CN107808995A - Wearable Communication Device - Google Patents

Abstract

The present invention provides a wearable communication device, comprising a shoe body structure, a grounding element and an antenna element. The shoe body structure comprises a shoe tongue. The grounding element is arranged on the shoe tongue. The antenna element is arranged on the shoe tongue and adjacent to an edge of the grounding element. The antenna element operates in a first frequency band, and the length of the grounding element is not less than 1/4 wavelength of the lowest frequency of the first frequency band.

Description

Wearable Communication Device

technical field

The present invention relates to a communication device, in particular to a wearable communication device.

Background technique

With the rapid development of mobile communication technology, various international manufacturers have begun to develop wearable communication devices. For example, with the popularity of road running and the development of home, health and child care, smart shoes have gradually attracted attention in recent years, and can be used to control people's positioning information, physiological parameters, and road running information. The overall environment of wearable communication devices (such as appearance design, antenna space, ground plane size, and antenna surrounding environment) is far from that of current handheld devices, so wearable communication devices must also have a different design in antenna design Thinking and Applied Technology.

Taking smart shoes as an example, most of the existing smart shoes directly use modular antennas, and the modular antennas are set together with the ground plane in the sole or insole. However, the above approach only focuses on the system integration of smart shoes, ignoring the influence of the human body on the antenna elements. Therefore, the communication quality of existing smart shoes is often poor, and even the positioning may be distorted or invalid.

Contents of the invention

The present invention provides a wearable communication device, which includes a grounding element and an antenna element arranged in the shoe tongue of the shoe body structure, thereby helping to improve the communication quality of the wearable communication device.

The wearable communication device of the present invention includes a shoe body structure, a ground element and an antenna element. The shoe body structure includes the tongue. The grounding element is provided on the tongue. The antenna element is disposed on the tongue and adjacent to an edge of the ground element. In addition, the antenna element operates in the first frequency band, and the length of the ground element is not less than 1/4 wavelength of the lowest frequency of the first frequency band.

In an embodiment of the present invention, the above-mentioned antenna element and ground element are disposed on a substrate, and the substrate is embedded in the shoe tongue.

Based on the above, the wearable communication device of the present invention includes a shoe body structure, and the grounding element and the antenna element are disposed on the shoe tongue of the shoe body structure. Therefore, the influence of the surrounding environment or the human body on the antenna element and the ground element will be effectively reduced, thereby helping to improve the communication quality of the wearable communication device.

Description of drawings

FIG. 1 is a schematic diagram of a wearable communication device according to an embodiment of the invention.

2 and 3 are schematic diagrams of antenna elements according to an embodiment of the present invention, respectively.

FIG. 4 is a graph showing the return loss of the antenna element of the wearable communication device according to an embodiment of the present invention when the human tissue simulation fluid is not placed in it.

FIG. 5 is a diagram of the return loss of the antenna element when the wearable communication device is placed in a human tissue simulation fluid according to an embodiment of the present invention.

FIG. 6 is a radiation efficiency diagram of an antenna element according to an embodiment of the present invention.

Explanation of reference signs:

100: Wearable communication device 110: Shoe body structure

111: Tongue 112: Body

113: Toe cap 114: Lace holes

115: Shoe collar 120: Antenna element

130: Ground element 140: Substrate

150: RF circuit 160: Battery

210: the first radiation part 220: the feeding part

230: second radiating portion 201: side length

FP2: Feed Point 310: Part 1

320: Part Two 330: Closed Slots

SD31: First edge SD32: Second edge

610, 620: curve

Detailed ways

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

FIG. 1 is a schematic diagram of a wearable communication device according to an embodiment of the invention. As shown in FIG. 1 , the wearable communication device 100 may be, for example, a smart shoe. Specifically, the wearable communication device 100 includes a shoe body structure 110 , and the shoe body structure 110 includes a shoe tongue 111 , a shoe body 112 , a toe cap 113 , a shoelace hole 114 and a shoe opening 115 . In addition, the wearable communication device 100 further includes an antenna element 120 and a ground element 130 .

The antenna element 120 and the ground element 130 are disposed on the tongue 111 , and the antenna element 120 is adjacent to an edge of the ground element 130 . For example, the wearable communication device 100 further includes a substrate 140 . The antenna element 120 and the ground element 130 are disposed on a surface of the substrate 140 , and the substrate 140 can be embedded in the tongue 111 . In other words, the antenna element 120 , the ground element 130 and the substrate 140 can be disposed in the interlayer space of the tongue 111 . In addition, the substrate 140 can be, for example, a flexible printed circuit board, and can be bent according to the surface of the human foot, so that the tongue 111 can be attached to the surface of the human foot.

The antenna element 120 is operable in the first frequency band, and the length of the ground element 130 is not less than (ie, greater than or equal to) 1/4 wavelength of the lowest frequency of the first frequency band. Therefore, miniaturization of the antenna element 120 will be facilitated. also. When the user wears the wearable communication device 100 , the tongue 111 is located above the foot of the human body, that is, the foot of the human body will not cover the antenna element 120 and the ground element 130 disposed in the tongue 111 . Therefore, the antenna element 120 and the ground element 130 can be prevented from being affected by the human body, that is, the influence of the surrounding environment on the antenna element 120 and the ground element 130 can be reduced, thereby helping to improve the communication quality of the wearable communication device 100 .

For example, the first frequency band covered by the antenna element 120 may be, for example, the 1.57542 GHz frequency band used by the global positioning system (GPS for short). In addition, the antenna element 120 disposed in the shoe tongue 111 will facilitate the wearable communication device 100 to receive satellite signals from GPS in the sky, thereby avoiding the wearable communication device 100 from being distorted or invalid. Furthermore, the antenna element 120 and the ground element 130 disposed in the shoe tongue 111 are not easily affected by the surrounding environment, thereby improving the stability of the communication quality of the wearable communication device 100 . Relatively, with the improvement of the stability of the communication quality, the wearable communication device 100 does not need additional matching circuits or matching components, thereby helping to reduce the production cost of the wearable communication device 100 .

Furthermore, the wearable communication device 100 further includes a radio frequency circuit 150 and a battery 160 . Wherein, the radio frequency circuit 150 and the battery 160 are disposed on the substrate 140 . That is, the radio frequency circuit 150 and the battery 160 can also be disposed in the interlayer space of the tongue 111 . In addition, the radio frequency circuit 150 can be electrically connected to the feeding point of the antenna element 120 through a coaxial cable, so as to provide signals to the antenna element 120 or receive signals from the antenna element 120 . The battery 160 can be used to provide power required by the wearable communication device 100 . For example, the battery 160 can provide an operating voltage to the radio frequency circuit 150 .

FIG. 2 and FIG. 3 are schematic diagrams of an antenna element according to an embodiment of the present invention respectively, and the structure and operation of the antenna element 120 will be further described below with reference to FIG. 2 and FIG. 3 . As shown in FIGS. 2 and 3 , the antenna element 120 includes a first radiating portion 210 , a feeding portion 220 and a second radiating portion 230 . Wherein, the first end of the feeding part 220 has a feeding point FP2 , and the second end of the feeding part 220 is electrically connected to the first radiation part 210 .

It is worth mentioning that the feeding part 220 and the first radiating part 210 can form a patch antenna structure, and the antenna element 120 can operate in the first frequency band through the patch antenna structure. Specifically, the first radiating portion 210 may be, for example, a square metal sheet. In addition, since the length of the ground element 130 is not less than 1/4 wavelength of the lowest frequency of the first frequency band, the side length 201 of the first radiating part 210 (that is, the square metal sheet) can be less than 1/4 of the lowest frequency of the first frequency band. /2 wavelength, thereby contributing to the miniaturization of the antenna element 120. For example, in one embodiment, the side length 201 of the first radiating part 210 (that is, the square metal sheet) may be about 1/6 to 1/8 wavelength of the lowest frequency of the first frequency band. For example, the first frequency band may be 1.57542 GHz frequency band, and the side length 201 of the first radiation part 210 (that is, the square metal sheet) may be 23 millimeters (mm).

Please continue to refer to FIG. 3 , the first radiation portion 210 (that is, the square metal piece) includes a first portion 310 and a second portion 320 that are electrically connected. That is, the first radiation part 210 (ie, the square metal sheet) can be divided into a first part 310 and a second part 320 based on the feeding part 220 . Wherein, the first portion 310 includes adjacent first edges SD31 and second edges SD32 . The first edge SD31 of the first portion 310 is electrically connected to the second end of the feeding portion 220 , and the second edge SD32 of the first portion 310 is electrically connected to the first end of the second radiation portion 230 . In addition, the second end of the second radiating portion 230 is electrically connected to the feeding portion 220 , and the second radiating portion 230 surrounds the first edge SD31 and the second edge SD32 of the first portion 310 .

Therefore, as shown in FIG. 3, the second radiating part 230, the first part 310 and the feeding part 220 can form a loop antenna (loop antenna) structure, and the antenna element 120 can operate in the second frequency band through the loop antenna structure, for example: 2.45 GHz band. Specifically, the second radiating part 230 , the first part 310 and the feeding part 220 can form a closed slot hole 330 , and the circumference of the closed slot hole 330 is about 1/2 wavelength of the lowest frequency of the second frequency band. In addition, the second radiating part 230 can be, for example, a C-shaped metal sheet, so as to surround the first edge SD31 and the second edge SD32 of the first part 310 .

Fig. 4 is a graph showing the return loss of the antenna element of the wearable communication device according to an embodiment of the present invention when it is not placed in a human tissue simulation fluid, and Fig. 5 is a diagram of the wearable communication device according to an embodiment of the present invention when it is placed in a human body Return loss plot of the antenna element when the tissue simulates fluid. As shown in FIG. 4 and FIG. 5 , the frequency range of the antenna element 120 can cover 1.57 GHz and 2.4 GHz˜2.5 GHz under the conditions of not placing the simulated human tissue and placing the simulated human tissue fluid. In addition, FIG. 6 is a diagram of the radiation efficiency of the antenna element according to an embodiment of the present invention, wherein the curve 610 is the radiation efficiency of the antenna element 120 when it is not placed in the human tissue simulation liquid, and the curve 620 is the radiation efficiency of the antenna element 120 when it is placed in the human tissue simulation fluid. The radiation efficiency of the antenna element 120 when liquid.

As shown in FIG. 6 , when the wearable communication device 100 is placed in the simulated human tissue liquid, the radiation efficiency of the antenna element 120 decreases by less than 1 dB compared to the case where the simulated human tissue liquid is not inserted. In other words, disposing the antenna element 120 and the ground element 130 in the shoe tongue 111 can effectively reduce the influence of the surrounding environment or the human body on the antenna element 120 and the ground element 130 . Therefore, the antenna element 120 can still maintain a good radiation efficiency even when it is placed in the simulated human tissue fluid, thereby helping to improve the communication quality of the wearable communication device 100 .

To sum up, the wearable communication device of the present invention includes a shoe body structure, and the antenna element and the grounding element are disposed together on the shoe tongue of the shoe body structure. Therefore, the influence of the surrounding environment or the human body on the antenna element and the ground element will be effectively reduced, thereby helping to improve the communication quality of the wearable communication device. In addition, the antenna element can operate in the first frequency band, and the length of the ground element is not less than 1/4 wavelength of the lowest frequency of the first frequency band. Therefore, miniaturization of the antenna element will be facilitated.

Although the present invention has been disclosed above with the embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the technical field can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the claims.

Claims (10)

1. a kind of weared communication device, including：

One shoe body structure, including a flap；

One earth element, it is arranged on the flap；

One antenna element, is arranged on the flap, and an edge of the neighbouring earth element, and wherein antenna element operation is one the One frequency range, and the length of the earth element is not less than 1/4 wavelength of the low-limit frequency of first frequency range.

2. weared communication device according to claim 1, it is characterised in that the antenna element is set with the earth element On a substrate, and the substrate is embedded in the flap.

3. weared communication device according to claim 2, it is characterised in that also include：

One radio circuit, set on the substrate, and provide a FD feed to the antenna element.

4. weared communication device according to claim 3, it is characterised in that also including a battery, and the battery is set On the substrate, and an operating voltage is provided to the radio circuit.

5. weared communication device according to claim 1, it is characterised in that the antenna element includes：

One first irradiation unit；

One feeding portion, its first end has a load point, and the second end of the feeding portion is electrically connected with first irradiation unit, wherein The feeding portion forms a patch-antenna structure with first irradiation unit, and the antenna element is operated by the patch-antenna structure First frequency range.

6. weared communication device according to claim 5, it is characterised in that first irradiation unit is a square metal Piece.

7. weared communication device according to claim 6, it is characterised in that the length of side of the square sheet metal for this first 1/6 to 1/8 wavelength of the low-limit frequency of frequency range.

8. weared communication device according to claim 6, it is characterised in that the square sheet metal includes what is be electrical connected One Part I and a Part II, a first edge of the Part I are electrically connected with the second end of the feeding portion, and the day Kind of thread elements also includes：

One second irradiation unit, its first end are electrically connected with a second edge of the Part I, the second end of second irradiation unit The feeding portion is electrically connected with, and second irradiation unit wherein should around the first edge and the second edge of the Part I Second irradiation unit, the Part I and the feeding portion form a loop aerial structure, and the antenna element passes through the annular day Cable architecture is operated in one second frequency range.

9. weared communication device according to claim 8, it is characterised in that the loop aerial structure includes a locked groove Hole, and 1/2 wavelength of the low-limit frequency of the Zhou Changwei in the locked groove hole second frequency ranges.

10. weared communication device according to claim 8, it is characterised in that second irradiation unit is a C font metals Piece.