WO2019085437A1

WO2019085437A1 - Antenna structure of unmanned aerial vehicle, and unmanned aerial vehicle

Info

Publication number: WO2019085437A1
Application number: PCT/CN2018/086900
Authority: WO
Inventors: 韩天天; 何其娟; 金传; 孙劲
Original assignee: 歌尔股份有限公司
Priority date: 2017-11-02
Filing date: 2018-05-15
Publication date: 2019-05-09
Also published as: CN207474669U

Abstract

An antenna structure of an unmanned aerial vehicle, and an unmanned aerial vehicle. The antenna structure comprises a circuit board (22) that is mounted in an inner cavity of a housing and is approximately parallel to a body (1), wherein the body (1) is electrically connected to a grounding portion of the circuit board (22); a feeding point (212) of a loop antenna (21) is connected to a feeding portion of the circuit board (22), and a grounding point (213) of the loop antenna (21) is connected to the grounding portion of the circuit board (22); the loop antenna (21) is disposed at a terminal position of the circuit board (22), and the loop antenna (21) and the circuit board (22) constitute a dipole antenna in a horizontal direction; or the circuit board (22) is located between the loop antenna (21) and the body (1), and the loop antenna (21) and the body (1) constitute a dipole antenna in a vertical direction. The antenna structure of the present invention has a wide antenna pattern lobe, satisfies the requirements of an unmanned aerial vehicle applying the antenna for a pattern, and ensures the signal reception and transmission capability of the unmanned aerial vehicle in different directions.

Description

Antenna structure and drone of a drone

Technical field

The present invention relates to the field of communication technologies for antennas, and more particularly to antenna structures on drones; the present invention also relates to a drone.

Background technique

With the development of information, electronics and other technologies, the performance of small and medium-sized unmanned aerial vehicles has been greatly improved, the application range has been gradually expanded, and the activity space has increased. This is the image, data transmission and reception monitoring and aircraft safety of unmanned aerial vehicles. Flight control has raised ever-increasing demands.

Since the data transmission and reception of the drone is completed by the wireless communication system, it is easily affected by the flight attitude and orientation during the flight. In order to ensure normal operation even when the shielding is severe and the equipment is tilted, the directionality of the antenna is especially important. .

Considering the influence of the shape on the flight performance of the drone, the size of the airborne antenna should be small and the weight should be light. The traditional UAV has a large antenna design pattern, large size, narrow radiation lobes, and is susceptible to metal around the antenna. The interference of the device causes the radiation pattern of the antenna to be spurred, which cannot meet the demand of the drone for the radiation pattern, and thus the transmission and reception capability of the drone is seriously reduced.

Summary of the invention

It is an object of the present invention to provide an antenna structure for a drone.

According to an aspect of the present invention, an antenna structure of a drone is provided, including a body and an antenna assembly mounted on the body, the antenna assembly including a housing mounted on the body, and being mounted in the housing cavity And a circuit board substantially parallel to the body, the circuit board is provided with a feeding portion and a grounding portion, the body is electrically connected to the grounding portion of the circuit board; and further comprising an inner wall of the casing a loop antenna, the feeding point of the loop antenna is connected to a feeding portion of the circuit board, and a grounding point of the loop antenna is connected to a grounding portion of the circuit board;

The loop antenna is disposed at a terminal position of the circuit board, and the loop antenna and the circuit board are configured to form a dipole antenna in a horizontal direction;

The circuit board is located between the antenna and the body, and the loop antenna and the body are configured to form a dipole antenna in a vertical direction.

Optionally, the loop antenna overlaps with an orthographic portion of the circuit board.

Optionally, the loop antenna is parallel to the circuit board.

Optionally, the size of the loop antenna is smaller than the size of the fuselage, and the antenna and the orthographic projection of the fuselage completely overlap.

Optionally, the loop antennas are relatively distributed in a central region of the fuselage.

Optionally, the housing is mounted on the top of the fuselage.

Optionally, the housing includes a bottom case and a cover, and the loop antenna is disposed on an inner wall of the cover.

Optionally, the cover body has a trapezoidal cross section, and the loop antenna has a C-shape, and includes two extensions extending on opposite side walls of the cover body, and is disposed on the end surface of the cover body and two A joint where the same ends of the extensions are joined together.

Optionally, the loop antenna is an FPC antenna, an LDS antenna or a ram antenna.

According to another aspect of the present invention, there is also provided a drone comprising the antenna structure described above.

According to the antenna structure of the invention, the body of the whole drone can be used as part of the antenna to participate in the radiation, thereby effectively reducing the interference of the large metal device in the drone on the performance of the antenna. Moreover, the design structure of the antenna has the characteristics of a dual-polarized antenna, and the antenna pattern has a wide lobe, which satisfies the requirements of the UAV applying the antenna to the direction diagram, and ensures the signal transmission and reception capability of the UAV in different directions.

Other features and advantages of the present invention will become apparent from the Detailed Description of the <RTIgt;

DRAWINGS

The accompanying drawings, which are incorporated in FIG

1 is a schematic view showing the structure of a drone of the present invention.

2 is a schematic view showing the structure of a cover body and an antenna of the present invention.

3 is a schematic diagram of a dipole antenna formed by an antenna and a circuit board.

4 is a schematic diagram of a dipole antenna formed by an antenna and a body.

Figure 5 is a radiation pattern in the horizontal direction of Figure 4.

Figure 6 is a radiation pattern in the vertical direction of Figure 3.

Detailed ways

Various exemplary embodiments of the present invention will now be described in detail with reference to the drawings. It should be noted that the relative arrangement of the components and steps, numerical expressions and numerical values set forth in the embodiments are not intended to limit the scope of the invention unless otherwise specified.

The following description of the at least one exemplary embodiment is merely illustrative and is in no way

Techniques and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques and devices should be considered as part of the specification.

In all of the examples shown and discussed herein, any specific values are to be construed as illustrative only and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

It should be noted that similar reference numerals and letters indicate similar items in the following figures, and therefore, once an item is defined in one figure, it is not required to be further discussed in the subsequent figures.

The invention provides an antenna structure of a drone, which has simple implementation method, good effect and wide beam pattern of the direction, optimizes the signal receiving effect of the drone in different directions, and ensures the signal transmission and reception of the drone in different directions. ability.

Referring to FIG. 1, the antenna structure of the present invention includes a body 1 and an antenna assembly 2 mounted on the body 1. The antenna assembly 2 can be mounted on the top or bottom of the fuselage 1 in a manner well known to those skilled in the art.

In a specific embodiment of the invention, the antenna assembly 2 includes a housing that is mounted on the top of the fuselage, the housing preferably including a bottom case that is snapped together (not shown) and a cover 20, with reference to FIG. figure 2. After the bottom case and the cover body 20 are fastened together, a housing that can be assembled on the body 1 is formed. A circuit board 22 is disposed in the inner cavity of the housing, which is approximately parallel to the top end surface of the body 1. The circuit board 22 is provided with a feeding portion and a grounding portion. The grounding portion is electrically connected to the body 1, for example, The wires are electrically connected together so that the entire body 1 can be used as a ground.

The antenna assembly 2 of the present invention further includes a loop antenna 21 located within the housing that can be attached to the inner wall of the cover 20. The loop antenna 21 may be an FPC antenna, an LDS antenna, a ram antenna or the like which is well known to those skilled in the art.

For example, when the loop antenna 21 employs an FPC antenna or a ram antenna, the loop antenna 21 can be directly attached to the inner wall of the cover body 20 by means of a glue material, a fixing post or a manner well known to those skilled in the art. When the loop antenna 21 uses an LDS antenna, the loop antenna 21 can be formed on the inner wall of the cover 20 by the LDS technique, which will not be specifically described herein.

In a preferred embodiment of the present invention, the cover body 20 has a trapezoidal structure in cross section, and the loop antenna 21 has a C-shape, and includes two extending portions 211 extending on opposite side walls of the cover body 20, and is disposed on the cover. A connecting portion 210 on the end face of the body 20 and connecting the same ends of the two extending portions 211 together. The two extensions 211 and the connection portion 210 form a loop antenna 21 of a C-shaped structure. A feed point 212 of the loop antenna 21 and a ground point 213 are formed at the free ends of the two extensions 211, respectively. The feed point 212 and the ground point 213 extend from the position of the cover 20 toward the circuit board 22, so that the feed point 212 of the loop antenna 21 can be soldered to the feed portion of the circuit board 22, and the loop antenna 21 is connected. The location 213 is soldered to the ground of the circuit board 22.

The distance between the loop antenna 21 and the circuit board 22 is preferably greater than 3 mm, which can improve the antenna performance, so that the antenna performance is better. The loop antenna 21 is disposed at the end position of the circuit board 22. At this time, the circuit board 22 can serve as the ground end of the antenna, so that the loop antenna 21 and the circuit board 22 can be configured to form a dipole antenna in the horizontal direction, refer to FIG. . At this time, the radiation direction in the vertical direction is approximately omnidirectional radiation, see FIG.

In this embodiment, the loop antenna 21 is entirely parallel to the circuit board 22, so that its omnidirectional view in the vertical direction is better. However, due to the limitation of the structure, the loop antenna 21 can also form a certain angle with respect to the circuit board 22. The larger the angle, the worse the omnidirectional pattern in the vertical direction. Those skilled in the art can select the appropriate angle between the loop antenna 21 and the circuit board 22 according to the principle and its actual needs.

The antenna 21 of the present invention is preferably completely offset from the circuit board 22. In this case, its omnidirectional view in the vertical direction is optimal. However, due to the limitation of the structure, the loop antenna 21 and the orthographic projection of the circuit board 22 may be overlapped. In this case, the omnidirectional diagram in the vertical direction is better than the omnidirectional diagram of the structurally symmetric dipole antenna, but not Affect the actual application.

At the same time, the circuit board 22 is located between the loop antenna 21 and the body 1, such that the loop antenna 21 and the body 1 are separated by a certain distance, and the body 1 passes through the ground portion of the circuit board 22 and the loop antenna 21. The grounding point is turned on, which allows the body 1 to be used as an antenna, so that the loop antenna 21 and the body 1 can be configured to constitute a dipole antenna in the vertical direction, with reference to FIG. At this time, the radiation direction in the horizontal direction is approximately omnidirectional radiation, refer to FIG. 5.

In principle, the more symmetrical the loop antenna 21 is to the fuselage 1, the better its omnidirectional pattern in the horizontal direction. However, due to the limitation of the structure, for example, the size of the loop antenna 21 can be made smaller than the size of the body 1 without affecting the practical application, and the orthographic projection of the loop antenna 21 and the body 1 completely overlaps. It is further preferred that the loop antenna 21 can be disposed in the central portion of the body 1 such that the effect of omnidirectional radiation is better.

The antenna structure of the present invention can be applied to a drone. To this end, the present invention also provides a drone comprising the antenna structure described above. The camera unit 3 can also be disposed at the upper end of the UAV body 1. The image taken by the camera unit 3 can be transmitted to the ground through the antenna structure, and the ground unit can be controlled by the antenna structure. No longer specified.

While the invention has been described in detail with reference to the preferred embodiments of the present invention, it is understood that It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

An antenna structure of a drone, comprising: a body and an antenna assembly mounted on the body, the antenna assembly comprising a housing mounted on the body, and being mounted in the cavity of the housing and coupled to the machine An approximately parallel circuit board, the circuit board is provided with a feeding portion and a grounding portion, the body is electrically connected to the grounding portion of the circuit board; and the loop antenna is attached to the inner wall of the housing, a feeding point of the loop antenna is connected to a feeding portion of the circuit board, and a grounding point of the loop antenna is connected to a grounding portion of the circuit board;

The loop antenna is disposed at a terminal position of the circuit board, and the loop antenna and the circuit board are configured to form a dipole antenna in a horizontal direction;

The circuit board is located between the antenna and the body, and the loop antenna and the body are configured to form a dipole antenna in a vertical direction.
The antenna structure of claim 1 wherein said loop antenna overlaps an orthographic portion of the circuit board.
The antenna structure according to claim 1 or 2, wherein the loop antenna is parallel to the circuit board.
The antenna structure according to claim 1 or 3, wherein the size of the loop antenna is smaller than the size of the body, and the antenna and the orthographic projection of the body are completely overlapped.
The antenna structure according to claim 4, wherein said loop antenna is relatively distributed in a central portion of the body.
The antenna structure according to any one of claims 1 to 5, characterized in that the casing is mounted on the top of the fuselage.
The antenna structure according to claim 6, wherein said housing comprises a bottom case and a cover, and said loop antenna is disposed on an inner wall of said cover.
The antenna structure according to claim 7, wherein the cover body has a trapezoidal cross section, and the loop antenna has a C-shape, and includes two extension portions extending on opposite side walls of the cover body, and A connection portion provided on the end face of the cover and connecting the same ends of the two extensions together.
The antenna structure according to any one of claims 1 to 8, characterized in that the loop antenna is an FPC antenna, an LDS antenna or a ram antenna.
A drone characterized by comprising the antenna structure according to any one of claims 1 to 9.