wearable devices

Abstract

A wearable device includes a conductive frame, a circuit board, and a grounding element. The conductive frame includes a spaced-apart first portion and a second portion. The circuit board is disposed within the conductive frame and includes a system ground plane. The grounding element is disposed within the conductive frame and connected to the first portion. The first portion and the grounding element together constitute a first antenna. The first portion has a first feed terminal. The grounding element has a first ground terminal connected to the system ground plane of the circuit board. The second portion constitutes a second antenna. The second antenna has a second feed terminal, a second ground terminal, and a third ground terminal. The second and third ground terminals are connected to the system ground plane of the circuit board.

Description

Technical Field

[0001] This invention relates to a wearable device, and more particularly to a wearable device with a conductor frame as an antenna. Background Technology

[0002] Antenna length is an important parameter used to adjust antenna matching. For products with metal casings as antennas, the trend towards miniaturization limits the lowest frequency band the antenna can reach. Summary of the Invention

[0003] The present invention provides a wearable device that can maintain a sufficient feed point to ground point length on a miniaturized wearable device to achieve an ideal operating frequency band.

[0004] The wearable device of the present invention includes a conductive frame, a circuit board, and a grounding member. The conductive frame includes a first portion and a second portion separated from each other. The circuit board is disposed within the conductive frame and includes a system ground plane. The grounding member is disposed within the conductive frame and connected to the first portion. The first portion and the grounding member together serve as a first antenna. The first portion has a first feed terminal. The grounding member has a first ground terminal, which is connected to the system ground plane of the circuit board. The second portion serves as a second antenna. The second antenna has a second feed terminal, a second ground terminal, and a third ground terminal. The second ground terminal and the third ground terminal are connected to the system ground plane of the circuit board.

[0005] In one embodiment of the present invention, the circuit board further includes a first side and a second side opposite to each other. A first feed terminal is located on the first side of the circuit board, and a grounding component is located on the second side of the circuit board. The grounding component is connected to the first feed terminal through a conductive component penetrating the circuit board.

[0006] In one embodiment of the present invention, a battery is further included, disposed within a conductor frame and stacked on the second side of the circuit board.

[0007] In one embodiment of the present invention, the grounding member has a three-dimensional structure. The grounding member is located next to the battery and forms an accommodating space between itself and the second surface of the circuit board, and an electronic component is located within the accommodating space.

[0008] In one embodiment of the present invention, the circuit board further includes a matching circuit, wherein the first feed terminal is connected to the matching circuit, or the first portion is connected to the matching circuit at a location away from the first feed terminal.

[0009] In one embodiment of the present invention, the length of the first part is equal to the length of the second part.

[0010] In one embodiment of the present invention, the first antenna excites a first frequency band, and the length of the first part and the grounding element is one-quarter of the wavelength of the first frequency band; the second antenna excites a second frequency band, and the length of the second part is one-quarter of the wavelength of the second frequency band.

[0011] In one embodiment of the present invention, there are two slits at the junction of the first part and the second part, and two insulating joints are filled into the two slits to connect the first part and the second part.

[0012] In one embodiment of the invention, at least one electronic component is further included, disposed within the conductor frame, located next to the circuit board and close to the first portion.

[0013] In one embodiment of the present invention, the aforementioned at least one electronic component includes at least one of a stereo camera, a center camera, and a laser projector.

[0014] Based on the above, this invention, by setting up a grounding component, allows the length of the antenna grounding structure to be extended without changing the size of the external components, thus meeting the operating frequency requirements and enabling each antenna to achieve good matching. Furthermore, this invention can also adjust the impedance matching of the desired frequency band by modifying the length of the grounding component, increasing flexibility in use. Attached Figure Description

[0015] Figure 1a This is a schematic diagram of a wearable device according to an embodiment of the present invention.

[0016] Figure 1b yes Figure 1a An exploded view of a wearable device.

[0017] Figure 2 yes Figure 1a Top view of the wearable device.

[0018] Figure 3 yes Figure 1a Bottom view of the wearable device.

[0019] Figure 4 yes Figure 3 A partial cross-sectional view of the wearable device along line segment AA.

[0020] Figure 5 This is a schematic diagram showing the relationship between the frequency band and reflection loss of the first antenna with and without grounding.

[0021] Figure 6a This is a schematic diagram showing the relationship between the frequency band and antenna efficiency of the first antenna with and without a grounding component.

[0022] Figure 6bThis is a schematic diagram showing the relationship between the other frequency band and antenna efficiency for a first antenna with and without a grounding component.

[0023] Figure 7 This is a schematic diagram showing the relationship between the frequency band and reflection loss of the second antenna of a wearable device.

[0024] Figure 8 This is a schematic diagram illustrating the relationship between the frequency band and antenna efficiency of a second antenna for wearable devices. The reference numerals in the diagram are explained below:

[0025] 20: Wearable devices

[0026] 210: Top Cover

[0027] 220: Conductor outer frame

[0028] 221: Part One

[0029] 221a: First feed end

[0030] 223: Part Two

[0031] 223a: Second feed end

[0032] 223b: Second grounding terminal

[0033] 223c: Third grounding terminal

[0034] 225: Two slits

[0035] 227: Two insulating joints

[0036] 230: Circuit board

[0037] 231: First Page

[0038] 232: Second Page

[0039] 233: System ground plane

[0040] 235: First Clear Zone

[0041] 237: Second Clear Zone

[0042] 239: Matching Circuit

[0043] 240: Grounding component

[0044] 241: First grounding terminal

[0045] 243: Conductor

[0046] 250: Electronic Components

[0047] 260: Battery

[0048] 270: Bottom Cover

[0049] A1: First antenna

[0050] A2: Second Line

[0051] B1: First frequency band

[0052] B2: Second frequency band

[0053] E1: Electronic components

[0054] S: Storage space Detailed Implementation

[0055] Figure 1a This is a schematic diagram of a wearable device according to an embodiment of the present invention. Figure 1b yes Figure 1a An exploded view of a wearable device. Figure 2 yes Figure 1a Top view of the wearable device. Figure 3 yes Figure 1a A bottom view of the wearable device. See also Figures 1a to 3 The wearable device 20 in this embodiment includes an upper cover 210, a conductive outer frame 220, a circuit board 230, a grounding component 240, electronic components 250, a battery 260, and a lower cover 270 made of non-metallic material. It should be particularly noted that... Figure 2 and Figure 3 For ease of explanation, the upper cover 210 and the lower cover 270 are hidden from the illustration.

[0056] In this embodiment, the conductor frame 220 is made of, for example, metal. The metallic appearance of the wearable device 20 enhances its attractiveness and overall quality. The conductor frame 220 includes a spaced-apart first portion 221 and a second portion 223. The length of the first portion 221 is approximately equal to the length of the second portion 223, which allows the wearable device 20 to have a symmetrical appearance and improves its aesthetics; however, this invention is not limited to this. Furthermore, a circuit board 230 is disposed within the conductor frame 220 and includes a system ground plane 233 (see [reference]). Figure 2 Grounding component 240 (see reference) Figure 3 It is disposed within the conductor frame 220 and connected to the first part 221.

[0057] In this embodiment, the first part 221 and the grounding element 240 together serve as a first antenna A1. The second part 223 serves as a second antenna A2. The conductor frame 220 can also be disassembled into more parts as needed to form a multi-antenna structure with two or more antennas, and the present invention does not limit this.

[0058] Please continue reading. Figure 2 and Figure 3The first part 221 has a first feed-in terminal 221a. The grounding member 240 has a first ground terminal 241, which is connected to the system ground plane 233 of the circuit board 230.

[0059] The second antenna A2 has a second feed terminal 223a, a second ground terminal 223b, and a third ground terminal 223c. The second ground terminal 223b and the third ground terminal 223c are connected to the system ground plane 233 of the circuit board 230.

[0060] Traditionally, since the conductor frame 220, as an external component, has a fixed size, if the length of the first part 221 needs to be changed to adjust antenna matching, the second part 223 also needs to be modified simultaneously. In other words, when the length of the first part 221 increases, the length of the second part 223 decreases accordingly, and vice versa. While this approach allows the first antenna A1 to reach the required frequency band, it affects the frequency band of the second antenna A2.

[0061] The configuration of the grounding member 240 in this embodiment extends the length of the first antenna A1 and increases the distance between the feed end and the ground end while maintaining the external dimensions of the first part 221 and the second part 223, so that the first antenna A1 can meet the requirements of matching the required frequency band.

[0062] Furthermore, the conductor frame 220 has two slits 225 at the junction of the first part 221 and the second part 223, and two insulating joints 227 are inserted into the two slits 225 to connect the first part 221 and the second part 223. The provision of the two insulating joints 227 can prevent the first part 221 and the second part 223 from conducting.

[0063] Please continue reading. Figure 2 and Figure 3 The wearable device 20 further includes at least one electronic component 250 disposed within the conductor frame 220. The electronic component 250 is located next to the circuit board 230 and close to the first portion 221, while the circuit board 230 is close to the second portion 223. In this embodiment, the at least one electronic component 250 includes at least one of a stereo camera, a center camera, and a laser projector, but the invention is not limited thereto.

[0064] In this embodiment, most of the frame of the first portion 221 is close to the edge of the electronic component 250, and the portion of the first portion 221 that is close to the circuit board 230 is only near both ends of the first portion 221. Therefore, the first feed end 221a can only be selected to be located at one of the two ends of the first portion 221, which is somewhat limited.

[0065] Conversely, the second part 223 is located at the edge of the circuit board 230, so the second feed end 223a can be set at any position on the second part 223, and is not limited to both ends.

[0066] Figure 4 yes Figure 3 A partial cross-sectional view of the wearable device along line segment AA. See also... Figures 2 to 4 Specifically, circuit board 230 further includes a first surface 231 and a second surface 232 opposite to each other. A first feed terminal 221a is located on the first surface 231 of circuit board 230, and a grounding member 240 is located on the second surface 232 of circuit board 230. One end of the grounding member 240 is connected to the first feed terminal 221a through a conductive member 243 passing through circuit board 230, while the first grounding terminal 241 is disposed at the other end of the grounding member 240 and connected to the system ground plane 233 of circuit board 230.

[0067] In this embodiment, the grounding element 240 has a three-dimensional structure, such as an inverted Ω shape. Figure 4 As shown, but the invention is not limited thereto. Please continue reading. Figure 4 The length of the grounding component 240 can be adjusted according to modal matching, making flexible use of limited space. The grounding component 240 is located next to the battery 260 and forms an accommodating space S between itself and the second surface 232 of the circuit board 230. An electronic component E1 can be located within the accommodating space S to increase the space utilization of the circuit board 230. In other words, the three-dimensional structural design of the grounding component 240 not only utilizes the internal space of the wearable device 20 to increase the length of the first part 221, but also provides space to accommodate the electronic component E1, so that the electronic component E1 can still be configured on the second surface 232 without being affected by the grounding component 240.

[0068] In addition, the grounding component 240 may be made of metal, but the present invention does not limit this. It may also be made of plastic with metal traces instead of LDS (Laser Direct Structuring) technology to improve the flexibility of use.

[0069] Please return Figure 2 In this embodiment, the circuit board 230 further includes a first clearance area 235, a second clearance area 237, and a matching circuit 239. The first clearance area 235 is disposed on the circuit board 230 corresponding to the first feed terminal 221a. The second clearance area 237 is disposed on the circuit board 230 corresponding to the second feed terminal 223a. Figure 2As shown, the matching circuit 239 is connected to one end of the first portion 221. More specifically, the matching circuit 239 is connected to the end away from the first feed terminal 221a. In one embodiment, the matching circuit 239 may also be located next to and connected to the first feed terminal 221a. By switching different matching circuits 239, the wearable device 20 can meet different low-frequency band requirements (600MHz to 960MHz) or improve the matching effect.

[0070] See Figure 3 The battery 260 is disposed within the conductor frame 220 and stacked on the second surface 232 of the circuit board 230. Of course, the battery 260 may also be disposed on the first surface 231 of the circuit board 230 or in other positions within the conductor frame 220 as required by the design, and the present invention does not limit this.

[0071] The following explains the differences in the operating frequency bands of the first antenna A1 and the second antenna A2 of the wearable device 20, as well as the differences between wearable devices with and without grounding components.

[0072] In this embodiment, the first antenna A1 emits a first frequency band B1, and the length of the first portion 221 and the grounding element 240 is one-quarter of the wavelength of the first frequency band B1. The first frequency band B1 is, for example, a low-frequency band of 607–960 MHz, but is not limited thereto. In this embodiment, the operating frequency band of the first antenna A1 covers the low-frequency band of 607–960 MHz, the mid-frequency band of 1710–2200 MHz, and the high-frequency band of 2496–2690 MHz.

[0073] The second antenna A2 emits a second frequency band B2, the length of which is one-quarter of the wavelength of the second frequency band B2. The second frequency band B2 is, for example, an intermediate frequency band of 1710–2200 MHz, but is not limited to this. The operating frequency band of the second antenna A2 covers the GPS band of 1575 MHz, the intermediate frequency band of 1710–2200 MHz, the Wi-Fi band of 2400–2480 MHz, and the high frequency band of 2496–2690 MHz.

[0074] Figure 5 This is a schematic diagram showing the relationship between the frequency band and reflection loss of the first antenna in wearable devices with and without grounding. Please refer to [link / reference]. Figure 5In a comparison between an antenna without a grounding element (only the first part 221 serves as the first antenna) and an antenna A1 with a grounding element (the first part 221 and the grounding element 240 serve as the first antenna), in the low-frequency band (607–960 MHz), the antenna without a grounding element has the smallest reflection loss of -10 dB, while the antenna with a grounding element has the smallest reflection loss of -13 dB; in the mid-frequency band (1710–2200 MHz), the antenna without a grounding element has the smallest reflection loss of -7 dB, while the antenna with a grounding element has the smallest reflection loss of -20 dB; in the high-frequency band (2496–2690 MHz), the antenna without a grounding element has the smallest reflection loss of -2 dB, while the antenna with a grounding element has the smallest reflection loss of -9 dB.

[0075] In short, the wearable device 20 with a grounding element of the present invention exhibits superior performance in terms of reflection loss in the low-frequency band (607-960MHz), mid-frequency band (1710-2200MHz), and high-frequency band B3 (2496-2690MHz) compared to wearable devices without a grounding element.

[0076] Figure 6a This is a schematic diagram showing the relationship between the frequency band and antenna efficiency of the first antenna with and without a grounding component. Figure 6b This diagram illustrates the relationship between the frequency of another frequency band and the antenna efficiency for both grounded and ungrounded antennas. Please refer to it. Figure 6a and Figure 6b In the comparison between antennas with and without grounding, in the mid-frequency band (1710–2200 MHz), the antenna efficiency without grounding is as low as -8 dB, while the antenna efficiency with grounding is as low as -17 dB; in the high-frequency band (2496–2690 MHz), the antenna efficiency without grounding is as low as -7 dB, while the antenna efficiency with grounding is as low as -10 dB.

[0077] In other words, the antenna efficiency of the wearable device 20 in this embodiment is superior to that of a wearable device without a grounding component in the low frequency band (607-960MHz), mid frequency band (1710-2200MHz), and high frequency band (2496-2690MHz).

[0078] Figure 7 This is a schematic diagram showing the relationship between the frequency band and reflection loss of the second antenna of a wearable device. Figure 8 This is a diagram illustrating the relationship between the frequency band and antenna efficiency of a wearable device's second antenna. Please refer to... Figure 7 and Figure 8In this embodiment, the second antenna A2 of the wearable device 20 has good performance in terms of reflection loss and antenna efficiency in the GPS band (1575MHz), the intermediate frequency band (1710~2200MHz), the Wi-Fi band (2400~2480MHz), and the high frequency band (2496~2690MHz).

[0079] In summary, wearable devices without a grounding element (only the first part 221) cannot achieve good reflection loss when the antenna length is insufficient, and the operating bandwidth is also reduced, resulting in poor antenna efficiency. This invention, through the configuration of the aforementioned grounding element 240, can extend the grounding structure length of the first antenna A1 without changing the structure of the second antenna A2. This allows the wearable device 20 to maintain good reflection loss while achieving a miniaturized appearance, thereby obtaining better antenna efficiency. Therefore, the wearable device 20 can achieve good reflection loss and antenna efficiency without affecting the structure of the second antenna A2.

[0080] In summary, by incorporating a grounding component, this invention allows for the extension of the antenna grounding structure's length to meet operating frequency requirements without altering the dimensions of the external components, ensuring good matching for all antennas. Furthermore, this invention can also adjust the impedance matching of the desired frequency band by modifying the length of the grounding component, increasing flexibility in application.

Claims

1. A wearable device, characterized in that, include: A conductor frame, comprising a spaced-apart first portion and a second portion; A circuit board is disposed within the conductor frame and includes a system ground plane; as well as A grounding element is disposed within the outer frame of the conductor and connected to the first part, wherein The first part and the grounding element together constitute a first antenna. The first part has a first feed terminal, and the grounding element has a first ground terminal. The first ground terminal is connected to the system ground plane of the circuit board. The grounding element is used to extend the distance between the first feed terminal and the first ground terminal. The circuit board includes a first side and a second side opposite to each other. The first feed terminal is located on the first side of the circuit board, and the grounding component is located on the second side of the circuit board. The grounding component is connected to the first feed terminal through a conductive component that passes through the circuit board. The first ground terminal is used for grounding, and the first feed terminal is used for signal feeding. The second part serves as a second antenna, which has a second feed terminal, a second ground terminal, and a third ground terminal, which are connected to the system ground plane of the circuit board.

2. The wearable device as described in claim 1, characterized in that, Including: A battery is disposed within the conductor frame and stacked on the second side of the circuit board.

3. The wearable device as described in claim 2, characterized in that, The grounding component has a three-dimensional structure. The grounding component is located next to the battery and forms an accommodating space between it and the second surface of the circuit board. An electronic component is located within the accommodating space.

4. The wearable device as described in claim 1, characterized in that, The circuit board further includes a matching circuit, to which the first feed terminal is connected, or where the first portion is connected to the matching circuit at a location remote from the first feed terminal.

5. The wearable device as claimed in claim 1, characterized in that, The length of the first part is equal to the length of the second part.

6. The wearable device as claimed in claim 1, characterized in that, The first antenna emits a first frequency band, and the length of the first part and the grounding element is one-quarter of the wavelength of the first frequency band. The second antenna emits a second frequency band, and the length of the second part is one-quarter of the wavelength of the second frequency band.

7. The wearable device as claimed in claim 1, characterized in that, There are two slits at the junction of the first part and the second part, and two insulating joints are filled into the two slits to connect the first part and the second part.

8. The wearable device as claimed in claim 1, characterized in that, Including: At least one electronic component is disposed within the conductor frame, located next to and near the first portion of the circuit board.

9. The wearable device as claimed in claim 8, characterized in that, The at least one electronic component includes at least one of a stereo camera, a center camera, and a laser projector.

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