An external dual-band antenna for a drone and a drone

Abstract

The present invention belongs to the technical field of unmanned aerial vehicles, and specifically discloses an external dual-band antenna for an unmanned aerial vehicle and an unmanned aerial vehicle, including a substrate, a low-frequency oscillator region and a high-frequency oscillator region, a feeding coaxial line, and a grounding end. The two grounding ends are respectively electrically connected to the feeding end of the feeding coaxial line; an avoidance region for arranging the feeding coaxial line is provided in the low-frequency oscillator region or the high-frequency oscillator region; the low-frequency oscillator region includes a first low-frequency oscillator region and a second low-frequency oscillator region; the high-frequency oscillator region includes a first high-frequency oscillator region and a second high-frequency oscillator region which are asymmetrically arranged on the front and back sides of the substrate. With the external dual-band antenna for an unmanned aerial vehicle designed with such a structure, through the first low-frequency oscillator region and the second low-frequency oscillator region, and the asymmetric arrangement of the first high-frequency oscillator region and the second high-frequency oscillator on the front and back sides, the wiring requirements in a relatively small space can be met, making the circuit layout more reasonable, and at the same time, the signal coverage of both the 2.4 GHz and 5.8 GHz dual frequency bands can be satisfied.

Description

Technical Field

[0001] The present invention relates to the technical field of unmanned aerial vehicles, and particularly to an external dual-band antenna for an unmanned aerial vehicle and an unmanned aerial vehicle. Background Art

[0002] With the rapid development of wireless communication and the demand for various data services, antenna design mainly develops towards miniaturization, multi-band and wide-band. Due to its advantages such as compact structure, small size, light weight, low cost, and easy integration with microstrip lines, the microstrip antenna has been widely used. A microstrip antenna is an antenna composed of a conductor patch pasted on a dielectric substrate with a ground plane. It is fed by a coaxial cable to excite an electromagnetic field between the conductor patch and the ground plane, and radiates outward through a slot.

[0003] The existing external dual-band antenna for an unmanned aerial vehicle is generally arranged inside the tripod, and is generally a 2.4 GHz and 5.8 GHz microstrip antenna. Since the size of the microstrip antenna operating in the low frequency band (such as the 900 Hz microstrip antenna) is relatively large, it cannot be arranged inside the tripod due to the size limitation of the tripod. Although the space size of the unmanned aerial vehicle arm is relatively larger than that of the unmanned aerial vehicle tripod, the environment of the unmanned aerial vehicle arm is more complex, which is likely to affect the communication signal of the antenna.

[0004] Therefore, for those skilled in the art, it is urgent to realize an external dual-band antenna for an unmanned aerial vehicle that can solve both the space size problem and the environmental interference problem. Summary of the Invention

[0005] The purpose of the present invention is to provide an external dual-band antenna for an unmanned aerial vehicle, and the circuit layout of the external dual-band antenna for an unmanned aerial vehicle is reasonable, and can meet the signal coverage of the dual-band.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] An external dual-band antenna for an unmanned aerial vehicle includes:

[0008] a substrate, a low-frequency oscillator region and a high-frequency oscillator region arranged on the front and back sides of the substrate, a feeding coaxial cable electrically connected to the low-frequency oscillator region and the high-frequency oscillator region, and grounding ends arranged on the front and back sides of the substrate, and the two grounding ends are respectively electrically connected to the feeding ends of the feeding coaxial cable;

[0009] a avoiding area for arranging the feeding coaxial cable is arranged in the low-frequency oscillator region or the high-frequency oscillator region;

[0010] the low-frequency oscillator region includes a first low-frequency oscillator region and a second low-frequency oscillator region which are asymmetrically arranged on the front and back sides of the substrate;

[0011] The high-frequency oscillator region includes a first high-frequency oscillator region and a second high-frequency oscillator region that are asymmetrically arranged on the front and back sides of the substrate.

[0012] Among them, the first low-frequency oscillator region and the first high-frequency oscillator region are both arranged on the front side of the substrate and are spaced along the length direction of the substrate.

[0013] Among them, the second low-frequency oscillator region and the second high-frequency oscillator region are both arranged on the back side of the substrate and are spaced along the length direction of the substrate.

[0014] Among them, the first low-frequency oscillator region and the first high-frequency oscillator region both include a first microstrip feeder and a second microstrip feeder that are electrically connected to each other, and an air clearance groove is provided between the first microstrip feeder and the second microstrip feeder.

[0015] Among them, the second microstrip feeder is provided in two and is respectively located on both sides of the first microstrip feeder, and the total area of the two second microstrip feeders is smaller than the total area of the first microstrip feeder.

[0016] Among them, the second low-frequency oscillator region and the second high-frequency oscillator region both include a third microstrip feeder and a fourth microstrip feeder that are electrically connected to each other, and the air clearance groove is provided between the third microstrip feeder and the fourth microstrip feeder.

[0017] Among them, the two fourth microstrip feeders are both located on the same side of the two third microstrip feeders.

[0018] Among them, a mapping sheet is further provided on one side of the second low-frequency oscillator region and the second high-frequency oscillator region away from the two third microstrip feeders, and the air clearance groove is provided between the mapping sheet and the third microstrip feeder.

[0019] Among them, the surface area of the third microstrip feeder is larger than the surface area of the fourth microstrip feeder.

[0020] An unmanned aerial vehicle includes the above-mentioned external dual-frequency antenna for unmanned aerial vehicle, a tripod sleeved on the external dual-frequency antenna for unmanned aerial vehicle, and an arm matched with the tripod.

[0021] The beneficial effects of the present invention are as follows: The present invention discloses an external dual-frequency antenna for a drone, which includes a substrate, a low-frequency oscillator region and a high-frequency oscillator region provided on the front and back sides of the substrate, a feeding coaxial line electrically connected to the low-frequency oscillator region and the high-frequency oscillator region, and grounding ends provided on the front and back sides of the substrate. The two grounding ends are respectively electrically connected to the feeding ends of the feeding coaxial line; an avoidance area for arranging the feeding coaxial line is provided in the low-frequency oscillator region or the high-frequency oscillator region; the low-frequency oscillator region includes a first low-frequency oscillator region and a second low-frequency oscillator region which are asymmetrically arranged on the front and back sides of the substrate; the high-frequency oscillator region includes a first high-frequency oscillator region and a second high-frequency oscillator region which are asymmetrically arranged on the front and back sides of the substrate. With the structure design of the external dual-frequency antenna for a drone, through the first low-frequency oscillator region and the second low-frequency oscillator region, and the front and back asymmetry of the first high-frequency oscillator region and the second high-frequency oscillator region, the wiring requirements in a relatively small space can be met, making the circuit layout more reasonable, and at the same time, the signal coverage of the dual frequency bands can also be satisfied. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the front circuit layout diagram of the external dual-frequency antenna for a drone provided in this embodiment;

[0023] Figure 2 is the back circuit layout diagram of the external dual-frequency antenna for a drone provided in this embodiment;

[0024] Figure 3 is the schematic diagram of the scattering parameters of the external dual-frequency antenna for a drone provided in this embodiment;

[0025] Figure 4 is the antenna pattern of the external dual-frequency antenna for a drone at the 2.4 GHz frequency band provided in this embodiment;

[0026] Figure 5 is the antenna pattern of the external dual-frequency antenna for a drone at the 5.8 GHz frequency band provided in this embodiment;

[0027] Figure 6 is the axonometric view of the arm, leg support of the drone and the external dual-frequency antenna for a drone after assembly provided in this embodiment.

[0028] In the figure:

[0029] 1. Substrate;

[0030] 21. First low-frequency oscillator region; 211. First microstrip feeder; 2111. Avoidance area; 212. Second microstrip feeder; 213. Clearance slot; 22. Second low-frequency oscillator region; 221. Third microstrip feeder; 222. Fourth microstrip feeder; 223. Mapping piece;

[0031] 31. First high-frequency oscillator region; 32. Second high-frequency oscillator region;

[0032] 4. Feeding coaxial cable; 5. Grounding terminal; 6. Foam; 7. Tripod; 8. Arm. Detailed implementation manner

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. In addition, it should be noted that for the convenience of description, only parts related to the present invention are shown in the drawings, rather than all structures.

[0034] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but being in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "below", and "under" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0036] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used for distinction in description and do not have special meanings.

[0037] Figure 1 is the front view of an external dual-frequency antenna for a drone provided in this embodiment. Figure 2 is the reverse view of an external dual-frequency antenna for a drone provided in this embodiment; in combination with Figure 1 and Figure 2 As shown, the external dual-frequency antenna for a drone provided in this embodiment includes a substrate 1, a low-frequency oscillator region, a high-frequency oscillator region, a feeding coaxial cable 4, a grounding terminal 5, etc.

[0038] Specifically, as a preference, the substrate 1 in this embodiment is a double-sided board made of FR-4 material. (FR-4 is a code for a flame-resistant material grade, which means a material specification where the resin material must be able to self-extinguish after being in a combustion state. It is not a material name but a material grade. Therefore, there are many types of FR-4 grade materials currently used in general circuit boards, but most are composite materials made of so-called four-functional epoxy resin plus filler and glass fiber.) The low-frequency oscillator area, the high-frequency oscillator area, and the grounding end 5 are respectively arranged on the front and back sides of the substrate 1 through copper plates covered on the substrate 1, so that while meeting the various parameters of the external dual-band antenna of the drone, the circuit layout is more reasonable and more compact, and then the utilization rate of the substrate 1 is effectively improved.

[0039] More specifically, the above-mentioned low-frequency oscillator area in this embodiment includes a first low-frequency oscillator area 21 and a second low-frequency oscillator area 22 that are asymmetrically arranged on the front and back sides of the substrate 1, and the high-frequency oscillator area includes a first high-frequency oscillator area 31 and a second high-frequency oscillator area 32 that are asymmetrically arranged on the front and back sides of the substrate 1; as a preference, the first low-frequency oscillator area 21 and the first high-frequency oscillator area 31 in this embodiment are both arranged on the front side of the substrate 1 and are arranged at intervals along the length direction of the substrate 1; with this layout method, the circuit layout structures of the first low-frequency oscillator area 21 and the first high-frequency oscillator area 31 are basically the same and are both arranged in a "mountain" shape. The first low-frequency oscillator area 21 and the first high-frequency oscillator area 31 both include a first microstrip feeder 211 and a second microstrip feeder 212 that are electrically connected to each other, and an air clearance groove 213 is provided between the first microstrip feeder 211 and the second microstrip feeder 212. Combined Figure 1 As shown, except that the shapes of the two first microstrip feeders 211 in the arranged first low-frequency oscillator area 21 and first high-frequency oscillator area 31 are asymmetric, the remaining parts are symmetrically arranged along the cross-section of the substrate 1.

[0040] Taking the layout of the first low-frequency oscillator area 21 in this embodiment as an example, the above-mentioned circuit layout is further described. The first microstrip feeder 211 is arranged along the length direction in the middle of the substrate 1. The total area of the first microstrip feeder 211 is larger than the sum of the areas of the two second microstrip feeders 212 arranged on both sides of the first microstrip feeder 211. And the above-mentioned air clearance groove 213 is provided between the two second microstrip feeders 212 and the first microstrip feeder. And the total length of the first microstrip feeder 211 is 2.2 to 2.5 times the length of the second microstrip feeder 212, so as to further improve the signal coverage rate by improving the capacitance characteristics formed by the first microstrip feeder 211 and the second microstrip feeder 212.

[0041] Further, in order to facilitate the erection of the feeding coaxial line 4 and reduce the influence of the feeding coaxial line 4 on the above-mentioned low-frequency oscillator region and high-frequency oscillator region, as a preference, in this embodiment, an avoidance region 2111 is provided along the length direction of the substrate 1 in the first low-frequency oscillator region 21, and the feeding coaxial line 4 is erected along the avoidance region 2111. In order to increase the gap between the feeding coaxial line 4 and the lower substrate 1, effectively reduce the influence of signal transmission on the resonant wave, and facilitate the fixation of the feeding coaxial line 4, a foam 6 is also provided between the feeding coaxial line 4 and the substrate 1. In this way, the feeding end of the feeding coaxial line 4, that is, the tail of the feeding coaxial line 4, is electrically connected to the two grounding ends 5 provided on the front and back sides of the substrate 1; as a preference, the inner conductor in the head of the feeding coaxial line 4 is electrically connected to the above-mentioned low-frequency oscillator region, and the outer conductor is electrically connected to the above-mentioned high-frequency oscillator region.

[0042] Further, in this embodiment, the above-mentioned second low-frequency oscillator region 22 and the second high-frequency oscillator region 32 are both provided on the back side of the substrate 1, and are also arranged at intervals along the length direction of the substrate 1. Moreover, the layout structures of the second low-frequency oscillator region 22 and the second high-frequency oscillator region 32 are basically the same, and both the second low-frequency oscillator region 22 and the second high-frequency oscillator region 32 include a third microstrip feeder 221 and a fourth microstrip feeder 222 that are electrically connected to each other, and an avoidance slot 213 is provided between the third microstrip feeder 221 and the fourth microstrip feeder 222, and both the two fourth microstrip feeders 222 are located on the same side of the two third microstrip feeders 221.

[0043] Taking the second low-frequency oscillator region 22 in this embodiment as an example, as a preference, the fourth microstrip feeder 222 is arranged on one side of the third microstrip feeder 221, and the above-mentioned avoidance slot 213 is shared between the third microstrip feeder 221 and the fourth microstrip feeder 222. In addition, a mapping sheet 223 is also provided on the side of the third microstrip feeder 221 away from the fourth microstrip feeder 222, and an avoidance slot 213 is provided between the mapping sheet 223 and the third microstrip feeder 221. In this way, the surface area of the third microstrip feeder 221 after being arranged is larger than that of the fourth microstrip feeder 222. Figure 2 As shown, after the second low-frequency oscillator region 22 and the second high-frequency oscillator region 32 are arranged in the above manner, except that the shapes of the two third microstrip feeders 221 are asymmetrical, the remaining parts are symmetrically arranged along the cross-section of the substrate 1.

[0044] In addition, as a preference, the above-mentioned second low-frequency oscillator region 22 is formed by mirroring the first low-frequency oscillator region 21. Compared with the circuit layout of the first low-frequency oscillator region 21, one second microstrip feeder 212 is missing; similarly, the second high-frequency oscillator region 32 is formed by mirroring the first high-frequency oscillator region 31, and compared with the circuit layout of the first high-frequency oscillator region 31, one second microstrip feeder 212 is also missing.

[0045] The external dual-frequency antenna of the drone with the above structure can solve the problem of wiring difficulties caused by the size limitation of the tripod 7 in the prior art, and the wires after laying can meet the signal coverage of the 2.4GHz and 5.8GHz dual-frequency bands to the greatest extent. Figure 3 , Figure 4 and Figure 5 It is a schematic diagram of the scattering parameters and antenna radiation pattern of the antenna when it works in the two frequency bands of 2.39GHz~2.65GHz and 5.53GHz~6GHz.

[0046] In addition, combined Figure 6 As shown, this embodiment further provides a drone, which includes the above-mentioned drone external dual-frequency antenna, a tripod 7 mounted with the drone external dual-frequency antenna, and an arm 8 matched with the tripod 7. The drone using the above-mentioned drone external dual-frequency antenna can effectively meet the signal coverage of the drone's dual-bands when the tripod 7 has limited space.

[0047] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An external dual-band antenna for a drone, characterized in that It includes a substrate (1), a low-frequency oscillator region and a high-frequency oscillator region disposed on the front and back sides of the substrate (1), a feeding coaxial line (4) electrically connected to the low-frequency oscillator region and the high-frequency oscillator region, and grounding terminals (5) disposed on the front and back sides of the substrate (1), and the two grounding terminals (5) are respectively electrically connected to the feeding ends of the feeding coaxial line (4); an avoidance region (2111) for disposing the feeding coaxial line (4) is provided in the low-frequency oscillator region or the high-frequency oscillator region; the low-frequency oscillator region includes a first low-frequency oscillator region (21) and a second low-frequency oscillator region (22) which are asymmetrically arranged up and down on the front and back sides of the substrate (1); the high-frequency oscillator region includes a first high-frequency oscillator region (31) and a second high-frequency oscillator region (32) which are asymmetrically arranged up and down on the front and back sides of the substrate (1). The first low-frequency oscillator region (21) and the first high-frequency oscillator region (31) are both disposed on the front side of the substrate (1) and are spaced apart along the length direction of the substrate (1); the first low-frequency oscillator region (21) and the first high-frequency oscillator region (31) both include a first microstrip feeder (211) and a second microstrip feeder (212) which are electrically connected to each other.

2. The external dual-band antenna for a drone according to claim 1, wherein The second low-frequency oscillator region (22) and the second high-frequency oscillator region (32) are both disposed on the back side of the substrate (1) and are spaced apart along the length direction of the substrate (1).

3. The external dual-band antenna for an unmanned aerial vehicle according to claim 1, wherein An avoidance slot (213) is formed between the first microstrip feeder (211) and the second microstrip feeder (212).

4. The external dual-band antenna for a drone according to claim 3, wherein The second microstrip feeder (212) is provided in two and is respectively located on both sides of the first microstrip feeder (211), and the total area of the two second microstrip feeders (212) is smaller than the total area of the first microstrip feeder (211).

5. The external dual-band antenna for a drone according to claim 3, characterized in that, The second low-frequency oscillator region (22) and the second high-frequency oscillator region (32) both include a third microstrip feeder (221) and a fourth microstrip feeder (222) which are electrically connected to each other, and the avoidance slot (213) is formed between the third microstrip feeder (221) and the fourth microstrip feeder (222).

6. The external dual-band antenna for an unmanned aerial vehicle according to claim 5, characterized in that, Both of the two fourth microstrip feeders (222) are located on the same side of the two third microstrip feeders (221).

7. The external dual-band antenna for a drone according to claim 5, characterized in that, A mapping sheet (223) is further provided on the side of the second low-frequency oscillator region (22) and the second high-frequency oscillator region (32) away from the two third microstrip feeders (221), and the avoidance slot (213) is formed between the mapping sheet (223) and the third microstrip feeder (221).

8. The external dual-band antenna for a drone according to claim 7, characterized in that The surface area of the third microstrip feeder (221) is larger than the surface area of the fourth microstrip feeder (222).

9. A drone, characterized in that, It includes the external dual-band antenna for unmanned aerial vehicle according to any one of claims 1 to 8, a tripod (7) sleeved on the external dual-band antenna for unmanned aerial vehicle, and an arm (8) matched with the tripod (7).

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