MDA antenna structure and electronic equipment

Abstract

The utility model discloses an MDA antenna structure and an electronic device. The MDA antenna structure comprises a frame and an antenna radiator. The antenna radiator is arranged in the frame, and the antenna radiator comprises at least two metal branch sections; a slit is formed between the two metal branch sections, and the ends, close to each other, of the two metal branch sections are provided with a first sinking part and a second sinking part which are sunken in the direction away from the screen respectively. According to the utility model, the first sinking part and the second sinking part which are recessed along the direction far away from the screen are respectively arranged at the ends, close to each other, of the two metal branch sections, so that the contact area with the metal branch sections can be correspondingly reduced when a human body holds the metal branch sections, the capacitance coupling interference is further reduced from the physical level, and the cost is reduced on the premise of keeping the single-antenna design. The function of effectively reducing the coupling strength of the metal branch section and the human body tissue fluid in the holding state is achieved, and the purpose of improving the performance of the antenna in the head-hand state to improve the communication experience of a user is achieved.

Description

Technical Field

[0001] This utility model relates to the field of electronic communication equipment, and in particular to an MDA antenna structure and electronic equipment. Background Technology

[0002] With the rapid development of mobile communication technology, the antenna design of consumer electronic devices (such as smartphones) is facing increasingly stringent challenges. On the one hand, users' pursuit of thinner and lighter devices and all-metal appearances is constantly increasing, which has significantly reduced the available space for antennas; on the other hand, 5G communication technology has placed higher demands on the multi-band coverage and high radiation efficiency of antennas.

[0003] In existing technologies, MDA (In-Mold Molded Metal) antenna solutions retain the metallic feel while reducing costs by embedding a metal structure within the injection-molded frame. However, the slot in an MDA antenna is typically located on the side of the device, and there is a large parallel coupling area (i.e., slot area 301) between the metal segments 201 at both ends. Consequently, when a user holds the device, their fingers cover this slot area 301, causing strong capacitive coupling between the metal segment 201 and the human tissue fluid (a high dielectric constant medium), which in turn leads to a shift in the antenna resonant frequency and a reduction in radiation efficiency.

[0004] Currently, the common industry solution is to adjust the position of the slotted area 301 to the waist area of ​​the device, attempting to reduce the contact area between the human body and the metal support segment 201 when gripping it, thereby avoiding the aforementioned situation. However, this solution has certain drawbacks: for example, forming the slotted area 301 in the waist area of ​​the device weakens the structural strength of the device, and at the same time, at least two antennas are required to realize the cellular network function, which increases the overall cost of the device, and it cannot fundamentally solve the problem of strong coupling between the metal support segment 201 and human tissue fluid.

[0005] Therefore, an MDA antenna structure and electronic device are needed to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide an MDA antenna structure and electronic device that, while maintaining a single antenna design, effectively reduces the coupling strength between the metal segment and the human body fluid in the hand-held state, thereby improving antenna performance in the head-and-hand state and enhancing the user's communication experience.

[0007] To solve the above-mentioned technical problems, this utility model provides an MDA antenna structure, including a frame and an antenna radiator;

[0008] The antenna radiator is disposed inside the frame, and the antenna radiator includes at least two metal segments;

[0009] The two metal segments are provided with a slit between them, and each of the ends close to each other is provided with a first sunken part and a second sunken part recessed in a direction away from the screen.

[0010] Further, the first sunken part and the second sunken part are both in a stepped structure.

[0011] Further, the horizontal length of the first sunken part is 3.0-5.0 mm.

[0012] Further, the horizontal length of the second sunken part is 2.5-4.0 mm.

[0013] Further, the maximum distance between the first sunken part and the second sunken part and the screen is 2.5-3.5 mm.

[0014] Further, the parallel coupling width of the first sunken part and the second sunken part is 1.5-3.0 mm.

[0015] Further, each of the ends close to each other of the first sunken part and the second sunken part is provided with a chamfer.

[0016] Further, the width of the slit is 1.0-1.5 mm.

[0017] Further, the frame and the antenna radiator are integrally formed by in-mold injection.

[0018] In another aspect, the utility model also provides an electronic equipment which comprises the MDA antenna structure in the above embodiment.

[0019] Compared with the prior art, the utility model has at least the following beneficial effects:

[0020] By arranging the first sunken part and the second sunken part recessed in a direction away from the screen at the ends close to each other of the two metal segments, the contact area of the human body with the metal segments when holding the metal segments is reduced, the capacitive coupling interference is reduced from the physical level, the coupling strength of the metal segments and the human body tissue fluid in the holding state is effectively reduced under the premise of maintaining the single antenna design, the performance of the antenna in the head-hand state is improved, and the purpose of improving the user communication experience is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Fig. 1 is a partial structure schematic view of an MDA antenna structure in the prior art, and Fig. 2 is a partial structure schematic view of an MDA antenna structure in an embodiment of the utility model.

[0022] Figure 2 Fig. 1 is a partial structure schematic view of an MDA antenna structure in the prior art, and Fig. 2 is a partial structure schematic view of an MDA antenna structure in an embodiment of the utility model.

[0023] Figure 3 Figure 1 is a partial structure diagram of an antenna radiator in an MDA antenna structure according to an embodiment of the present application

[0024] Figure 4 Figure 2 is a partial structure diagram between the antenna radiator and the screen in the MDA antenna structure according to an embodiment of the present application.

[0025] Reference signs: 1, frame; 2, metal branch; 21, first sunken part; 22, second sunken part; 3, slit; 4, screen. DETAILED DESCRIPTION

[0026] The MDA antenna structure and the electronic device according to the present application will be described in more detail below with reference to the accompanying drawings, in which the preferred embodiments of the present application are shown, it should be understood that those skilled in the art can modify the present application described herein while still achieving the advantageous effects of the present application. Therefore, the following description should be understood as a broad knowledge for those skilled in the art, rather than as a limitation of the present application.

[0027] The present application will be described in more detail in the following paragraphs with reference to the accompanying drawings. The advantages and features of the present application will be more apparent according to the following description. It should be noted that the drawings are very simplified and use non-precise proportions, only to facilitate, clearly assist the purpose of illustrating the embodiments of the present application.

[0028] Embodiment one

[0029] As shown in the drawings, the present application embodiment proposes an MDA antenna structure, comprising a frame 1 and an antenna radiator. Figures 2 to 4 Among them, the antenna radiator is arranged inside the frame 1, and the antenna radiator comprises at least two metal branches 2.

[0030] The slit 3 between the two metal branches 2 makes the antenna produce current resonance at a specific frequency. When the external electromagnetic wave excites the antenna, the electric field and the magnetic field at the slit 3 interact with each other, prompting the current to form a specific oscillation mode in the two metal branches 2. This resonance characteristic enables the antenna to efficiently receive and transmit signals at a specific frequency band, improving the response ability of the antenna to the target frequency band signal.

[0031]

[0032] ​It should be noted that the two metal branches 2 are respectively provided with a first sunken part 21 and a second sunken part 22 at the end close to each other, which are recessed in the direction away from the screen 4. Since the dielectric constant of the human body is high, when the user holds the device, the electromagnetic environment around the antenna will be changed, which will affect the current distribution. Therefore, the first sunken part 21 and the second sunken part 22 are arranged to reduce the contact area between the human body and the metal branch 2 when the human body holds the device, so as to avoid the current from leaking into the human body due to the holding of the human body, ensure that the current mainly flows in the metal branch 2, improve the performance of the antenna in the head-hand state, and improve the user's communication experience.

[0033] The device can correspondingly reduce the contact area between the human body and the metal branch 2 when the human body holds the device by arranging the two metal branches 2 to be respectively provided with a first sunken part 21 and a second sunken part 22 at the end close to each other, which are recessed in the direction away from the screen 4. Thus, the capacitive coupling interference is reduced from the physical layer, and the function of effectively reducing the coupling strength between the metal branch 2 and the human tissue fluid in the holding state is realized under the premise of maintaining the single-antenna design, so as to improve the performance of the antenna in the head-hand state, and improve the user's communication experience.

[0034] In the embodiment, the first sunken part 21 and the second sunken part 22 are both in a stepped structure. Compared with the ordinary recessed structure, the stepped structure can further reduce the contact area between the human body and the metal branch 2 in the holding state of the human body, and accordingly, the coupling strength between the metal branch 2 and the human tissue fluid can be further reduced, so as to ensure the stable transmission of the signal.

[0035] The horizontal length of the first sunken part 21 is 3.0mm-5.0mm, and preferably 4.22mm. The horizontal length of the second sunken part 22 is 2.5mm-4.0mm, and preferably 3.23mm.

[0036] The maximum distance between the first sunken part 21 and the second sunken part 22 and the screen 4 is 2.5mm-3.5mm, and preferably 2.82mm.

[0037] The parallel coupling width of the first sunken part 21 and the second sunken part 22 is 1.5mm-3.0mm, and preferably 2.04mm.

[0038] In addition, the width of the slit 3 is 1.0mm-1.5mm, and preferably 1.2mm. The width of 1.2mm can ensure effective oscillation of the current, avoid excessive radiation energy leakage caused by too wide slit 3, and avoid excessive current loss caused by too narrow slit 3. The width of 1.2mm optimizes the radiation efficiency, so that the antenna can more effectively convert electrical energy into electromagnetic wave radiation, and improve the signal strength and coverage.

[0039] The first sunken part 21 and the second sunken part 22 are provided with chamfers at the ends close to each other, since the sharp edges of the metal structure are easy to cause electric field concentration phenomenon, and the electric field concentration can cause energy loss increase, affecting the radiation efficiency of the antenna. The chamfer can smooth the electric field distribution, effectively reduce the concentration degree of the electric field at the edge of the sunken part. The current distribution on the metal branch 2 is more uniform, the energy loss is reduced, and thus the radiation efficiency and signal transmission quality of the antenna are improved.

[0040] In the embodiment, the frame 1 and the antenna radiator are integrally formed by in-mold injection.

[0041] Embodiment two

[0042] The embodiment two further proposes an electronic device on the basis of the embodiment one, which comprises the MDA antenna structure in the embodiment one, can correspondingly reduce the contact area of the human body when holding with the metal branch 2, and then reduce the capacitive coupling interference from the physical layer, realizes the function of effectively reducing the coupling strength of the metal branch 2 and the human tissue fluid in the holding state on the premise of maintaining the single antenna design, improves the performance of the antenna in the head and hand state, and improves the user communication experience.

[0043] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application belong to the scope of the claims of the present application and the equivalent technologies thereof, the present application also intends to include these modifications and variations.

Claims

1. An MDA antenna structure, characterized by, The frame and the antenna radiator are included; The antenna radiator is arranged inside the frame, and the antenna radiator includes at least two metal branches; A slit is formed between the two metal branches, and each end close to each other has a first sunken part and a second sunken part recessed away from the screen.

2. The MDA antenna structure of claim 1, wherein, The first sunken part and the second sunken part are both in a stepped structure.

3. The MDA antenna structure of claim 1, wherein, The horizontal length of the first sunken part is 3.0mm-5.0mm.

4. The MDA antenna structure of claim 1, wherein, The horizontal length of the second sunken part is 2.5mm-4.0mm.

5. The MDA antenna structure of claim 1, wherein, The maximum distance between the first sunken part, the second sunken part and the screen is 2.5mm-3.5mm.

6. The MDA antenna structure of claim 1, wherein, The parallel coupling width of the first sunken part and the second sunken part is 1.5mm-3.0mm.

7. The MDA antenna structure of claim 1, wherein, Each end close to each other of the first sunken part and the second sunken part is provided with a chamfer.

8. The MDA antenna structure of claim 1, wherein, The width of the slit is 1.0mm-1.5mm.

9. The MDA antenna structure of claim 1, wherein, The frame and the antenna radiator are integrally formed by in-mold injection.

10. An electronic device, comprising: The MDA antenna structure as claimed in any one of claims 1-9 is included.

Images