Multi-antenna structure and mobile terminal

Abstract

The embodiment of the utility model discloses a multi-antenna structure and a mobile terminal, and relates to the technical field of vehicle-mounted wireless data communication. The multi-antenna structure comprises a PCB, a BLE board and two UWB antennas. The BLE antenna is arranged on the PCB; and the two UWB antennas are both arranged on the PCB. The multi-antenna structure adopts a structural form that the double UWB antennas and the BLE antenna are integrally arranged on the PCB, and the requirements of keyless entry, starting and living radar functions are met.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted wireless data communication, in particular to a multi-antenna structure and a mobile terminal. Background Art

[0002] With the continuous development of automobile intelligence and networking technology, the application scenarios of digital keys in automobiles are increasing. Based on two wireless communication methods, Bluetooth Low Energy (BLE) and Ultra Wideband (UWB), digital keys can achieve keyless entry and start. Further development, based on the UWB hardware of the digital key, the system can realize the function of living radar.

[0003] However, the realization of multiple functions of digital keys poses a huge challenge to antenna design. The antenna structure in the related art cannot combine the functions of multiple antennas and cannot simultaneously meet the keyless entry, start and living radar functions. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the purpose of the utility model is to provide a multi-antenna structure and a mobile terminal. The multi-antenna structure adopts a structural form in which dual UWB antennas and BLE antennas are integrated and arranged on a PCB board, thereby achieving keyless entry, start and living radar functions.

[0005] The utility model embodiment discloses a multi-antenna structure, which includes a PCB board, a BLE board and two UWB antennas; the BLE antenna is arranged on the PCB board; and the two UWB antennas are both arranged on the PCB board.

[0006] Furthermore, the two UWB antennas are arranged on the PCB board in the form of planar monopoles.

[0007] Furthermore, the BLE antenna is arranged on the PCB board in the form of a planar inverted F antenna.

[0008] Furthermore, two UWB antennas are arranged at the upper and lower ends of the same side of the PCB board, and the BLE antenna is arranged on the side of the other side of the PCB board.

[0009] Furthermore, there is an isolation ground plane between the two UWB antennas.

[0010] Furthermore, the two UWB antennas operate in a first frequency band and a second frequency band.

[0011] Furthermore, the first frequency band is 7.7 GHz-8.3 GHz, and the second frequency band is 6.2 GHz-6.8 GHz.

[0012] Furthermore, the BLE antenna operates at 2.4 GHz-2.5 GHz.

[0013] The embodiment of the utility model further discloses a mobile terminal, comprising the above-mentioned multi-antenna structure.

[0014] The multi-antenna structure provided by the utility model has the following beneficial effects, including but not limited to:

[0015] 1) The multi-antenna structure adopts a structure in which dual UWB antennas and BLE antennas are integrated and arranged on a PCB board, realizing keyless entry, start and living radar functions;

[0016] 2) In the multi-antenna structure, the arrangement of the BLE antenna and the UWB antenna has the advantages of wide bandwidth, easy integration and low cost, which solves the limitation of the circuit board size on the antenna performance and reduces the production cost;

[0017] 3) In the multi-antenna structure, the isolation ground plane disposed between the two UWB antennas can solve the isolation problem of the multi-antennas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] This specification will be further described in the form of exemplary embodiments, which will be described in detail by the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same number represents the same structure, wherein:

[0019] Figure 1 A schematic diagram of the structural layout of a multi-antenna structure provided in an embodiment of the utility model;

[0020] Figure 2 A curve diagram of simulation results of the dual ultra-wideband antenna transmission coefficient provided by an embodiment of the utility model;

[0021] Figure 3 A curve diagram of simulation results of the Bluetooth antenna transmission coefficient provided by an embodiment of the utility model;

[0022] Figure 4 A curve diagram of simulation results of the isolation of dual ultra-wideband antennas provided in an embodiment of the utility model.

[0023] Icon: 100-multi-antenna structure; 10-PCB board; 11-BLE antenna; 12-UWB antenna; 13-isolated ground plane. DETAILED DESCRIPTION

[0024] The following describes the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0025] It should be noted that the illustrations provided in the following embodiments are only used to schematically illustrate the basic concept of the present invention, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0026] Figure 1 Schematic diagram of the structural layout of the multi-antenna structure 100 provided in an embodiment of the present utility model. Figure 1 As shown, the utility model provides a multi-antenna structure 100 , which includes a PCB board 10 , a BLE board and two UWB antennas 12 ; the BLE antenna 11 is arranged on the PCB board 10 ; and the two UWB antennas 12 are both arranged on the PCB board 10 .

[0027] It is worth noting that the multi-antenna structure 100 adopts a structural form in which dual UWB antennas 12 and BLE antennas 11 are integrated and arranged on a PCB board 10, thereby achieving keyless entry, start and living radar functions.

[0028] In this embodiment, the two UWB antennas 12 are arranged on the PCB board 10 in the form of a planar monopole. It can be understood that the planar monopole antenna is usually a planar layout antenna form, and its radiating element is usually a planar conductive sheet or conductive plate, which can be rectangular, circular or other geometric shapes, and is placed on a planar substrate. By controlling the size and shape of the conductive sheet, the frequency response and radiation characteristics of the antenna can be adjusted to meet different application requirements. In the UWB frequency band, compared with spiral antennas, ceramic antennas, etc., monopole antennas have the advantages of easy miniaturization, wide bandwidth, easy integration, and low cost. In the case of limited clearance area and printed circuit board (PCB) area, the monopole antenna has the lowest cost and can ensure the antenna's bandwidth and other performance as much as possible.

[0029] In this embodiment, the BLE antenna 11 is arranged on the PCB board 10 in the form of a planar inverted F antenna. It can be understood that the planar inverted F antenna is usually composed of a conductive sheet and an antenna feeding part connected thereto. The conductive sheet is usually located on one side of the plane, and the feeding part is connected to the other side of the conductive sheet, usually at the bottom or side of the conductive sheet. In this embodiment, the BLE antenna 11 arranged in the form of a planar inverted F has the advantages of easy integration, large bandwidth, and low cost compared to Bluetooth band stereo antennas, monopole antennas, etc.

[0030] Please refer again Figure 1 The two UWB antennas 12 are arranged at the upper and lower ends of the same side of the PCB board 10, and the BLE antenna 11 is arranged on the side of the other side of the PCB board 10.

[0031] It is worth noting that placing the UWB antenna 12 at the upper and lower ends of the PCB board 10, and placing the BLE antenna 11 on the side of the other side, can reduce interference and coupling between different antennas, thereby improving the frequency band isolation performance between the antennas, avoiding mutual interference, and thus improving the performance and stability of the overall multi-antenna structure 100. In addition, the UWB antenna 12 usually requires a wider frequency band, and therefore requires a longer antenna length. By setting the two UWB antennas 12 at both ends of the PCB board 10, the length of the coaxial line between them can be reduced, thereby reducing the loss of the transmission line and improving the transmission efficiency. At the same time, the layout of the dual UWB antenna 12 effectively utilizes the space of the PCB board 10, making the antenna layout more compact and reducing production costs.

[0032] In this embodiment, an isolation ground plane 13 is provided between the two UWB antennas 12 .

[0033] It is worth mentioning that Figure 4 The simulation result curve of the dual ultra-wideband antenna isolation provided by the embodiment of the utility model. It can be seen from the figure that the isolation of the two UWB antennas 12 meets the requirements of living radar. That is, the multi-antenna structure 100 can effectively reduce the interference between the two UWB antennas 12 by setting the isolation ground plane 13, improve the performance stability and signal transmission quality of the system, and reduce the emission radiation of the system, thereby optimizing the performance and reliability of the overall system.

[0034] In this embodiment, the two UWB antennas 12 operate in a first frequency band and a second frequency band, wherein the first frequency band is 7.7 GHz-8.3 GHz (CH9 channel), and the second frequency band is 6.2 GHz-6.8 GHz (CH4 channel).

[0035] It is worth noting that the two UWB antennas 12 can fully utilize the spectrum resources of the two frequency bands by working simultaneously in two frequency bands, thereby improving the spectrum utilization of the system and facilitating the increase of the communication capacity and data transmission rate of the system. At the same time, this setting method can enhance the flexibility and applicability of the system, improve the anti-interference ability, and take advantage of multipath transmission. In this antenna structure, the broadband impedance control of the antenna can also be achieved by controlling the size of the feeder, and the antenna efficiency within the bandwidth can reach more than 80%.

[0036] In this embodiment, the BLE antenna 11 operates at 2.4 GHz-2.5 GHz.

[0037] Please refer to Figure 2 and Figure 3 ,Depend on Figure 2 and Figure 3 From the simulation results, we can see that: 1) The bandwidth of the UWB antenna 12 meets the 6.2-8.3GHz requirement, and the bandwidth of the BLE antenna 11 meets the 2.4-2.5GHz requirement. The reflection coefficient of the antenna meets the requirement of -10dB or less; 2) The isolation of the dual UWB antenna 12 meets the requirement of more than 20dB, achieving the requirement of living radar. Therefore, the multi-antenna structure 100 can realize the low-cost, high-performance digital key function, and realize keyless entry, start and living radar functions.

[0038] This embodiment also provides a mobile terminal, including the above-mentioned multi-antenna structure 100, having all its beneficial effects.

[0039] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

[0040] In the description herein, many specific details, such as examples of components and / or methods, are provided to provide a complete understanding of the embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more specific details or by other devices, systems, components, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of the embodiments of the present invention.

[0041] References throughout the specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the present invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the present invention described herein and shown may be based on the teachings herein and will be considered part of the spirit and scope of the present invention.

[0042] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0043] In addition, unless otherwise explicitly indicated, any marking arrows in the drawings should be regarded as exemplary only and not limiting. In addition, unless otherwise indicated, the term "or" used herein is generally intended to mean "and / or". In the case where the term is not clear because it is anticipated that the ability to separate or combine is provided, the combination of components or steps will also be regarded as indicated.

[0044] As used in the description herein and throughout the claims that follow, "a", "an", and "the" include plural references unless otherwise indicated. Likewise, as used in the description herein and throughout the claims that follow, the meaning of "in" includes "in" and "on" unless otherwise indicated.

[0045] The above description of the illustrated embodiments of the present invention (including the contents in the abstract of the specification) is not intended to be an exhaustive list or to limit the present invention to the precise form disclosed herein. Although specific embodiments of the present invention and examples of the present invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention as will be recognized and understood by those skilled in the art. As noted, these modifications may be made to the present invention in accordance with the above description of the embodiments of the present invention, and these modifications will be within the spirit and scope of the present invention.

[0046] Systems and methods have been generally described herein as details that are helpful for understanding the present invention. In addition, various specific details have been given to provide an overall understanding of the embodiments of the present invention. However, those skilled in the relevant art will recognize that the embodiments of the present invention can be practiced without one or more specific details, or practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid confusion with various aspects of the embodiments of the present invention.

Claims

1. A multi-antenna structure, characterized in that: include: PCB board; A BLE antenna is arranged on the PCB board; as well as Two UWB antennas, both arranged on the PCB board; The BLE antenna is arranged on the PCB board in the form of a planar inverted F antenna.

2. The multi-antenna structure according to claim 1, characterized in that: The two UWB antennas are both arranged on the PCB board in the form of planar monopoles.

3. The multi-antenna structure according to claim 1 or 2, characterized in that: The two UWB antennas are arranged at the upper and lower ends of the same side of the PCB board, and the BLE antenna is arranged on the side of the other side of the PCB board.

4. The multi-antenna structure according to claim 1, characterized in that: An isolation ground plane is provided between the two UWB antennas.

5. The multi-antenna structure according to claim 1, characterized in that: The two UWB antennas operate in a first frequency band and a second frequency band.

6. The multi-antenna structure according to claim 5, characterized in that: The first frequency band is 7.7 GHz-8.3 GHz, and the second frequency band is 6.2 GHz-6.8 GHz.

7. The multi-antenna structure according to claim 6, characterized in that: The BLE antenna operates at 2.4 GHz-2.5 GHz.

8. A mobile terminal, characterized in that: It comprises the multi-antenna structure as described in any one of claims 1-7.

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