TWI623148B - Wearable Device with Wide Bandwidth Antenna - Google Patents

Abstract

A wearable device with a broadband antenna includes a wrapable component and a snap component, wherein a wraparound component is provided with a wireless communication module, and the snap component is provided with an antenna. The positioning post of the fastening component is used as a feeding path of the antenna. When the positioning post contacts the component, the operation of the wireless communication module can be triggered to activate the wireless positioning tracking function. The antenna can support the operating frequency bands defined by wireless communication technologies such as GPS, WLAN, WiFi and Bluetooth, so the above communication technology can be integrated into a single wearable device.

Description

Wearable device with broadband antenna

The present invention refers to a wearable device, and more particularly to a wearable device having a broadband antenna.

Because the smart wearable device can integrate intelligent computing, wired/wireless communication and location tracking, and can be worn on the user without leaving, it can be used for wireless location tracking of seniors and young children in daily life. To reduce the occurrence of disappearances and to help improve law and order. In addition, the smart wearable device can also be used for wireless location tracking of mountaineering outdoor activities. When a user accidentally falls into the sea or a valley stream, the missing person can be found through the wireless location tracking function. Furthermore, the smart wearable device can be worn on the pet as a pet collar, so that the wireless location tracking function can be further prevented to prevent the pet from being lost and to facilitate the search of the pet.

In general, wireless location tracking enables smart wearables through wireless communication technologies such as Global Positioning System (GPS), Wireless Local Area Network (WLAN), WiFi, and Bluetooth. This is achieved by establishing a connection between the device and other computer devices with wireless communication capabilities. In practice, in addition to the corresponding wireless communication module, it is necessary to match the antenna with sufficient bandwidth to meet the frequency range specified by the above wireless communication technology. Therefore, how to design a broadband antenna and integrate the above communication technology into a single smart wearable device is one of the important topics in the field.

Accordingly, it is a primary object of the present invention to provide a wearable device having a wideband antenna that is adaptable to a range of frequencies defined by a variety of wireless communication technologies.

The invention discloses a wearable device comprising a wrapable component and a snap component. The wireless communication module can be arranged around the component, and the fastening component is provided with an antenna. The positioning pillar of the fastening component is used as the feeding path of the antenna, and the wireless communication module can be triggered when the positioning pillar contacts the component. The operation to activate the wireless location tracking function. In addition, since the antenna and the wireless communication module are respectively disposed on the fastening component and the splicable component, the signal interference between the two can be reduced. For example, the circuit signal or the baseband RF signal generated by the wireless communication module or other electronic components is compared. Not easy to interfere with the antenna. Furthermore, the wideband antenna of the present invention has a frequency range defined by wireless communication technologies such as GPS, WLAN, WiFi, and Bluetooth, and thus the above communication technology can be integrated into a single wearable device.

1A and 1B are respectively a top view and a side view of a wearable device 10 according to an embodiment of the present invention. The wearable device 10 can be a smart belt, belt or wristband, etc., worn on the user's waist, wrist or arm. The wearable device 10 includes a wrapable component 12 and a snap component 14. A plurality of positioning holes 122 are formed around the component 12, and a wireless communication module 120 is disposed. The fastening component 14 includes a base 140, a positioning post 142, and an antenna 144.

The wireless communication module 120 is connected to the plurality of positioning holes 122 for outputting an RF signal RF_sig to a plurality of positioning holes 122. The fastening component 14 is coupled to the windable component 12 for engaging a first end E1 and a second end E2 of the windable component 12 to fix the relative position between the windable component 12 and the fastening component 14. One end of the base 140 is coupled to the first end E1 of the member 12. The positioning post 142 is disposed on the base 140. The user can hold the second end E2 to bend the wrapable component 12, and the positioning post 142 contacts one of the plurality of positioning holes 122 to fix the wrapable component 12 and the fastening component 14 Relative position between. The antenna 144 is disposed on the base 140. When the positioning post 142 contacts one of the plurality of positioning holes 122, the antenna 144 can be connected to the wireless communication module 120 through the positioning post 142 and the plurality of positioning holes 122 to receive the RF. Signal RF_sig. In this case, when the signal is transmitted, the antenna 144 can radiate the RF signal RF_sig into the air, and when receiving the signal, the antenna 144 can sense other RF signals from the air to pass through the positioning post 142 and one of the plurality of positioning holes 122. To connect to the wireless communication module 120, thereby implementing wireless communication.

In a practical application, the wearable device 10 can be a belt. The circumscribing component 12 can be a belt body for winding around the waist of the user, and is provided with a wireless communication module 120 for generating the RF signal RF_sig and performing modulation and demodulation of the RF signal. The fastening component 14 can be a belt buckle head provided with an antenna 144 for connecting the antenna 144 and the wireless communication module 120 for wireless communication when the belt buckle buckles the belt. In other words, the positioning post of the belt buckle can be used as a feeding path for the antenna, and when the positioning post contacts the belt body, the operation of the wireless communication module can be triggered. Therefore, when the user attaches the belt, the wireless location tracking function can be activated. In addition, since the antenna and the wireless communication module are respectively disposed on the belt buckle and the belt body, the signal interference between the two can be reduced. For example, the circuit signal or the base frequency RF signal generated by the wireless communication module or other electronic components is relatively difficult. Interfering with the antenna.

2A and 2B are respectively a top view and a bottom view of the antenna 144 according to an embodiment of the present invention. The antenna 144 includes a feed microstrip line 20, radiators 21, 22 and 23, a parasitic element 24, a feed end 25, a substrate 26 and an impedance matching element 27. The substrate 26 includes a first surface and a second surface, and is formed with an antenna pattern of a top view and a bottom view, respectively.

As shown in FIG. 2A, the feeding end 25 is connected to the positioning post 142. When the positioning post 142 contacts one of the plurality of positioning holes 122, the feeding end 25 can pass through one of the positioning post 142 and the plurality of positioning holes 122. To connect to the wireless communication module 120 to receive the RF signal RF_sig. The feed microstrip line 20 is electrically connected to the feed end 25 and extends in the -Y direction. The radiator 21 is electrically connected to the feeding microstrip line 20 for resonating one of the first signal components of the RF signal RF_sig. The radiator 21 includes arms 211 and 212. The arm 211 is electrically connected to the feeding microstrip line 20 and extends in the +X direction. The arm 212 is electrically connected to the feeding microstrip line and extends in the +Y direction, wherein the +Y direction is perpendicular to +X direction. The radiator 22 is electrically connected to the arm 212 fed to the microstrip line 20 and the radiator 21 for resonating with one of the second signal components of the RF signal RF_sig. The feed end 25, the feed microstrip line 20, and the radiators 21 and 22 are formed on the first side of the substrate 26.

The radiator 21 exhibits an L shape, the length L20 of the microstrip line 20, the length L211 of the arm 211, and the length L212 of the arm 212. The sum of the lengths is about a quarter of the wavelength of the first signal component of the RF signal RF_sig. . In one embodiment, the first signal may have a frequency of 2.4 to 2.5 GHz and a frequency octave of 4.8 to 5 GHz for use in a frequency range defined by WLAN, WiFi, and Bluetooth wireless communication technologies. The radiator 22 exhibits a T shape in which the radiator 22 has a maximum width W22_max of 50 to 52 mm, a minimum width W22_min of 28 to 30 mm, a maximum height H22_max of 38 to 40 mm, and a minimum height H22_min of 14 to 16 mm. In one embodiment, the second signal component has a frequency of 1.5 to 1.6 GHz for use in a frequency range defined by GPS wireless communication technology.

The radiator 22 includes arms 221 and 222, wherein the arms 221 are used to resonate one of the fourth signal components of the RF signal RF_sig. The arm 221 has a rectangular shape, and the arm 221 has a width W221 of 50 to 52 mm and a height H221 of 4 to 7 mm. In one embodiment, the fourth signal component has a frequency of 5.15 to 5.85 GHz for use in a frequency range defined by WLAN and WiFi wireless communication technologies. The parasitic element 24 is formed on the first surface of the substrate 26, and is electrically connected to the feeding microstrip line 20 and the arm 221 for adjusting the impedance matching of the radiators 21 and 22.

As shown in FIG. 2B, the radiator 23 is formed on the second surface of the substrate 26, and an open slot 230 is formed for generating a coupling effect with the radiator 22 to adjust the impedance matching of the radiator 22 so that the radiator 22 A resonant mode of the third signal component of one of the RF signals RF_sig is generated. In one embodiment, the third signal component has a frequency of 2 to 2.4 GHz to increase the bandwidth of the antenna 144. The radiator 23 exhibits a T shape, and the maximum width (same W22_max) of the radiator 23 is 50 to 52 mm, the minimum width (same as W22_min) is 28 to 30 mm, the maximum height H23_max is 28 to 30 mm, and the minimum height H23_min is 0.6 to 0.8 mm. In one embodiment, the radiator 23 presents a rectangle. In this case, the width of the radiator 23 (same as W22_min) is 28 to 30 mm, and the height (same as H23_max) is 28 to 30 mm. The opening slot 230 has a width W230 of 2 to 3 mm and a height H230 (same as H23_max) of 28 to 30 mm.

The impedance matching element 27 is formed on the second side of the substrate 26 and is connected to a ground portion GND for matching the input impedance of the antenna 144. The impedance matching element 27 exhibits a rectangular shape, and the impedance matching element 27 has a width W27 of 12.5 to 16.2 mm and a height H27 of 12.5 to 16.5 mm. In an embodiment, the impedance matching component 27 can contact the grounding portion GND line on the component 12 when the positioning post 142 contacts the positioning hole 122 (see FIG. 1A), thereby connecting to the system ground of the wireless communication module 120. .

Therefore, in the architecture of FIG. 2A and FIG. 2B, the operating frequency band of the antenna 144 includes a frequency range defined by wireless communication technologies such as GPS, WLAN, WiFi, and Bluetooth to integrate the above communication technology into a single smart wearable type. In the device.

3 and 4 respectively show the reflection coefficient S11 of the antenna 144 and the radiation efficiency. As shown in Fig. 3, the reflection coefficient S11 of the antenna 144 at a frequency of 1.575 GHz (for GPS), a frequency of 2.4 to 2.5 GHz, and a frequency of 5.15 to 5.85 GHz (for WLAN, WiFi, and Bluetooth) are all lower than -10 dB; As shown in Fig. 4, the radiation efficiency of the antenna 144 at a frequency of 1.575 GHz, a frequency of 2.4 to 2.5 GHz, and a frequency of 5.15 to 5.85 GHz is higher than -4 dB. Therefore, the antenna 144 can be applied to a frequency range defined by wireless communication technologies such as GPS, WLAN, WiFi, and Bluetooth.

In summary, the wearable device of the present invention is provided with a wireless communication module in the splicable component, an antenna is disposed on the fastening component, and a positioning post of the fastening component is used as a feeding path of the antenna. When the positioning post contacts the component, the operation of the wireless communication module can be triggered to initiate the wireless location tracking function. In addition, since the antenna and the wireless communication module are respectively disposed on the fastening component and the splicable component, the signal interference between the two can be reduced. For example, the circuit signal or the baseband RF signal generated by the wireless communication module or other electronic components is compared. Not easy to interfere with the antenna. Furthermore, the antenna of the present invention can support operating frequency bands defined by wireless communication technologies such as GPS, WLAN, WiFi, and Bluetooth, so that the above communication technology can be integrated into a single wearable device. The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

<TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> 10 </td><td> Wearable device</td></tr><tr ><td> 12 </td><td> wrapable component</td></tr><tr><td> 14 </td><td> snap-fit component</td></tr><tr ><td> 120 </td><td> Wireless Communication Module</td></tr><tr><td> 122 </td><td> Positioning Hole</td></tr><tr ><td> 140 </td><td> pedestal</td></tr><tr><td> 142 </td><td> positioning column</td></tr><tr><td > 144 </td><td> Antenna</td></tr><tr><td> E1 </td><td> First End</td></tr><tr><td> E2 </td><td> second end</td></tr><tr><td> RF_sig </td><td> RF signal</td></tr><tr><td> GND < /td><td> Grounding </td></tr><tr><td> 20 </td><td> Feeding the microstrip line</td></tr><tr><td> 21. 22,23 </td><td> radiator </td></tr><tr><td> 230 </td><td> open slot</td></tr><tr><td > 24 </td><td> Parasitic Components</td></tr><tr><td> 25 </td><td> Feeding Ends</td></tr><tr><td> 26 </td><td> Substrate</td></tr><tr><td> 27 </td><td> Impedance matching component</td></tr><tr><td> 211, 212, 221, 222 </td><td> arms </td></tr><tr><td> L20, L211, L212 < /td><td> Length</td></tr><tr><td> W22_max, W22_min, W230, W27 </td><td> Width</td></tr><tr><td> H22_max, H22_min, H221, H23_max, H23_min, H230, H27 </td><td> Height</td></tr><tr><td> X, Y </td><td> Direction </td> </tr></TBODY></TABLE>

1A and 1B are respectively a top view and a side view of a wearable device according to an embodiment of the present invention. 2A and 2B are respectively a top view and a bottom view of the antenna of the first embodiment of the present invention. Fig. 3 and Fig. 4 respectively show the reflection coefficient S11 and the radiation efficiency of the antenna of Fig. 1A.

Claims (15)

A wearable device comprising: a wrapable component, a wireless communication module configured to generate an RF signal; and a snap component coupled to the wrapable component for engaging a wrapable component The first end and the second end include: a base connected to the first end of the rewritable component; a positioning post disposed on the base and connected to the wireless communication module for receiving the RF signal, wherein The second end of the windable component is formed with a plurality of positioning holes, the positioning post can pass through one of the plurality of positioning holes to fix the relative position between the wrapable component and the fastening component; and an antenna The pedestal is disposed on the base, and includes: a feeding end connected to the positioning post, wherein the RF signal is fed to the feeding end through the positioning post; a feeding microstrip line is electrically connected to the feeding end, Extending along a first direction; a first radiator electrically connected to the feeding microstrip line for resonating one of the first signal components of the RF signal, comprising a first arm electrically connected to the feeding micro Strip line, extending along a second direction And a second arm electrically connected to the first arm and extending in a reverse direction of the first direction, wherein the first direction is perpendicular to the second direction; a second radiator electrically connected to And feeding the microstrip line and the first radiator to resonate with one of the second signal components of the RF signal; and a substrate, wherein the feeding end, the feeding microstrip line, the first radiator, and the first The second radiator is formed on a first side of the substrate. The wearable device of claim 1, wherein the first radiator exhibits an L shape, and the sum of the length of the feed microstrip line, the length of the first arm, and the length of the second arm is about the RF signal. One quarter wavelength of the first signal component. The wearable device of claim 1, wherein the frequency of the first signal component of the radio frequency signal is 2.4 to 2.5 GHz. The wearable device of claim 1, wherein the second radiator exhibits a T shape. The wearable device of claim 4, wherein the T-shape of the second radiator has a maximum width of 50 to 52 mm, a minimum width of 28 to 30 mm, a maximum height of 38 to 40 mm, and a minimum height of 14 to 16 mm. The wearable device of claim 1, wherein the second signal component of the radio frequency signal has a frequency of 1.5 to 1.6 GHz. The wearable device of claim 1, wherein the substrate comprises a second surface, and the antenna further comprises: an impedance matching component formed on the second surface of the substrate and connected to a ground portion for Matching an input impedance of the antenna; and forming a third radiator formed on the second surface of the substrate, forming an open slot for generating a coupling effect with the second radiator to adjust the second radiator The impedance is matched such that the second radiator resonates with one of the third signal components of the RF signal. The wearable device of claim 7, wherein the impedance matching element exhibits a rectangle having a width of 12.5 to 16.2 mm and a height of 12.5 to 16.5 mm. The wearable device according to claim 7, wherein the third radiator has a T shape, and the third radiator has a maximum width of 50 to 52 mm, a minimum width of 28 to 30 mm, and a maximum height of 28 to 30. Millimeter and minimum height of 0.6 to 0.8 mm. The wearable device of claim 7, wherein the third radiator exhibits a rectangle having a width of 28 to 30 mm and a height of 28 to 30 mm. The wearable device of claim 7, wherein the open slot has a width of 2 to 3 mm and the open slot has a height of 28 to 30 mm. The wearable device of claim 7, wherein the third signal component of the radio frequency signal has a frequency of 2 to 2.5 GHz. The wearable device of claim 1, wherein the second radiator comprises a third arm for resonating a fourth signal component of the RF signal, wherein the third arm presents a rectangle, the rectangle The width is 50 to 52 mm and the height is 4 to 7 mm. The wearable device of claim 13, wherein the antenna further comprises a parasitic element formed on the first surface of the substrate, electrically connected to the feeding microstrip line and the third arm for adjusting the Matching of the first radiator and the second radiator. The wearable device of claim 13, wherein the frequency of the fourth signal component of the radio frequency signal is 5.15 to 5.85 GHz.