CN213845482U

CN213845482U - Unmanned plane

Info

Publication number: CN213845482U
Application number: CN202022633825.0U
Authority: CN
Inventors: 李栋; 马超; 房牧
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-07-30
Anticipated expiration: 2030-11-13

Abstract

The utility model discloses an unmanned aerial vehicle, including fuselage, horn, foot rest and antenna module, the fuselage is connected to the horn, the horn is connected to the foot rest, the antenna module is used for receiving or launches the radio frequency signal of two at least frequency channels, the antenna module includes at least one first antenna radiating element and at least one second antenna radiating element, first antenna radiating element has first polarization direction, first antenna radiating element installs at the horn, second antenna radiating element has second polarization direction, first polarization direction is different from second polarization direction, second antenna radiating element installs at the foot rest. Above-mentioned unmanned aerial vehicle through rationally utilizing unmanned aerial vehicle's spatial layout, places the antenna radiation unit of different polarization directions in different fuselage positions, and reducible polarization mismatch's probability improves unmanned aerial vehicle's communication stability and reliability.

Description

Unmanned plane

Technical Field

The utility model relates to an unmanned aerial vehicle communication technology field, in particular to unmanned aerial vehicle.

Background

In the correlation technique, when unmanned aerial vehicle flies, need communicate with the control end, receive the flight control instruction of control end and then carry out the adjustment of flight state, send unmanned aerial vehicle's real-time picture signal transmission for the control end so that the user can watch the effect of taking photo by plane in real time. The drone has an antenna to receive and transmit signals in communication with the control terminal.

However, the prior art drone antenna is typically a single polarized antenna, such as a vertically polarized antenna. When the unmanned aerial vehicle flies, the attitude of the unmanned aerial vehicle can be changed in real time, and particularly the attitude of the unmanned aerial vehicle passing through is changed greatly, so that the problem of polarization mismatch between an antenna of the unmanned aerial vehicle and an antenna of a control end is easily caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses embodiment provides an unmanned aerial vehicle.

The embodiment of the utility model provides a pair of unmanned aerial vehicle, include:

a body;

the machine arm is connected with the machine body;

the foot stand is connected with the machine arm; and

an antenna assembly for receiving or transmitting radio frequency signals in at least two frequency bands, the antenna assembly comprising:

at least one first antenna radiating element having a first polarization direction, the first antenna radiating element being mounted to the horn; and

at least one second antenna radiating element having a second polarization direction, the first polarization direction being different from the second polarization direction, the second antenna radiating element being mounted on the foot rest.

Above-mentioned unmanned aerial vehicle through rationally utilizing unmanned aerial vehicle's spatial layout, places the antenna radiation unit of different polarization directions in different fuselage positions, and reducible polarization mismatch's probability improves unmanned aerial vehicle's communication stability and reliability.

In some embodiments, the first polarization direction comprises a horizontal polarization direction and the second polarization direction comprises a vertical polarization direction.

In some embodiments, the first polarization direction comprises a left-hand polarization direction and the second polarization direction comprises a right-hand polarization direction; or

The first polarization direction comprises a right-hand polarization direction and the second polarization direction comprises a left-hand polarization direction.

In some embodiments, the horn comprises a rear horn, the first antenna radiating element being mounted to the rear horn.

In some embodiments, the number of the first antenna radiating elements is at least two, the number of the rear arms is at least two, and each of the first antenna radiating elements is mounted on a corresponding one of the rear arms.

In some embodiments, the axis of the first antenna radiating element is parallel to the horizontal plane.

In some embodiments, the stand comprises a front stand to which the second antenna radiating element is mounted.

In some embodiments, the number of the second antenna radiation units is at least two, the number of the front foot stands is at least two, and each of the second antenna radiation units is mounted on a corresponding one of the front foot stands.

In some embodiments, the axis of at least one of the second antenna radiating elements is parallel to the direction of gravity, and the axis of at least one other of the second antenna radiating elements is inclined with respect to the direction of gravity.

In some embodiments, the axis of the second antenna radiating element is inclined with respect to the gravity direction by an angle of 30 degrees ± 2 degrees.

In some embodiments, the antenna assembly comprises:

at least one first circuit board including first and second opposite faces, each of the first antenna radiating elements being mounted on the first face of a corresponding one of the first circuit boards;

at least one second circuit board, where the second circuit board includes a third surface and a fourth surface that are opposite to each other, and each second antenna radiation unit is installed on the third surface of a corresponding one of the second circuit boards; and

a functional circuit provided on at least one of the first surface, the second surface, the third surface, and the fourth surface, the functional circuit including an installation part and a connection part, the connection part being connected to the installation part, the installation part being used to install a functional part, the connection part being formed with a discontinuity such that the connection part includes a first part and a second part that are spaced apart, the first part and the second part being connected by a decoupling connection device;

the decoupling connection means is for electrically connecting the first part and the second part at an operating frequency of the functional circuit and for equivalently disconnecting at the operating frequency of the first antenna radiating element and/or the second antenna radiating element.

In some embodiments, the functional circuit is a light emitting circuit and the functional element is a light source.

In some embodiments, the light source comprises a light emitting circuit.

In some embodiments, the connection extends at least partially parallel to a length direction of the first and/or second antenna radiating element.

In some embodiments, the length of the first portion and the length of the second portion are both less than a preset length threshold.

In some embodiments, the preset length threshold is a quarter wavelength of an operating frequency of the first antenna radiating element or the second antenna radiating element.

In some embodiments, the functional circuit is disposed on the second side, and the first antenna radiating element and the functional circuit have an overlapping area on an orthographic projection plane of the first circuit board; and/or

The functional circuit is arranged on the fourth surface, and the second antenna radiation unit and the functional circuit have an overlapping area on the orthographic projection surface of the second circuit board.

In some embodiments, the functional circuit includes at least two of the mounting portions, the at least two mounting portions are arranged along a length direction of the first antenna radiating element or the second antenna radiating element, and one of the connecting portions is connected between two adjacent mounting portions.

In some embodiments, the functional circuit includes a first functional circuit and a second functional circuit, the first functional circuit is provided on the first surface and/or the third surface, the second functional circuit is provided on the second surface and/or the fourth surface, and the first functional circuit and the second functional circuit include the connecting portion and the mounting portion.

In some embodiments, the first antenna radiating element and the first functional circuit do not have an overlapping area on the orthographic projection of the first circuit board, and the first antenna radiating element and the second functional circuit do not have an overlapping area on the orthographic projection of the first circuit board; and/or

The second antenna radiation unit and the first functional circuit do not have an overlapping area on the orthographic projection surface of the second circuit board, and the second antenna radiation unit and the second functional circuit do not have an overlapping area on the orthographic projection surface of the second circuit board.

In some embodiments, the connection portion of the first functional circuit and the connection portion of the second functional circuit are disposed proximate to the first antenna radiating element or the second antenna radiating element.

In some embodiments, the decoupling connector includes at least one of an inductor, a filter, and a filter circuit.

In some embodiments, a difference between a self-resonant frequency of the inductor and an operating frequency of the first antenna radiating element or the second antenna radiating element is less than or equal to a preset frequency threshold.

In some embodiments, the filter comprises a low pass filter and the filtering circuit comprises a low pass filtering circuit.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic view of a partial structure of an unmanned aerial vehicle according to an embodiment of the present invention;

fig. 2 is a schematic side view of an unmanned aerial vehicle according to an embodiment of the present invention;

fig. 3 is an enlarged view of the portion X1 of fig. 1;

fig. 4 is an enlarged view of the portion X2 of fig. 1;

fig. 5 is a schematic structural diagram of an antenna assembly of an embodiment of the present invention;

fig. 6 is another schematic structural view of an antenna assembly of an embodiment of the present invention;

fig. 7 is a further schematic structural view of an antenna assembly according to an embodiment of the present invention;

fig. 8 is a further schematic structural view of an antenna assembly of an embodiment of the present invention;

fig. 9 is a standing wave curve diagram of the antenna assembly according to the embodiment of the present invention under different working conditions;

fig. 10 is a further schematic structural view of an antenna assembly of an embodiment of the present invention;

fig. 11 is an exploded view of an antenna assembly of an embodiment of the present invention;

fig. 12 is an enlarged view of the Y portion of fig. 11.

Description of the main elements of the drawings:

an unmanned aerial vehicle 1000;

a body 110, a head 111, a horn 130, a rear horn 131, a foot stand 150, a front foot stand 151, an antenna assembly 170, a first antenna radiation unit 171, a second antenna radiation unit 173;

a first circuit board 210, a first surface 211, a second surface 213, a second circuit board 230, a third surface 231, a fourth surface 233, a functional circuit 250, a mounting portion 251, a functional member 252, a connecting portion 253, a first portion 255, a second portion 257, a decoupling connecting device 270;

a first functional circuit 310, a second functional circuit 330.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The disclosure of the present invention provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Referring to fig. 1 and fig. 2, an unmanned aerial vehicle 1000 according to an embodiment of the present invention includes a body 110, a horn 130, a foot rest 150, and an antenna assembly 170. The horn 130 is coupled to the body 110. The foot stand 150 is connected to the horn 130. The antenna assembly 170 is used for receiving or transmitting radio frequency signals of at least two frequency bands. The antenna assembly 170 includes at least one first antenna radiating element 171 and at least one second antenna radiating element 173. The first antenna radiating element 171 has a first polarization direction. The first antenna radiating unit 171 is mounted on the horn 130. The second antenna radiating element 173 has a second polarization direction. The first polarization direction is different from the second polarization direction. The second antenna radiation element 173 is mounted to the foot stand 150. Optionally, the at least one first antenna radiating element 171 is a dipole antenna, and/or the at least one second antenna radiating element 173 is a dipole antenna.

Above-mentioned unmanned aerial vehicle 1000, through the spatial layout who rationally utilizes unmanned aerial vehicle 1000, place the antenna radiation unit of different polarization directions in different fuselage 110 positions, reducible polarization mismatch's probability improves unmanned aerial vehicle 1000's communication stability and reliability.

Under the condition that the first polarization direction is different from the second polarization direction, the directional diagram of the first antenna radiation unit 171 and the directional diagram of the second antenna radiation unit 173 also cover the range of different directions, so that the antenna radiation units have the overall directional diagrams with larger coverage, the directional diagrams of the whole attitude and the whole space of the unmanned aerial vehicle 1000 are easily covered, and the communication stability of the unmanned aerial vehicle 1000 can be ensured even if the unmanned aerial vehicle 1000 is in a moving state.

The antenna assembly 170 may receive and transmit radio frequency signals in a linearly polarized manner. Referring to fig. 2, in some embodiments, the first polarization direction includes a horizontal polarization direction, and the second polarization direction includes a vertical polarization direction. In this manner, the antenna assembly 170 can cover both radio frequency signals in the horizontal polarization direction and radio frequency signals in the vertical polarization direction. Here, the horizontal polarization direction means that the direction of the electric field intensity formed when the antenna radiates is parallel to the ground, and the vertical polarization direction means that the direction of the electric field intensity formed when the antenna radiates is perpendicular to the ground. In other embodiments, the first polarization direction comprises a polarization direction at +45 degrees from horizontal and the second polarization direction comprises a polarization direction at-45 degrees from horizontal. Through the wiring mode that adopts the linear polarization, can reduce the manufacturing degree of difficulty of antenna module 170, simplify antenna module 170's feed mode to reducible antenna module 170's volume is favorable to reducing the design restriction of unmanned aerial vehicle 1000 outward appearance. In other embodiments, the first antenna radiating element 171 and the second antenna radiating element 173 may adopt FPC (Flexible Printed Circuit) antennas, conformal antenna designs.

Alternatively, the antenna assembly 170 may receive and transmit radio frequency signals in a circular polarization manner. In particular, in certain embodiments, the first polarization direction comprises a left-hand polarization direction and the second polarization direction comprises a right-hand polarization direction. In further embodiments, the first polarization direction comprises a right-hand polarization direction and the second polarization direction comprises a left-hand polarization direction. In this manner, the antenna assembly 170 is guaranteed to receive radio frequency signals in all directions and transmit radio frequency signals in either direction.

It should be noted that, for the dipole antenna, the maximum directional pattern is substantially perpendicular to the length direction of the antenna radiation unit, and under the condition that the first polarization direction and the second polarization direction are different, directional pattern coverage of multiple different linear polarizations of the drone 1000 can be achieved.

In summary, by providing the first antenna radiation unit 171 and the second antenna radiation unit 173, the radio frequency signals in different polarization directions can be received and transmitted, even if the unmanned aerial vehicle 1000 is in a moving state, the antenna assembly 170 cannot be matched with the radio frequency signals due to the change of the relative position, and the stable communication of the unmanned aerial vehicle 1000 is ensured.

In addition, in other embodiments, the shapes of the first antenna radiation element 171 and the second antenna radiation element 173 may be the same, and may be different. In the case where the number of the first antenna radiation elements 171 is at least two, the shapes of all the first antenna radiation elements 171 may be completely the same, may be partially the same, or may be completely different. In the case where the number of the second antenna radiation elements 173 is at least two, the shapes of all the second antenna radiation elements 173 may be completely the same, may be partially the same, or may be completely different.

It should be noted that, in such an embodiment, the radio frequency signal can be sent to the unmanned aerial vehicle 1000 through the terminal device, so that the unmanned aerial vehicle 1000 acts according to the radio frequency signal when receiving the radio frequency signal, and the effects of controlling the unmanned aerial vehicle 1000 to move, switch the working state, and open and close the corresponding functions of the unmanned aerial vehicle 1000 are achieved. In one embodiment, the terminal device may transmit the radio frequency signal in the first polarization direction and the radio frequency signal in the second polarization direction, so that the terminal device may cooperate with the first antenna radiating element 171 and the second radiating element to achieve a good and stable communication effect. Terminal devices include, but are not limited to, cell phones, tablets, servers, personal computers, wearable smart devices, other electronic devices, and the like.

Referring to fig. 1, in some embodiments, the horn 130 includes a rear horn 131. The first antenna radiating element 171 is mounted on the rear arm 131. In this manner, the antenna assembly 170 facilitates reception and transmission of radio frequency signals in the first polarization direction.

Specifically, in the illustrated embodiment, the body 110 has a head 111, and the rear arm 131 is formed in a certain direction at a position of the body 110 distant from the head 111. The first antenna radiating element 171 is mounted on the rear horn 131 such that the first antenna radiating element 171 is located behind the drone 1000, thereby facilitating reception of radio frequency signals in the first polarization direction.

In addition, referring to fig. 1 and 2, in some embodiments, the number of the first antenna radiating elements 171 is two, the number of the rear arms 131 is two, and each first antenna radiating element 171 is mounted on a corresponding one of the rear arms 131. The two rear arms 131 extend in different directions on the surface of the main body 110, so as to increase the coverage of the antenna assembly 170 for the radio frequency signals in the first polarization direction. In one embodiment, the angle formed between the axes of the rear arm 131 and the main body 110 may be 60 degrees, so that the angle formed between the maximum directivity patterns corresponding to the two first antenna radiation units 171 is 60 degrees.

It is understood that in other embodiments, the number of the rear arms 131 may be three, four and more than four, the number of the first antenna radiation elements 171 may be three, four and more than four, and the number of the first antenna radiation elements 171 corresponds to the number of the rear arms 131. The number of the rear arm 131 and the first antenna radiating element 171 may be determined according to a specific embodiment or calibrated through an actual test, and other embodiments are not limited herein.

Referring to fig. 2, in some embodiments, the axis of the first antenna radiating element 171 is parallel to the horizontal plane. In this manner, the first antenna radiation unit 171 can be caused to receive and transmit radio frequency signals in the horizontally polarized direction.

Specifically, referring to fig. 1, in the case that the drone 1000 is in the hovering state, the main body 110 is in a relatively static state along the horizontal direction, and the axis of the first antenna radiation unit 171 is made parallel to the horizontal plane, so that the antenna assembly 170 can receive the radio frequency signal in the horizontal polarization direction and transmit the radio frequency signal in the horizontal polarization direction when the drone 1000 is in the hovering state.

Referring to fig. 1, in some embodiments, the stand 150 includes a front stand 151. The second antenna radiation unit 173 is mounted on the front stand 151. In this manner, the antenna assembly 170 facilitates reception and transmission of radio frequency signals in the second polarization direction.

Specifically, in the illustrated embodiment, the body 110 has a head 111, and a horn connected to the front foot frame 151 is formed in a certain direction at a position of the body 110 adjacent to the head 111. The second antenna radiation unit 173 is mounted on the front foot stand 151, so that the second antenna radiation unit 173 is located in a position in front of the drone 1000, thereby facilitating reception of radio frequency signals in a second polarization direction.

In addition, referring to fig. 1 and 2, in some embodiments, the number of the second antenna radiation units 173 is two, the number of the front leg frames 151 is two, and each second antenna radiation unit 173 is mounted on a corresponding one of the front leg frames 151. The two forward legs 151 extend in different directions on the surface of the main body 110, so as to increase the coverage of the antenna assembly 170 for the rf signals in the second polarization direction.

It is understood that in other embodiments, the number of the front leg frames 151 may be three, four, and more than four, the number of the second antenna radiation units 173 may be three, four, and more than four, and the number of the second antenna radiation units 173 corresponds to the number of the front leg frames 151. The number of the front leg frame 151 and the second antenna radiation unit 173 may be determined according to a specific embodiment, or calibrated through an actual test, and the other embodiments are not limited herein.

Referring to fig. 1, 3 and 4, in some embodiments, an axis of at least one second antenna radiating element 173 is parallel to a direction of gravity, and an axis of at least one other second antenna radiating element 173 is inclined with respect to the direction of gravity. As such, the drone 1000 may be enabled to receive and transmit radio frequency signals in the second polarization direction both in the motion state and in the hover state.

Specifically, in the embodiment shown in fig. 1, the number of the second antenna radiation units 173 is two, and with reference to fig. 3 and fig. 4, the axis of one of the second antenna radiation units 173 is parallel to the direction of gravity, and the axis of the other second antenna radiation unit 173 is inclined with respect to the direction of gravity. In the hovering state of the drone 1000, the axis of one of the second antenna radiation units 173 is parallel to the direction of gravity, so that the antenna assembly 170 can receive and transmit radio frequency signals in the vertical polarization direction. In the case where the drone 1000 is in motion, since the drone 1000 may be tilted at an angle relative to the direction of gravity to realize motion, the axis of the second antenna radiation unit 173 may be parallel to the direction of gravity, so that the antenna assembly 170 may receive and transmit the radio frequency signal in the vertical polarization direction. The axis of the second antenna radiation unit 173 is parallel to the gravity direction, which may mean that there is no angle between the axis of the second antenna radiation unit 173 and the gravity direction, or that the angle formed between the axis of the second antenna radiation unit 173 and the gravity direction is within a preset range. In one embodiment, the predetermined range is 10 degrees or less.

Referring to fig. 4, in some embodiments, the axis of the second antenna radiating element 173 is inclined with respect to the gravity direction by an angle a of 30 ± 2 degrees. Thus, when the drone 1000 is in a moving state and is inclined relative to the direction of gravity, the radio frequency signal in the second polarization direction can also be received and transmitted.

Specifically, in one embodiment, the number of the second antenna radiation elements 173 is two, and an angle a formed by the axis of one second antenna radiation element 173 being inclined with respect to the gravity direction is 30 degrees. The angle formed by the inclination of the axis of the second antenna radiation element 173 with respect to the direction of gravity may be adjusted according to specific situations or calibrated through practical tests. In one embodiment, angle a is 30 degrees.

Referring to fig. 1, 5-8, in some embodiments, the antenna assembly 170 includes at least one first circuit board 210, at least one second circuit board 230, and functional circuitry 250. The first circuit board 210 includes a first side 211 and a second side 213 that are opposite. Each of the first antenna radiating elements 171 is mounted on the first face 211 of a corresponding one of the first circuit boards 210. The second circuit board 230 includes third and fourth opposing faces 231, 233. Each of the second antenna radiation units 173 is mounted on the third face 231 of a corresponding one of the second circuit boards 230. The functional circuit 250 is provided on at least one of the first surface 211, the second surface 213, the third surface 231, and the fourth surface 233. The functional circuit 250 includes a mounting portion 251 and a connecting portion 253. The connection portion 253 connects the mounting portions 251. The mounting portion 251 is used to mount the functional member 252. The connecting portion 253 is formed with a discontinuity such that the connecting portion 253 includes spaced first and

second portions

255, 257. The first portion 255 and the second portion 257 are connected by a decoupling connection means 270. The decoupling connection device 270 serves to electrically connect the first part 255 and the second part 257 at the operating frequency of the functional circuit 250 and to equally disconnect at the operating frequency of the first antenna radiating element 171 and/or the second antenna radiating element 173. In this way, on the one hand, the operation of the functional circuit 250 can be ensured, and on the other hand, the decoupling connection device 270 can reduce or avoid the adverse effect of the connection portion 253 on the performance of the first antenna radiation unit 171 and the second antenna radiation unit 173, so as to ensure that the antenna assembly 170 can operate normally.

Specifically, referring to fig. 5 and 6, on the first circuit board 210, the first antenna radiating unit 171 is disposed on the first surface 211, and the functional circuit 250 is disposed on the second surface 213, referring to fig. 7 and 8, on the second circuit board 230, the second antenna radiating unit 173 is disposed on the third surface 231, and the functional circuit 250 is disposed on the fourth surface 233. In one embodiment, the antenna assembly 170 operates at 2.4GHz and 5.8 GHz. In other embodiments, the antenna assembly 170 has at least two different frequency band operating frequencies, such that the antenna assembly 170 can receive or transmit a plurality of different frequency band radio frequency signals. In another embodiment, the operating frequency of the functional circuit 250 is less than or equal to 10 MHz.

It can be understood that, since the first portion 255 and the second portion 257 are electrically connected through the decoupling connection device 270, in the case that the functional circuit 250 receives a high-frequency radio frequency signal (relative to the operating frequency of the functional circuit 250), the radio frequency signal cannot be effectively transmitted between the first portion 255 and the second portion 257 due to the decoupling connection device 270, so that the influence of the coupling between the first antenna radiation unit 171 on the first circuit board 210 and the functional circuit 250 is reduced, and the influence of the coupling between the second first antenna radiation unit 171 on the second circuit board 230 and the functional circuit 250 is reduced, thereby reducing the influence on the radiation performance of the first antenna radiation unit 171 and the second antenna radiation unit 173.

Specifically, referring to fig. 9, the graph shown in fig. 9 is a comparison of standing wave ratios of ports in different situations. Wherein, curve a corresponds to the case where the functional circuit 250 is open (i.e. the first part 255 and the second part 257 are directly connected), curve B corresponds to the case where only the first antenna radiating element 171 is present (i.e. the functional circuit 250 is not provided), curve C corresponds to the case where the functional circuit 250 is open (i.e. the first part 255 and the second part 257 are directly disconnected), and curve D corresponds to the case of the embodiment of the present invention. The abscissa indicates frequency (GHz) and the ordinate indicates standing wave ratio (dB) of the port. As can be seen from the figure, the first antenna radiating unit 171 according to the embodiment of the present invention can achieve good antenna performance even when the functional circuit 250 is present.

In addition, for the embodiment in which the first antenna radiation unit 171 is disposed on the first surface 211, the functional circuit 250 is disposed on the first surface 211, the first antenna radiation unit 171 is disposed on the first surface 211, the functional circuit 250 is disposed on the first surface 211 and the second surface 213, the second antenna radiation unit 173 is disposed on the third surface 231, the functional circuit 250 is disposed on the third surface 231, the second antenna radiation unit 173 is disposed on the third surface 231, and the functional circuit 250 is disposed on the third surface 231 and the fourth surface 233, specific principles thereof can refer to specific principles of the above embodiments, and will not be described in detail herein.

In other embodiments, the functional circuit 250 of the first circuit board 210 and the functional circuit 250 of the second circuit board 230 may be the same or different.

It should be noted that, referring to fig. 4 and 10, it can be understood that, by the position of the second antenna radiation unit 173 on the second circuit board 230, the axis of the second antenna radiation unit 173 can be inclined with respect to the gravity direction while the orientation of the whole structure of the second circuit board 230 is kept unchanged. In the case that the number of the second antenna radiation units 173 is plural, it is possible to ensure that each of the second antenna radiation units 173 can be connected to the front leg frame 151 in the same connection manner without additionally adjusting the installation position of the second antenna radiation units 173 on the front leg frame 151.

In some embodiments, the decoupling connector 270 includes at least one of an inductor, a filter, and a filter circuit. It can be appreciated that the inductor, filter and filter circuits have the functions of transmitting low frequency signals and blocking high frequency signals, such that when a radio frequency signal is received by the functional circuit 250, the radio frequency signal is blocked by the decoupling connector 270 and cannot be effectively transmitted along the functional circuit 250, and the operating frequency and the electrical signal in dc form with respect to the functional circuit 250 can be equivalently short-circuited, thereby not affecting the normal function of the functional circuit 250.

In some embodiments, the difference between the self-resonant frequency of the inductor and the operating frequency of the first antenna radiating element 171 or the second antenna radiating element 173 is less than or equal to a preset frequency threshold. The inductance has a high impedance at the self-resonant frequency, and an equivalent open circuit for the radio frequency signal can be formed by selecting the inductance with the self-resonant frequency near the operating frequency of the first antenna radiating element 171 or the second antenna radiating element 173.

Specifically, the preset frequency threshold may be adjusted according to the operating frequency of the first antenna radiating element 171 or the second antenna radiating element 173, or calibrated through an actual test.

In some embodiments, the filter comprises a low pass filter and the filtering circuit comprises a low pass filtering circuit. In this way, a high-frequency blocking effect of the decoupling connector 270 on the radio-frequency signal is also ensured.

In some embodiments, the functional circuit 250 is a light emitting circuit. The feature 252 is a light source.

Specifically, in one embodiment, the light emitting circuit comprises a signal shaping amplification driving circuit, a power supply voltage stabilizing circuit, a constant current circuit and an RC oscillator. The light source is a luminous LED lamp. The luminous LED lamp can be formed with a plurality of pixel points, and the luminous circuit can control each luminous LED lamp to light up or light down. Additionally, in some embodiments, the light source also includes a light emitting circuit.

Referring to fig. 5 and 6, in some embodiments, the connecting portion 253 extends at least partially parallel to the length direction of the first antenna radiating element 171. Thus, the connection portion 253 and the first antenna radiation unit 171 can be easily processed.

It is understood that the connection portion 253 at least partially extends in parallel to the longitudinal direction of the first antenna radiation element 171, the first portion 255 extends in parallel to the longitudinal direction of the first antenna radiation element 171, the second portion 257 extends in parallel to the longitudinal direction of the first antenna radiation element 171, and the first portion 255 and the second portion 257 extend in parallel to the longitudinal direction of the first antenna radiation element 171. In the illustrated embodiment, the length direction of the first antenna radiation unit 171 is parallel to the horizontal direction.

In other embodiments, referring to fig. 7 and 8, the connection portion 253 may extend at least partially in parallel to the longitudinal direction of the second antenna radiation unit 173, so that the connection portion 253 and the second antenna radiation unit 173 may be conveniently processed, or may extend at least partially in parallel to the longitudinal direction of the first antenna radiation unit 171 and the second antenna radiation unit 173, so that the connection portion 253, the first antenna radiation unit 171, and the second antenna radiation unit 173 may be conveniently processed. The specific principle is similar to or the same as that of the above embodiments, and is not described in detail herein.

In some embodiments, the length of the first portion 255 and the length of the second portion 257 are both less than a preset length threshold.

Specifically, the preset length threshold may be adjusted according to the operating frequency of the first antenna radiating element 171 or the second antenna radiating element 173. In one embodiment, the preset length threshold is a quarter wavelength of the operating frequency of the first antenna radiating element 171, so that the lengths of the first portion 255 and the second portion 257 can be prevented from being greater than the quarter wavelength of the operating frequency of the first antenna radiating element 171, so that coupling between the first antenna radiating element 171 and the functional circuit 250 is formed at a high frequency radio frequency signal, and energy loss is generated. In some embodiments, the preset length threshold may be in the range of [8,10] mm. It is understood that in other embodiments, the preset length threshold is a quarter wavelength of the operating frequency of the second antenna radiating element 173. The specific principle is similar or identical to that of the above-described embodiment, and is not expanded in detail here.

In addition, in other embodiments, the length of the connection portion 253 is not equal to one-quarter wavelength of the operating frequency of the first antenna radiation unit 171, nor one-half wavelength of the operating frequency of the first antenna radiation unit 171.

Referring to fig. 5 and 6, in some embodiments, the functional circuit 250 is disposed on the second side 213, and the first antenna radiating unit 171 and the functional circuit 250 have an overlapping area on the front projection surface of the first circuit board 210. Thus, the size of the first circuit board 210 can be reduced.

Specifically, referring to fig. 5 and fig. 6, the first antenna radiating unit 171 disposed on the first surface 211 and the functional circuit 250 disposed on the second surface 213 form an overlapping region along a projection in a direction perpendicular to the first circuit board 210. It can be understood that by adjusting the positions of the first antenna radiation unit 171 and the functional circuit 250 on the first circuit board 210, the size of the overlapping area can be adjusted, and thus the size of the first circuit board 210 can be conveniently adjusted, thereby facilitating the reduction of the size of the antenna assembly 170. In the illustrated embodiment, the front projection surface of the first circuit board 210 refers to a projection surface formed in a direction perpendicular to the first circuit board 210, and the front projection surface of the second circuit board 230 refers to a projection surface formed in a direction perpendicular to the second circuit board 230.

In addition, it is understood that in other embodiments, the functional circuit 250 may be disposed on the fourth surface 233, and the second antenna radiation unit 173 and the functional circuit 250 have an overlapping area on the orthogonal projection surface of the second circuit board 230, so that the size of the second circuit board 230 may be reduced, or the functional circuit 250 may be disposed on the second surface 213 and the fourth surface 233, and the first antenna radiation unit 171 and the functional circuit 250 have an overlapping area on the orthogonal projection surface of the first circuit board 210, and the second antenna radiation unit 173 and the functional circuit 250 have an overlapping area on the orthogonal projection surface of the second circuit board 230, so that the sizes of the first circuit board 210 and the second circuit board 230 may be reduced. The specific principle is the same as or similar to that of the above-described embodiment. Other embodiments are not specifically limited herein.

Referring to fig. 11 and 12, in some embodiments, the functional circuit 250 includes at least two mounting portions 251. At least two mounting parts 251 are arranged in the length direction of the first antenna radiating unit 171. A connecting portion 253 is connected between two adjacent mounting portions 251. Referring to fig. 6, when the functional circuit 250 is a light emitting circuit, a plurality of functional elements 252 (light sources) disposed on the mounting portion 251 may form a light strip.

Specifically, referring to fig. 11 and 12, the first portion 255, the decoupling connecting device 270, and the second portion 257 are sequentially connected to form a connecting portion 253, and the connecting portion 253 is connected to one mounting portion 251 through the first portion 255 and is connected to the other mounting portion 251 through the second portion 257. The first portion 255 is in a three wire parallel configuration and the second portion 257 is in a three wire parallel configuration, with the number of decoupling connection devices 270 being three. Each wire of the first portion 255 is sequentially connected with one corresponding decoupling connecting device 270 and one corresponding wire of the second portion 257, so that the connecting portion 253 forms three parallel complete electrical connection structures, and thus, the electrical signal of the mounting portion 251 at one side of the connecting portion 253 can be transmitted to the mounting portion 251 at the other side of the connecting portion 253 through the three parallel electrical connection structures. In addition, in other embodiments, the number of the parallel electrical connection structures in the connection portion 253 may be one or two or more than three, and is not particularly limited herein.

In the embodiment shown in fig. 11, the number of the mounting portions 251 is 5, and the number of the connecting portions 253 is 4. The 5 mounting parts 251 are sequentially arranged in the longitudinal direction of the first antenna radiating unit 171, and a connecting part 253 is connected between every two adjacent mounting parts 251, so that an electrical signal can be transmitted between the two mounting parts 251 which are farthest apart in the longitudinal direction of the first antenna radiating unit 171.

In addition, in the case that the connection portion 253 transmits the electrical signal at the mounting portion 251 on one side to the mounting portion 251 on the other side, the connection area between the connection portion 253 and the first circuit board 210 can be increased, and the connection portion 253 is prevented from falling off the first circuit board 210.

In addition, in another embodiment, the functional circuit 250 includes at least two mounting portions 251, the at least two mounting portions 251 are arranged along the longitudinal direction of the second antenna radiation unit 173, and a connection portion 253 is connected between two adjacent mounting portions 251. The specific principle is similar to or the same as that of the above embodiments, and is not described herein again.

Referring to fig. 7 and 8, in some embodiments, the functional circuit 250 includes a first functional circuit 310 and a second functional circuit 330. The first functional circuit 310 is provided on the third surface 231. The second functional circuit 330 is disposed on the fourth face 233. The first and second

functional circuits

310 and 330 include a connecting portion 253 and a mounting portion 251. Thus, the applicability of the antenna assembly 170 can be improved.

Specifically, in the embodiments shown in fig. 7 and 8, there may be a region where the projections of the first functional circuit 310 and the second functional circuit 330 overlap each other along the orthogonal projection direction of the second circuit board 230. It will be appreciated that by providing the first functional circuit 310 and the second functional circuit 330, the antenna assembly 170 may be enabled to perform more functions (e.g., carry more functional components 252) without increasing the size of the second circuit board 230, thereby improving the applicability.

In other embodiments, it is understood that the first functional circuit 310 may be provided on the first surface 211 and the second functional circuit 330 may be provided on the second surface 213, or the first functional circuit 310 may be provided on the first surface 211 and the third surface 231 and the second functional circuit 330 may be provided on the second surface 213 and the fourth surface 233, thereby improving the applicability of the antenna assembly 170. The specific principle is similar to or the same as that of the above-described embodiment, and other embodiments are not specifically limited herein.

Referring to fig. 7 and 8, in some embodiments, the second antenna radiating element 173 and the first functional circuit 310 do not have an overlapping area on the front projection surface of the second circuit board 230. There is no overlapping area of the second antenna radiation element 173 and the second functional circuit 330 on the orthographic projection area of the second circuit board 230. In this way, the coupling effect of the second antenna radiating element 173 and the functional circuit 250 can be avoided or minimized.

In particular, in the embodiments shown in fig. 7 and 8, since the second antenna radiation unit 173 and the functional circuit 250 are easily coupled under high-frequency radio frequency signals, there is no overlapping area between the second antenna radiation unit 173 and the first functional circuit 310 on the orthographic projection surface of the second circuit board 230, and it can be avoided that the second antenna radiation unit 173 and the first functional circuit 310 are too close to each other to increase the coupling effect therebetween, and vice versa between the second antenna radiation unit 173 and the second functional circuit 330. In this case, the coupling effect between the second antenna radiation element 173 and the first functional circuit 310 may be reduced, and the coupling effect between the second antenna radiation element 173 and the second functional circuit 330 may be reduced. In one embodiment, the second antenna radiating element 173 is spaced apart from the first functional circuit 310 by a distance of 5mm on the orthographic projection area of the second circuit board 230.

In addition, it is understood that, in other embodiments, there may be no overlapping area between the first antenna radiation unit 171 and the first functional circuit 310 on the orthographic projection surface of the first circuit board 210, and no overlapping area between the first antenna radiation unit 171 and the second functional circuit 330 on the orthographic projection surface of the first circuit board 210, so as to reduce the coupling effect between the first antenna radiation unit 171 and the first and second

functional circuits

310 and 330, or there may be no overlapping area between the first antenna radiation unit 171 and the first functional circuit 310 on the orthographic projection surface of the first circuit board 210, no overlapping area between the first antenna radiation unit 171 and the second functional circuit 330 on the orthographic projection surface of the first circuit board 210, and no overlapping area between the second antenna radiation unit 173 and the first functional circuit 310 on the orthographic projection surface of the second circuit board 230. There is no overlapping area of the second antenna radiation element 173 and the second functional circuit 330 on the orthographic projection plane of the second circuit board 230, so that the effect of reducing the coupling between the first antenna radiation element 171 and the first and second

functional circuits

310 and 330 and the effect of reducing the coupling between the second antenna radiation element 173 and the first and second

functional circuits

310 and 330 can be achieved. The principles of the embodiments may be referred to in the detailed description of the embodiments above and are not detailed here to avoid redundancy.

Referring to fig. 7 and 8, in some embodiments, the connection portion 253 of the first functional circuit 310 and the connection portion 253 of the second functional circuit 330 are disposed near the second antenna radiation unit 173. Thus, the coupling effect can be further reduced.

Specifically, in the area where the second antenna radiation element 173 and the first functional circuit 310 are formed on the orthographic projection of the second circuit board 230, the first functional circuit 310 is provided with two decoupling connection devices 270 in a direction close to the second antenna radiation element 173, further reducing the coupling between the connection portion 253 of the first functional circuit 310 and the second antenna radiation element 173. The second functional circuit 330 is provided with two decoupling connection devices 270 in a direction close to the second antenna radiation element 173, further reducing the coupling between the connection 253 of the second functional circuit 330 and the second antenna radiation element 173.

Further, it is understood that in the embodiment shown in fig. 7, the first functional circuit 310 may determine whether the decoupling connection device 270 needs to be provided or not depending on the wiring length of the connection portion 253. In one embodiment, the first functional circuit 310 is provided with one decoupling connection device 270 in a direction close to the second antenna radiating element 173.

In addition, it is understood that in other embodiments, the connection portion 253 of the first functional circuit 310 and the connection portion 253 of the second functional circuit 330 are disposed close to the first antenna radiation unit 171, so that a further reduction in coupling effect can be similarly achieved. The specific principle is similar to or the same as that of the above-described embodiment, and is not particularly limited herein.

In the description of the present specification, reference to the terms "one embodiment", "some embodiments", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An unmanned aerial vehicle, comprising:

a body;

the machine arm is connected with the machine body;

the foot stand is connected with the machine arm; and

2. The drone of claim 1, wherein the first polarization direction comprises a horizontal polarization direction and the second polarization direction comprises a vertical polarization direction.

3. The drone of claim 1, wherein the first polarization direction comprises a left-hand polarization direction and the second polarization direction comprises a right-hand polarization direction; or

4. The drone of claim 1, wherein the horn comprises a rear horn, the first antenna radiating element being mounted on the rear horn.

5. A drone according to claim 4, characterised in that the number of said first antenna radiating elements is at least two, and the number of said rear arms is at least two, each said first antenna radiating element being mounted on a corresponding one of said rear arms.

6. A drone according to claim 5, characterised in that the axis of the first antenna radiating element is parallel to the horizontal plane.

7. A drone according to claim 1, wherein the foot stand includes a front foot stand on which the second antenna radiating element is mounted.

8. The drone of claim 7, wherein the number of second antenna radiating elements is at least two, the number of front foot rests is at least two, and each second antenna radiating element is mounted on a corresponding one of the front foot rests.

9. A drone according to claim 8, characterised in that the axis of at least one of the second antenna radiating elements is parallel to the direction of gravity, and the axis of at least one other of the second antenna radiating elements is inclined with respect to the direction of gravity.

10. A drone according to claim 9, characterised in that the axis of the second antenna radiating element is inclined by an angle of 30 degrees ± 2 degrees with respect to the direction of gravity.

11. The drone of claim 1, wherein the antenna assembly comprises:

12. The drone of claim 11, wherein the functional circuit is a lighting circuit and the functional piece is a light source.

13. The drone of claim 12, wherein the light source comprises a lighting circuit.

14. A drone according to claim 11, characterised in that the connection extends at least partially parallel to the length direction of the first and/or second antenna radiating elements.

15. A drone according to claim 11, wherein the length of the first portion and the length of the second portion are both less than a preset length threshold.

16. A drone according to claim 15, wherein the preset length threshold is a quarter wavelength of the operating frequency of the first or second antenna radiating elements.

17. A drone according to claim 11, wherein the functional circuit is provided on the second face, there being an overlapping area of the first antenna radiating element and the functional circuit on the orthographic projection plane of the first circuit board; and/or

18. The unmanned aerial vehicle of claim 17, wherein the functional circuit comprises at least two of the installation parts, the at least two installation parts are arranged along a length direction of the first antenna radiation unit or the second antenna radiation unit, and one of the connection parts is connected between two adjacent installation parts.

19. The drone of claim 11, wherein the functional circuitry includes first and second functional circuitry, the first functional circuitry being provided on the first and/or third face, the second functional circuitry being provided on the second and/or fourth face, the first and second functional circuitry including the connecting portion and the mounting portion.

20. The drone of claim 19, wherein the first antenna radiating element and the first functional circuit do not have an overlapping area on the orthographic projection of the first circuit board, the first antenna radiating element and the second functional circuit do not have an overlapping area on the orthographic projection of the first circuit board; and/or

21. The drone of claim 19, wherein the connection portion of the first functional circuit and the connection portion of the second functional circuit are disposed proximate to the first antenna radiating element or the second antenna radiating element.

22. The drone of claim 11, wherein the decoupling connection device includes at least one of an inductance, a filter, and a filter circuit.

23. The drone of claim 22, wherein a difference between a self-resonant frequency of the inductance and an operating frequency of the first or second antenna radiating elements is less than or equal to a preset frequency threshold.

24. The drone of claim 22, wherein the filter comprises a low pass filter and the filter circuit comprises a low pass filter circuit.