CN108780943B

CN108780943B - Antenna assembly and camera comprising same

Info

Publication number: CN108780943B
Application number: CN201780016778.3A
Authority: CN
Inventors: 李栋
Original assignee: SZ DJI Technology Co Ltd
Current assignee: SZ DJI Technology Co Ltd
Priority date: 2017-12-27
Filing date: 2017-12-27
Publication date: 2021-03-05
Anticipated expiration: 2037-12-27
Also published as: CN112886237A; WO2019127091A1; CN108780943A

Abstract

The application discloses an antenna assembly and a camera including the same. The antenna assembly includes a motherboard, an antenna radiator, and a flexible circuit board. The antenna radiator is electrically connected with the mainboard. The flexible circuit board is attached to the surface of the antenna radiator, and the antenna radiator supports the flexible circuit board.

Description

Antenna assembly and camera comprising same

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to an antenna assembly and a camera including the same.

Background

As wireless communications become more widely used, antenna assemblies are used in many devices to facilitate wireless signal transmission. Some existing devices are specially designed with antenna assemblies for wireless connection inside, and radiating bodies and other devices of the antenna assemblies need to keep a certain distance, so that the antenna assemblies occupy a large space, and therefore the miniaturization of the devices is not facilitated, the integration level is not high, and the structure is not compact.

Disclosure of Invention

The application provides a wireless component with high integration and compact structure and a camera comprising the wireless component.

According to an aspect of an embodiment of the present application, there is provided an antenna assembly including: a main board; the antenna radiator is electrically connected with the mainboard; and the flexible circuit board is attached to the surface of the antenna radiating body, and the antenna radiating body supports the flexible circuit board.

According to another aspect of an embodiment of the present application, there is provided a camera including: a housing; a camera body mounted within the housing; and an antenna assembly mounted on the camera body, including: a main board; the antenna radiator is electrically connected with the mainboard and is fixedly arranged on the camera main body; and the flexible circuit board is attached to the surface of the antenna radiating body, and the antenna radiating body supports the flexible circuit board.

The antenna radiator of this application can be used for supporting the flexible circuit board, as the stiffening plate of flexible circuit board, and the space that antenna module occupy so is little, and the integrated level is high and compact structure.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.

FIG. 1 is a partial perspective view of one embodiment of a camera of the present application.

Fig. 2 is a perspective view of a main board and an antenna radiator of an antenna assembly of the camera shown in fig. 1.

Fig. 3 is a front view of the board and the antenna radiator shown in fig. 2.

Fig. 4 is a return loss waveform diagram of the antenna assembly.

Fig. 5 is a waveform diagram of the radiation efficiency of the antenna assembly.

Fig. 6 is a 3D directional radiation pattern of the antenna assembly.

Fig. 7 is a 3D directional radiation pattern at another frequency of the antenna assembly.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The antenna assembly of the embodiment of the application comprises a mainboard, an antenna radiator and a flexible circuit board. The antenna radiator is electrically connected with the mainboard. The flexible circuit board is attached to the surface of the antenna radiator, and the antenna radiator supports the flexible circuit board. The antenna radiator can be used for supporting the flexible circuit board and used as a reinforcing plate of the flexible circuit board, so that the antenna assembly occupies a small space, and is high in integration level and compact in structure.

The camera of the embodiment of the present application includes a housing, a camera body, and an antenna assembly. The camera body is mounted in the housing. An antenna assembly is mounted on the camera body. The antenna assembly includes a motherboard, an antenna radiator, and a flexible circuit board. The antenna radiator is electrically connected with the mainboard. The flexible circuit board is attached to the surface of the antenna radiator, and the antenna radiator supports the flexible circuit board. The antenna radiator can be used for supporting the flexible circuit board and used as a reinforcing plate of the flexible circuit board, so that the space occupied by the antenna assembly is small, the integration level is high, the structure is compact, the internal space of the camera is multiplexed, and the miniaturization of the camera is facilitated.

The antenna assembly and the camera of the present application are described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.

FIG. 1 illustrates a partial perspective view of one embodiment of a camera 10. Fig. 1 shows some elements inside the camera 10. The camera 10 includes a housing 11, a camera body 12, and an antenna assembly 13. The antenna assembly 13 may be used in a camera 10, a tablet computer or other devices requiring wireless communication. In one embodiment, the camera 10 may be a motion camera.

The housing 11 may be made of a metal material, such as an aluminum alloy. Only the rear cover of the housing 11 is shown in fig. 1, and the front cover, the upper cover, and the bottom cover are removed and not shown. The camera body 12 is mounted in the housing 11. The camera body 12 may be mounted with a display screen 14, the display screen 14 being embedded in a rear cover of the housing 11 in a rectangular frame shape. In some embodiments, the camera body 12 may mount a floodlight, a shutter unit, an image sensor, a digital image processor, and the like. A battery, a memory card, etc. may also be mounted in the housing 11.

The antenna assembly 13 is mounted on the camera body 12, and includes a main board 131, an antenna radiator 132, and a flexible circuit board 133. The antenna assembly 13 is used for transmitting and receiving electromagnetic waves, and realizes wireless communication with other devices. The antenna assembly 13 in this embodiment is a built-in antenna assembly, located inside the housing 11 of the camera 10. The antenna assembly 13 may include a WiFi antenna, a Bluetooth antenna, a 3G/4G antenna, or a GPS monopole antenna.

Figure 2 shows a perspective view of the main board 131 and the antenna radiator 132 of the antenna component 13,

fig. 3 is a front view of the board 131 and the antenna radiator 132 shown in fig. 2. Referring to fig. 1-3, in the illustrated embodiment, the main board 131 is mounted on the front side of the camera body 12. The motherboard 131 includes a printed circuit board 1311 and a radio frequency circuit 1312 mounted on the printed circuit board 1311. The rf circuit 1312 generates an rf signal, which is electrically connected to the antenna radiator 132. The rf circuit 1312 may include an rf chip 1313, and the rf chip 1313 is electrically connected to the antenna radiator 132. The rf chip 1313 provides rf signals, which are radiated by the antenna radiator 132.

In one embodiment, the rf signal output terminal of the rf chip 1313 is electrically connected to the antenna radiator 132 through the elastic pin 134. In one embodiment, the rf chip 1313 is electrically connected to the antenna radiator 132 through a feed (e.g., coaxial, etc.), and transmits an rf signal to the antenna radiator 132 through the feed. The inner conductor of the feed line (e.g., inner core of the feed line) electrically connects the rf signal output of the rf chip 1313 and the antenna radiator 132, and the outer conductor (e.g., outer skin of the feed line) is grounded. The external conductor may be connected to a ground terminal of the rf chip 1313, and the ground terminal of the rf chip 1313 is connected to a ground line of the printed circuit board 1311. Or the outer conductor may be directly connected to a ground line of the printed circuit board 1311.

In the illustrated embodiment, the rf chip 1313 is mounted on a side of the printed circuit board 1311 facing the camera body 12, i.e., a rear side of the printed circuit board 1311. The rf circuit 1312 may also include other components electrically connected to the rf chip 1313. Motherboard 131 may also include other circuit elements, such as image processing circuitry, mounted on printed circuit board 1311.

The antenna radiator 132 is electrically connected to the board 131. In the illustrated embodiment, the antenna radiator 132 is a flat antenna radiator and is fixedly mounted on the camera body 12. The antenna radiator 132 is a metal plate, and may be fixed to a plastic body (not shown), and attached to the camera body 12 together with the plastic body. The plastic body can support the antenna radiator 132, so as to ensure the structural stability of the antenna radiator 132.

The flexible circuit board 133 is attached to the surface of the antenna radiator 132, and the antenna radiator 132 supports the flexible circuit board 133. The flexible circuit board 133 is electrically connected to the main board 131. The antenna radiator 132 is located between the flexible circuit board 133 and the camera body 12. The antenna radiator 132 may serve as a reinforcing plate of the flexible circuit board 133. The antenna radiator 132 can radiate a wireless signal, and can support the flexible circuit board 133, and the antenna radiator 132 and the reinforcing plate of the flexible circuit board 133 are integrated into one, so that the antenna radiator 132 and the reinforcing plate of the flexible circuit board 133 which are independent of each other do not need to be arranged, the space occupied by the antenna assembly 13 is small, the space is multiplexed, the integration level is high, the structure is compact, and the miniaturization of devices such as a camera is facilitated.

In the illustrated embodiment, the antenna radiator 132 includes a first radiation portion 1321 supporting the flexible circuit board 133, a second radiation portion 1322 spaced apart from the first radiation portion 1321, and a connection portion 1323 connecting one end of the second radiation portion 1322 and the first radiation portion 1321.

In the illustrated embodiment, the first radiation portion 1321 extends along the top surface and the side surface of the camera body 12. First radiating portion 1321 includes first substrate 1324, second substrate 1325 that forms an angle with the extending direction of first substrate 1324, and third substrate 1326 that connects first substrate 1324 and second substrate 1325. In the illustrated embodiment, the first substrate 1324 extends along a top surface of the camera body 12. In one embodiment, first substrate 1324 is within the top surface of camera body 12, not beyond the edges of the top surface of camera body 12.

In the illustrated embodiment, the second substrate 1325 extends along a side of the camera body 12. The second substrate 1325 is located on the right side of the camera body 12, and the second substrate 1325 is perpendicular to the first substrate 1324. In one embodiment, the upper edge of second substrate 1325 is lower than the top surface of camera body 12. The antenna radiator 132 is formed with a relief hole 1327. In the illustrated embodiment, the relief holes 1327 are formed in the second substrate 1325. The relief holes 1327 may be rectangular. In other embodiments, the relief holes 1327 may be circular or other shapes.

In the illustrated embodiment, third substrate 1326 extends generally along the top surface of camera body 12, closer to the top surface of camera body 12 than first substrate 1324. The third substrate 1326 has a side edge extending beyond the right side surface of the camera body 12 and is connected to the second substrate 1325. In the illustrated embodiment, the junction of third substrate 1326 and first substrate 1324 transitions in a circular arc, and the junction of third substrate 1326 and second substrate 1325 transitions in a circular arc. The width of third substrate 1326 is smaller than the width of first substrate 1324 and smaller than the width of second substrate 1325. The first substrate 1324 protrudes in a direction away from the main board 131 with respect to the third substrate 1326. The second substrate 1325 protrudes in a direction close to the main board 131 with respect to the third substrate 1326.

The second radiation portion 1322 is located at a side of the first radiation portion 1321 close to the main board 131. In the illustrated embodiment, the second radiation portion 1322 is located outside the flexible circuit board 133. The second radiation portion 1322 has an elongated shape. In the illustrated embodiment, the second radiation portions 1322 extend toward the second substrate 1325 along the side of the third substrate 1326, and the second radiation portions 1322 are spaced apart from the third substrate 1326 and spaced apart from the second substrate 1325. Second radiation portion 1322 forms an "L" shaped space with third substrate 1326 and second substrate 1325. In one embodiment, the second radiation portion 1322 is bent from the connection portion 1323 toward the top surface of the camera body 12, extends toward the right side surface of the camera body 12, and extends beyond the right side surface of the camera body 12.

In the illustrated embodiment, the connection portion 1323 is located outside the flexible circuit board 133. The connection portion 1323 extends from the front edge of the first substrate 1321 toward the main plate 131, and connects the second radiation portion 1322. In the illustrated embodiment, the connection portion 1323 is flush with the first substrate 1321, extending along the top surface of the camera body 12.

The antenna radiator 132 includes a feeding end 1328 extending from an end of the second radiation portion 1322 connected to the connection portion 1323, and the feeding end 1328 is electrically connected to the board 131. The feed terminal 1328 may be electrically connected to the rf signal output terminal of the rf chip 1313 on the motherboard 131. The feed terminal 1328 may be electrically connected to the rf signal output terminal of the rf chip 1313 through the inner conductor or spring pin 134 of the feed line. In the illustrated embodiment, the feed end 1328 extends at an angle relative to the connection 1323. The feed end 1328 extends substantially perpendicular to the connection portion 1323 toward the top surface of the camera body 12. In the illustrated embodiment, the feed end 1328 is located outside of the flexible circuit board 133.

In the illustrated embodiment, the antenna radiator 132 includes an extension portion 1329 extending from the first radiation portion 1321, and the extension portion 1329 is located outside the flexible circuit board 133. In the illustrated embodiment, the extension 1329 extends from the first base 1324 of the first radiating portion 1321 in a direction away from the third base 1326. Extensions 1329 and third base 1326 are located on opposite sides of first base 1324, on the left and right sides of first base 1324, respectively. In the illustrated embodiment, the extension 1329 extends along the top surface of the camera body 12 closer to the top surface of the camera body 12 than the first substrate 1324. In the illustrated embodiment, the junction of the extension 1329 and the first base 1324 is in a circular arc transition. In the illustrated embodiment, the extending portion 1329 has a through hole 1320, which can be clamped with a plastic body supporting the antenna radiator 132. One or more through holes 1320 may be opened.

In one embodiment, the flexible circuit board 133 is attached to the antenna radiator 132, extends from the front side of the antenna radiator 132 to the board 131, and can be electrically connected to a connector (not shown) mounted on the front side of the board 131. In the illustrated embodiment, the flexible circuit board 133 is mounted with a button 1331, and the button 1331 is protruded from a surface of the flexible circuit board 133 facing away from the antenna radiator 132. The button 1331 is located above the first substrate 1324 and protrudes from the top surface of the flexible circuit board 133.

In the illustrated embodiment, the flexible circuit board 133 is mounted with a microphone 1332, and the microphone 1332 is protruded from a surface of the flexible circuit board 133 facing away from the antenna radiator 132. The microphone 1332 is located outside the second substrate 1325 and protrudes to the right side of the flexible circuit board 133. In the illustrated embodiment, the microphone 1332 is located at a position of the flexible circuit board 133 corresponding to the relief hole 1327 of the second substrate 1325. A microphone chip (not shown) is connected to the back surface of the microphone 1332, and the offset hole 1327 offsets the microphone chip, so that the structure is more compact. The shape of the escape hole 1327 may correspond to the shape of the microphone chip. In some embodiments, other components may also be disposed on the flexible circuit board 133.

The above is merely an example of the antenna assembly 13, but is not limited to the above example. In some embodiments, the shape and structure of the antenna radiator 132 of the antenna assembly 13 may be designed according to the requirements of the actual application for radiating radio frequency signals of different frequencies and/or the matching of the antenna radiator with its surrounding elements. In some embodiments, the camera 10 may be used in a drone, the drone taking an aerial photograph with the camera 10, or the like. Of course, the camera 10 may also be used on other devices, or used independently.

Fig. 4 shows a return loss diagram of the antenna assembly 13 of the embodiment shown in fig. 1-3. As can be seen from fig. 4, the antenna assembly 13 has a resonance at 2.3GHz, 4.3GHz and 6.5GHz, respectively.

Fig. 5 shows a radiation efficiency diagram of the antenna assembly 13. It can be seen from fig. 5 that the radiation efficiency of the antenna assembly 13 at the resonance point shown in fig. 4 is about 1dB, the radiation efficiency is greater than 90%, and the performance of the antenna assembly 13 is good.

Fig. 6 shows the 3D directional radiation pattern of the antenna assembly 13 at low frequency, 2.6 GHz.

Fig. 7 shows the 3D directional radiation pattern of the antenna assembly 13 at high frequency, 5.6 GHz. As can be seen from fig. 6 and 7, the antenna radiator 132 of the antenna assembly 13 radiates in three-dimensional directions of space, and the radiation space is substantially spherical, so as to meet the requirement that devices such as cameras radiate signals in all directions.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The method and apparatus provided by the embodiments of the present invention are described in detail above, and the principle and the embodiments of the present invention are explained in detail herein by using specific examples, and the description of the embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

The disclosure of this patent document contains material which is subject to copyright protection. The copyright is owned by the copyright owner. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the patent and trademark office official records and records.

Claims

1. An antenna assembly, comprising:

a main board;

the antenna radiator is electrically connected with the mainboard; and

the flexible circuit board is attached to the surface of the antenna radiating body, and the antenna radiating body supports the flexible circuit board; the flexible circuit board is electrically connected with the mainboard, a key is installed on the flexible circuit board, and the key is convexly arranged on the surface of one side, back to the antenna radiator, of the flexible circuit board.

2. The antenna assembly according to claim 1, wherein the antenna radiator includes a first radiation portion supporting the flexible circuit board, a second radiation portion provided at a distance from the first radiation portion, and a connection portion connecting one end of the second radiation portion and the first radiation portion.

3. The antenna assembly of claim 2, wherein the second radiating portion is located outside the flexible circuit board.

4. The antenna assembly of claim 2, wherein the second radiating portion is elongated.

5. The antenna assembly of claim 2, wherein the antenna radiator includes a feed end extending from an end of the second radiating portion connected to the connecting portion, the feed end being electrically connected to the board.

6. The antenna assembly of claim 5, wherein the feed end extends at an angle relative to the connection portion.

7. The antenna assembly of claim 5, wherein the feed end is located outside the flexible circuit board.

8. The antenna assembly of claim 2, wherein the first radiating portion comprises a first substrate, a second substrate angled with respect to a direction of extension of the first substrate, and a third substrate connecting the first substrate and the second substrate.

9. The antenna assembly of claim 8, wherein the second radiating portion extends toward the second substrate along a side of the third substrate, the second radiating portion being spaced from the third substrate and spaced from the second substrate.

10. The antenna assembly of claim 2, wherein the antenna radiator includes an extension portion extending from the first radiating portion, the extension portion being located outside the flexible circuit board.

11. The antenna assembly of claim 1, wherein the flexible circuit board has a microphone mounted thereon, the microphone being disposed to protrude from a surface of the flexible circuit board facing away from the antenna radiator.

12. The antenna assembly of claim 11, wherein the antenna radiator is formed with an offset hole, and the microphone is located at a position of the flexible circuit board corresponding to the offset hole.

13. The antenna assembly of claim 12, wherein the relief hole is rectangular.

14. A camera, characterized in that it comprises:

a housing;

a camera body mounted within the housing; and

an antenna assembly mounted on the camera body, comprising:

a main board;

the antenna radiator is electrically connected with the mainboard and is fixedly arranged on the camera main body; and

15. The camera according to claim 14, wherein the antenna radiator includes a first radiation portion supporting the flexible circuit board, a second radiation portion spaced apart from the first radiation portion, and a connection portion connecting one end of the second radiation portion and the first radiation portion.

16. The camera of claim 15, wherein the second radiation site is located outside the flexible circuit board.

17. The camera according to claim 15, wherein the second radiation portion is elongated.

18. The camera of claim 15, wherein the antenna radiator includes a feeding terminal extending from an end of the second radiation portion connected to the connection portion, the feeding terminal being electrically connected to the board.

19. The camera of claim 18, wherein the feed end extends at an angle relative to the connection portion.

20. The camera of claim 18, wherein the feed end is located outside the flexible circuit board.

21. The camera according to claim 15, wherein the first radiation portion includes a first substrate, a second substrate that is angled with respect to an extending direction of the first substrate, and a third substrate that connects the first substrate and the second substrate.

22. The camera of claim 21, wherein the second radiating portion extends toward the second substrate along a side of the third substrate, and the second radiating portion is spaced apart from the third substrate and from the second substrate.

23. The camera of claim 15, wherein the antenna radiator comprises an extension portion extending from the first radiating portion, the extension portion being located outside the flexible circuit board.

24. The camera of claim 14, wherein the flexible circuit board has a microphone mounted thereon, and the microphone is protruded from a surface of the flexible circuit board facing away from the antenna radiator.

25. The camera of claim 24, wherein the antenna radiator is formed with a hole, and the microphone is located at a position of the flexible circuit board corresponding to the hole.

26. The camera of claim 25, wherein the relief hole is rectangular.