Antenna structure and wearable device

Abstract

The present disclosure relates to an antenna structure and a wearable device. The antenna structure comprises: a metal middle frame comprising a first feeding upper frame point, a second feeding upper frame point, a first grounding point and a second grounding point, the first grounding point being located between the first feeding upper frame point and the second feeding upper frame point; a first radiator formed between the first grounding point and the second grounding point along a first direction, the first radiator covering a first frequency band, the first feeding upper frame point being located on the first radiator; a second radiator formed between the first grounding point and the second grounding point along a second direction, the second radiator covering a second frequency band and a third frequency band, the second feeding upper frame point being located on the second radiator, the first direction and the second direction being opposite.

Description

Technical Field

[0001] This disclosure relates to the field of terminal technology, and more particularly to an antenna structure and wearable device. Background Technology

[0002] In existing wearable devices, the ring-shaped metal frame of the wearable device is usually used as the antenna radiator. In the existing technology, multiple frequency bands are covered by a single radiator. Therefore, it is necessary to adjust and balance the radiation performance of each frequency band. However, the compatibility of multiple frequency bands requires sacrificing the performance of one or more frequency bands, resulting in a deterioration in antenna performance. Utility Model Content

[0003] This disclosure provides an antenna structure and a wearable device to address the shortcomings of related technologies.

[0004] According to a first aspect of the present disclosure, an antenna structure is provided, comprising:

[0005] A metal frame, the metal frame including a first power supply upper frame point, a second power supply upper frame point, a first grounding point and a second grounding point, the first grounding point being located between the first power supply upper frame point and the second power supply upper frame point;

[0006] Along the first direction, a first radiator is formed by a branch between the first grounding point and the second grounding point. The first radiator covers the first frequency band, and the first feed frame point is located on the first radiator.

[0007] Along the second direction, a second radiator is formed by a branch between the first grounding point and the second grounding point. The second radiator covers the second frequency band and the third frequency band. The second feed frame point is located on the second radiator. The first direction and the second direction are opposite.

[0008] Optional, including:

[0009] First combiner;

[0010] GPS chip, wherein the GPS chip is provided with a first power supply point;

[0011] The cellular chip has a second feed point. The first feed and the second feed are connected in parallel to the first combiner and electrically connected to the upper frame point of the first feed through the first combiner.

[0012] Optionally, a second combiner may be included, wherein the GPS chip is provided with a third power supply point;

[0013] The antenna structure also includes a Bluetooth chip or a Wi-Fi chip. The Bluetooth chip or Wi-Fi chip has a fourth feed point. The third feed point and the fourth feed point are connected in parallel to the second combiner and electrically connected to the upper feed point of the second feed frame via the second combiner.

[0014] Optionally, the first radiator may also cover the cellular frequency band.

[0015] Optionally, it also includes a tuning switch circuit, one end of which is grounded and the other end is electrically connected between the first combiner and the first radiator.

[0016] The tuning switch circuit includes a tuning chip and tuning elements. The tuning chip includes a multiplexer connected in series with each tuning element. The tuning chip is used to switch the operating frequency band of the first radiator.

[0017] Optionally, the first frequency band includes a first GPS frequency band, and the second frequency band includes a second GPS frequency band; and / or,

[0018] The third frequency band includes the Bluetooth frequency band.

[0019] Optionally, the first GPS frequency band includes the GPS L5 frequency band, and the second GPS frequency band includes the GPS L1 frequency band.

[0020] Optionally, the metal frame is an annular metal frame, and the central angle formed by the first power supply upper frame point and the second power supply upper frame point is greater than 90° and less than or equal to 180°.

[0021] Optionally, it also includes a first reserved grounding point and a second reserved grounding point, wherein the first reserved grounding point is set close to the first grounding point and the second reserved grounding point is set close to the second grounding point.

[0022] According to a second aspect of the present disclosure, a wearable device is provided, including an antenna structure as described in any of the foregoing embodiments.

[0023] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0024] As can be seen from the above embodiments, this disclosure covers the first frequency band, the second frequency band, and the third frequency band together through the first radiator and the second radiator. Compared with covering them simultaneously through the same radiator, this can reduce the difficulty of the debugging stage, facilitate the compatibility of antenna performance of the first frequency band, the second frequency band, and the third frequency band, and ensure the performance advantages of each frequency band.

[0025] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0027] Figure 1 This is a schematic diagram of an antenna structure according to an exemplary embodiment.

[0028] Figure 2 This is a radiation efficiency curve of a first radiator in an antenna structure according to an exemplary embodiment.

[0029] Figure 3 This is a radiation efficiency curve of a second radiator in an antenna structure according to an exemplary embodiment.

[0030] Figure 4 This is an architectural diagram of an antenna structure according to an exemplary embodiment. Detailed Implementation

[0031] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0032] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0033] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0034] Figure 1This is a schematic diagram of an antenna structure according to an exemplary embodiment, which is applied to wearable devices, such as wristbands, watches, and rings. The antenna structure includes a metal frame 1, which includes a first upper feed point 11, a second upper feed point 12, a first ground point 13, and a second ground point 14. The first ground point 13 is located between the first upper feed point 11 and the second upper feed point 12. For example, taking a ring-shaped metal frame 1, the first upper feed point 11 is located between the first ground point 13 and the second ground point 14, and the second upper feed point 12 is also located between the first ground point 13 and the second ground point 14. The first upper feed point 11, the second upper feed point 12, the first ground point 13, and the second ground point 14 are located inside the ring-shaped metal frame 1 to facilitate electrical connection to a circuit board.

[0035] Based on the annular feature of the metal frame 1, a first radiator 15 is formed along a first direction from the first grounding point 13 to the second grounding point 14, and a second radiator 16 is formed along a second direction from the same point. Furthermore, a first power supply upper frame point 11 is located within the first radiator 15, and a second power supply upper frame point 12 is located within the second radiator 16. The first and second directions are arranged in opposite directions, for example... Figure 1 As shown, the first radiator 15 is a branch from the first grounding point 13 in a clockwise direction to the second grounding point 14, and the second radiator 16 is a branch from the first grounding point 13 in a counterclockwise direction to the second grounding point 14.

[0036] For example, such as Figure 1As shown, taking the annular metal frame 1 as an example, the first radiator 15 is a partial branch in the upper right region of the annular metal frame 1, and the second radiator 16 is a partial branch in the lower left region of the annular metal frame 1. The first radiator 15 covers the first frequency band, and the second radiator 16 covers the second and third frequency bands. This configuration, with the first radiator 15 and the second radiator 16 jointly covering the first, second, and third frequency bands, reduces the difficulty of the debugging phase compared to covering them simultaneously with a single radiator. It also facilitates compatibility of antenna performance across the first, second, and third frequency bands, ensuring the performance advantages of each band. For example, the first radiator 15 can cover the first GPS frequency band, such as the GPS L5 band, and the second radiator 16 can cover the second GPS frequency band and the Bluetooth band, such as the second GPS frequency band including the GPS L1 band. Alternatively, the first GPS frequency band includes the GPS L1 band, and the second GPS frequency band includes the GPS L5 band. Furthermore, since the GPS L1 and GPS L5 bands are covered by different radiators, it is advantageous to tune the GPS L1 and GPS L5 bands separately without needing to be compatible with the other, which helps to improve their respective radiation efficiency.

[0037] Taking the application of this antenna structure in a wearable device, including a watch, and the metal frame 1 including a watchband frame as an example, with the first GPS frequency band being the GPS L5 band and the second GPS frequency band being the GPS L1 band, the overall simulation optimization of the watchband frame worn on a simulated arm yields the following results. Figure 2 The radiation efficiency curve of the first radiator 15 shown is as follows: Figure 3 The radiation efficiency curve of the second radiator 16 is shown. See also... Figure 2 and Figure 3 It can be seen that the radiation efficiency of the GPS L5 band reaches -11.1dB, the radiation efficiency of the GPS L1 band reaches -9.1dB, and the radiation efficiency of the Bluetooth band also reaches -9.8dB. Compared with existing technical solutions, the performance of the GPS L1 band and the GPS L2 band is improved by about 3dB.

[0038] In this embodiment, to reduce mutual interference between feeders, the first feeder upper frame point 11 and the second feeder upper frame point 12 can be spaced apart. For example, the central angle formed between the first feeder upper frame point 11 and the second feeder upper frame point 12 can be greater than or equal to 90° and less than or equal to 180°. For instance, the first feeder upper frame point 11 can be located approximately at the one o'clock position of the annular metal frame 1, and the second feeder upper frame point 12 can be located at the six o'clock, seven o'clock, or eight o'clock position to increase the spacing between the first feeder upper frame point 11 and the second feeder upper frame point 12, which is beneficial for feeder wiring. Alternatively, the first feeder upper frame point 11 can also be located at the two o'clock or three o'clock position, and the second feeder upper frame point 12 can also be located at the nine o'clock or ten o'clock position. The optimal distance between the first feeder upper frame point 11 and the second feeder upper frame point 12 is six o'clock positions, that is, a central angle of 180° is optimal.

[0039] In some embodiments, the first radiator 15 also covers cellular frequency bands to facilitate the expansion of application scenarios for wearable devices. For example... Figure 4 As shown, the antenna structure also includes a first combiner 2, a GPS chip 3, and a cellular chip 4. The GPS chip 3 has a first feed point 31, and the cellular chip 4 has a second feed point 41. The first feed point 31 and the second feed point 41 are connected in parallel to the first combiner 2, and are electrically connected to the first feed upper frame point 11 through the first combiner 2. In this way, the electrical signal fed in through the second feed point 41 can excite the first radiator 15 to cover the cellular frequency band and the GPS frequency band, and the signal is connected to the first radiator 15 through the first combiner 2 to achieve the combined output of multi-band signals. Of course, other radio frequency devices can be set in the circuit between the first combiner 2 and the GPS chip 3, and other radio frequency devices can also be set between the first combiner 2 and the cellular chip 4.

[0040] Furthermore, still based on Figure 4 As shown, the antenna structure also includes a tuning circuit 5, one end of which is grounded and the other end is electrically connected between the first combiner 2 and the first radiator 15. The tuning circuit 5 includes a tuning chip 51 and multiple tuning elements 52. The tuning chip 51 includes a multiplexer connected in series with each tuning element 52. By switching the on / off state of the multiplexer, various tuning states can be configured. By switching the tuning state of the tuning chip 51, the operating frequency band of the first radiator 15 can be switched, thereby achieving optimal matching for the operating frequency band of the first radiator 15 and greatly improving the performance of the multi-band radiating antenna.

[0041] In some other embodiments, it is still based on Figure 4As shown, the antenna structure also includes a second combiner 6 and a Bluetooth chip 7. The Bluetooth chip 7 has a fourth feed point 71, and the GPS chip 3 has a third feed point 32. The third feed point 32 and the fourth feed point 71 are connected in parallel to the second combiner 6, and are electrically connected to the second feed upper frame point 12 through the second combiner 6. Thus, the electrical signals fed in through the third feed point 32 and the fourth feed point 71 can excite the second radiator 16 to cover the second GPS frequency band and the Bluetooth frequency band, and the second combiner 6 connects to the second radiator 16, realizing the combined output of multi-band signals. Of course, in this embodiment, the Bluetooth chip 7 is used as an example, and it can be understood that the Bluetooth frequency band is the same as the Wi-Fi 2.4G frequency band. Therefore, the second radiator 16 can also be understood as covering the second GPS frequency band and the Wi-Fi 2.4G frequency band. Therefore, the fourth feed point 71 can also be set in the Wi-Fi chip, thereby exciting the second radiator 16 to cover the second GPS frequency band and the Wi-Fi 2.4G frequency band. While other radio frequency devices can certainly be set on the circuit between the second combiner 6 and the Bluetooth chip 7, in this embodiment, the first feed point 31 and the second feed point 32 of the GPS chip 3 can feed out GPS signals of different frequency bands, thereby stimulating the first radiator 15 and the second radiator 16 to cover different GPS frequency bands, realizing separate output between different GPS frequency bands, which is beneficial to improving the radiation performance of signals of different GPS frequency bands.

[0042] In the above embodiments, with Figure 1 As shown, the antenna structure also includes a first reserved grounding point 17 and a second reserved grounding point 18. The first reserved grounding point 17 is located near the first grounding point 13, and the second reserved grounding point 18 is located near the second grounding point 14. With this configuration, four groundable feed top frame points can be arranged through the first grounding point 13, the second grounding point 14, the first reserved grounding point 17, and the second reserved grounding point 18. Subsequently, a suitable feed top frame point can be selected for grounding to adjust the branch lengths of the first radiator 15 and the second radiator 16, thereby facilitating antenna matching and model design.

[0043] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0044] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. An antenna structure, characterized by include: A metal frame, the metal frame including a first power supply upper frame point, a second power supply upper frame point, a first grounding point and a second grounding point, the first grounding point being located between the first power supply upper frame point and the second power supply upper frame point; Along the first direction, a first radiator is formed by a branch between the first grounding point and the second grounding point. The first radiator covers the first frequency band, and the first feed frame point is located on the first radiator. Along the second direction, a second radiator is formed by a branch between the first grounding point and the second grounding point. The second radiator covers the second frequency band and the third frequency band. The second feed frame point is located on the second radiator. The first direction and the second direction are opposite.

2. The antenna structure of claim 1, wherein, include: First combiner; GPS chip, wherein the GPS chip is provided with a first power supply point; The cellular chip has a second feed point. The first feed and the second feed are connected in parallel to the first combiner and electrically connected to the upper frame point of the first feed through the first combiner.

3. The antenna structure of claim 2, wherein, The GPS chip includes a second combiner and has a third power supply point. The antenna structure also includes a Bluetooth chip or a Wi-Fi chip. The Bluetooth chip or Wi-Fi chip has a fourth feed point. The third feed point and the fourth feed point are connected in parallel to the second combiner and electrically connected to the upper feed point of the second feed frame via the second combiner.

4. The antenna structure of claim 1, wherein, The first radiator also covers the cellular frequency band.

5. The antenna structure of any one of claims 2 or 3, wherein, It also includes a tuning switch circuit, one end of which is grounded and the other end is electrically connected between the first combiner and the first radiator; The tuning switch circuit includes a tuning chip and tuning elements. The tuning chip includes a multiplexer connected in series with each tuning element. The tuning chip is used to switch the operating frequency band of the first radiator.

6. The antenna structure of claim 1, wherein, The first frequency band includes a first GPS frequency band, and the second frequency band includes a second GPS frequency band; and / or, The third frequency band includes the Bluetooth frequency band.

7. The antenna structure of claim 6, wherein, The first GPS frequency band includes the GPS L5 frequency band, and the second GPS frequency band includes the GPS L1 frequency band.

8. The antenna structure of claim 1, wherein, The metal frame is an annular metal frame, and the central angle formed by the first power supply upper frame point and the second power supply upper frame point is greater than 90° and less than or equal to 180°.

9. The antenna structure of claim 1, wherein, It also includes a first reserved grounding point and a second reserved grounding point, wherein the first reserved grounding point is set close to the first grounding point and the second reserved grounding point is set close to the second grounding point.

10. A wearable device, comprising: The antenna structure includes any one of claims 1-9.

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