WO2021104012A1

WO2021104012A1 - Antenna and aircraft

Info

Publication number: WO2021104012A1
Application number: PCT/CN2020/127932
Authority: WO
Inventors: 谭杰洪
Original assignee: 深圳市道通智能航空技术股份有限公司
Priority date: 2019-11-27
Filing date: 2020-11-11
Publication date: 2021-06-03

Abstract

Disclosed are an antenna and an aircraft. The antenna comprises a substrate, a circuit board disposed on the substrate, a first radiation part disposed on one side of the substrate, and a second radiation part disposed on the other side of the substrate. The first radiation part is provided with a feed point, and the first radiation part is electrically connected to the circuit board by means of the feed point. The second radiation part is provided with a grounding point, and the second radiation part is electrically connected to the circuit board by means of the grounding point. In the present invention, the circuit board and the antenna are integrally designed, the structure of the antenna is simplified, and the volume of the antenna is reduced, which can achieve the omnidirectional uniform radiation of the antenna.

Description

Antenna and aircraft

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on November 27, 2019, with application number 201922078759.2 and application titled "An Antenna and Aircraft", the entire content of which is incorporated into this application by reference.

Technical field

The present invention relates to the field of communication, in particular to an antenna and an aircraft.

Background technique

At present, antennas are an important element in the field of wireless communication. With the development of drones, large-size antennas occupy a larger space and are inconvenient to install. The antennas used by drones need to meet the characteristics of small size and uniform omnidirectional radiation.

Summary of the invention

In order to overcome the problem of the large size of the antenna in the prior art, the purpose of the present invention is to provide an antenna and an aircraft to reduce the size of the antenna and achieve uniform omnidirectional radiation.

In order to achieve the above objective, the present invention provides an antenna including a substrate, a circuit board provided on the substrate, a first radiation portion provided on one side of the substrate, and a second radiation portion provided on the other side of the substrate. Part; the first radiating part is provided with a feeding point, the first radiating part is electrically connected to the circuit board through the feeding point; the second radiating part is provided with a grounding point, the first The two radiating parts are electrically connected to the circuit board through the ground point.

Further, the first radiating part includes a first transmission line, a first connecting arm connected to an end of the first transmission line away from the circuit board in the middle, and an end connected to the first connecting arm and facing the circuit board A first vibrator arm extending on one side of the first connecting arm and a second vibrator arm extending toward one side of the circuit board connected to the other end of the first connecting arm, and the feeding point is provided on the first transmission line.

Further, the first transmission line includes an extension part and a feeding part connected to the extension part, the feeding point is provided at an end of the feeding part away from the extension part, and the feeding part is far away One end of the extension part is pointed.

Further, the first vibrator arm and the second vibrator arm are symmetrically arranged with respect to the first transmission line.

Further, the distance between the first dipole arm and the circuit board is 1/16 to 1 of the resonant wavelength of the antenna, and the distance between the second dipole arm and the circuit board is the 1/16 to 1 of the resonant wavelength of the antenna.

Further, the second radiating portion includes a second transmission line, a second connecting arm at an end of the second transmission line away from the circuit board in the middle, and an end connected to the second connecting arm and facing away from the circuit. A third vibrator arm extending from one side of the board and a fourth vibrator arm connected to the other end of the second connecting arm and extending toward the side away from the circuit board, the grounding point is set on the second transmission line on.

Further, the second radiating portion further includes a fifth dipole arm connected to an end of the third dipole arm away from the second connecting arm and extending toward the side of the fourth dipole arm, and connected to The sixth vibrator arm extending from one end of the fourth vibrator arm away from the second connecting arm and toward the side of the third vibrator arm.

Further, the third vibrator arm and the fourth vibrator arm are arranged symmetrically with respect to a line where the midpoint of the ground point and the midpoint of the second connecting arm are located.

Further, the antenna further includes a first shielding plate arranged on one side of the circuit board and a second shielding plate arranged on the other side of the circuit board.

The present invention also provides an aircraft including a fuselage, a landing gear arranged below the fuselage, and the above-mentioned antenna, and the antenna is arranged in the landing gear.

Compared with the prior art, the beneficial effect of the present invention is that by providing a circuit board on a substrate, a first radiation portion and a second radiation portion are respectively provided on both sides of the substrate, and the first radiation portion is electrically connected to the circuit board through the feeding point. Connected, the second radiating part is electrically connected to the circuit board through the grounding point, the circuit board and the antenna are integrated design, the antenna structure is simplified, the antenna volume is reduced, and the omnidirectional uniform radiation of the antenna can be realized.

Description of the drawings

FIG. 1 is a schematic diagram of the front structure of an antenna provided by an embodiment of the present invention;

2 is a schematic diagram of the back structure of the antenna provided by the first embodiment of the present invention;

3 is a schematic diagram of the rear structure of the antenna of the first embodiment of the second embodiment of the present invention;

4 is a schematic diagram of the rear structure of the antenna of the second embodiment of the second embodiment of the present invention;

5 is a schematic diagram of the back structure of the antenna of the third embodiment of the second embodiment of the present invention;

FIG. 6 is a diagram of S parameters of an antenna provided by an embodiment of the present invention;

FIG. 7 is a directional diagram of an antenna provided by an embodiment of the present invention;

Fig. 8 is a schematic diagram of an aircraft provided by an embodiment of the present invention.

In the figure: 10. Antenna; 1. Substrate; 2. Circuit board; 3. First radiating part; 31. Feeding point; 32. First transmission line; 321. Extension; 322. Feeding part; 33. First 34, the first vibrator arm; 35, the second vibrator arm; 4. the second radiating part; 41, the ground point; 42, the second transmission line; 43, the second connecting arm; 44, the third vibrator arm; 45. The fourth oscillator arm; 46. The fifth oscillator arm; 47. The sixth oscillator arm; 48. Radiation sheet; 5. The first shielding plate; 6. The second shielding plate; 20. The fuselage; 30. Landing gear.

Detailed ways

In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is expressed as being "fixed to" another element, it can be directly on the other element, or there may be one or more elements in between. When an element is said to be "connected" to another element, it can be directly connected to the other element, or there may be one or more intervening elements in between. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the specification of the present invention in this specification are only for the purpose of describing specific embodiments, and are not used to limit the present invention. The term "and/or" used in this specification includes any and all combinations of one or more related listed items.

In the following, the present invention will be further described with reference to the drawings and specific implementations. It should be noted that, provided that there is no conflict, the following embodiments or technical features can be combined to form new embodiments. .

As shown in Figures 1-2, the antenna 10 provided by the embodiment of the present invention includes a substrate 1, a circuit board 2 provided on the substrate 1, a first radiating portion 3 provided on one side of the substrate 1, and another The second radiating part 4 on the side; the first radiating part 3 is provided with a feeding point 31, and the first radiating part 3 is electrically connected to the circuit board 2 through the feeding point 31; the second radiating part 4 is provided with a grounding point 41, The second radiating part 4 is electrically connected to the circuit board 2 through the ground point 41. The circuit board 2, the first radiating part 3, and the second radiating part 4 are integrated to design, simplify the structure of the antenna 10, reduce the size of the antenna 10, and realize the omnidirectional uniform radiation of the antenna.

As shown in FIG. 1, the first radiating part 3 includes a first transmission line 32, a first connecting arm 33 connected to the first transmission line 32 at an end away from the circuit board 2 in the middle, and an end connected to the first connecting arm 33 and facing the circuit board 2. A first vibrator arm 34 extending on one side of the first connecting arm 33 and a second vibrator arm 35 extending toward one side of the circuit board 2 connected to the other end of the first connecting arm 33, and the feeding point 31 is provided on the first transmission line 32. Preferably, the first transmission line 32 includes an extension portion 321 and a feeding portion 322 connected to the extension portion 321. The feeding point 31 is provided at an end of the feeding portion 322 away from the extension portion 321, and the feeding portion 322 is away from the extension portion 321. One end is pointed. Specifically, the feeding point 31 is provided at the tip of the feeding portion 322, and the tip of the feeding portion 322 is electrically connected to the circuit board 2 to realize feeding.

In one embodiment, the first transmission line 32 is disposed at the center line of the substrate 1, and the first dipole arm 34 and the second dipole arm 35 are symmetrically disposed with respect to the first transmission line 32. The size of the first dipole arm 34 and the second dipole arm 35 is 1/8 to 3/4 of the antenna resonance wavelength. The distance between the first dipole arm 34 and the circuit board 2 is 1/16 to 1 of the resonant wavelength of the antenna, and the distance between the second dipole arm 35 and the circuit board 2 is 1/16 to 1 of the resonant wavelength of the antenna.

As shown in FIG. 2, in the first embodiment, the second radiating part 4 includes a second transmission line 42, a second connecting arm 43 at an end far away from the circuit board 2 connected to the second transmission line 42 in the middle, and connected to the second connecting arm 43 one end and the third vibrator arm 44 extending toward the side away from the circuit board 2 and the fourth vibrator arm 45 connected to the other end of the second connecting arm 43 and extending toward the side away from the circuit board 2, the ground point 41 is set On the second transmission line 42. Specifically, the ground point 41 is provided at an end of the second transmission line 42 away from the second connecting arm 43, and the end of the second transmission line 42 is soldered to the circuit board 2. In one embodiment, the second connecting arm 43 and the first connecting arm 33 are respectively arranged on both sides of the substrate 1 and arranged symmetrically with respect to the substrate 1. In another embodiment, the width of the second connecting arm 43 and the first connecting arm 33 may also be different.

In one embodiment, the second radiating part 4 further includes a fifth dipole arm 46 connected to the end of the third dipole arm 44 away from the second connecting arm 43 and extending toward the side of the fourth dipole arm 45, and a connection At the end of the fourth vibrator arm 45 away from the second connecting arm 43 and the sixth vibrator arm 47 extending toward the side of the third vibrator arm 44, the fifth vibrator arm 46 and the sixth vibrator arm 47 are centered about the ground point 41 The point is symmetrically arranged with the line where the midpoint of the second connecting arm 43 is located.

In an embodiment, the third vibrator arm 44 and the fourth vibrator arm 45 are arranged symmetrically with respect to a line where the midpoint of the ground point 41 and the midpoint of the second connecting arm 43 are located. The size of the third dipole arm 44 and the fourth dipole arm 45 is 1/8 to 3/4 of the resonant wavelength of the antenna.

As shown in FIG. 3, in the second embodiment, the second radiating part 4 includes a second transmission line 42 and a radiating sheet 48 connected to an end of the second transmission line 42 away from the circuit board 2. As shown in FIG. 3, in the first embodiment, the shape of the radiation sheet 48 is rectangular. As shown in FIG. 4, in the second embodiment, the shape of the radiation sheet 48 is a trapezoid. As shown in FIG. 5, in the third embodiment, the shape of the radiation sheet 48 is an ellipse.

Preferably, the antenna 10 further includes a first shielding plate 5 arranged on one side of the circuit board 2 and a second shielding plate 6 arranged on the other side of the circuit board 2 to effectively reduce signal interference between the antenna 10 and other circuit modules.

As shown in FIG. 6, it is the S parameter diagram of the antenna 10. It can be seen that the antenna can achieve omnidirectional coverage at 5.5 GHz, and the maximum antenna radiation direction is in the horizontal direction.

As shown in Figure 7, it is the antenna pattern at 5.5GHz, and it can be seen that the antenna achieves omnidirectional coverage at 5.5GHz.

As shown in FIG. 8, the aircraft provided by the embodiment of the present invention includes a fuselage 20, a landing gear 30 provided under the fuselage 20, and the aforementioned antenna 10, and the antenna 10 is provided in the landing gear 30. Wherein, the antenna 10 is placed perpendicular to the body 20.

In this embodiment, the bottom view of the aircraft is taken as an example to schematically show the installation position of the antenna 10. The installation position of the antenna 10 in this embodiment is not limited to the installation position shown in FIG. The installation position of the antenna 10 for signal transmission and reception may also be used.

The antenna 10 provided in the landing gear 30 of the aircraft broadens the wave width of the antenna 10 on the elevation plane, and the signal remains stable when the antenna is tilted. This reduces the influence of the aircraft's flight posture on communication during the flight process, and guarantees the communication of the aircraft during the flight.

In the antenna 10 and the aircraft provided by the embodiment of the present invention, the circuit board 2 is provided on the substrate 1, and the first radiating part 3 and the second radiating part 4 are respectively provided on both sides of the substrate 1, and the first radiating part 3 passes through the feeding point. 31 is electrically connected to the circuit board 2, and the second radiating part 4 is electrically connected to the circuit board 2 through the grounding point 41. The circuit board 2 and the antenna 10 are designed integrally, which simplifies the antenna structure, reduces the antenna volume, and can realize the full antenna To uniform radiation.

The foregoing embodiments are only preferred embodiments of the present invention, and cannot be used to limit the scope of protection of the present invention. Any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention belong to the present invention. The scope of protection required.

Claims

An antenna, characterized by comprising a substrate, a circuit board provided on the substrate, a first radiation portion provided on one side of the substrate, and a second radiation portion provided on the other side of the substrate; A feeding point is provided on the first radiating part, and the first radiating part is electrically connected to the circuit board through the feeding point; a grounding point is provided on the second radiating part, and the second radiating part passes through The ground point is electrically connected to the circuit board.
The antenna according to claim 1, wherein the first radiating part comprises a first transmission line, a first connecting arm at an end far away from the circuit board that is connected to the first transmission line in the middle, and is connected to the first transmission line. A first vibrator arm extending toward one side of the circuit board at one end of the connecting arm, and a second vibrator arm extending toward the side of the circuit board connected to the other end of the first connecting arm, the feeder The point is set on the first transmission line.
The antenna according to claim 2, wherein the first transmission line includes an extension part and a feeding part connected to the extension part, and the feeding point is provided at the feeding part away from the extension part One end of the power feeding part, and one end of the power feeding part away from the extension part is pointed.
The antenna according to claim 2, wherein the first dipole arm and the second dipole arm are symmetrically arranged with respect to the first transmission line.
The antenna according to claim 2, wherein the distance between the first dipole arm and the circuit board is 1/16 to 1 of the resonant wavelength of the antenna, and the second dipole arm is connected to the circuit board. The distance between the circuit boards is 1/16 to 1 of the resonant wavelength of the antenna.
The antenna according to claim 1, wherein the second radiating part comprises a second transmission line, a second connecting arm at an end away from the circuit board in the middle connected to the second transmission line, and connected to the first transmission line. A third vibrator arm extending toward the side away from the circuit board at one end of the second connecting arm, and a fourth vibrator arm extending toward the side away from the circuit board connected to the other end of the second connecting arm, so The ground point is set on the second transmission line.
The antenna according to claim 6, wherein the second radiating portion further comprises an end connected to the third dipole arm away from the second connecting arm and facing the fourth dipole arm An extended fifth vibrator arm, and a sixth vibrator arm connected to an end of the fourth vibrator arm away from the second connecting arm and extending toward the third vibrator arm.
The antenna according to claim 6, wherein the third dipole arm and the fourth dipole arm are symmetrically arranged with respect to a line between the midpoint of the ground point and the midpoint of the second connecting arm. .
The antenna according to any one of claims 1-8, wherein the antenna further comprises a first shield plate arranged on one side of the circuit board and a second shield plate arranged on the other side of the circuit board board.
An aircraft, characterized in that it comprises a fuselage, a landing gear arranged below the fuselage, and the antenna according to any one of claims 1-9, the antenna being arranged in the landing gear .