Terminal device

Abstract

Provided in the present application is a terminal device, comprising an antenna unit, a metal ground plane, and at least one choke structure. The antenna unit comprises a radiator, which resonates in a target band under the excitation of a feed signal, wherein the radiator is arranged adjacent to a first edge, and when a first feed source provides a first feed source signal to excite the radiator to resonate in the target band, the metal ground plane is coupled to the radiator to be excited to generate a current. The at least one choke structure comprises a choke structure which is connected to the first edge and satisfies a first positional relationship with a radiator projection of the radiator on the first edge, and / or the at least one choke structure comprises a choke structure which is connected to at least one of a second edge and a third edge and satisfies a second positional relationship with the radiator projection. The at least one choke structure resonates in the target band and is used for making the length of a current on the edge where the at least one choke structure in the metal ground plane is located be within a preset range. Therefore, the directivity or beam width of an antenna unit radiation pattern can be selectively improved.

Description

terminal equipment

[0001] This application claims priority to Chinese Patent Application No. 202410946328.6, filed on July 12, 2024, entitled “Terminal Equipment”, and to Chinese Patent Application No. 202410946328.6, filed on August 21, 2024, entitled “Terminal Equipment”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of communication technology, and in particular to a terminal device. Background Technology

[0003] The communication performance of terminal devices greatly affects the user experience, especially in certain scenarios, such as satellite communication. Some satellite communications require the terminal device's antenna radiation to have strong directionality, while other satellite communications require the terminal device's antenna radiation to have good omnidirectionality. The communication performance of existing terminal devices still needs to be improved. Summary of the Invention

[0004] Therefore, this application provides a terminal device to improve the communication performance of the terminal device.

[0005] This application provides a terminal device, comprising an antenna unit, a metal ground plane, and at least one choke structure; the antenna unit includes a radiator resonating in a target frequency band; the edge of the metal ground plane includes at least a first edge, a second edge, and a third edge, the radiator being disposed adjacent to the first edge, and the second edge and the third edge being connected to the first edge and angled together; when a first feed source provides a first feed source signal to excite the radiator to resonate in the target frequency band, the metal ground plane is coupled to the radiator and is excited to generate a current; the at least one choke structure includes a choke structure connected to the first edge and satisfying a first positional relationship with the radiator projection on the first edge; and / or, includes a choke structure connected to the second edge and the third edge. The system comprises at least one choke structure connected to the edge of the radiator projection and satisfying a second positional relationship with the radiator projection; the at least one choke structure resonates in the target frequency band; the first positional relationship is that the edge length between the connection position of the choke structure on the first edge and the target current point is p or mλ / 4±p, where m is an even number greater than 0, 0≤p≤λ / 10, and λ is the wavelength corresponding to the target frequency band; the second positional relationship is that the edge length between the connection position of the choke structure on the corresponding edge and the target current point is k or nλ / 4±k, where n is a positive integer, 0≤k≤λ / 10; in the non-radiator projection area on the edge of the metal floor, the current point closest to the radiator projection is the target current point, and the non-radiator projection area is the area outside the area where the radiator projection is located.

[0006] Since the choke structure can suppress current, the omnidirectional or directivity of the antenna element can be improved by making the edge length between the connection position of the choke structure on at least one of the second and third edges and the target current point a preset length, so that the phase difference between the maximum current on this edge and the maximum current on the first edge is the target phase difference. When the choke structure is connected to at least one of the second and third edges, and the edge length between the connection position of the choke structure on the corresponding edge and the target current point is k or nλ / 4±k, 0≤k≤λ / 10, and n is an even number, the phase difference between the maximum current on the first edge and the maximum current on the corresponding edge can be 54°~90°, thereby improving the directivity of the antenna element. When the choke structure is connected to at least one of the second edge and the third edge, and the edge length between the connection position of the choke structure on the corresponding edge and the target current point is nλ / 4±k, 0≤k≤λ / 10, where n is an odd number, the phase difference between the maximum current on the first edge and the maximum current on the corresponding edge can be 0°~36°, thereby improving the bandwidth of the antenna element, that is, improving the omnidirectionality of the antenna element. When the choke structure is connected to the first edge, and the edge length between the connection position of the choke structure on the first edge and the target current point is p or mλ / 4±p, where m is an even number greater than 0, 0≤p≤λ / 10, and λ is the wavelength corresponding to the target frequency band, the directivity of the antenna element can also be improved because the current in other regions on the first edge that is opposite to the projection region of the radiator is reduced.

[0007] In one possible implementation, the at least one choke structure is disposed in the metal floor, or disposed outside the metal floor and connected to the metal floor, or when there are two or more choke structures, at least one of the choke structures is disposed in the metal floor, and at least one of the choke structures is disposed outside the metal floor and connected to the metal floor.

[0008] In one possible implementation, when the choke structure is disposed in the metal floor, the choke structure is a choke groove formed by cutting a groove in the metal floor, and a portion of the choke groove is located on the corresponding edge.

[0009] In one possible implementation, when the choke structure is located outside the metal floor and connected to the metal floor, the choke structure includes metal branches, and the metal branches are connected to the corresponding edges of the metal floor.

[0010] In one possible implementation, the choke structure further includes a matching circuit, to which the metal stub is connected, such that the choke structure resonates in the target frequency band.

[0011] In one possible implementation, the choke structure may have a shape including at least one of an "L" shape, a "T" shape, and an "F" shape.

[0012] In one possible implementation, the choke structure is connected to at least one of the second edge and the third edge. The edge length between the connection position of the choke structure on the corresponding edge and the target current point is nλ / 4±k, where n is a positive odd number, 0≤k≤λ / 10. The choke structure is L-shaped and includes a first part parallel to the corresponding edge and a second part perpendicular to the corresponding edge. The first part and the second part are connected to form an L-shape. The first part includes a first end and a second end, and the second part includes a third end and a fourth end. The first end of the first part is connected to the third end of the second part, and the fourth end of the second part is connected to the corresponding edge. The first end is closer to the radiator than the second end.

[0013] In one possible implementation, the resonant mode corresponding to the radiator is a 1 / 2 wavelength mode, and the two current points closest to the projection of the radiator are located on both sides of the projection of the radiator, and the edge length between them and the midpoint of the projection of the radiator is λ / 4.

[0014] In one possible implementation, the resonant mode corresponding to the radiator is a 1 / 4 wavelength mode, and the two current points closest to the projection of the radiator are located on both sides of the projection of the radiator, and the edge length between them and the projection position of the ground point of the radiator on the first edge is λ / 2.

[0015] In one possible implementation, the at least one choke structure includes a first choke structure connected to either the second edge or the third edge. The edge length between the connection position of the first choke structure on the corresponding edge and the target current point is k1 or n1λ / 4±k1, where n1 is a positive integer and 0≤k1≤λ / 10.

[0016] In one possible implementation, the at least one choke structure further includes a second choke structure. The first choke structure is connected to either the second edge or the third edge. The second choke structure is connected to either the second edge or the third edge. The edge length between the connection position of the second choke structure on the corresponding edge and the target current point is k2 or n2λ / 4±k2, where n2 is a positive integer and 0≤k2≤λ / 10.

[0017] In one possible implementation, the first choke structure is connected to the second edge, the second choke structure is connected to the third edge, n1 = n2, and the projections of the first choke structure and the second choke structure on the second edge at least partially overlap.

[0018] In one possible implementation, the at least one choke structure further includes a third choke structure, which is connected to either the second edge or the third edge, and the edge length between the connection position of the third choke structure on the corresponding edge and the target current point is k3 or n3λ / 4±k3, where n3 is a positive integer and 0≤k3≤λ / 10.

[0019] In one possible implementation, the at least one choke structure further includes a fourth choke structure, the third choke structure is connected to the second edge, the fourth choke structure is connected to the third edge, and the edge length between the connection position of the fourth choke structure on the corresponding edge and the target current point is k4 or n4λ / 4±k4, and the projections of the third choke structure and the fourth choke structure on the second edge at least partially overlap, wherein n3=n4, 0≤k4≤λ / 10.

[0020] In one possible implementation, the first choke structure, the second choke structure, the third choke structure, and the fourth choke structure are all "L"-shaped, and the first end of the first portion of the first choke structure and the second choke structure is closer to the first edge than the second end, and the first end of the first portion of the third choke structure and the fourth choke structure is farther away from the first edge than the second end.

[0021] In one possible implementation, the first choke structure includes a first metal stub and a first switching unit, the first switching unit being connected between the first metal stub and the metal ground; the second choke structure includes a second metal stub and a second switching unit, the second switching unit being connected between the second metal stub and the metal ground; the third choke structure includes a third metal stub and a third switching unit, the third switching unit being connected between the third metal stub and the metal ground; the fourth choke structure includes a fourth metal stub and a fourth switching unit, the fourth switching unit being connected between the fourth metal stub and the metal ground; wherein, the first The projections of the choke structure and the second choke structure onto the second edge at least partially overlap, and the first choke structure is closer to the first edge than the third choke structure; wherein the on / off states of the first and second switching units are the same, and the on / off states of the third and fourth switching units are the same and opposite to the on / off states of the first and second switching units; wherein when the first and second switching units are on, the first and second choke structures perform a choking function, and when the third and fourth switching units are on, the third and fourth choke structures perform a choking function.

[0022] In one possible implementation, the choke structure is F-shaped and includes a metal branch and two switching units. The metal branch includes two spaced-apart first connection points, which are connected one-to-one with two spaced-apart second connection points on the metal floor through the two switching units. When different switching units are turned on, the different first connection points of the metal branch are connected to the different second connection points on the metal floor, resulting in different connection positions of the choke structure on the corresponding edges, thus satisfying either a first positional relationship or a second positional relationship.

[0023] In one possible implementation, the at least one choke structure includes a fifth choke structure disposed adjacent to the first edge, and the edge length between the connection position of the fifth choke structure on the first edge and the target current point is p1 or m1λ / 4±p1, where m1 is an even number greater than 0, and 0≤p1≤λ / 10.

[0024] In one possible implementation, the terminal device is a foldable device, comprising a first main body, a second main body, and a connecting structure. Both the first main body and the second main body are connected to the connecting structure and can be folded or unfolded via the connecting structure. The second edge is the edge of the first main body opposite to the connecting structure, and the third edge is the edge of the second main body opposite to the connecting structure. The first edge includes a first sub-edge and a second sub-edge. The first sub-edge is located in the first main body and connected to the second edge, and the second sub-edge is located in the second main body and connected to the third edge. The first sub-edge and the second sub-edge are located on the same side of the foldable device. The radiator is disposed in the first main body and adjacent to the first sub-edge, or the radiator is disposed in the second main body and adjacent to the second sub-edge.

[0025] In one possible implementation, the target frequency band is any one or more of 1610–1626.5 MHz, 2483.5–2500 MHz, 1980–2010 MHz, and 2170–2200 MHz.

[0026] In one possible implementation, the antenna unit is a Tiantong satellite antenna and / or a Beidou satellite antenna.

[0027] In one possible implementation, the current intensity on the side of the choke structure connected to the choke structure closer to the radiator is greater than the current intensity on the side of the choke structure farther from the radiator. Attached Figure Description

[0028] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 is a schematic diagram of the structure of a terminal device provided in some embodiments of this application;

[0030] Figure 2 is a schematic diagram of the structure of a terminal device provided in some other embodiments of this application;

[0031] Figure 3 is a first plan view of a terminal device provided in some embodiments of this application;

[0032] Figure 4 is a plan view of a terminal device provided in some other embodiments;

[0033] Figure 5 is a schematic diagram of the current distribution on the edge connected to the choke structure provided in some embodiments of this application.

[0034] Figure 6 is a second plan view of a terminal device provided in some embodiments of this application;

[0035] Figure 7 is a third plan view of a terminal device provided in some embodiments of this application;

[0036] Figure 8 is a fourth plan view of a terminal device provided in some embodiments of this application;

[0037] Figure 9 is a schematic diagram of the structure of a first type of current loop antenna unit provided in some embodiments of this application;

[0038] Figure 10 is a schematic diagram of the structure of a second current loop antenna unit provided in some embodiments of this application;

[0039] Figure 11 is a schematic diagram of the structure of a third type of current loop antenna unit provided in some embodiments of this application;

[0040] Figure 12 is a schematic diagram of the structure of an antenna element provided in some embodiments of this application;

[0041] Figure 13 is a fifth plan view of a terminal device provided in some embodiments of this application;

[0042] Figure 14 is a sixth plan view of a terminal device provided in some embodiments of this application;

[0043] Figure 15 is a seventh plan view of a terminal device provided in some embodiments of this application;

[0044] Figure 16 is an eighth plan view of a terminal device provided in some embodiments of this application;

[0045] Figure 17 is a ninth plan view of a terminal device provided in some embodiments of this application;

[0046] Figure 18 is a tenth planar schematic diagram of a terminal device provided in some embodiments of this application;

[0047] Figure 19 is an eleventh plan view of a terminal device provided in some embodiments of this application;

[0048] Figure 20 is a twelfth plan view of a terminal device provided in some embodiments of this application;

[0049] Figure 21 shows the two-dimensional radiation pattern of the YOZ plane with the choke in Figure 3 set at different positions when the choke is resonant at 2.5 GHz.

[0050] Figure 22 shows the curves of left-handed directivity variation when the choke resonates at 2.5 GHz and the choke is set at different positions.

[0051] Figure 23 shows the 3dB beamwidth variation curves corresponding to the choke slot being set at different positions when the choke slot in Figure 3 is resonant at 2.5GHz.

[0052] Figure 24 shows the 3D radiation pattern of the choke in Figure 3 resonating at 2.5 GHz, with the edge length between the connection position of the choke on the corresponding edge and the target current point being 0.15λ.

[0053] Figure 25 shows the 3D radiation pattern of the choke in Figure 3 resonating at 2.5 GHz, with the edge length between the connection position of the choke on the corresponding edge and the target current point being 0.6λ.

[0054] Figure 26 is a schematic diagram of the current distribution on the metal floor when the edge length between the connection position of the choke groove on the corresponding edge and the target current point is 0.15λ, and the current phase on the radiator is 45° and 135°.

[0055] Figure 27 is a schematic diagram of the current distribution on the metal floor when the edge length between the connection position of the choke groove on the corresponding edge and the target current point is 0.6λ, and the current phase on the radiator is 45° and 135°.

[0056] Figure 28 shows the two-dimensional orientation pattern of the YOZ plane when the metal stub resonates at 2.5 GHz with the metal stub placed at different positions.

[0057] Figure 29 shows the left-handed directional variation curves of the metal stub resonance in Figure 14 at 2.5 GHz, corresponding to the metal stub being placed at different positions.

[0058] Figure 30 shows the 3dB beamwidth variation curves corresponding to the metal stub resonator in Figure 14 at different positions when the metal stub is set at 2.5GHz.

[0059] Figure 31 is a schematic diagram of the current distribution on the metal floor when the edge length between the connection position of the metal branch on the corresponding edge and the target current point is 0.6λ, and the current phase on the radiator is 45° and 135°.

[0060] Figure 32 is a two-dimensional orientation pattern of the XOZ plane when the metal stub in Figure 14 is located in the first position and the metal stub is connected to different matching circuits.

[0061] Figure 33 shows the two-dimensional gain pattern of the metal stub resonance in Figure 14 at 3.6 GHz and the inductance of the matching circuit is 0n.

[0062] Figure 34 is a two-dimensional orientation diagram of the vertical plane when the metal stub in Figure 14 is located in the second position and the metal stub is connected to different matching circuits.

[0063] Figure 35 shows the 3D radiation pattern of the metal stub in Figure 14 at 3.5 GHz resonance, with the connected inductors L = 0.2n and A = 0.74λ.

[0064] Figure 36 is a two-dimensional orientation pattern of the XOZ plane when the metal stub in Figure 14 is located in the third position and the metal stub is connected to different matching circuits.

[0065] Figure 37 is a schematic diagram of the current distribution on the metal floor when the edge length between the connection position of the metal branch in Figure 14 and the target current point is 1.51λ, and the current phase on the radiator is 45° and 135°.

[0066] Figure 38 shows the two-dimensional gain pattern of the metal stub resonance in Figure 14 at 3.6 GHz and the connected inductor is 0n.

[0067] Figure 39 shows a two-dimensional orientation pattern of the XOZ plane when the metal stubs in Figures 8 and 15 are located in the first position and the metal stubs are connected to different matching circuits.

[0068] Figure 40 shows the two-dimensional gain pattern of the metal stub resonance in Figure 15 at 3.6 GHz and the inductance of the matching circuit is 0.35n.

[0069] Figure 41 shows the two-dimensional gain pattern of the metal stub resonance in Figure 8 at 3.6 GHz, with the inductance of the matching circuit being 0.1 n.

[0070] Figure 42 shows the vertical plane orientation patterns of the metal stubs in Figures 8 and 15 when they resonate in different frequency bands.

[0071] Figure 43 is a two-dimensional orientation diagram of the vertical plane when the metal stub in Figure 18 is located in the fourth position and the metal stub is connected to different matching circuits.

[0072] Figure 44 shows the two-dimensional gain pattern of the metal stubs in Figure 18 resonating at 3.6 GHz, with the inductors connected to the two metal stubs being 0.1n and dni, respectively.

[0073] Figure 45 shows the two-dimensional gain pattern of the metal stub in Figure 18 resonating at 3.6 GHz, with the two metal stubs connected to inductors dni and 0.2n respectively.

[0074] Figure 46 is a two-dimensional orientation pattern of the YOZ plane when the metal stub in Figure 17 is located in the fourth position and the metal stub is connected to different matching circuits.

[0075] Figure 47 shows a two-dimensional orientation pattern of the YOZ plane when the metal stub in Figure 7 is located at the fifth position and connected to different matching circuits;

[0076] Figure 48 shows the two-dimensional gain pattern of the metal stub resonance in Figure 7 at 2.2 GHz;

[0077] Figure 49 shows the two-dimensional gain pattern of the metal stub resonance in Figure 7 at 3.4 GHz;

[0078] Figure 50 is a two-dimensional orientation diagram of the vertical plane when the metal stub in Figure 7 is located at the sixth position and connected to different matching circuits;

[0079] Figure 51 shows the two-dimensional gain pattern of the metal stub resonance in Figure 7 at 1.52 GHz;

[0080] Figure 52 shows the two-dimensional gain pattern of the metal stub resonance in Figure 7 at 2.2 GHz. Detailed Implementation

[0081] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0082] In the description of this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal connection of two components; it can be a communication connection; or it can be an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0083] In the description of this application, the terms "first," "second," "third," etc., are used to distinguish different objects, rather than to describe a specific order, and therefore should not be construed as limiting this application.

[0084] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The presentation of this phrase in various locations throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0085] In the description of this application, the terminal device may be, but is not limited to, mobile phones, tablets, laptops, wearable smart devices, in-vehicle devices, smart home devices, and smart city devices. This document uses a mobile phone as an example of a terminal device, where the mobile phone can be a candybar phone or a foldable phone, etc.

[0086] Please refer to Figures 1 and 2. Figure 1 is a schematic diagram of the structure of a terminal device provided in some embodiments of this application; Figure 2 is a schematic diagram of the structure of a terminal device provided in other embodiments of this application.

[0087] As shown in Figure 1, in some embodiments, the terminal device 100 includes a first main body 1, which includes a first display screen 101 and a first back cover 102. The first display screen 101 and the first back cover 102 cooperate to form a first receiving cavity. The first receiving cavity may contain at least one or more of the following: a middle plate, a circuit board assembly, a battery module, a processor, a camera, and a fingerprint module.

[0088] As shown in Figure 2, in some embodiments, the terminal device 100 is a foldable device. The terminal device 100 includes a first main body 1, a second main body 2, and a connecting structure 3. Both the first main body 1 and the second main body 2 are connected to the connecting structure 3 and can be folded or unfolded through the connecting structure 3. The first main body 1 includes a first display screen 101 and a first back cover 102, which cooperate to form a first receiving cavity. The second main body 2 includes a second display screen 201 and a second back cover 202, which cooperate to form a second receiving cavity. At least one or more of the following can be disposed in the first receiving cavity and / or the second receiving cavity: a middle plate, a circuit board assembly, a battery module, a processor, a camera, and a fingerprint module. The connecting structure 3 can be, but is not limited to, a hinge or a rotating shaft.

[0089] Please refer to Figures 3 and 4. Figure 3 is a first plan view of a terminal device provided in some embodiments of this application; Figure 4 is a plan view of a terminal device provided in other embodiments.

[0090] As shown in Figures 3 and 4, in some embodiments, the terminal device 100 includes an antenna element 10, a metal ground plane 20, and at least one choke structure 30. The antenna element 10 includes a radiator 11 that resonates in the target frequency band. The edge 200 of the metal ground plane 20 includes at least a first edge 21, a second edge 22, and a third edge 23. The radiator 11 is disposed adjacent to the first edge 21, and the second edge 22 and the third edge 23 are both connected to the first edge 21 and are angled. When the radiator 11 resonates in the target frequency band, the metal ground plane 20 is coupled to the radiator 11 and excited to generate a current. The at least one choke structure 30 includes a choke structure connected to the first edge 21 and satisfying a first positional relationship with the radiator projection 110 of the radiator 11 on the first edge 21; and / or, includes a choke structure connected to at least one of the second edge 22 and the third edge 23 and satisfying a second positional relationship with the radiator projection 110; the at least one choke structure 30 resonates in the target frequency band. Wherein, the first positional relationship is that the edge length between the connection position of the choke structure on the first edge 21 and the target current point is p or mλ / 4±p, where m is an even number greater than 0, 0≤p≤λ / 10, and λ is the wavelength corresponding to the target frequency band; the second positional relationship is that the edge length between the connection position of the choke structure on the corresponding edge and the target current point is k or nλ / 4±k, where n is a positive integer, 0≤k≤λ / 10; in the non-radiator projection area on the edge 200 of the metal floor 20, the current point closest to the radiator projection 110 is the target current point, and the non-radiator projection area is the area outside the area where the radiator 11 is projected.

[0091] The target frequency band can be, but is not limited to, mid-to-high frequency bands, such as any one or more of the following: 1.518GHz~1.525GHz, 1.668GHz~1.675GHz, 1.98GHz~2.01GHz, 2.17GHz~2.2GHz, 3.4GHz~3.7GHz, 1610~1626.5MHz, 2483.5~2500MHz, 1980~2010MHz, and 2170~2200MHz. It should be noted that the target frequency band is not limited to the frequency bands mentioned in the examples.

[0092] In some embodiments, antenna element 10 is a Tiantong satellite antenna and / or a Beidou satellite antenna. In other embodiments, antenna element 10 may be other antennas, and is not limited to the examples given here.

[0093] In some embodiments, the length of the radiator 11 is 29 to 33 mm. It should be noted that in other embodiments, the length of the radiator 11 can also be other lengths.

[0094] Please refer to Figure 5, which is a schematic diagram of the current distribution on the edge connected to the choke structure provided in some embodiments of this application.

[0095] The choke structure 30 can suppress current. When the choke structure 30 is connected to an edge, the current intensity on the side of the connection point closer to the radiator 11 is greater than the current intensity on the side farther away from the radiator 11. For example, as shown in Figure 5, two choke structures 30 are respectively set at the second edge 22 and the third edge 23. The current intensity on the side of the connection point closer to the radiator 11 is greater than the current intensity on the side farther away from the radiator 11. In Figure 5, the dark gray area represents the area with stronger current intensity, and the light gray area represents the area where current exists, but the current intensity in the light gray area is weaker than that in the dark gray area. The meaning of the colors in other current distribution diagrams in the following text can also be understood with reference to this explanation, and will not be repeated here.

[0096] The radiator 11 is disposed adjacent to the first edge 21, which can be understood as the projection of the radiator 11 onto the first edge 21 being a line segment, and the distance between the radiator 11 and the first edge 21 is less than 10mm.

[0097] The point where the current is weakest refers to the point where the current is reversed, that is, the point where the current is weakest.

[0098] The edge 200 of the metal floor 20 can be understood as an edge with a certain width, such as an edge with a width of 1mm to 5mm.

[0099] The metal floor 20 has multiple surfaces, such as a back surface near the first back cover 102, a front surface near the first display screen 101, and a side surface connecting the front and back surfaces. Since the edge 200 of the metal floor 20 can be understood as an edge with a certain width, the choke structure 30 can be connected to the edge 200 of the metal floor 20 through the following methods: the choke structure 30 can be connected to the side surface of the metal floor 20, the choke structure 30 can be connected to the edge of the front surface of the metal floor 20, or the choke structure 30 can be connected to the edge of the back surface of the metal floor 20.

[0100] Among them, the terminal device 100 can communicate with communication devices such as satellites and routers by resonating in the target frequency band through the radiator 11.

[0101] The radiator 11 can be fed directly, that is, the radiator 11 is connected to the feed source and resonates under the excitation of the feed signal provided by the feed source. Alternatively, it can be fed by coupling, that is, the feed signal can be fed in by coupling with other metal branches, and then resonates under the excitation of the feed signal.

[0102] In this terminal device 100, any one or more of the metal components such as the middle plate, circuit board assembly, and back shell that can be used to reflect antenna signals can serve as the metal ground plane. For ease of illustration and understanding, the metal ground plane 20 is represented by a complete block equivalent structure in this document. It should be noted that in other embodiments, the shape of the metal ground plane 20 can also be other shapes, such as regular shapes or irregular shapes, such as blocks with notches on the edges or blocks with hollowed-out middle parts. In some embodiments, the shape of the metal ground plane 20 is roughly rectangular.

[0103] As shown in Figure 3, in some embodiments, the first edge 21, the second edge 22, and the third edge 23 are all located in the first body 1. The first edge 21 may be the top edge of the metal floor 20, which corresponds to the top edge of the terminal device 100. The second edge 22 and the third edge 23 are the two side edges of the metal floor 20, which also correspond to the side edges of the terminal device 100.

[0104] When the antenna unit 10 is a satellite antenna unit, since satellite signals usually come from the sky, the radiator 11 in the antenna unit 10 is arranged adjacent to the first edge 21, and the first edge 21 is the top edge of the metal floor 20, which can reduce the interference of obstacles, especially when the user raises the mobile phone to make a call or use the satellite function, thus making it more conducive to receiving signals.

[0105] It should be noted that in other embodiments, the first edge 21 may also be the side edge or bottom edge of the metal floor, that is, the radiator 11 may also be set at the side edge or bottom edge adjacent to the metal floor, which is not limited here.

[0106] As shown in Figure 4, in some embodiments, the terminal device 100 is a foldable device, the second edge 22 is the edge in the first main body 1 opposite to the connecting structure 3, the third edge 23 is the edge in the second main body 2 opposite to the connecting structure 3, the first edge 21 includes a first sub-edge 211 and a second sub-edge 212, the first sub-edge 211 is located in the first main body 1 and connected to the second edge 22, the second sub-edge 212 is located in the second main body 2 and connected to the third edge 23, the first sub-edge 211 and the second sub-edge 212 are located on the same side of the foldable device, the radiator 11 is disposed in the first main body 1 and adjacent to the first sub-edge 211, or the radiator 11 is disposed in the second main body 2 and adjacent to the second sub-edge 212.

[0107] Since users typically hold the side of the terminal device 100 when making calls or operating it, when the terminal device 100 is a foldable device, the first edge 21 is the edge that spans the first main body 1 and the second main body 2. The radiator 11 can be disposed adjacent to the first sub-edge 211 of the first edge 21, or adjacent to the second sub-edge 212 of the first edge 21. The second edge 22 and the third edge 23 are the side edges of the terminal device 100, which can prevent the radiator 11 from being blocked from transmitting and receiving signals due to the user's grip, thereby improving the radiation performance of the radiator 11.

[0108] In some embodiments, both the second edge 22 and the third edge 23 are connected to the first edge 21 and are angled, meaning that the second edge 22 and the first edge 21 are not parallel, and the third edge 23 and the first edge 21 are also not parallel. In some embodiments, the second edge 22 and the first edge 21 are perpendicular to each other, and the third edge 23 is also perpendicular to the first edge 21, i.e., the angle is 90°. In other embodiments, the second edge 22 and the first edge 21 may intersect each other but not be perpendicular, and similarly, the third edge 23 may intersect each other but not be perpendicular to the first edge 21. Furthermore, the second edge 22 and the third edge 23 may also be connected with rounded corners, and the third edge 23 and the first edge 21 may also be connected with rounded corners.

[0109] In some embodiments, the second edge 22 and the third edge 23 are parallel, and the edge 200 of the terminal device 100 may also include a fourth edge 24, wherein the second edge 22 and the third edge 23 are both connected to the fourth edge 24, and the fourth edge 24 may be parallel to the first edge 21.

[0110] The radiation pattern of the radiator 11 at resonance is affected by the current on the metal ground 20. Since the current generated by the radiator 11 at resonance to excite the metal ground 20 is mainly distributed along the edge 200 of the metal ground 20, specifically, since the radiator 11 is located near the first edge 23, when the fourth edge 24 is far away from the first edge 23, the radiation pattern of the radiator 11 at resonance is affected by the first current distributed along the first edge 23, the second current distributed along the second edge 22, and the third current distributed along the third edge 23. For example, when the second edge 22 and the third edge 23 are parallel, and the radiator 11 is the radiator of a dipole antenna, the current distributed along the direction of the first edge 23 is the current generated by the excitation of the horizontal dipole, and the current distributed along the second edge 22 and the third edge 23 can be equivalent to the current generated by the excitation of the vertical dipole. Therefore, the radiation pattern of the radiator 11 at this time is equivalent to the superposition of the radiation patterns of the dipoles in two directions. When the phase difference between the maximum current on the first edge 23 and the maximum current on the second edge 22 and the third edge 23 is closer to 0°, the radiation intensity of the superimposed radiation pattern is more uniform in all directions, and thus the omnidirectionality is better. When the phase difference between the maximum current on the first edge 23 and the maximum current on the second edge 22 and the third edge 23 is closer to 90°, the directivity of the superimposed radiation pattern is better. Similarly, when the radiator 11 is the radiator of other antennas, the radiation pattern of the radiator 11 can also be equivalent to the radiation patterns of two antennas with different extension directions. When the phase difference of the maximum current in the two directions is closer to 0°, the omnidirectionality of the radiator 11 is better. When the phase difference of the maximum current in the two directions is closer to 90°, the directivity of the radiator 11 is better.

[0111] Since the choke structure 30 can choke the current, the omnidirectional or directivity of the antenna element 10 can be improved by making the edge length between the connection position of the choke structure 30 on at least one of the second edge 22 and the third edge 23 and the target current point a preset length, so that the phase difference between the maximum current on that edge and the maximum current on the first edge 21 is the target phase difference. When the choke structure is connected to at least one of the second edge 22 and the third edge 23, and the edge length between the connection position of the choke structure on the corresponding edge and the target current point is k or nλ / 4±k, 0≤k≤λ / 10, and n is an even number, the phase difference between the maximum current on the first edge 21 and the maximum current on the corresponding edge can be 54°~90°, thereby improving the directivity of the antenna element 10. When the choke structure is connected to at least one of the second edge 22 and the third edge 23, and the edge length between the connection position of the choke structure on the corresponding edge and the target current point is nλ / 4±k, 0≤k≤λ / 10, where n is an odd number, the phase difference between the maximum current on the first edge 21 and the maximum current on the corresponding edge is 0°~36°, thereby improving the bandwidth of the antenna element 10, i.e., improving the omnidirectionality of the antenna element 10. When the choke structure is connected to the first edge 21, and the edge length between the connection position of the choke structure on the first edge 21 and the target current point is p or mλ / 4±p, where m is an even number greater than 0, 0≤p≤λ / 10, and λ is the wavelength corresponding to the target frequency band, the directivity of the antenna element 10 can also be improved because the current in other regions on the first edge 21 that is opposite to the projection region of the radiator is reduced.

[0112] Please refer to Figures 3, 4 and 6. Figure 6 is a second planar schematic diagram of a terminal device provided in some embodiments of this application.

[0113] As shown in Figure 3, in some embodiments, at least one choke structure 30 is disposed in the metal floor 20, or as shown in Figure 4, it is disposed outside the metal floor 20 and connected to the metal floor 20, or as shown in Figure 6, when there are two or more choke structures 30, at least one of the choke structures 30 is disposed in the metal floor 20, and at least one of the choke structures 30 is disposed outside the metal floor 20 and connected to the metal floor 20.

[0114] Since the choke structure 30 is located in the metal floor 20, or located outside the metal floor 20 and connected to the metal floor 20, when the current in the metal floor 20 is conducted along the corresponding edge and conducted to the choke structure 30, the current will be conducted to the choke structure 30, and then the choke current will continue to be conducted along the corresponding edge.

[0115] It should be noted that, not limited to the example in the figure in this article, at least one choke structure 30 can also be configured in other ways.

[0116] In some embodiments, as shown in FIG3, when the choke structure 30 is disposed in the metal floor 20, the choke structure 30 is a choke groove formed by cutting a groove in the metal floor 20, and part of the choke groove is located on the corresponding edge.

[0117] The choke slot can be equivalent to the capacitor in an LC resonance, and part of the metal ground 20 can be equivalent to the inductor in an LC resonance. Therefore, when the choke structure 30 is a choke slot formed by cutting a groove in the metal ground 20, it can be equivalent to an LC resonance structure together with part of the metal ground 20. Therefore, when the choke structure 30 resonates in the target frequency band, it can form a high impedance to the current generated by the radiator 11 in the target frequency band that excites the metal ground 20, so as to choke the current and thus make the current length on the edge where the choke structure 30 is located in the metal ground 20 within a preset range.

[0118] In some embodiments, as shown in FIG4, when the choke structure 30 is disposed outside the metal floor 20 and connected to the metal floor 20, the choke structure 30 includes metal branches, and the metal branches are connected to the corresponding sides of the metal floor 20.

[0119] The metal stub can be equivalent to the inductor in an LC resonant structure. Since the choke structure 30 is located outside the metal ground 20 and has a gap with the metal ground 20, this gap can be equivalent to the capacitor of the LC resonant structure. Therefore, when the metal stub is located outside the metal ground 20 and connected to the metal ground 20, it can be equivalent to an LC resonant structure. Thus, when the choke structure 30 resonates in the target frequency band, it can form a high impedance to the current generated by the radiator 11 that resonates in the target frequency band and excites the metal ground 20. This allows the current length on the edge of the metal ground 20 connected to the choke structure 30 to be within a preset range.

[0120] Among them, the metal stub can be an active metal stub or a passive metal stub. That is, the metal stub can be connected to the feed source or not. The metal stub connected to the feed source can not only participate in the choke of the metal floor 20, but also act as an antenna to transmit and receive signals.

[0121] In some embodiments, the choke structure 30 further includes a matching circuit, and the metal stub is an active metal stub connected to the matching circuit, so that the choke structure 30 resonates in the target frequency band.

[0122] Since the sum of the electrical length of the metal stub and the electrical length of the matching circuit satisfies the electrical length required for resonance in the target frequency band, the metal stub can resonate in the target frequency band when excited by a signal. Therefore, the metal stub can be connected to the corresponding matching circuit to meet the electrical length requirement for resonance in the target frequency band, without requiring the electrical length of the metal stub to meet the electrical length requirement for resonance in the target frequency band. This allows for a wider range of choices for the physical length of the metal stub.

[0123] In actual terminal equipment 100, the entire device is often surrounded by antennas. Adding extra metal stubs would occupy the antenna layout space. At the same time, metal stubs of fixed length can only operate at one frequency or a narrow frequency band, and cannot cover the transmit and receive frequency bands of different satellite communication systems. Therefore, using some of the metal stubs of the antennas in the terminal equipment 100 as choke structures can not only avoid adding extra structures, but also meet the coverage requirements of multiple frequency bands.

[0124] The matching circuit may include electronic components such as capacitors and inductors.

[0125] Please refer to Figures 3, 4 and 7. Figure 7 is a third planar schematic diagram of a terminal device provided in some embodiments of this application.

[0126] In some embodiments, as shown in Figures 3, 4, and 7, the shape of the choke structure 30 includes at least one of an "L" shape, a "T" shape, and an "F" shape. In other embodiments, the shape of the choke structure 30 may also be other shapes.

[0127] Since the choke structure 30 has any of the shapes of "L", "T" and "F", it includes a part parallel to the corresponding edge and a part connected to the edge, thus facilitating the formation of a parallel LC resonant structure to choke the current on the corresponding edge.

[0128] Please refer to Figure 8, which is a fourth planar schematic diagram of a terminal device provided in some embodiments of this application.

[0129] In some embodiments, as shown in FIG8, the choke structure 30 is connected to at least one of the second edge 22 and the third edge 23. The edge length between the connection position of the choke structure 30 on the corresponding edge and the target current point is nλ / 4±k, where n is a positive odd number, 0≤k≤λ / 10. The shape of the choke structure 30 is "L". The choke structure 30 includes a first part 301 parallel to the corresponding edge and a second part 302 perpendicular to the corresponding edge. The first part 301 and the second part 302 are connected to form an "L" shape. The first part 301 includes a first end 301a and a second end 301b. The second part 302 includes a third end 302a and a fourth end 302b. The first end 301a of the first part 301 is connected to the third end 302a of the second part 302. The fourth end 302b of the second part 302 is connected to the corresponding edge. The first end 301a is closer to the radiator 11 than the second end 301b.

[0130] Since the choke structure 30 is connected to at least one of the second edge 22 and the third edge 23, the edge length between the connection position of the choke structure 30 on the corresponding edge and the target current point is nλ / 4±k, where n is a positive odd number, 0≤k≤λ / 10. This can improve the beamwidth of the radiation pattern of the antenna element 10. At the same time, since there is also current in the choke structure 30 when it resonates, for the "L"-shaped choke structure 30, when the choke structure 30 resonates, the current in the choke structure 30 is opposite to the current in the corresponding region of the metal ground 20 (the region on which the choke structure 30 is projected). When the edge length between the small current points is close to 0 (e.g., 0 to λ / 10), if the second end 301b of the first part 301 is closer to the radiator 11 than the first end 301a, the current on the first part 301 will cancel out the current on the metal floor 20 that contributes to improving omnidirectionality. This could easily cause the radiation pattern of the radiator 11 to have a zero point, thus allowing the omnidirectionality of the radiator 11 to have room for improvement. However, if the first end 301a is closer to the radiator 11 than the second end 301b, the current on the first part 301 will not affect the current on the metal floor 20 that contributes to improving omnidirectionality. Therefore, the omnidirectionality improvement effect of the radiator 11 can be better.

[0131] In some embodiments, the length of the first portion 301 of the "L"-shaped choke structure 30 can be 7.0 mm to 7.5 mm. In other embodiments, the length of the first portion 301 of the "L"-shaped choke structure 30 can also be other lengths, not limited to the examples herein.

[0132] The antenna element 10 can be a current loop antenna element. When radiating, the current loop antenna element generates a current in the same direction on the radiator 11, and the direction of the current on the radiator 11 is opposite to the direction of the current at the projection position of the radiator 11 on the first edge 21 of the metal ground plane 20; thus forming a current loop composed of the radiator 11 and the metal ground plane 20. This current loop generates a magnetic field perpendicular to the plane of the paper and outwards between the radiator 11 and the metal ground plane 20. By connecting a capacitor in parallel to ground at the end of the radiator 11, a uniform magnetic field distribution is formed, thereby achieving radiation with the characteristics of a current loop antenna. Radio frequency energy is coupled to the metal ground plane 20 of the terminal device 100 through the magnetic field. In some embodiments, the above-mentioned current loop radiation characteristics can be obtained by setting series and / or parallel capacitors on the radiator 11. It should be understood that, through the energy storage characteristics of a capacitor, the change in current on the radiator 11 can be made smoother. Since the magnetic field corresponds to the current, the change in the magnetic field in the region near the radiator 11 (such as the region between the radiator 11 and the metal floor 20) can also be made smoother, thereby obtaining a more uniformly distributed magnetic field. In other embodiments, the antenna element 10 can also be an antenna element with other structures.

[0133] Please refer to Figures 9-11. Figure 9 is a schematic diagram of the structure of a first type of current loop antenna unit provided in some embodiments of this application; Figure 10 is a schematic diagram of the structure of a second type of current loop antenna unit provided in some embodiments of this application; and Figure 11 is a schematic diagram of the structure of a third type of current loop antenna unit provided in some embodiments of this application.

[0134] In some embodiments, as shown in FIG9, the current loop antenna element may include a first radiator 111, and when the current loop antenna is operating in the fundamental mode, the electrical length of the first radiator 111 may correspond to the antenna resonant frequency.

[0135] In some embodiments, as shown in FIG10, the current loop antenna element may include a second radiator 112 and a third radiator 113. The second radiator 112 and the third radiator 113 can be connected via a feed point. The end of the second radiator 112 furthest from the third radiator 113 can be grounded via a second capacitor C2, and the end of the third radiator 113 furthest from the second radiator 112 can be grounded via a third capacitor C3. When the current loop antenna operates in fundamental mode (e.g., 1 / 4 wavelength mode), the lengths of the second radiator 112 and the third radiator 113 can each correspond to 1 / 4 of the operating wavelength; that is, the lengths of the second radiator 112 and the third radiator 113 of the current loop antenna correspond to 1 / 2 of the operating wavelength. For example, the length of the second radiator 112 can be less than 1 / 4 of the operating wavelength. Similarly, the length of the third radiator 113 can be less than 1 / 4 of the operating wavelength. In other words, the length of the second radiator 112 furthest from the third radiator 113 of the current loop antenna can be less than 1 / 2 of the operating wavelength. In some embodiments, the sum of the lengths of the second radiator 112 away from the third radiator 113 can be greater than 1 / 4 of the operating wavelength and less than 1 / 2 of the operating wavelength.

[0136] In some embodiments, as shown in FIG11, the current loop antenna element may include a fourth radiator 114 and a fifth radiator 115. The fourth radiator 114 and the fifth radiator 115 are connected through a feed point. The end of the fourth radiator 114 away from the fifth radiator 115, and the end of the fifth radiator 115 away from the fourth radiator 114, can be grounded respectively. Thus, the fourth radiator 114, the fifth radiator 115, and ground can form a gap for radiation. In this example, a fourth capacitor C4 may be connected in series with the fourth radiator 114, and a fifth capacitor C5 may be connected in series with the fifth radiator 115.

[0137] In some embodiments, the resonant mode corresponding to the radiator 11 is a 1 / 2 wavelength mode, and there are two target current points, located on both sides of the radiator projection 110. The edge length between any target current point and the midpoint of the radiator projection 110 is λ / 4. The antenna element 10 can be the current loop antenna element shown in Figure 9, or the current loop antenna element shown in Figure 10, etc. When the radiator 11 is the radiator shown in Figure 9, the position of the radiator projection 110 in the first edge 21 and the part of the edge region adjacent to the position of the radiator projection 110 constitute a region with a length of 1 / 2 wavelength, and the current is in the same direction in this region.

[0138] Therefore, the radiator 11 can be smaller in size, making it easier to install in terminal devices with limited space. Moreover, the proportion of the same-direction current in the region near the radiator 11 in the first edge 21 is relatively large, resulting in higher gain and more effective concentration of radiated energy.

[0139] In some embodiments, the edge length between the midpoint of the radiator projection 110 and the target current point is approximately 32 mm, and the edge length between the target current point and the connection position of the choke structure 30 on the second edge 22 is approximately 3 mm. It should be noted that in other embodiments, the edge lengths between the midpoint of the radiator projection 110 and the target current point, and the edge lengths between the target current point and the connection position of the choke structure 30 on the second edge 22, can also be other values, and are not limited to the examples given herein.

[0140] When the radiator 11 includes at least two radiators spaced apart, the midpoint of the radiator projection 110 may be located on the projection of one of the radiators or in the interval between the projections of the two radiators.

[0141] Please refer to Figure 12, which is a schematic diagram of the structure of an antenna unit provided in some embodiments of this application.

[0142] In some embodiments, the resonant mode corresponding to the radiator 11 is a 1 / 4 wavelength mode, and there are two target current points, located on both sides of the radiator projection 110. The edge length between the target current points and the projection position of the grounding point of the radiator 11 on the first edge is λ / 2. The antenna element 10 can be the antenna element shown in Figure 12, where the radiator 11 in Figure 12 is connected to a feed source at one end and grounded in the middle.

[0143] Therefore, the proportion of the same-direction current in the region near the radiator 11 in the first edge 21 is relatively small, which is more conducive to improving the omnidirectionality of the radiator 11.

[0144] Please refer to Figure 13, which is a fifth planar schematic diagram of a terminal device provided in some embodiments of this application.

[0145] In some embodiments, as shown in FIG13, at least one choke structure 30 includes a first choke structure 31, which is connected to either a second edge 22 or a third edge 23. The edge length between the connection position of the first choke structure 31 on the corresponding edge and the target current point is k1 or n1λ / 4±k1, where n1 is a positive integer and 0≤k1≤λ / 10.

[0146] The first choke structure 31 can choke the current on the edge it is connected to. Therefore, when the edge length between the connection position of the first choke structure 31 on the corresponding edge and the target current point is k1 or n1λ / 4±k1, and n1 is even, the phase difference between the maximum current on the first edge 21 and the maximum current on the corresponding edge is 54°~90°, thereby improving the directivity of the antenna element 10. When the edge length between the connection position of the first choke structure 31 on the corresponding edge and the target current point is n1λ / 4±k1, and n1 is odd, the phase difference between the maximum current on the first edge 21 and the maximum current on the corresponding edge is 0°~36°, thereby improving the bandwidth of the antenna element 10, i.e., improving the omnidirectionality of the antenna element 10.

[0147] Please refer to Figures 3, 4, 14 and 15. Figure 14 is a sixth planar schematic diagram of a terminal device provided in some embodiments of this application; Figure 15 is a seventh planar schematic diagram of a terminal device provided in some embodiments of this application.

[0148] In some embodiments, as shown in Figures 3 and 4, Figure 14 and Figure 15, similar to the embodiment corresponding to Figure 13, but with the difference that at least one choke structure 30 further includes a second choke structure 32. The first choke structure 31 is connected to either the second edge 22 or the third edge 23, and the second choke structure 32 is connected to either the second edge 22 or the third edge 23. The edge length between the connection position of the second choke structure 32 on the corresponding edge and the target current point is k2 or n2λ / 4±k2, where n2 is a positive integer, 0≤k1≤λ / 10, 0≤k2≤λ / 10.

[0149] The first choke structure 31 and the second choke structure 32 can both be disposed on the second edge 22, or both can be disposed on the third edge 23, or one can be disposed on the second edge 22 and the other on the third edge 23.

[0150] In some embodiments, both n1 and n2 are odd numbers, so that the first choke structure 31 and the second choke structure 32 are used simultaneously to improve the bandwidth of the antenna element 10. Alternatively, both n1 and n2 are even numbers, and the first choke structure 31 and the second choke structure 32 are used simultaneously to improve the directivity of the antenna element 10.

[0151] In some embodiments, one of n1 and n2 is an odd number and the other is an even number. Both the first choke structure 31 and the second choke structure 32 include metal stubs, and the two metal stubs are connected to the corresponding edges through different switching units. Thus, the connection between the metal stubs and the edges can be controlled by switching the switching units on and off. Therefore, the bandwidth of the antenna element 10 can be selectively increased by one of the first choke structure 31 and the second choke structure 32, and the directivity of the antenna element 10 can be increased by the other of the first choke structure 31 and the second choke structure 32.

[0152] In some embodiments, the edge length between the connection position of the first choke structure 31 on the corresponding edge and the target current point is k1, and the edge length between the connection position of the second choke structure 32 on the corresponding edge and the current point closest to the radiator projection 110 is k2. Furthermore, the projections of the first choke structure 31 and the second choke structure 32 on the second edge 22 at least partially overlap, thereby improving the directivity of the antenna element 10. Here, k1 is approximately λ / 10, and k2 is approximately λ / 10. k1 and k2 can be the same or different.

[0153] In some embodiments, the first choke structure 31 is connected to the second edge 22, the second choke structure 32 is connected to the third edge 23, n1 = n2, and the projections of the first choke structure 31 and the second choke structure 32 on the second edge 22 at least partially overlap.

[0154] The projections of the first choke structure 31 and the second choke structure 32 on the second edge 22 at least partially overlap, which makes the current on the second edge 22 and the third edge 23 more symmetrical, thus making the influence on the radiation pattern of the antenna element 10 more symmetrical, and avoiding the radiation direction of the antenna element 10 from deviating significantly from the original desired radiation direction.

[0155] The first choke structure 31 is connected to the first matching circuit, thereby causing the first choke structure 31 to resonate in the target frequency band; the second choke structure 32 is connected to the second matching circuit, thereby causing the second choke structure 32 to resonate in the target frequency band.

[0156] Please refer to Figure 16, which is an eighth planar schematic diagram of a terminal device provided in some embodiments of this application.

[0157] In some embodiments, as shown in FIG14, at least one choke structure 30 further includes a third choke structure 33, which is connected to either the second edge 22 or the third edge 23, and the edge length between the connection position of the third choke structure 33 on the corresponding edge and the target current point is k3 or n3λ / 4±k3, where n3 is a positive integer and 0≤k3≤λ / 10.

[0158] The first choke structure 31, the second choke structure 32 and the third choke structure 33 can all be disposed on the second edge 22, or all of them can be disposed on the third edge 23, or one of them can be disposed on the second edge 22 and the other two can be disposed on the third edge 23, or one of them can be disposed on the third edge 23 and the other two can be disposed on the second edge 22.

[0159] In some embodiments, n1, n2, and n3 can all be odd numbers, so that the first choke structure 31, the second choke structure 32, and the third choke structure 33 are simultaneously used to improve the bandwidth of the antenna element 10. Alternatively, n1, n2, and n3 can all be even numbers, and the first choke structure 31, the second choke structure 32, and the third choke structure 33 are simultaneously used to improve the directivity of the antenna element 10. Alternatively, at least one of n1, n2, and n3 can be odd, and at least one can be even, and the first choke structure 31, the second choke structure 32, and the third choke structure 33 are all connected to the corresponding edge through different switching units. The first choke structure 31, the second choke structure 32, and the third choke structure 33 all include metal stubs, so that the connection between the metal stubs and the edge can be controlled by switching the switching units on and off.

[0160] Please refer to Figure 17, which is a ninth planar schematic diagram of a terminal device provided in some embodiments of this application; Figure 18 is a tenth planar schematic diagram of a terminal device provided in some embodiments of this application.

[0161] In some embodiments, as shown in Figures 17 and 18, at least one choke structure 30 further includes a fourth choke structure 34. The third choke structure 33 is connected to the second edge 22, and the fourth choke structure 34 is connected to the third edge 23. The edge length between the connection position of the fourth choke structure 34 on the corresponding edge and the target current point is k4 or n4λ / 4±k4. The projections of the third choke structure 33 and the fourth choke structure 34 on the second edge 22 at least partially overlap, where n3=n4 and 0≤k4≤λ / 10.

[0162] Since the edge length between the connection position of the third choke structure 33 on the corresponding edge and the target current point is k3 or n3λ / 4±k3, and the edge length between the connection position of the fourth choke structure 34 on the corresponding edge and the target current point is k4 or n4λ / 4±k4, and the projections of the third choke structure 33 and the fourth choke structure 34 on the second edge 22 at least partially overlap, n3=n4, 0≤k3≤λ / 10, 0≤k4≤λ / 10, therefore, when n When n3 and n4 are both odd numbers, the maximum current on the second edge 22 and the third edge 23 has a phase difference of 0° to 36° with the maximum current on the first edge 21, which can improve the bandwidth of the antenna element 10, that is, improve the omnidirectionality of the antenna element 10. When n3 and n4 are both even numbers, the maximum current on the second edge 22 and the third edge 23 has a phase difference of 54° to 90° with the maximum current on the first edge 21, which can improve the directivity of the antenna element 10.

[0163] In some embodiments, the first choke structure 31 is connected to the second edge 22, the second choke structure 32 is connected to the third edge 23, n1 = n2, and the projections of the first choke structure 31 and the second choke structure 32 on the second edge 22 at least partially overlap; the third choke structure 33 is connected to the second edge 22, the fourth choke structure 34 is connected to the third edge 23, and the projections of the third choke structure 33 and the fourth choke structure 34 on the second edge 22 at least partially overlap, n3 = n4. Wherein, when the edge length between the connection position of the first choke structure 31 on the second edge 22 and the target current point is k1, and the edge length between the connection position of the second choke structure 32 on the corresponding edge and the target current point is k2, the edge length between the connection position of the third choke structure 33 on the corresponding edge and the target current point is n3λ / 4±k3, and the edge length between the connection position of the fourth choke structure 34 on the corresponding edge and the target current point is n4λ / 4±k4, n3=n4=1. When the edge length between the connection position of the first choke structure 31 on the second edge 22 and the target current point is n1λ / 4±k1, the edge length between the connection position of the second choke structure 32 on the corresponding edge and the target current point is n2λ / 4±k2, the edge length between the connection position of the third choke structure 33 on the corresponding edge and the target current point is n3λ / 4±k3, and the edge length between the connection position of the fourth choke structure 34 on the corresponding edge and the target current point is n4λ / 4±k4, n1=n2=n3-1=n4-1, for example, n1=n2=1, n3=n4=2.

[0164] In some embodiments, as shown in FIG18, the first choke structure 31 includes a first metal branch 311 and a first switching unit 312, the first switching unit 312 being connected between the first metal branch 311 and the metal floor 20; the second choke structure 32 includes a second metal branch 321 and a second switching unit 322, the second switching unit 322 being connected between the second metal branch 321 and the metal floor 20; the third choke structure 33 includes a third metal branch 331 and a third switching unit 332, the third switching unit 332 being connected between the third metal branch 331 and the metal floor 20; the fourth choke structure 34 includes a fourth metal branch 341 and a fourth switching unit 342, the fourth switching unit 342 being connected between the fourth metal branch 341 and the metal floor 20. Wherein, the projections of the first choke structure 31 and the second choke structure 32 on the second edge 22 at least partially overlap, and the first choke structure 31 is closer to the first edge 21 than the third choke structure 33; wherein, the on / off states of the first switch unit 312 and the second switch unit 322 are the same, and the on / off states of the third switch unit 332 and the fourth switch unit 342 are the same and opposite to the on / off states of the first switch unit 312 and the second switch unit 322; wherein, when the first switch unit 312 and the second switch unit 322 are on, the first choke structure 31 and the second choke structure 32 perform choking function, and when the third switch unit 332 and the fourth switch unit 342 are on, the third choke structure 33 and the fourth choke structure 34 perform choking function.

[0165] Wherein, when the edge length between the connection position of the first choke structure 31 on the second edge 22 and the target current point is k1 or n1λ / 4±k1, the edge length between the connection position of the second choke structure 32 on the corresponding edge and the target current point is k2 or n2λ / 4±k2, n1=n2 and is an even number, the edge length between the connection position of the third choke structure 33 on the corresponding edge and the target current point is n3λ / 4±k3, and the edge length between the connection position of the fourth choke structure 34 on the corresponding edge and the target current point is n4λ / 4±k4, n 3 = n4 and is an odd number. When the first switch unit 312 and the second switch unit 322 are turned on, the first choke structure 31 and the second choke structure 32 achieve choke function to improve the directivity of the antenna unit 10. When the third switch unit 332 and the fourth switch unit 342 are turned on, the third choke structure 33 and the fourth choke structure 34 achieve choke function to improve the omnidirectionality of the antenna unit 10. Thus, the terminal device 100 can achieve better communication results when communicating with different types of satellites (such as geostationary satellites like Tiantong satellite and low-orbit satellites like Xingwang).

[0166] In some embodiments, as shown in FIG17, the first choke structure 31, the second choke structure 32, the third choke structure 33, and the fourth choke structure 34 are all "L"-shaped, and the first end 301a of the first portion 301 of the first choke structure 31 and the second choke structure 32 is closer to the first edge 21 than the second end 301b, and the first end 301a of the first portion 301 of the third choke structure 33 and the fourth choke structure 34 is farther away from the first edge 21 than the second end 301b.

[0167] Compared to the first choke structure 31 and the third choke structure 33 on the second edge 22, where the first end 301a of the first portion 301 is closer to the first edge 21 than the second end 301b, by making the first end 301a of the first portion 301 of the first choke structure 31 closer to the first edge 21 than the second end 301b, and the first end 301a of the first portion 301 of the third choke structure 33 farther away from the first edge 21 than the second end 301b, the coupling between the first choke structure 31 and the third choke structure 33 can be made stronger. Therefore, when the first end 301a of the first choke structure 31 and the first end 301a of the third choke structure 33 are closer to the first edge 21 than the second end 301b, the coupling between them can be stronger. When the distance between the ends 301a is relatively close (e.g., a spacing of λ / 4), and the first end 301a of the first choke structure 31 is connected to the matching circuit, and the first end 301a of the third choke structure 33 is grounded, the two choke structures can be equivalent to one choke structure. Therefore, when the first choke structure 31 is used to improve the directivity of the antenna element 10, the choke structures equivalent to the first choke structure 31 and the third choke structure 33 are both used to improve the directivity of the antenna element 10; when the first choke structure 31 is used to improve the omnidirectionality of the antenna element 10, the choke structures equivalent to the first choke structure 31 and the third choke structure 33 are both used to improve the omnidirectionality of the antenna element 10. Similarly, compared to the second choke structure 32 and the fourth choke structure 34 on the third edge 23, the first end 301a of the first portion 301 of the second choke structure 32 is closer to the first edge 21 than the second end 301b. By making the first end 301a of the first portion 301 of the second choke structure 32 on the third edge 23 closer to the first edge 21 than the second end 301b, and the first end 301a of the first portion 301 of the fourth choke structure 34 farther away from the first edge 21 than the second end 301b, the coupling between the second choke structure 32 and the fourth choke structure 34 can be made stronger. Therefore, when the first end 301a of the second choke structure 32 and the fourth choke structure 34 are closer to the first edge 21 than the second end 301b, the coupling between them can be stronger. The distance between the first ends 301a is relatively close (e.g., a spacing of λ / 4), and the first end 301a of the second choke structure 32 is connected to the matching circuit. When the first end 301a of the fourth choke structure 34 is grounded, the two choke structures can be equivalent to one choke structure. Therefore, when the second choke structure 32 is used to improve the directivity of the antenna element 10, the choke structures equivalent to the second choke structure 32 and the fourth choke structure 34 are both used to improve the directivity of the antenna element 10. When the second choke structure 32 is used to improve the omnidirectionality of the antenna element 10, the choke structures equivalent to the second choke structure 32 and the fourth choke structure 34 are both used to improve the omnidirectionality of the antenna element 10.

[0168] Please refer to Figure 19, which is an eleventh planar schematic diagram of a terminal device provided in some embodiments of this application.

[0169] In some embodiments, as shown in FIG19, the choke structure 30 is F-shaped. The choke structure 30 includes a metal branch 40 and two switching units (41, 42). The metal branch 40 includes two first connection points (401, 402) spaced apart. The two first connection points (401, 402) are connected one-to-one with two second connection points (20a, 20b) spaced apart on the metal floor 20 through the two switching units (41, 42). When different switching units are turned on, different first connection points of the metal branch 40 are connected to different second connection points of the metal floor, so that the connection positions of the choke structure 30 on the corresponding edges are different, thus satisfying the first position relationship or the second position relationship.

[0170] Therefore, by turning on different switching units, the choke structure 30 can choke the edge connected to it at different positions, and the terminal device 100 has good communication performance when communicating with different types of satellites (such as geostationary satellites such as Tiantong satellite and low-orbit satellites such as Xingwang).

[0171] Please refer to Figure 20, which is a twelfth planar schematic diagram of a terminal device provided in some embodiments of this application.

[0172] In some embodiments, as shown in FIG20, at least one choke structure 30 includes a fifth choke structure 35, the fifth choke structure 35 being disposed adjacent to the first edge 21, and the edge length between the connection position of the fifth choke structure 35 on the first edge 21 and the target current point is p1 or m1λ / 4±p1, where m1 is an even number greater than 0, and 0≤p1≤λ / 10.

[0173] The fifth choke structure 35 is disposed adjacent to the first edge 21, and the edge length between the connection position of the fifth choke structure 35 on the first edge 21 and the target current point is p1 or m1λ / 4±p1, where m1 is an even number greater than 0, 0≤p1≤λ / 10. This reduces the current in other regions on the first edge 21 that is opposite to the projection region of the radiator, thereby improving the directivity of the antenna element 10.

[0174] Please refer to Figures 21-27. Figure 21 shows the two-dimensional radiation pattern of the YOZ plane when the choke in Figure 3 is resonant at 2.5 GHz, with the choke positioned at different locations. Figure 22 shows the left-handed directivity variation curves corresponding to the choke in Figure 3 being resonant at 2.5 GHz, with the choke positioned at different locations. Figure 23 shows the 3dB beamwidth variation curves corresponding to the choke in Figure 3 being resonant at 2.5 GHz, with the choke positioned at different locations. Figure 24 shows the 3D radiation pattern of the choke in Figure 3 being resonant at 2.5 GHz, with the edge length between the connection position of the choke on the corresponding edge and the target current point being 0.15λ. Radiation patterns; Figure 25 shows the 3D radiation pattern of the choke in Figure 3 resonating at 2.5 GHz, with the edge length between the connection position of the choke on the corresponding edge and the target current point being 0.6λ; Figure 26 shows the current distribution on the metal floor when the edge length between the connection position of the choke on the corresponding edge and the target current point is 0.15λ, and the current phase on the radiator is 45° and 135°; Figure 27 shows the current distribution on the metal floor when the edge length between the connection position of the choke on the corresponding edge and the target current point is 0.6λ, and the current phase on the radiator is 45° and 135°.

[0175] In this paper, A refers to the edge length between the connection position of the choke structure on the corresponding edge and the target current point. Figure 21 shows that when the edge length between the connection position of the choke slot on the corresponding edge and the target current point is different, the antenna element exhibits a periodic change in beam widening and gain improvement. Specifically, A = 0.15λ corresponds to a 15mm interval between the connection position of the choke slot and the corresponding edge and the first edge 21; A = 0.45λ corresponds to a 30mm interval; A = 0.6λ corresponds to a 40mm interval; and A = 0.75λ corresponds to a 15mm interval between the connection position of the choke slot and the first edge 21. 50mm, A=0.9λ corresponds to the connection position of the choke groove and the corresponding edge, and the interval between the first edge 21 is 60mm; A=λ corresponds to the connection position of the choke groove and the corresponding edge, and the interval between the first edge 21 is 70mm; A=1.2λ corresponds to the connection position of the choke groove and the corresponding edge, and the interval between the first edge 21 is 80mm; A=1.35λ corresponds to the connection position of the choke groove and the corresponding edge, and the interval between the first edge 21 is 90mm; A=1.5λ corresponds to the connection position of the choke groove and the corresponding edge, and the interval between the first edge 21 is 100mm; A=1.65λ corresponds to the interval between the choke groove and the first edge 21 is 110mm.

[0176] The 3dB beamwidth refers to the angle between two directions where the radiated power decreases by 3dB on either side of the direction of maximum radiation.

[0177] As can be seen from Figures 26 and 27, there is basically no current in the lower half of the metal floor 20, indicating that the choke groove has a choking effect. The loading of the choke groove is equivalent to cutting off the metal floor 20.

[0178] As can be seen from Figures 24 and 26, the currents at the second edge 22 and the third edge 23 are suppressed, and the radiation pattern is mainly generated by the current at the first edge 21. The metal ground plane 20 plays a reflective role to improve the antenna directivity.

[0179] As can be seen from Figures 25 and 27, the current on the second edge 22 and the third edge 23 is in 1 / 4 wavelength mode. The presence of current on the second edge 22 and the third edge 23 widens the beamwidth.

[0180] Please refer to Figures 28-31. Figure 28 shows the two-dimensional radiation pattern of the YOZ plane of the metal stub in Figure 14 at 2.5 GHz with the metal stub placed at different positions. Figure 29 shows the left-hand directional variation curve of the metal stub in Figure 14 at 2.5 GHz with the metal stub placed at different positions. Figure 30 shows the 3dB beamwidth variation curve of the metal stub in Figure 14 at 2.5 GHz with the metal stub placed at different positions. Figure 31 shows the current distribution on the metal floor when the edge length between the connection position of the metal stub on the corresponding edge and the target current point is 0.6λ, and the current phase on the radiator is 45° and 135°.

[0181] As can be seen from Figure 28, when the connection position of the metal stub on the corresponding edge is different from the edge length between the target current point and the edge length, the antenna element exhibits a periodic change in beam widening and gain improvement.

[0182] As can be seen from Figure 31, the current at the second edge 22 and the third edge 23 is choked, indicating that the metal stub has a choking effect.

[0183] Please refer to Figures 32 and 33. Figure 32 is a two-dimensional radiation pattern of the XOZ plane when the metal stub in Figure 14 is located in the first position and the metal stub is connected to different matching circuits; Figure 33 is a two-dimensional gain radiation pattern of the metal stub in Figure 14 when it resonates at 3.6 GHz and the inductance of the matching circuit is 0n.

[0184] In Figure 32(a), A = 0.36λ, in Figure 32(b), A = 0.37λ, and in Figure 32(b), A = 0.38λ all correspond to a 10mm interval between the metal stub and the first edge. Figure 32(a) is the two-dimensional radiation pattern of the metal stub resonating in the XOZ plane at 3.4GHz; Figure 32(b) is the two-dimensional radiation pattern of the metal stub resonating in the XOZ plane at 3.5GHz; Figure 32(c) is the two-dimensional radiation pattern of the metal stub resonating in the XOZ plane at 3.6GHz; and Figure 33 is the two-dimensional gain radiation pattern of the metal stub resonating at 3.6GHz in Figure 14.

[0185] As can be seen from Figure 32(a), adjusting the inductance L value of the matching circuit connected to the metal stub results in different radiation patterns at the same frequency. Combining Figures 32(a), 32(b), and 32(c), it can be seen that at different frequencies, the antenna beamwidth or directivity can be made closer by adjusting the inductance L value of the matching circuit connected to the metal stub. For example, at 3.4 GHz, the 3dB beamwidth can reach 160° when L = 0.2n, while at 3.5 GHz and 3.6 GHz, the 3dB beamwidth can reach 162° when L = 0.1n.

[0186] As shown in Figure 33, when the metal stub resonates at 3.6 GHz and the inductance of the connected matching circuit is L = 0n (i.e., directly grounded), the antenna directivity is greater than 3 dBi within θ ≤ 93°, exhibiting a wide beamwidth that can well meet the requirements of the StarNet satellite system.

[0187] Please refer to Figures 34 and 35. Figure 34 is a two-dimensional radiation pattern of the vertical plane when the metal stub in Figure 14 is located in the second position and the metal stub is connected to different matching circuits; Figure 35 is a 3D radiation pattern of the metal stub in Figure 14 at 3.5GHz resonance with connected inductors L = 0.2n and A = 0.74λ.

[0188] When A = 0.71λ, 0.74λ, and 0.75λ, the antenna directivity can be improved. Moreover, when A = 0.71λ, 0.74λ, and 0.75λ, the distance between the connection position of the metal stub on the corresponding edge and the first edge is 20mm. As can be seen from Figure 34, the inductance value has little effect on the beamwidth.

[0189] Please refer to Figures 36-38. Figure 36 is a two-dimensional radiation pattern of the XOZ plane when the metal stub in Figure 14 is located in the third position and the metal stub is connected to different matching circuits; Figure 37 is a schematic diagram of the current distribution on the metal floor when the edge length between the connection position of the metal stub in Figure 14 on the corresponding edge and the target current point is 1.51λ, and the current phase on the radiator is 45° and 135°; Figure 38 is a two-dimensional gain radiation pattern when the metal stub in Figure 14 resonates at 3.6GHz and the connected inductor is 0n.

[0190] Where A = 1.43λ, 1.47λ, and 1.51λ all correspond to the distance of the connection position of the metal branch on the corresponding edge and the first edge being 40mm.

[0191] As shown in Figure 36, the 3dB beamwidth of the metal stub at 3.4 GHz resonance can reach 116°, the 3dB beamwidth of the metal stub at 3.5 GHz resonance can reach 124°, and the 3dB beamwidth of the metal stub at 3.6 GHz resonance can reach 130°.

[0192] As can be seen from Figure 37, when the distance between the connection position of the metal stub on the corresponding edge and the first edge is 40mm, the current on the second and third edges will have a zero standing wave because the metal stub is far from the first edge. This results in the radiation pattern having a zero point at θ = 90°, which narrows the beamwidth.

[0193] As shown in Figure 38, when the metal stub resonates at 3.6 GHz and the metal stub is directly grounded, the antenna directivity is greater than 3 dBi within θ ≤ 85°.

[0194] Please refer to Figures 39-42. Figure 39 shows the two-dimensional XOZ plane radiation pattern when the metal stubs in Figures 8 and 15 are located in the first position and connected to different matching circuits; Figure 40 shows the two-dimensional gain radiation pattern when the metal stub in Figure 15 resonates at 3.6 GHz and the inductance of the matching circuit is 0.35n; Figure 41 shows the two-dimensional gain radiation pattern when the metal stub in Figure 8 resonates at 3.6 GHz and the inductance of the matching circuit is 0.1n; Figure 42 shows the vertical plane radiation pattern when the metal stubs in Figures 8 and 15 resonate in different frequency bands.

[0195] Among them, Figure 39(a) is a two-dimensional radiation pattern of the XOZ plane when the metal stub in Figure 15 is located in the first position and the metal stub is connected to different matching circuits; Figure 39(b) is a two-dimensional radiation pattern of the XOZ plane when the metal stub in Figure 8 is located in the first position and the metal stub is connected to different matching circuits; it can be seen from Figure 39(a) and Figure 39(b) that the beam broadening effect can be achieved regardless of whether the metal stub opening is facing upward or downward.

[0196] As can be seen from Figures 40 and 41, the wide beam pattern formed by the metal stub with its opening facing downwards has fewer null points than the wide beam pattern formed by the metal stub with its opening facing upwards. Moreover, as shown in Figure 41, within θ≤93°, the antenna directivity is greater than 3dBi, exhibiting a wider beamwidth, which is the same as the effect produced by the "T" choke structure.

[0197] As can be seen from Figure 42, within the 1.48-3.7 GHz frequency band, the metal stubs can effectively widen the beamwidth of the antenna.

[0198] Please refer to Figures 43-45. Figure 43 is the two-dimensional gain pattern in the vertical plane when the metal stub in Figure 18 is located in the fourth position and the metal stub is connected to different matching circuits; Figure 44 is the two-dimensional gain pattern when the metal stub in Figure 18 resonates at 3.6 GHz and the inductors connected to the two metal stubs are 0.1n and dni, respectively; Figure 45 is the two-dimensional gain pattern when the metal stub in Figure 18 resonates at 3.6 GHz and the inductors connected to the two metal stubs are dni and 0.2n, respectively.

[0199] In Figure 43(a), A1 = 0.36λ and in Figure 43(b), A1 = 0.38λ both correspond to a distance of 10mm between the connection position of the metal branch on the corresponding edge and the first edge. In Figure 43(a), A2 = 0.71λ and in Figure 43(b), A2 = 0.75λ both correspond to a distance of 20mm between the connection position of the metal branch on the corresponding edge and the first edge.

[0200] Wherein, L1 corresponds to the value of the matching circuit connecting the first choke structure 31 and the second choke structure 32 in Figure 18, and L2 corresponds to the value of the matching circuit connecting the third choke structure 33 and the fourth choke structure 34 in Figure 18.

[0201] As can be seen from Figures 18 and 43, when the first choke structure 31 and the second choke structure 32 are connected to a small inductor, the effect of the choke structure is to broaden the beam regardless of the matching of the third choke structure 33 and the fourth choke structure 34. When the third choke structure 33 and the fourth choke structure 34 are connected to a small inductor and the first choke structure 31 and the second choke structure 32 are disconnected, the effect of the choke structure is to improve the directivity. That is to say, under this structure, the radiation pattern control effect of the choke structure is mainly based on the state of the first pair of choke structures.

[0202] As can be seen from Figures 44 and 45, when the choke structure resonates at 3.6 GHz, D in Figure 44... LHCP Under conditions of ≥-6dBic, it can cover beam broadening with θ≤93°. In Figure 45, D can be achieved with θ≤±15°. LHCPThe circular polarization directionality is improved by ≥2dBic.

[0203] Please refer to Figure 46, which is a two-dimensional orientation diagram of the YOZ plane when the metal stub in Figure 17 is located in the fourth position and the metal stub is connected to different matching circuits.

[0204] As shown in Figure 46(a), when the first choke structure 31 and the second choke structure 32 are grounded, and the third choke structure 33 and the fourth choke structure 34 are disconnected, the radiation pattern in the 3.4-3.6 GHz range achieves beam broadening. As shown in Figure 46(b), the radiation pattern in the 3.4-3.6 GHz range exhibits improved directivity when the third choke structure 33 and the fourth choke structure 34 are grounded, and the first choke structure 31 and the second choke structure 32 are disconnected.

[0205] Because the first choke structure 31 and the third choke structure 33 are placed face-to-face, resulting in strong coupling between the metal branches, and the second choke structure 32 and the fourth choke structure 34 are also placed face-to-face, resulting in strong coupling between the metal branches, when the first choke structure 31 and the second choke structure 32 are connected to an inductor of 0.8n and the third choke structure 33 and the fourth choke structure 34 are grounded, the first choke structure 31 and the third choke structure 33 can be equivalent to a long metal branch, and the second choke structure 32 and the fourth choke structure 34 can be equivalent to a long metal branch, as shown in Figure 46(c). Its resonant frequency is at 2.5GHz, and at this frequency, the effect of improving directivity can be achieved.

[0206] Please refer to Figures 47-49. Figure 47 shows the two-dimensional radiation pattern of the YOZ plane when the metal stub in Figure 7 is located at the fifth position and connected to different matching circuits; Figure 48 shows the two-dimensional gain radiation pattern of the metal stub in Figure 7 at 2.2 GHz; and Figure 49 shows the two-dimensional gain radiation pattern of the metal stub in Figure 7 at 3.4 GHz.

[0207] In Figure 47(a), A1 = 0.14λ and in Figure 47(b), A1 = 0.22λ both correspond to a second connection point where the edge connects to the metal branch and a distance of 6mm between the first edge and the second connection point; in Figure 47(a), A2 = 0.32λ and in Figure 47(b), A2 = 0.5λ both correspond to a second connection point where the edge connects to the metal branch and a distance of 14mm between the first edge and the second connection point.

[0208] As shown in Figure 47(a), when the two connection points near the first edge of the F-type metal stub in Figure 7 are grounded, and the two connection points far from the first edge of the F-type metal stub in Figure 7 are disconnected, the metal stub can be equivalent to a long L-type stub, achieving a pattern broadening effect at 2.2 GHz. Its 2D pattern is given in Figure 48, realizing the D... LHCPUnder conditions of ≥-6dBic, it can cover θ≤80°. As shown in Figure 47(b), when the two connection points near the first edge of the F-type metal stub in Figure 7 are disconnected, and the two connection points away from the first edge of the F-type metal stub in Figure 7 are grounded, the metal stub can be equivalent to a T-type stub, achieving a 1.8dB improvement in directivity at 3.4GHz; when the two connection points near the first edge of the F-type metal stub are grounded, and the two connection points away from the first edge of the F-type metal stub in Figure 7 are connected to an inductor of 0.3n, as shown in Figure 49, the beamwidth at 3.4GHz is broadened to 151°, in D LHCP Under conditions of ≥-6dBic, it can cover θ≤93°.

[0209] Please refer to Figures 50-52. Figure 50 is a two-dimensional radiation pattern of the vertical plane when the metal stub in Figure 7 is located at the sixth position and connected to different matching circuits; Figure 51 is a two-dimensional gain radiation pattern of the metal stub in Figure 7 resonating at 1.52 GHz; Figure 52 is a two-dimensional gain radiation pattern of the metal stub in Figure 7 resonating at 2.2 GHz.

[0210] As shown in Figure 51, when the two connection points near the first edge of the F-type metal stub in Figure 7 are grounded, and the two connection points away from the first edge of the F-type metal stub in Figure 7 are disconnected, the metal stub resonates at 1.52 GHz, widening the beamwidth at this frequency, in D LHCP Under conditions of ≥-6dBic, it can cover θ≤90°.

[0211] As shown in Figure 52, when the two connection points near the first edge of the F-type metal stub in Figure 7 are connected to the two connection points away from the first edge and are connected to an inductor of 0.6n, the metal stub resonates at 2.2GHz, widening the beamwidth at that frequency. LHCP Under conditions of ≥-6dBic, it can cover θ≤90°.

[0212] When the two connection points near the first edge of the F-type metal stub in Figure 7 are disconnected, and the two connection points far from the first edge of the F-type metal stub in Figure 7 are connected to an inductor of 0.6n, the metal stub resonates at 2.2GHz, which can improve directivity compared to resonating at 1.52GHz.

[0213] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0214] The above are the implementation methods of the embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the embodiments of this application, and these improvements and modifications are also considered to be within the protection scope of this application.

Claims

1. A terminal device, characterized in that, The terminal device includes: An antenna element, including a radiator, wherein the radiator resonates in the target frequency band; A metal floor, the edges of which include at least a first edge, a second edge and a third edge, the radiator is disposed adjacent to the first edge, the second edge and the third edge are both connected to the first edge and disposed at an angle, when the radiator resonates in the target frequency band, the metal floor is coupled with the radiator and excited to generate a current; At least one choke structure, including a choke structure connected to the first edge and satisfying a first positional relationship with the radiator projection on the first edge; and / or, including a choke structure connected to at least one of the second edge and the third edge and satisfying a second positional relationship with the radiator projection; the at least one choke structure resonates in the target frequency band; the first positional relationship is that the edge length between the connection position of the choke structure on the first edge and the target current point is p or mλ / 4±p, where m is an even number greater than 0, 0≤p≤λ / 10, and λ is the wavelength corresponding to the target frequency band; the second positional relationship is that the edge length between the connection position of the choke structure on the corresponding edge and the target current point is k or nλ / 4±k, where n is a positive integer, 0≤k≤λ / 10; in the non-radiator projection area on the edge of the metal floor, the current point closest to the radiator projection is the target current point, and the non-radiator projection area is the area outside the area where the radiator projection is located.

2. The terminal device according to claim 1, characterized in that, The at least one choke structure is disposed in the metal floor, or disposed outside the metal floor and connected to the metal floor, or when there are two or more choke structures, at least one of the choke structures is disposed in the metal floor, and at least one of the choke structures is disposed outside the metal floor and connected to the metal floor.

3. The terminal device according to claim 2, characterized in that, When the choke structure is disposed in the metal floor, the choke structure is a choke groove formed by cutting a groove in the metal floor, and part of the choke groove is located on the corresponding edge.

4. The terminal device according to claim 1, characterized in that, When the choke structure is located outside the metal floor and connected to the metal floor, the choke structure includes metal branches, and the metal branches are connected to the corresponding edges of the metal floor.

5. The terminal device according to claim 4, characterized in that, The choke structure also includes a matching circuit, and the metal stub is connected to the matching circuit so that the choke structure resonates in the target frequency band.

6. The terminal device according to claim 1, characterized in that, The shape of the choke structure includes at least one of "L", "T" and "F" shapes.

7. The terminal device according to claim 1, characterized in that, The choke structure is connected to at least one of the second edge and the third edge. The edge length between the connection position of the choke structure on the corresponding edge and the target current point is nλ / 4±k, where n is a positive odd number, 0≤k≤λ / 10. The choke structure is "L" shaped and includes a first part parallel to the corresponding edge and a second part perpendicular to the corresponding edge. The first part and the second part are connected to form an "L" shape. The first part includes a first end and a second end, and the second part includes a third end and a fourth end. The first end of the first part is connected to the third end of the second part, and the fourth end of the second part is connected to the corresponding edge. The first end is closer to the radiator than the second end.

8. The terminal device according to claim 1, characterized in that, The resonant mode corresponding to the radiator is a 1 / 2 wavelength mode. There are two target current points, which are located on both sides of the projection of the radiator. The edge length between any target current point and the midpoint of the projection of the radiator is λ / 4.

9. The terminal device according to claim 1, characterized in that, The resonant mode corresponding to the radiator is a 1 / 4 wavelength mode. There are two target current points, which are located on both sides of the projection of the radiator. The edge length between the target current points and the projection position of the grounding point of the radiator on the first edge is λ / 2.

10. The terminal device according to any one of claims 1-7, characterized in that, The at least one choke structure includes a first choke structure, which is connected to either the second edge or the third edge. The edge length between the connection position of the first choke structure on the corresponding edge and the target current point is k1 or n1λ / 4±k1, where n1 is a positive integer and 0≤k1≤λ / 10.

11. The terminal device according to claim 10, characterized in that, The at least one choke structure further includes a second choke structure. The first choke structure is connected to either the second edge or the third edge. The second choke structure is connected to either the second edge or the third edge. The edge length between the connection position of the second choke structure on the corresponding edge and the target current point is k2 or n2λ / 4±k2, where n2 is a positive integer and 0≤k2≤λ / 10.

12. The terminal device according to claim 11, characterized in that, The first choke structure is connected to the second edge, the second choke structure is connected to the third edge, n1 = n2, and the projections of the first choke structure and the second choke structure on the second edge at least partially overlap.

13. The terminal device according to claim 11, characterized in that, The at least one choke structure further includes a third choke structure, which is connected to either the second edge or the third edge, and the edge length between the connection position of the third choke structure on the corresponding edge and the target current point is k3 or n3λ / 4±k3, where n3 is a positive integer and 0≤k3≤λ / 10.

14. The terminal device according to claim 13, characterized in that, The at least one choke structure further includes a fourth choke structure, the third choke structure is connected to the second edge, the fourth choke structure is connected to the third edge, and the edge length between the connection position of the fourth choke structure on the corresponding edge and the target current point is k4 or n4λ / 4±k4, and the projections of the third choke structure and the fourth choke structure on the second edge at least partially overlap, wherein n3=n4, 0≤k4≤λ / 10.

15. The terminal device according to claim 14, characterized in that, The first choke structure, the second choke structure, the third choke structure, and the fourth choke structure are all "L" shaped, and the first end of the first part of the first choke structure and the second choke structure is closer to the first edge than the second end, and the first end of the first part of the third choke structure and the fourth choke structure is farther away from the first edge than the second end.

16. The terminal device according to claim 14, characterized in that, The first choke structure includes a first metal stub and a first switching unit, wherein the first switching unit is connected between the first metal stub and the metal floor. The second choke structure includes a second metal stub and a second switching unit, wherein the second switching unit is connected between the second metal stub and the metal floor. The third choke structure includes a third metal branch and a third switching unit, wherein the third switching unit is connected between the third metal branch and the metal floor. The fourth choke structure includes a fourth metal stub and a fourth switching unit, wherein the fourth switching unit is connected between the fourth metal stub and the metal floor. Wherein, the projections of the first choke structure and the second choke structure on the second edge at least partially overlap, and the first choke structure is closer to the first edge than the third choke structure; Wherein, the first switch unit and the second switch unit have the same on / off state, and the third switch unit and the fourth switch unit have the same on / off state, and are opposite to the on / off state of the first switch unit and the second switch unit. Specifically, when the first and second switching units are turned on, the first and second choke structures perform choking functions; when the third and fourth switching units are turned on, the third and fourth choke structures perform choking functions.

17. The terminal device according to claim 1, characterized in that, The choke structure is F-shaped and includes a metal branch and two switching units. The metal branch includes two spaced-apart first connection points. The two first connection points are connected one-to-one with two spaced-apart second connection points of the metal floor through the two switching units. When different switching units are turned on, the different first connection points of the metal branch are connected to the different second connection points of the metal floor, so that the connection positions of the choke structure on the corresponding edges are different, thus satisfying either a first position relationship or a second position relationship.

18. The terminal device according to claim 1, characterized in that, The at least one choke structure includes a fifth choke structure, which is disposed adjacent to the first edge, and the edge length between the connection position of the fifth choke structure on the first edge and the target current point is p1 or m1λ / 4±p1, where m1 is an even number greater than 0, and 0≤p1≤λ / 10.

19. The terminal device according to claim 1, characterized in that, The terminal device is a foldable device, which includes a first main body, a second main body, and a connecting structure. Both the first main body and the second main body are connected to the connecting structure and can be folded or unfolded through the connecting structure. The second edge is the edge of the first main body opposite to the connecting structure, and the third edge is the edge of the second main body opposite to the connecting structure. The first edge includes a first sub-edge and a second sub-edge. The first sub-edge is located in the first main body and connected to the second edge, and the second sub-edge is located in the second main body and connected to the third edge. The first sub-edge and the second sub-edge are located on the same side of the foldable device. The radiator is disposed in the first main body and adjacent to the first sub-edge, or the radiator is disposed in the second main body and adjacent to the second sub-edge.

20. The terminal device according to claim 1, characterized in that, The target frequency band is any one or more of 1610–1626.5MHz, 2483.5–2500MHz, 1980–2010MHz, and 2170–2200MHz.

21. The terminal device according to claim 1, characterized in that, The antenna unit is a Tiantong satellite antenna and / or a Beidou satellite antenna.

22. The terminal device according to claim 1, characterized in that, In the edge connected to the choke structure, the current intensity on the side of the edge closer to the radiator at the connection position with the choke structure is greater than the current intensity on the side of the connection position farther from the radiator.

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