CN210245717U

CN210245717U - Antenna module and unmanned aerial vehicle

Info

Publication number: CN210245717U
Application number: CN201921557231.7U
Authority: CN
Inventors: Dong Li; 李栋
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2020-04-03
Anticipated expiration: 2029-09-17

Abstract

The application discloses antenna module and unmanned aerial vehicle. The antenna assembly comprises a feed unit, a high-frequency radiation unit, a low-frequency radiation unit and an adjusting branch. One end of the high-frequency radiation unit is connected with the feed unit. One end of the low-frequency radiating unit is connected with the feed unit. One end of the adjusting branch is connected with the feed unit, and the difference value between the distance between the adjusting branch and the high-frequency radiation unit and one quarter of the wavelength corresponding to the center frequency of the high-frequency radiation unit is smaller than a preset threshold value. The antenna module of this application embodiment and unmanned aerial vehicle make high frequency radiation unit have stronger radiation intensity in the direction of keeping away from unmanned aerial vehicle through adding the regulation minor matters to reduce the energy of unmanned aerial vehicle to high frequency radiation unit's radiation signal reflection, make high frequency radiation unit have comparatively even radiation in the direction of keeping away from unmanned aerial vehicle.

Description

Antenna module and unmanned aerial vehicle

Technical Field

The application relates to the technical field of antennas, in particular to an antenna module and an unmanned aerial vehicle.

Background

Mobile devices such as unmanned aerial vehicles can carry on the multiband antenna to can combine the advantage of different frequency channels to realize more stable communication. The body of the drone usually comprises metal. When multiband antenna was installed on unmanned aerial vehicle, the metal material in the organism can reflect the signal of antenna radiation to influence the radiating effect of antenna.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an antenna module and unmanned aerial vehicle.

The antenna assembly of the embodiment of the application comprises a feed unit, a high-frequency radiation unit, a low-frequency radiation unit and a regulation branch. One end of the high-frequency radiation unit is connected with the feed unit. One end of the low-frequency radiation unit is connected with the feed unit. One end of the adjusting branch is connected with the feed unit, and the difference value between the distance between the adjusting branch and the high-frequency radiation unit and one quarter of the wavelength corresponding to the center frequency of the high-frequency radiation unit is smaller than a preset threshold value.

In some embodiments, the feeding unit includes a first side and a second side opposite to the first side, one end of the high-frequency radiating unit is connected to the first side of the feeding unit, one end of the low-frequency radiating unit is connected to the second side of the feeding unit, and the adjusting branch is disposed between the high-frequency radiating unit and the low-frequency radiating unit.

In some embodiments, a difference between the length of the adjusting branch and a quarter of a mean value of a wavelength corresponding to a center frequency of the high-frequency radiating element and a wavelength corresponding to a center frequency of the low-frequency radiating element is less than a first preset threshold.

In some embodiments, the difference between the width of the adjusting branch and the width of the high-frequency radiating unit is less than a second preset threshold.

In some embodiments, the low-frequency radiating unit includes multiple sections of low-frequency radiating structures, and the widths of the multiple sections of low-frequency radiating structures are gradually widened along a direction from the low-frequency radiating unit to the end of the low-frequency radiating unit away from the feed unit; and the width of the adjusting branch knot is gradually widened along the direction from one end of the adjusting branch knot connected with the feed unit to one end of the adjusting branch knot far away from the feed unit. In some embodiments, the distance between the adjustment stub and the high frequency radiating element is equal to the distance between the adjustment stub and the low frequency radiating element.

In some embodiments, the antenna assembly includes a dipole antenna, the number of the high-frequency radiating elements, the number of the low-frequency radiating elements, and the number of the adjusting branches are two, and the feeding element includes a feeding point and a grounding point; one end of one of the high-frequency radiating units is connected with the feed point, and one end of the other high-frequency radiating unit is connected with the grounding point; one end of one of the low-frequency radiating units is connected with the feed point, and one end of the other low-frequency radiating unit is connected with the grounding point; one end of one of the adjusting branches is connected with the feed point, and one end of the other adjusting branch is connected with the grounding point; the adjusting branch connected with the feed-in point is arranged between the high-frequency radiation unit connected with the feed-in point and the low-frequency radiation unit connected with the feed-in point; the adjusting branch connected with the grounding point is arranged between the high-frequency radiation unit connected with the grounding point and the low-frequency radiation unit connected with the grounding point.

In some embodiments, the antenna assembly further includes a dielectric body, and the high-frequency radiating element, the low-frequency radiating element, and the adjusting stub are disposed on the dielectric body.

In certain embodiments, the dielectric body comprises a first side and a second side opposite the first side; wherein: the high-frequency radiation unit, the low-frequency radiation unit and the adjusting branch are all arranged on the first surface; or the high-frequency radiation unit and the low-frequency radiation unit are both arranged on the first surface, and the adjusting branch is arranged on the second surface.

In some embodiments, the feeding unit further includes a first metal via, a second metal via, and a feeding line. The first metal through hole and the second metal through hole are arranged on the dielectric body. The first metal through holes and the second metal through holes are arranged on the dielectric body, the first metal through holes correspond to the feed-in points, the second metal through holes correspond to the grounding points, and the number of the first metal through holes and the number of the second metal through holes are one or more. The inner core of the feeder line is electrically connected with the first metal through hole, and the shielding layer of the feeder line is electrically connected with the second metal through hole.

In some embodiments, when the adjusting branches are disposed on the first surface, one end of one of the adjusting branches is directly electrically connected to the feeding point, and one end of the other adjusting branch is directly electrically connected to the grounding point; when the adjusting branches are arranged on the second surface, one end of one adjusting branch is electrically connected with the feed point through the first metal through hole, and one end of the other adjusting branch is electrically connected with the grounding point through the second metal through hole.

In some embodiments, the antenna assembly further comprises a support for supporting the feed line. The support includes support body, trough and fastener. The bracket body is arranged on the second surface. The wiring groove is formed in the support body, and the feeder line is partially contained in the wiring groove. The wire clamp is arranged on the support body and used for clamping the feeder line so as to fix the feeder line on the support.

In some embodiments, the extending direction of the wiring groove is inclined with respect to the long axis direction of the dielectric member.

In some embodiments, a first mounting member is provided on the dielectric body and a second mounting member is provided on the bracket body, and the bracket is mounted on the second face of the dielectric body when the first mounting member is mated with the second mounting member.

In some embodiments, the predetermined threshold is any value between wavelengths corresponding to the center frequency of the high-frequency radiating element of 0 to one eighth.

The unmanned aerial vehicle of this application embodiment includes foot rest and antenna module. The antenna assembly is mounted on the foot rest. The antenna assembly comprises a feed unit, a high-frequency radiation unit, a low-frequency radiation unit and an adjusting branch. One end of the high-frequency radiation unit is connected with the feed unit. One end of the low-frequency radiation unit is connected with the feed unit. One end of the adjusting branch is connected with the feed unit.

The antenna module of this application embodiment and unmanned aerial vehicle make high frequency radiation unit have stronger radiation intensity in the direction of keeping away from unmanned aerial vehicle through adding the regulation minor matters to reduce the energy of unmanned aerial vehicle to the signal reflection of high frequency radiation unit radiation, make high frequency radiation unit have comparatively even radiation in the direction of keeping away from unmanned aerial vehicle.

Additional aspects and advantages of embodiments of the present application 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 present application.

Drawings

The above and/or additional aspects and advantages of the present application 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 top view of an antenna assembly of an embodiment of the present application;

FIG. 2 is a bottom view of an antenna assembly of an embodiment of the present application;

FIG. 3 is a front view of an antenna assembly of an embodiment of the present application;

FIG. 4 is a top view of an antenna assembly of another embodiment of the present application;

FIG. 5 is a bottom view of an antenna assembly of another embodiment of the present application;

fig. 6 is a schematic diagram of the components of a drone according to an embodiment of the present application;

FIG. 7 is a graph of return loss for an antenna assembly with and without a tuning branch;

fig. 8 is a directional diagram of the high-frequency radiating element with and without the adjustment branches;

fig. 9 is a diagram of the low frequency radiating elements with and without the adjusted stubs.

Description of the main elements and symbols:

the unmanned aerial vehicle 100, the antenna assembly 100, the feed unit 11, the first side 1101, the second side 1102, the feed point 111, the ground point 112, the first metal through hole 113, the second metal through hole 114, the feed line 115, the inner core 1151, the insulating layer 1152, the shielding layer 1153, the sheath 1154, the first pad 1161, the second pad 1162, the low-frequency radiating unit 12, the high-frequency radiating unit 13, the adjusting branch 14, the dielectric body 15, the first surface 151, the second surface 152, the first mounting part 153, the bracket 16, the bracket body 161, the second mounting part 162, the wiring groove 163, the wire clamp 164, the foot rest 200, and the body 300.

Detailed Description

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

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1, an antenna assembly 100 is disclosed. The antenna assembly 100 includes a feeding unit 11, a high-frequency radiating unit 13, a low-frequency radiating unit 12, and a tuning branch 14. One end of the high-frequency radiation unit 13 is connected to the power feed unit 11. One end of the low-frequency radiating element 12 is connected to the feeding element 11. One end of the adjusting branch 14 is connected with the feed unit 11, and the difference between the distance between the adjusting branch 14 and the high-frequency radiation unit 13 and one quarter of the wavelength corresponding to the center frequency of the high-frequency radiation unit 13 is smaller than a preset threshold value.

The predetermined threshold value is a small value, and for example, the predetermined threshold value may be any value between wavelengths corresponding to the center frequencies of 0 to one eighth of the high-frequency radiating elements 13. That is, the distance between the adjusting branch 14 and the high-frequency radiating unit 13 is greater than or equal to the wavelength corresponding to the center frequency of the high-frequency radiating unit 13 of one eighth, and less than or equal to the wavelength corresponding to the center frequency of the high-frequency radiating unit 13 of three eighths. Preferably, the distance between the adjusting branch 14 and the high-frequency radiating unit 13 is one quarter of the wavelength corresponding to the center frequency of the high-frequency radiating unit 13. In one embodiment, the distance between the adjustment branch 14 and the high-frequency radiating unit 13 is one eighth of the wavelength corresponding to the center frequency of the high-frequency radiating unit 13. In one embodiment, the distance between the adjusting branch 14 and the high-frequency radiating unit 13 is three-eighths of the wavelength corresponding to the center frequency of the high-frequency radiating unit 13.

It can be appreciated that the body of the drone generally comprises metal. When installing the multifrequency section antenna on unmanned aerial vehicle, the metal material in the organism can reflect the antenna radiation's of each frequency channel signal, especially to the antenna of high frequency channel, the wavelength of the antenna radiation's of high frequency channel electromagnetic wave is shorter, is difficult to diffract the organism to make the organism of metal material stronger to the reflection effect of the signal of high frequency channel antenna, the influence to the radiation effect of the antenna of high frequency channel is bigger.

The antenna assembly 100 of the embodiment of the application makes the high-frequency radiating unit 13 have stronger radiation intensity in the direction away from the unmanned aerial vehicle 1000 by adding the adjusting branches 14, so that the energy of signal reflection radiated by the high-frequency radiating unit 13 by the unmanned aerial vehicle 1000 (shown in fig. 6) is reduced, and the high-frequency radiating unit 13 has more uniform radiation in the direction away from the unmanned aerial vehicle 1000.

Referring to fig. 1, the antenna assembly 100 of the present application includes a dielectric body 15, a feeding unit 11, a high-frequency radiating unit 13, a low-frequency radiating unit 12, a tuning branch 14, and a support 16. The antenna assembly 100 may be a dipole antenna, and the number of the high frequency radiating elements 13, the low frequency radiating elements 12, and the adjusting branches 14 is two.

The dielectric body 15 includes a first surface 151 and a second surface 152 opposite to the first surface 151. The dielectric member 15 can be made of plastic, glass, or composite material. The dielectric member 15 may serve as a mounting carrier for the feeding unit 11, the high-frequency radiating unit 13, the low-frequency radiating unit 12, and the adjusting stub 14. As shown in fig. 1, the two high-frequency radiating elements 13, the two low-frequency radiating elements 12, and the two adjusting branches 14 are disposed on the first surface 151.

Referring to fig. 1 and 2, the feeding unit 11 is used for feeding rf energy to the two high frequency radiating units 13, the two low frequency radiating units 12, and the two adjusting branches 14. The feeding unit 11 includes a feeding point 111, a grounding point 112, a first metal via 113, a second metal via 114, a first pad 1161, a second pad 1162, and a feeding line 115. The feeding unit 11 has a first side 1101 and a second side 1102 opposite to the first side 1101.

The feed point 111 is disposed on the first face 151 of the dielectric body 15. The first metal via 113 is disposed in the dielectric member 15, and the first metal via 113 corresponds to the feeding point 111. The first metal via 113 is filled with metal. The first pad 1161 is disposed at a position of the second face 152 corresponding to the first metal via 113. The first metal via 113 may be used to connect the feed point 111 and the first pad 1161.

The grounding point 112 is disposed on the first surface 151 of the dielectric body 15, the second metal via 114 is opened in the dielectric body 15, and the second metal via 114 corresponds to the grounding point 112. The second metal via 114 is filled with metal. The second pad 1162 is disposed at a position of the second face 152 corresponding to the second metal via 114. A second metal via 114 may be used to connect the ground point 112 and the second pad 1162.

The number of the first metal via 113 and the second metal via 114 may be one or more (two or more). In the embodiment of the present application, the number of the first metal vias 113 and the number of the second metal vias 114 are both multiple. The arrangement of the plurality of first metal through holes 113 can improve the uniformity of feeding, and can improve the reliability of connection between the feeding point 111 and the first metal through holes 113; similarly, the provision of a plurality of second metal vias 114 can also improve the uniformity of feeding, and can also improve the reliability of the connection between the ground point 112 and the second metal vias 114.

The feed line 115 includes an inner core 1151, an insulating layer 1152, a shielding layer 1153, and a sheath 1154, which are sequentially disposed from the inside to the outside. The inner core 1151, insulating layer 1152, shielding layer 1153, and sheath 1154 are coaxial.

The inner core 1151 is electrically connected to the first metal via 113. Illustratively, the inner core 1151 may be directly electrically connected to the first metal via 113; alternatively, the core 1151 may be electrically connected to the first metal via 113 indirectly through the first pad 1161. After the inner core 1151 is electrically connected to the first metal via 113, the inner core 1151 can be electrically connected to the feeding point 111 through the first metal via 113.

The shielding layer 1153 is electrically connected to the second metal via 114. For example, the shielding layer 1153 may be directly electrically connected to the second metal via 114; alternatively, the shielding layer 1153 may be electrically connected to the second metal via 114 indirectly through the second pad 1162. After the shielding layer 1153 is electrically connected to the second metal via 114, the shielding layer 1153 can be electrically connected to the ground point 112 through the second metal via 114.

An insulating layer 1152 is interposed between the inner core 1151 and the shielding layer 1153, and the insulating layer 1152 serves to isolate the inner core 1151 from the shielding layer 1153. The sheath 1154 surrounds the shield 1153, and the sheath 1154 may function to protect the shield 1153.

One end of the high-frequency radiation unit 13 is connected to the power feed unit 11. Specifically, one end of one high-frequency radiating element 13 is connected to the first side 1101 of the feed point 111, and one end of the other high-frequency radiating element 13 is connected to the first side 1101 of the ground point 112. The length of the high-frequency radiating unit 13 is related to the center wavelength of the high-frequency radiating unit 13, and for example, the length of each high-frequency radiating unit 13 may be a quarter of the wavelength corresponding to the center frequency of the high-frequency radiating unit 13, and in this case, the high-frequency radiating unit 13 has high radiation efficiency. The width of the high-frequency radiating element 13 is of an equal-width structure, that is, the width of the high-frequency radiating element 13 is constant in a direction from one end of the high-frequency radiating element 13 connected to the feeding element 11 (feeding point 111 or grounding point 112) to one end of the high-frequency radiating element 13 far from the feeding element 11.

One end of the low-frequency radiating element 12 is connected to the feeding element 11. Specifically, one end of one low frequency radiating element 12 is connected to the second side 1102 of the feeding point 111, and one end of the other low frequency radiating element 12 is connected to the second side 1102 of the grounding point 112. The length of the low frequency radiating element 12 is related to the center wavelength of the low frequency radiating element 12, and for example, the length of each low frequency radiating element 12 may be a quarter of the wavelength corresponding to the center frequency of the low frequency radiating element 12, in this case, the low frequency radiating element 12 has higher radiation efficiency.

In one example, the width of the low-frequency radiating element 12 is of an equal-width structure, that is, the width of the low-frequency radiating element 12 is not changed along a direction from one end of the low-frequency radiating element 12 connected to the feeding element 11 (the feeding point 111 or the grounding point 112) to one end of the low-frequency radiating element 12 far from the feeding element 11.

In another example, the low frequency radiating element 12 may include a multi-segment low frequency radiating structure, as shown in fig. 1, the low frequency radiating element 12 includes three segments of low frequency radiating structures, and the widths of the three segments of low frequency radiating structures are gradually widened along a direction from one end of the low frequency radiating element 12 connected to the feeding element 11 (the feeding point 111 or the grounding point 112) to one end of the low frequency radiating element 12 far from the feeding element 11. Of course, three segments are merely examples, and in other examples, the number of the low-frequency radiation structures may be two segments, four segments, five segments, six segments, and the like, which is not limited herein. Along the direction from one end of the low-frequency radiating element 12, which is connected with the feeding element 11 (feeding point 111 or grounding point 112), to one end of the low-frequency radiating element 12, which is far away from the feeding element 11, the widths of the multi-section low-frequency radiating structure become wider in sequence, so that the electrical length of the low-frequency radiating element 12 can be increased, the length of the low-frequency radiating element 12 can be shortened, and the miniaturization of the antenna assembly 100 is facilitated.

One end of the adjusting branch 14 is electrically connected with the feeding unit 11. Specifically, one end of one of the adjusting branches 14 is connected to the feeding point 111, and one end of the other adjusting branch 14 is connected to the grounding point 112. The adjusting stub 14 connected to the feed point 111 is disposed between the high-frequency radiating element 13 connected to the feed point 111 and the low-frequency radiating element 12 connected to the feed point 111. The adjustment branch 14 connected to the ground point 112 is provided between the high-frequency radiating element 13 connected to the ground point 112 and the low-frequency radiating element 12 connected to the ground point 112. Referring to fig. 8, the difference between the distance between the adjusting branch 14 and the high-frequency radiating unit 13 and a quarter of the wavelength corresponding to the center frequency of the high-frequency radiating unit 13 is smaller than the predetermined threshold. The predetermined threshold is a small value, and for example, the predetermined threshold may be any value between wavelengths corresponding to 0 to one eighth of the high-frequency radiating elements. Thus, the high-frequency radiation unit 13 has a strong radiation intensity in a direction away from the drone 1000, so that the energy reflected by the signal radiated by the high-frequency radiation unit 13 by the drone 1000 (shown in fig. 6) is reduced, and the high-frequency radiation unit 13 has a uniform radiation in a direction away from the drone 1000. The length of the adjusting stub 14 may be set to be between a quarter of the wavelength corresponding to the center frequency of the low frequency radiating element 12 and a quarter of the wavelength corresponding to the center frequency of the high frequency radiating element 13, where the length of the adjusting stub 14 is greater than the length of the high frequency radiating element 13. The tuning stubs 14 also generate resonance, and therefore, in order to reduce the interference of the tuning stubs 14 with the high-frequency radiating unit 13 and the low-frequency radiating unit 12, the length of the tuning stubs 14 may be set such that the difference of one quarter of the mean value of the wavelength corresponding to the center frequency of the high-frequency radiating unit 13 and the wavelength corresponding to the center frequency of the low-frequency radiating unit 12 is smaller than the first preset threshold. For example, assuming that the center frequency of the high-frequency radiating unit 13 is 5.4GHz, the center frequency of the low-frequency radiating unit 12 is 2.6GHz, a quarter of a mean value of a wavelength corresponding to the center frequency of the high-frequency radiating unit 13 and a wavelength corresponding to the center frequency of the low-frequency radiating unit 12 is a quarter of a wavelength corresponding to 4GHz, a difference between the length of the adjusting stub 14 and the quarter of the wavelength corresponding to 4GHz is smaller than a first preset threshold, and the first preset threshold is a smaller value, so that the length of the adjusting stub 14 is as close as possible to the quarter of the mean value of the wavelength corresponding to the center frequency of the high-frequency radiating unit 13 and the wavelength corresponding to the center frequency of the low-frequency radiating unit 12, for example, the first preset threshold may be any value between 0 and 0.1 GHz. When the length of the adjusting branch 14 is as close as possible to one quarter of the average value of the wavelength corresponding to the central frequency of the high-frequency radiating unit 13 and the wavelength corresponding to the central frequency of the low-frequency radiating unit 12, the resonance point of the adjusting branch 14 is as close as possible to the middle position between the resonance point of the low-frequency radiating unit 12 and the resonance point of the high-frequency radiating unit 13, so that the low-frequency radiating unit 12 and the high-frequency radiating unit 13 are not interfered excessively, and the balance of interference between the low-frequency radiating unit 12 and the high-frequency radiating unit 13 is maintained. As shown in fig. 7, when the length of the adjusting branch 14 is one-fourth of the average value of the wavelength corresponding to the center frequency of the high-frequency radiating unit 13 and the wavelength corresponding to the center frequency of the low-frequency radiating unit 12, that is, when the first preset threshold value is close to 0, the resonance point C of the adjusting branch 14 is located substantially at the middle position between the resonance point a of the low-frequency radiating unit 12 and the resonance point B of the high-frequency radiating unit 13, and does not interfere with the low-frequency radiating unit 12 excessively or interfere with the high-frequency radiating unit 13 excessively, so that the interference balance between the low-frequency radiating unit 12 and the high-frequency radiating unit 13 is maintained. Of course, in other embodiments, the length of the adjusting branch 14 may be smaller than the length of the high-frequency radiating unit 13.

The difference between the width of the adjusting branch 14 and the width of the high-frequency radiating unit 13 is smaller than a second preset threshold, and the second preset threshold is a smaller value, so that the width of the adjusting branch 14 is as close as possible to the width of the high-frequency radiating unit 13. When the second preset threshold is zero, the width of the adjusting branch 14 is equal to the width of the high-frequency radiating unit 13. As shown in fig. 1, the width of the adjusting branch 14 may be an equal width structure, that is, the width of the adjusting branch 14 is always kept constant along the direction from the end of the adjusting branch 14 connected to the feeding unit 11 (the feeding point 111 or the grounding point 112) to the end of the adjusting branch 14 far away from the feeding unit 11. When adjusting branch 14 and high frequency radiating element 13's width and being close, it is higher to adjust branch 14 and high frequency radiating element 13's impedance characteristic's uniformity, is favorable to strengthening the radiation intensity of high frequency radiating element 13 in the direction of keeping away from unmanned aerial vehicle 1000.

The difference between the distance between the adjusting branch 14 and the high-frequency radiating unit 13 and the distance between the adjusting branch 14 and the low-frequency radiating unit 12 is smaller than a preset distance, and the preset distance includes zero, at this time, the distance between the adjusting branch 14 and the high-frequency radiating unit 13 is equal to the distance between the adjusting branch 14 and the low-frequency radiating unit 12. As an example, the distance between the adjusting stub 14 and the high-frequency radiating unit 13 and the distance between the adjusting stub 14 and the low-frequency radiating unit 12 may be a quarter of a wavelength corresponding to the center frequency of the high-frequency radiating unit 13.

It should be noted that, when the low-frequency radiating element 12 includes a multi-segment low-frequency radiating structure, and the widths of the multi-segment low-frequency radiating structures are sequentially widened along a direction from one end of the low-frequency radiating element 12 connected to the feeding element 11 (the feeding point 111 or the grounding point 112) to one end of the low-frequency radiating element 12 far away from the feeding element 11, the distance between the branch 14 and the low-frequency radiating element 12 is adjusted as follows: the distance between the stub 14 and the low frequency radiating structure of minimum width is adjusted.

Referring to fig. 1 to 3, the dielectric body 15 may further include a first mounting element 153. The bracket 16 is used to support the feeder 115, and the bracket 16 includes a bracket body 161, a routing channel 163, a wire clamp 164, and a second mounting member 162.

The holder body 161 is provided on the second face 152 of the dielectric body 15. The feeder line 115 is carried on the holder body 161, and the feeder line 115 is spaced from the second face 152 at a carrying position of the holder body 161, in other words, the holder body 161 can support and elevate the feeder line 115. The support body 161 heightening the feeder line 115 can reduce the influence of the current of the feeder line 115 on the radiation performance of the high-frequency radiation unit 13, the low-frequency radiation unit 12, and the adjusting branch 14.

The wiring groove 163 is provided on the holder body 161. The feeding line 115 can be partially received in the routing groove 163, so that the routing direction of the feeding line 115 is defined by the routing groove 163, and the routing groove 163 can protect the feeding line 115. In one example, the extending direction of the routing groove 163 may be inclined with respect to the long axis direction of the dielectric body 15 (the direction indicated by the dotted line shown in fig. 2), and this design may avoid the problem that the feeder line 115 is bent at a large angle when the feeder line 115 extends from the foot stand 200 to the arm of the drone 1000 when the antenna assembly 100 is mounted on the foot stand 200 of the drone 1000 (shown in fig. 6).

The clips 164 are provided on the holder body 161, and the clips 164 serve to hold the feeder line 115 so that the feeder line 115 can be firmly fixed to the holder 16.

The second mounting member 162 is adapted to mate with the first mounting member 153, and the bracket 16 is mounted to the second face 152 of the dielectric body 15 when the first mounting member 153 is mated with the second mounting member 162. For example, as shown in fig. 1 and 3, the first mounting member 153 may be a positioning hole, and the second mounting member 162 may be a positioning post, and when the positioning hole and the positioning post are matched, the support 16 is mounted on the second surface 152 of the medium body 15. In other embodiments, the first mounting member 153 can also be a positioning post, and the second mounting member 162 can also be a positioning hole, and when the positioning post is matched with the positioning hole, the support 16 is mounted on the second surface 152 of the medium body 15. The first mounting member 153 and the second mounting member 162 can be disengaged by a relatively large insertion force, thereby detaching the bracket 16 from the medium body 15. In other embodiments, the bracket body 161 extends from the second face 152 of the dielectric member 15, in which case the bracket 16 and the dielectric member 15 are integrally formed, and the first mounting member 153 and the second mounting member 162 may be omitted.

In summary, the antenna assembly 100 of the present embodiment reduces the reflection of the signal radiated by the high-frequency radiation unit 13 by the drone 1000 (shown in fig. 6) by adding the adjusting branch 14, so that the high-frequency radiation unit 13 has stronger radiation intensity in a direction away from the drone 1000. As shown in fig. 8, the radiation intensity of the high-frequency radiation unit 13 in the direction away from the drone 1000 is enhanced.

In addition, the distance between the adjusting branch 14 and the high-frequency radiating unit 13 is closer to the distance between the adjusting branch 14 and the low-frequency radiating unit 12, so that the adjusting branch 14 has less influence on the directional diagram of the low-frequency radiating unit 12 while enhancing the radiation intensity of the high-frequency radiating unit 13 in the direction away from the unmanned aerial vehicle 1000. As shown in fig. 8 and 9, the radiation intensity of the high-frequency radiation unit 13 to which the adjustment branch 14 is added in the direction away from the drone 1000 is enhanced, and the difference between the pattern of the low-frequency radiation unit 12 when the adjustment branch 14 is added and the pattern of the low-frequency radiation unit 12 when the adjustment branch 14 is not added is small. Thus, the directional diagram of the high-frequency radiation unit can be adjusted, and meanwhile, the directional diagram of the low-frequency radiation unit is not influenced.

In some embodiments, the width of the adjustment branches 14 may also be gradual. For example, referring to fig. 4, the width of the adjusting branch 14 gradually widens from the end of the adjusting branch 14 connected with the feeding unit 11 to the end of the adjusting branch 14 far from the feeding unit 11. This design can increase the electrical length of the tuning stub 14, which is beneficial to shorten the physical length of the tuning stub 14, and further beneficial to miniaturizing the antenna assembly 100.

In some embodiments, the antenna assembly 100 is a dipole antenna, and the number of the high-frequency radiating elements 13, the low-frequency radiating elements 12 and the adjusting branches 14 is two. As shown in fig. 5, two high-frequency radiating elements 13 and two low-frequency radiating elements 12 are disposed on the first surface 151 of the dielectric body 15, two adjusting branches 14 are disposed on the second surface 152 of the dielectric body 15, and each adjusting branch 14 is disposed between the corresponding high-frequency radiating element 13 and low-frequency radiating element 12 (as viewed by projecting the adjusting branch 14 onto the first surface 151). At this time, one end of one of the adjusting branches 14 is electrically connected to the feeding point 111 through the first metal via 113, and one end of the other adjusting branch 14 is electrically connected to the grounding point 112 through the second metal via 114. The arrangement of the adjustment stub 14 on the second surface 152 can increase the distance between the adjustment stub 14 and the high-frequency radiating unit 13, so that the distance between the adjustment stub 14 and the high-frequency radiating unit 13 is closer to a quarter of the wavelength corresponding to the center frequency of the high-frequency radiating unit 13. In this way, the radiation intensity of the high-frequency radiation unit 13 in the direction away from the drone 1000 is enhanced. Since the wavelength corresponding to the center frequency of the low-frequency radiating element 12 is greater than the wavelength corresponding to the center frequency of the high-frequency radiating element 13, the adjusting stub 14 has a smaller influence on the directional diagram of the low-frequency radiating element 12.

In some embodiments, the antenna assembly 100 is a dipole antenna, the number of the high-frequency radiating elements 13 and the number of the low-frequency radiating elements 12 are two, and the number of the adjusting branches 14 may be four. Wherein, two high frequency radiating elements 13 and two low frequency radiating elements 12 are all disposed on the first surface 151 of the dielectric body 15, two adjusting branches 14 are disposed on the first surface 151 of the dielectric body 15, and the remaining two adjusting branches 14 are disposed on the second surface 152 of the dielectric body 15. At this time, in the two adjusting branches 14 disposed on the first surface 151 of the dielectric body 15, one end of one adjusting branch 14 is directly electrically connected to the feeding point 111, and one end of the other adjusting branch 14 is directly electrically connected to the grounding point 112; one end of one of the two adjusting branches 14 disposed on the second surface 152 of the dielectric body 15 is electrically connected to the feeding point 111 through the first metal through hole 113, and one end of the other adjusting branch 14 is electrically connected to the feeding point 111 through the second metal through hole 114; and each of the adjusting branches 14 is disposed between the corresponding high-frequency radiating unit 13 and the corresponding low-frequency radiating unit 12 (as viewed by projecting the four adjusting branches 14 onto the first surface 151). This design also increases the distance between the adjusting stub 14 and the high-frequency radiating unit 13, so that the distance between the adjusting stub 14 and the high-frequency radiating unit 13 is closer to a quarter of the wavelength corresponding to the center frequency of the high-frequency radiating unit 13.

In some embodiments, the antenna assembly 100 may also be a monopole antenna.

When the distance between the high-frequency radiating unit 13 and the adjusting branch 14 is close to a quarter of the wavelength corresponding to the center frequency of the high-frequency radiating unit 13, and the length of the adjusting branch 14 is greater than that of the high-frequency radiating unit 13, the adjusting branch 14 generates a reflection effect on the high-frequency radiating unit 13, so that the directional diagram of the high-frequency radiating unit 13 is shifted in one direction. The distance between the high-frequency radiation unit 13 and the adjusting branch 14 is close to one quarter of the wavelength corresponding to the center frequency of the high-frequency radiation unit 13, and the length of the adjusting branch 14 is smaller than that of the high-frequency radiation unit 13, the adjusting branch 14 has a guiding effect on the high-frequency radiation unit 13, so that the directional diagram of the high-frequency radiation unit 13 deviates to another direction, which can be understood, the installation of the antenna can achieve the effect of deviating to the direction far away from the unmanned aerial vehicle 1000, so that the high-frequency radiation unit 13 has stronger radiation intensity in the direction far away from the unmanned aerial vehicle 1000, the energy of signal reflection radiated by the unmanned aerial vehicle 1000 to the high-frequency radiation unit 13 is reduced, and the high-frequency radiation unit 13 has more uniform radiation in the direction far away from the unmanned aerial vehicle 1000.

Referring to fig. 6, the present application further provides an unmanned aerial vehicle 1000. The drone 1000 includes a body 300, a foot rest 200, and the antenna assembly 100 of any of the above embodiments. The stand 200 is mounted on the body 300, and the antenna assembly 100 is mounted on the stand 200.

The utility model provides an unmanned aerial vehicle 1000 makes high frequency radiating element 13 have stronger radiation intensity in the direction of keeping away from unmanned aerial vehicle 1000 through adding regulation minor matters 14 in antenna module 100 to reduce the energy of unmanned aerial vehicle 1000 to the signal reflection of high frequency radiating element 13 radiation, make high frequency radiating element 13 have comparatively even radiation in the direction of keeping away from unmanned aerial vehicle 1000.

In the description herein, reference to the description of the terms "certain embodiments," "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" 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 application. 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.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present application, "a plurality" means at least two, e.g., two, three, unless specifically limited otherwise.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations of the above embodiments may be made by those of ordinary skill in the art within the scope of the present application, which is defined by the claims and their equivalents.

Claims

1. An antenna assembly, characterized in that the antenna assembly comprises:

a power feeding unit;

the high-frequency radiating unit, one end of the said high-frequency radiating unit connects the said feed unit;

one end of the low-frequency radiating unit is connected with the feed unit; and

and one end of the adjusting branch is connected with the feed unit, and the difference value between the distance between the adjusting branch and the high-frequency radiation unit and one quarter of the wavelength corresponding to the central frequency of the high-frequency radiation unit is smaller than a preset threshold value.

2. The antenna assembly of claim 1, wherein the feed element comprises a first side and a second side opposite the first side, wherein one end of the high frequency radiating element is connected to the first side of the feed element, wherein one end of the low frequency radiating element is connected to the second side of the feed element, and wherein the tuning stub is disposed between the high frequency radiating element and the low frequency radiating element.

3. The antenna assembly according to claim 2, characterized in that the difference between the length of the tuning branches and a quarter of the mean value of the wavelengths corresponding to the central frequency of the high-frequency radiating element and the wavelengths corresponding to the central frequency of the low-frequency radiating element is less than a first preset threshold.

4. The antenna assembly of claim 2, wherein the difference between the width of the tuning stub and the width of the high frequency radiating element is less than a second predetermined threshold.

5. The antenna assembly of claim 4, wherein the low-frequency radiating element comprises a multi-segment low-frequency radiating structure, and the width of the multi-segment low-frequency radiating structure is gradually widened along a direction from one end of the low-frequency radiating element connected with the feed element to one end of the low-frequency radiating element far away from the feed element;

and the width of the adjusting branch knot is gradually widened along the direction from one end of the adjusting branch knot connected with the feed unit to one end of the adjusting branch knot far away from the feed unit.

6. The antenna assembly of claim 2, wherein a distance between the tuning stub and the high frequency radiating element is equal to a distance between the tuning stub and the low frequency radiating element.

7. The antenna assembly of claim 2, wherein the antenna assembly comprises a dipole antenna, the number of the high frequency radiating elements, the number of the low frequency radiating elements, and the number of the tuning branches are two, and the feeding element comprises a feeding point and a grounding point;

one end of one of the high-frequency radiating units is connected with the feed point, and one end of the other high-frequency radiating unit is connected with the grounding point;

one end of one of the low-frequency radiating units is connected with the feed point, and one end of the other low-frequency radiating unit is connected with the grounding point;

one end of one of the adjusting branches is connected with the feed point, and one end of the other adjusting branch is connected with the grounding point;

the adjusting branch connected with the feed-in point is arranged between the high-frequency radiation unit connected with the feed-in point and the low-frequency radiation unit connected with the feed-in point;

the adjusting branch connected with the grounding point is arranged between the high-frequency radiation unit connected with the grounding point and the low-frequency radiation unit connected with the grounding point.

8. The antenna assembly of claim 7, further comprising a dielectric body, wherein the high frequency radiating element, the low frequency radiating element, and the tuning stub are disposed on the dielectric body.

9. The antenna assembly of claim 8, wherein the dielectric body includes a first face and a second face opposite the first face; wherein:

the high-frequency radiation unit, the low-frequency radiation unit and the adjusting branch are all arranged on the first surface; or

The high-frequency radiation unit and the low-frequency radiation unit are arranged on the first surface, and the adjusting branches are arranged on the second surface.

10. The antenna assembly of claim 9, wherein the feed unit further comprises:

the first metal through hole and the second metal through hole are arranged in the dielectric body, the first metal through hole corresponds to the feed-in point, the second metal through hole corresponds to the grounding point, and the number of the first metal through hole and the second metal through hole is one or more;

and the inner core of the feeder line is electrically connected with the first metal through hole, and the shielding layer of the feeder line is electrically connected with the second metal through hole.

11. The antenna assembly as claimed in claim 10, wherein when the tuning branches are disposed at the first surface, one end of one of the tuning branches is directly electrically connected to the feeding point, and one end of the other tuning branch is directly electrically connected to the ground point;

when the adjusting branches are arranged on the second surface, one end of one adjusting branch is electrically connected with the feed point through the first metal through hole, and one end of the other adjusting branch is electrically connected with the grounding point through the second metal through hole.

12. The antenna assembly of claim 10, further comprising a bracket for supporting the feed line, the bracket comprising:

a bracket body disposed on the second face;

the wiring groove is arranged on the bracket body, and the feeder line part is accommodated in the wiring groove;

the wire clamp is arranged on the support body and used for clamping the feeder line so as to fix the feeder line on the support.

13. The antenna assembly of claim 12, wherein the extending direction of the wiring groove is inclined with respect to the long axis direction of the dielectric body.

14. An antenna assembly according to claim 12, wherein a first mounting element is provided on the dielectric body and a second mounting element is provided on the bracket body, the bracket being mounted on the second face of the dielectric body when the first and second mounting elements are mated.

15. The antenna assembly according to claim 1, wherein the predetermined threshold is any value between wavelengths corresponding to a center frequency of the high-frequency radiating element of 0 to one eighth.

16. A drone, characterized in that it comprises:

a foot rest; and

the antenna assembly of any one of claims 1-15, the antenna assembly mounted on the foot stand.