WO2019127091A1

WO2019127091A1 - Antenna assembly and camera comprising antenna assembly

Info

Publication number: WO2019127091A1
Application number: PCT/CN2017/118969
Authority: WO
Inventors: 李栋
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2017-12-27
Filing date: 2017-12-27
Publication date: 2019-07-04
Also published as: CN108780943A; CN112886237A; CN108780943B

Abstract

Disclosed in the present application are an antenna assembly and a camera comprising the antenna assembly. The antenna assembly comprises a main board, an antenna radiator, and a flexible circuit board. The antenna radiator is electrically connected to the main board. The flexible circuit board is attached to a surface of the antenna radiator, and the antenna radiator supports the flexible circuit board.

Description

Antenna assembly and camera including the antenna assembly

Technical field

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

Background technique

As wireless communications become more widely used, antenna components are used to implement wireless signal transmission in many devices. Some existing devices are specially designed for wirelessly connecting antenna components. The radiators of the antenna components and other devices need to be kept at a certain distance, so that the antenna components occupy a large space, which is disadvantageous to miniaturization of the device and low integration. And the structure is not compact.

Summary of the invention

The present application provides a highly integrated and compact wireless component and a camera including the wireless component.

According to an aspect of the embodiments of the present application, an antenna assembly includes: a main board; an antenna radiator electrically connected to the main board; and a flexible circuit board attached to a surface of the antenna radiator, the antenna radiator Supporting the flexible circuit board.

According to another aspect of the embodiments of the present application, a camera includes: a housing; a camera body mounted in the housing; and an antenna assembly mounted on the camera body, including: a main board; an antenna radiator; The motherboard is electrically connected and fixedly mounted to the camera body; and a flexible circuit board is attached to the surface of the antenna radiator, and the antenna radiator supports the flexible circuit board.

The antenna radiator of the present application can be used to support a flexible circuit board as a reinforcing board of a flexible circuit board, so that the antenna assembly occupies a small space, is highly integrated, and has a compact structure.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. Other drawings may also be obtained from those of ordinary skill in the art in view of the drawings.

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

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

3 is a front elevational view of the main board and antenna radiator shown in FIG. 2.

4 is a waveform diagram of return loss of an antenna assembly.

Figure 5 is a graph showing the radiation efficiency waveform of the antenna assembly.

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

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

Detailed ways

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the drawings in the embodiments of the present application. 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 obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope are the scope of the present application.

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The following description refers to the same or similar elements in the different figures unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with aspects of the present application as detailed in the appended claims.

The terminology used in the present application is for the purpose of describing particular embodiments, and is not intended to be limiting. The singular forms "a", "the" and "the" 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, the terms "front", "rear", "lower" and/or "upper" are used for convenience of description and are not limited to one location or one spatial orientation. The words "connected" or "connected" and the like are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.

The antenna assembly of the embodiment of the present application includes a main board, an antenna radiator, and a flexible circuit board. The antenna radiator is electrically connected to the main board. 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 to support the flexible circuit board as a reinforcing board of the flexible circuit board, so that the antenna assembly occupies small space, high integration and compact 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. The antenna assembly is mounted on the camera body. The antenna assembly includes a main board, an antenna radiator, and a flexible circuit board. The antenna radiator is electrically connected to the main board. 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 to support the flexible circuit board as a reinforcing board of the flexible circuit board, so that the antenna assembly occupies small space, high integration and compact structure, and the internal space of the camera is reused, which is advantageous for miniaturization of the camera.

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

FIG. 1 shows a partial perspective view of one embodiment of a camera 10. FIG. 1 shows some of the components inside the camera 10. The camera 10 includes a housing 11, a camera body 12, and an antenna assembly 13. The antenna assembly 13 can be used in the camera 10, and can also be used in tablets or other devices that require wireless communication. In one embodiment, camera 10 may be a motion camera.

The outer casing 11 may be made of a metal material such as an aluminum alloy. Only the rear cover of the outer casing 11 is shown in Fig. 1, and the front cover, the upper cover and the bottom cover are removed, not shown. The camera body 12 is mounted within the housing 11. The camera body 12 can be mounted with a display screen 14 that fits within the rear cover of the housing 11 in the form of a rectangular frame. In some embodiments, the camera body 12 can be equipped with a astigmatism lamp, a shutter unit, an image sensor, a digital image processor, and the like. A battery, a memory card, and the like can also be mounted in the casing 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 to transmit and receive electromagnetic waves for wireless communication with other devices. The antenna assembly 13 in this embodiment is a built-in antenna assembly located inside the casing 11 of the camera 10. The antenna assembly 13 may include a WiFi antenna, a Bluetooth antenna, a 3G/4G antenna, or a GPS single stage antenna.

2 is a perspective view of the main board 131 and the antenna radiator 132 of the antenna assembly 13, and FIG. 3 is a front view of the main board 131 and the antenna radiator 132 shown in FIG. 2. Referring to FIGS. 1-3, in the illustrated embodiment, the main board 131 is mounted to the front side of the camera body 12. The main board 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 a radio frequency signal that is electrically coupled to the antenna radiator 132. The RF circuit 1312 can include a radio frequency chip 1313 that is electrically coupled to the antenna radiator 132. The radio frequency chip 1313 provides a radio frequency signal, and the antenna radiator 132 radiates the radio frequency signal.

In one embodiment, the RF signal output of the RF chip 1313 is electrically coupled to the antenna radiator 132 via the foot 134. In one embodiment, the radio frequency chip 1313 is electrically coupled to the antenna radiator 132 via a feed line (like an axis or the like) through which the radio frequency signal is transmitted to the antenna radiator 132. The inner conductor of the feeder (like the inner core of the axis) electrically connects the RF signal output of the RF chip 1313 to the antenna radiator 132, and the outer conductor (like the outer skin of the axis) is grounded. The outer conductor may be connected to the ground of the radio frequency chip 1313, and the ground end of the radio frequency chip 1313 is connected to the ground line of the printed circuit board 1311. Alternatively, the outer conductor can be directly connected to the ground line of the printed circuit board 1311.

In the illustrated embodiment, the radio frequency chip 1313 is mounted on a side of the printed circuit board 1311 facing the camera body 12, that is, the rear side of the printed circuit board 1311. The RF circuit 1312 may also include other components that are electrically coupled to the RF chip 1313. The main board 131 may also include other circuit components such as image processing circuits mounted on the printed circuit board 1311.

The antenna radiator 132 is electrically connected to the main board 131. In the illustrated embodiment, the antenna radiator 132 is a planar antenna radiator that is fixedly mounted to the camera body 12. The antenna radiator 132 is a metal plate and can 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 to ensure the 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 can serve as a reinforcing plate for the flexible circuit board 133. The antenna radiator 132 can radiate a wireless signal, and can support the flexible circuit board 133. The antenna radiator 132 and the reinforcing board of the flexible circuit board 133 are combined, so that it is not necessary to provide mutually independent antenna radiators 132 and flexible circuit boards 133. The reinforcing plate, the antenna assembly 13 occupies a small space, spatial multiplexing, high integration, compact structure, and is advantageous for miniaturization of cameras and the like.

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

In the illustrated embodiment, the first radiating portion 1321 extends along the top and side faces of the camera body 12. The first radiating portion 1321 includes a first substrate 1324, a second substrate 1325 at an angle to the extending direction of the first substrate 1324, and a third substrate 1326 connecting the first substrate 1324 and the second substrate 1325. In the illustrated embodiment, the first substrate 1324 extends along the top surface of the camera body 12. In one embodiment, the first substrate 1324 is within the top surface of the camera body 12 without exceeding the edge of the top surface of the camera body 12.

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

In the illustrated embodiment, the third substrate 1326 extends generally along the top surface of the camera body 12, adjacent the top surface of the camera body 12 as compared to the first substrate 1324. The side edge of the third substrate 1326 is 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 the third substrate 1326 and the first substrate 1324 has a circular arc surface transition, and the junction of the third substrate 1326 and the second base 1325 has a circular arc surface transition. The width of the third substrate 1326 is smaller than the width of the first substrate 1324 and smaller than the width of the second substrate 1325. The first substrate 1324 protrudes away from the main board 131 with respect to the third substrate 1326. The second substrate 1325 protrudes in a direction toward the main board 131 with respect to the third substrate 1326.

The second radiating portion 1322 is located on a side of the first radiating portion 1321 near the main board 131. In the illustrated embodiment, the second radiating portion 1322 is located outside of the flexible circuit board 133. The second radiating portion 1322 has an elongated shape. In the illustrated embodiment, the second radiating portion 1322 extends along the side of the third substrate 1326 toward the second substrate 1325. The second radiating portion 1322 is spaced apart from the third substrate 1326 and spaced apart from the second substrate 1325. The second radiating portion 1322 forms an "L"-shaped space between the third substrate 1326 and the second substrate 1325. In one embodiment, the second radiating portion 1322 is bent from the connecting portion 1323 toward the top surface of the camera body 12, and then extends to 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 of the flexible circuit board 133. The connecting portion 1323 extends from the front side edge of the first substrate 1321 toward the main board 131, and connects the second radiating portion 1322. In the illustrated embodiment, the connecting portion 1323 is flush with the first substrate 1321 and extends along the top surface of the camera body 12.

The antenna radiator 132 includes a feeding end 1328 extending from one end of the second radiating portion 1322 and the connecting portion 1323, and the feeding end 1328 is electrically connected to the main board 131. The feed end 1328 can be electrically connected to the RF signal output end of the RF chip 1313 on the main board 131. The feed end 1328 can be electrically coupled to the RF signal output of the RF chip 1313 via the inner conductor or leg 134 of the feed line. In the illustrated embodiment, the feed end 1328 is bent and extended relative to the connecting portion 1323. The feed end 1328 extends substantially perpendicular to the connecting portion 1323 to 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 1329 extending from the first radiating portion 1321, the extension 1329 being located outside of the flexible circuit board 133. In the illustrated embodiment, the extension 1329 extends from the first substrate 1324 of the first radiating portion 1321 in a direction away from the third substrate 1326. The extension portion 1329 and the third substrate 1326 are located on opposite sides of the first substrate 1324, respectively located on the left side and the right side of the first substrate 1324. 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 substrate 1324 has a circular arc surface transition. In the illustrated embodiment, the extending portion 1329 is provided with a through hole 1320 that can be engaged with the 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 and extends from the front side of the antenna radiator 132 to the main board 131, and can be electrically connected to a connector (not shown) mounted on the front side of the main board 131. . In the illustrated embodiment, the flexible circuit board 133 is mounted with a button 1331 protruding from a side 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, a microphone 1332 is mounted on the flexible circuit board 133, and the microphone 1332 is protruded from a side 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 from the right side surface of the flexible circuit board 133. In the illustrated embodiment, the microphone 1332 is located at a position where the flexible circuit board 133 corresponds to the yielding hole 1327 of the second substrate 1325. A microphone chip (not shown) is connected to the back surface of the microphone 1332, and the bit hole 1327 is used to give way to the microphone chip, so that the structure is more compact. The shape of the yield hole 1327 can be identical 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 examples. In some embodiments, the shape and structure of the antenna radiator 132 of the antenna assembly 13 can be designed according to the requirements of radiating radio frequency signals of different frequencies and/or the cooperation of the antenna radiator and its surrounding components in practical applications. In some embodiments, the camera 10 can be used with a drone that utilizes the camera 10 for aerial photography and the like. Of course, the camera 10 can also be used on other devices or used independently.

4 is a diagram showing the return loss of the antenna assembly 13 of the embodiment shown in FIGS. 1-3. As can be seen from Figure 4, the antenna assembly 13 has a resonance at 2.3 GHz, 4.3 GHz and 6.5 GHz, 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 1 dB, the radiation efficiency is more than 90%, and the performance of the antenna assembly 13 is good.

Figure 6 shows a 3D directional radiation pattern of the antenna assembly 13 at low frequencies with a frequency of 2.6 GHz. Figure 7 shows a 3D directional radiation pattern of the antenna assembly 13 at high frequencies at a frequency of 5.6 GHz. As can be seen from FIG. 6 and FIG. 7, the antenna radiator 132 of the antenna assembly 13 radiates in a three-dimensional direction of the space, and the radiation space is substantially spherical, which satisfies the need for a device such as a camera to radiate signals in various directions.

It should be noted that, in this context, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these There is any such actual relationship or order between entities or operations. The terms "including", "comprising" or "comprising" or "comprising" are intended to include a non-exclusive inclusion, such that a process, method, article, or device that comprises a plurality of elements includes not only those elements but also other items not specifically listed Elements, or elements that are inherent to such a process, method, item, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

The method and apparatus provided by the embodiments of the present invention are described in detail above. The principles and implementations of the present invention are described in the specific examples. The description of the above embodiments is only used to help understand the method of the present invention and At the same time, there will be changes in the specific embodiments and the scope of application according to the idea of the present invention, and the contents of the present specification should not be construed as limiting the present invention. .

The disclosure of this patent document contains material that is subject to copyright protection. This copyright is the property of the copyright holder. The copyright owner has no objection to the reproduction of the patent document or the patent disclosure in the official records and files of the Patent and Trademark Office.

Claims

An antenna assembly, characterized in that it comprises:

Motherboard

An antenna radiator electrically connected to the motherboard; and

a flexible circuit board attached to a surface of the antenna radiator, the antenna radiator supporting the flexible circuit board.
The antenna assembly according to claim 1, wherein said antenna radiator comprises a first radiating portion supporting said flexible circuit board, a second radiating portion spaced apart from said first radiating portion, and said connecting said a connecting portion of one end of the second radiating portion and the first radiating portion.
The antenna assembly of claim 2 wherein said second radiating portion is located outside said flexible circuit board.
The antenna assembly according to claim 2, wherein said second radiating portion has an elongated shape.
The antenna assembly according to claim 2, wherein said antenna radiator comprises a feeding end extending from an end of said second radiating portion and said connecting portion, said feeding end and said feeding end The motherboard is electrically connected.
The antenna assembly according to claim 5, wherein said feed end is bent and extended with respect to said connecting portion.
The antenna assembly of claim 5 wherein said feed end is located outside said flexible circuit board.
The antenna assembly according to claim 2, wherein the first radiating portion comprises a first substrate, a second substrate at an angle to an extending direction of the first substrate, and the first substrate and the first substrate a third substrate of the two substrates.
The antenna assembly according to claim 8, 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 Provided and spaced apart from the second substrate.
The antenna assembly of claim 2 wherein said antenna radiator comprises an extension extending from said first radiating portion, said extension being located outside said flexible circuit board.
The antenna assembly according to claim 1, wherein a button is mounted on the flexible circuit board, and the button is protruded from a side surface of the flexible circuit board facing away from the antenna radiator.
The antenna assembly according to claim 1, wherein a microphone is mounted on the flexible circuit board, and the microphone is protruded from a side surface of the flexible circuit board facing away from the antenna radiator.
The antenna assembly according to claim 12, wherein the antenna radiator is formed with a yielding hole, and the microphone is located at a position corresponding to the yielding hole of the flexible circuit board.
The antenna assembly of claim 14 wherein said yielding aperture is rectangular.
A camera characterized in that it comprises:

shell;

a camera body mounted in the housing; and

An antenna assembly mounted on the camera body, comprising:

Motherboard

An antenna radiator electrically connected to the main board and fixedly mounted to the camera body; and

a flexible circuit board attached to a surface of the antenna radiator, the antenna radiator supporting the flexible circuit board.
The camera according to claim 15, wherein said antenna radiator comprises a first radiating portion supporting said flexible circuit board, a second radiating portion spaced apart from said first radiating portion, and said connecting said a connecting portion of one end of the second radiating portion and the first radiating portion.
The camera of claim 16 wherein said second radiating portion is located outside said flexible circuit board.
The camera according to claim 16, wherein said second radiating portion has an elongated shape.
The camera according to claim 16, wherein the antenna radiator includes a feeding end extending from an end of the second radiating portion and the connecting portion, the feeding end and the main board Electrical connection.
The camera according to claim 19, wherein said feed end is bent and extended relative to said connecting portion.
The camera of claim 19 wherein said feed end is located outside said flexible circuit board.
The camera according to claim 16, wherein the first radiating portion includes a first substrate, a second substrate at an angle to an extending direction of the first substrate, and a connection between the first substrate and the second a third substrate of the substrate.
The camera according to claim 22, 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 spaced apart from the second substrate.
The camera according to claim 16, wherein said antenna radiator includes an extension extending from said first radiating portion, said extending portion being located outside said flexible circuit board.
The camera according to claim 15, wherein a button is mounted on the flexible circuit board, and the button protrudes from a side surface of the flexible circuit board facing away from the antenna radiator.
The camera according to claim 15, wherein a microphone is mounted on the flexible circuit board, and the microphone is protruded from a side surface of the flexible circuit board facing away from the antenna radiator.
The camera according to claim 26, wherein said antenna radiator is formed with a yielding hole, and said microphone is located at a position of said flexible circuit board corresponding to said yielding hole.
The camera according to claim 27, wherein said yielding holes are rectangular.