WO2020164499A1 - 一种应用于智能皮带系统的皮带天线 - Google Patents

一种应用于智能皮带系统的皮带天线 Download PDF

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Publication number
WO2020164499A1
WO2020164499A1 PCT/CN2020/074801 CN2020074801W WO2020164499A1 WO 2020164499 A1 WO2020164499 A1 WO 2020164499A1 CN 2020074801 W CN2020074801 W CN 2020074801W WO 2020164499 A1 WO2020164499 A1 WO 2020164499A1
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belt
smart
antenna
buckle
belt buckle
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PCT/CN2020/074801
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English (en)
French (fr)
Inventor
马波力
林永义
黄漪
王炤
裴睿
王璟琛
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西交利物浦大学
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Publication of WO2020164499A1 publication Critical patent/WO2020164499A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B11/00—Buckles; Similar fasteners for interconnecting straps or the like, e.g. for safety belts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/44—Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna, e.g. means for giving an antenna an aesthetic aspect

Definitions

  • This application belongs to the field of wireless communication technology, for example, relates to an antenna of a smart wearable device.
  • Wearable devices in related technologies basically have data collection and data transmission capabilities at the same time, and the ability of wearable devices is inseparable from the huge advantages brought by data interaction and even cloud processing and control. Therefore, wireless communication modules play a very important role in wearable devices.
  • some antennas specially designed for use in wearable devices can improve the communication efficiency of these devices.
  • the structure of the antenna should minimize the discomfort caused by the long-term use of the wearable device. For this reason, the structural design of the antenna should be as close as possible to the original state of clothing or accessories to avoid excessive size, weight, or high structure.
  • the use environment of wearable devices must be considered in the antenna design process.
  • the use environment of wearable devices is more complicated, and one of the most important factors is the human body.
  • the absorption of electromagnetic waves by the human body will affect the quality of communication on the one hand, and has a potential impact on the human body on the other hand.
  • Wireless communication equipment used close to the human body must be able to meet the Specific Absorption Rate (SAR) standard.
  • SAR Specific Absorption Rate
  • the human body does not necessarily remain constant. Therefore, the influence of different human postures and motion patterns on the antenna must also be considered.
  • the gain, radiation direction, and efficiency of the antenna need special consideration.
  • the battery capacity of wearable devices is generally limited.
  • An antenna with high radiation efficiency can reduce power consumption while ensuring communication quality.
  • the radiation direction and gain of the antenna must be specially designed in conjunction with the working environment of the wearable device itself, and omnidirectional antennas are not suitable in many cases.
  • the present application provides a belt antenna applied to a smart belt system with a simple structure.
  • a belt antenna applied to a smart belt system including a belt buckle
  • the belt buckle includes an unclosed square ring made of metal material, and the gap of the square ring is connected by insulating material to form a complete Belt buckle.
  • Figure 1 is a schematic diagram of the front structure of an embodiment of the application
  • FIG. 2 is a schematic diagram of the back structure of an embodiment of the application.
  • FIG. 3 is a return loss diagram of an embodiment of the application in three different situations: no human body, human body standing, and human body sitting down;
  • Fig. 4 is an antenna pattern of an embodiment of the application.
  • Wearable devices are electronic devices that can be directly worn by users. Such equipment can be integrated into clothing, clothing decoration accessories, or other wearing accessories. Among related technologies, more successful commercial wearable devices include smart watches, smart bracelets and smart glasses.
  • wearable device antennas In the design of wearable device antennas, it is possible to consider the use of metal parts in some wearable articles, such as temples and frames, metal buttons or zippers.
  • a belt antenna applied to a smart belt system includes a belt buckle 1.
  • the belt buckle 1 includes an unclosed square ring made of metal material. The notches of the square ring are connected by insulating material 11 to form a complete belt buckle 1.
  • the belt antenna applied to the smart belt system also includes an upper cover plate 2 made of metal material. The upper cover plate 2 is connected to the belt buckle 1 through two L-shaped brackets 21 on the side, and the L-shaped bracket 21 is welded to the belt.
  • Buckle 1 on. It also includes a belt pin 3 made of insulating material. The belt pin 3 is sleeved on the feeding side of the belt buckle 1 through two rings 31.
  • the belt antenna refers to an antenna provided on a belt.
  • the unclosed square ring refers to a square ring with gaps.
  • the insulating material 11 is connected to the gap of the unclosed square ring to form the belt buckle 1 together with the unclosed square ring.
  • the belt buckle 1 is composed of the unclosed square ring and the insulating material 11.
  • the feeding side is the side of the belt buckle 1 where the insulating material 11 is located.
  • the unclosed square ring-shaped notch made of metal material in the belt buckle 1 is the two ports for introducing signal input.
  • the notch is connected by insulating material 11 to form a complete belt buckle 1, and at the same time isolates the two ports.
  • the upper cover plate 2 structurally functions to fix the perforated leather 4 of the belt, and also functions to generate a coupling current to change the radiation properties of the belt antenna.
  • the addition of the upper cover allows more radiation to be directed outside the human body, which enhances the radiation effect and reduces the human body’s specific absorption rate.
  • Figure 3 is a graph of return loss under three different conditions of no human body, human body standing, and human body sitting down. It can be seen from the figure that the working frequency band below -10dB when the human body is standing is 2.288 ⁇ 2.814 GHz (bandwidth is 526MHz), the center frequency is 2.438GHz. When the human body is sitting down, the working frequency band below -10dB is 2.392 ⁇ 2.896MHz (band width is 504MHz), and the center frequency is 2.662GHz. Both of these two working environments can fully meet the requirements of low-power Bluetooth communication.
  • Figure 4 is an antenna pattern of an embodiment, where (a) and (b) show the E-plane and H-plane patterns of the antenna when the human body is standing at 2.45Ghz, and the actual gain is 4.373dBi; (c) and (d) are the E-plane and H-plane patterns of the antenna when the human body sits down at 2.45Ghz, and the actual gain is 4.968dBi.
  • the shown pattern and gain can better meet the communication requirements between the smart belt and other devices.
  • Theta and Phi are the bases of the spherical coordinate system;
  • Theta/Degree vs.dB is the dB value that varies with the angle of Theta;
  • Phi/Degree vs.dB is the difference in Phi The dB value of the angle change.
  • the unclosed square ring-shaped gap made of metal material in the belt buckle is the two ports for introducing signal input.
  • the gap is connected by insulating material to form a complete belt buckle, and the two ports are isolated at the same time, thus cleverly
  • the existing belt buckle is used as an antenna, the structure is simple, and no additional antenna is required.

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Abstract

本申请公开了一种应用于智能皮带系统的皮带天线，包括皮带扣，皮带扣包括由金属材料制成的不封闭四方环形，四方环形的缺口处通过绝缘材料衔接组成完整的皮带扣。

Description

一种应用于智能皮带系统的皮带天线
本公开要求在2019年02月12日提交中国专利局、申请号为201910111253.9的中国专利申请的优先权，以上申请的全部内容通过引用结合在本公开中。
技术领域
本申请属于无线通信技术领域，例如涉及一种智能穿戴设备的天线。
背景技术
相关技术中的可穿戴设备基本都同时拥有数据采集和数据传输能力，可穿戴设备能力的发挥离不开数据交互甚至云端处理和控制带来的巨大优势。因此，无线通信模块在可穿戴设备中扮演了非常重要的角色。除了使用相关技术中的板载天线之外，一些特别为可穿戴设备使用情景设计的天线可以提高这些设备的通信效率。
在设计可穿戴设备使用的通信天线时，可以考虑以下几个要点：
第一，天线的结构应当尽量减小可穿戴设备长期使用给使用者带来的不适感。为此，天线的结构设计应该尽可能接近衣物或配饰的原始状态，避免过大的尺寸、重量或者过高的结构。
第二，天线设计的过程中必须考虑到可穿戴设备的使用环境。可穿戴设备的使用环境较为复杂，其中非常重要的一个影响因素就是人体。人体对电磁波的吸收，一方面会影响通信质量，另一方面也对人体有潜在的影响。靠近人体使用的无线通信设备必须能够满足比吸收率(Specific Absorption Rate，SAR)的标准。在可穿戴设备使用的过程中，人体并不一定会是保持恒定不动的。因此，不同的人体姿势，运动方式对天线的影响也必须被考虑在内。
第三，天线的增益、辐射方向与效率需要得到特殊考量。可穿戴设备的电池容量一般受限，一个拥有较高辐射效率的天线可以在保证通信质量的前提下降低功耗。天线的辐射方向和增益必须结合可穿戴设备本身的工作环境特别设计，全向性天线在很多情况下并不适合。
发明内容
本申请提供一种结构简单的应用于智能皮带系统的皮带天线。
本申请是通过以下技术方案实现的：一种应用于智能皮带系统的皮带天线， 包括皮带扣，皮带扣包括由金属材料制成的不封闭四方环形，四方环形的缺口处通过绝缘材料衔接组成完整的皮带扣。
附图说明
图1为本申请一实施例正面结构示意图；
图2为本申请一实施例背面结构示意图；
图3为本申请一实施例在无人体，人体站立，人体坐下三种不同情况下的回波损耗图；
图4为本申请一实施例天线方向图。
具体实施方式
下面结合附图及具体实施方式对本申请进行详细描述：
可穿戴设备即可以被用户直接穿戴于身上的电子设备。这样的设备可被集成于衣物，衣物装饰附件，或其他穿戴附件上。相关技术中，较为成功的商业化可穿戴设备包括智能手表，智能手环和智能眼镜等。
可穿戴设备天线的设计可以考虑利用一些穿戴物品中本身即为金属的部分，例如眼镜腿和镜框，金属的扣子或拉链等。
本申请一实施例结构如图1和图2所示，一种应用于智能皮带系统的皮带天线，包括皮带扣1，所述皮带扣1包括由金属材料制成的不封闭四方环形，所述四方环形的缺口处通过绝缘材料11衔接组成完整的皮带扣1。所述应用于智能皮带系统的皮带天线还包括由金属材料制成的上盖板2，上盖板2通过侧边两个L型支架21连接在皮带扣1上，L型支架21焊接在皮带扣1上。还包括由绝缘材料制成的皮带插销3，皮带插销3通过两个圆环31套设在皮带扣1的馈电侧。
可理解的是，所述皮带天线是指一种设于皮带的天线。
本实施例中，所述不封闭四方环形是指，具有缺口的四方环形。
如图1-2所示，在本实施例中，所述绝缘材料11衔接于所述不封闭四方环形的缺口处，以与所述不封闭四方环形共同组成所述皮带扣1，本实施例中，所述皮带扣1由所述不封闭四方环形和所述绝缘材料11组成。
在本实施例中，如图2所示，所述馈电侧为所述皮带扣1上所述绝缘材料11所在的一侧。
本实施例中，皮带扣1中由金属材料制成的不封闭四方环形的缺口为引入信号输入的两个端口，缺口处通过绝缘材料11衔接组成完整的皮带扣1，同时隔绝了两个端口，从而巧妙地将皮带扣用作天线，结构简单，无需额外安装天线。上盖板2在结构上起到了固定皮带的打孔皮革4的作用，还起到了产生耦合电流以改变皮带天线辐射性质的作用。增加上盖板使得更多的辐射被引向人体之外的方向，增强了辐射效果，降低了人体的辐射比吸收率。
图3为一实施例在无人体、人体站立、人体坐下三种不同情况下的回波损耗图，由图可见，在人体站立时-10dB以下的工作频段为2.288～2.814GHz(频带宽度为526MHz)，中心频率为2.438GHz。在人体坐下时-10dB以下的工作频段为2.392～2.896MHz(频带宽度为504MHz)，中心频率为2.662GHz。在这两种工作环境中都完全可以满足低功耗蓝牙通信的使用要求。
图4为一实施例天线方向图，其中(a)和(b)所示分别为人体站立情况下天线在2.45Ghz时的E面和H面方向图，实际增益为4.373dBi；(c)和(d)分别为人体坐下情况下天线在2.45Ghz时的E面和H面方向图，实际增益为4.968dBi。所示方向图和增益可以较好地满足智能皮带与其他设备之间的通信要求。
可理解的是，在图4所示的天线方向图中，Theta和Phi是球坐标系的基；Theta/Degree vs.dB为随Theta角度变化的dB值；Phi/Degree vs.dB为随Phi角度变化的dB值。
本申请中，皮带扣中由金属材料制成的不封闭四方环形的缺口为引入信号输入的两个端口，缺口处通过绝缘材料衔接组成完整的皮带扣，同时隔绝了两个端口，从而巧妙地将现有的皮带扣用作天线，结构简单，无需额外安装天线。

Claims (5)

  1. 一种应用于智能皮带系统的皮带天线，包括皮带扣，所述皮带扣包括由金属材料制成的不封闭四方环形，所述四方环形的缺口处通过绝缘材料衔接组成完整的所述皮带扣。
  2. 根据权利要求1所述的应用于智能皮带系统的皮带天线，还包括由金属材料制成的上盖板。
  3. 根据权利要求2所述的应用于智能皮带系统的皮带天线，其中，所述上盖板通过侧边两个L型支架连接在皮带扣上。
  4. 根据权利要求3所述的应用于智能皮带系统的皮带天线，其中，所述L型支架焊接在所述皮带扣上。
  5. 根据权利要求1所述的应用于智能皮带系统的皮带天线，还包括由绝缘材料制成的皮带插销，所述皮带插销通过两个圆环套设在皮带扣的馈电侧。
PCT/CN2020/074801 2019-02-12 2020-02-12 一种应用于智能皮带系统的皮带天线 WO2020164499A1 (zh)

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