Dual-frequency antenna structure applied to smart watch with metal bezel

Abstract

The utility model discloses a double-frequency antenna structure applied to an intelligent watch with a metal watch bezel, which comprises the metal watch bezel, a plastic shell, a monopole antenna and a mainboard, and is characterized in that the plastic shell is positioned below the metal watch bezel and is in a ring frame shape; the monopole antenna is arranged on the inner wall of the plastic shell and is coupled with the metal bezel; and the main board is in feed connection with the monopole antenna. The dual-frequency antenna applied to the smart watch with the metal watch bezel is novel in structure, can meet the high-performance index requirement of a GPS / WiFi dual-frequency antenna, is in a monopole form, is simple in structure, can be produced through a laser etching technology, does not need to load an additional matching circuit at the feed end of the monopole antenna, and is convenient to use. The antenna performance loss is reduced while low cost and easy processing are ensured.

Description

Technical Field

[0001] This utility model relates to the field of smartwatch technology, and in particular to a dual-band antenna structure for use in smartwatches with metal bezels. Background Technology

[0002] With the development and upgrades of smartwatches, significant progress has been made in health monitoring, activity tracking, and intelligent interaction. In terms of appearance, they are gradually becoming thinner and more refined, with materials shifting from plastic to high-end materials such as metal. When metal is used for the watch bezel, it can integrate antennas, ensuring aesthetics while also improving the transmission and reception performance of wireless signals such as GPS, WiFi, and Bluetooth.

[0003] However, when an integrated metal bezel is used as an antenna structure, it can interfere with signals in certain frequency bands, affecting the antenna's performance. Therefore, a well-designed and easily implemented antenna design is needed to reduce such interference. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a dual-band antenna structure for smartwatches with metal bezels, which has good performance and low manufacturing cost.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a dual-band antenna structure applied to a smartwatch with a metal bezel, comprising:

[0006] Metal bezel;

[0007] A plastic housing, located below the metal bezel, the plastic housing being ring-shaped;

[0008] A monopole antenna is disposed on the inner wall of the plastic housing and coupled to the metal bezel;

[0009] The motherboard is fed to the monopole antenna.

[0010] In one embodiment, the monopole antenna is an LDS antenna.

[0011] In one embodiment, the plastic outer shell and the metal bezel are both annular.

[0012] In one embodiment, the monopole antenna includes a connected arcuate portion and a vertical portion, the end of the vertical portion away from the arcuate portion being fed to the main board, and a gap between the arcuate portion and the metal bezel.

[0013] In one embodiment, at least one end of the arc portion has an extension branch, the width of which is greater than or less than the width of the arc portion.

[0014] In one embodiment, the connection between the vertical portion and the arcuate portion is offset from the center of the arcuate portion.

[0015] The beneficial effects of this utility model are as follows: The dual-band antenna structure applied to smartwatches with metal bezels is novel, which can meet the high-performance requirements of GPS / WiFi dual-band antennas. Moreover, the antenna is a monopole, which is simple in structure and can be produced by laser engraving technology. Furthermore, the feed end of the monopole antenna does not require an additional matching circuit, which reduces antenna performance loss while ensuring low cost and easy processing. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the dual-band antenna structure applied to a smartwatch with a metal bezel, according to Embodiment 1 of this utility model.

[0018] Figure 2 This is a schematic diagram of the monopole antenna in the dual-band antenna structure of a smartwatch with a metal bezel, according to Embodiment 1 of this utility model.

[0019] Figure 3 A schematic diagram of the current at 1.575 GHz for a dual-band antenna structure applied to a smartwatch with a metal bezel is shown.

[0020] Figure 4 A schematic diagram of the current at 2.45 GHz for a dual-band antenna structure applied to a smartwatch with a metal bezel is shown.

[0021] Figure 5 The simulation results of the return loss of a dual-band antenna structure applied to a smartwatch with a metal bezel are shown.

[0022] Figure 6 The figure shows the simulation results of the antenna efficiency of a dual-band antenna structure applied to a smartwatch with a metal bezel.

[0023] Explanation of icon numbers:

[0024] 1. Metal bezel;

[0025] 2. Plastic outer shell;

[0026] 3. Monopole antenna; 31. Arc section; 32. Vertical section; 33. Extension stub;

[0027] 4. Motherboard;

[0028] 5. Power supply point. Detailed Implementation

[0029] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0032] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0033] Furthermore, if the meaning of "and / or" appears throughout the text, it refers to three parallel solutions. For example, "and / or" includes solution 1, solution 2, and solution 3, which simultaneously satisfy the above conditions. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] Example 1

[0036] Please refer to Figures 1 to 6 Embodiment 1 of this utility model is as follows: Figure 1 and Figure 2 As shown, a dual-band antenna structure for a smartwatch with a metal bezel includes a metal bezel 1, a plastic housing 2, a monopole antenna 3, and a mainboard 4. The plastic housing 2 is located below the metal bezel 1 and is ring-shaped. The monopole antenna 3 is disposed on the inner wall of the plastic housing 2 and coupled to the metal bezel 1. Preferably, the monopole antenna 3 is an LDS antenna. The mainboard 4 is electrically connected to the monopole antenna 3 to form a feed point 5. In this dual-band antenna structure for a smartwatch with a metal bezel, the feed point 5 does not require any matching circuitry.

[0037] In this embodiment, the plastic outer shell 2 and the metal bezel 1 are both circular. The monopole antenna 3 includes a connected arc portion 31 and a vertical portion 32. The end of the vertical portion 32 away from the arc portion 31 is connected to the main board 4 for power supply. There is a gap between the arc portion 31 and the metal bezel 1.

[0038] In one or more embodiments, at least one end of the arcuate portion 31 has an extending branch 33, the width of which is greater than or less than the width of the arcuate portion 31. In this embodiment, the width of the extending branch 33 is less than the width of the arcuate portion 31.

[0039] In some embodiments, the connection between the vertical portion 32 and the arc portion 31 may be located corresponding to the center of the arc portion 31, while in this embodiment, the connection between the vertical portion 32 and the arc portion 31 is located off-center from the center of the arc portion 31.

[0040] In this embodiment, the dual-band antenna structure applied to a smartwatch with a metal bezel is described. The monopole antenna 3 is laser-printed onto the plastic casing 2. The motherboard 4 directly feeds the monopole antenna 3, which is then coupled to the metal bezel 1, thereby achieving two different resonance modes (which can be tuned by adjusting the lengths at both ends of the monopole antenna 3), thus realizing the radiation performance of GPS / WiFi dual-band.

[0041] Next, we will explain the process by generating two different resonance modes: 1.575G and 2.45G.

[0042] Figure 3 A schematic diagram of the current at 1.575 GHz for a dual-band antenna structure applied to a smartwatch with a metal bezel is shown. Figure 3 It can be seen that at 1.575 GHz, the current flows from the left end of the arc of the monopole antenna to the feed point, and then from the feed point to the right end of the arc. Compared with the two ends of the arc, the current at the feed point is stronger and couples with the metal bezel, generating a 1.575 GHz resonant mode.

[0043] Figure 4 A schematic diagram of the current at 2.45 GHz for a dual-band antenna structure applied to a smartwatch with a metal bezel is shown. Figure 3 It can be seen that at 2.45GHz, the current flows from the feed point to both ends of the arc. Compared with the feed point, the current at both ends of the arc is stronger and is coupled with the metal bezel, generating a 2.45GHz resonant mode.

[0044] Figure 5 The image shows the simulation results of the return loss of a dual-band antenna structure applied to a smartwatch with a metal bezel. Figure 5 It can be seen that at 1.575 GHz, the simulated antenna return loss is less than -5.4 dB, and at 2.4-2.5 GHz, the simulated antenna return loss is less than -10 dB.

[0045] Figure 6 The image shows the simulation results of the antenna efficiency of a dual-band antenna structure applied to a smartwatch with a metal bezel. Figure 6 It can be seen that the antenna simulation efficiency is greater than -4.6dB at 1.575GHz and greater than -0.6dB at 2.4-2.5GHz.

[0046] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings under the inventive concept of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1.A dual-band antenna structure applied to a smart watch with a metal bezel, characterized in that: include Metal bezel; A plastic housing, located below the metal bezel, the plastic housing being ring-shaped; A monopole antenna is disposed on the inner wall of the plastic housing and coupled to the metal bezel; The motherboard is fed to the monopole antenna. 2.The dual-band antenna structure applied to a smart watch with a metal bezel according to claim 1, wherein: The monopole antenna is an LDS antenna. 3.The dual-band antenna structure applied to a smart watch with a metal bezel according to claim 1, wherein: The plastic outer shell and the metal bezel are both circular. 4.The dual-band antenna structure applied to a smart watch with a metal bezel of claim 3, wherein: The monopole antenna includes a connected arc portion and a vertical portion. The end of the vertical portion away from the arc portion is connected to the main board for power supply. There is a gap between the arc portion and the metal bezel. 5.The dual-band antenna structure applied to a smart watch with a metal bezel of claim 4, wherein: At least one end of the arc portion has an extension branch, the width of which is greater than or less than the width of the arc portion. 6.The dual-band antenna structure applied to a smart watch with a metal bezel of claim 4, wherein: The connection point between the vertical portion and the arc portion is offset from the center of the arc portion.

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