CN217656069U - Dual-frequency antenna, remote controller and unmanned aerial vehicle system - Google Patents

Abstract

The utility model provides a dual-frenquency antenna (100), remote controller (200) and unmanned aerial vehicle system (300), dual-frenquency antenna (100) includes base plate (10), first radiation minor matters (20), second radiation minor matters (30) and third radiation minor matters (40), base plate (10) are equipped with feed point (11) and ground point (12), first radiation minor matters (20) include feed end (21) and coupling end (22), feed end (21) are connected with feed point (11) electricity. The second radiation branch (30) comprises a grounding end (31) and a connecting end (32), and the grounding end (31) is electrically connected with the grounding point (12). The third radiation branch (30) is electrically connected with the connecting end (32) and is electromagnetically coupled with the coupling end (22), the first radiation branch (20) is used for radiating high-frequency electromagnetic waves, and the first radiation branch, the second radiation branch and the third radiation branch are used for radiating low-frequency electromagnetic waves.

Description

Dual-frequency antenna, remote controller and unmanned aerial vehicle system

Technical Field

The utility model relates to an antenna technology field especially relates to dual-frenquency antenna, remote controller and unmanned aerial vehicle system.

Background

The antenna of unmanned aerial vehicle remote controller is dual-frenquency antenna usually, support the communication of two frequency channels of 2.4GHz and 5.8GHz, because the lower antenna size of frequency is big more, in order to guarantee 2.4 GHz's low frequency radiation, the overall dimension of antenna is great relatively, because space restriction, this antenna is collapsible the outside that sets up in the remote controller main part usually, expand the antenna for the remote controller main part when needs use the remote controller, after having used up the remote controller again with the antenna folding lateral part to the remote controller main part. The remote controller with the setting mode has two problems, one is that the antenna is arranged outside the remote controller, the antenna is easy to damage, the size of the remote controller is increased, the user needs to perform unfolding action of the antenna when using the remote controller every time, folding action of the remote controller is needed when using the remote controller, and the remote controller is inconvenient to use.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a dual-frenquency antenna, remote controller and unmanned aerial vehicle system.

The utility model discloses dual-frenquency antenna that the first aspect provided for the remote controller, the remote controller can establish communication connection with unmanned aerial vehicle, the dual-frenquency antenna includes:

the substrate is provided with a feeding point and a grounding point;

the first radiation branch section comprises a feed end and a coupling end opposite to the feed end, and the feed end is electrically connected with the feed point;

the second radiation branch node comprises a grounding end and a connecting end opposite to the grounding end, the grounding end is electrically connected with the grounding point, and the second radiation branch node and the first radiation branch node are arranged at intervals;

the third radiation branch knot is electrically connected with the connecting end and is electromagnetically coupled with the coupling end;

the first radiation branch is used for radiating high-frequency electromagnetic waves, and the first radiation branch, the second radiation branch and the third radiation branch are used for radiating low-frequency electromagnetic waves.

The utility model discloses the remote controller that the second aspect provided, including remote controller main part and foretell dual-frenquency antenna, the dual-frenquency antenna install in inside the remote controller main part.

The utility model discloses unmanned aerial vehicle system that third aspect provided, including unmanned aerial vehicle and foretell remote controller, the remote controller is used for the remote control unmanned aerial vehicle.

According to the above technical scheme, the utility model discloses the dual-band antenna that the first aspect provided is used for radiating the high frequency electromagnetic wave through setting up first radiation minor matters, second radiation minor matters and third radiation minor matters are used for radiating the low frequency electromagnetic wave jointly, thus, shared the first radiation minor matters that are used for realizing the high frequency radiation when realizing the low frequency radiation, be favorable to the miniaturization of antenna, thereby can provide support for the miniaturization of the remote controller that is provided with this antenna, electromagnetic coupling between third radiation minor matters and the first radiation minor matters coupling end can effectively widen the antenna bandwidth in addition.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is a schematic structural diagram of a first view angle of a dual-band antenna according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a second view angle of the dual-band antenna according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a third view angle of the dual-band antenna according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a fourth view angle of the dual-band antenna according to an embodiment of the present invention;

fig. 5 is a 2D directional radiation diagram of a dual-band antenna according to an embodiment of the present invention;

fig. 6 is a 2D directional radiation diagram of a 2.4GHz frequency of the dual-band antenna according to an embodiment of the invention when the second radiation branch is located right behind, on the left of, and on the right of the first radiation branch;

fig. 7 is a 2D directional radiation diagram of a dual-band antenna according to an embodiment of the present invention, when the second radiation branch is located right behind, on the left of, and on the right of the first radiation branch, at a frequency of 5.8 GHz;

fig. 8 is a current distribution diagram of the antenna surface when the low frequency antenna of the dual-band antenna resonates according to an embodiment of the present invention;

fig. 9 is a current distribution diagram of the antenna surface when the high-frequency antenna of the dual-band antenna according to an embodiment of the present invention resonates;

fig. 10 is an equivalent circuit diagram of a dual-band antenna according to an embodiment of the present invention;

fig. 11 is an S parameter simulation diagram of a dual-band antenna according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a dual-band antenna according to another embodiment of the present invention;

fig. 13 is a simulation diagram of the S parameter of a dual-band antenna according to another embodiment of the present invention;

fig. 14 is a schematic structural diagram of a dual-band antenna according to another embodiment of the present invention;

fig. 15 is a 2D directional radiation diagram of a dual-band antenna according to another embodiment of the present invention at a frequency of 5.8 GHz;

fig. 16 is a schematic structural diagram of a dual-band antenna according to another embodiment of the present invention;

fig. 17 is a schematic partial structure diagram of a remote controller according to an embodiment of the present invention;

fig. 18 is an S parameter simulation diagram of a remote controller according to an embodiment of the present invention;

fig. 19 is a schematic structural diagram of an unmanned aerial vehicle system according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1 to 4, an embodiment of the present invention provides a dual-band antenna 100, where the dual-band antenna 100 includes a substrate 10, a first radiation branch 20, a second radiation branch 30, and a third radiation branch 40, the substrate 10 is provided with a feeding point 11 and a grounding point 12, the first radiation branch 20 includes a feeding end 21 and a coupling end 22 opposite to the feeding end 21, and the feeding end 21 is electrically connected to the feeding point 11. The second radiation branch 30 includes a ground terminal 31 and a connection terminal 32 opposite to the ground terminal 31, the ground terminal 31 is electrically connected to the ground point 12, and the second radiation branch 30 is spaced apart from the first radiation branch 20. The third radiation branch 40 is electrically connected to the connection end 32 and electromagnetically coupled to the coupling end 22, wherein the first radiation branch 20 is used for radiating high-frequency electromagnetic waves, and the first radiation branch 20, the second radiation branch 30 and the third radiation branch 40 are used for radiating low-frequency electromagnetic waves. Illustratively, the first radiation branch 20 is configured to radiate electromagnetic waves with a frequency of 5.8GHz, and the first radiation branch 20, the second radiation branch 30, and the third radiation branch 40 are collectively configured to radiate electromagnetic waves with a frequency of 2.4 GHz.

The embodiment of the utility model provides a dual-band antenna 100 is used for radiating the high frequency electromagnetic wave through setting up first radiation minor matters 20, second radiation minor matters 30 and third radiation minor matters 40 are used for radiating the low frequency electromagnetic wave jointly, so, shared the first radiation minor matters 20 that is used for realizing the high frequency radiation when realizing the low frequency radiation, be favorable to the miniaturization of antenna, thereby can provide support for the miniaturization of the remote controller that is provided with this antenna, electromagnetic coupling between third radiation minor matters and the first radiation minor matters coupling end can effectively widen the antenna bandwidth in addition.

As shown in fig. 1 and 4, in some embodiments, the substrate 10 includes a first surface 10a and a second surface 10b opposite to the first surface 10a, the first radiating branch 20, the second radiating branch 30, and the third radiating branch 40 are disposed on the first surface 10a of the substrate 10, the feeding point 11 and the grounding point 12 are disposed on the second surface 10b of the substrate 10, and the grounding point 12 surrounds the feeding point 11 and is disposed electrically isolated from the feeding point 11. The first radiating branch 20 is electrically connected to the feeding point 11 through the substrate 10, and the second radiating branch 30 is electrically connected to the ground point 12 extending from the edge of the substrate 10 to the second surface 10b of the substrate 10.

Of course, the feeding point 11 and the grounding point 12 are not limited to be disposed on the second surface 10b of the substrate 10, but may be disposed on the first surface 10a of the substrate 10. The relation between the grounding point 12 and the feeding point 11 is not limited to the grounding point 12 surrounding the feeding point 11, but the feeding point 11 may surround the grounding point 12. The second radiating branch 30 is not limited to extend from the edge of the substrate 10 to the second surface 10b of the substrate 10 to be electrically connected to the grounding point 12, and may also pass through the substrate 10 to be electrically connected to the grounding point 12, which may be determined according to the actual design requirement.

Alternatively, the grounding point 12 and the feeding point 11 are formed on the second surface 10b of the substrate 10 by using a LAP (Laser active Plating) process, a LSD (Laser-Direct-structuring) process, or an adhesive process.

As shown in fig. 4, in some embodiments, the dual-band antenna 100 further includes a coaxial line 50, one end of the coaxial line 50 is disposed on the second surface 10b of the substrate 10, a core line 51 of the coaxial line 50 is electrically connected to the feeding point 11, and a shielding layer 52 of the coaxial line 50 is electrically connected to the grounding point 12.

As shown in fig. 3, in some embodiments, the edge of the substrate 10 is convexly provided with a mounting portion 13, the mounting portion 13 is provided with a mounting hole 131, and the dual-band antenna 100 may be fastened to another device body, for example, a remote controller body, by means of screws fitting the mounting hole 131. Of course, the dual-band antenna 100 is not limited to the above-described mounting method, and the substrate 10 may be mounted on another device body by bonding, clipping, or fusing, for example.

In some embodiments, the third radiation branch 40 is spaced apart from the substrate 10, and the first radiation branch 20 and the second radiation branch 30 are both located between the third radiation branch 40 and the substrate 10. In this embodiment, a spatial three-dimensional structure is formed, which is advantageous for miniaturization of the dual band antenna 100. Optionally, the first radiating branch 20 and the second radiating branch 30 are both linear. Optionally, the first radiating branch 20 and the second radiating branch 30 are parallel. Optionally, the length of the first radiating branch 20 is the same as the length of the second radiating branch 30.

When feeding the dual-band antenna 100, the maximum radiation direction of the dual-band antenna 100 is biased toward the direction of the second radiation branch 30 toward the first radiation branch 20, i.e., the connection direction of the first radiation branch 20 and the second radiation branch 30. The connection line between the first radiation branch 20 and the second radiation branch 30 refers to a connection line between the midpoint of the cross-sectional profile of the first radiation branch 20 and the midpoint of the cross-sectional profile of the second radiation branch 30 on the same cross section. When the cross-sectional profile of the first radiating branch 20 and the cross-sectional profile of the second radiating branch 30 are irregular, the connection line between the first radiating branch 20 and the second radiating branch 30 refers to the connection line between any point in the middle area of the cross-sectional profile of the first radiating branch 20 and any point in the middle area of the cross-sectional profile of the second radiating branch 30, and this definition is used below.

Specifically, as shown in fig. 5, the horizontal directional diagram of the dual-band antenna 100 according to the embodiment of the present invention shown in fig. 5 shows that the maximum radiation direction of the dual-band antenna 100 is deviated to the direction of the connection line between the second radiation branch 30 and the first radiation branch 20, as can be seen from fig. 5.

As shown in fig. 1, in some embodiments, the first radiation branch 20 and the second radiation branch 30 are parallel, the first radiation branch 20 is perpendicular to the substrate 10, and the plane of the third radiation branch 40 and the plane of the second radiation branch 30 are inclined or perpendicular to each other. In the first embodiment, the dual-band antenna 100 can be made compact, which is beneficial to miniaturizing the dual-band antenna 100, and the third radiation branch 40 can increase the radiation intensity of the dual-band antenna 100 in the first direction. Wherein the first direction is a direction perpendicular to the substrate 10. Use foretell dual-band antenna 100 to use at the remote controller as an example, install in the remote controller body when above-mentioned dual-band antenna 100, first direction is the top direction of remote controller, and this embodiment can increase the radiant intensity at remote controller top, avoids the top of remote controller to have the condition of signal blind spot, and there is the condition that the signal blind spot appears losing the antithetical couplet with the remote controller when the top of remote controller can lead to unmanned aerial vehicle to fly through the remote controller top.

As shown in fig. 2, in some embodiments, the third radiating branch 40 is bent toward the coupling end 22 relative to the second radiating branch 30. In this embodiment, the electromagnetic coupling of the third radiation branch 40 and the coupling end 22 of the first radiation branch 20 can be enhanced. Of course, it is also possible that the third radiation branch 40 is not arranged to bend towards the direction close to the coupling end 22, as long as the third radiation branch 40 can play a role in increasing the radiation intensity at the top of the remote controller.

As shown in fig. 2 and 3, in some embodiments, the third radiating branch 40 is a semi-closed structure and is disposed around the coupling end 22, and the second radiating branch 30 and the notch 40a of the semi-closed structure are respectively located at two opposite sides of the first radiating branch 20. In this embodiment, the third radiation branch 40 is disposed around the coupling end 22, so that the electromagnetic coupling can be enhanced. Second, the notch 40a may be oriented to deflect the maximum radiation direction of the dual-band antenna 100 to the side of the notch 40a.

As shown in fig. 3, in some embodiments, the third radiation branch 40 includes a first extending portion 41, a second extending portion 42 and a third extending portion 43, the first extending portion 41 is electrically connected to the connection end 32, one end of the second extending portion 42 is electrically connected to one end of the first extending portion 41, one end of the third extending portion 43 is electrically connected to the other end of the first extending portion 41, wherein the second extending portion 42 is parallel to the third extending portion 43, the second extending portion 42 is perpendicular to the first extending portion 41, and a gap 40a is formed between one end of the second extending portion 42 away from the first extending portion 41 and one end of the third extending portion 43 away from the first extending portion 41. Alternatively, the length of the second extension portion 42 is the same as that of the third extension portion 43, and the first extension portion 41, the second extension portion 42, and the third extension portion 43 form a rectangular structure with one side opened. Of course, the third radiating branch 40 is not limited to be configured as the above-mentioned rectangular structure with one open side, for example, in some other embodiments, the third radiating branch 40 may be configured as an arc structure with one open side, or a triangular structure with one open side, or a trapezoid structure with one open side, or any other structure with one open side, as long as the notches 40a of the second radiating branch 30 and the semi-closed structure are respectively located at two opposite sides of the first radiating branch 20, so that the notch 40a can bias the maximum radiation direction of the dual-band antenna 100 to the side where the notch 40a is located.

As shown in fig. 3, in some embodiments, the third radiating branch 40 is divided into two symmetrical portions by a dividing line S, and the first radiating branch 20 is located on the dividing line S. In this embodiment, the symmetrical arrangement facilitates equalization of current flow during electromagnetic coupling between the third radiation branch 40 and the first radiation branch 20, so that radiation is stabilized.

As shown in fig. 3, in some embodiments, the line L connecting the first radiating branch 20 and the second radiating branch 30 forms an angle with the separation line S. That is, the first radiation branch 20 is located on the dividing line S, and the second radiation branch 30 is disposed at one side of the dividing line S. As can be seen from the above, the maximum radiation direction of the dual-band antenna 100 is biased to the direction of the second radiation branch 30 toward the first radiation branch 20, that is, the connection line direction of the first radiation branch 20 and the second radiation branch 30, and the direction of the maximum radiation direction of the dual-band antenna 100 can be adjusted by adjusting the relative position of the second radiation branch 30 and the first radiation branch 20.

As shown in fig. 6, when the second radiation branch 30 of the dual-band antenna 100 shown in fig. 6 is located right behind, on the left side, and on the right side of the first radiation branch 20, the horizontal directional diagram of the 2.4GHz frequency antenna is provided. As can be seen from fig. 6, when the position of the second radiation branch 30 changes relative to the position of the first radiation branch 20, the maximum radiation direction of the 2.4GHz frequency antenna also changes, specifically, the maximum radiation direction is biased toward the direction of the line L connecting the second radiation branch 30 and the first radiation branch 20.

As shown in fig. 7, fig. 7 shows a horizontal directional diagram of a 5.8GHz frequency antenna when the second radiation branch 30 of the dual-band antenna 100 is located right behind, on the left side, and on the right side of the first radiation branch 20. As can be seen from fig. 7, when the position of the second radiation branch 30 changes relative to the position of the first radiation branch 20, the maximum radiation direction of the 5.8GHz frequency antenna also changes, specifically, the maximum radiation direction is biased toward the direction of the line L connecting the second radiation branch 30 and the first radiation branch 20.

As shown in fig. 1 and 2, in some embodiments, the dual-band antenna 100 further includes a first support 60, a second support 70, and a third support 80, the first radiating branch 20 is disposed on the first support 60, the second radiating branch 30 is disposed on the second support 70, the third radiating branch 40 is disposed on the third support 80, and the substrate 10, the first support 60, the second support 70, and the third support 80 form a three-dimensional pedestal. The substrate 10 and the third support 80 are relatively spaced apart, and the first support 60 and the second support 70 are located between the third support 80 and the substrate 10.

Alternatively, the first, second and third radiation branches 20, 30 and 40 may be formed on the first, second and third supports 60, 70 and 80 by using a LAP process or an LSD process or an adhesive process. By arranging the first support 60, the second support 70 and the third support 80 to bear the first radiation branch 20, the second radiation branch 30 and the third radiation branch 40, the overall strength of the dual-frequency antenna 100 can be higher, the service life of the antenna can be prolonged, and the antenna can be conveniently installed, and certainly, the dual-frequency antenna 100 can be used without the first support 60, the second support 70 and the third support 80.

Optionally, the solid base frame is made of a plastic material, so that the weight of the dual-band antenna 100 can be reduced, for example, in some embodiments, the total weight of the dual-band antenna 100 is 0.5 g.

In some embodiments, the first bracket 60 and the second bracket 70 are disposed at the side of the first surface 10a of the substrate 10 and connected to the substrate 10, the first bracket 60 and the second bracket 70 are disposed at a distance, and the third bracket 80 is connected to an end of the first bracket 60 and the second bracket 70 away from the substrate 10. Alternatively, the first and second supports 60 and 70 are disposed perpendicular to the substrate 10, and the third support 80 is disposed parallel to the substrate 10. The third radiation branch 40 is disposed on a side of the third support 80 opposite to the substrate 10.

In some embodiments, the third support 80 is provided with a through hole 81, and the coupling end 22 of the first radiation branch 20 extends along the inner sidewall of the through hole 81 to the side of the third support 80 opposite to the substrate 10 to form a disk structure. This embodiment facilitates electromagnetic coupling between coupling end 22 and third radiating branch 40. It should be noted that the coupling end 22 is not limited to a disc structure, but may be a disc structure with other shapes, such as triangle, rectangle, trapezoid, ellipse, polygon or other irregular shapes.

As shown in fig. 8, fig. 8 shows the current distribution on the surface of the low-frequency antenna of the dual-band antenna 100 provided by the embodiment of the present invention when resonating, and it can be seen from fig. 8 that the current of the low-frequency antenna starts from the feeding point 11, flows from the feeding end 21 to the coupling end 22 along the first radiation branch 20, then flows to the third radiation branch 40 through electromagnetic coupling, and then flows to the ground point 12 through the second radiation branch 30 to form a loop, so that the three-dimensional space is effectively utilized, which is beneficial to reducing the size of the antenna.

As shown in fig. 9, fig. 9 shows the current distribution on the surface of the high-frequency antenna of the dual-band antenna 100 according to the embodiment of the present invention at resonance, and it can be seen from fig. 9 that the current of the high-frequency antenna is concentrated on the first radiating branch 20 and the surface formed by the feeding point 11 and the grounding point 12.

As shown in fig. 10, what fig. 10 demonstrates is the equivalent circuit diagram of dual-band antenna 100 that the embodiment of the utility model provides, because the electric current of low frequency antenna is from the feed point, follow first radiation minor matters from feed end flow direction coupling end, then through electromagnetic coupling to third radiation minor matters, then through second radiation minor matters to ground point formation loop, antenna equivalent circuit has constituteed third order LC resonant circuit, electromagnetic coupling between third radiation minor matters and the first radiation minor matters coupling end can be equivalent to series capacitance, compare with the equivalent circuit of traditional left hand antenna, a series inductance has been increased at the feed end, third order LC resonant circuit's resonance bandwidth can be greater than second order LC resonant circuit. Compare in traditional left hand antenna, the utility model discloses the scheme can effectively expand the bandwidth of antenna.

As shown in fig. 11, fig. 11 shows an S11 parameter diagram of the dual-band antenna 100 according to the embodiment of the present invention, and it can be seen from fig. 11 that the S11 parameter of the 2.4GHz band is less than-6 dB bandwidth month 100MHz, which can meet the use requirement.

As shown in fig. 12, in some embodiments, the dual-band antenna 100 further includes a metal adjustment sheet 101, and the metal adjustment sheet 101 is electrically connected to the feeding point 11 and the first radiation branch 20, and is disposed perpendicular to the first radiation branch 20. Alternatively, the metal adjustment sheet 101 is provided on the first surface 10a of the substrate 10. By providing the metal adjustment sheet 101, the impedance and resonance bandwidth of the dual band antenna 100 can be adjusted. Fig. 13 shows an effect of the size of the metal adjustment sheet 101 on the S11 parameter of the dual-band antenna 100 according to the embodiment of the invention after the metal adjustment sheet 101 is added.

As shown in fig. 14, in some embodiments, the dual-band antenna 100 further includes a guiding branch 102, the guiding branch 102 is disposed on a side of the first radiating branch 20 away from the second radiating branch 30, and the guiding branch 102 is spaced apart from the first radiating branch 20. Optionally, the lead branch 102 is electrically connected to the feed point 11. Optionally, the guide branches 102 are located on the separation line S and are arranged parallel to the first radiation branches 20. By arranging the guide branches 102, the maximum radiation direction of the antenna can be changed, and the front-to-back ratio is improved. This can be achieved, for example, by adding the above-described steering stub 102 when the 5.8GHz antenna pattern needs to be adjusted.

As shown in fig. 15, the dual-band antenna 100 shown in fig. 15 does not have the branch 102 and adds the radiation pattern of the branch 102, and it can be seen from fig. 15 that the front-to-back ratio of the maximum radiation direction of the dual-band antenna 100 is improved after the branch 102 is added.

It should be noted that the third radiation branch is not limited to be configured as the semi-closed structure, for example, in other embodiments, as shown in fig. 16, the third radiation branch 40' is a closed structure and is configured to surround the coupling end 22. The third radiating branch 40 'is exemplarily configured to be circular, but is not limited to be circular, and may also be triangular, rectangular, trapezoidal, elliptical, polygonal, or other irregular shapes as long as the third radiating branch 40' is a closed structure and is disposed around the coupling end 22. In this embodiment, the overall external shape of the dual band antenna 100 may be designed to be cylindrical, so that the overall size of the dual band antenna 100 is more compact.

In some embodiments, the length, width, and height of dual-band antenna 100 are 11mm ± 1mm, 10mm ± 1mm, and 10mm ± 1mm, respectively. That is, the dual band antenna 100 can be made small in overall size by adopting the above-described structure.

As shown in fig. 17, the embodiment of the present invention further provides a remote controller 200, where the remote controller 200 includes a remote controller main body 201 and the dual-band antenna 100, and the dual-band antenna 100 is installed inside the remote controller main body 201. The remote controller 200 in this embodiment adopts the dual-band antenna 100, and the dual-band antenna 100 has a smaller size and a lower low profile compared with a conventional vertical polarization antenna, and can be installed inside the remote controller main body 201, and the remote controller 200 does not need to be provided with an external antenna, so that the overall size of the remote controller 200 is smaller, the thickness is thinner, and the remote controller 200 does not have the unfolding and folding actions of the antenna when in use, so that the remote controller is more convenient to use.

In some embodiments, the third radiating branch 40 is a semi-closed structure and is disposed around the coupling end 22, and the first radiating branch 20 includes a first side 201a close to the front end of the remote controller main body 201 and a second side close to the rear end 201b of the remote controller main body 201, wherein the notch 40a of the semi-closed structure is disposed on the first side, and the second radiating branch 30 is disposed on the second side. In this embodiment, the maximum radiation direction of the remote controller 200 is in the front end direction of the remote controller main body 201. In this embodiment, the notch 40a of the third radiating branch 40 faces the front end of the remote controller main body 201, and the notch 40a may bias the maximum radiation direction of the dual-band antenna 100 toward the front end of the remote controller main body 201.

As shown in fig. 3 and 17, in some embodiments, the third radiating branch 40 is divided into two symmetrical parts by a separation line S on which the first radiating branch 20 is located, wherein the separation line S extends in the front-rear direction of the remote controller main body 201.

As shown in fig. 17, in some embodiments, the remote controller 200 further includes two rocker mechanisms 202, the two rocker mechanisms 202 are respectively disposed on two sides of the front end of the remote controller main body 201, the number of the dual-band antennas 100 is two, the two dual-band antennas 100 are disposed between the two rocker mechanisms 202, and a connection line L of the first radiating branch 20 and the second radiating branch 30 of one dual-band antenna 100 and a connection line L of the first radiating branch 20 and the second radiating branch 30 of the other dual-band antenna 100 intersect at the front side 201a of the remote controller main body 201. The maximum radiation direction of the dual-band antenna 100 is deflected toward one side of the rocker mechanism 202 due to the influence of the rocker mechanism 202 on the maximum radiation direction of the dual-band antenna 100, which is expected to be toward the front of the remote controller 200 during actual use. As can be seen from the above description, the maximum radiation direction of the dual-band antenna 100 is deviated to the direction of the connection line L between the second radiation branch 30 and the first radiation branch 20, in this embodiment, the connection line L between the first radiation branch 20 and the second radiation branch 30 of one of the dual-band antennas 100 and the connection line L between the first radiation branch 20 and the second radiation branch 30 of the other dual-band antenna 100 are arranged to intersect at the front side of the remote controller main body 201, that is, the maximum radiation direction of the dual-band antenna 100 can be guided by adjusting the position of the second radiation branch 30 relative to the first radiation branch 20, so as to overcome the problem that the maximum radiation direction of the dual-band antenna 100 is deviated towards one side of the rocker mechanism 202, and finally, the maximum radiation direction of the dual-band antenna 100 is deviated towards the front of the remote controller main body 201.

In some embodiments, a connection line L between the first radiation branch 20 and the second radiation branch 30 of one of the dual-band antennas 100 and a connection line L between the first radiation branch 20 and the second radiation branch 30 of the other dual-band antenna 100 are symmetrically disposed with respect to the central axis M of the remote controller main body 201, and an intersection point of the two connection lines L is located on the central axis M of the remote controller main body 201.

In other embodiments, the connection line L between the first radiating branch 20 and the second radiating branch 30 of one of the dual-band antennas 100 and the connection line L between the first radiating branch 20 and the second radiating branch 30 of the other dual-band antenna 100 are asymmetrically disposed with respect to the central axis M of the remote controller main body 201. Simulation shows that when the two connecting lines L are asymmetrically arranged with respect to the central axis M of the remote controller main body 201, the isolation between the two dual-band antennas 100 can be improved.

As shown in fig. 18, the embodiment of the present invention shown in fig. 18 provides the isolation of the two dual-band antennas 100 of the remote controller 200, and as can be seen from fig. 18, when the connection line L of the first radiation branch 20 and the second radiation branch 30 of one dual-band antenna 100 and the connection line L of the first radiation branch 20 and the second radiation branch 30 of the other dual-band antenna 100 are asymmetrically arranged with respect to the central axis M of the remote controller main body 201, the isolation of the two dual-band antennas 100 is improved by 5dB with respect to the symmetrically arranged mode.

In some embodiments, the midpoints of the two dual-band antennas 100 are spaced apart by 54mm ± 1mm. With the embodiment, the requirement of the isolation degree of the two dual-frequency antennas 100 can be met, and the space of the remote controller 200 can be reasonably utilized, for example, the isolation degree between the 2.4GHz frequency antennas of the two dual-frequency antennas 100 can reach more than 13 dB.

As shown in fig. 19, the embodiment of the utility model also provides an unmanned aerial vehicle system 300, and unmanned aerial vehicle system 300 that proposes includes unmanned aerial vehicle 301 and foretell remote controller 200, and remote controller 200 is used for remote control unmanned aerial vehicle 301. Illustratively, the drone 301 may be a rotary wing drone 301, such as a quad-rotor drone 301, a hexa-rotor drone 301, an octa-rotor drone 301, or a fixed wing drone 301.

Of course, the remote controller 200 proposed above is not limited to be used for controlling the drone 301, and in other usage scenarios, the remote controller 200 proposed above may also be used for remote control of electronic devices such as a drone vehicle, a drone ship, a robot, an electronic toy, and the like.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (14)

1. The utility model provides a dual-frenquency antenna for the remote controller, the remote controller can establish communication connection with unmanned aerial vehicle, its characterized in that, dual-frenquency antenna includes:

the substrate is provided with a feeding point and a grounding point;

the first radiation branch section comprises a feed end and a coupling end opposite to the feed end, and the feed end is electrically connected with the feed point;

the second radiation branch node comprises a grounding end and a connecting end opposite to the grounding end, the grounding end is electrically connected with the grounding point, and the second radiation branch node and the first radiation branch node are arranged at intervals;

the third radiation branch knot is electrically connected with the connecting end and is electromagnetically coupled with the coupling end;

the first radiation branch is used for radiating high-frequency electromagnetic waves, and the first radiation branch, the second radiation branch and the third radiation branch are used for radiating low-frequency electromagnetic waves.

2. The dual-band antenna of claim 1, wherein the third radiating branch is spaced apart from the substrate, and the first radiating branch and the second radiating branch are both located between the third radiating branch and the substrate; and/or the presence of a gas in the gas,

the first radiation branch is parallel to the second radiation branch, the first radiation branch is perpendicular to the substrate, and the plane where the third radiation branch is located and the plane where the second radiation branch is located are mutually inclined or perpendicular.

3. The dual-band antenna of claim 1, wherein said third radiating stub is bent relative to said second radiating stub in a direction proximate to said coupling end.

4. The dual-band antenna of claim 1, wherein said third radiating branch is a semi-closed structure disposed around said coupling end, and wherein said second radiating branch and said semi-closed structure have notches located on opposite sides of said first radiating branch.

5. The dual-band antenna of claim 4, wherein the third radiating branch comprises:

a first extension part electrically connected with the connection terminal;

one end of the second extension part is electrically connected with one end of the first extension part;

one end of the third extending part is electrically connected with the other end of the first extending part;

the second extension part is parallel to the third extension part, the second extension part is perpendicular to the first extension part, and the notch is formed by one end of the second extension part, which is far away from the first extension part, and one end of the third extension part, which is far away from the first extension part.

6. The dual-band antenna of claim 1, wherein said third radiating stub is a closed structure disposed around said coupling end; and/or the presence of a gas in the gas,

the third radiation branch is divided into two symmetrical parts by a separation line, and the first radiation branch is positioned on the separation line.

7. The dual-band antenna of claim 6, wherein a line connecting said first radiating branch and said second radiating branch forms an angle with said dividing line.

8. The dual-band antenna of claim 1, further comprising a metal tuning tab electrically connected to said feed point and to said first radiating branch and disposed perpendicular to said first radiating branch; and/or the presence of a gas in the gas,

the dual-frequency antenna also comprises a guide branch knot, the guide branch knot is arranged on one side, away from the second radiation branch knot, of the first radiation branch knot, and the guide branch knot and the first radiation branch knot are arranged at intervals; and/or the presence of a gas in the gas,

the first radiation branch knot is arranged on a first support, the second radiation branch knot is arranged on a second support, the third radiation branch knot is arranged on a third support, the substrate, the first support, the second support and the third support form a three-dimensional base frame, the substrate and the third support are arranged at intervals relatively, and the first support and the second support are located between the third support and the substrate.

9. The dual-band antenna of claim 8, wherein the first radiating branch, the second radiating branch, and the third radiating branch are formed on the base frame using an LAP process, an LSD process, or an adhesive process.

10. A remote controller comprising a remote controller main body and the dual-band antenna of any one of claims 1 to 9, the dual-band antenna being mounted inside the remote controller main body.

11. The remote control of claim 10, wherein the third radiating branch is a semi-closed structure disposed around the coupling end;

first radiation branch knot is including being close to the first side of the front end of remote controller main part and being close to the second side of the rear end of remote controller main part, wherein, semi-enclosed structure's breach is located first side, second radiation branch knot is located second side.

12. The remote controller of claim 10, wherein the third radiating branch is divided into two symmetrical parts by a dividing line, the first radiating branch being located on the dividing line, wherein the dividing line extends in a front-to-rear direction of the remote controller main body.

13. The remote controller according to claim 12, wherein the remote controller further comprises two rocker mechanisms, the two rocker mechanisms are respectively disposed at two sides of the front end of the remote controller main body, the number of the dual-band antennas is two, and the two dual-band antennas are disposed between the two rocker mechanisms;

and the connecting line of the first radiation branch and the second radiation branch of one dual-frequency antenna and the connecting line of the first radiation branch and the second radiation branch of the other dual-frequency antenna are crossed at the front side of the remote controller main body.

14. A drone system comprising a drone and a remote control of any one of claims 10 to 13, the remote control being for remotely controlling the drone.

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