CN114243271A

CN114243271A - Antenna device, circuit board assembly and electronic equipment

Info

Publication number: CN114243271A
Application number: CN202111535143.9A
Authority: CN
Inventors: 曹廷友
Original assignee: Realme Mobile Telecommunications Shenzhen Co Ltd
Current assignee: Realme Mobile Telecommunications Shenzhen Co Ltd
Priority date: 2021-12-15
Filing date: 2021-12-15
Publication date: 2022-03-25

Abstract

The application provides an antenna device, a circuit board assembly and an electronic device. The antenna device comprises a functional antenna, an NFC antenna and an SAR sensor. The functional antenna comprises at least one functional chip and at least one functional radiator, wherein the functional chip is electrically connected with the functional radiator and is used for exciting the functional radiator to receive and transmit a target antenna signal; the NFC antenna comprises an NFC chip, and the NFC chip is electrically connected with the functional radiator and used for exciting the functional radiator to receive and transmit NFC signals. The SAR sensor comprises a SAR sensing chip. The SAR induction chip is electrically connected with the functional radiator and used for detecting the capacitance of the functional radiator so as to adjust the power of the functional radiator. The application provides an antenna device, circuit board assembly and electronic equipment's simple structure, the overall arrangement degree of difficulty reduces.

Description

Antenna device, circuit board assembly and electronic equipment

Technical Field

The application relates to the technical field of communication, in particular to an antenna device, a circuit board assembly and electronic equipment.

Background

Near Field Communication (NFC) is an emerging technology, and devices using the NFC technology can exchange data when being close to each other, thereby implementing functions such as mobile payment, electronic ticketing, door access, mobile identity recognition, anti-counterfeiting, and the like. The electromagnetic wave Absorption Rate (SAR) detection technology can reduce electromagnetic radiation and harm to users. However, in the related art, the antenna device to which the NFC technology and the SAR technology are applied has a complicated structure, which is disadvantageous for its layout in the electronic device.

Disclosure of Invention

The application provides an antenna device, a circuit board assembly and an electronic device with simple structures.

In one aspect, the present application provides an antenna apparatus, comprising:

the functional antenna comprises a functional chip and at least one functional radiator, wherein the functional chip is electrically connected with the functional radiator and is used for exciting the functional radiator to receive and transmit a target antenna signal; and

the NFC antenna comprises an NFC chip, and the NFC chip is electrically connected with the functional radiator and is used for exciting the functional radiator to receive and transmit NFC signals; and

SAR inductor, the SAR inductor includes SAR response chip, SAR response chip electric connection the function irradiator is used for detecting the electric capacity of function irradiator is in order to adjust the power of function irradiator.

On the other hand, the application also provides a circuit board assembly, which comprises a circuit board and the antenna device, wherein the functional radiator is arranged on the circuit board.

In another aspect, the present application further provides an electronic device, which includes a housing and the circuit board assembly, wherein the circuit board assembly is disposed in the housing.

The utility model provides an antenna device is because function chip, NFC chip and SAR response chip all electric connection function irradiator, consequently function chip can encourage function irradiator receiving and dispatching target antenna signal, the NFC chip can encourage function irradiator receiving and dispatching NFC signal, SAR inductor accessible detects the electric capacity of function irradiator and then the power of regulatory function irradiator, function chip, NFC chip and SAR response chip share same irradiator promptly, reducible antenna device's spare part quantity simplifies antenna device's structure. The application provides a circuit board subassembly and electronic equipment is because of including above-mentioned antenna device, therefore simple structure, the overall arrangement degree of difficulty reduces.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below.

Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure; wherein the electronic device comprises a housing and a circuit board assembly;

FIG. 2 is an exploded view of the electronic device of FIG. 1;

FIG. 3 is a schematic plan view of the electronic device of FIG. 2;

FIG. 4 is a schematic plan view of a circuit board assembly of the electronic device of FIG. 3; the circuit board assembly comprises a first circuit board, a second circuit board and an antenna device;

FIG. 5 is another schematic plan view of a circuit board assembly of the electronic device of FIG. 3; the circuit board assembly comprises a mainboard, a first circuit board, a second circuit board and an antenna device;

FIG. 6 is a schematic plan view of an antenna assembly of the circuit board assembly of FIG. 5; the antenna device comprises a functional antenna and an NFC antenna, wherein the functional antenna comprises a functional chip and a functional radiator, and the NFC antenna comprises an NFC chip;

FIG. 7 is another schematic plan view of the antenna assembly of the circuit board assembly of FIG. 5; the antenna device comprises a functional antenna and an NFC antenna, wherein the functional antenna comprises a functional chip and a functional radiator, and the NFC antenna comprises an NFC chip and an NFC radiator;

fig. 8 is a schematic plan view of the NFC radiator of the antenna device shown in fig. 7 including a first NFC radiating element and a second NFC radiating element;

fig. 9 is a schematic plan view of the antenna device shown in fig. 8 further including a first conductive trace, a second conductive trace and a third conductive trace;

fig. 10 is a schematic plan view of the antenna device shown in fig. 9 further including a SAR sensor, wherein the SAR sensor includes a SAR sensing chip;

fig. 11 is another schematic plan view of the antenna device shown in fig. 9 further including a SAR sensor, wherein the SAR sensor includes a SAR sensing chip and a SAR radiator;

fig. 12 is a plan view of the antenna device of fig. 11 including a functional chip and a plurality of functional radiators;

fig. 13 is a plan view of the antenna device of fig. 11 including a plurality of functional chips and a plurality of functional radiators;

fig. 14 is a plan view of the antenna assembly of fig. 13 further including a first feed and a second feed;

fig. 15 is a plan view of the antenna assembly of fig. 13 further including a third feed and a fourth feed;

fig. 16 is a schematic plan view of the antenna device shown in fig. 14 further including a first electrical connection unit;

fig. 17 is a plan view of the first electrical connection unit of the antenna device of fig. 16 including at least one inductor;

fig. 18 is a plan view of the antenna device shown in fig. 17 further including a second electrical connection unit;

fig. 19 is a schematic plan view of the second electrical connection unit of the antenna arrangement of fig. 18 comprising at least one first capacitor;

fig. 20 is a plan view of the antenna device shown in fig. 19 further including a third electrical connection unit;

fig. 21 is a schematic plan view of a second electrical connection unit of the antenna arrangement of fig. 20 comprising at least one second capacitor;

fig. 22 is a schematic plan view illustrating a feeding terminal of the first functional radiator, a ground terminal of the first functional radiator, an electrical connection terminal of the second functional radiator, a ground terminal of the second functional radiator, and a feeding terminal of the second functional radiator of the antenna apparatus shown in fig. 20, which are sequentially arranged;

fig. 23 is a plan view of the antenna device shown in fig. 22 further including a first matching circuit and a second matching circuit;

fig. 24 is a schematic plan view of an electronic device corresponding to the antenna device shown in fig. 23.

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 inventive step, are within the scope of the present disclosure.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, an assembly or device that includes one or more components is not limited to one or more components listed, but may alternatively include one or more components not listed but inherent to the illustrated product or to which it should be entitled based on the described functionality.

As shown in fig. 1, fig. 1 is a schematic structural diagram of an electronic device 100 according to an embodiment of the present disclosure. The electronic device 100 provided by the present application may be a mobile phone, a tablet computer, a watch, a bracelet, glasses, a sound box, a refrigerator, a camera, a Customer Premise Equipment (CPE), and the like. The electronic device 100 includes a housing 2 and a circuit board assembly 1 disposed within the housing 2.

In the embodiment of the present application, the electronic device 100 is a mobile phone as an example. Referring to fig. 1 and 2, the housing 2 includes a middle frame 21 and a back plate 22. The material of the middle frame 21 may be one of metal, alloy, carbon fiber, plastic, composite material, etc. The material of the back plate 22 may be one of metal, alloy, carbon fiber, plastic, glass, ceramic, etc. The middle frame 21 and the back plate 22 may be integrally formed or connected together.

The electronic device 100 further includes a display screen 3, a camera module 4, and a battery 5. The Display screen 3 may be one of a Liquid Crystal Display (LCD) 3, a Cathode Ray Tube (CRT) Display screen 3, a Light Emitting Diode (LED) Display screen 3, an Organic Light Emitting Diode (LED) Display screen 3, and the like. The display screen 3 is arranged opposite to the back plate 22 and is connected to one side of the middle frame 21, which faces away from the back plate 22. An accommodating space 23 is formed among the display screen 3, the middle frame 21 and the back plate 22. The camera module 4 may include one or more cameras. The camera includes an optical lens and an image sensor. The optical lens may be one of a standard lens, a wide-angle lens, a telephoto lens, a macro lens, and the like. The image sensor may be one of a CCD image sensor, a CMOS image sensor, and the like. The camera module 4 is used for shooting images. The battery 5 may be one of a lithium battery 5, a nickel-hydrogen battery 5, a nickel-chromium battery 5, and the like. The battery 5 is used for supplying power to the display screen 3, the camera module 4 and the circuit board assembly 1. The circuit board assembly 1, the camera module 4 and the battery 5 are all disposed in the accommodating space 23.

Referring to fig. 3 and fig. 4, fig. 4 is a schematic plan view of a circuit board assembly 1 according to an embodiment of the present disclosure. The circuit board assembly 1 includes a first circuit board 11, a second circuit board 12 and an antenna device 10. The antenna device 10 includes a functional antenna 101 and an NFC antenna 102. The functional antenna 101 includes a functional chip 110 and a functional radiator 112. The NFC antenna 102 includes an NFC chip 120 and an NFC radiator 121.

The first circuit board 11 may be one of a single-sided board, a double-sided board, a multi-layered board, and the like. The substrate of the first circuit board 11 may be a hard substrate or a flexible substrate. For example: the first Circuit Board 11 may be a Printed Circuit Board (PCB) or a Flexible Printed Circuit Board (FPC). The functional radiator 112 is disposed on the first circuit board 11. The second circuit board 12 may be one of a single-sided board, a double-sided board, a multi-layered board, or the like. The substrate of the second circuit board 12 may be a hard substrate or a flexible substrate. For example: the second Circuit Board 12 may be a Printed Circuit Board (PCB) or a Flexible Printed Circuit (FPC). The NFC radiator 121 is disposed on the second circuit board 12.

In an embodiment, referring to fig. 2 and fig. 4, the first circuit board 11 is a main board of the electronic device 100. The functional chip 110, the functional radiator 112, and the NFC chip 120 are disposed on the first circuit board 11 at intervals. Optionally, the functional chip 110, the functional radiator 112 and the NFC chip 120 are all disposed on a side of the first circuit board 11 facing the backplane 22. Wherein the functional radiator 112 is disposed near the top of the middle frame 21. The functional radiator 112 may transmit and receive signals through the side of the middle frame 21 and/or the rear plate 22. If the middle frame 21 and the back plate 22 are made of conductive materials such as metal and alloy, insulating materials can be filled in the relative positions of the middle frame 21 and the back plate 22 to facilitate signal transmission; if the middle frame 21 and the back plate 22 are made of an insulating material such as glass or plastic, the functional radiator 112 may be attached to the inner surface of the middle frame 21 and/or the inner surface of the back plate 22. In this embodiment, the functional radiator 112 is disposed near the top of the middle frame 21, and the functional radiator 112 faces the base station and the satellite in most application scenarios and is shielded less, so that the communication performance between the functional radiator 112 and the base station and the satellite can be improved. Of course, in other embodiments, the functional chip 110, the functional radiator 112 and the NFC chip 120 may be disposed on a side of the first circuit board 11 facing the display screen 3 to transmit and receive signals through the side of the display screen 3.

The second circuit board 12 is spaced apart from the first circuit board 11. Alternatively, the second circuit board 12 and the first circuit board 11 may be disposed opposite to each other in the thickness direction of the electronic apparatus 100. The thickness direction of the electronic device 100 can refer to the Z-axis direction in the drawings. In one embodiment, the second circuit board 12 is disposed between the first circuit board 11 and the back plate 22. The NFC radiator 121 is disposed on the second circuit board 12. The NFC radiator 121 may transmit and receive signals through the side of the back plate 22. If the back plate 22 is made of conductive materials such as metal and alloy, insulating materials may be filled in the corresponding positions of the back plate 22 to facilitate signal transmission; if the backplate 22 is made of an insulating material such as glass or plastic, the NFC radiator 121 may be attached to the inner surface of the backplate 22. Of course, in other embodiments, the second circuit board 12 may be disposed between the first circuit board 11 and the display screen 3, and at this time, the NFC radiator 121 may transmit and receive signals through the side of the display screen 3.

In another embodiment, referring to fig. 2 and 5, the circuit board assembly 1 further includes a main board 13. The functional chip 110 and the NFC chip 120 are both disposed on the motherboard 13. The first circuit board 11 is disposed between the main board 13 and the back board 22. In one embodiment, the first circuit board 11 is disposed near the top of the middle frame 21. The functional radiator 112 is disposed on the first circuit board 11, and the functional radiator 112 can transmit and receive signals through the side of the middle frame 21 and/or the side of the back plate 22. In the present embodiment, the first circuit board 11 is close to the top of the middle frame 21, the functional radiator 112 is disposed on the first circuit board 11, and the functional radiator 112 faces the base station and the satellite in most application scenarios and has less shielding, so that the communication performance between the functional radiator 112 and the base station and the satellite can be improved.

The second circuit board 12 is spaced apart from the first circuit board 11. In one embodiment, the second circuit board 12 is disposed between the main board 13 and the back board 22. Alternatively, the second circuit board 12 and the first circuit board 11 are arranged along the length direction of the electronic device 100. The length direction of the electronic device 100 can refer to the X-axis direction in the drawings. The NFC radiator 121 is disposed on the second circuit board 12. The NFC radiator 121 may transmit and receive signals through the side of the back plate 22. Of course, in other embodiments, the second circuit board 12 may be disposed between the motherboard 13 and the display screen 3, and at this time, the NFC radiator 121 may transmit and receive signals through the side of the display screen 3.

By providing the functional radiator 112 on the first circuit board 11 and the NFC radiator 121 on the second circuit board 12, the antenna device 10 is advantageously accommodated in the accommodating space 23 as a whole, and the antenna device 10 is advantageously applied to the electronic device 100 in which the housing 2 is a non-conductive housing. The circuit board assembly 1 and the electronic device 100 provided by the present application have better NFC performance because they include the antenna device 10 described below.

As shown in fig. 6, fig. 6 is a schematic plan view of an antenna device 10 according to an embodiment of the present application. The antenna device 10 includes a functional antenna 101 and an NFC antenna 102. The functional antenna 101 includes at least one functional chip 110 and at least one functional radiator 112. The NFC antenna 102 includes an NFC chip 120.

The functional chip 110 may be one or more of a chip of a GPS antenna, a chip of a WIFI antenna, a chip of a 3G mobile communication antenna, a chip of a 4G mobile communication antenna, a chip of a 5G mobile communication antenna, and the like.

The number of functional radiators 112 may be one, two, three, or the like. The shape of the functional radiator 112 may be one of an L shape, an F shape, a V shape, a rectangle, a square shape, a circle, a bar shape, other shapes, and the like. The number and shape of the functional radiators 112 are not particularly limited in the present application. The functional radiator 112 may be one or more of a radiator of a GPS antenna, a radiator of a WIFI antenna, a radiator of a 3G mobile communication antenna, a radiator of a 4G mobile communication antenna, a radiator of a 5G mobile communication antenna, and the like. The functional radiator 112 corresponds to the functional chip 110.

In one embodiment, the number of functional radiators 112 is one. The functional radiator 112 integrates a radiator of a GPS L1 antenna and a radiator of a WIFI 5G antenna; or, the functional radiator 112 integrates a radiator of a medium-high frequency band (1710MHz to 2690MHz) antenna and a radiator of an N78 frequency band (3300MHz to 3800MHz) antenna; alternatively, the functional radiator 112 is one of a radiator of a GPS L1 antenna, a radiator of a WIFI 5G antenna, a radiator of a low frequency band (617MHZ to 960MHZ) antenna, a radiator of a medium and high frequency band antenna, a radiator of an N78 band antenna, and the like. It is understood that the functional radiator 112 can transmit and receive corresponding target antenna signals under the excitation of the functional chip 110. For example: when the functional radiator 112 is a radiator of the GPS L1 antenna, the functional radiator 112 can transmit and receive antenna signals in the 1575.42 ± 1.023MHz band under the excitation of the functional chip 110.

In another embodiment, the number of the functional radiators 112 is plural. For example, the number of functional radiators 112 is two, three, or more. The plurality of functional radiators 112 include a plurality of radiators of a GPS L1 antenna, a WIFI 5G antenna, a MH Band antenna, a N78 antenna, an LB Band antenna, and the like.

The functional chip 110 is electrically connected to the functional radiator 112, and is configured to receive and transmit a target antenna signal under excitation of the functional chip 110. In this application, unless otherwise specified, "electrically coupled" may include one or more of a direct electrical connection, an indirect electrical connection, and a coupling, and "electrically connected" may be a direct electrical connection or an indirect electrical connection, and will not be described in detail later. It is understood that the functional chip 110 can excite the functional radiator 112 to generate rf current, so that the functional radiator 112 can transmit and receive the target antenna signal. The target antenna signal, i.e., the electromagnetic wave signal, may be one or more of a GPS signal, a WIFI signal, a 2G mobile communication signal, a 3G mobile communication signal, a 4G mobile communication signal, a 5G mobile communication signal, and the like.

As shown in fig. 7, fig. 7 is another schematic plan view of the antenna device 10 according to the embodiment of the present application. The NFC antenna 102 is disposed apart from the functional antenna 101. In this embodiment, the functional chip 110, the functional radiator 112, the NFC chip 120, and the NFC radiator 121 are disposed at intervals. The NFC radiator 121 may have one of an L-shape, an F-shape, a V-shape, a rectangular shape, a square shape, a circular shape, other irregular shapes, and the like. The shape of the NFC radiator 121 is not specifically limited in the present application.

In one embodiment, as shown in fig. 8, the NFC radiator 121 includes a first NFC radiation part 121a and a second NFC radiation part 121b connected to each other. The first NFC radiation section 121a extends in the first direction. The second NFC radiation section 121b extends in the second direction. The first direction intersects the second direction. The angle between the first direction and the second direction may be one of 15 °, 20 °, 36 °, 50 °, 80 °, 90 °, etc. In the embodiment of the present application, the first direction is perpendicular to the second direction. Alternatively, the first direction may be a length direction of the antenna device 10, and the second direction may be a width direction of the antenna device 10; alternatively, the first direction may be a width direction of the antenna device 10, and the second direction may be a length direction of the antenna device 10. Here, the width direction of the antenna device 10 may refer to the Y-axis direction in the drawing. The length, width, and thickness directions of the antenna device 10 correspond to those of the electronic apparatus 100 (see fig. 2), respectively. In the embodiment of the present application, the first direction is taken as the length direction of the antenna device 10, and the second direction is taken as the width direction of the antenna device 10. The first NFC radiating portion 121a and the second NFC radiating portion 121b form an L-shaped NFC radiator 121. In this embodiment, the NFC radiator 121 has a simple structure and is easy to process.

The NFC chip 120 includes a first electrode terminal and a second electrode terminal. The first electrode terminal may be a positive electrode terminal, and the second electrode terminal may be a negative electrode terminal; alternatively, the first electrode terminal may be a negative electrode terminal, and the second electrode terminal may be a positive electrode terminal. The first electrode terminal, the functional radiator 112, the NFC radiator 121, and the second electrode terminal are electrically connected in sequence to form a series circuit.

The first electrode terminal and the functional radiator 112 may be electrically connected through one or more of a conductive trace, a feed element, a matching circuit, and the like. The functional radiator 112 and the NFC radiator 121 may be electrically connected by one or more of a conductive trace, a feed, a matching circuit, and the like. The NFC radiator 121 and the second electrode terminal may be electrically connected by one or more of a conductive trace, a feed, a matching circuit, and the like.

In one embodiment, as shown in fig. 9, the antenna device 10 further includes a first conductive trace 130, a second conductive trace 131, and a third conductive trace 132. The first conductive trace 130, the second conductive trace 131 and the third conductive trace 132 may be disposed on the main board 13 (see fig. 5). One end of the first conductive trace 130 is electrically connected to the first electrode end of the NFC chip 120, and the other end of the first conductive trace 130 is electrically connected to the functional radiator 112. One end of the second conductive trace 131 is electrically connected to the functional radiator 112, and the other end of the second conductive trace 131 is electrically connected to the NFC radiator 121. One end of the third conductive trace 132 is electrically connected to the NFC radiator 121, and the other end of the third conductive trace 132 is electrically connected to the second electrode of the NFC chip 120.

The NFC chip 120 is configured to excite the functional radiator 112 and the NFC radiator 121 to transmit and receive an NFC signal. In other words, the NFC chip 120 can excite the functional radiator 112 and the NFC radiator 121 to generate an NFC current, so that the functional radiator 112 and the NFC radiator 121 transceive an NFC signal. As can be understood, in the antenna device 10 provided in the present application, the functional radiator 112 and the NFC radiator 121 may both receive and transmit NFC signals under the excitation of the NFC chip 120, which can enhance the NFC function of the antenna device 10 and improve the user experience. The functional radiator 112 can transmit and receive a target antenna signal by being excited by the functional chip 110, that is, the functional antenna 101 and the NFC antenna 102 share the functional radiator 112.

According to the antenna device 10 provided by the application, the NFC chip 120, the function radiator 112 and the NFC radiator 121 are connected in series, so that the NFC chip 120 can excite the NFC radiator 121 to transmit and receive NFC signals and can also excite the function radiator 112 to transmit and receive NFC signals, and therefore reliability and efficiency of NFC of the antenna device 10 are improved while the function radiator 112 is not influenced to transmit and receive target antenna signals, and user experience is improved.

Further, as shown in fig. 10, the antenna device 10 further includes a SAR inductor 104. The SAR sensor 104 is an electromagnetic wave absorption ratio detector. The SAR sensor 104 includes a SAR sensing chip 140. The SAR sensing chip 140 is electrically connected to the functional radiator 112, and is configured to detect a capacitance of the functional radiator 112 to adjust a power of the functional radiator 112.

In an application scenario, the SAR sensing chip 140 is configured to detect a capacitance value of the functional radiator 112, and send a SAR sensing signal to the functional radiator 112 when the capacitance value of the functional radiator 112 is greater than a preset threshold value, so as to reduce the power of the functional radiator 112.

In another application scenario, the SAR sensing chip 140 is configured to detect a capacitance variation of the functional radiator 112, and send an SAR sensing signal to the functional radiator 112 when the capacitance variation of the functional radiator 112 is detected to be greater than a preset variation, so as to reduce the power of the functional radiator 112.

In one embodiment, as shown in fig. 10, the antenna device 10 further includes a fourth conductive trace 133. The fourth conductive trace 133 may be disposed on the main board 13 (see fig. 5). One end of the fourth conductive trace 133 is electrically connected to the SAR sensing chip 140, and the other end of the fourth conductive trace 133 is electrically connected to the functional radiator 112.

By providing the SAR inductor 104, the power of the functional radiator 112 can be adjusted by detecting the capacitance of the functional radiator 112, so that when a human body approaches the functional radiator 112, the electromagnetic radiation of the functional radiator 112 to the human body can be reduced by reducing the power of the functional radiator 112. It is understood that in the present embodiment, the functional antenna 101, the NFC antenna 102 and the SAR sensor 104 all share the functional radiator 112, and the functional radiator 112 can receive and transmit the target antenna signal under the excitation of the functional chip 110, and can receive and transmit the NFC signal under the excitation of the NFC chip 120 and can serve as the sensing element of the SAR sensor 104.

In the antenna device 10 provided by the present application, since the functional chip 110, the NFC chip 120, and the SAR sensing chip 140 are all electrically connected to the functional radiator 112, the functional chip 110 can excite the functional radiator 112 to transmit and receive a target antenna signal, the NFC chip 120 can excite the functional radiator 112 to transmit and receive an NFC signal, and the SAR sensor 104 can detect the capacitance of the functional radiator 112 to adjust the power of the functional radiator 112, that is, the functional chip 110, the NFC chip 120, and the SAR sensing chip 140 share the same radiator, so that the number of components of the antenna device 10 can be reduced, and the structure of the antenna device 10 can be simplified. The circuit board assembly 1 and the electronic device 100 provided by the present application include the antenna device 10, so that the structure is simple and the layout difficulty is reduced.

In one embodiment, as shown in fig. 11, the SAR inductor 104 further includes a SAR inductive radiator 141. The SAR inductive radiator 141 is electrically connected to the SAR inductive chip 140. SAR sense chip 140 is also used to detect the capacitance of SAR sense radiator 141 to regulate the power of functional radiator 112. The SAR inductive radiator 141 may be disposed on the first circuit board 11 (see fig. 4 or fig. 5), and is disposed at an interval from the functional radiator 112 and the NFC radiator 121, so as to reduce coupling interference between the three radiators. In this embodiment, the SAR sensing chip 140 determines whether a human body approaches by simultaneously detecting the capacitance of the SAR sensing radiator 141 and the capacitance of the functional radiator 112, so as to further improve the sensing accuracy of the SAR sensor 104 and reduce the probability of detection errors, thereby being more beneficial to adjusting the power of the functional radiator 112 according to different scenes, and improving the detection efficiency of the functional radiator 112 while reducing the radiation to the human body.

Optionally, the at least one functional radiator 112 includes a first functional radiator 1120 and a second functional radiator 1121 that are electrically connected. In one embodiment, as shown in fig. 12, the number of functional chips 110 is one. The functional chip 110 is electrically connected to the first functional radiator 1120, and is configured to excite the first functional radiator 1120 to receive and transmit a target antenna signal, and the functional chip 110 is also electrically connected to the second functional radiator 1121, and is configured to excite the second functional radiator 1121 to receive and transmit a target antenna signal. In another embodiment, as shown in fig. 13, the number of the functional chips 110 is plural. One or more functional chips 110 are electrically connected to the first functional radiator 1120 and are configured to excite the first functional radiator 1120 to transmit and receive a target antenna signal, and another one or more functional chips 110 are electrically connected to the second functional radiator 1121 and are configured to excite the second functional radiator 1121 to transmit and receive a target antenna signal.

The first function radiator 1120 may be one or more of a radiator of a GPS antenna, a radiator of a WIFI antenna, a radiator of a 2G mobile communication antenna, a radiator of a 3G mobile communication antenna, a radiator of a 4G mobile communication antenna, a radiator of a 5G mobile communication antenna, and the like. The second function radiator 1121 may be one or more of a radiator of a GPS antenna, a radiator of a WIFI antenna, a radiator of a 2G mobile communication antenna, a radiator of a 3G mobile communication antenna, a radiator of a 4G mobile communication antenna, a radiator of a 5G mobile communication antenna, and the like. When the first functional radiator 1120 is used for transceiving a target antenna signal, the operating frequency of the first functional radiator 1120 may include one or more of 617MHZ to 960MHZ, 1710MHZ to 2690MHZ, 3300MHZ to 3800MHZ, WIFI 5G, WIFI 2.4.4G, GPS L1, GPS L5, and the like. When the first functional radiator 1120 is used to transmit and receive NFC signals, the operating frequency of the first functional radiator 1120 may include 12MHz to 15 MHz. When the second functional radiator 1121 is used for transceiving a target antenna signal, the operating frequency of the second functional radiator 1121 may include one or more of 617MHZ to 960MHZ, 1710MHZ to 2690MHZ, 3300MHZ to 3800MHZ, WIFI 5G, WIFI 2.4.4G, GPS L1, GPS L5, and the like. When the second functional radiator 1121 is used to transceive an NFC signal, the operating frequency of the second functional radiator 1121 may include 12MHz to 15 MHz. It can be understood that the operating frequency of the first functional radiator 1120 when transceiving the NFC signal is less than the operating frequency of the first functional radiator 1120 when transceiving the target antenna signal. The operating frequency of the second functional radiator 1121 when the NFC signal is received and transmitted is less than the operating frequency of the second functional radiator 1121 when the target antenna signal is received and transmitted.

In one embodiment, the first functional radiator 1120 integrates a radiator of a GPS L1 antenna and a radiator of an N78 band antenna. The second functional radiator 1121 integrates a radiator of a WIFI 5G antenna and a radiator of an MH Band antenna. It is understood that the at least one functional chip 110 may excite the first functional radiator 1120, so that the first functional radiator 1120 generates a corresponding first radio frequency current to transceive antenna signals of the GPS L1 and the N78 frequency bands. The at least one functional chip 110 may excite the second functional radiator 1121, so that the second functional radiator 1121 generates a corresponding second radio frequency current to transceive antenna signals in WIFI 5G and MH Band frequency bands.

The first electrode terminal of the NFC chip 120, the first function radiator 1120, the second function radiator 1121, the NFC radiator 121, and the second electrode terminal of the NFC chip 120 are electrically connected in sequence to form a series circuit. It is understood that the first functional radiator 1120 and the second functional radiator 1121 are both electrically connected to the NFC chip 120, that is, the first functional radiator 1120 and the second functional radiator 1121 are both capable of transceiving NFC signals under excitation of the NFC chip 120. In this embodiment, by providing the plurality of functional radiators 112 and connecting the plurality of functional radiators 112 with the NFC radiator 121 and the NFC chip 120 in series, the inductive strength of the antenna device 10 can be further increased, and the NFC performance of the antenna device 10 can be improved. Furthermore, since the function radiator 112 is disposed apart from the NFC radiator 121, the NFC function can be used at different positions, so as to be used for using the NFC function in different holding states, for example: the side of the electronic device 100 where the back plate 22 is located and the side of the middle frame 21 are both capable of implementing the NFC function, or different areas of the side of the back plate 22 are both capable of implementing the NFC function.

In one embodiment, as shown in fig. 14, the feeding terminal 112a of the first functional radiator 1120 electrically couples the first electrode terminal of the NFC chip 120 and the functional chip 110. The feeding end 112b of the second functional radiator 1121 electrically couples the SAR induction chip 140, the functional chip 110, and the NFC radiator 121.

Optionally, the functional antenna 101 further includes a first feed 113 and a second feed 114. The first feeding member 113 may be a microstrip line, a feeding spring, a metal spring pin, or the like. One end of the first feeding member 113 is electrically connected to the feeding end 112a of the first functional radiator 1120, the other end of the first feeding member 113 is electrically connected to the first electrode end of the NFC chip 120 through the first conductive trace 130, and the other end of the first feeding member 113 is further electrically connected to the functional chip 110, which may be directly electrically connected, indirectly electrically connected, or coupled. The second feeding element 114 may be a microstrip line, a feeding spring, a metal spring pin, etc. One end of the second feed 114 is electrically connected to the feeding end 112b of the second functional radiator 1121, the other end of the second feed 114 is electrically connected to the NFC radiator 121 through the second conductive trace 131, the other end of the second feed 114 is further electrically connected to the functional chip 110, which may be directly electrically connected, indirectly electrically connected, or coupled, and the other end of the second feed 114 is further electrically connected to the SAR sensing chip 140, which may be directly electrically connected, indirectly electrically connected, or coupled.

In another embodiment, as shown in fig. 15, the feeding terminal 112a of the first functional radiator 1120 electrically connects the first electrode terminal of the NFC chip 120, the SAR sensing chip 140 and the functional chip 110, and the feeding terminal 112b of the second functional radiator 1121 electrically connects the functional chip 110 and the NFC radiator 121.

Optionally, the functional antenna 101 further includes a third feed 115 and a fourth feed 116. The third feeding member 115 may be a microstrip line, a feeding spring, a metal spring pin, or the like. One end of the third feed 115 is electrically connected to the feeding end 112a of the first functional radiator 1120, the other end of the third feed 115 is electrically connected to the first electrode end of the NFC chip 120 through the first conductive trace 130, the other end of the third feed 115 is further electrically connected to the functional chip 110, which may be directly electrically connected, indirectly electrically connected, or coupled, and the other end of the third feed 115 is further electrically connected to the SAR sensing chip 140, which may be directly electrically connected, indirectly electrically connected, or coupled. The fourth feeding element 116 may be a microstrip line, a feeding spring, a metal spring pin, etc. One end of the fourth feed 116 is electrically connected to the feed end 112b of the second functional radiator 1121, the other end of the fourth feed 116 is electrically connected to the NFC radiator 121 through the second conductive trace 131, and the other end of the fourth feed 116 is further electrically connected to the functional chip 110, which may be directly electrically connected, indirectly electrically connected, or coupled.

Optionally, as shown in fig. 16, the antenna device 10 further includes a first electrical connection unit 105. The first electrical connection unit 105 may include an inductor 151 and/or a control switch. The first electrical connection unit 105 is electrically connected between the electrical connection end 112c of the first functional radiator 1120 and the electrical connection end 112d of the second functional radiator 1121. The first electrical connection unit 105 is configured to enable the first functional radiator 1120 and the second functional radiator 1121 to be in a conducting state when the NFC chip 120 and/or the SAR sensing chip 140 is in the operating mode, and to enable the first functional radiator 1120 and the second functional radiator 1121 to be in a disconnecting state when the functional chip 110 is in the operating mode. In other words, the first electrical connection unit 105 is used for passing the NFC current generated by the excitation of the NFC chip 120 and the SAR induced current generated by the excitation of the SAR induced chip 140, and for blocking the radio frequency current generated by the excitation of the functional chip 110.

The first electrical connection unit 105 electrically connects the electrical connection terminal 112c of the first functional radiator 1120 and the electrical connection terminal 112d of the second functional radiator 1121, so that the first functional radiator 1120 and the second functional radiator 1121 are switched between on and off, when the NFC chip 120 and/or the SAR sensing chip 140 are in an operating mode, the first functional radiator 1120 and the second functional radiator 1121 are switched on, and the NFC current and/or the SAR induced current pass through, so as to implement a corresponding NFC and/or SAR sensing function. In addition, when the functional chip 110 is in the operating mode, that is, when the first functional radiator 1120 and the second functional radiator 1121 are used for transceiving the target antenna signal, the first functional radiator 1120 and the second functional radiator 1121 are in the off state, the radio frequency current generated by the excitation of the functional chip 110 is blocked from communicating between the first functional radiator 1120 and the second functional radiator 1121, and the first functional radiator 1120 and the second functional radiator 1121 can be isolated from each other, so as to reduce the coupling interference between the first functional radiator 1120 and the second functional radiator 1121.

Optionally, referring to fig. 16 and 17, the first electrical connection unit 105 includes at least one inductor 151. The inductor 151 electrically connects the electrical connection terminal 112c of the first functional radiator 1120 and the electrical connection terminal 112d of the second functional radiator 1121, so that the first functional radiator 1120 and the second functional radiator 1121 can be switched on and off. Meanwhile, the design of the controller and the control program for controlling the on and off of the first functional radiator 1120 and the second functional radiator 1121 may be reduced, thereby simplifying the structure of the antenna apparatus 10 in both hardware and software.

Further, as shown in fig. 18, the antenna device 10 further includes a second electrical connection unit 106. The second electrical connection unit 106 is electrically connected between the ground terminal 112e of the first functional radiator 1120 and the reference ground. The second electrical connection unit 106 is configured to enable the ground terminal 112e of the first functional radiator 1120 and the reference to be in an off state when the NFC chip 120 and/or the SAR sensing chip 140 are in the operating mode, and to enable the ground terminal 112e of the first functional radiator 1120 and the reference to be in an on state when the functional chip 110 is in the operating mode. The second electrical connection unit 106 may include a capacitor and/or a control switch. In other words, the second electrical connection unit 106 is used for blocking the NFC current generated by the excitation of the NFC chip 120 and/or the SAR induced current generated by the excitation of the SAR induced chip 140, and for blocking the radio frequency current generated by the excitation of the functional chip 110.

The second electrical connection unit 106 is electrically connected between the ground terminal 112e of the first functional radiator 1120 and the reference ground, so that the ground terminal 112e of the first functional radiator 1120 and the reference ground can be switched on and off, and when the NFC chip 120 or the SAR sensing chip 140 is in the operating mode, the ground terminal 112e of the first functional radiator 1120 and the reference ground can be disconnected, so as to prevent the current on the first functional radiator 1120 from being transmitted to the reference ground through the ground terminal 112e of the first functional radiator 1120 and failing to be connected in series with the NFC chip 120, which affects the performance of the first functional radiator 1120 in receiving and transmitting NFC signals. In addition, when the functional chip 110 is in the operating mode, that is, when the first functional radiator 1120 is used for receiving and transmitting the target antenna signal, the ground terminal 112e of the first functional radiator 1120 is connected to the reference ground, so that the electrostatic interference of the first functional radiator 1120 can be reduced, and the performance of the first functional radiator 1120 for receiving and transmitting the target antenna signal can be ensured.

Optionally, referring to fig. 18 and 19, the second electrical connection unit 106 includes at least one first capacitor 161. The ground terminal 112e of the first functional radiator 1120 and the reference ground are electrically connected through the first capacitor 161, so that the ground terminal 112e of the first functional radiator 1120 and the reference ground can be switched on and off. Meanwhile, the design of a controller and a control program for controlling the connection and disconnection between the ground terminal 112f of the second functional radiator 1121 and the reference ground may be reduced, thereby simplifying the structure of the antenna apparatus 10 in both hardware and software.

Further, as shown in fig. 20, the antenna device 10 further includes a third electrical connection unit 107. The third electrical connection unit 107 is electrically connected between the ground terminal 112f of the second functional radiator 1121 and the reference ground, and the third electrical connection unit 107 is configured to disconnect the ground terminal 112f of the second functional radiator 1121 and the reference ground when the NFC chip 120 and/or the SAR sensing chip 140 is in the operating mode, and to connect the ground terminal 112f of the second functional radiator 1121 and the reference ground when the functional chip 110 is in the operating mode. In other words, the third electrical connection unit 107 is used for blocking the NFC current generated by the excitation of the NFC chip 120 and/or the SAR induced current generated by the excitation of the SAR induced chip 140, and for blocking the radio frequency current generated by the excitation of the functional chip 110.

The third electrical connection unit 107 electrically connects the ground terminal 112f of the second functional radiator 1121 with the reference ground, so that the ground terminal 112f of the second functional radiator 1121 is switched between on and off states, and when the NFC chip 120 or the SAR sensing chip 140 is in the operating mode, the ground terminal 112f of the second functional radiator 1121 is switched off from the reference ground, so as to prevent the current on the second functional radiator 1121 from being transmitted to the reference ground through the ground terminal 112f of the second functional radiator 1121, failing to be connected in series with the NFC chip 120, and affecting the performance of the second functional radiator 1121 in transceiving NFC signals. In addition, when the functional chip 110 is in the operating mode, that is, when the second functional radiator 1121 is used for transceiving the target antenna signal, the ground terminal 112f of the second functional radiator 1121 is conducted to the reference ground, so that the electrostatic interference of the second functional radiator 1121 can be reduced, and the performance of transceiving the target antenna signal by the second functional radiator 1121 is ensured.

Optionally, referring to fig. 20 and 21, the third electrical connection unit 107 includes at least one second capacitor. The ground terminal 112f of the second functional radiator 1121 is electrically connected to the reference ground through the second capacitor, so that the ground terminal 112f of the second functional radiator 1121 can be switched between on and off with respect to the reference ground. Meanwhile, the design of a controller and a control program for controlling the connection and disconnection between the ground terminal 112f of the second functional radiator 1121 and the reference ground may be reduced, thereby simplifying the structure of the antenna apparatus 10 in both hardware and software.

As shown in fig. 22, the feeding end 112a of the first functional radiator 1120, the grounding end 112e of the first functional radiator 1120, the electrical connection end 112c of the first functional radiator 1120, the electrical connection end 112d of the second functional radiator 1121, the grounding end 112f of the second functional radiator 1121, and the feeding end 112b of the second functional radiator 1121 are arranged in sequence. By arranging the feeding end 112a of the first functional radiator 1120, the grounding end 112e of the first functional radiator 1120, the electrical connection end 112c of the first functional radiator 1120, the electrical connection end 112d of the second functional radiator 1121, the grounding end 112f of the second functional radiator 1121, and the feeding end 112b of the second functional radiator 1121 in sequence, the feeding end 112a of the first functional radiator 1120 can be disposed close to the NFC chip 120, the feeding end 112b of the second functional radiator 1121 can be disposed close to the NFC radiator 121, so as to shorten the serial routing among the NFC chip 120, the functional radiators 112, and the NFC radiator 121, and the electrical connection end 112c of the first functional radiator 1120 and the electrical connection end 112d of the second functional radiator 1121 can be brought close to each other, so as to facilitate the electrical connection between the first functional radiator 1120 and the second functional radiator 1121.

Further, referring to fig. 23 and 24, the antenna device 10 further includes a first matching circuit 108 and a second matching circuit 109. The first matching circuit 108 is electrically connected between the feeding end 112a of the first functional radiator 1120 and the first electrode end. The second matching circuit 109 is electrically connected between the feeding end 112b of the second functional radiator 1121 and the NFC radiator 121, and is configured to adjust the operating frequency of the second functional radiator 1121 to the operating frequency of the NFC chip 120 in the operating mode. The first matching circuit 108 may include one or more of an L-shaped matching circuit, a pi-shaped matching circuit, a T-shaped matching circuit, a multi-stage matching circuit, and the like. The second matching circuit 109 may include one or more of an L-shaped matching circuit, a pi-shaped matching circuit, a T-shaped matching circuit, a multi-stage matching circuit, and the like.

By providing the first matching circuit 108 between the feeding end 112a and the first electrode end of the first functional radiator 1120, the operating frequency of the first functional radiator 1120 can be adjusted, so that the first functional radiator 1120 has better NFC performance. By providing the second matching circuit 109 between the feeding terminal 112b of the second functional radiator 1121 and the NFC radiator 121, the operating frequency of the second functional radiator 1121 can be adjusted, so that the second functional radiator 1121 has better NFC performance.

The features mentioned above in the description, the claims and the drawings can be combined with one another in any desired manner, insofar as they are of significance within the scope of the application. The advantages and features described for the antenna device 10 apply in a corresponding manner to the circuit-board assembly 1 and to the electronic device 100.

Although embodiments of the present application have been shown and described, it is understood that the above embodiments are illustrative and not restrictive, and that those skilled in the art may make changes, modifications, substitutions and alterations to the above embodiments without departing from the scope of the present application, and that such changes and modifications are also to be considered as within the scope of the present application.

Claims

1. An antenna device, comprising:

the functional antenna comprises at least one functional chip and at least one functional radiator, wherein the functional chip is electrically connected with the functional radiator and is used for exciting the functional radiator to receive and transmit a target antenna signal;

2. The antenna device of claim 1, wherein the NFC antenna further comprises an NFC radiator, the NFC chip comprises a first electrode terminal and a second electrode terminal, the first electrode terminal, the functional radiator, the NFC radiator, and the second electrode terminal are sequentially electrically connected to form a series loop, and the NFC chip is further configured to excite the NFC radiator to receive and transmit NFC signals.

3. The antenna device according to claim 2, wherein the at least one functional radiator includes a first functional radiator and a second functional radiator that are electrically connected, and the first electrode terminal, the first functional radiator, the second functional radiator, the NFC radiator, and the second electrode terminal are electrically connected in sequence and form a series loop.

4. The antenna device of claim 3, wherein the feed terminal of the first functional radiator electrically couples the first electrode terminal and the functional chip, and the feed terminal of the second functional radiator electrically couples the SAR induction chip, the functional chip, and the NFC radiator; or the feed end of the first functional radiator is electrically connected with the first electrode end, the SAR induction chip and the functional chip, and the feed end of the second functional radiator is electrically connected with the functional chip and the NFC radiator.

5. The antenna device according to claim 4, further comprising a first electrical connection unit electrically connected between an electrical connection terminal of the first functional radiator and an electrical connection terminal of the second functional radiator, wherein the first electrical connection unit is configured to enable the first functional radiator and the second functional radiator to be in a conducting state when the NFC chip and/or the SAR sensing chip are in an operating mode, and to enable the first functional radiator and the second functional radiator to be in a disconnecting state when the functional chip is in the operating mode.

6. The antenna device according to claim 5, further comprising a second electrical connection unit and a third electrical connection unit, wherein the second electrical connection unit is electrically connected between the ground terminal of the first functional radiator and a ground reference, and the second electrical connection unit is configured to disconnect the ground terminal of the first functional radiator and the ground reference when the NFC chip and/or the SAR sensing chip is in the operating mode, and to connect the ground terminal of the first functional radiator and the ground reference when the functional chip is in the operating mode; the third electrical connection unit is electrically connected between the ground terminal of the second functional radiator and the reference ground, and the third electrical connection unit is configured to disconnect the ground terminal of the second functional radiator and the reference ground when the NFC chip and/or the SAR sensing chip are in the operating mode, and to connect the ground terminal of the second functional radiator and the reference ground when the functional chip is in the operating mode.

7. The antenna device according to claim 6, wherein the first electrical connection unit comprises at least one inductor, the second electrical connection unit comprises at least one first capacitor, and the third electrical connection unit comprises at least one second capacitor.

8. The antenna device according to claim 6, wherein the feeding terminal of the first functional radiator, the ground terminal of the first functional radiator, the electrical connection terminal of the second functional radiator, the ground terminal of the second functional radiator, and the feeding terminal of the second functional radiator are arranged in this order.

9. The antenna device according to any one of claims 4 to 8, further comprising a first matching circuit electrically connected between the feeding terminal of the first functional radiator and the first electrode terminal, and a second matching circuit electrically connected between the feeding terminal of the second functional radiator and the NFC radiator.

10. The antenna device according to any of claims 1 to 8, characterized in that the SAR sensor further comprises a SAR inductive radiator electrically coupled to the SAR inductive chip, the SAR inductive chip further configured to detect a capacitance of the SAR inductive radiator to adjust the power of the functional radiator.

11. The antenna device according to any of claims 2 to 8, wherein the NFC radiator comprises a first NFC radiating portion and a second NFC radiating portion connected to each other, the first NFC radiating portion extending in a first direction, the second NFC radiating portion extending in a second direction, and wherein the first direction intersects the second direction.

12. The antenna device according to any of claims 1 to 8, wherein the target antenna signal comprises one or more of a GPS signal, a WIFI signal, a 2G mobile communication signal, a 3G mobile communication signal, a 4G mobile communication signal, a 5G mobile communication signal.

13. A circuit board assembly comprising a circuit board and an antenna device according to any one of claims 1 to 12, wherein the functional radiator is provided on the circuit board.

14. An electronic device comprising a housing and the circuit board assembly of claim 13, wherein the circuit board assembly is disposed within the housing.