Antenna assembly and mobile terminal

Abstract

This disclosure relates to an antenna assembly and a mobile terminal, belonging to the field of mobile communication technology. The antenna assembly includes a metal frame, a first antenna element, and a second antenna element. The metal frame includes a first frame, a second frame, and a third frame. The third frame includes a first radiating portion, a second radiating portion, and a slot. The first antenna element includes a feed point, a first resonant adjustment element, and a first connection point. The first resonant adjustment element is electrically connected between the feed point and the first connection point. The first connection point is disposed on the second radiating portion. The second antenna element includes a first loading point, a second resonant adjustment element, and a second connection point. The second resonant adjustment element is electrically connected between the first loading point and the second connection point. The second connection point is disposed on the first radiating portion. By loading the first radiating portion with the second antenna element, the current distribution of the antenna assembly is improved when the second radiating portion is operating, reducing the influence of hand grip and head movement.

Description

Technical Field

[0001] This disclosure relates to the field of mobile communication technology, and in particular to antenna components and mobile terminals. Background Technology

[0002] With the rapid development of mobile communications towards 5G, the trend in mobile phone antenna development is towards supporting more and more frequency bands, increasing the number of antennas, shrinking space, supporting more and more operators, and increasing the number of operator demands, with increasingly stringent standards. Furthermore, European and American operators have very high performance requirements for mobile phones in head-and-hand scenarios, which places high demands on the antenna design of traditional mobile phones sold in China.

[0003] To improve the head and hand performance of mobile phones, one current solution is to circumvent spatial limitations. This approach increases constraints on the industrial and structural design of mobile phones. This results in less-than-perfect overall design, severe homogenization, weak differentiation, and consequently, reduced product competitiveness.

[0004] Another current solution is multi-antenna switching. This solution not only increases the complexity of system design but also places higher demands on the performance of multiple antennas. This imposes more and higher requirements on antenna structure and environment, and inevitably affects the overall stacking and appearance of the device. Therefore, this ultimately leads to more constraints on product design, resulting in a decrease in product competitiveness.

[0005] Therefore, an improved antenna design is needed to enhance the antenna's head-and-hand performance. Summary of the Invention

[0006] To overcome the problems existing in related technologies, this disclosure provides an antenna assembly and a mobile terminal.

[0007] According to one aspect of an exemplary embodiment of the present disclosure, an antenna assembly is provided, the antenna assembly comprising: a metal frame including a first frame, a second frame, and a third frame connecting the first frame and the second frame, wherein the third frame includes a first radiating portion, a second radiating portion, and a gap located between the first radiating portion and the second radiating portion; a first antenna element including a feed point, a first resonant adjustment element, and a first connection point, wherein a first end of the first resonant adjustment element is electrically connected to the feed point, a second end of the first resonant adjustment element is electrically connected to the first connection point, and the first connection point is disposed on the second radiating portion; and a second antenna element including a first loading point, a second resonant adjustment element, and a second connection point, wherein a first end of the second resonant adjustment element is electrically connected to the first loading point, a second end of the second resonant adjustment element is electrically connected to the second connection point, and the second connection point is disposed on the first radiating portion.

[0008] In one embodiment, the antenna assembly further includes a third antenna element, comprising a second loading point, a third resonant adjustment element, and a third connection point, wherein a first end of the third resonant adjustment element is electrically connected to the second loading point, a second end of the third resonant adjustment element is electrically connected to the third connection point, and the third connection point is disposed at a position on the first radiating portion that is different from the second connection point.

[0009] In one embodiment, the distance between the third connection point and the first border is greater than the distance between the second connection point and the first border.

[0010] In one embodiment, the second connection point and the third connection point are located on either side of the midpoint of the third border.

[0011] In one embodiment, the second resonant adjustment element and the third resonant adjustment element respectively include a capacitor element, an inductor element, or a combination thereof.

[0012] In one embodiment, the second antenna element further includes a first connection switching element electrically connected in series with the second resonant adjustment element, and the third antenna element further includes a second connection switching element electrically connected in series with the third resonant adjustment element.

[0013] In one embodiment, the second resonant adjustment element includes a plurality of capacitors or inductors connected in parallel, and the first connection switching element is configured to switch the capacitors or inductors connected between the second connection point and the first loading point.

[0014] In one embodiment, the third resonant adjustment element includes a plurality of capacitors or inductors connected in parallel, and the second connection switching element is configured to switch the capacitors or inductors connected between the third connection point and the second loading point.

[0015] In one embodiment, the third resonant adjustment element comprises a single capacitor or inductor.

[0016] In one embodiment, the capacitor or the inductor is adjustable.

[0017] In one embodiment, the antenna assembly further includes a metal plate surrounded by the metal frame, wherein the first loading point and the second loading point are connected to the metal plate.

[0018] In one embodiment, the first border and the second border are the side borders of the metal border, and the third border is the bottom border of the metal border.

[0019] In one embodiment, the distance between the gap and the first frame is greater than the distance between the gap and the second frame.

[0020] In one embodiment, the length of the first radiating part is shorter than the length of the second radiating part, the first radiating part is configured to radiate antenna signals with a frequency range of 700MHz to 960MHz, and the second radiating part is configured to radiate antenna signals with a frequency range of 1700MHz to 2700MHz.

[0021] According to another exemplary embodiment of the present disclosure, a mobile terminal is provided, the mobile terminal including: an antenna assembly as described in any of the above embodiments.

[0022] The technical solutions provided by the exemplary embodiments of this disclosure may include the following beneficial technical effects:

[0023] According to the exemplary embodiments of the antenna assembly and mobile terminal disclosed herein, by utilizing a second antenna element to load the first radiating section, the current distribution of the antenna assembly during the operation of the second radiating section is improved, reducing the impact of hand grip and head movement. Even in positions that are more aesthetically pleasing and structurally sound but detrimental to the head-and-hand performance of the antenna assembly, better head-and-hand performance can be optimized, thereby better meeting the performance requirements of European and American operators for mobile phones in head-and-hand scenarios, without the need for complementary other antenna assemblies or special selection of antenna assembly positions. This increases the freedom of product design, facilitating more optimized product design and thus enhancing product differentiation and competitiveness.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate exemplary embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0026] Figure 1 This is a schematic diagram illustrating the structure of an antenna assembly according to an exemplary embodiment of the present disclosure.

[0027] Figure 2 This is a schematic diagram illustrating a second antenna element in an antenna assembly according to an exemplary embodiment of the present disclosure.

[0028] Figure 3A This is a schematic diagram illustrating a third antenna element in an antenna assembly according to an exemplary embodiment of the present disclosure.

[0029] Figure 3B This is a schematic diagram illustrating a third antenna element in an antenna assembly according to an exemplary embodiment of the present disclosure.

[0030] Figure 4A This is a schematic diagram illustrating a performance test of an antenna assembly in a left-hand grip state according to an exemplary embodiment of the present disclosure.

[0031] Figure 4B This is a schematic diagram illustrating a performance test of an antenna assembly in a right-hand grip state according to an exemplary embodiment of the present disclosure.

[0032] Figure 5 This is a schematic diagram illustrating an antenna assembly according to an exemplary embodiment of the present disclosure.

[0033] Figure 6A and Figure 6B It is a schematic diagram illustrating the distribution of intermediate frequency current and high frequency current after loading with a second antenna element according to an exemplary embodiment of the present disclosure.

[0034] Figure 7A and Figure 7B This is a schematic diagram illustrating the distribution of intermediate frequency current and high frequency current after loading using a second antenna element and a third antenna element according to exemplary embodiments of the present disclosure.

[0035] Figure 8A and Figure 8B These are simulation results diagrams used to illustrate the distribution of intermediate frequency current and high frequency current after loading using a second antenna element and a third antenna element according to exemplary embodiments of the present disclosure. Detailed Implementation

[0036] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the exemplary embodiments below do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the scope of the appended claims.

[0037] Before providing a detailed explanation of the exemplary embodiments of this disclosure, a brief introduction will be given to the terms and application scenarios involved in the exemplary embodiments of this disclosure.

[0038] First, let me briefly introduce some of the terms used in the exemplary embodiments of this disclosure. In the exemplary embodiments of this disclosure, low-frequency antenna signals generally refer to antenna signals with frequencies in the range of approximately 700MHz to 960MHz, intermediate-frequency antenna signals generally refer to antenna signals with frequencies in the range of approximately 1700MHz to 2170MHz, and high-frequency antenna signals generally refer to antenna signals with frequencies in the range of approximately 2300MHz to 2700MHz. Furthermore, in the exemplary embodiments of this disclosure, mid-to-high frequency antenna signals generally refer to antenna signals with frequencies in the range of approximately 1700MHz to 2700MHz.

[0039] Next, the application scenarios involved in the exemplary embodiments of this disclosure will be briefly introduced.

[0040] To improve the head-and-hand performance of mobile phones, one current solution is spatial avoidance. In this solution, the antenna is positioned as far away from the head and hands as possible, thus reducing the impact of the head and hands on the antenna. Specifically, in early mobile phone layouts, spatial avoidance involved strategically choosing the antenna's location to minimize the impact of holding the phone or bringing it close to the head. However, this solution increases limitations on the industrial and structural design of mobile phones. This leads to less-than-perfect overall design, severe homogenization, weak differentiation, and consequently, reduced product competitiveness.

[0041] Another solution is to employ multi-antenna switching. Specifically, switching methods include switching between the top and bottom antennas, or between the bottom and side antennas. Sensors detect when a hand is holding the device or a head is close, and software determines the signal strength and automatically switches to the antenna with the better signal. However, this solution not only increases the complexity of the system design but also places higher demands on the performance of multiple antennas. This imposes more stringent requirements on the antenna structure and environment, inevitably affecting the overall stacking and appearance of the device. Therefore, this ultimately leads to greater constraints on product design, reducing its competitiveness.

[0042] Therefore, exemplary embodiments of this disclosure provide an antenna assembly and a mobile terminal. The antenna assembly is applied to the mobile terminal. According to the exemplary embodiments of this disclosure, the antenna assembly and mobile terminal, by rationally controlling the current distribution of the antenna assembly, disperse concentrated current, thereby reducing the impact of hand grip and head on the antenna assembly. Even in positions that are more aesthetically pleasing and structurally sound but detrimental to the head-and-hand performance of the antenna assembly, better head-and-hand performance can be optimized, thus better meeting the performance requirements of European and American operators for mobile phones in head-and-hand scenarios, without the need for complementary antenna assemblies or special selection of the antenna assembly's location. Special selection of the antenna assembly's location may affect the overall appearance, layout, and structure of the mobile terminal. Therefore, the antenna assembly and mobile terminal according to the exemplary embodiments of this disclosure increase the freedom of product design, facilitating more optimized product design, and thereby enhancing product differentiation and competitiveness.

[0043] The antenna assembly and mobile terminal according to exemplary embodiments of this disclosure solve the technical problems in related technologies that rely on antenna switching with increased complexity and space, or on optimizing antenna positions to avoid head and hand movements, thereby limiting the overall stacking capability or causing a decline in product competitiveness. Specific implementations of the antenna assembly and mobile terminal according to exemplary embodiments of this disclosure are described in the exemplary embodiments below.

[0044] The antenna assembly provided by the exemplary embodiments of this disclosure can be applied to mobile terminals such as mobile phones, radios, tablet computers, etc. In the detailed description of the exemplary embodiments described below, only a mobile phone is used as an example, but the exemplary embodiments of this disclosure are not limited thereto.

[0045] Figure 1 This is a schematic diagram illustrating the structure of an antenna assembly according to an exemplary embodiment of the present disclosure.

[0046] Reference Figure 1 The image shows an antenna assembly 1000 according to an exemplary embodiment of the present disclosure. The antenna assembly 1000 includes a metal frame 100, a first antenna element 400, and a second antenna element 200.

[0047] In an exemplary embodiment of this disclosure, the metal frame 100 may include a first frame 120, a second frame 130, and a third frame 110 connecting the first frame 120 and the second frame 130.

[0048] In an exemplary embodiment of this disclosure, the third frame 110 may include a first radiating portion 110A, a second radiating portion 110B, and a gap 110S located between the first radiating portion 110A and the second radiating portion 110B. As shown, the gap 110S may be disposed between the first radiating portion 110A and the second radiating portion 110B. The gap 110S may be configured to isolate the first radiating portion 110A and the second radiating portion 110B. For example, the distance between the gap 110S and the first frame 120 may be greater than the distance between the gap 110S and the second frame 130.

[0049] In an exemplary embodiment of this disclosure, the first antenna element 400 may include a feed point 410, a first resonant adjustment element 420, and a first connection point 430. The first end of the first resonant adjustment element 420 (e.g., Figure 1 The end of the first resonant adjustment element 420 shown, away from the third frame 110, can be electrically connected to the feed point 410, and the second end of the first resonant adjustment element 420 (e.g., Figure 1 The end of the first resonant adjustment element 420 shown (near the third frame 110) can be electrically connected to the first connection point 430. For example, the first connection point 430 can be provided on the second radiating part 110B.

[0050] The feed point 410 of the first antenna element 400 can be used as an access point for a signal source. Specifically, the feed point 410 can be configured to transmit electrical signals provided by radio frequency front-end elements to the radiating structure, for example... Figure 1 The second radiating part 110B in the third frame 110 radiates the antenna signal under the excitation of the electrical signal. The feed current flowing out from the feed point 410 flows through the first connection point 430 and through the second radiating part 110B of the third frame 110.

[0051] In some exemplary embodiments, to improve the radiation efficiency of the antenna assembly 1000, a first resonant adjustment element 420 (i.e., a matching circuit) may be provided between the feed point 410 and the first connection point 430. Specifically, the first resonant adjustment element 420 may include an impedance tuner and / or an aperture tuner. For example, the impedance tuner may dynamically adjust the internal impedance of the antenna assembly 1000 to reduce and / or minimize the antenna signal reflected from the antenna assembly 1000. For example, the aperture tuner may be configured to adjust the resonant frequency or impedance of the antenna assembly 1000 according to a tuning value.

[0052] In an exemplary embodiment of this disclosure, the second antenna element 200 may include a first loading point 210, a second resonant adjustment element 220, and a second connection point 230. The first end of the second resonant adjustment element 220 (e.g., Figure 1 The end of the second resonant adjustment element 220 shown (away from the third frame 110) can be electrically connected to the first loading point 210, and the second end of the second resonant adjustment element 220 (e.g., Figure 1 The end of the second resonant adjustment element 220 shown (near the third frame 110) can be electrically connected to the second connection point 230. For example, the second connection point 230 can be provided on the first radiating part 110A.

[0053] Continue to refer to Figure 1 In an exemplary embodiment of this disclosure, the antenna assembly 1000 may further include a third antenna element 300.

[0054] In an exemplary embodiment of this disclosure, the third antenna element 300 may include a second loading point 310, a third resonant adjustment element 320, and a third connection point 330. The first end of the third resonant adjustment element 320 (e.g., Figure 1 The end of the third resonant adjustment element 320 shown, away from the third frame 110, can be electrically connected to the second loading point 310, and the second end of the third resonant adjustment element 320 (e.g., Figure 1 The end of the third resonant adjustment element 320 shown (near the third frame 110) can be electrically connected to the third connection point 330. The third connection point 330 can be disposed on the first radiating portion 110A. For example, the distance between the third connection point 330 and the first frame 120 can be greater than the distance between the second connection point 230 and the first frame 120. That is, both the second connection point 230 and the third connection point 330 are disposed on the first radiating portion 110A, but the position of the third connection point 330 on the first radiating portion 110A is closer to the gap 110S than the second connection point 230.

[0055] In an exemplary embodiment of this disclosure, the second connection point 230 and the third connection point 330 may be located on either side of the midpoint of the third border 110. For example, in Figure 1In the exemplary embodiment shown, the midpoint of the third frame 110 refers to the intersection of the centerline 140 of the metal frame 100 and the third frame 110. When the antenna assembly 1000 is applied to a mobile phone such as a smartphone, the metal frame 100 described above is typically a frame included in the middle frame of the mobile phone. In this case, other electronic components, such as a USB interface or microphone, are typically also provided at or near the midpoint of the third frame 110. When an electronic component such as a USB interface is provided at the midpoint of the third frame 110, the second connection point 230 and the third connection point 330 can be provided close to the electronic component. The second connection point 230 can be provided between the electronic component and the first frame 120 and close to the electronic component. The third connection point 330 can be provided between the electronic component and the second frame 130 and close to the electronic component. More specifically, the third connection point 330 can be provided between the electronic component and the open end of the first radiating portion 110A facing the slot 110S and close to the electronic component.

[0056] In an exemplary embodiment of this disclosure, the antenna assembly 1000 may further include a metal plate (not shown) surrounded by a metal frame 100. A first loading point 210 and a second loading point 310 may be connected to the metal plate. When the antenna assembly 1000 is applied to a mobile phone, such as a smartphone, the metal plate described above is typically a metal plate included in the mid-frame of the mobile phone. In this case, the second antenna element 200 can be grounded through the first loading point 210, and the third antenna element 300 can be grounded through the second loading point 310. It should be noted that the first loading point 210 may typically be located near the second connection point 230, and the second loading point 310 may typically be located near the third connection point 330. For example, refer to... Figure 1 The distance between the first loading point 210 and the center line 140 can generally be equal to the distance between the second connection point 230 and the center line 140, and the distance between the second loading point 310 and the center line 140 can generally be equal to the distance between the third connection point 330 and the center line 140, but the exemplary embodiments of this disclosure are not limited thereto.

[0057] In an exemplary embodiment of this disclosure, the length of the first radiating part 110A may be less than the length of the second radiating part 110B. The first radiating part 110A may be configured to radiate low-frequency antenna signals, and the second radiating part 110B may be configured to radiate mid-to-high-frequency antenna signals. For example, the first radiating part 110A may be configured to radiate antenna signals with a frequency range of 700MHz to 960MHz, and the second radiating part 110B may be configured to radiate antenna signals with a frequency range of 1700MHz to 2700MHz.

[0058] In exemplary embodiments of this disclosure, the second resonant adjustment element 220 and the third resonant adjustment element 320 may respectively include a capacitor element, an inductor element, or a combination thereof.

[0059] In conjunction with the above Figure 1 In the described exemplary embodiment, the first border 120 and the second border 130 are two opposing side borders of the metal border 100, and the third border 110 is the bottom border of the two opposing side borders of the metal border 100. Specifically, the third border 110 is located at the bottom of the metal border 100 and has a single gap 110S. It should be noted that the inventive concept of this disclosure is not limited to the case of a bottom border. For example, in other embodiments, the third border 110 may be a border other than the bottom border of the metal border 100, such as a top border or a side border.

[0060] In the detailed description described below, the following will be combined with Figure 2 A second antenna element 200 is described according to an exemplary embodiment of the present disclosure.

[0061] Figure 2 This is a schematic diagram illustrating a second antenna element in an antenna assembly according to an exemplary embodiment of the present disclosure.

[0062] Reference Figure 2 The image shows a second antenna element 200 according to an exemplary embodiment of the present disclosure.

[0063] In an exemplary embodiment of this disclosure, the second antenna element 200 may include a first loading point 210, a second resonant adjustment element 220, and a second connection point 230. The second antenna element 200 can be grounded through the first loading point 210 and electrically connected to the first radiating portion 110A through the second connection point 230. The second resonant adjustment element 220 may include a capacitor element, an inductor element, or a combination thereof. Specifically, the second resonant adjustment element 220 may include a plurality of (e.g., two or more) capacitor elements or inductor elements electrically connected in parallel. The second antenna element 200 may also include a first connection switching element 240 electrically connected in series with the second resonant adjustment element 220. The first connection switching element 240 is configured to switch the capacitor element or inductor element connected between the second connection point 230 and the first loading point 210. Accordingly, the first connection switching element 240 may be a single-pole N-throw switch, where N is a natural number equal to the number of capacitor elements and inductor elements electrically connected in parallel.

[0064] exist Figure 2In the exemplary embodiment shown, the second resonant adjustment element 220 may include a plurality of capacitors or inductors connected in parallel, for example, two capacitors and one inductor. A first connection switching element 240 may be disposed between the second connection point 230 and the second resonant adjustment element 220. It should be noted that the first connection switching element 240 may also be disposed between the second resonant adjustment element 220 and the first loading point 210. The first connection switching element 240 may be configured to connect one of the two capacitors and one inductor between the second connection point 230 and the first loading point 210. In this case, the first connection switching element 240 may be a single-pole three-throw switch.

[0065] In the detailed description described below, the following will be combined with Figure 3A and Figure 3B A third antenna element 300 is described according to an exemplary embodiment of the present disclosure.

[0066] Figure 3A This is a schematic diagram illustrating a third antenna element in an antenna assembly according to an exemplary embodiment of the present disclosure.

[0067] Reference Figure 3A The diagram illustrates a third antenna element 300 according to an exemplary embodiment of the present disclosure.

[0068] In an exemplary embodiment of this disclosure, the third antenna element 300 may include a second loading point 310, a third resonant adjustment element 320A, and a third connection point 330. The third antenna element 300 can be grounded through the second loading point 310 and electrically connected to the first radiating portion 110A through the third connection point 330. The third resonant adjustment element 320A may include an adjustable capacitor element, an adjustable inductor element, or a combination thereof. For example, such as Figure 3A As shown, the third resonant adjustment element 320A may include a single adjustable capacitor element. Since the third resonant adjustment element 320A contains an adjustable capacitor element or an inductor element, the current distribution of the antenna assembly can be adjusted by regulating the parameters of the adjustable capacitor element or inductor element.

[0069] although Figure 3A The third resonant adjustment element 320A is shown to include an adjustable capacitor or inductor element; however, it should be noted that, compared with... Figure 2 Similar to the second resonant adjustment element 220 of the second antenna element 200 shown, the third resonant adjustment element 320A may also include multiple (e.g., two or more) capacitor elements or inductor elements connected in parallel, and correspondingly the second connection switching element 340 may be a single-pole N-throw switch, where N is a natural number equal to the number of capacitor elements and inductor elements connected in parallel.

[0070] Figure 3B This is a schematic diagram illustrating a third antenna element in an antenna assembly according to an exemplary embodiment of the present disclosure.

[0071] Reference Figure 3B This illustrates a third antenna element 300 according to an exemplary embodiment of the present disclosure. Figure 3A The exemplary embodiment shown differs in that the third resonant adjustment element 320B of the third antenna element 300 may include a single capacitor or inductor element with fixed parameters. For example, the parameters of the capacitor or inductor element are determined through simulation, such that the antenna assembly provides a desired current distribution.

[0072] In the following text, we will combine Figure 4A and Figure 4B A schematic diagram briefly illustrating the head and hand performance test of an antenna assembly according to an exemplary embodiment of the present disclosure.

[0073] Figure 4A This is a schematic diagram illustrating a performance test of an antenna assembly in a left-hand grip state according to an exemplary embodiment of the present disclosure, and Figure 4B This is a schematic diagram illustrating a performance test of an antenna assembly in a right-hand grip state according to an exemplary embodiment of the present disclosure.

[0074] Reference Figure 4A The diagram illustrates the BHHL performance test of antenna assembly 1000. BHHL refers to the Beside Head and Hand Left Side (BHHL) configuration, which is the antenna performance of a mobile phone when held with the head and left hand (Wide Hand) as specified by the Cellular Telecommunication Industry Association (CITA) in the United States.

[0075] Reference Figure 4B The diagram illustrates the BHHR performance test of antenna assembly 1000. BHHR refers to the right-hand grip (Beside Head and Hand Right Side), which is the antenna performance of the mobile phone when held with the head and right hand (wide hand) as specified by CITA.

[0076] In addition to BHHL and BHHR performance tests, FS performance tests (not shown) were also performed on antenna assembly 1000. FS refers to Free Space, that is, the antenna performance when the mobile phone is over-the-air (OTA).

[0077] by Figure 2 and Figure 3B Taking the second antenna element 200 and the third antenna element 300 as examples, typical results of performance testing of the antenna assembly 1000 according to an exemplary embodiment of the present disclosure are given. By appropriately selecting the capacitor element, inductor element, or combination thereof included in the second resonant adjustment element 220 and the third resonant adjustment element 320, the first radiating portion 110A can be loaded, making the phase of the current in the antenna assembly 1000 consistent, thereby lengthening the effective current path. For example, Figure 2 The second resonant adjustment element 220 includes two capacitors and one inductor connected in parallel. The capacitances of the two capacitors are 2.2 pF and 3.5 pF, respectively, and the inductance of the inductor is 20 nH. Furthermore, Figure 3B The third resonant adjustment element 320B includes a single capacitor element with fixed parameters, and the capacitance value of the capacitor element is 3pF. Given the parameter values ​​of the capacitor element and the inductor element described above, Figure 1 The first radiating element 110A shown is loaded onto the first loading point 210 and the second loading point 310 via the second antenna element 200 and the third antenna element 300. Typical results of performance testing are shown in Table 1 below.

[0078] Table 1:

[0079]

[0080] In Table 1, the difference between the BHHL performance test results and the FS performance test results, as well as the difference between the BHHR performance test results and the FS performance test results, represent the head-to-hand drop.

[0081] As can be seen from Table 1 above, by loading the first radiating element 110A onto the first loading point 210 and the second loading point 310 using the second antenna element 200 and the third antenna element 300, the reduction in both intermediate frequency (IF) and high frequency (HF) head-to-hand ratios is significant. For the IF antenna signal, the BHHL-FS decreased by 1.7 dB after loading, and the BHHR-FS decreased by 0.7 dB. On average, the IF head-to-hand ratio reduction was approximately 1.2 dB. For the HF antenna signal, the BHHL-FS decreased by 1.1 dB after loading, and the BHHR-FS decreased by 1 dB. On average, the IF head-to-hand ratio reduction was approximately 1.05 dB. It should be noted that the component types and parameter values ​​of the second resonant adjustment element 220 and the third resonant adjustment element 320 described above are merely examples, and this disclosure is not limited thereto.

[0082] In the detailed description described below, the following will be combined with Figure 5 , Figure 6A and Figure 6B , Figure 7Aand Figure 7B , Figure 8A and Figure 8B Describe the current distribution of an antenna assembly 1000 according to an exemplary embodiment of the present disclosure.

[0083] Figure 5 This is a schematic diagram illustrating an antenna assembly according to an exemplary embodiment of the present disclosure.

[0084] Reference Figure 5 The diagram shows an antenna assembly 1000 according to an exemplary embodiment of the present disclosure. Figure 5 The antenna assembly 1000 shown basically corresponds to Figure 1 The antenna assembly 1000 is shown. For example, when the antenna assembly 1000 is applied to a mobile phone such as a smartphone, Figure 5 A rear view (or back view) of the mobile phone including the antenna assembly 1000 can also be shown accordingly.

[0085] Figure 6A This is a schematic diagram illustrating the distribution of intermediate frequency current after loading with a second antenna element according to an exemplary embodiment of the present disclosure, and Figure 6B This is a schematic diagram illustrating the distribution of high-frequency current after loading with a second antenna element according to an exemplary embodiment of the present disclosure.

[0086] When the first radiating section 110A is applied to the first application point 210 using the second radiating element 200, an additional resonance is introduced compared to before the application, resulting in a longer effective path for the current after the application. For example, Figure 6A Arrow 710 schematically illustrates the contribution of the load to the effective path of the intermediate frequency current, and Figure 6B Arrow 720 schematically illustrates the contribution of loading to the effective path of the high-frequency current. The arrow direction indicates the direction of the current distribution, and the arrow length indicates the effective path length of the current. Compared to before loading, the effective path of the current after loading is longer in the direction from the first radiator 110A to the second radiator 110B. This makes the current distribution of the antenna assembly 1000 more dispersed when the second radiator 110B is operating, thus helping to reduce the effects of hand grip and head movement. It should be noted that, due to its dependence on the operating frequency, the effective path of the intermediate frequency current, indicated by arrow 710, is longer than the effective path of the high-frequency current, indicated by arrow 720.

[0087] Figure 7A This is a schematic diagram illustrating the distribution of intermediate frequency current after loading using a second antenna element and a third antenna element according to exemplary embodiments of the present disclosure, and Figure 7B This is a schematic diagram illustrating the distribution of high-frequency current after loading using a second antenna element and a third antenna element according to an exemplary embodiment of the present disclosure.

[0088] exist Figure 7A and Figure 7B In the illustrated embodiment, the first radiating element 110A is loaded onto the first loading point 210 and the second loading point 310 via the second antenna element 200 and the third antenna element 300, respectively. In short, with... Figure 6A and Figure 6B The difference in the illustrated embodiment is that, Figure 7A and Figure 7B In the illustrated embodiment, the first radiating section 110A is also loaded onto the second loading point 310 using a third antenna element 300. Figure 6A and Figure 6B similar, Figure 7A Arrow 730 schematically illustrates the contribution of the first radiator 110A to the effective path of the intermediate frequency current by the third antenna element 300, and Figure 7B Arrow 740 in the diagram schematically illustrates the contribution of the load to the effective path of the high-frequency current.

[0089] Figure 8A This is a simulation result diagram illustrating the intermediate frequency current distribution after loading using a second antenna element and a third antenna element according to an exemplary embodiment of the present disclosure, and Figure 8B This is a simulation result diagram used to illustrate the high-frequency current distribution after loading using a second antenna element and a third antenna element according to an exemplary embodiment of the present disclosure.

[0090] Reference Figure 8A The diagram shows a simulation result of the current distribution of the antenna assembly 1000 after being loaded at an intermediate frequency of 1950 MHz according to an exemplary embodiment of the present disclosure. (Refer to...) Figure 8B The diagram shows simulation results of the current distribution of the antenna assembly 1000 after high-frequency loading at 2700MHz according to an exemplary embodiment of the present disclosure. Figure 8A and Figure 8B As shown, by using the second antenna element 200 and the third antenna element 300 to load the first radiating part 110A onto the first loading point 210 and the second loading point 310, the current distribution on the third frame 110 is improved relative to the intermediate frequency antenna signal and the high frequency antenna signal. Since the current distribution is wider, it is less affected by the head and hand, thereby improving the head and hand performance of the antenna assembly 1000.

[0091] This disclosure relates to an antenna assembly, comprising: a metal frame, a first antenna element, and a second antenna element. The metal frame includes a first frame, a second frame, and a third frame. The third frame includes a first radiating portion, a second radiating portion, and a slot. The first antenna element includes a feed point, a first resonant adjustment element, and a first connection point. The first resonant adjustment element is electrically connected between the feed point and the first connection point. The first connection point is disposed on the second radiating portion. The second antenna element includes a first loading point, a second resonant adjustment element, and a second connection point. The second resonant adjustment element is electrically connected between the first loading point and the second connection point. The second connection point is disposed on the first radiating portion. This disclosure also relates to a mobile terminal including the antenna assembly described above. According to this disclosure, by loading the first radiating portion with the second antenna element, the current distribution of the antenna assembly is improved when the second radiating portion is operating, reducing the influence of hand grip and head movement.

[0092] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0093] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An antenna assembly, characterized in that, The antenna assembly includes: A metal frame includes a first frame, a second frame, and a third frame connecting the first frame and the second frame, wherein the third frame includes a first radiating portion, a second radiating portion, and a gap located between the first radiating portion and the second radiating portion. A first antenna element includes a feed point, a first resonant adjustment element, and a first connection point, wherein a first end of the first resonant adjustment element is electrically connected to the feed point, a second end of the first resonant adjustment element is electrically connected to the first connection point, and the first connection point is disposed on the second radiating portion; and The second antenna element includes a first loading point, a second resonant adjustment element, and a second connection point, wherein a first end of the second resonant adjustment element is electrically connected to the first loading point, a second end of the second resonant adjustment element is electrically connected to the second connection point, and the second connection point is disposed on the first radiating part. The third antenna element includes a second loading point, a third resonant adjustment element, and a third connection point, wherein a first end of the third resonant adjustment element is electrically connected to the second loading point, a second end of the third resonant adjustment element is electrically connected to the third connection point, and the third connection point is disposed on the first radiating part; The first radiating element is loaded onto the first loading point and the second loading point using the second antenna element and the third antenna element. By selecting the capacitor element, inductor element or combination thereof included in the second resonant adjustment element and the third resonant adjustment element, the first radiating element is loaded so that the phase of the current of the antenna assembly is consistent, thereby extending the effective path of the current and reducing the IF head-to-hand drop and the HF head-to-hand drop.

2. The antenna assembly according to claim 1, characterized in that, The third connection point is located at a different position from the second connection point in the first radiating part.

3. The antenna assembly according to claim 2, characterized in that, The distance between the third connection point and the first border is greater than the distance between the second connection point and the first border.

4. The antenna assembly according to claim 3, characterized in that, The second connection point and the third connection point are located on either side of the midpoint of the third border.

5. The antenna assembly according to claim 2, characterized in that, The second antenna element further includes a first connection switching element electrically connected in series with the second resonant adjustment element, and The third antenna element also includes a second connection switching element that is electrically connected in series with the third resonant adjustment element.

6. The antenna assembly according to claim 5, characterized in that, The second resonant adjustment element includes a plurality of capacitors or inductors connected in parallel, and the first connection switching element is configured to switch the capacitors or inductors connected between the second connection point and the first loading point.

7. The antenna assembly according to claim 6, characterized in that, The third resonant adjustment element includes a plurality of capacitors or inductors connected in parallel, and the second connection switching element is configured to switch the capacitors or inductors connected between the third connection point and the second loading point.

8. The antenna assembly according to claim 6, characterized in that, The third resonant adjustment element includes a single capacitor or inductor.

9. The antenna assembly according to claim 8, characterized in that, The capacitor or the inductor is adjustable.

10. The antenna assembly according to any one of claims 1-9, characterized in that, The first border and the second border are the side borders of the metal frame, and the third border is the bottom border of the metal frame.

11. The antenna assembly according to any one of claims 1-9, characterized in that, The distance between the gap and the first frame is greater than the distance between the gap and the second frame.

12. The antenna assembly according to claim 11, characterized in that, The length of the first radiating part is less than the length of the second radiating part. The first radiating element is configured to radiate antenna signals in the frequency range of 700MHz to 960MHz, and The second radiating element is configured to radiate antenna signals in the frequency range of 1700MHz to 2700MHz.

13. A mobile terminal, characterized in that, The mobile terminal includes: an antenna assembly as described in any one of claims 1-12.

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