WO2017113184A1

WO2017113184A1 - Circuit board and electronic device having same

Info

Publication number: WO2017113184A1
Application number: PCT/CN2015/099853
Authority: WO
Inventors: 王典; 胡孟; 冯建刚; 刘元财
Original assignee: 深圳市大疆创新科技有限公司
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2017-07-06
Also published as: CN107210523B; CN107210523A

Abstract

A circuit board (100) and an electronic device having same. The circuit board (100) comprises: a substrate (11), an antenna (12), and a sensor (13); the sensor (13) and the antenna (12) are both disposed on the substrate (11); the substrate (11) is further provided with an anti-interference element used for reducing the interference between the antenna (12) and the sensor (13).

Description

Circuit board and electronic device having the same

Technical field

The present invention relates to a circuit board and an electronic device having the same.

Background technique

With the popularization and promotion of smart devices and robots, various sensors such as positioning, navigation, vision, and weather have been widely used in these devices and become an indispensable component of these devices. However, since many sensors have special requirements on the environment, if a certain measurement accuracy is required, the working environment is generally demanding, so these sensors are generally placed at structures and locations where the components are less sparse or have less interference. For example, compass sensors have strict requirements for magnetic field environments and need to avoid metal objects. The antenna is also an indispensable component in smart devices and wireless communication. In many smart devices and robot designs, in order to achieve high enough radiation efficiency and performance, the position of the antenna needs to be away from the metal and placed in a relatively sparsely placed position. At the office.

In the traditional design, in order to reduce the interference between the antenna and the sensor and ensure the respective performance, the antenna and the sensor are usually designed separately and placed in different positions, which will occupy a large amount of equipment space and reduce the equipment. The degree of integration. In addition, the limited space limits the number of antennas and sensors.

Summary of the invention

In view of the above, it is necessary to provide a circuit board that integrates both the antenna and the sensor while maintaining the good performance of the antenna and the sensor.

It is also necessary to provide an electronic device having the circuit board.

A circuit board includes: a substrate, an antenna, and a sensor, wherein the sensor and the antenna are disposed on the substrate, and the substrate is further provided with an anti-interference component for reducing the antenna and the sensor Interference.

In some embodiments, the sensor is disposed on another side different from the side of the antenna, and the position of the sensor on the substrate is defined in a predetermined area where the interference to the antenna is less than a preset value. .

In some embodiments, the circuit board further includes an antenna interface connected to the antenna, and a sensor interface electrically connected to the sensor, the antenna interface being electrically connected to the antenna through a coaxial line or a microstrip line And the sensor is electrically connected to the sensor interface through a circuit disposed on the substrate.

In some embodiments, the substrate is a multi-layer structure, at least two of the antenna, the antenna interface, and the sensor interface are disposed on the same layer of the substrate or on different layers.

In some embodiments, the sensor and the antenna are respectively disposed on different layers of the substrate.

In some embodiments, the circuit board includes an antenna interface, a sensor interface, and a connecting wire, and the substrate includes a first layer substrate, a second layer substrate, the antenna including a first portion and a second portion, the first portion And the second portion is respectively disposed on the front and back sides of the first layer substrate, and the sensor interface, the antenna interface, the first portion of the antenna, and the sensor are all disposed on the same side of the first layer substrate On the side, the position of the sensor on the substrate is defined in a predetermined area where the interference to the antenna is less than a preset value; the connecting wire is disposed on a bottom side of the second layer substrate.

In some embodiments, the second portion of the antenna is comprised of a metal sheet, the second portion is coupled to the first portion of the antenna, and the second portion of the antenna is configured to reduce the first portion and the connecting conductor Mutual coupling between.

In some embodiments, the second portion of the antenna is coupled to the first portion of the antenna by a metal via.

In some embodiments, the sensor is electrically connected to the sensor interface through the connecting wires, and the metal vias on the first layer substrate and the second layer substrate.

In some embodiments, the antenna interface is soldered to the first portion of the antenna.

In some embodiments, the anti-interference element is at least one of a decoupling capacitor, a magnetic bead, and a common mode inductor.

In some embodiments, the interference preventing component is disposed around the sensor.

In some embodiments, the antenna is a dipole antenna and the sensor is a compass component.

In some embodiments, the antenna is disposed on the substrate remote from the sensor.

In some embodiments, the circuit board is applied to a robot, an unmanned aerial vehicle, an unmanned boat, or an unmanned vehicle.

An electronic device includes a circuit board including: a substrate, an antenna, and a sensor, wherein the sensor and the antenna are disposed on the substrate, and the substrate is further provided with an anti-interference component for reducing Interference between the antenna and the sensor.

In some embodiments, the substrate is a multi-layer structure, and at least two of the antenna, the antenna interface, and the sensor interface are disposed on the same layer of the substrate or on different layers.

In some embodiments, the electronic device is a robot, an unmanned aerial vehicle, an unmanned vehicle, or an unmanned boat.

Compared with the prior art, the circuit board of the present invention integrates the antenna and the sensor in a highly integrated manner, thereby greatly improving the space utilization rate, facilitating the compact structure and the appearance design; and, by adopting a collaborative design, The sensors and antennas are enabled to not interfere with each other and maintain good performance, respectively.

DRAWINGS

1 is a schematic structural view of a circuit board according to a first preferred embodiment of the present invention.

2 is an exploded view of a circuit board in accordance with a first preferred embodiment of the present invention.

3 is a top plan view of a circuit board in accordance with a first preferred embodiment of the present invention.

Figure 4 is a bottom plan view of a circuit board in accordance with a first preferred embodiment of the present invention.

Figure 5 is an exploded view of a circuit board in accordance with a second preferred embodiment of the present invention.

Main component symbol description

Circuit board 100,200

Substrate 11

Antenna

12, 22

Sensor

13,23

Antenna interface

14,24

Sensor interface

15,25

First layer substrate 26

Second substrate 27

Connecting wire 28

Metal vias 29

Anti-interference component 30

Part 1 221

Part II 222

The invention will be further illustrated by the following detailed description in conjunction with the accompanying drawings.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention without creative efforts are within the scope of the present invention.

Some embodiments of the present invention are described in detail below with reference to the accompanying drawings. The features of the embodiments and examples described below can be combined with each other without conflict.

1 is a schematic structural view of a circuit board 100 according to a first preferred embodiment of the present invention. FIG. 2 is an exploded view of a circuit board 100 according to a first preferred embodiment of the present invention, and FIG. 3 and FIG. 4 are the first embodiment of the present invention. A top view and a bottom view of the circuit board 100 of the preferred embodiment. In the present embodiment, the circuit board 100 is an antenna transmitting device, including, but not limited to, a substrate 11, an antenna 12, a sensor 13, an antenna interface 14, and a sensor interface 15. In the first preferred embodiment, the substrate 11 is a carrier of the antenna 12, the sensor 13, the antenna interface 14, and the sensor interface 15. The substrate 11 may be a single layer substrate or a multilayer substrate. In the preferred embodiment, the circuit board 100 is integrated as a circuit board provided with the above devices. For example, the circuit board 100 may be a flexible circuit board. In other preferred embodiments, the circuit board may also be a non-flexible circuit board, such as a PCB board.

In an embodiment, the antenna 12 can be an antenna device of various types and configurations. In the preferred embodiment, the antenna 12 is a dipole antenna (symmetric vibrator). The dipole antenna is used for transmitting and receiving a signal of a fixed frequency, and is composed of two conductors each having a length of a quarter wavelength of an antenna operating frequency. Therefore, the total length of the dipole antenna is approximately the antenna operation. Half wavelength of the frequency. Therefore, dipole antennas are often referred to as half-wave oscillators. The operating frequency of the dipole antenna is located in the frequency band of the 2.4 GHz band. The specific structure of the dipole antenna is a common structure well known to those skilled in the art and will not be described in detail herein. It can be understood that the operating frequency of the antenna 12 can also be located in other frequency bands.

The sensor 13 is a component that can sense the measured information and convert the sensed information into an electrical signal or other desired form of information output according to a certain rule. In the embodiment, the sensor 13 is described by taking a compass component as an example. In other preferred embodiments, the sensor 13 can also be any suitable sensor for positioning, navigation, vision, weather, and the like. The structure of the compass component is also a common circuit structure well known to those skilled in the art and will not be described in detail herein.

The antenna interface 14 is electrically connected to the antenna 12 by any suitable electrical connection manner such as a coaxial line or a microstrip line. In an embodiment, the antenna interface 14 may be an IPEX terminal. In other preferred embodiments, the antenna interface 14 can also be other types of terminals.

The sensor 13 is electrically connected to the sensor interface 15 through a circuit (not shown) disposed on the substrate 11 to form a complete sensor.

In the first preferred embodiment, as shown in FIG. 1, the antenna 12, the antenna interface 14, and the sensor interface 15 are disposed on the same side of the substrate 11. In other preferred embodiments, at least two of the antenna 12, the antenna interface 14, and the sensor interface 15 may be disposed on the same side of the substrate, or at least two of them may be respectively disposed on the substrate. On the different sides of the 11th. Referring to FIG. 3, the antenna 12, the antenna interface 14, and the sensor interface 15 are disposed on a top layer of the substrate 11. The sensor 13 is disposed on the other side of the substrate 11. For example, as shown in FIG. 4, the sensor 13 is disposed on the bottom layer of the substrate 11. In another embodiment, when the substrate 11 has a multi-layer structure, the sensor 13 may also be disposed on another layer different from the layer where the antenna 12 is located, and connected to the sensor through a wire or the like. At interface 15.

Wherein, the position of the sensor 13 on the substrate 11 is limited within a predetermined area to reduce interference with the antenna 12. The predetermined area may be determined according to the interference of the sensor 13 to the antenna 12 being less than a predetermined value. That is, the interference of the sensor 13 to the antenna 12 is small in the predetermined area. In other preferred embodiments, the predetermined area is differently set according to the structure of the antenna 12 and the structure of the sensor 13.

In the preferred embodiment, if other metal objects and/or devices of different characteristics and sizes are present around the antenna 12, the design of the antenna 12 is relatively uncertain, and the antenna 12 is affected. Radiation efficiency. Therefore, the area occupied by the antenna 12 avoids designing other circuits as much as possible, thereby reducing the influence of other circuits on the performance of the antenna 12.

It should be noted that the relative position between the sensor 13 and the antenna 12 is not limited to the vertical relationship as shown in FIG. 2, and may be a left-right relationship, an overlapping relationship, or the like.

Referring to Figure 5, there is shown an exploded view of a circuit board 200 in accordance with a second preferred embodiment of the present invention. The circuit board 200 of the second preferred embodiment also includes the antenna 22, the sensor 23, the antenna interface 24, and the sensor interface 25 as compared to the first preferred embodiment. The types and functions of the same or similar elements in the present embodiment as those in the above-described first embodiment will not be described herein. The circuit board 200 includes a first layer substrate 26, a second layer substrate 27, and connection wires 28.

In the second preferred embodiment, the antenna 22 is also described by taking a dipole antenna as an example. In the preferred embodiment, the antenna 22 is divided into a first portion 221 and a second portion 222. The first portion 221 and the second portion 222 are respectively disposed on the front and back sides of the first layer substrate 26. . In an embodiment, the second portion 222 can be a T-shaped metal sheet that can be mechanically and electrically connected to the first portion 221 through the metal vias 29. In other preferred embodiments, the first portion 221 can also be electrically linked to its second portion 222 in other manners.

The antenna interface 24 is directly connected to a portion of the antenna 22 by soldering, for example, to the first portion 221. The sensor interface 25, the antenna interface 24, the first portion 221, and the sensor 23 are all disposed on the same side of the first layer substrate 26, as shown in FIG. On the upper side of a layer of substrate 26. The second portion 222 is disposed on a lower side of the first layer substrate 26. In order to reduce the influence of the sensor 23 on the antenna 22, the sensor 23 may be disposed at an end of the first layer substrate 26 remote from the antenna 22. The connecting wire 28 is disposed on the bottom layer of the second layer substrate 27. By disposing the connecting wire 28 on the bottom layer of the second layer substrate 27, the interference caused by the connecting wire 28 to the antenna 22 after being energized can be further reduced.

In the preferred embodiment, the first portion 221 is primarily used as a radiator and the second portion 222 is used to match the impedance of the antenna interface 24. The current of the first portion 221 is greater than the current of the second portion 222, and the metal of the second portion 222 can effectively separate the first portion 221 from the connecting wire 28 disposed on the bottom layer, such that The current induced by the first portion 221 on the connecting wire 28 can be reduced, and the mutual coupling can be reduced, thereby further reducing the influence of the connecting wire 28 on the overall performance of the antenna 22.

The sensor 23 is electrically connected to the sensor interface 25 through the connecting wire 28, the first layer substrate 26 and the metal via 29 on the second layer substrate 27. It should be noted that the metal via 29 for connecting the first layer substrate 26 and the second layer substrate 27 and the metal via 29 for connecting the first portion 221 and the second portion 222 may be the same via hole or It is a different via, which can be set according to actual needs.

It should be noted that, in the foregoing first embodiment and the second embodiment, in order to reduce the interference of the radio signal on the sensor at the antenna radiation, the circuit board is designed to evaluate the respective response frequencies of the antenna and the sensor. The design of the sensor peripheral circuit is performed in accordance with the mutual response. In an embodiment, the circuit board is provided with an anti-interference element 30 for reducing interference between the antenna and the sensor. In an embodiment, an anti-interference component 30 may be disposed around the sensor, and the anti-interference component 30 may be at least one of a decoupling capacitor, a magnetic bead, and a common mode inductor, thereby reducing the antenna. Interference with the sensor. In other preferred embodiments, the interference preventing component 30 can also be disposed in the sensor (eg, a power source (not shown) of the sensor. Of course, in other preferred embodiments, the circuit layout of the sensor And the traces can also be properly laid out to reduce radiation coupling.

In an embodiment, the circuit board can be applied to mobile electronic devices such as robots, unmanned aerial vehicles, unmanned vehicles, unmanned vehicles (not shown), and the circuit board can also be applied to smart devices (figure Any suitable electronic device, such as not shown).

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformation of the present invention and the contents of the drawings may be directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of 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

A circuit board, comprising: a substrate, an antenna, and a sensor, wherein the sensor and the antenna are disposed on the substrate, and the substrate is further provided with an anti-interference component for reducing the Interference between the antenna and the sensor.
The circuit board according to claim 1, wherein said sensor is disposed on a different side from a side on which said antenna is located, and a position of said sensor on said substrate is limited to interference with said antenna Within a predetermined area that is less than the preset value.
The circuit board according to claim 1, wherein said circuit board further comprises an antenna interface connected to the antenna, and a sensor interface electrically connected to said sensor, said antenna interface passing through a coaxial line or a microstrip A wire is electrically connected to the antenna, and the sensor is electrically connected to the sensor interface through a circuit disposed on the substrate.
The circuit board according to claim 3, wherein the substrate is a multi-layer structure, and at least two of the antenna, the antenna interface, and the sensor interface are disposed on the same layer or on different layers of the substrate. .
The circuit board according to claim 4, wherein said sensor and said antenna are respectively disposed on different layers of said substrate.
The circuit board according to claim 1, wherein said circuit board comprises an antenna interface, a sensor interface, and a connecting wire, and said substrate comprises a first layer substrate, a second layer substrate, said antenna comprising a first portion and In a second part, the first portion and the second portion are respectively disposed on the front and back sides of the first layer substrate, and the sensor interface, the antenna interface, the first portion of the antenna, and the sensor are all disposed at The same side of the first layer substrate, the position of the sensor on the substrate is defined in a predetermined area where the interference to the antenna is less than a preset value; the connecting wire is disposed on the second layer substrate The bottom side.
The circuit board according to claim 6, wherein the second portion of the antenna is formed of a metal piece, the second portion is connected to the first portion of the antenna, and the second portion of the antenna is used to lower the The mutual coupling between the first portion and the connecting wire.
The circuit board of claim 7 wherein the second portion of the antenna is coupled to the first portion of the antenna by a metal via.
The circuit board according to claim 6, wherein the sensor is electrically connected to the sensor interface through the connecting wire and the metal via on the first layer substrate and the second layer substrate .
The circuit board of claim 6 wherein said antenna interface is soldered to said first portion of said antenna.
The circuit board according to claim 1, wherein the interference preventing component is at least one of a decoupling capacitor, a magnetic bead, and a common mode inductor.
The circuit board according to claim 10, wherein said interference preventing member is disposed around said sensor.
The circuit board of claim 1 wherein said antenna is a dipole antenna and said sensor is a compass component.
The circuit board according to claim 1, wherein said antenna is disposed on said substrate away from said sensor.
The circuit board of claim 1 wherein said circuit board is applied to a robot, an unmanned aerial vehicle, an unmanned vehicle, or an unmanned vehicle.
An electronic device, comprising: a circuit board, the circuit board comprising: a substrate, an antenna and a sensor, wherein the sensor and the antenna are both disposed on the substrate, and the substrate is further provided with An interference preventing component for reducing interference between the antenna and the sensor.
The electronic device according to claim 16, wherein said sensor is disposed on another side different from a side on which said antenna is located, and a position of said sensor on said substrate is limited to interference with said antenna Within a predetermined area that is less than the preset value.
The electronic device according to claim 16, wherein the circuit board further comprises an antenna interface connected to the antenna, and a sensor interface electrically connected to the sensor, the antenna interface passing through a coaxial line or a microstrip A wire is electrically connected to the antenna, and the sensor is electrically connected to the sensor interface through a circuit disposed on the substrate.
The electronic device according to claim 18, wherein the substrate is a multi-layer structure, at least two of the antenna, the antenna interface and the sensor interface are disposed on the same layer of the substrate or different layers on.
The electronic device according to claim 19, wherein said sensor and said antenna are respectively disposed on different layers of said substrate.
The electronic device according to claim 16, wherein the circuit board comprises an antenna interface, a sensor interface, and a connecting wire, and the substrate comprises a first layer substrate and a second layer substrate, the antenna comprising a first portion and In a second part, the first portion and the second portion are respectively disposed on the front and back sides of the first layer substrate, and the sensor interface, the antenna interface, the first portion of the antenna, and the sensor are all disposed at The same side of the first layer substrate, the position of the sensor on the substrate is defined in a predetermined area where the interference to the antenna is less than a preset value; the connecting wire is disposed on the second layer substrate The bottom side.
The electronic device according to claim 21, wherein the second portion of the antenna is formed of a metal piece, the second portion is connected to the first portion of the antenna, and the second portion of the antenna is used to lower the The mutual coupling between the first portion and the connecting wire.
The electronic device of claim 22 wherein the second portion of the antenna is coupled to the first portion of the antenna via a metal via.
The electronic device according to claim 21, wherein the sensor is electrically connected to the sensor interface through the connecting wire and the metal via on the first layer substrate and the second layer substrate .
The electronic device of claim 21 wherein said antenna interface is soldered to said first portion of said antenna.
The electronic device according to claim 16, wherein the interference preventing component is at least one of a decoupling capacitor, a magnetic bead, and a common mode inductor.
The electronic device according to claim 25, wherein said interference preventing member is disposed around said sensor.
The electronic device of claim 16 wherein said antenna is a dipole antenna and said sensor is a compass component.
The electronic device according to claim 16, wherein said antenna is disposed on said substrate away from said sensor.
The electronic device of claim 16 wherein said electronic device is a robot, an unmanned aerial vehicle, an unmanned vehicle or an unmanned vehicle.