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Dual-frequency button antenna capable of being applied to body area network communication and integrated into clothes

A button and antenna technology, which is applied to antenna equipment with additional functions, antenna supports/installation devices, radiating element structures, etc. Change and other problems, to reduce the influence of human body fading, overcome the wrinkle effect, reduce the effect of coupling effect

Active Publication Date: 2016-01-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The antenna is an important part of the RF front-end. Due to the role of human tissue, the design of the human antenna has encountered great challenges. The following aspects need to be considered: one is the limited space occupied, and the other is the impact of human tissue on the performance of the antenna. , to ensure the robustness of the human body antenna. Third, different communication scenarios of the body area network have different requirements on the performance of the antenna. Fourth, the human body tissue limits the specific absorption rate of the electromagnetic wave energy radiated by the antenna.
[0003] However, most of the design options of human body antennas are directly integrated on the fabric, and the fabric is used as the dielectric substrate. Due to the effect of the human body and the wrinkle effect of the fabric, the performance of these human body antennas is greatly affected, the work is unstable, and the resonance frequency is prone to occur. Bias and mismatch, the radiation pattern has changed a lot
At this stage, there are few designs that integrate the human body antenna with the metal parts of the clothing itself (such as buttons, zippers, etc.). Some researchers in the UK have proposed to use buttons as antennas, but they use a monopole solution. The overall The size is large, and the flexible fabric floor is used, which is easily affected by the human body environment, and there is no discussion on the impact of the fabric wrinkle effect on the floor and antenna performance
[0004] On the other hand, few antenna designs take into account the combination of two communication scenarios on the body area network surface and outside the body

Method used

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  • Dual-frequency button antenna capable of being applied to body area network communication and integrated into clothes
  • Dual-frequency button antenna capable of being applied to body area network communication and integrated into clothes
  • Dual-frequency button antenna capable of being applied to body area network communication and integrated into clothes

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Effect test

Embodiment 1

[0039] In this embodiment, a dual-frequency button antenna that is applied to body area network communication and can be integrated into clothing, such as figure 1 As shown, it is specifically integrated on the upper edge of the zipper of denim shorts, which serves as the original button function, and also serves as an antenna module for body area network wireless communication, integrating the dual-frequency button antenna 12 with the clothing button, which can reduce the It is difficult to manufacture human body fabric antennas by using cloth, which increases the feasibility of integrating wearable antennas with clothing. In addition, the present invention can also be integrated on the chest of the shirt, and can also be integrated with the jacket with buttons without affecting the original appearance and function of the clothes.

[0040] Such as figure 2 As shown, the present invention is composed of a feeding part 1, a metal support base 2 and a radiator 3, and the overa...

Embodiment 2

[0048] Such as Figure 8 Compared with the specific embodiment 1, the specific embodiment 2 of the button antenna of the present invention has made the following changes, the diameter of the floor under the I-shaped metal support base becomes larger, and an asymmetric structure is adopted, and the feed part is connected to the metal support base The point is offset to the right by a certain distance from the center of the lower floor. In addition, the radiator adopts Rogers 4003 plate (RO4003) with more stable performance. The overall structure of the radiator remains unchanged, but the specific parameters need to be fine-tuned and optimized.

[0049] The comparison of the radiation pattern between the human body model and free space is shown in Fig. 9(a), Fig. 9(b), Fig. 9(c) and Fig. 9(d). It can be seen that in the actual working environment of human tissue, the role of the human body makes The radiation pattern of the button antenna changes, and the absorption of human ti...

Embodiment 3

[0051] The Rogers plate is used, and the offset asymmetric structure is also adopted on the I-shaped hard metal support base. The height of the entire button antenna is reduced, and the profile is lower. At the same time, the feeding structure is changed for the convenience of testing. At the same time, in order to reduce the SAR value of the human body’s absorption rate of electromagnetic wave energy in actual conditions, the radius of the floor under the support seat has been increased. Figure 10 . refer to Figure 11 , The simulation test results of the specific embodiment 3 show that the reflection coefficients are very consistent, which verifies the feasibility of the button antenna. Referring to Table 1, when the specific embodiment 3 is working on the human body model, the maximum specific absorption rate SAR value obtained by simulation meets the standards of the United States and the European Union at two resonance frequencies, which verifies the practicability of t...

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Abstract

The invention discloses a dual-frequency button antenna capable of being applied to body area network communication and integrated into clothes. The dual-frequency button antenna comprises a feeding portion, a metal supporting base and a radiator, and is characterized in that the metal supporting base is fixed on the clothes, the radiator forms the body of a button, the metal supporting base is connected with the radiator through the feeding portion, the radiator comprises a dielectric substrate, the upper surface of the dielectric substrate comprises an annular microstrip branch with one end being short-circuited and the other end being open-circuited and a rectangular microstrip branch connected with an inner ring of the annular microstrip branch, the other end of the rectangular microstrip branch is short-circuited, and the rectangular microstrip branch is located at a central position of the dielectric substrate; and the lower surface of the dielectric substrate comprises a circular ring, and the circular ring is in physical contact with the metal supporting base. The dual-frequency button antenna disclosed by the invention has robustness when operating at the human body surface, and is applicable to body area network communication scenes such as the body surface and the external body and wearable wireless electronic equipment.

Description

technical field [0001] The invention relates to an antenna in the field of wearable wireless mobile communication, in particular to a dual-frequency button antenna which is applied to body area network communication and can be integrated into clothing. Background technique [0002] With the in-depth progress of body area network research and the development of information technology, in order to meet the needs of individual medical, entertainment, military, security and other aspects of society, wearable devices have been widely popularized in recent years. Wearable devices are small in size, and most of them need to be integrated on people's clothing or wearing accessories (such as watches, bracelets, glasses, etc.), and basically exchange data through radio frequency. The antenna is an important part of the RF front-end. Due to the role of human tissue, the design of the human antenna has encountered great challenges. The following aspects need to be considered: one is the...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/44H01Q1/22
Inventor 章秀银莫特赵小兰段文
Owner SOUTH CHINA UNIV OF TECH
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