Terminal antenna and terminal device

Abstract

The application discloses a terminal antenna and a terminal device. The terminal antenna comprises an outer layer radiator and a first inner layer radiator. A break on the outer layer radiator comprises a first break and a second break. The first break and the second break divide the outer layer radiator into a first branch, a second branch and a third branch. The first inner layer radiator is connected to the first branch through a connection point. The first inner layer radiator extends from the connection point to the direction of the second break. A first gap is formed between the first inner layer radiator and the first branch. The radiator of a first antenna comprises the first inner layer radiator and a first part of the second branch. The radiator of a second antenna comprises a second part of the second branch and the third branch. A first feed point of the first antenna is connected to the radiator of the first antenna. A second feed point of the second antenna is connected to the radiator of the second antenna. The first part is a part from the first break to the connection point. The second part is a part from the connection point to the second break.

Description

Technical Field

[0001] This application belongs to the field of terminal antenna technology, specifically relating to a terminal antenna and a terminal device. Background Technology

[0002] In related technologies, mobile terminals (e.g., mobile phones) integrate numerous components, and the available space for terminal antennas is relatively small. When a mobile terminal has antennas with multiple functions, how to improve the performance of one type of antenna without affecting the performance of other antennas is a problem that needs to be solved in related technologies. Summary of the Invention

[0003] This application aims to provide a terminal antenna and a terminal device to solve the problem of how to improve the performance of one type of antenna without affecting the performance of other antennas when a mobile terminal has antennas with multiple functions.

[0004] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, embodiments of this application propose a terminal antenna, comprising: an outer radiator and a first inner radiator, wherein the slits on the outer radiator include: a first slit and a second slit, the first slit and the second slit dividing the outer radiator into a first segment, a second segment, and a third segment, the first segment being located between the first slit and the second slit, the second segment being adjacent to the first slit, the third segment being adjacent to the second slit, a first return point being provided on the second segment, a second return point being provided in the middle region of the first segment, and a third return point being provided on the third segment; the first inner radiator is connected to the first segment via a connection point, the first inner radiator extending from the connection point toward the second slit, and the first inner radiator... An inner radiator has a first gap with the first stub; the radiator of the first antenna includes: the first inner radiator and a first part of the second stub, the radiator of the second antenna includes: a second part of the second stub and the third stub, a first feed point of the first antenna is connected to the radiator of the first antenna, a second feed point of the second antenna is connected to the second part of the first stub A1, wherein the first part is the part from the first gap to the connection point, the second part is the part from the connection point to the second gap, the second return point G2 is located between the connection point W1 and the second gap SL2, and the distance between the second return point G2 and the connection point W1 is less than the distance between the second return point G2 and the second gap SL2.

[0005] Secondly, embodiments of this application propose a terminal device including the terminal antenna described in the first aspect above.

[0006] In the embodiments of this application, by setting the first inner radiator as an antenna stub, the space directly above the outer radiator can be reused, and the radiation length of the first antenna can be increased without changing the projection clearance of the second antenna, thereby improving the performance of the first antenna without affecting the performance of the second antenna.

[0007] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0008] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of a combination of a GPS L5 band antenna and a cellular antenna in related technologies; Figure 2 This is a schematic diagram of another combination of GPS L5 band antenna and cellular antenna in related technologies; Figure 3 This is a schematic diagram of the structure of a terminal antenna according to some embodiments of this application; Figure 4 This is a schematic diagram of the structure of another terminal antenna according to some embodiments of this application; Figure 5 This is a schematic diagram of the structure of another terminal antenna according to some embodiments of this application; Figure 6 This is a schematic diagram of the structure of another terminal antenna according to some embodiments of this application; Figure 7 This is a schematic diagram of the structure of the first tuning module M1 according to some embodiments of this application; Figure 8 This is a schematic diagram of the structure of another terminal antenna according to some embodiments of this application; Figure 9 This is a schematic diagram of the structure of the matching module M3 according to some embodiments of this application; Figure 10 This is a schematic diagram of the structure of another terminal antenna according to some embodiments of this application; Figure 11 This is a schematic diagram of the structure of another terminal antenna according to some embodiments of this application; Figure 12 This is a 3D structural schematic diagram of a terminal antenna according to an exemplary embodiment of this application; Figure 13 This is a schematic diagram of the current when GPS L5 is working in an exemplary embodiment of this application; Figure 14 The efficiency comparison curve of the GPS L5 antenna in an exemplary embodiment of this application is shown; Figure 15A The current distribution within the GPS L5 operating frequency band in traditional solutions; Figure 15B This is an exemplary embodiment of the present application showing the common-mode current distribution of the T-antenna at a frequency slightly below the GPS L5 band; Figure 15C This is an exemplary embodiment of the present application showing the differential mode current distribution of the T-antenna in the GPS L5 operating frequency band; Figure 15D The current distribution of the decorative ring half-wavelength mode after common-mode coupling of the T antenna slightly above the GPS L5 band in an exemplary embodiment of this application; Figure 16 A schematic diagram of the terminal antenna structure in another exemplary embodiment of this application is shown; Figure 17 A schematic diagram of the structure of a terminal antenna according to another exemplary embodiment of this application is shown; Figure 18 A schematic diagram of the structure of another terminal antenna in another exemplary embodiment of this application is shown; Figure 19 A schematic diagram of the structure of a terminal antenna in yet another exemplary embodiment of this application is shown; Figure 20 This invention provides a schematic diagram of the current during GPS L5 operation in yet another exemplary embodiment of this application. Figure 21 A schematic diagram of the structure of a terminal antenna in yet another exemplary embodiment of this application is shown.

[0009] Reference numerals: Outer radiator A0, first inner radiator A5, first gap SL1, second gap SL2, first branch A1, second branch A2, third branch A3, first return point G1, second return point G2, third return point G3, connection point W1, first gap SL3, first feed point F1, second feed point F2, first tuning module M1, fourth feed point F4, first capacitor C0, first filter module LC1, second filter module LC2, second capacitor C1, inductor L1, third capacitor C2, second tuning module M2, third feed point F3, matching module M3, switch module SW1, first device SH1, second device SE1, second inner radiator A6, metal ring A4, and fourth return point G4. Detailed Implementation

[0010] Embodiments of the present invention will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0011] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0012] In the description of the embodiments of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this application.

[0013] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0014] Figure 1 and Figure 2 This diagram illustrates a combination of two GPS L5 band antennas and cellular antennas in related technologies. Figure 1 and Figure 2 In the image, the central square shaded area represents a portion of the phone's main location. Figure 1In this design, the GPS L5 band antenna is located at the upper right corner with the opening facing downwards. F1' is its feed point, G1' is its return point, and A1' is the metal frame that serves as the GPS L5 radiator. SL1' and SL2' are the two side metal frame gaps. F2', located above the lower gap SL2', serves as the feed point for the cellular antenna, and G2' is the return point for the cellular antenna. This design occupies a large space, requiring the entire space from the upper right corner of the phone to the gap SL2' to be occupied. Furthermore, the GPS L5 operating mode only uses part A1', resulting in low antenna efficiency. Figure 2 In this design, the GPS L5 antenna and the cellular antenna share a metal frame A2' between the gaps SL1' and SL2'. F1' is the feed point of the GPS L5, F2' is the feed point of the cellular antenna, and G2' is the common return point for both. The GPS L5 radiates using the frame between SL1' and G2', while the cellular antenna radiates using the frame between SL2' and G2'. Although this design reduces the space required, the GPS L5 only utilizes the area between SL1' and G2' for radiation, resulting in insufficient radiator size and a single radiating mode, leading to low antenna efficiency.

[0015] Therefore, in related technologies, when a mobile terminal has an antenna with multiple functions, the available space for the antenna is limited, making it difficult to improve the antenna's performance. Thus, this application provides an improved terminal antenna to enhance its performance.

[0016] The following is combined Figures 3-21 Describes a terminal antenna according to an embodiment of this application.

[0017] like Figure 3 As shown, a terminal antenna according to some embodiments of this application may include: an outer radiator A0 and a first inner radiator A5, wherein the slits provided on the outer radiator A0 include: a first slit SL1 and a second slit SL2, the first slit SL1 and the second slit SL2 dividing the outer radiator A0 into a first branch A1, a second branch A2 and a third branch A3, the first branch A1 being located between the first slit SL1 and the second slit SL2, the second branch A2 being adjacent to the first slit SL1, the third branch A3 being adjacent to the second slit SL2, a first return point G1 being provided on the second branch A2, a second return point G2 being provided in the middle region of the first branch A1, and a third return point G3 being provided on the third branch A3.

[0018] In this embodiment, the outer radiator A0 can be the outer metal frame of the terminal, and the first inner radiator A5 can be the inner metal frame of the terminal.

[0019] In the embodiments of this application, such as Figure 3As shown, the first inner radiator A5 is connected to the first branch A1 through the connection point W1. The first inner radiator A5 extends from the connection point W1 toward the second fracture SL2, and there is a first gap SL3 between the first inner radiator A5 and the first branch A1.

[0020] In some embodiments, the width of the first gap SL3 can be set based on the actual application; for example, the width of the first gap SL3 can be less than 0.5 mm.

[0021] In the above embodiments, the first inner radiator A5 does not occupy the projected clearance of the outer radiator A0, and is used relative to the motherboard bracket for flexible circuit board (PFC) antennas or laser-formed antennas. Direct The structuring (LDS) antenna has a first inner radiator A5 that can be closer to the outer frame of the terminal, has a larger cross-sectional area, and has better radiation performance.

[0022] In this embodiment, the radiator of the first antenna includes: a first inner radiator A5 and a first portion of the first branch A1; the radiator of the second antenna includes: a second portion of the first branch A1 and the third branch A3; a first feed point F1 of the first antenna is connected to the radiator of the first antenna; a second feed point F2 of the second antenna is connected to the second portion of the first branch A1; wherein, the first portion is the portion from the first gap SL1 to the connection point W1; the second portion is the portion from the connection point W1 to the second gap SL2; the second return point G2 is located between the connection point W1 and the second gap SL2; and the distance between the second return point G2 and the connection point W1 is less than the distance between the second return point G2 and the second gap SL2.

[0023] In this embodiment of the application, the distance between the connection point W1 and the second return point G2 is less than a preset threshold. That is, the connection point W1 is near the second return point G2. Specifically, the distance between the connection point W1 and the second return point G2 can be determined based on the actual application, and is not limited in this embodiment of the application.

[0024] In this embodiment, the first antenna can be a Global Positioning System (GPS) L5 band antenna, the second antenna can be a cellular antenna, and the radiator of the second antenna can also include the portion of the third branch A3 from the second slit SL2 to the location of the third return point G3.

[0025] By using the terminal antenna provided in the embodiments of this application, and by setting the first inner radiator A5 as an antenna stub, the space directly above the outer radiator A0 can be reused. Without changing the projection clearance of the second antenna, the radiation length of the first antenna can be increased, thereby improving the performance of the first antenna without affecting the performance of the second antenna.

[0026] In some embodiments, such as Figure 4 As shown, the terminal antenna may further include a first tuning module M1, one end of which is connected to the radiator of the first antenna, and the other end is grounded. In these embodiments, the first tuning module M1 can be used to load the common mode of the first antenna to a frequency band lower than the operating frequency of the first antenna.

[0027] In some embodiments, such as Figure 4 As shown, the first feed point F1 is connected to a first position of the radiator of the first antenna, wherein the first position is located at one end of the first stub A1 near the first gap SL1; one end of the first tuning module M1 is connected to a second position of the radiator of the first antenna, wherein the second position is located on the first inner radiator A5.

[0028] In the above embodiment, the first inner radiator A5 and the first branch A1 from SL1 to W1, plus the second return point G2, can form a T-shaped antenna, so that the first antenna obtains the common-mode and differential-mode dual-mode addition of the T antenna.

[0029] In some embodiments, such as Figure 5 As shown, the first feed point F1 is connected to a first position of the radiator of the first antenna, wherein the first position is located on the first inner radiator A5; one end of the first tuning module M1 is connected to a second position of the radiator of the first antenna, wherein the second position is located at the end of the first branch A1 near the first gap SL1.

[0030] In the above embodiment, the first feed point F1 is set on the first inner metal branch A3, and the first tuning module M1 is set on the first branch A1 near the upper first fracture SL1. This arrangement can excite and... Figure 4 The similar working mode can also increase the selection of the position of the first feed point F1, making the layout of the first feed point F1 and the second feed point F2 more concentrated.

[0031] In some embodiments, such as Figure 6As shown, the terminal antenna may further include a fourth feed point F4 of the third antenna, the fourth feed point F4 being connected to the third position of the first stub A1, the third position being adjacent to the first position; and a first capacitor C0, one end of the first capacitor being connected to the fourth position of the first stub A1, and the other end being grounded, wherein the fourth position is adjacent to the third position and is located on the side of the third position away from the first position.

[0032] In the above embodiment, the third antenna can be an N78 / N79 antenna, and a fourth feed point F4 is set at the third position of the first branch A1. The third antenna is grounded through the first capacitor C0 below the fourth feed point F4. At the same time, the common mode frequency position of the first antenna can also be adjusted through the first capacitor C0.

[0033] In the above embodiments, the third position is adjacent to the first position, and the first position can be used to house the first tuning module M1 (e.g. Figure 6 (as shown), or, the first position can also be set to the first feed point F1.

[0034] In some embodiments, such as Figure 6 As shown, the terminal antenna may further include: a first filtering module LC1 and a second filtering module LC2, wherein the first filtering module LC1 is connected in series between the first feed point F1 and the radiator of the first antenna; and the second filtering module LC2 is connected in series between the fourth feed point F4 and the first stub A1.

[0035] In the above embodiments, by connecting the first filter module LC1 in series on the feed line of the first feed point F1, low pass and high impedance can be achieved, thereby reducing the influence of the first antenna on the second antenna. By connecting the second filter module LC2 in series on the feed line of the fourth feed point F4, high pass and low impedance can be achieved, thus reducing the influence of the third antenna on the first antenna.

[0036] In some embodiments, such as Figure 7 As shown, the first tuning module M1 may include: a second capacitor C1, an inductor L1 and a third capacitor C2, wherein the second capacitor C1 is connected in parallel with the inductor L1 and then connected in series with the third capacitor C2.

[0037] Through the above embodiments, the first tuning module M1 selects an LC design with a combination of capacitor and inductor. By setting the LC to be in an open state near the operating frequency band of the second antenna and in a small capacitance state in the operating frequency band of the first antenna, for example, C1 can be 2.4pF, L1 can be 0.8nH, and C2 can be 1.5pF, the influence of the first inner radiator A5 on the second antenna can be reduced.

[0038] It should be noted that although the above embodiment uses the first tuning module M1 including the second capacitor C1, inductor L1 and third capacitor C2 as an example, it is not limited to this. In practical applications, multiple different LC combinations of capacitors and / or inductors can also be set. Each combination is connected between the first branch A1 and ground through a switch. By switching different LC combinations of capacitors and / or inductors, the second antenna can obtain optimal performance in different frequency bands, and the influence of LC on the first antenna in some frequency bands can also be reduced.

[0039] In some embodiments, such as Figure 8 As shown, the terminal antenna may further include a second tuning module M2; wherein one end of the second tuning module M2 is connected to the fifth position of the second stub A2, and the other end is grounded, the fifth position being located between the first return point G1 and the first gap SL1. Furthermore, the distance between the fifth position and the first return point G1 is greater than the distance between the fifth position and the first gap SL1.

[0040] In these embodiments, the distance between the first return point G1 and the first break SL1 can be greater than a first preset value, wherein the first preset value can be determined according to the actual application.

[0041] In the above embodiment, the first return point G1 on the second branch can be set at a distance further from the first gap SL1 to increase the length from the first return point G1 to SL1. A second tuning module M2, which is grounded, is added to the second branch A2 near the first gap SL1. The second tuning module M2 can be a capacitor, an inductor, or an LC network composed of capacitors and inductors. For example, the second tuning module M2 can be set as a capacitor of about 1~3pF. The second tuning module M2 can be used to load the electrical length from the first return point G1 to the first gap SL1 to a position slightly higher than the first antenna, thereby constructing a slot mode (including common mode and differential mode) from the second return point G2 to the first return point G1. Furthermore, the second tuning module M2 can also serve as the current return path for the third antenna.

[0042] In some embodiments, such as Figure 8 As shown, the terminal antenna may further include: a third feed point F3 of the fourth antenna and a matching module M3; wherein, the third feed point F3 is connected to the sixth position of the third stub A3 through the matching module M3, the sixth position is located between the third return point G3 and the second break SL2, and the distance between the sixth position and the third return point G3 is greater than the distance between the sixth position and the second break SL2.

[0043] In these embodiments, the distance between the third return point G3 and the second fracture SL2 can be greater than a second preset value, which can be determined according to the actual application.

[0044] In the above embodiment, the third return point G3 of the third branch A3 can be set at a distance that is a little farther from the second break SL2, for example, by moving it down by about 40~50mm. This allows the third feed point F3 of the low-frequency antenna to be added to the third branch A3 near SL2, thereby increasing the operating frequency band of the terminal antenna.

[0045] In some embodiments, such as Figure 9 As shown, the matching module M3 may include: a switch module SW1, at least one first device SH1, and at least one second device SE1, wherein one end of each first device SH1 is connected to the switch module SW1, and the other end is grounded, and the first devices SH1 are connected in parallel; one end of each second device SE1 is connected to the switch module SW1, and the other end is connected to the third feed point F3, and the second devices SE1 are connected in parallel; the switch module is used to connect the at least one second device SE1 to the third stub A3 when the fourth antenna is working, and to connect the at least one first device SH1 to the third stub A3 when the first antenna is working.

[0046] In this embodiment, the first device SH1 and the second device SE1 can be an inductor or a capacitor, and the specific implementation is not limited thereto.

[0047] Optionally, the multiple first devices SH1 can be different devices, and the multiple second devices SE can also be different devices. The difference can be that the device types are different, or that the same device has different parameters. For example, the parameters of the inductor are different, or the capacitance values ​​of the capacitor are different.

[0048] In the above embodiment, when the first antenna is working, SE1 can be disconnected to avoid its influence on the first antenna. At the same time, the third stub A3 is loaded into the frequency range of the first antenna through SH1, so that the antenna energy of the first inner radiator A5 is coupled to the third stub A3, forming a new quarter-wavelength working mode I31 of the first antenna from the third return point G3 to the second gap SL2, thereby improving the efficiency of the first antenna.

[0049] In some embodiments, such as Figure 10As shown, the terminal antenna may further include: a second inner radiator A6, the second inner radiator A6 being connected to the first stub A1 via a connection point W1, the second inner radiator A6 extending from the connection point W1 toward the first gap SL2, and a second gap between the second inner radiator A6 and the first stub A1.

[0050] In the above embodiments, the inner radiator can be configured to be bidirectional, namely a first inner radiator A5 and a second inner radiator A6, thereby increasing the operating frequency band of the first antenna through the second inner radiator A6.

[0051] Optionally, the length of the second inner radiator A6 may be shorter than that of the first inner radiator A5.

[0052] In some embodiments, such as Figure 10 As shown, the terminal antenna may further include: a third tuning module M4, one end of which is connected to the seventh position of the second inner radiator A6, wherein the seventh position is located at the end of the second inner radiator A6 away from the connection point W1.

[0053] In the above embodiment, by adjusting the third tuning module M4 disposed on the second inner radiator A6 and grounded, the first antenna can operate in the first frequency band through the SL1 to W1 segment of the first stub A1 and in the second frequency band through the second inner radiator A6, thereby forming the dual-frequency operation of the first antenna.

[0054] In the above embodiments, such as Figure 11 As shown, the terminal antenna may further include: a metal ring A4, which is disposed on the housing (e.g., outer shell) of the terminal, and the projection of the metal ring A4 in the thickness direction of the terminal does not overlap with the outer radiator, and a fourth return point G4 is disposed on the side of the metal ring A4 away from the first branch A1.

[0055] In the above embodiments, the metal ring A4 can be the rear camera metal decorative ring of the terminal. In specific applications, the metal ring A4 can be in an open circuit state and be coupled with the first inner radiator A5, which is also in an open circuit state, in close-range electric field. The energy of the first antenna is coupled to the metal ring A4 through the first inner radiator A5 to form a third working mode, further enhancing the radiation efficiency of the first antenna.

[0056] The following description uses an example where the first antenna is a GPS L5 antenna and the second antenna is a cellular antenna to illustrate the terminal antenna provided in the embodiments of this application.

[0057] Figure 12 This is a 3D structural schematic diagram of a terminal antenna according to an exemplary embodiment of this application. The antenna layout of the terminal antenna can be as follows: Figure 11 As shown. In Figure 11 In the diagram, the black outline represents the terminal's metal frame, which can be made of die-cast aluminum alloy or other processed metal materials. The square shaded area G0 in the center represents part of the terminal's main ground plane. SL1 and SL2 are the metal frame seams. F1 is the GPS L5 antenna feed point, and F2 is the cellular antenna feed point. A1 is the metal frame between SL1 and SL2, A2 is the metal frame above SL1, and A3 is the metal frame below SL2. G1 is the return point above SL1, G2 is the return point in the middle area of ​​A1, and G3 is the return point below SL2. A5 is the inner metal frame, which connects to the frame A1 at point W1 near G2. A5 extends from W1 towards SL2. SL3 is the first gap between A5 and A1 (the section from W1 to SL2). The width of this first gap can be as small as approximately 0.5mm.

[0058] In this embodiment, A5 does not occupy the projected clearance of the frame antenna, and compared with the motherboard bracket as an FPC antenna or LDS antenna, A5 can be placed further out and has a larger cross-sectional area, thus having better radiation performance.

[0059] In this embodiment, A5 and A1 (segment from SL1 to W1) plus ground return G2 form a T-type antenna for GPS L5, so that L5 can obtain the common-mode and differential-mode dual-mode addition of the T antenna.

[0060] M1 is the loading tuning point connecting radiator A5 to ground. M1 can be a capacitor, inductor, or LC combination. Since the A5 stub length is usually insufficient, optionally, a capacitor can be loaded at M1 to load the common mode of the T-antenna to a frequency band lower than GPS L5. However, to reduce the impact of A5 on the high frequencies of the cellular antenna (such as N41 / N78), it is best not to load A5. Therefore, M1 can be selected as an LC design with a capacitor and inductor combination, such as... Figure 7 As shown, capacitor C1 and inductor L1 are connected in parallel, and then capacitor C2 is connected in series. This LC circuit can be configured to be open near N78 and in a small capacitance state in the L5 frequency band. Typical values ​​can be C1 2.4pF, L1 0.8nH, and C2 1.5pF.

[0061] Alternatively, M1 can be configured as a switch, allowing for the switching of different combinations of capacitors, inductors, and LCs, so that the cellular antenna can achieve optimal performance in different frequency bands, and the impact of LC on L5 in some frequency bands can also be reduced.

[0062] In this embodiment, the black ring A4 is a rear-facing metal decorative ring, and G4 is a grounding point on the left side of the decorative ring. This grounding point should be located on the left side of the decorative ring, as close as possible to the leftmost side. This allows the right side of the decorative ring to be in an open-circuit state, enabling close-range electric field coupling with the A5 branch, which is also in an open-circuit state. The energy of L5 is coupled to the decorative ring through A5 to form a third operating mode, further enhancing the radiation efficiency of L5.

[0063] exist Figure 11 and Figure 12 In this diagram, F1 is the power supply for GPS L5, and F2 is the power supply for the cellular MHB. A1 (segment SL1 to W1) and A5 together form the T-shaped radiator of GPS L5. A1 (segment SL2 to W1) and A3 (segment SL2 to G3) together form the slot radiator of the cellular MHB. M1 is the loading tuning point connecting radiator A5 to ground.

[0064] Figure 13 A schematic diagram of the current during GPS L5 operation in this embodiment is shown, as follows: Figure 13 As shown, the basic operating current region of L5 is the area from the outer metal frame SL1 to W1 plus the area from the inner metal frame W1 to W2, which is the T-antenna differential mode with current I13. In the frequency range slightly below L5, there is a reverse T-antenna common mode composed of currents I11 and I12, which needs to be controlled by M1. After electric field coupling between A5 and A4 via spatial coupling path S1, part of the current from L5 will be coupled to the decorative ring A4 through the open end, forming a ring-shaped half-wavelength mode composed of I21, I22, and I23. This ring-shaped mode needs to be set at a position slightly above the L5 frequency band. To couple a half-wavelength mode near the L5 frequency band, the decorative ring A4 needs to be loaded with its surrounding environment so that its circumference's electrical length is near half the wavelength of the L5 frequency. When the ring size or the surrounding environment changes, its mode frequency will change. In this case, a capacitor or inductor can be loaded at a suitable position on the ring to bring it back to the target frequency.

[0065] Figure 14The efficiency comparison curves of the GPS L5 antenna in this embodiment are shown. Total efficiency_1 is the overall efficiency curve of the conventional scheme, and total efficiency_2 is the overall efficiency curve of the scheme in this embodiment. Radiated efficiency_1 is the radiated efficiency curve of the transmission scheme, and radiated efficiency_2 is the radiated efficiency curve of the scheme in this embodiment. It can be clearly seen that in the GPS L5 band around 1.175 GHz, the efficiency of this embodiment is about 2 dB higher than the conventional scheme in both radiated efficiency and total efficiency. The efficiency dip in radiated efficiency_2 at 1.05 GHz is due to the reverse current introduced by the T common-mode, and the efficiency dip at 1.25 GHz is due to the reverse current introduced by the decorative ring half-wavelength mode. Designing the T common-mode at a frequency slightly lower than L5 and the decorative ring half-wavelength mode at a frequency slightly higher than L5 is also to avoid these two high efficiency dips entering the operating frequency band. Figure 15A The current distribution within the GPS L5 operating frequency band in traditional solutions; Figure 15B This embodiment shows the common-mode current distribution of the T-antenna, which is slightly lower than the GPS L5 band. Figure 15C This is the differential mode current distribution of the T antenna within the GPS L5 operating frequency band in this embodiment; Figure 15D This embodiment shows the current distribution in the half-wavelength mode of the decorative ring after common-mode coupling of the T antenna, which is slightly above the GPS L5 band.

[0066] Figure 16 A schematic diagram of the terminal antenna structure in another exemplary embodiment of this application is shown, as follows: Figure 16 As shown, in this embodiment, a feed point F4 for the N78 / N79 antenna is added next to the GPS L5 feed point F1. Optionally, as... Figure 16 The diagram shows a highly efficient operating mode for N78 / N79. A ground capacitor C0, typically around 1pF, can be applied below feed point F4. This allows the N78 / N79 frequency band to return to ground, and slightly lowers the frequency for GPS L5. In this mode, N78 / N79 operates in slot mode from C0 to G1. To avoid mutual interference between feeds F1 and F4, optionally, LC filter networks LC1 and LC2 can be connected in series in each feed. This filter network consists of a capacitor and an inductor connected in parallel, achieving low-pass, high-impedance in feed F1 and high-pass, low-impedance in feed F4.

[0067] Figure 17 A schematic diagram of the terminal antenna structure in another exemplary embodiment of this application is shown, as follows: Figure 17 As shown, in this embodiment, the GPS L5 feed point F1 is placed on the inner metal stub A3, and the T common-mode adjustment device M1 is placed on the outer frame A1 near the upper fracture SL1. This arrangement can excite and... Figure 11 The similar operating mode also allows for more choices in the feed point location of GPSL5, making the layout of feed points F1 and F2 more concentrated.

[0068] Optionally, an LC filter network can be connected in series on the F1 feed to achieve low-pass, high-impedance operation, minimizing the impact on high frequencies in the cell. Alternatively, as... Figure 18 As shown, feed point F4 (N78 / N79) can be added next to M1. LC2 can be connected in series in the path of F4 to achieve high pass and low impedance to eliminate the influence on GPS L5. A ground return capacitor C0 can be added below feed point F4 to provide ground return for N78 / N79. At the same time, the T common mode frequency position of GPS L5 can be adjusted.

[0069] Figure 19 A schematic diagram of the terminal antenna structure in yet another exemplary embodiment of this application is shown, as follows: Figure 19 As shown, in this embodiment, the return point G1 of the frame A2 is moved up to near the corner, increasing the length from G1 to SL1. A second tuning module M2 is added to A2 near SL1, which can be a capacitor, an inductor, or an LC network composed of capacitors and inductors. M2 can be a capacitor of approximately 1-3 pF. Its function is twofold: firstly, to load the electrical length from G1 to SL1 to a position slightly above GPSL5, thus constructing a slot mode (including common mode and differential mode) from G2 to G1 for GPSL5. Figure 20 As shown, a common-mode slot consisting of I32 and I11 is added within the GPS L5 operating frequency band. M2 also serves as the current return path for the N78 / N79 antenna (the aforementioned feed point F4). Additionally, the return point G3 of frame A3 is moved down approximately 40-50mm, and a low-frequency antenna feed point F3 is added near SL2 on A3, as shown in the reference diagram. Figure 9 In the feed path of feed point F3, the matching network M3 adjusts the electrical length of stub A3 (SL2 to G3) through the ground loading combination SH1 of switch SW1, and adjusts the low-frequency matching through the series tuning combination SE1. When GPS L5 is working, SE1 can be disconnected to avoid its influence on L5. At the same time, SH1 loads stub A3 into the L5 frequency band, thereby coupling the energy of L5 on stub A5 to stub A3, forming a new quarter-wavelength operating mode I31 for GPS L5 from G3 to SL2, thus improving the efficiency of GPS L5 antenna.

[0070] Figure 21 A schematic diagram of the terminal antenna structure in another exemplary embodiment of this application is shown, as follows: Figure 21As shown, in this embodiment, a bidirectional inner frame is added, with a metal portion extending inward from point W1 near G2 on A1, and then forming bidirectional inner frames A5 and A6 downward and upward respectively. This design can add the operating frequency band F1 based on embodiment one, with the new frequency band introduced by the A6 stub. By designing A6 to be shorter than A5, and adjusting the ground-loaded third tuning module M4 on the A6 stub (M4 can be a capacitor, an inductor, or an LC network composed of a capacitor and an inductor), A1 (segment from SL1 to W1) plus A6 can operate in the GPS L1 frequency band, thus forming dual-frequency operation of GPS L1 and L5.

[0071] The technical solution provided in this application utilizes a double-layer metal frame design to reuse the space of the GPS L5 antenna and the cellular antenna, significantly reducing the antenna's usable space. Furthermore, the design reuses the space directly above the metal frame for a second layer of metal antenna branches, ensuring no change in the projected clearance of the cellular antenna, thus minimizing the impact on its performance. Additionally, the design reuses the space directly above the metal frame for a second layer of metal antenna branches to create a new mode excitation branch for GPS L5. This branch is located further outwards and is thicker than the support LDS or FPC, resulting in better radiation performance. Moreover, the design of the second layer of metal branches for L5 couples some of the L5's energy to the rear camera decorative ring, further improving the L5 antenna's efficiency. This application also provides an L5 antenna solution that reuses dual cellular antennas, further enhancing L5 antenna efficiency. The bidirectional two-layer metal antenna branches support more current paths, enabling simultaneous operation of more frequency bands, such as supporting simultaneous operation of GPS L1 and L5.

[0072] The terminal antenna implementation process described in this application embodiment can be CNC, metal die casting, FPC, LDS, and other forms.

[0073] This application also provides a terminal device, which may include the terminal antenna described in any of the above embodiments.

[0074] The aforementioned terminal devices can be mobile phones, tablets, laptops, base stations, watches, etc.

[0075] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0076] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A terminal antenna, characterized in that, include: The outer radiator and the first inner radiator, wherein, The slits provided on the outer radiator include: a first slit and a second slit, the first slit and the second slit dividing the outer radiator into a first branch, a second branch and a third branch, the first branch being located between the first slit and the second slit, the second branch being adjacent to the first slit, the third branch being adjacent to the second slit, a first return point being provided on the second branch, a second return point being provided in the middle area of ​​the first branch, and a third return point being provided on the third branch; The first inner radiator is connected to the first branch through a connection point. The first inner radiator extends from the connection point toward the second fracture, and there is a first gap between the first inner radiator and the first branch. The radiator of the first antenna includes: a first inner radiator and a first portion of the first stub; the radiator of the second antenna includes: a second portion of the first stub and a third stub; a first feed point of the first antenna is connected to the radiator of the first antenna; a second feed point of the second antenna is connected to the second portion of the first stub; wherein the first portion is the portion from the first fracture to the connection point; the second portion is the portion from the connection point to the second fracture; the second return point is located between the connection point and the second fracture; and the distance between the second return point and the connection point is less than the distance between the second return point and the second fracture.

2. The terminal antenna according to claim 1, characterized in that, Also includes: The first tuning module has one end connected to the radiator of the first antenna and the other end grounded.

3. The terminal antenna according to claim 2, characterized in that, The first feed point is connected to a first position of the radiator of the first antenna, wherein the first position is located at one end of the first stub near the first break. One end of the first tuning module is connected to a second position on the radiator of the first antenna, wherein the second position is located on the first inner radiator.

4. The terminal antenna according to claim 2, characterized in that, The first feed point is connected to a first position of the radiator of the first antenna, wherein the first position is located on the first inner radiator; One end of the first tuning module is connected to a first position of the radiator of the first antenna, wherein the first position is located at the end of the first stub near the first break.

5. The terminal antenna according to claim 2 or 3, characterized in that, Also includes: The fourth feed point of the third antenna is connected to the third position of the first stub, and the third position is adjacent to the first position. A first capacitor, one end of which is connected to the fourth position of the first branch and the other end is grounded, wherein the fourth position is adjacent to the third position and is located on the side of the third position away from the first position.

6. The terminal antenna according to claim 5, characterized in that, Also includes: The first filtering module and the second filtering module, wherein... The first filtering module is connected in series between the first feed point and the radiator of the first antenna; The second filter module is connected in series between the fourth feed point and the first branch.

7. The terminal antenna according to claim 2, characterized in that, The first tuning module includes a second capacitor, an inductor, and a third capacitor, wherein the second capacitor is connected in parallel with the inductor and then connected in series with the third capacitor.

8. The terminal antenna according to any one of claims 1 to 4, 6 to 7, characterized in that, Also includes: The second tuning module; among which... One end of the second tuning module is connected to the fifth position of the second branch, and the other end is grounded. The fifth position is located between the first return point and the first break, and the distance between the fifth position and the first return point is greater than the distance between the fifth position and the first break.

9. The terminal antenna according to claim 8, characterized in that, Also includes: The third feed point and matching module of the fourth antenna; wherein, The third feed point is connected to the sixth position of the third branch through a matching module. The sixth position is located between the third return point and the second break, and the distance between the sixth position and the third return point is greater than the distance between the sixth position and the second break.

10. The terminal antenna according to claim 9, characterized in that, The matching module includes: a switching module, at least one first device, and at least one second device, wherein, One end of each of the first devices is connected to the switch module, and the other end is grounded; the first devices are connected in parallel. One end of each of the second devices is connected to the switch module, and the other end is connected to the third feed point; the second devices are connected in parallel. The switch module is used to connect the at least one second device and the third stub when the fourth antenna is working, and to connect the at least one first device and the third stub when the first antenna is working.

11. The terminal antenna according to any one of claims 1 to 4, 6 to 7, characterized in that, Also includes: The second inner radiator is connected to the first branch through a connection point. The second inner radiator extends from the connection point toward the first fracture and has a second gap with the first branch.

12. The terminal antenna according to claim 11, characterized in that, Also includes: The third tuning module has one end connected to the seventh position of the second inner radiator, wherein the seventh position is located at the end of the second inner radiator away from the connection point.

13. The terminal antenna according to any one of claims 1 to 4, 6 to 7, characterized in that, Also includes: A metal ring is disposed on the housing of the terminal, and the projection of the metal ring in the thickness direction of the terminal does not overlap with the outer radiator. A fourth return point is provided on the side of the metal ring away from the first branch.

14. A terminal device, characterized in that, include: The terminal antenna according to any one of claims 1 to 13.

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