Antenna and aircraft

Abstract

The present invention discloses an antenna and an aircraft, wherein the antenna comprises a substrate, a circuit board arranged on the substrate, a first radiating part arranged on one side of the substrate, and a second radiating part arranged on the other side of the substrate; a feeding point is arranged 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 arranged on the second radiating part, and the second radiating part is electrically connected to the circuit board through the grounding point. The present invention integrates the circuit board and the antenna into an integrated design, simplifies the antenna structure, reduces the antenna volume, and can realize omnidirectional uniform radiation of the antenna.

Description

Technical Field

[0001] The present invention relates to the field of communications, and in particular to an antenna and an aircraft. Background Art

[0002] At present, antennas are important components in the field of wireless communications. With the development of drones, large-size antennas take up a lot of space and are inconvenient to install. The antennas used in drones need to meet the characteristics of small size and omnidirectional and uniform radiation. Summary of the invention

[0003] In order to overcome the problem of large antenna size in the prior art, an object of the present invention is to provide an antenna and an aircraft to reduce the size of the antenna and achieve omnidirectional uniform radiation.

[0004] In order to achieve the above-mentioned purpose, the present invention provides an antenna, including a substrate, a circuit board arranged on the substrate, a first radiating portion arranged on one side of the substrate and a second radiating portion arranged on the other side of the substrate; a feeding point is provided on the first radiating portion, and the first radiating portion is electrically connected to the circuit board through the feeding point; a grounding point is provided on the second radiating portion, and the second radiating portion is electrically connected to the circuit board through the grounding point.

[0005] Furthermore, the first radiating portion includes a first transmission line, a first connecting arm connected in the middle to an end of the first transmission line away from the circuit board, a first dipole arm connected to one end of the first connecting arm and extending toward one side of the circuit board, and a second dipole arm connected to the other end of the first connecting arm and extending toward one side of the circuit board, and the feeding point is arranged on the first transmission line.

[0006] Furthermore, the first transmission line includes an extension portion and a feeding portion connected to the extension portion, the feeding point is provided at one end of the feeding portion away from the extension portion, and the end of the feeding portion away from the extension portion is pointed.

[0007] Furthermore, the first dipole arm and the second dipole arm are symmetrically arranged with respect to the first transmission line.

[0008] Furthermore, 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 1 / 16 to 1 of the resonant wavelength of the antenna.

[0009] Furthermore, the second radiating portion includes a second transmission line, a second connecting arm whose middle portion is connected to an end of the second transmission line away from the circuit board, a third dipole arm connected to one end of the second connecting arm and extending toward a side away from the circuit board, and a fourth dipole arm connected to the other end of the second connecting arm and extending toward a side away from the circuit board, and the grounding point is arranged on the second transmission line.

[0010] Furthermore, the second radiating portion also includes a fifth dipole arm connected to an end of the third dipole arm away from the second connecting arm and extending toward a side of the fourth dipole arm, and a sixth dipole arm connected to an end of the fourth dipole arm away from the second connecting arm and extending toward a side of the third dipole arm.

[0011] Furthermore, the third dipole arm and the fourth dipole arm are symmetrically arranged with respect to a straight line where a midpoint of the grounding point and a midpoint of the second connecting arm are located.

[0012] Furthermore, the antenna also 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.

[0013] The present invention further provides an aircraft, comprising a fuselage, a landing gear disposed below the fuselage, and the above-mentioned antenna, wherein the antenna is disposed in the landing gear.

[0014] Compared with the prior art, the beneficial effect of the present invention lies in: by arranging a circuit board on a substrate, a first radiating part and a second radiating part are respectively arranged on both sides of the substrate, the first radiating part is electrically connected to the circuit board through a feeding point, and the second radiating part is electrically connected to the circuit board through a grounding point, the circuit board and the antenna are designed as an integrated whole, the antenna structure is simplified, the antenna volume is reduced, and omnidirectional and uniform radiation of the antenna can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the front structure of an antenna provided in an embodiment of the present invention;

[0016] Figure 2 A schematic diagram of the back structure of the antenna provided by the first embodiment of the present invention;

[0017] Figure 3 It is a schematic diagram of the back structure of the antenna according to the first implementation mode of the second embodiment of the present invention;

[0018] Figure 4 It is a schematic diagram of the back structure of the antenna according to the second implementation mode of the second embodiment of the present invention;

[0019] Figure 5 It is a schematic diagram of the back structure of the antenna according to the third implementation mode of the second embodiment of the present invention;

[0020] Figure 6 An S-parameter diagram of an antenna provided in an embodiment of the present invention;

[0021] Figure 7 The directional diagram of the antenna provided by the embodiment of the present invention;

[0022] Figure 8 A schematic diagram of an aircraft provided in an embodiment of the present invention.

[0023] In the figure: 10, antenna; 1, substrate; 2, circuit board; 3, first radiating part; 31, feeding point; 32, first transmission line; 321, extension part; 322, feeding part; 33, first connecting arm; 34, first dipole arm; 35, second dipole arm; 4, second radiating part; 41, grounding point; 42, second transmission line; 43, second connecting arm; 44, third dipole arm; 45, fourth dipole arm; 46, fifth dipole arm; 47, sixth dipole arm; 48, radiating plate; 5, first shielding plate; 6, second shielding plate; 20, fuselage; 30, landing gear. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this specification are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification and in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0026] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0027] like Figure 1-2As shown, the antenna 10 provided by the embodiment of the present invention comprises a substrate 1, a circuit board 2 arranged on the substrate 1, a first radiating portion 3 arranged on one side of the substrate 1, and a second radiating portion 4 arranged on the other side of the substrate 1; a feeding point 31 is arranged on the first radiating portion 3, and the first radiating portion 3 is electrically connected to the circuit board 2 through the feeding point 31; a grounding point 41 is arranged on the second radiating portion 4, and the second radiating portion 4 is electrically connected to the circuit board 2 through the grounding point 41. The circuit board 2, the first radiating portion 3, and the second radiating portion 4 are designed as one body, which simplifies the structure of the antenna 10, reduces the size of the antenna 10, and can realize omnidirectional uniform radiation of the antenna.

[0028] like Figure 1 As shown, the first radiating portion 3 includes a first transmission line 32, a first connecting arm 33 connected in the middle to an end of the first transmission line 32 away from the circuit board 2, a first dipole arm 34 connected to one end of the first connecting arm 33 and extending toward one side of the circuit board 2, and a second dipole arm 35 connected to the other end of the first connecting arm 33 and extending toward one side of the circuit board 2, and a 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, and the feeding point 31 is provided at one end of the feeding portion 322 away from the extension portion 321, and the end of the feeding portion 322 away from the extension portion 321 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 achieve feeding.

[0029] In one embodiment, the first transmission line 32 is arranged at the midline position of the substrate 1, and the first dipole arm 34 and the second dipole arm 35 are symmetrically arranged about 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 resonant wavelength of the antenna. 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.

[0030] like Figure 2 As shown, in the first embodiment, the second radiating portion 4 includes a second transmission line 42, a second connecting arm 43 connected to the end of the second transmission line 42 away from the circuit board 2, a third dipole arm 44 connected to one end of the second connecting arm 43 and extending toward the side away from the circuit board 2, and a fourth dipole arm 45 connected to the other end of the second connecting arm 43 and extending toward the side away from the circuit board 2, and the grounding point 41 is provided on the second transmission line 42. Specifically, the grounding point 41 is provided at the end of the second transmission line 42 away from the second connecting arm 43, and the end of the second transmission line 42 is welded to the circuit board 2. In one embodiment, the second connecting arm 43 and the first connecting arm 33 are respectively provided on both sides of the substrate 1 and are symmetrically arranged about the substrate 1. In another embodiment, the widths of the second connecting arm 43 and the first connecting arm 33 may also be different.

[0031] In one embodiment, the second radiating portion 4 also includes a fifth dipole arm 46 connected to an end of the third dipole arm 44 away from the second connecting arm 43 and extending toward the fourth dipole arm 45, and a sixth dipole arm 47 connected to an end of the fourth dipole arm 45 away from the second connecting arm 43 and extending toward the third dipole arm 44. The fifth dipole arm 46 and the sixth dipole arm 47 are symmetrically arranged about a straight line where the midpoint of the grounding point 41 and the midpoint of the second connecting arm 43 are located.

[0032] In one embodiment, the third dipole arm 44 and the fourth dipole arm 45 are symmetrically arranged about the 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 resonance wavelength of the antenna.

[0033] like Figure 3 As shown, in the second embodiment, the second radiating portion 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. Figure 3 As shown in FIG. 1 , in the first embodiment, the radiation sheet 48 is in a rectangular shape. Figure 4 As shown in FIG. 1 , in the second embodiment, the shape of the radiation piece 48 is a trapezoid. Figure 5 As shown, in the third embodiment, the radiation piece 48 is elliptical in shape.

[0034] Preferably, the antenna 10 further includes a first shielding plate 5 disposed on one side of the circuit board 2 and a second shielding plate 6 disposed on the other side of the circuit board 2, so as to effectively reduce signal interference between the antenna 10 and other circuit modules.

[0035] like Figure 6 As shown, it is an S parameter diagram of antenna 10. It can be seen that the antenna can achieve omnidirectional coverage at 5.5 GHz, and the maximum value of the antenna radiation direction is in the horizontal direction.

[0036] like Figure 7 As shown, this is the radiation pattern of the antenna at 5.5 GHz. It can be seen that the antenna achieves omnidirectional coverage at 5.5 GHz.

[0037] like Figure 8 As shown, the aircraft provided by the embodiment of the present invention includes a fuselage 20, a landing gear 30 disposed below the fuselage 20, and the above-mentioned antenna 10, wherein the antenna 10 is disposed in the landing gear 30. The antenna 10 is placed perpendicular to the fuselage 20.

[0038] In this embodiment, the bottom view of the aircraft is used as an example to schematically illustrate the installation position of the antenna 10. The installation position of the antenna 10 in this embodiment is not limited to Figure 8The installation position shown is not limited to the installation position shown, and other installation positions of the antenna 10 that can better meet the signal reception and transmission requirements are also acceptable.

[0039] The antenna 10 disposed in the landing gear 30 of the aircraft widens the beam width of the antenna 10 in the pitch plane, and the signal remains stable when the antenna is tilted, thereby reducing the impact of the aircraft's flight posture on communication during the flight of the aircraft, and ensuring the communication of the aircraft during the flight.

[0040] The antenna 10 and the aircraft provided in the embodiment of the present invention are configured by arranging a circuit board 2 on a substrate 1, and arranging a first radiating portion 3 and a second radiating portion 4 on both sides of the substrate 1, respectively. The first radiating portion 3 is electrically connected to the circuit board 2 via a feeding point 31, and the second radiating portion 4 is electrically connected to the circuit board 2 via a grounding point 41. The circuit board 2 and the antenna 10 are designed as an integrated whole, which simplifies the antenna structure, reduces the antenna volume, and can realize omnidirectional and uniform radiation of the antenna.

[0041] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An omnidirectional antenna, characterized in that: The invention comprises a substrate, a circuit board arranged on the substrate, a first radiating part arranged on one side of the substrate and a second radiating part arranged on the other side of the substrate; a feeding point is arranged on the first radiating part, and the first radiating part is electrically connected to the circuit board through the feeding point, and the first radiating part comprises 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, a first dipole arm connected to an end of the first connecting arm and extending toward one side of the circuit board, and a second dipole arm connected to the other end of the first connecting arm and extending toward one side of the circuit board; a grounding point is arranged on the second radiating part, and the second radiating part is electrically connected to the circuit board through the grounding point, and the second radiating part comprises a second transmission line, a second connecting arm connected to an end of the second transmission line away from the circuit board in the middle, a third dipole arm connected to an end of the second connecting arm and extending toward a side away from the circuit board, and a second dipole arm connected to the other end of the second connecting arm and extending toward A fourth dipole arm extending away from one side of the circuit board, the grounding point is set on the second transmission line, the first dipole arm and the second dipole arm are symmetrically arranged with respect to the first transmission line, the second radiating portion also includes a fifth dipole arm connected to an end of the third dipole arm away from the second connecting arm and extending toward one side of the fourth dipole arm, and a sixth dipole arm connected to an end of the fourth dipole arm away from the second connecting arm and extending toward one side of the third dipole arm, the third dipole arm and the fourth dipole arm are symmetrically arranged with respect to a straight line where the midpoint of the grounding point and the midpoint of the second connecting arm are located; the size of the first dipole arm and the second dipole arm is 1 / 8 to 3 / 4 of the resonant wavelength of the antenna, the size of the third dipole arm and the fourth dipole arm is 1 / 8 to 3 / 4 of the resonant wavelength of the antenna, the second radiating portion includes a second transmission line and a radiating sheet connected to an end of the second transmission line away from the circuit board, and the radiating portion is trapezoidal or elliptical.

2. The antenna according to claim 1, characterized in that The feeding point is arranged on the first transmission line.

3. The antenna according to claim 2, characterized in that: The first transmission line includes an extension portion and a feeding portion connected to the extension portion, the feeding point is arranged at one end of the feeding portion away from the extension portion, and the end of the feeding portion away from the extension portion is pointed.

4. The antenna according to claim 2, characterized in that: 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 1 / 16 to 1 of the resonant wavelength of the antenna.

5. The antenna according to any one of claims 1 to 4, characterized in that: 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.

6. An aircraft, characterized in that: The aircraft comprises a fuselage, a landing gear arranged below the fuselage, and the antenna according to any one of claims 1 to 5, wherein the antenna is arranged in the landing gear.

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