智能手表天线研究

发布时间：2018-01-04 14:24

本文关键词：智能手表天线研究　出处：《华南理工大学》2014年硕士论文　论文类型：学位论文

【摘要】：可穿戴无线通信设备是直接穿在身上或是整合到用户的衣服或配件的一种便携式通信设备。迄今为止，对可穿戴智能设备的研究已经从概念研究转向了实体研究，比如：谷歌眼镜、导航鞋、智能手环、智能手表等。智能手表作为一种符合人们佩戴习惯的新型可穿戴移动智能终端，能够通过手表与互联网相连，满足信息推送的功能，它的便携性和可穿戴性吸引着人们进一步去完善它的功能，比如，独立完成与通信网络连接、在特殊情况下能够代替手机等。为满足不断增长的智能需求，实现无线信号的有效发送与接收，研究新型天线是实现智能手表的关键。本文系统研究新型智能手表天线的基本结构和实现方法。论文首先探究了可穿戴天线的介质基板、人体电磁特性和放置在人体的天线需要满足的相关性能，然后对适用于基于表带的智能手表天线的小型化、多频化、宽带化的关键技术分别进行了介绍，最后提出了一种适用于智能手表的小型化宽带多频天线结构。论文第三章提出了一种基于表带的智能手表直板天线，采用多弯折辐射枝节技术，实现了小型化的天线结构，天线尺寸为40mm136mm，与普通手表的尺寸相当。天线具有多频和宽频的特点，天线电压驻波比VSWR3（回波损耗6dB）的带宽覆盖870-990MHz、1530-1610MHz、2050-3230MHz、3350-3770MHz、4090-6850MHz频段，相对带宽分别为12.9%、2.5%、44.7%、11.8%、50.5%。第四章结合实际情况，研究将天线与戴在手腕上的手表共形后的性能。以人体手腕为参考，将戴在手腕上的手表的形状抽象为一个由九个矩形平面连接而成的环状结构，天线被蚀刻在位于侧边的三个矩形面上。弯折后天线的VAWR3带宽为0.93-0.94GHz、1.48-1.61GHz、1.93-3.23GHz、3.4-3.76GHz、4.02-6.17GHz、6.36-6.69GHz，可完全覆盖GPS（1.575-GHz）、WiMAX、WiFi频段。本章还研究了由手腕粗细不同导致的天线基板弯曲度不同而引起的参数变化对天线性能的影响，为智能手表天线的实际应用提供了参考依据。第五章对放在人体手腕上的基于表带的智能手表天线的性能进行了研究。仿真的人体手腕模型为一种简化结构，由皮肤、脂肪、肌肉和骨骼组成。为了避免天线地板与人体直接接触，，在天线和人体模型中间留有一层泡沫介质。天线实物隔着泡沫放置在人体手腕上进行测量，天线VSWR3的带宽覆盖0.78-0.89GHz、1.42-3.22GHz、3.35-3.85GHz、4.05-4.36GHz、4.55-6.15GHz、6.25-6.61GHz频段。上述结果表明，提出的基于表带的智能手表天线能够应用于新型智能手表通信系统。
[Abstract]:A wearable wireless communication device is a portable communication device that is worn directly on the body or integrated into the clothes or accessories of the user. Research on wearable smart devices has shifted from conceptual to physical, such as Google Glass, navigation shoes, and smart bracelets. As a new wearable mobile intelligent terminal, smart watch can connect with the Internet through watch and meet the function of information push. Its portability and wearability attract people to further improve its functions, for example, to complete the communication network connection independently, can replace the mobile phone in special circumstances, in order to meet the growing demand for intelligence. It is the key to realize the smart watch to transmit and receive the wireless signal effectively and to study the new antenna. This paper systematically studies the basic structure and the realization method of the new smart watch antenna. In this paper, the dielectric substrate of wearable antenna, the electromagnetic characteristics of human body and the correlation energy of antenna placed in human body are discussed. Then, the miniaturization and multi-frequency of smart watch antenna based on watch band are discussed. The key technologies of wideband are introduced respectively. Finally, a miniaturized wideband multi-frequency antenna structure for smart watches is proposed. In the third chapter, a kind of smart watch antenna based on watch band is proposed. The antenna structure is miniaturized by using multi-bending radiation branch technology. The size of antenna is 40mm 136mm. The antenna has the characteristics of multi-frequency and wide-band. The VSWR3 (return loss 6dB) has a bandwidth coverage of 870-990MHz. The relative bandwidth of 1530-1610MHzn 2050-3230MHz / 3350-3770MHzn 4090-6850MHz is 12.9% respectively. Two and a half and forty four seven and eleven eight and fifty five and a half. Chapter 4th, combined with the actual situation, studies the performance of the antenna conformal with the watch worn on the wrist, taking the wrist of the human body as a reference. Abstract the shape of the watch worn on the wrist into a ring of nine rectangular planes. The antenna is etched on three rectangular surfaces on the side. The VAWR3 bandwidth of the bent antenna is 0.93-0.94GHz, 1.48-1.61GHz. 1.93-3.23GHzn 3.4-3.76GHz 4.02-6.17GHz 6.36-6.69GHz. It can fully cover the GPS 1.575-GHz WiMAX. In this chapter, we also study the effect of the parameter changes caused by the different curvature of the antenna substrate caused by the different wrist thickness on the antenna performance, which provides a reference for the practical application of smart watch antenna. Chapter 5th studies the performance of a watch antenna based on a watch band on a human wrist. The simulated human wrist model is a simplified structure consisting of skin and fat. In order to avoid direct contact between the antenna floor and the human body, a layer of foam medium is left between the antenna and the human body model. The antenna object is placed on the wrist of the human body through foam to be measured. The bandwidth of the antenna VSWR3 is 0.78-0.89GHz, 1.42-3.22GHz, 3.35-3.85GHz, 4.05-4.36GHz. The above results show that the proposed smart watch antenna based on watch band can be applied to a new type of smart watch communication system.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN820

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