Circularly polarized antenna and smart wearable device thereof

Abstract

The utility model relates to a circular polarization antenna, including mainboard, PDS antenna and metal watchglass, the mainboard and metal watchglass parallelly arranged, PDS antenna installs on the mainboard and PDS antenna is located between the mainboard and metal watchglass, PDS antenna and metal watchglass keep preset distance, PDS antenna is preset length, the utility model discloses PDS antenna and metal watchglass keep preset distance, PDS antenna designs as preset length, through the size of the rectification metal watchglass and PDS antenna coupling, to reduce PDS antenna area, form circular polarization antenna, realize accurate positioning.

Description

Technical Field

[0001] This utility model relates to the field of circularly polarized antenna technology, and in particular to a circularly polarized antenna and its smart wearable device. Background Technology

[0002] With the development of smart terminals (such as mobile phones, wearable devices, computers, etc.), satellite positioning has become one of their main functions. To achieve satellite positioning and trajectory recording, satellite positioning antennas are essential. To enhance the transmission efficiency from satellite to the ground (e.g., improving penetration and coverage), the satellite's transmitting antenna to the ground uses circular polarization. Similarly, to enhance the receiving capability of the positioning antenna, the receiving antenna of the terminal device should also use the same circular polarization antenna as the transmitting antenna.

[0003] However, due to limitations in size or industrial design, smart terminals often cannot implement circularly polarized antennas and instead commonly use linearly polarized antennas, which results in poor satellite positioning performance for smart terminals.

[0004] Chinese patent application CN114069216A discloses a circularly polarized antenna and a positioning terminal. The circularly polarized antenna includes: a circularly polarized antenna assembly, at least two metal substrates fixedly arranged from top to bottom, and at least two choke rings sequentially nested from the outside in, with one metal substrate corresponding to one choke ring. The inner choke ring is electrically connected to the upper metal substrate, and the outer choke ring surrounds the inner choke ring and is electrically connected to the lower metal substrate. The vertical height of the outer choke ring is higher than that of the inner choke ring. The circularly polarized antenna assembly is disposed within the area enclosed by the innermost choke ring and is used for transmitting and receiving electromagnetic wave signals. This patent does not reduce the space required for antenna use.

[0005] Therefore, providing a circularly polarized antenna that utilizes a metal bezel to couple with the antenna within a limited antenna space to reduce the antenna's usable space is an urgent problem to be solved. Utility Model Content

[0006] The purpose of this invention is to overcome the defects of the prior art and provide a circularly polarized antenna and its intelligent wearable device.

[0007] The objective of this utility model can be achieved through the following technical solutions:

[0008] According to one aspect of the present invention, a circularly polarized antenna is provided, comprising a main board, a PDS antenna, and a metal bezel, wherein the main board and the metal bezel are arranged in parallel, the PDS antenna is mounted on the main board and located between the main board and the metal bezel, the PDS antenna and the metal bezel maintain a preset distance, and the PDS antenna has a preset length.

[0009] As a preferred technical solution, the PDS antenna includes a feed end, a ground end, and a transmitting end. The feed end and the ground end are both mounted on the edge of the motherboard, and the transmitting end is connected to the feed end and the ground end respectively.

[0010] As a preferred technical solution, both the feed terminal and the ground terminal are perpendicular to the transmitting terminal, and the transmitting terminal is parallel to the motherboard or metal bezel.

[0011] As a preferred technical solution, the transmitting end maintains a preset distance from the metal bezel, and the transmitting end maintains a preset length.

[0012] As a preferred technical solution, the preset distance and preset length are determined based on the materials of the feed end, the ground end, and the transmitter end.

[0013] As a preferred technical solution, the metal bezel is a circular ring, and the transmitting end is an arc strip, the curvature of the arc strip being the same as the curvature of the circular ring.

[0014] As a preferred technical solution, the metal bezel and the PDS antenna maintain the same resonant frequency.

[0015] As a preferred technical solution, the metal bezel and the PDS antenna maintain a 90° phase difference.

[0016] As a preferred technical solution, the PDS antenna is a PDS antenna manufactured using PDS printing technology.

[0017] According to another aspect of the present invention, a smart wearable device is provided, the device employing any of the circularly polarized antennas described above.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This utility model maintains a preset distance between the PDS antenna and the metal bezel. The PDS antenna is designed with a preset length. By modifying the size of the metal bezel and coupling it with the PDS antenna, the area of ​​the PDS antenna is reduced, forming a circularly polarized antenna, thereby achieving precise positioning.

[0020] 2. The preset distance and preset length of this utility model are determined according to the materials of the feed end, ground end and transmitter end. The distance and length are adjusted in a timely manner according to the corresponding materials to provide data transmission quality.

[0021] 3. The metal bezel and PDS antenna of this utility model maintain the same resonant frequency, so that the metal bezel and PDS antenna maintain a 90° phase difference, thereby achieving GPS circular polarization function.

[0022] 4. The curvature of the arc strip in this utility model is the same as that of the ring, which improves the antenna directivity and enhances the consumer experience.

[0023] 5. This utility model uses PDS printing technology to reduce subsequent mounting processes, avoids the problem of overall consistency caused by manual labor, and makes the antenna more three-dimensional, reducing the difficulty of manufacturing and the defect rate, thus improving cost advantages. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] 1. Mainboard; 21. Feed terminal; 22. Ground terminal; 23. Transmitter terminal; 3. Metal bezel. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model.

[0027] This application provides a circularly polarized antenna and a smart terminal, which can solve the problem of poor satellite positioning performance caused by using linearly polarized antennas in terminal devices. To adapt to the ever-changing market, terminal devices are becoming smaller and more diverse in shape, resulting in increasingly limited and unsuitable antenna space, failing to meet antenna clearance design requirements and leading to declining performance. Using FPC technology can easily cause inconsistencies in the post-assembly stage, while LDS technology has a high defect rate and excessively high material costs, offering no advantages.

[0028] The antenna designed in this application can reduce the antenna's usable space (area) by using a metal bezel to couple with the antenna within a limited antenna space, thus meeting the performance standard requirements. In addition, the use of PDS process can effectively ensure product assembly consistency, reduce defect rate, and save costs.

[0029] Example 1

[0030] like Figure 1 As shown, a circularly polarized antenna includes a main board 1, a PDS antenna, and a metal bezel 3. The main board 1 and the metal bezel 3 are arranged in parallel. The PDS antenna is mounted on the main board 1 and is located between the main board 1 and the metal bezel 3. The PDS antenna and the metal bezel 3 maintain a preset distance. The PDS antenna has a preset length.

[0031] In this embodiment, PDS (Printed Distribution System) printing technology is a technique for creating electronic circuits or radio frequency (RF) distribution systems by printing conductive materials. It is widely used in flexible electronics, the Internet of Things, and wireless communication. Its core is to form conductive patterns on a substrate using printing methods, replacing traditional etching processes. This offers advantages such as low cost, flexibility, and the ability to be mass-produced.

[0032] Feed system (21) refers to the power supply system, which is the cable, conductor, or other related equipment connecting the transmitter or receiver to the antenna. It transmits the radio frequency (RF) current generated by the transmitter to the antenna, or the RF current received by the antenna to the receiver. For efficient RF current transmission, feed lines typically use special types of cables, such as transmission lines; waveguides are also commonly used at microwave frequencies. Furthermore, the power supply system may include an antenna tuning unit or matching network to achieve impedance matching between the antenna, feed line, and transmitter or receiver.

[0033] This application optimizes GPS circular polarization performance by controlling the spacing between the PDS antenna and the metal bezel 3, the length of the PDS antenna, and adjusting the matching network; and achieves circular polarization using a metal decorative part (metal bezel 3) and a small portion of PDS traces (PDS antenna).

[0034] The PDS antenna includes a feed terminal 21, a ground terminal 22, and a transmitter terminal 23. The feed terminal 21 and ground terminal 22 are both mounted on the edge of the main board 1. The transmitter terminal 23 is connected to both the feed terminal 21 and the ground terminal 22. The feed terminal 21 and ground terminal 22 are perpendicular to the transmitter terminal 23, and the transmitter terminal 23 is parallel to the main board 1 or the metal bezel 3. The transmitter terminal 23 maintains a preset distance from the metal bezel 3 and a preset length. The preset distance and preset length are determined based on the materials of the feed terminal 21, ground terminal 22, and transmitter terminal 23.

[0035] In this embodiment, the length of the PDS antenna and the distance between it and the metal bezel 3 will vary depending on the material composition of the PDS antenna's frame. When the frame material is PC (polycarbonate) + 20% glass fiber, the distance between the PDS antenna and the metal bezel 3 is set to 2-5mm, the length of the PDS antenna is set to 20-30mm, and the width of the PDS antenna is set to 3-10mm.

[0036] The metal bezel 3 is a circular ring, and the transmitting end 23 is an arc strip. The curvature of the arc strip is the same as that of the circular ring. The fact that the metal bezel 3 is a circular ring and that the curvature is the same means that the trajectory of the PDS antenna is the same as that of the circular ring, thus achieving alignment between the metal bezel 3 and the PDS antenna.

[0037] The metal bezel 3 and the PDS antenna maintain the same resonant frequency. The metal bezel 3 and the PDS antenna maintain a 90° phase difference. The PDS antenna is a PDS antenna manufactured using PDS printing technology.

[0038] In this embodiment, the self-resonance of the metal bezel 3 is controlled around 1575MHz, while the PDS antenna is tuned to resonate at 1575MHz, resulting in a 90° phase difference between the two resonators, thus achieving GPS circular polarization. The metal bezel 3 is incorporated into the antenna, reducing the PDS trace area. The PDS printing process reduces subsequent mounting processes, decreases manufacturing difficulty and defect rate, enhances cost advantages, addresses the consistency issues caused by human error, and makes the antenna more three-dimensional, improving antenna directivity and enhancing the consumer experience.

[0039] In addition, this utility model also provides a smart wearable device, which uses the above-mentioned circularly polarized antenna.

[0040] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A circularly polarized antenna, characterized in that, It includes a motherboard (1), a PDS antenna and a metal bezel (3). The motherboard (1) and the metal bezel (3) are arranged in parallel. The PDS antenna is mounted on the motherboard (1) and is located between the motherboard (1) and the metal bezel (3). The PDS antenna and the metal bezel (3) maintain a preset distance. The PDS antenna has a preset length.

2. A circularly polarized antenna according to claim 1, characterized in that, The PDS antenna includes a feed end (21), a ground end (22) and a transmitter end (23). The feed end (21) and the ground end (22) are both mounted on the edge of the motherboard (1). The transmitter end (23) is connected to the feed end (21) and the ground end (22) respectively.

3. A circularly polarized antenna according to claim 2, characterized in that, The Feed terminal (21) and the ground terminal (22) are both perpendicular to the transmitter terminal (23), and the transmitter terminal (23) is parallel to the motherboard (1) or the metal bezel (3).

4. A circularly polarized antenna according to claim 2, characterized in that, The transmitter (23) maintains a preset distance from the metal bezel (3), and the transmitter (23) maintains a preset length.

5. A circularly polarized antenna according to claim 4, characterized in that, The preset distance and preset length are determined based on the materials of the feed end (21), the ground end (22), and the transmitter end (23).

6. A circularly polarized antenna according to claim 2, characterized in that, The metal bezel (3) is a circular ring, and the transmitting end (23) is an arc strip, the curvature of which is the same as that of the circular ring.

7. A circularly polarized antenna according to claim 1, characterized in that, The metal bezel (3) and the PDS antenna maintain the same resonant frequency.

8. A circularly polarized antenna according to claim 7, characterized in that, The metal bezel (3) and the PDS antenna maintain a 90° phase difference.

9. A circularly polarized antenna according to claim 1, characterized in that, The PDS antenna is a PDS antenna manufactured using PDS printing technology.

10. A smart wearable device, characterized in that, The device employs a circularly polarized antenna as described in any one of claims 1-9.

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