CN211655048U

CN211655048U - Antenna assembly and wireless communication device

Info

Publication number: CN211655048U
Application number: CN202020667496.9U
Authority: CN
Inventors: 房牧; 吕超; 何乾坤
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd; SZ DJI Innovations Technology Co Ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2020-10-09
Anticipated expiration: 2030-04-27

Abstract

The utility model discloses an antenna module and wireless communication equipment. The antenna assembly includes an antenna and a fixing structure for fixing the antenna. The electromagnetic energy density of the performance sensitive area of the antenna is greater than a preset threshold. The fixed structure comprises a shell and a grid supporting structure, and the grid supporting structure is arranged on the inner surface of the shell. The grid supporting structure comprises a plurality of rib positions, the position of each rib position avoids the performance sensitive area, and the antenna is fixed on the supporting surface of each rib position. The utility model discloses among the embodiment's the antenna module, on the one hand, net bearing structure's muscle position can support the antenna fixedly, and on the other hand, the performance sensitive area of antenna can be avoided to the position of muscle position to alleviate the influence of interval fluctuation and the casing dielectric constant fluctuation between antenna and the casing to the antenna performance, improve the stability of performance of antenna.

Description

Antenna assembly and wireless communication device

Technical Field

The utility model relates to an antenna technology field, in particular to antenna module and wireless communication equipment.

Background

An antenna comprising a dielectric substrate is typically mounted on a housing of plastic material of a particular shape and thickness. The dielectric constant fluctuation of the plastic material and the change of the distance between the antenna and the shell can change the 'equivalent dielectric constant' of the actual antenna, thereby changing the performance of the antenna. In the related art, the antenna is fixed to the housing by means of a heat-fusible pillar. However, since the dielectric substrate and the plastic housing of the antenna are made of hard materials and the fixing of the heat-melting column is generally unstable, it is difficult to completely fix the relative position between the antenna and the plastic housing in this way, and the performance of the antenna is easily fluctuated due to slight shaking in a close distance range (antenna performance sensitive area). Furthermore, the variation of the dielectric constant of the plastic material will also cause the performance difference of the antenna.

SUMMERY OF THE UTILITY MODEL

The utility model discloses embodiment provides an antenna module and wireless communication equipment.

The utility model discloses embodiment's antenna module includes:

the electromagnetic energy density of a performance sensitive area of the antenna is larger than a preset threshold value; and

the antenna fixing structure comprises a shell and a grid supporting structure, wherein the grid supporting structure is arranged on the inner surface of the shell and comprises a plurality of rib positions, the positions of the rib positions are avoided from a performance sensitive area, and the antenna is fixed on a supporting surface of the rib positions.

In the antenna module of above-mentioned embodiment, on the one hand, the muscle position of net bearing structure can support fixedly to the antenna, and on the other hand, the performance sensitive area of antenna can be avoided to the position of muscle position to alleviate the influence of the interval fluctuation between antenna and the casing dielectric constant fluctuation to the antenna performance, improve the performance stability of antenna.

In some embodiments, the antenna is provided with a positioning hole, and the fixing structure includes a fixing column disposed on an inner surface of the housing, the fixing column penetrating through the positioning hole to fix the antenna on the supporting surface of the rib.

In some embodiments, the housing, the lattice support structure and the fixation posts are an integrally formed structure.

In some embodiments, the height of the grid support structure is related to the frequency of the antenna.

In some embodiments, the housing includes a first housing and a second housing that are detachably connected to form a space to accommodate the antenna.

In some embodiments, the antenna includes a radiator and a reflector, the grid support structure includes a first grid support structure and a second grid support structure, the first grid support structure is disposed on the inner surface of the first housing, the second grid support structure is disposed on the inner surface of the second housing, the radiator is fixed to the support surface of the rib of the first grid support structure, and the reflector is fixed to the support surface of the rib of the second grid support structure.

In some embodiments, the radiator includes an antenna substrate including first and second opposing surfaces, and a radiating element disposed on the first surface of the antenna substrate, the reflector being on the second surface side of the antenna substrate.

In some embodiments, the radiating element includes a first radiating branch and a second radiating branch, one of the first radiating branch and the second radiating branch is connected to a feeding point, the other of the first radiating branch and the second radiating branch is connected to a grounding point, an end portion of the first radiating branch is bent in a direction of the second radiating branch, and an end portion of the second radiating branch extends in a direction away from the first radiating branch.

In some embodiments, the radiating element is a high-frequency radiating element, the antenna further includes a low-frequency radiating element, the low-frequency radiating element includes a third radiating branch and a fourth radiating branch, one of the third radiating branch and the fourth radiating branch is connected to the feeding point, the other of the third radiating branch and the fourth radiating branch is connected to the grounding point, the third radiating branch and the fourth radiating branch are symmetrically disposed, the third radiating branch includes a first vertical branch and two second vertical branches, the two second vertical branches are respectively connected to two opposite sides of one end of the first vertical branch through a first transverse branch, and a length of the first vertical branch is greater than a length of the second vertical branch.

In some embodiments, the reflector includes a reflective substrate, and a low-frequency reflective branch and a high-frequency reflective branch both disposed on the same surface of the reflective substrate, where the low-frequency reflective branch is configured to reflect low-frequency electromagnetic waves radiated by the low-frequency radiation unit, and the high-frequency reflective branch is configured to reflect high-frequency electromagnetic waves radiated by the high-frequency radiation unit.

In some embodiments, the low-frequency reflection branch includes a third vertical branch and two second horizontal branches, and the two second horizontal branches are respectively connected to two ends of the third vertical branch and both extend in a direction in which the high-frequency reflection branch is located.

In some embodiments, the number of the high-frequency reflecting branches is two, and each of the high-frequency reflecting branches is linear.

The utility model discloses embodiment's wireless communication equipment includes organism and above-mentioned arbitrary embodiment the antenna module, the antenna module is located the organism.

In the wireless communication device of the above embodiment, on the one hand, the rib positions of the grid support structure can support and fix the antenna, and on the other hand, the positions of the rib positions can avoid the performance sensitive area of the antenna, so that the influence of the space fluctuation between the antenna and the shell and the dielectric constant fluctuation of the shell on the performance of the antenna is relieved, and the performance stability of the antenna is improved.

In some embodiments, the wireless communication device includes a remote control for controlling the mobile platform.

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 structural diagram of an antenna assembly of an embodiment of the present invention;

fig. 2 is another schematic structural view of an antenna assembly of an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an antenna according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a wireless communication device according to an embodiment of the present invention;

fig. 5 is another schematic structural diagram of a wireless communication device according to an embodiment of the present invention;

fig. 6 is a schematic partial structure diagram of a wireless communication device according to an embodiment of the present invention.

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, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. 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, 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.

Referring to fig. 1, an antenna assembly 100 according to an embodiment of the present invention includes an antenna 10 and a fixing structure 20 for fixing the antenna 10. The electromagnetic energy density of the performance sensitive area of the antenna 10 is greater than a predetermined threshold. The fixed structure 20 includes a housing 22 and a lattice support structure 24, the lattice support structure 24 being provided on an inner surface of the housing 22. The grid supporting structure 24 comprises a plurality of rib positions 240, the positions of the rib positions 240 avoid the performance sensitive area, and the antenna 10 is fixed on the supporting surface of the rib positions 240.

The utility model discloses in antenna module 100 of embodiment, on the one hand, rib position 240 of net bearing structure 24 can support antenna 10 fixedly, and on the other hand, the performance sensitive area of antenna 10 can be avoided to the position of rib position 240 to alleviate the influence of the interval fluctuation between antenna 10 and the casing 22 and the fluctuation of casing 22 dielectric constant to antenna 10 performance, improve antenna 10's performance stability.

It will be appreciated that the housing 22, the grid support structure 24 may be formed of a plastic material or other material. Preferably, the housing 22 and the grid support structure 24 are both plastic materials for cost savings. The antenna 10 includes a dielectric substrate and a radiating element and feed structure 126 located on the dielectric substrate. The dielectric substrate may be a PCB substrate. The electromagnetic energy density around the radiating element and feed structure 126 is relatively large, typically greater than a predetermined threshold, which may be specifically set based on antenna performance. When the antenna 10 is fixed on the housing 22 made of plastic material with a specific shape and thickness, the fluctuation of the dielectric constant of the plastic material itself and the change of the distance between the antenna 10 and the housing 22 will change the equivalent dielectric constant of the actual antenna 10, thereby changing the performance of the antenna 10.

The utility model discloses an add net bearing structure 24 at casing 22's internal surface and support fixed antenna 10, pull open the whole distance between antenna 10 and the casing 22 internal surface, both can avoid the interval fluctuation between antenna 10 and the casing 22 to exert an influence to antenna 10 performance, also can avoid casing 22's dielectric constant fluctuation to exert an influence to antenna 10's performance. The position of rib 240 avoids the performance sensitive area of antenna 10 and does not affect the performance of antenna 10.

As such, the antenna assembly 100 of the present invention, through the design of the grid support structure 24 and the rib positions 240, reduces the plastic material distribution in the performance sensitive area of the antenna 10 as much as possible. Compare in the fixed mode of direct hot melt post that adopts, to the undulant magnitude of same clearance size or the undulant magnitude of plastic material dielectric constant, the utility model discloses owing to do not take place in antenna 10's performance sensitive area, can show the reduction to antenna 10's equivalent dielectric constant's influence to antenna 10 can obtain stable performance. That is, when the antenna 10 is fixed on the supporting surface of the rib 240, the influence of slight shake on the performance of the antenna 10 can be effectively controlled and within an acceptable range, so the antenna assembly 100 of the present invention does not need to provide a higher requirement for the fixed tight and stable degree.

In some embodiments, the antenna 10 is provided with a positioning hole 102, the fixing structure 20 includes a fixing post 26, the fixing post 26 is provided on the inner surface of the housing 22, and the fixing post 26 penetrates through the positioning hole 102 to fix the antenna 10 on the supporting surface of the rib 240.

In this way, the antenna 10 is fixed to the support surface of the rib 240 in a simple manner. It is understood that the locating holes 102 open to the dielectric substrate. When the antenna 10 is mounted, the fixing posts 26 pass through the positioning holes 102 of the dielectric substrate, so that the dielectric substrate contacts the supporting surface of the rib 240, and the antenna 10 is fixed on the supporting surface of the rib 240. The fixing posts 26 may be heat-fusible posts or screw posts, etc. Preferably, the fixing posts 26 are heat-fusible posts.

The number of the positioning holes 102 is consistent with that of the fixing posts 26, and the positioning holes correspond to the fixing posts 26 one by one. In order to ensure the stability of the installation, the number of the positioning holes 102 and the fixing posts 26 is at least two. In the example of fig. 1, the number of the positioning holes 102 and the fixing posts 26 is two, and in other embodiments, the number of the positioning holes 102 and the fixing posts 26 may be three, four, or the like.

In certain embodiments, the housing 22, the lattice support structure 24 and the fixation posts 26 are an integrally formed structure.

In this manner, the connection between the housing 22, the lattice support structure 24 and the fixing posts 26 is stabilized. In one embodiment, the housing 22 and the grid support structure 24 are made of plastic material, the fixing posts 26 are heat-fusible posts, and the fixedly connected housing 22, the grid support structure 24 and the fixing posts 26 can be formed by integral injection molding.

In some embodiments, the height of the grid support structure 24 is related to the frequency of the antenna 10.

It will be appreciated that the height of the grid support structure 24 determines the spacing between the antenna 10 and the housing 22. The antenna 10 will have a different frequency and the spacing required to be pulled apart between the antenna 10 and the housing 22 will be different. In one embodiment, the antenna 10 has a frequency of 2.4GHz, and the height of the grid support structure 24 may be 0.5mm or greater than 0.5mm, i.e., the distance that needs to be pulled apart between the antenna 10 and the inner surface of the housing 22 is about 0.5mm, or greater.

Referring to fig. 2, in some embodiments, the housing 22 includes a first housing 222 and a second housing 224. The first case 222 and the second case 224 are detachably coupled to form a space for accommodating the antenna 10.

In this manner, placement of the antenna 10 within the housing 22 is facilitated to protect the antenna 10, thereby extending the life of the antenna 10. And when the antenna 10 is in failure, the antenna 10 can be conveniently taken out for maintenance or replacement.

In some embodiments, the antenna 10 includes a radiator 12 and a reflector 14. The lattice support structure 24 includes a first lattice support structure 242 and a second lattice support structure 244, the first lattice support structure 242 being disposed on the inner surface of the first housing 222 and the second lattice support structure 244 being disposed on the inner surface of the second housing 224. The radiator 12 is fixed to the support surface of the rib 240 of the first mesh support structure 242 and the reflector 14 is fixed to the support surface of the rib 240 of the second mesh support structure 244.

Specifically, referring to fig. 3, the radiator 12 includes an antenna substrate 122 and a radiation unit 124. The antenna substrate 122 includes a first surface 1222 and a second surface 1224 opposite to each other, the radiating element 124 is disposed on the first surface 1222 of the antenna substrate 122, and the reflector 14 is disposed on the second surface 1224 side of the antenna substrate 122.

It can be understood that the radiation unit 124 is used for radiating electromagnetic waves, and the reflector 14 is used for reflecting the electromagnetic waves radiated by the radiation unit 124 to realize the directional radiation performance of the radiator 12, and at the same time, the reflection deterioration influence of the metal material object behind the radiator 12 on the performance of the antenna 10 can be reduced. The radiator 12 is fixed on the supporting surface of the rib 240 of the first grid supporting structure 242, and the reflector 14 is fixed on the supporting surface of the rib 240 of the second grid supporting structure 244, so that the reflector 14 and the radiator 12 can keep a proper distance to ensure the performance of the antenna 10.

In one embodiment, the reflector 14 can be located directly behind the radiator 12, with the forward directional radiation performance of the radiator 12 being achieved by reflecting the rearward radiation of the radiation element 124. The forward and backward directions are opposite directions for illustration.

The dielectric substrate includes an antenna substrate 122 and a reflective substrate 142. In other embodiments, the antenna 10 may omit the reflector 14.

In some embodiments, the radiating element 124 includes a first radiating branch 1242 and a second radiating branch 1244, one of the first radiating branch 1242 and the second radiating branch 1244 is connected to the feeding point 104, the other of the first radiating branch 1242 and the second radiating branch 1244 is connected to the ground point 106, a distal end 12422 of the first radiating branch 1242 is partially bent in a direction of the second radiating branch 1244, and a distal end 12442 of the second radiating branch 1244 extends in a direction away from the first radiating branch 1242.

It can be understood that the end 12422 of the first radiation branch 1242 is bent toward the second radiation branch 1244, and the end 12442 of the second radiation branch 1244 extends toward a direction away from the first radiation branch 1242, that is, the first radiation branch 1242 and the second radiation branch 1244 are asymmetrically arranged, so that the current path distribution and the equivalent phase center of the radiator 12 can be adjusted, the beam direction of the radiator 12 is shifted toward the direction of the second radiation branch 1244, and the beam direction of the antenna 10 can be adjusted to a desired direction.

The antenna 10 of the present invention can be used in a wireless communication device. For example, a remote control for a drone. Among the prior art, to the antenna design of unmanned aerial vehicle's remote controller, the maximum radiation direction of antenna can set up the direction at remote controller organism plane place. However, when some users hold the remote controller, the body often has a certain tilt angle, and the maximum radiation direction of the antenna tilts along with the tilt angle, so that the gain in the horizontal direction is attenuated to a certain extent, and the larger the tilt angle of the remote controller is, the larger the gain attenuation in the horizontal direction is.

Therefore, for the first radiation branch 1242 and the second radiation branch 1244 that are symmetrically arranged, the embodiment of the present invention provides an antenna 10, in which the first radiation branch 1242 and the second radiation branch 1244 of the radiator 12 are asymmetrically arranged, and the end 12422 of the first radiation branch 1242 is partially bent toward the second radiation branch 1244, so that the overall height of the current path distribution of the radiator 12 is shifted toward the second radiation branch 1244, and the equivalent phase center of the whole radiation unit 124 is also shifted toward the second radiation branch 1244. In this way, the beam direction of the antenna 10 can be adjusted to a desired direction, and the wireless communication device equipped with the antenna 10 can satisfy signal coverage in the desired direction.

In the embodiment shown in fig. 3, the first radiation branch 1242 and the second radiation branch 1244 are respectively located at two sides of the transverse symmetry axis P of the antenna substrate 122, the first radiation branch 1242 is located above the second radiation branch 1244, a portion of the end 12422 of the first radiation branch 1242 is bent downward, and the first radiation branch 1242 is bent in an L shape as a whole. Therefore, the overall height of the current path distribution of the antenna 10 is lowered, and the equivalent phase center of the entire radiation unit 124 is lowered to some extent.

It should be noted that one of the first radiation branch 1242 and the second radiation branch 1244 is connected to the feeding point 104, and the other of the first radiation branch 1242 and the second radiation branch 1244 is connected to the grounding point 106, where the first radiation branch 1242 is connected to the feeding point 104, and the second radiation branch 1244 is connected to the grounding point 106; the first radiating branch 1242 may be connected to the ground point 106, and the second radiating branch 1244 may be connected to the feeding point 104, which is not limited herein. Referring to fig. 1, the antenna 10 further includes a feeding structure 126, and the feeding structure 126 includes a feeding branch 1262 and a grounding branch 1264. One of the first radiation branch 1242 and the second radiation branch 1244 is connected to the feeding branch 1262, and its connection point forms a feeding point 104; the other of first radiating branch 1242 and second radiating branch 1244 is connected to ground branch 1264, the connection point of which forms ground point 106.

In some embodiments, the radiating element 124 is a high frequency radiating element 1240 and the antenna 10 further includes a low frequency radiating element 1241. The low-frequency radiating element 1241 includes a third radiating branch 1243 and a fourth radiating branch 1245. One of the third radiation branch 1243 and the fourth radiation branch 1245 is connected to the feeding point 104, and the other of the third radiation branch 1243 and the fourth radiation branch 1245 is connected to the ground point 106. The third radiation branch 1243 and the fourth radiation branch 1245 are symmetrically arranged. Third radiating branch 1243 includes a first vertical branch 12412 and two second vertical branches 12414. The two second vertical branches 12414 are respectively connected to two opposite sides of one end of the first vertical branch 12412 through the first horizontal branch 12416, and the length of the first vertical branch 12412 is greater than that of the second vertical branch 12414.

It is understood that the high frequency radiation unit 1240 and the low frequency radiation unit 1241 constitute the dual frequency antenna 10. For dual-band antenna 10, its size is mainly determined by the radiation branch size of low-frequency radiating element 1241. The longitudinal (i.e., the vertical direction shown in fig. 3) dimension of the middle-low frequency radiating unit 1241 of the present invention is less than or equal to one fourth of the wavelength of the low-frequency electromagnetic wave. Specifically, two second vertical branches 12414 are located at the end 12411 of the low-frequency radiating unit 1241, the first vertical branch 12412 is located between the two second vertical branches 12414, and the first vertical branch 12412 and the two second vertical branches 12414 form a chevron structure. Thus, the current path can be effectively increased within a smaller longitudinal (vertical) dimension range, thereby realizing the resonance of the low-frequency antenna 10, and simultaneously, the miniaturization reduces the current integral path length along the electric field direction in the antenna 10 structure, and also expands the E-plane beam width of the antenna 10.

In the illustrated embodiment, the number of the high-frequency radiation units 1240 is two. The two high-frequency radiating elements 1240 are symmetrically arranged with respect to the length direction of the first vertical branch 12412, and the two high-frequency radiating elements 1240 are located between the two ends 12411 of the low-frequency radiating element 1241. In this manner, the high-frequency radiation and reception performance of the antenna 10 can be enhanced. In other embodiments, the number of the high-frequency radiation units 1240 may be one, and the high-frequency radiation units 1240 are disposed at one end of the first vertical branch 12412 and between two ends 12411 of the low-frequency radiation units 1241.

It should be noted that one of the third radiation branch 1243 and the fourth radiation branch 1245 is connected to the feeding point 104, and the other of the third radiation branch 1243 and the fourth radiation branch 1245 is connected to the grounding point 106, where the third radiation branch 1243 is connected to the feeding point 104, and the fourth radiation branch 1245 is connected to the grounding point 106; the third radiation branch 1243 may be connected to the ground point 106, and the fourth radiation branch 1245 may be connected to the feeding point 104, which is not limited herein. One of the third radiation branch 1243 and the fourth radiation branch 1245 is connected to the feeding branch 1262, and its connection point forms a feeding point 104; the other of the third radiation branch 1243 and the fourth radiation branch 1245 is connected to a ground branch 1264, the connection point of which forms the ground point 106.

In some embodiments, the reflector 14 includes a reflective substrate 142, and a low-frequency reflective branch 144 and a high-frequency reflective branch 146 disposed on the same surface of the reflective substrate 142, wherein the low-frequency reflective branch 144 is used for reflecting low-frequency electromagnetic waves radiated by the low-frequency radiating unit 1241, and the high-frequency reflective branch 146 is used for reflecting high-frequency electromagnetic waves radiated by the high-frequency radiating unit 1240.

Specifically, the number of the high-frequency reflection branches 146 is two, and each high-frequency reflection branch 146 is linear. Compared with a single high-frequency reflection branch 146, the double high-frequency reflection branches 146 can achieve a stronger directional radiation effect and a higher frequency band gain. The low-frequency reflection branch 144 includes a third vertical branch 1442 and two second horizontal branches 1444, and the two second horizontal branches 1444 are respectively connected to two ends of the third vertical branch 1442 and both extend toward the direction of the high-frequency reflection branch 146. A third vertical branch 1442 and two second horizontal branches 1444, forming a structure similar to a C-shape. In this manner, low frequency reflective stub 144 may achieve a longer current path within a smaller longitudinal (vertical) dimension by bending, thereby enabling a sufficient length to achieve a reflective effect on low frequency electromagnetic waves.

Further, the high-frequency reflection branch 146 is located in a space surrounded by the two second horizontal branches 1444 and the third vertical branch 1442. It will be appreciated that the design of the low frequency reflective stub 144 leaves room for the placement of the high frequency reflective stub 146 on the reflective substrate 142, which allows the size of the reflector 14 to be reduced. The high frequency reflection branch 146 and the low frequency reflection branch 144 can work independently without interference.

In some embodiments, the geometric center of the high-frequency reflecting branch 146 is located on a side of the geometric center of the reflective substrate 142 that is offset to the direction of the first radiating branch 1242.

Thus, the equivalent phase center of the high-frequency reflection branch 146 is shifted to one side of the direction of the first radiation branch 1242. In the embodiment shown in fig. 3, the radiating element 124 is a high-frequency radiating element 1240, the first radiating branch 1242 and the second radiating branch 1244 are respectively located at two sides of the transverse symmetry axis P of the antenna substrate 122, the first radiating branch 1242 is located above the second radiating branch 1244, and the equivalent phase center of the high-frequency radiating element 1240 sinks to a certain extent. The geometric center of the high-frequency reflection branch 146 is located on one side of the geometric center of the reflection substrate 142 that is biased toward the direction of the first radiation branch 1242, and then the high-frequency reflection branch 146 moves upward by a certain distance as a whole compared with the geometric center of the reflection substrate 142, so that the equivalent phase center of the high-frequency reflection branch 146 is raised to a certain extent.

It can be understood that the radiator 12 and the reflector 14 constitute a binary antenna 10 array, and the direction in which the phase center of the reflector 14 points to the phase center of the radiator 12 is the array axis direction of the binary antenna 10 array, and also determines the beam direction of the antenna 10. The phase center of the high-frequency radiation unit 1240 sinks and the phase center of the high-frequency reflection branch 146 rises, so that a connecting line between the phase centers presents a depression angle as large as possible, which is equivalent to that the array axis direction of the equivalent binary antenna 10 array generates a depression angle, thereby realizing the obvious downward inclination of the beam direction. For wireless communication devices such as remote controllers that control mobile platforms, a downward beam direction is advantageous for users to control the mobile platforms.

Specifically, in the design of the remote controller, the plane of the remote controller body is used as a reference frame, and the maximum radiation direction of the antenna 10 is set to point to the right front horizontal plane direction, so as to obtain the maximum communication distance. Considering that when some users hold the remote controller, the body may have a certain tilt angle (generally, the remote controller is not pressed down according to the holding habit), the maximum radiation direction of the antenna 10 tilts up, so that the gain in the horizontal direction is attenuated to a certain extent (the larger the angle is, the larger the attenuation degree is). The utility model discloses a radiator 12 adds the directional dead ahead of level of low frequency wave beam (the biggest radiation direction) that reflector 14's cooperation design made dual-frenquency directional antenna, and high frequency wave beam (the biggest radiation direction) compare in the low frequency 20 ~ 30 of having a down dip, realize pitching the equivalent wave beam of face and widen to compensate the performance loss that this kind of condition brought.

In some embodiments, the low frequency beam direction of antenna 10 is offset toward the opening of low frequency reflective stub 144.

It can be understood that, for the radiator 12, the third radiation branch 1243 and the fourth radiation branch 1245 of the low-frequency radiation element 1241 are symmetrical up and down with respect to the geometric center of the antenna substrate 122 and are symmetrical left and right, so that the equivalent phase center thereof is located at the geometric center of the antenna substrate 122. The reflector 14 is different from the reflector 14 in that the low-frequency reflection branch 144 is vertically symmetrical and horizontally asymmetrical only with reference to the center of the reflection substrate 14222, the main reflection region of the low-frequency reflection branch 144 is located at the first vertical branch 12412, and the equivalent phase center thereof is located at the midpoint of the first vertical branch 12412. From the low-frequency reflection branch 144 of the reflector 14 to the radiator 12, the phase center connection line direction is deviated toward the opening direction of the low-frequency reflection branch 144, so that the low-frequency beam direction is also deviated toward the opening direction of the low-frequency reflection branch 144.

It should be noted that, in the present invention, the first radiation branch 1242 and the second radiation branch 1244 are a pair of radiation branches, and the third radiation branch 1243 and the fourth radiation branch 1245 are a pair of radiation branches.

Referring to fig. 4, a wireless communication device 1000 according to an embodiment of the present invention includes a body 200 and an antenna assembly 100 according to any of the above embodiments, wherein the antenna assembly 100 is disposed on the body 200.

In the wireless communication device 1000 of the above embodiment, on the one hand, the rib 240 of the grid support structure 24 can support and fix the antenna 10, and on the other hand, the position of the rib 240 can avoid the performance sensitive area of the antenna 10, so as to alleviate the influence of the fluctuation of the distance between the antenna 10 and the housing 22 and the fluctuation of the dielectric constant of the housing 22 on the performance of the antenna 10, and improve the performance stability of the antenna 10.

It is understood that the wireless communication device 1000 includes a remote controller, a router, an intercom, an unmanned aerial vehicle, and the like. The wireless communication apparatus 1000 is explained below by taking a remote controller as an example. The remote control may be used to control the mobile platform. The mobile platform can be an unmanned aerial vehicle, an unmanned trolley, a mobile robot and the like.

Referring to fig. 4 and 5, in some embodiments, a wireless communication device 1000 includes a pull structure 300. The drawing structure 300 is movably connected to the housing 200, and the antenna assembly 100 is disposed on the drawing structure 300. When the pull structure 300 moves relative to the housing 200, the antenna assembly 100 can move closer to or away from the housing 200 following the pull structure 300.

Specifically, the drawing structure 300 is slidably connected with the body 200, so that the drawing structure 300 is in a contracted state for facilitating the carrying of the wireless communication device 1000 or an extended state for holding the external device 2000 relative to the body 200. Alternatively, the antenna 10 can transmit or receive signals when the drawer structure 300 is in the extended state.

It is understood that, referring to fig. 6, when the antenna assembly 100 is drawn away from the housing 200, the drawing structure 300 in the extended state can be used to hold an external device 2000 (e.g., a mobile phone, a tablet computer, etc.), and the antenna 10 can better transmit or receive signals. When the antenna assembly 100 is retracted close to the housing 200, the drawing structure 300 is in a contracted state, and the wireless communication device 1000 is convenient to store and carry. When the drawer structure 300 is in the retracted state, at least a portion of the antenna assembly 100 is located within the housing 200. When the drawer structure 300 is in the extended state, the antenna assembly 100 is located outside the body 200. In this way, the occupied space of the wireless communication device 1000 can be reduced, and the normal operation of the wireless communication device 1000 is not affected.

In one embodiment, the wireless communication device 1000 is a remote control that includes an antenna assembly 100 disposed in its body 200, the antenna assembly 100 including a housing 22 and two spaced apart antennas 10 disposed within the housing 22. The body 200 is provided with a control member for inputting a control command. That is, the user holds the body 200 of the remote controller and generates the operation command by operating the operation member. The radiation directions of the two antennas 10 are directed in front of the user.

In the illustrated embodiment, the drawing structure 300 includes a telescopic rod 302 connected to the housing 22 of the antenna assembly 100, and the drawing structure 300 can be in a retracted state for being carried by the wireless communication device 1000 or an extended state for holding the external device 2000 (mobile phone) relative to the body 200 by sliding the telescopic rod 302. The number of the telescopic rods 302 may be two, and the telescopic rods 302 may be metal telescopic rods. The housing 22 and the telescoping rod 302 are part of a device that holds the external device 2000.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The above disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of the specific examples are described above. 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.

In the description of the present specification, reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "example", "specific example", or "some examples" or the like 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 antenna assembly, comprising:

2. The antenna assembly of claim 1, wherein the antenna is provided with a positioning hole, and the fixing structure comprises a fixing post, the fixing post is disposed on an inner surface of the housing, and the fixing post penetrates through the positioning hole to fix the antenna to the supporting surface of the rib.

3. The antenna assembly of claim 2, wherein the housing, the grid support structure, and the fixation posts are an integrally formed structure.

4. The antenna assembly of claim 1, wherein a height of the grid support structure is related to a frequency of the antenna.

5. The antenna assembly of claim 1, wherein the housing comprises a first housing and a second housing, the first housing and the second housing being removably connected to form a space to accommodate the antenna.

6. The antenna assembly of claim 5, wherein the antenna comprises a radiator and a reflector, the lattice support structure comprises a first lattice support structure and a second lattice support structure, the first lattice support structure is disposed on the first housing inner surface, the second lattice support structure is disposed on the second housing inner surface, the radiator is secured to a ribbed support surface of the first lattice support structure, and the reflector is secured to a ribbed support surface of the second lattice support structure.

7. The antenna assembly of claim 6, wherein the radiator comprises an antenna substrate and a radiating element, the antenna substrate comprising first and second opposing surfaces, the radiating element being disposed on the first surface of the antenna substrate, and the reflector being disposed on the second surface side of the antenna substrate.

8. The antenna assembly of claim 7, wherein the radiating element includes a first radiating branch and a second radiating branch, one of the first radiating branch and the second radiating branch being connected to a feed point, the other of the first radiating branch and the second radiating branch being connected to a ground point, an end portion of the first radiating branch being bent in a direction toward the second radiating branch, and an end portion of the second radiating branch extending in a direction away from the first radiating branch.

9. The antenna assembly of claim 8, wherein the radiating element is a high frequency radiating element, the antenna further comprises a low frequency radiating element, the low frequency radiating element comprises a third radiating branch and a fourth radiating branch, one of the third radiating branch and the fourth radiating branch is connected to the feeding point, the other of the third radiating branch and the fourth radiating branch is connected to the ground point, the third radiating branch and the fourth radiating branch are symmetrically arranged, the third radiating branch comprises a first vertical branch and two second vertical branches, the two second vertical branches are connected to two opposite sides of one end of the first vertical branch through a first transverse branch, and the length of the first vertical branch is greater than that of the second vertical branch.

10. The antenna assembly of claim 9, wherein the reflector comprises a reflective substrate, and a low-frequency reflective branch and a high-frequency reflective branch both disposed on a same surface of the reflective substrate, wherein the low-frequency reflective branch is configured to reflect low-frequency electromagnetic waves radiated by the low-frequency radiating unit, and the high-frequency reflective branch is configured to reflect high-frequency electromagnetic waves radiated by the high-frequency radiating unit.

11. The antenna assembly of claim 10, wherein the low frequency reflective branch comprises a third vertical branch and two second transverse branches, the two second transverse branches connecting two ends of the third vertical branch and extending in a direction of the high frequency reflective branch.

12. The antenna assembly of claim 10, wherein the number of high frequency reflecting branches is two, each of the high frequency reflecting branches being linear.

13. A wireless communication device comprising a housing and an antenna assembly according to any one of claims 1 to 12, the antenna assembly being provided on the housing.

14. The wireless communication device of claim 13, wherein the wireless communication device comprises a remote control for controlling the mobile platform.