 GHz. Figure 6 As shown in the figure, the meaning of the horizontal and vertical axes is the same as Figure 2 Similarly, the resonant frequency of the ultra-high frequency is about 4.78GHz. Figure 7 As shown, when the antenna 100 resonates at 4.78 GHz, ultra-high frequency resonance is generated at the end of the parasitic, the end current intensity of the parasitic 41 is the largest, and coupling is generated between the parasitic 41 and the short stub 32 .

[0088] like Figure 8 As shown, the total length L of the antenna 100 is equal to the length of the connecting portion 5 and the long branch 31 in the first direction ( Figure 8 The sum of the dimensions in the X direction in the antenna 100, and the total length L of the antenna 100 is in the range of 23.2 mm to 23.4 mm; and / or the total width B of the antenna 100 is equal to the width of the connecting portion 5 and the grounding portion 1 in the second direction ( Figure 8 The sum of the dimensions in the Y direction (in the Y direction), and the total width B of the antenna 100 is in the range of 9.9mm-10.1mm.

[0089] Such a configuration can make the antenna 100 have a relatively small size, can reduce the space occupied by the antenna 100, is conducive to facilitating the arrangement of the antenna 100, and at the same time, to a certain extent, can also ensure that the antenna 100 has a suitable radiation frequency.

[0090] In a preferred embodiment, the total length L of the antenna 100 is equal to 23.3 mm, and the total width B of the antenna 100 is equal to 10 mm. This configuration can further optimize the overall size of the antenna 100, not only ensuring that the antenna 100 has a relatively small size, but also further ensuring that the antenna 100 has a suitable radiation frequency.

[0091] Regarding the total length L of the antenna 100, in other embodiments, the total length L of the antenna 100 may also be 23.2 mm or 23.4 mm. The total length L of the antenna 100 is flexible to set, and can be set according to actual usage requirements. This embodiment of the present application will not be elaborated in detail.

[0092] Regarding the total width B of the antenna 100, in other embodiments, the total width B of the antenna 100 may also be 9.9 mm or 10.1 mm. The total width B of the antenna 100 is flexible to set, and can be set according to actual usage requirements. This embodiment of the present application will not be elaborated on in detail.

[0093] It should be noted that the length, width, spacing and other dimensions of the long branch 31, the short branch 32 and the parasite 41 can be fine-tuned according to the specific usage scenario of the antenna 100, and this embodiment of the present application will not be elaborated in detail.

[0094] like Fig. 9 As shown in the figure, the meaning of the horizontal and vertical axes is the same as Figure 2 Similarly, the return losses of the antenna 100 at 1.9 GHz-2.7 GHz and 3.3 GHz-5 GHz are both less than -5 dB, meeting the design requirements of the antenna 100 in engineering.

[0095] Embodiment 2

[0096] The present application also provides a terminal device, such as Figure 1 and Fig.10 As shown, the terminal device includes an antenna 100 and a metal part 200, wherein the antenna 100 has the same structure as any of the antennas 100 in the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description in the above embodiments, and this embodiment will not be repeated here. At least one antenna 100 is connected to the metal part 200, and the grounding part 1 and the parasitic 41 in the antenna 100 are connected to the metal part 200 to ground the grounding part 1 and the parasitic 41.

[0097] In the present application, since the branch component 3 in the antenna 100 includes at least two branches connected to the grounding part 1 and the excitation part 2, and the lengths of the branches are different, and since the parasitic component 4 in the antenna 100 includes at least one parasitic 41 for grounding, and the length of at least one parasitic 41 is different from that of at least two branches, and at least one parasitic 41 is coupled with at least one branch, compared with the related art, the antenna 100 in the present application can not only generate at least three different frequency bands through at least two branches and at least one parasitic 41, but also increase the frequency band in the corresponding frequency band through the coupling of at least one parasitic 41 with at least one of the at least two branches, so that the frequency band of the entire antenna 100 can be wider and the covered frequency band is more complete, and the use of antenna switches can be avoided to a certain extent, thereby avoiding the problems of high cost, difficult debugging and signal loss caused by antenna switches to a certain extent.

[0098] As for the terminal device, in the embodiment of the present application, the terminal device can be a mobile phone, a tablet or other device. The type of terminal device can be selected flexibly. Specifically, it can be selected according to actual needs. The embodiment of the present application will not be elaborated in detail.

[0099] Furthermore, if Fig.10 As shown, two antennas 100 are disposed on the same side of the metal member 200 , and a distance H between the two antennas 100 is in the range of 24.3 mm-24.5 mm.

[0100] Such an arrangement can ensure that the two antennas 100 arranged on the same side have an appropriate degree of isolation, thereby ensuring the degree of mutual interference between the two antennas 100, which is beneficial to ensuring the communication quality.

[0101] In a preferred embodiment, the distance H between the two antennas 100 disposed on the same side of the metal member 200 is 24.4 mm. This arrangement can provide better isolation between the two antennas 100 disposed on the same side, thereby further ensuring the degree of mutual interference between the two antennas 100, which is conducive to further ensuring communication quality.

[0102] In other embodiments, the distance H between the two antennas 100 arranged on the same side of the metal part 200 can also be 24.3 mm or 24.5 mm. The setting of the distance H is relatively flexible. Specifically, it can be set according to actual usage requirements, and the embodiments of the present application will not be elaborated on this.

[0103] In a preferred embodiment, Fig.10As shown, the metal member 200 is a metal plate, and two antennas 100 are arranged opposite and spaced apart on opposite sides of the metal plate, that is, a total of four antennas 100 are arranged on the metal plate. Such an arrangement can expand the radiation range of the antenna 100 in the terminal device, can reduce the influence of external factors on the radiation of the antenna 100, and is conducive to enhancing the communication effect of the terminal device.

[0104] like Fig.10 As shown, among the four antennas 100 arranged on the metal part 200, any antenna 100 is far away from the other two antennas 100 on the opposite side, and the isolation is less than -35dB. The two antennas 100 on the same side have a maximum isolation of -10.24dB at 2.37GHz. The above isolation is less than the required -10dB, which meets the working requirements.

[0105] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An antenna, characterized in that: include: A grounding portion, the grounding portion being used for grounding; An excitation unit, the excitation unit is used to receive a signal excitation; A branch assembly, wherein the branch assembly includes at least two branches, each of which has a different length, and each of which is connected to the grounding portion and the excitation portion; A parasitic component, wherein the parasitic component includes at least one parasitic, the parasitic is used for grounding, the length of at least one parasitic is different from that of at least two of the branches, and at least one of the parasitic is coupled to at least one of the branches.

2. The antenna according to claim 1, characterized in that The branch assembly includes a long branch and a short branch, and at least one of the parasitic branches is different in length from the long branch and the short branch.

3. The antenna according to claim 2, characterized in that: The antenna further comprises a connecting portion, through which the long branch and the short branch are connected to the grounding portion and the excitation portion; The length directions of the long branches and the short branches extend along the first direction, and the long branches and the short branches are arranged in sequence along a second direction perpendicular to the first direction. The long branches, the short branches and the connecting parts together form an inverted F-shaped structure.

4. The antenna according to claim 3, characterized in that: The long branch node is L-shaped, and includes a first long branch segment and a second long branch segment vertically connected to the first long branch segment, the first long branch segment and the long branch node have the same length in the first direction, and the first long branch segment is connected to the connecting portion; and / or, The short branch node is L-shaped, and includes a first short branch segment and a second short branch segment vertically connected to the first short branch segment. The first short branch segment and the short branch node have the same length in the first direction, and the first short branch segment is connected to the connecting portion.

5. The antenna according to claim 4, characterized in that: The second long branch segment is arranged on a side of the first long branch segment close to the short branch segment in the second direction, and the long branch segment and the short branch segment are coupled to each other.

6. The antenna according to any one of claims 3 to 5, characterized in that: The parasitic component includes a parasitic coupled to the long stub or the short stub.

7. The antenna according to claim 6, characterized in that The parasite is arranged on a side of the short branch away from the long branch in the second direction, the length of the parasite in the first direction is smaller than the length of the short branch in the first direction, and the parasite is coupled with the short branch.

8. The antenna according to any one of claims 3 to 5, characterized in that: The total length of the antenna is equal to the sum of the dimensions of the connecting portion and the long branch in the first direction, and the total length of the antenna is in the range of 23.2 mm to 23.4 mm; and / or, The total width of the antenna is equal to the sum of the dimensions of the connecting portion and the grounding portion in the second direction, and the total width of the antenna is in the range of 9.9 mm to 10.1 mm.

9. A terminal device, characterized in that: include: The antenna according to any one of claims 1 to 8; A metal piece, to which at least one antenna is connected, and the grounding portion and the parasitic in the antenna are connected to the metal piece so that the grounding portion and the parasitic are grounded.

10. The terminal device according to claim 9, characterized in that: Two antennas are arranged on the same side of the metal piece, and the distance between the two antennas is in the range of 24.3 mm-24.5 mm.

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