WO2023165241A1

WO2023165241A1 - Antenna apparatus, circuit board assembly, and electronic device

Info

Publication number: WO2023165241A1
Application number: PCT/CN2022/142740
Authority: WO
Inventors: 林栢暐; 颜创
Original assignee: Oppo广东移动通信有限公司
Priority date: 2022-03-01
Filing date: 2022-12-28
Publication date: 2023-09-07
Also published as: CN114430104A

Abstract

Provided in the present application are an antenna apparatus, a circuit board assembly, and an electronic device. The antenna apparatus comprises a transmitting module, a radiator and an impedance measurer. The transmitting module is used for transmitting a radio-frequency signal. The radiator is electrically connected to the transmitting module and is used for receiving the radio-frequency signal, which is transmitted by the transmitting module, and performing electromagnetic radiation. One end of the impedance measurer is electrically connected to the radiator, the other end of the impedance measurer is electrically connected to the transmitting module, the impedance measurer is used for measuring an impedance value of the radiator and feeding back the impedance value of the radiator to the transmitting module, and the transmitting module is used for adjusting, according to the impedance value of the radiator, the power for transmitting the radio-frequency signal. The circuit board assembly comprises a circuit board and the antenna apparatus. The electronic device comprises a housing and the circuit board assembly. By means of the antenna apparatus, the circuit board assembly and the electronic device, which are provided in the present application, both the communication quality and an SAR value of a radiator can be taken into consideration.

Description

Antenna assembly, circuit board assembly and electronic equipment

This application claims the priority of the Chinese patent application with the application number 202210198834.2 and the application title "antenna device, circuit board assembly and electronic equipment" submitted to the China Patent Office on March 1, 2022, the entire contents of which are incorporated by reference in In this application.

technical field

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

Background technique

The Specific Absorption Rate (SAR) value can be used to measure the radiation impact of wireless products on the human body. When wireless products are used in different space environments (for example: wireless products are located in the hands of the human body, wireless products are close to the head of the human body, wireless products are placed on desktops, pockets, wireless products have protective shells, etc.) on the radiation impact on the human body Different, if the same SAR value is set, the communication quality of the wireless product will be poor, so how to balance the communication quality of the radiator and the SAR value becomes a technical problem to be solved.

Contents of the invention

The present application provides an antenna device, a circuit board assembly and an electronic device capable of taking into account both the communication quality and the SAR value of the radiator.

In a first aspect, the present application provides an antenna device, which is characterized in that it includes:

The transmitting module is used for transmitting radio frequency signals;

Radiator, electrically connected to the transmitting module, for receiving the radio frequency signal transmitted by the transmitting module and performing electromagnetic radiation;

An impedance detector, one end of the impedance detector is electrically connected to the radiator, the other end of the impedance detector is electrically connected to the transmitting module, the impedance detector is used to detect the impedance value of the radiator, and The impedance value of the radiator is fed back to the transmitting module, and the transmitting module is used for adjusting the power of transmitting radio frequency signals according to the impedance value of the radiator.

In a second aspect, the present application also provides a circuit board assembly, including a circuit board and the antenna device, and the transmitting module and the impedance detector are both arranged on the circuit board.

In a third aspect, the present application also provides an electronic device, including a housing and the circuit board assembly, the circuit board is disposed in the housing, and the radiator is located on the housing.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following will briefly introduce the drawings that are used in the embodiments.

FIG. 1 is a schematic structural diagram of an electronic device provided in an embodiment of the present application;

Fig. 2 is an exploded schematic view of the housing in the electronic device shown in Fig. 1;

3 is a schematic plan view of the electronic device shown in FIG. 1 including a housing and a circuit board assembly;

4 is a schematic plan view of a circuit board assembly of the electronic device shown in FIG. 3 including a circuit board and an antenna device;

5 is a schematic plan view of the antenna device of the electronic device shown in FIG. 4 including a plurality of radiators and a plurality of impedance detectors;

Fig. 6 is a schematic plan view showing that the electronic device shown in Fig. 4 also includes a functional device and a detection device;

FIG. 7 is a schematic circuit diagram of an antenna device provided in an embodiment of the present application;

8 is a schematic circuit diagram of the antenna device shown in FIG. 7 including a power amplifier;

Fig. 9 is a schematic circuit diagram showing that the antenna device shown in Fig. 8 also includes a switch;

FIG. 10 is a schematic circuit diagram of the antenna device shown in FIG. 9 further including a coupler;

11 is a schematic circuit diagram of the coupler of the antenna device shown in FIG. 10 including a first coupled line and a second coupled line;

FIG. 12 is a schematic circuit diagram of the antenna device shown in FIG. 11 further including an impedance tuner;

Fig. 13 is a schematic circuit diagram of the antenna device shown in Fig. 12 also including a receiving module and a low noise amplifier;

FIG. 14 is a schematic circuit diagram of the antenna device shown in FIG. 13 further including a duplexer.

Detailed ways

The present application provides an antenna device, including: a transmitting module, a radiator and an impedance detector. The transmitting module is used for transmitting radio frequency signals. The radiator is electrically connected to the transmitting module, and is used for receiving the radio frequency signal transmitted by the transmitting module and performing electromagnetic radiation. One end of the impedance detector is electrically connected to the radiator, and the other end of the impedance detector is electrically connected to the transmitting module. The impedance detector is used to detect the impedance value of the radiator, and the impedance of the radiator The value is fed back to the transmitting module, and the transmitting module is used to adjust the power of transmitting radio frequency signals according to the impedance value of the radiator.

Wherein, when the impedance value of the radiator increases, the transmitting module reduces the power of the transmitted radio frequency signal; when the impedance value of the radiator decreases, the transmitting module increases the power of the transmitted radio frequency signal.

Wherein, the impedance detector is electrically connected to the radiator through a conductive wire, and the impedance detector is electrically connected to the transmitting module through a conductive wire.

Wherein, the transmitting module includes an electrically connected modulator and a transmitter, and the first end of the impedance detector is electrically connected to the radiator for detecting the power of the radio frequency signal received by the radiator, and the impedance detector The second end of the detector is electrically connected to the transmitter, and is used to detect the power of the radio frequency signal reflected by the radiator, and the impedance detector is used to detect the power of the radio frequency signal received by the radiator and the power of the radio frequency signal reflected by the radiator The power of the radio frequency signal determines the impedance value of the radiator, and the third end of the impedance detector is electrically connected to the modulator for feeding back the impedance value of the radiator to the modulator.

Wherein, the antenna device further includes a switch, one end of the switch is electrically connected to the impedance detector, and the other end of the switch is electrically connected to one of the radiator and the transmitter, the A switch is used to conduct one of the radiator and the emitter with the impedance detector.

Wherein, the connection end of the switch is electrically connected to the first end of the impedance detector and the second end of the impedance detector, and the selection end of the switch is electrically connected to the radiator and the emitter. to switch between the radiator and the emitter.

Wherein, the antenna device further includes a coupler, the first end of the coupler is electrically connected to the transmitter, the second end of the coupler is electrically connected to the radiator, and the first end of the coupler is connected to the radiator. The second end of the coupler is turned on, the radio frequency signal emitted by the transmitter is transmitted between the first end of the coupler and the second end of the coupler, and the third end of the coupler is electrically Connect the second end of the impedance detector, the third end of the coupler is connected to the first end of the coupler, and the fourth end of the coupler is electrically connected to the first end of the impedance detector , the fourth end of the coupler conducts with the second end of the coupler.

Wherein, the coupler includes a first coupled line and a second coupled line oppositely arranged, the first coupled line is coupled to the second coupled line, and the first coupled line is electrically coupled to the coupler Between the first end and the second end of the coupler, the second coupling line is electrically connected between the third end of the coupler and the fourth end of the coupler.

Wherein, the antenna device further includes an impedance tuner, the transmitter, the impedance tuner and the radiator are electrically connected in sequence, the impedance tuner is electrically connected to the impedance detector, and the impedance tuner is used for Impedance matching adjustment is performed according to the impedance value of the radiator before the transmitting module adjusts the power of the transmitted radio frequency signal.

Wherein, the impedance tuner includes an impedance tuning unit and an impedance matching line, the impedance tuning unit is used to obtain the impedance value detected by the impedance detector and adjust the impedance matching line according to the impedance value, so that the The impedance of the output of the impedance tuner matches the impedance of the input of the radiator.

Wherein, the antenna device also includes a power amplifier, one end of the power amplifier is electrically connected to the transmitter, and the other end of the power amplifier is electrically connected to the radiator, and the power amplifier is used to receive the radio frequency emitted by the transmitter. The signal is amplified and transmitted to the radiator.

Wherein, the antenna device further includes a receiving module, one end of the receiving module is electrically connected to the radiator for receiving the radio frequency signal emitted by the radiator, and the other end of the receiving module is electrically connected to the impedance detector The receiving module is further configured to adjust the power of receiving the radio frequency signal emitted by the radiator according to the impedance value of the radiator.

Wherein, the antenna device further includes a duplexer, the first end of the duplexer is electrically connected to the transmitting module, the second end of the duplexer is electrically connected to the radiator, and the duplexer The third end is electrically connected to the receiving module, and the duplexer is used to switch between the transmitting module and the receiving module so that one of the transmitting module and the receiving module is connected to the radiator conduction.

The present application also provides a circuit board assembly, including a circuit board and the antenna device, and the transmitting module and the impedance detector are both arranged on the circuit board.

The present application also provides an electronic device, which includes a casing and the circuit board assembly, the circuit board is arranged in the casing, and the radiator is located on the casing.

Wherein, there are multiple radiators.

Wherein, there are multiple impedance detectors.

Wherein, the housing includes a middle frame, and the plurality of radiators include a first radiator, a second radiator, a third radiator, and a fourth radiator, and the first radiator, the second radiator, The third radiator and the fourth radiator are respectively located on the top frame, the bottom frame, the left frame and the right frame of the middle frame.

Wherein, the electronic device further includes at least one functional device and a detection device, one end of the detection device is electrically connected to the functional device, the other end of the detection device is electrically connected to the transmitting module, and the detection device is used to detect The working state of the functional device and the detected result are fed back to the transmitting module, and the transmitting module is used to adjust the power of the transmitted radio frequency signal according to the impedance value of the radiator and the detection result of the detecting device.

Wherein, the functional device includes one or more of a receiver, a microphone, a face recognition module, a camera module, and a display screen.

The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the embodiments described below are only some of the embodiments included in the technical solutions of the present application, rather than all of the embodiments. Based on the embodiments provided below, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

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

The terms "first", "second" and the like in the description and claims of the present application and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example: an assembly or device that contains one or more parts is not limited to the one or more listed, but optionally also includes one or more parts that are not listed but are inherent in the illustrated product A component, or one or more components it should have based on its stated function.

As shown in FIG. 1 , FIG. 1 is a schematic structural diagram of an electronic device 100 provided in an embodiment of the present application. The electronic device 100 may be a mobile phone, a tablet computer, a computer, a headset, a wearable device (such as a watch, a wristband, etc.) and other devices with wireless communication functions. In this embodiment of the present application, a mobile phone is taken as an example.

As shown in FIG. 2 , the electronic device 100 includes a casing 2 and a circuit board assembly 1 . The shell 2 includes a middle frame 21 and a back plate 22 . The material of the middle frame 21 can be metal, alloy, carbon fiber, ceramics, plastic, glass and so on. The material of the back plate 22 can be metal, alloy, carbon fiber, ceramics, plastic, glass and so on. In the same electronic device 100 , the material of the middle frame 21 and the material of the back plate 22 may be the same or different. For example: the material of the middle frame 21 is metal, alloy and other materials with high strength. The material of the back plate 22 is ceramic, glass and other materials with good aesthetics. The middle frame 21 and the back plate 22 can be integrally formed or connected as one. In one embodiment, the middle frame 21 and the back plate 22 are bonded together as a whole. The casing 2 of the electronic device 100 also includes a display screen 23 . The display screen 23 can be a flexible display screen or a rigid display screen. The display screen 23 can be a liquid crystal display (Liquid Crystal Display, LCD), a cathode ray tube (Cathode Ray Tube, CRT) display screen, a light emitting diode (Light Emitting Diode, LED) display screen, an organic light emitting diode (Organic Light-Emitting Diode , OLED) display and so on. In the embodiment of the present application, unless otherwise specified, the display screen 23 is an OLED display screen as an example. The display screen 23 is connected to a side of the middle frame 21 away from the back panel 22 . The display screen 23 is used for displaying images.

As shown in FIG. 3 , the circuit board assembly 1 includes a circuit board 20 and an antenna device 10 . The circuit board 20 may be the main circuit board of the electronic device 100 , or other auxiliary circuit boards of the electronic device 100 . When divided by the number of layers of the circuit board 20, the circuit board 20 can be a single-sided circuit board, a double-sided circuit board or a multilayer circuit board, etc.; when divided by the characteristics of the circuit board 20, the circuit board 20 can be a rigid circuit board, a flexible Circuit boards, soft and hard boards, etc. In the embodiment of the present application, printed circuit boards (Printed circuit boards, PCB) are taken as an example. Certainly, in other embodiments, the circuit board 20 may also be a flexible circuit board (Flexible Printed Circuit, FPC). The shape of the circuit board 20 can be one of circle, triangle, rectangle, square, other polygons and various irregular shapes (for example: F-shape, L-shape, etc.). In the embodiment of the present application, the rectangular circuit board 20 is taken as an example.

As shown in FIG. 4 , the antenna device 10 includes a transmitting module 101 , a radiator 102 and an impedance detector 103 . The transmitting module 101 is electrically connected to the radiator 102 . The transmitting module 101 is used for transmitting radio frequency signals. The radiator 102 is used to receive the radio frequency signal transmitted by the transmitting module 101 to the radiator 102 and perform electromagnetic radiation. In the present application, the electromagnetic wave signal emitted by the radiator 102 under the excitation of the transmitting module 101 may include one or more of high-frequency signals, medium-high frequency signals, low-frequency signals, and the like. One end of the impedance detector 103 is electrically connected to the radiator 102 , and the other end of the impedance detector 103 is electrically connected to the transmitting module 101 . In this application, "electrical connection" can be used to mean direct electrical connection, indirect electrical connection, electrical coupling, electromagnetic coupling, etc. In the following embodiments, if the electrical connection relationship is not clearly stated, the electrical connection through conductive traces is taken as an example. I won't repeat it in the future. The impedance detector 103 and the transmitting module 101 can be integrated into one body, or can be set independently of each other. The impedance detector 103 is used to detect the impedance value of the radiator 102 and feed back the impedance value of the radiator 102 to the transmitting module 101 . In this application, the impedance value of the radiator 102 includes the impedance value of the radiator 102 itself and the impedance value of the transmission line close to the radiator 102, that is, the impedance value of the transmission line close to the radiator 102 is equivalent to the impedance value of the radiator 102 . The transmission line is the electrical connection line between the transmission module 101 and the radiator 102 (excluding the electrical connection line of the impedance detector 103 ). The impedance value of the radiator 102 changes with the surrounding environment of the radiator 102 . In one embodiment, when a user approaches or touches the radiator 102, the impedance of the radiator 102 increases. It can be understood that whether the environment around the radiator 102 changes can be determined by detecting the impedance value of the radiator 102 . The transmitting module 101 is used for adjusting the power of transmitting radio frequency signals according to the impedance value of the radiator 102 . In an application scenario, when it is determined that the user is close to the radiator 102 according to the impedance value of the radiator 102, the transmitting module 101 can correspondingly reduce the power of the transmitted radio frequency signal, thereby reducing the SAR value; When it is determined that the user is far away from the radiator 102 , the transmitting module 101 can correspondingly increase the power of the transmitted radio frequency signal, thereby improving the communication performance of the antenna device 10 .

Please refer to FIG. 2 and FIG. 4 , the radiator 102 is located in the housing 2 of the electronic device 100 . Both the transmitting module 101 and the impedance detector 103 are disposed on the circuit board 20 . Optionally, the radiator 102 is located on the middle frame 21 ; and/or, the radiator 102 is located on the back plate 22 ; and/or, the radiator 102 is located on the display screen 23 . The electronic device 100 provided in this application may have one or more radiators 102 . In one embodiment, the material of the middle frame 21 is conductive material such as metal, alloy, carbon fiber, etc., and at least part of the middle frame 21 forms the radiator 102 . In other words, one or more radiators 102 are located in the middle frame 21 . In another embodiment, the backplane 22 is made of conductive materials such as metal, alloy, and carbon fiber, and at least part of the backplane 22 forms the radiator 102 . In other words, one or more radiators 102 are located on the backplane 22 . In yet another embodiment, the radiator 102 is located in the display screen 23 . For example, the display screen 23 includes a transparent cover and a display panel arranged in layers, and at least part of the radiator 102 may be located between the transparent cover and the display panel. When the radiator 102 is located on the display screen 23 , the radiator 102 can be located in the non-display area of the display screen 23 , that is, the frame area of the display screen 23 , the hole-digging area, etc., so as to reduce the influence of the radiator 102 on the display screen 23 . Certainly, in other embodiments, the radiators 102 may all be located on the middle frame 21 ; or, the radiators 102 may be all located on the back plate 22 ; or, all the radiators 102 may be located on the display screen 23 . For example: a plurality of radiators 102 can be respectively distributed on the top of the middle frame 21 , the bottom of the middle frame 21 , the right side of the middle frame 21 and the left side of the middle frame 21 . In this embodiment, the radiator 102 is arranged on the housing 2 of the electronic device 100, so that the radiator 102 can be close to the outside of the electronic device 100. When the user approaches or stays away from the radiator 102, the electric field and current of the radiator 102 are greatly affected. , so that the impedance value of the radiator 102 detected by the impedance detector 103 is more accurate.

Please refer to FIG. 4 and FIG. 5 , the electronic device 100 provided by the present application may also have one or more impedance detectors 103 and one or more transmitting modules 101 . When the number of transmitting modules 101 is one, and the number of impedance detectors 103 and the number of radiators 102 are multiple, one impedance detector 103 corresponds to one radiator 102, that is, one impedance detector 103 is electrically connected to one radiator 102 and the transmitting module 101. At this time, each impedance detector 103 is used to detect the impedance value of a corresponding radiator 102 and feed it back to the transmitting module 101 . When the number of transmitting modules 101, the number of impedance detectors 103 and the number of radiators 102 are multiple, one impedance detector 103 corresponds to one radiator 102 and one transmitting module 101, that is, one impedance detector 103 is electrically connected to Between a radiator 102 and a transmitting module 101 . Each impedance detector 103 is used to detect the impedance value of a corresponding radiator 102 and feed back to the corresponding transmitting module 101 . When the electronic device 100 includes a plurality of radiators 102, the plurality of radiators 102 can be distributed in different positions of the electronic device 100, and at this time, a plurality of impedance detectors 103 can be used to detect the radiation of the plurality of radiators 102 in different positions. Impedance value, so as to determine the use scene of the electronic device 100 more accurately. In one embodiment, the plurality of radiators 102 include a first radiator 120 , a second radiator 121 , a third radiator 122 and a fourth radiator 123 . The first radiator 120 is close to the top of the electronic device 100 and may be one of the top of the middle frame 21 , the top of the backplane 22 (refer to FIG. 2 ), and the top of the display screen 23 (refer to FIG. 2 ). The second radiator 121 is close to the bottom of the electronic device 100 , and may be one of the bottom of the middle frame 21 , the bottom of the backplane 22 , and the bottom of the display screen 23 . The third radiator 122 is close to the left side of the electronic device 100 , and may be one of the left side of the middle frame 21 , the left side of the backplane 22 , and the left side of the display screen 23 . The fourth radiator 123 is close to the right side of the electronic device 100 , and may be one of the right side of the middle frame 21 , the right side of the backplane 22 , and the right side of the display screen 23 . The plurality of impedance detectors 103 includes a first impedance detector 130 , a second impedance detector 131 , a third impedance detector 132 and a fourth impedance detector 133 . The first impedance detector 130 is electrically connected between the first radiator 120 and the transmitting module 101 for detecting the impedance value of the first radiator 120 . The second impedance detector 131 is electrically connected between the second radiator 121 and the transmitting module 101 for detecting the impedance value of the second radiator 121 . The third impedance detector 132 is electrically connected between the third radiator 122 and the transmitting module 101 for detecting the impedance value of the third radiator 122 . The fourth impedance detector 133 is electrically connected between the fourth radiator 123 and the transmitting module 101 for detecting the impedance value of the fourth radiator 123 . In the first application scenario, by detecting the impedance value of the first radiator 120, the impedance value of the third radiator 122 and the impedance value of the fourth radiator 123, it can be used to determine whether the electronic device 100 is in a call state (usually The lower electronic device 100 is close to the head), so that when it is determined that the electronic device 100 is in a talking state, the impact of the transmitting module 101 on the first radiator 120, the second radiator 121, the third radiator 122 and the fourth radiator 123 is reduced. The power of the transmitted radio frequency signal, thereby reducing the SAR value. In the second application scenario, by detecting the impedance value of the first radiator 120 and the impedance value of the second radiator 121, it can be used to determine whether the electronic device 100 is held in a landscape orientation, so that when determining that the electronic device 100 is in a landscape orientation When the screen is held, reduce the power of the radio frequency signal transmitted by the transmitting module 101 to the first radiator 120 and the second radiator 121, and increase the power of the radio frequency signal transmitted by the transmitting module 101 to the third radiator 122 and the fourth radiator 123. power, thereby reducing the SAR value and improving the communication performance of the third radiator 122 and the fourth radiator 123 . In the third application scenario, by detecting the impedance value of the third radiator 122 and the impedance value of the fourth radiator 123, it can be used to determine whether the electronic device 100 is in a vertical screen holding state, so as to determine whether the electronic device 100 is in a vertical position. When the screen is held, reduce the power of the radio frequency signal transmitted by the transmitting module 101 to the third radiator 122 and the fourth radiator 123, and increase the power of the radio frequency signal transmitted by the transmitting module 101 to the first radiator 120 and the second radiator 121. power, thereby reducing the SAR value and improving the communication performance of the first radiator 120 and the second radiator 121 . In the fourth application scenario, the surrounding environment of the first radiator 120 is judged by detecting the impedance value of the first radiator 120, so as to adaptively improve or reduce the influence of the transmitting module 101 on the radio frequency signal emitted by the first radiator 120. Power; determine the surrounding environment of the second radiator 121 by detecting the impedance value of the second radiator 121, thereby adaptively improving or reducing the power of the radio frequency signal emitted by the transmitting module 101 to the second radiator 121; by detecting the third radiator 121 The impedance value of the radiator 122 determines the surrounding environment of the third radiator 122, thereby adaptively improving or reducing the power of the radio frequency signal emitted by the transmitting module 101 to the third radiator 122; by detecting the impedance value of the fourth radiator 123 The surrounding environment of the fourth radiator 123 is determined, so as to adaptively increase or decrease the power of the radio frequency signal transmitted by the transmitting module 101 to the fourth radiator 123 . It can be understood that when the number of radiators 102 and the number of impedance detectors 103 are multiple, the power of the radio frequency signal corresponding to the radiator 102 can be adjusted according to the impedance value of the corresponding radiator 102, or can be adjusted according to one or more The impedance value of each radiator 102 determines the overall use environment of the electronic device 100 , and adjusts the power of the radio frequency signal transmitted to each corresponding radiator 102 .

Further, as shown in FIG. 6 , the electronic device 100 further includes at least one functional device 3 and a detection device 4 . One end of the detection device 4 is electrically connected to the functional device 3 , and the other end of the detection device 4 is electrically connected to the transmitting module 101 . The detecting device 4 is used to detect the working state of the functional device 3 and transmit the detected result to the transmitting module 101 . The transmitting module 101 is used for adjusting the power of transmitting radio frequency signals according to the impedance value of the radiator 102 and the detection result of the detection device 4 . Wherein, the functional device 3 may be a receiver, a microphone, a face recognition module, a camera module, a display screen, and the like. In this embodiment, the impedance value of the radiator 102 detected by the impedance detector 103 and the detection result of the detection device 4 are used to determine the use scene of the electronic device 100 more accurately, so that the transmission power can be adjusted according to the use scene of the electronic device 100, which can better take into account The communication quality and SAR value of the radiator 102 should be avoided to avoid a large SAR value or a poor communication quality of the radiator 102 . For example: when the electronic device 100 is equipped with a protective case, the impedance value of the radiator 102 is detected by the impedance detector 103 to determine that the use scene of the electronic device 100 may be different from the actual use scene of the electronic device 100, However, the impedance value of the radiator 102 detected by the impedance detector 103 and the detection result of the detection device 4 determine that the usage scenario of the electronic device 100 is closer to the actual usage scenario of the electronic device 100 .

As shown in FIG. 7 , the transmitting module 101 includes a modulator 110 and a transmitter 112 electrically connected. The first end 134 of the impedance detector 103 is electrically connected to the radiator 102 for detecting the power of the radio frequency signal received by the radiator 102 . The second end 135 of the impedance detector 103 is electrically connected to the transmitter 112 for detecting the power of the radio frequency signal reflected by the radiator 102 . The impedance detector 103 is used for determining the impedance value of the radiator 102 according to the power of the radio frequency signal received by the radiator 102 and the power of the radio frequency signal reflected by the radiator 102 . In this embodiment, the power of the radio frequency signal received by the radiator 102 is the power when the radio frequency signal emitted by the transmitter 112 is transmitted to the radiator 102 , that is, the input power of the radiator 102 . The second end 135 of the impedance detector 103 is electrically connected to the transmitter 112 to detect the power of the radio frequency signal reflected by the radiator 102. At this time, the power of the radio frequency signal reflected by the radiator 102 detected is the radio frequency signal reflected by the radiator 102 The power when transmitted to the transmitter 112. Since the radio frequency signal emitted by the transmitter 112 passes through the transmission line between the transmitter 112 and the radiator 102 when it is transmitted to the radiator 102, the radio frequency signal reflected by the radiator 102 also passes through the transmitter 112 and the radiator when it is transmitted to the transmitter 112. The transmission line between the body 102, so the loss caused by the transmission line can cancel each other, so that the impedance detector 103 determines the radiation body according to the power of the radio frequency signal received by the radiator 102 and the power of the radio frequency signal reflected by the radiator 102 The impedance value of 102 is more accurate. The third terminal 136 of the impedance detector 103 is electrically connected to the modulator 110 for feeding back the impedance value of the radiator 102 to the modulator 110 . The modulator 110 is configured to receive the impedance value of the radiator 102 fed back by the impedance detector 103 , and adjust the transmitting power of the transmitter 112 according to the impedance value of the radiator 102 . The transmitter 112 is used for transmitting the radio frequency signal after power adjustment. In the drawings of the present application, the solid arrows indicate the transmission direction of the detection signal, and the hollow arrows indicate the transmission directions of the transmission signal and the reception signal, and details will not be described later. Wherein, the first end 134 of the impedance detector 103 , the second end 135 of the impedance detector 103 , and the third end 136 of the impedance detector 103 may be independent ports, or at least two of them may share the same port.

Further, as shown in FIG. 8 , the antenna device 10 may further include a power amplifier 113 (power amplifier, PA). One end of the power amplifier 113 is electrically connected to the transmitter 112 , and the other end of the power amplifier 113 is electrically connected to the radiator 102 . The power amplifier 113 is used for receiving the radio frequency signal transmitted by the transmitter 112 and amplifying it before transmitting it to the radiator 102 .

The antenna device 10, the circuit board assembly 1 and the electronic equipment 100 provided in this application include a transmitting module 101, a radiator 102 and an impedance detector 103. Since the spatial environment of the radiator 102 changes its impedance, the application One end of impedance detector 103 is electrically connected to radiator 102, and the other end of impedance detector 103 is electrically connected to transmitting module 101. Impedance detector 103 detects the impedance value of radiator 102 and feeds it back to transmitting module 101. The impedance value of 102 adjusts the power of the transmitted radio frequency signal, so that the space environment where the radiator 102 is located can be determined according to the impedance value of the radiator 102, the transmission power is adjusted, the communication quality and the SAR value of the radiator 102 are taken into account, and the SAR value is avoided. Or the communication quality of the radiator 102 is poor.

In addition, the antenna device 10, the circuit board assembly 1 and the electronic device 100 provided by the present application adjust the transmission power of the transmitting module 101 by detecting the impedance value of the radiator 102, and only need to add an impedance detector between the transmitting module 101 and the radiator 102 103, compared with the technical solution of detecting external environment changes by setting a capacitive sensor in the related art, the hardware cost and occupied space can be reduced.

As shown in FIG. 9 , the antenna device 10 further includes a switch 104 . One end of the switch 104 is electrically connected to the impedance detector 103 , and the other end of the switch 104 is electrically connected to one of the radiator 102 and the emitter 112 . The toggle switch 104 may include a plurality of single pole single throw switches, one or more single pole double throw switches, one or more double pole double throw switches, or the like. In one embodiment, the connection end of the switch 104 is electrically connected to the first end 134 of the impedance detector 103 and the second end 135 of the impedance detector 103, that is, the first end 134 of the switch 104 and the impedance detector 103 and the impedance detection The second end 135 of the device 103 is always electrically coupled. The selection end of the switch 104 is electrically connected to one of the radiator 102 and the emitter 112, that is, the selection end of the switch 104 switches between the radiator 102 and the emitter 112, so that the emitter 112 and the radiator 102 One of them is connected to the impedance detector 103 . When the selection end of the switch 104 is electrically connected with the emitter 112, the emitter 112 is connected to the second end 135 of the impedance detector 103. At this time, the impedance detector 103 can be used to detect the input power of the emitter 112, that is, the radiation The power of the radio frequency signal reflected by the body 102. When the selection end of the switch 104 is connected to the radiator 102, the radiator 102 is connected to the first end 134 of the impedance detector 103. At this moment, the impedance detector 103 can be used to detect the power of the radio frequency signal received by the radiator 102 , that is, the input power of the radiator 102 . Of course, in other embodiments, the connection end of the switch 104 can be electrically coupled with the radiator 102 and the emitter 112, and the selection end of the switch 104 is between the first end 134 of the impedance detector 103 and the second end of the impedance detector 103. Terminal 135 is switched to conduct conduction between one of emitter 112 and radiator 102 and impedance detector 103 . In this embodiment, by setting the switching switch 104 , the interference of the two signals can be avoided when simultaneously detecting the power of the radio frequency signal received by the radiator 102 and the power of the radio frequency signal reflected by the radiator 102 .

As shown in FIG. 10 , the antenna device 10 further includes a coupler 105 . The first end 150 of the coupler 105 is electrically connected to the transmitter 112 , and the second end 151 of the coupler 105 is electrically connected to the radiator 102 . The first terminal 150 of the coupler 105 conducts with the second terminal 151 of the coupler 105 . The radio frequency signal transmitted by the transmitter 112 is transmitted between the first end 150 of the coupler 105 and the second end 151 of the coupler 105 . The third end 152 of the coupler 105 is electrically connected to the second end 135 of the impedance detector 103 . The third terminal 152 of the coupler 105 is in conduction with the first terminal 150 of the coupler 105 . The fourth end 153 of the coupler 105 is electrically connected to the first end 134 of the impedance detector 103 . The fourth terminal 153 of the coupler 105 conducts with the second terminal 151 of the coupler 105 . It can be understood that by electrically connecting the first end 150 of the coupler 105 to the transmitter 112, the second end 151 of the coupler 105 is electrically connected to the radiator 102, and the first end 150 of the coupler 105 is connected to the second end of the coupler 105. 151 is turned on, so that the transmitter 112 , the first end 150 of the coupler 105 , and the second end 151 of the coupler 105 , that is, the radiator 102 form a radio frequency signal transmission channel. By making the third end 152 of the coupler 105 electrically connected to the second end 135 of the impedance detector 103, the third end 152 of the coupler 105 is conducted with the first end 150 of the coupler 105, so that the transmitter 112, the coupler A signal transmission channel is formed between the first end 150 of the coupler 105 , the third end 152 of the coupler 105 , and the second end 135 of the impedance detector 103 , so as to detect the power of the radio frequency signal reflected by the radiator 102 . By making the fourth end 153 of the coupler 105 electrically connected to the first end 134 of the impedance detector 103, the fourth end 153 of the coupler 105 is conducted with the second end 151 of the coupler 105, so that the radiator 102, the coupler A signal transmission channel is formed between the second end 151 of the coupler 105 , the fourth end 153 of the coupler 105 , and the first end 134 of the impedance detector 103 , so as to detect the power of the radio frequency signal received by the radiator 102 . Optionally, one of the third end 152 of the coupler 105 and the fourth end 153 of the coupler 105 is electrically coupled to the selection end of the switch 104 . When the third terminal 152 of the coupler 105 is connected to the selection terminal of the switch 104 , the impedance detector 103 and the transmitter 112 can be connected, and the impedance detector 103 can be used to detect the input power of the transmitting module 101 . When the fourth terminal 153 of the coupler 105 is connected to the selection terminal of the switch 104 , the impedance detector 103 can be connected to the radiator 102 , and the impedance detector 103 can be used to detect the input power of the radiator 102 . In this embodiment, by setting the coupler 105, the electrical connection line between the impedance detector 103 and the transmitter 112 multiplexes the transmission line between the transmitter 112 and the first end 150 of the coupler 105, and the impedance detector 103 and The electrical connection line between the radiator 102 multiplexes the transmission line between the radiator 102 and the second end 151 of the coupler 105, which can reduce the number of connections between the impedance detector 103 and the radiator 102, and between the impedance detector 103 and the emitter. The line length between 112 is to facilitate line arrangement and reduce cost.

In one embodiment, as shown in FIG. 11 , the coupler 105 includes a first coupled line 154 and a second coupled line 155 disposed opposite to each other. The first coupling line 154 and the second coupling line 155 are coupled. The first coupling line 154 is electrically coupled between the first end 150 of the coupler 105 and the second end 151 of the coupler 105 . The second coupling line 155 is electrically coupled between the third end 152 of the coupler 105 and the fourth end 153 of the coupler 105 . The first coupling line 154 and the second coupling line 155 are coupled. It can be understood that the radio frequency signal on the first coupling line 154 can be coupled to the second coupling line 155 . When the third terminal 152 of the coupler 105 is connected to the selection terminal of the switch 104 , the radio frequency signal on the second coupling line 155 can be transmitted to the impedance detector 103 through the third terminal 152 of the coupler 105 and the switch 104 . When the fourth end 153 of the coupler 105 is connected to the selection end of the switch 104 , the radio frequency signal on the second coupling line 155 can be transmitted to the impedance detector 103 through the fourth end 153 of the coupler 105 and the switch 104 . This embodiment can also determine the power of the radio frequency signal received by the radiator 102 and the power of the radio frequency signal reflected by the radiator 102 by detecting the radio frequency signal on the first coupling line 154, so as to determine the impedance value of the radiator 102, without separately setting the line to use The impedance detector 103 is electrically connected with the radiator 102 and the emitter 112, which can further reduce the lines between the impedance detector 103 and the radiator 102, and between the impedance detector 103 and the emitter 112, so as to facilitate line layout and reduce costs .

As shown in FIG. 12 , the antenna device 10 further includes an impedance tuner 106 . The transmitter 112, the impedance tuner 106 and the radiator 102 are electrically connected in sequence. In one embodiment, the transmitter 112 , the coupler 105 , the impedance tuner 106 and the radiator 102 are electrically connected in sequence. The impedance tuner 106 is electrically coupled with the impedance detector 103 . In the embodiment of the present application, the impedance tuner 106 is electrically connected to the impedance detector 103 through a coupler 105 . The impedance tuner 106 is used to adjust the impedance matching according to the impedance value of the radiator 102 before the transmitting module 101 adjusts the power of the transmitted radio frequency signal. It can be understood that in the present application, when the use environment of the antenna device 10 changes, the impedance matching adjustment is first performed through the impedance tuner 106, so as to reduce the impact on the radiation far field of the antenna device 10 when the use environment of the antenna device 10 changes, and then The impedance value of the radiator 102 is fed back to the transmitting module 101 through the impedance detector 103, and the power of the transmitted radio frequency signal is adjusted through the transmitting module 101, so as to reduce the impact on the radiation near field of the antenna device 10 when the use environment of the antenna device 10 changes. , that is, to change the SAR value. In one embodiment, the impedance tuner 106 includes an impedance tuning unit and an impedance matching circuit. The impedance tuning unit is used to obtain the impedance value of the radiator 102 detected by the impedance detector 103 and adjust the corresponding impedance matching line according to the impedance value of the radiator 102, so that the impedance of the output end of the impedance tuner 106 is the same as that of the input end of the radiator 102. impedance matching. Impedance matching lines include components such as capacitors, inductors, and resistors. In this embodiment, the impedance matching adjustment is performed by the impedance tuner 106, so that the impedance of the output end of the impedance tuner 106 matches the impedance of the radiator 102, which can improve the transmission efficiency of radio frequency signals.

As shown in FIG. 13 , the antenna device 10 further includes a receiving module 107 . One end of the receiving module 107 is electrically connected to the radiator 102 for receiving the radio frequency signal emitted by the radiator 102 . The other end of the receiving module 107 is electrically connected to the impedance detector 103 for adjusting the power of receiving the radio frequency signal emitted by the radiator 102 according to the impedance value of the radiator 102 . In this embodiment, when the antenna device 10 is used to transmit electromagnetic wave signals, the transmission power of the antenna device 10 can be adjusted to take into account the communication quality and the SAR value of the radiator 102, so as to avoid the large SAR value or the poor communication quality of the radiator 102; When the antenna device 10 is used to receive electromagnetic wave signals, the receiving power of the antenna device 10 can be adjusted to improve the receiving efficiency of the antenna device 10 and reduce loss. Wherein, the receiving module 107 may include a demodulator 170 and a receiver 171 . The receiver 171 of the demodulator 170 is electrically coupled. The demodulator 170 is configured to receive the impedance value of the radiator 102 fed back by the impedance detector 103 , and adjust the receiving power of the receiver 171 according to the impedance value of the radiator 102 . The receiver 171 is used for receiving the radio frequency signal emitted by the radiator 102 . The radio frequency signal emitted by the radiator 102 is a radio frequency signal converted by the radiator 102 after receiving space electromagnetic waves. Of course, in other embodiments, the antenna device 10 may further include a low noise amplifier 172 (low noise amplifier, LNA), and the low noise amplifier 172 is electrically connected between the radiator 102 and the receiver 171 . The low noise amplifier 172 is responsible for signal amplification between the radiator 102 and the receiver 171 .

Further, as shown in FIG. 14 , the antenna device 10 may further include a duplexer 108 . A first end of the duplexer 108 is electrically connected to the transmitting module 101 , a second end of the duplexer 108 is electrically connected to the radiator 102 , and a third end of the duplexer 108 is electrically connected to the receiving module 107 . The duplexer 108 is used to switch between the transmitting module 101 and the receiving module 107 to make one of the transmitting module 101 and the receiving module 107 conduct with the radiator 102 . In one embodiment, the diplexer 108 is located between the power amplifier 113 and the coupler 105 on the transmit channel, and is located between the low noise amplifier 172 and the coupler 105 on the receive channel. In this embodiment, by setting the duplexer 108 to switch between the transmitting module 101 and the receiving module 107, the receiving channel and the transmitting channel of the antenna device 10 can be switched, so that the antenna device 10 can receive electromagnetic wave signals or can transmit electromagnetic wave signals.

The features mentioned above in the description, claims and drawings can be combined with one another in any way as long as they are meaningful within the scope of the present application. The advantages and features described for the antenna arrangement 10 apply in a corresponding manner to the printed circuit board assembly 1 and the electronic device 100 . Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application, and those skilled in the art can make the above-mentioned Changes, modifications, substitutions and modifications are made to the embodiments, and these improvements and modifications are also regarded as the protection scope of the present application.

Claims

An antenna device, characterized in that it comprises:

The transmitting module is used for transmitting radio frequency signals;

Radiator, electrically connected to the transmitting module, for receiving the radio frequency signal transmitted by the transmitting module and performing electromagnetic radiation;

An impedance detector, one end of the impedance detector is electrically connected to the radiator, the other end of the impedance detector is electrically connected to the transmitting module, the impedance detector is used to detect the impedance value of the radiator, and The impedance value of the radiator is fed back to the transmitting module, and the transmitting module is used for adjusting the power of transmitting radio frequency signals according to the impedance value of the radiator.
The antenna device according to claim 1, wherein when the impedance value of the radiator increases, the transmitting module reduces the power of the transmitted radio frequency signal; when the impedance value of the radiator decreases, the The transmitting module increases the power of the transmitted radio frequency signal.
The antenna device according to claim 1, wherein the impedance detector is electrically connected to the radiator through a conductive wire, and the impedance detector is electrically connected to the transmitting module through a conductive wire.
The antenna device according to claim 1, wherein the transmitting module includes an electrically connected modulator and a transmitter, and the first end of the impedance detector is electrically connected to the radiator for detecting the radiation The power of the radio frequency signal received by the radiator, the second end of the impedance detector is electrically connected to the transmitter for detecting the power of the radio frequency signal reflected by the radiator, and the impedance detector is used for receiving The power of the radio frequency signal and the power of the radio frequency signal reflected by the radiator determine the impedance value of the radiator, and the third end of the impedance detector is electrically connected to the modulator for adjusting the impedance of the radiator to value is fed back to the modulator.
The antenna device according to claim 4, wherein the antenna device further comprises a switch, one end of the switch is electrically connected to the impedance detector, and the other end of the switch is electrically connected to the radiator With one of the emitters, the switching switch is used to conduct the one of the radiator and the emitter with the impedance detector.
The antenna device according to claim 5, wherein the connection end of the switch is electrically connected to the first end of the impedance detector and the second end of the impedance detector, and the selection end of the switch is One of the radiator and the emitter is electrically coupled to switch between the radiator and the emitter.
The antenna device according to claim 4, wherein the antenna device further comprises a coupler, the first end of the coupler is electrically connected to the transmitter, and the second end of the coupler is electrically connected to the Radiator, the first end of the coupler is connected to the second end of the coupler, and the radio frequency signal emitted by the transmitter passes between the first end of the coupler and the second end of the coupler The third end of the coupler is electrically connected to the second end of the impedance detector, the third end of the coupler is connected to the first end of the coupler, and the fourth end of the coupler The terminal is electrically connected to the first terminal of the impedance detector, and the fourth terminal of the coupler is conducted with the second terminal of the coupler.
The antenna device according to claim 7, wherein the coupler includes a first coupling line and a second coupling line oppositely arranged, the first coupling line and the second coupling line are coupled, and the The first coupled line is electrically coupled between the first end of the coupler and the second end of the coupler, and the second coupled line is electrically coupled between the third end of the coupler and the second end of the coupler. between the fourth ends.
The antenna device according to any one of claims 1 to 8, wherein the antenna device further comprises an impedance tuner, the transmitter, the impedance tuner and the radiator are electrically connected in sequence, and the The impedance tuner is electrically connected to the impedance detector, and the impedance tuner is used for adjusting the impedance matching according to the impedance value of the radiator before the transmitting module adjusts the power of the transmitted radio frequency signal.
The antenna device according to claim 9, wherein the impedance tuner comprises an impedance tuning unit and an impedance matching circuit, and the impedance tuning unit is used to obtain the impedance value detected by the impedance detector and to The impedance matching line is adjusted so that the impedance of the output of the impedance tuner matches the impedance of the input of the radiator.
The antenna device according to any one of claims 1 to 8, wherein the antenna device further comprises a power amplifier, one end of the power amplifier is electrically connected to the transmitter, and the other end of the power amplifier is electrically connected to the The radiator, the power amplifier is used to receive the radio frequency signal emitted by the transmitter, amplify it and transmit it to the radiator.
The antenna device according to any one of claims 1 to 8, characterized in that the antenna device further comprises a receiving module, one end of the receiving module is electrically connected to the radiator, and is used to receive the radiation emitted by the radiator. RF signal, the other end of the receiving module is electrically connected to the impedance detector, and the receiving module is also used to adjust the power of receiving the radio frequency signal emitted by the radiator according to the impedance value of the radiator.
The antenna device according to claim 12, wherein the antenna device further comprises a duplexer, the first end of the duplexer is electrically connected to the transmitting module, and the second end of the duplexer is electrically The radiator is connected, the third end of the duplexer is electrically connected to the receiving module, and the duplexer is used to switch between the transmitting module and the receiving module so that the transmitting module and the receiving module One of the receiving modules is connected to the radiator.
A circuit board assembly, characterized by comprising a circuit board and the antenna device according to any one of claims 1 to 13, the transmitting module and the impedance detector are both arranged on the circuit board.
An electronic device, characterized by comprising a housing and the circuit board assembly according to claim 14, the circuit board is arranged in the housing, and the radiator is located on the housing.
The electronic device according to claim 15, characterized in that there are multiple radiators.
The electronic device according to claim 15, characterized in that there are multiple impedance detectors.
The electronic device according to claim 16, wherein the housing includes a middle frame, and the plurality of radiators include a first radiator, a second radiator, a third radiator, and a fourth radiator, the The first radiator, the second radiator, the third radiator and the fourth radiator are respectively located on the top frame, the bottom frame, the left frame and the right frame of the middle frame.
The electronic device according to claim 15, wherein the electronic device further comprises at least one functional device and a detection device, one end of the detection device is electrically connected to the functional device, and the other end of the detection device is electrically connected to The transmitting module, the detection device is used to detect the working state of the functional device and feed back the detected result to the transmitting module, and the transmitting module is used to The detection result of the device adjusts the power of the transmitted radio frequency signal.
The electronic device according to claim 19, wherein the functional device includes one or more of a receiver, a microphone, a face recognition module, a camera module, and a display screen.