Radio frequency transceiving device and intelligent terminal

Abstract

The utility model provides a radio frequency transmit-receive device and an intelligent terminal, the radio frequency transmit-receive device comprises a wireless chip, an amplification circuit and a WiFi antenna, and the amplification circuit is electrically connected between the wireless chip and the WiFi antenna; the amplifying circuit comprises a low-noise amplifier and a control switch, the control switch is provided with a transmitting end, a receiving end and an antenna end, the transmitting end is electrically connected with a signal output port of the wireless chip, the receiving end is electrically connected with an input end of the low-noise amplifier, and the antenna end is electrically connected with the WiFi antenna; the output end of the low noise amplifier is electrically connected with the signal input port of the wireless chip; the low noise amplifier is configured to amplify the received radio frequency signal and transmit the amplified radio frequency amplification signal to the signal input port of the wireless chip through the control switch. The radio frequency transceiving device is small in link noise coefficient and high in signal receiving sensitivity.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, in particular to a radio frequency transceiver device and a smart terminal. BACKGROUND

[0002] With the rapid development of mobile communication technology, mobile phones have become an indispensable communication tool in people's daily life. As one of the important wireless communication technologies of mobile phones, the performance of WiFi directly affects the network experience of users. However, in actual use, due to various reasons, the WiFi receiving sensitivity of mobile phones is often not satisfactory, especially in the scenario of partition wall or weak signal, the user experience is poor.

[0003] In the process of conceiving and implementing the present application, the inventors found that at least the following problems exist: The wireless chip of the mobile phone platform usually adopts the design of built-in low noise amplifier (LNA), but due to the high integration inside the chip, WiFi, BT, GPS, FM and other functions are integrated together, resulting in a large noise figure of the built-in WiFi LNA, and the overall WiFi sensitivity is low.

[0004] The foregoing narrative is to provide general background information and does not necessarily constitute the prior art. CONTENT OF THE INVENTION

[0005] In view of the above technical problems, the present application provides a radio frequency transceiver device and a smart terminal, by adding an amplification circuit containing an external low noise amplifier at the output end of the radio frequency transceiver device, the noise figure of the link is reduced, and the receiving sensitivity of the whole machine is improved.

[0006] To solve the above technical problems, the present application provides a radio frequency transceiver device, which comprises a wireless chip, an amplification circuit and a WiFi antenna, the amplification circuit is electrically connected between the wireless chip and the WiFi antenna;

[0007] The amplification circuit comprises a low noise amplifier and a control switch, the control switch has a transmitting end, a receiving end and an antenna end, the transmitting end is electrically connected with the signal output port of the wireless chip, the receiving end is electrically connected with the input end of the low noise amplifier, the antenna end is electrically connected with the WiFi antenna, and the output end of the low noise amplifier is electrically connected with the signal input port of the wireless chip;

[0008] The low noise amplifier is configured to amplify the received radio frequency signal, and transmit the amplified radio frequency amplified signal to the signal input port of the wireless chip through the control switch.

[0009] Optionally, the amplification circuit further comprises a bypass switch, the bypass switch is arranged in parallel with the low-noise amplifier; when the intensity of the radio frequency signal is higher than a threshold value, the control switch is conducted through the bypass switch and the signal input port of the wireless chip.

[0010] Optionally, the radio frequency transceiver device further comprises a filter, the filter is electrically connected between the antenna end of the control switch and the WiFi antenna, so that the wireless signal of the target frequency band is transmitted to the wireless chip.

[0011] Optionally, the amplification circuit comprises at least two, the two amplification circuits are used to process WiFi signals of different frequency bands.

[0012] Optionally, the signal input port of the wireless chip comprises a first sub-input port and a second sub-input port, the signal output port comprises a first sub-output port and a second sub-output port, the WiFi antenna comprises a first antenna, the amplification circuit comprises a first sub-circuit and a second sub-circuit, the control switch comprises a first sub-switch and a second sub-switch, and the low-noise amplifier comprises a first sub-amplifier and a second sub-amplifier.

[0013] Optionally, the first sub-output port is electrically connected with the transmitting end of the first sub-switch, the antenna end of the first sub-switch is electrically connected with the first antenna, and the first sub-output port is used for transmitting WiFi signals of a 2.4 GHz frequency band; the second sub-output port is electrically connected with the transmitting end of the second sub-switch, the antenna end of the second sub-switch is electrically connected with the first antenna, and the second sub-output port is used for transmitting WiFi signals of a 5 GHz frequency band.

[0014] Optionally, the receiving end of the first sub-switch is electrically connected with the input end of the first sub-amplifier, the output end of the first sub-amplifier is electrically connected with the first sub-input port, and the first sub-amplifier is used for receiving WiFi signals of a 2.4 GHz frequency band; the first antenna is electrically connected with the antenna end of the second sub-switch, the receiving end of the second sub-switch is electrically connected with the input end of the second sub-amplifier, and the output end of the second sub-amplifier is electrically connected with the second sub-input port, and the second sub-amplifier is used for receiving WiFi signals of a 5 GHz frequency band.

[0015] Optionally, the radio frequency transceiver device further comprises a first combiner, the first combiner comprises a first end, a second end and a third end, the first end of the first combiner is electrically connected with the antenna end of the first sub-switch, the second end of the first combiner is electrically connected with the antenna end of the second sub-switch, the third end of the first combiner is electrically connected with the first antenna, and the first combiner is configured to combine signals of different frequency bands to the first antenna.

[0016] Optionally, the signal input port of the wireless chip comprises a third sub-input port and a fourth sub-input port, the signal output port comprises a third sub-output port and a fourth sub-output port, the amplification circuit comprises a third sub-circuit and a fourth sub-circuit, the control switch comprises a third sub-switch and a fourth sub-switch, the low-noise amplifier further comprises a third sub-amplifier and a fourth sub-amplifier, and the WiFi antenna further comprises a second antenna. Optionally, the third sub-output port is electrically connected with the transmitting end of the third sub-switch, the antenna end of the third sub-switch is electrically connected with the second antenna, and the third sub-switch is configured to transmit a WiFi signal of a 2.4 GHz frequency band; the fourth sub-output port is electrically connected with the transmitting end of the fourth sub-switch, the antenna end of the fourth sub-switch is electrically connected with the second antenna, and the fourth sub-switch is configured to transmit a WiFi signal of a 5 GHz frequency band.

[0017] Optionally, the receiving end of the third sub-switch is electrically connected with the input end of the third sub-amplifier, the output end of the third sub-amplifier is electrically connected with the third sub-input port, and the third sub-amplifier is configured to receive a WiFi signal of a 2.4 GHz frequency band; the second antenna is electrically connected with the antenna end of the fourth sub-switch, the receiving end of the fourth sub-switch is electrically connected with the input end of the fourth sub-amplifier, and the output end of the fourth sub-amplifier is electrically connected with the fourth sub-input port, and the fourth sub-amplifier is configured to receive a WiFi signal of a 5 GHz frequency band.

[0018] Optionally, the radio frequency transceiver device further comprises a second combiner, the second combiner comprises a fourth end, a fifth end and a sixth end, the fourth end of the second combiner is electrically connected with the antenna end of the third sub-switch, the fifth end of the second combiner is electrically connected with the antenna end of the fourth sub-switch, and the sixth end of the second combiner is electrically connected with the second antenna, and the second combiner is configured to combine signals of different frequency bands to the second antenna.

[0019] The application further provides a smart terminal comprising the radio frequency transceiver device provided in any of the above embodiments.

[0020] Optionally, the smart terminal further comprises a mainboard and a metal frame, the metal frame is arranged around the outer periphery of the mainboard, the wireless chip and the amplification circuit are arranged on the mainboard, and at least part of the metal frame is the WiFi antenna.

[0021] The radio frequency transceiver provided by the application significantly reduces the link noise factor (NF) and insertion loss by externally placing a low noise amplifier (LNA) between a wireless chip and an antenna and optimizing a signal path by combining a control switch, thereby improving the receiving sensitivity in a weak signal scenario. Optionally, the amplification circuit includes a low noise amplifier and a control switch, the transmitting end, the receiving end and the antenna end of the control switch are connected to the signal output port of the wireless chip, the input end of the LNA and the WiFi antenna respectively, forming a separate transceiving double path, when transmitting, the signal is directly transmitted from the signal output port of the wireless chip to the antenna through the control switch, reducing the transmission link insertion loss; when receiving, the signal is switched from the antenna to the external LNA after amplification and then input into the wireless chip, the NF of the external LNA is much lower than that of the built-in LNA, in combination with the shortened transmission path, the overall link noise factor is reduced. In addition, the external LNA can be flexibly arranged close to the antenna, further reducing signal attenuation, and the fast switching capability (such as SPDT radio frequency switch) of the control switch ensures efficient transceiving in the duplex mode. Through the hardware architecture innovation, the sensitivity bottleneck caused by the integrated design in the prior art is solved, and the multi-band support and power optimization are also considered, which is suitable for terminal devices such as smart phones with limited space. BRIEF DESCRIPTION OF DRAWINGS

[0022] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application. In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed to be used in the embodiment description will be briefly introduced as follows, and obviously, other drawings can also be obtained by those skilled in the art without creative labor on the premise of the drawings.

[0023] Figure 1 A hardware structure schematic diagram of a mobile terminal for implementing various embodiments of the application;

[0024] Figure 2 A communication network system architecture diagram provided by the embodiments of the application;

[0025] Figure 3 An architecture diagram of a radio frequency transceiver provided by the embodiments of the application;

[0026] Figure 4 A structure schematic diagram of a smart terminal provided by the embodiments of the application.

[0027] The objectives, features and advantages of the present application will be further illustrated by the following embodiments in conjunction with the accompanying drawings. The above-mentioned drawings have shown the specific embodiments of the present application, and will be described in more detail hereinafter. These drawings and the written description are not intended to restrict the scope of the present application in any way, but to illustrate the concept of the present application by referring to specific embodiments. DETAILED DESCRIPTION

[0028] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The following description is made with reference to the accompanying drawings in which like reference numerals refer to like elements, unless otherwise indicated. The following exemplary embodiments described herein describe implementations consistent with aspects of the present application. They are not meant to represent all implementations consistent with aspects of the present application. Rather, they are only examples of apparatus and methods consistent with aspects of the present application as detailed in the appended claims.

[0029] It should be noted that, in this document, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element. Components, features, elements, etc. having the same name in different embodiments can or can not have the same meaning.

[0030] It should be understood that, although the terms first, second, third, etc. can be employed in this disclosure to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one category of information from another. For example, without departing from the scope of this disclosure, the first information can also be referred to as the second information, and similarly, the second information can also be referred to as the first information. Depending on the context, the word "if' as used herein can be interpreted to mean "when" or "in response to determining". Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", as used herein, specify the presence of stated features, steps, operations, elements, components, items, kinds and / or groups but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, items, kinds and / or groups. As used herein, the terms "or", "and / or", "at least one of", and the like are to be interpreted as inclusive, or meaning any one or any combination. For example, "at least one of A, B, and C" means "A; B; C; A and B; A and C; B and C; or A and B and C". As another example, "A, B, or C" or "A, B, and / or C" means "A; B; C; A and B; A and C; B and C; or A and B and C". Only under circumstances when a combination of elements, functions, steps, or operations are inherently mutually exclusive is an exception to this definition.

[0031] It should be understood that the specific embodiments described herein merely exemplify the application and should not be construed as limiting the application.

[0032] In the following description, the suffixes "module", "part", or "unit" used for components are merely intended for facilitating description of the present application, and are not intended to limit the application otherwise. Therefore, "module", "part", or "unit" can be mixedly used.

[0033] The smart terminal can be implemented in various forms. For example, the smart terminal described in the present application can include a mobile terminal such as a mobile phone, a tablet, a notebook, a palmtop, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and a fixed terminal such as a digital TV, a desktop computer, and the like.

[0034] In the following description, a mobile terminal will be exemplified, and those skilled in the art will understand that the configuration according to the embodiments of the present application can be applied to a fixed type terminal, except for elements particularly used for mobile purposes.

[0035] Please see Figure 1 This is a schematic diagram of the hardware structure of a mobile terminal implementing various embodiments of this application. The smart terminal 100 may include: an RF (Radio Frequency) unit 101, a WiFi module 102, an audio output unit 103, an A / V (Audio / Video) input unit 104, a sensor 105, a display unit 106, a user input unit 107, an interface unit 108, a memory 109, a processor 110, and a power supply 111, etc. Those skilled in the art will understand that... Figure 1 The mobile terminal structure shown does not constitute a limitation on the mobile terminal. The mobile terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0036] The following is combined Figure 1 A detailed introduction to each component of the mobile terminal:

[0037] The radio frequency unit 101 can be used for receiving and transmitting signals during information transmission or calls. Specifically, it receives downlink information from the base station and processes it with the processor 110; additionally, it transmits uplink data to the base station. Typically, the radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, and a duplexer. Furthermore, the radio frequency unit 101 can also communicate wirelessly with networks and other devices. The aforementioned wireless communications may use any communication standard or protocol, including but not limited to GSM (Global System of Mobile communication), GPRS (General Packet Radio Service), CDMA2000 (Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division Duplexing-Long Term Evolution), TDD-LTE (Time Division Duplexing-Long Term Evolution), and 5G, etc.

[0038] WiFi belongs to short-range wireless transmission technology, and the smart terminal can help users send and receive emails, browse web pages, and access streaming media through the WiFi module 102, which provides users with wireless broadband Internet access. Although Figure 1 The WiFi module 102 is shown, but it is understood that it does not belong to the necessary structure of the smart terminal, and can be omitted as needed without changing the essence of the application.

[0039] The audio output unit 103 can convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output it as sound when the smart terminal 100 is in a call signal receiving mode, a talk mode, a recording mode, a voice recognition mode, a broadcast receiving mode, and the like. Moreover, the audio output unit 103 can also provide audio output related to a particular function performed by the smart terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 can include a speaker, a buzzer, and the like.

[0040] The A / V input unit 104 is used to receive audio or video signals. The A / V input unit 104 can include a graphics processor (GPU) 1041 and a microphone 1042, the graphics processor 1041 processes image data of a still picture or a video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The processed image frame can be displayed on the display unit 106. The image frame processed by the graphics processor 1041 can be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 can receive sound (audio data) via the microphone 1042 in a telephone call mode, a recording mode, a voice recognition mode, and the like, and can process such sound into audio data. The processed audio (voice) data can be converted into a format that can be transmitted to a mobile communication base station via the radio frequency unit 101 in the case of a telephone call mode. The microphone 1042 can implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the process of receiving and transmitting audio signals.

[0041] The intelligent terminal 100 further includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Optionally, the light sensor includes an ambient light sensor and a proximity sensor, the ambient light sensor can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and the proximity sensor can turn off the display panel 1061 and / or the backlight when the intelligent terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally three axes), and when at rest, it can detect the magnitude and direction of gravity, which can be used for applications such as identifying the posture of the mobile phone (such as switching between horizontal and vertical screens, related games, and magnetometer posture calibration), vibration recognition related functions (such as pedometers, taps), and the like. As for the fingerprint sensor, pressure sensor, iris sensor, molecular sensor, gyroscope, barometer, hygrometer, thermometer, infrared sensor, and other sensors that can be configured on the mobile phone, they will not be described here.

[0042] The display unit 106 is configured to display information input by a user or information provided to the user. The display unit 106 can include a display panel 1061, which can be configured in the form of a liquid crystal display (LCD), an organic light-emitting diode (OLED), or the like.

[0043] The user input unit 107 can be configured to receive input digital or character information, and to generate key signal inputs related to user settings and function control of the intelligent terminal. Optionally, the user input unit 107 can include a touch panel 1071 and other input devices 1072. The touch panel 1071, also known as a touch screen, can collect user touch operations (such as user operations using a finger, a stylus, or any suitable object or accessory on or near the touch panel 1071) on or near it, and drive the corresponding connection device according to the pre-set program. The touch panel 1071 can include two parts: a touch detection device and a touch controller. Optionally, the touch detection device detects the user's touch position and detects the signals generated by the touch operation, and transmits the signals to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into touch coordinates, and sends it to the processor 110, and can also receive commands from the processor 110 and execute them. In addition, the touch panel 1071 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 can also include other input devices 1072. Optionally, the other input devices 1072 can include one or more of a physical keyboard, function keys (such as volume control buttons, on / off buttons, etc.), trackballs, mice, joysticks, and the like, without limitation.

[0044] Optionally, the touch panel 1071 can cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, it transmits to the processor 110 to determine the type of touch event, and then the processor 110 provides corresponding visual output on the display panel 1061 according to the type of touch event. Although in the above embodiment, the touch panel 1071 and the display panel 1061 are implemented as two independent components to realize the input and output functions of the smart terminal, in some embodiments, the touch panel 1071 and the display panel 1061 can be integrated to realize the input and output functions of the smart terminal, which is not limited here. Figure 1 Optionally, the touch panel 1071 can cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, it transmits to the processor 110 to determine the type of touch event, and then the processor 110 provides corresponding visual output on the display panel 1061 according to the type of touch event. Although in the above embodiment, the touch panel 1071 and the display panel 1061 are implemented as two independent components to realize the input and output functions of the smart terminal, in some embodiments, the touch panel 1071 and the display panel 1061 can be integrated to realize the input and output functions of the smart terminal, which is not limited here.

[0045] The interface unit 108 serves as an interface through which at least one external device can be connected to the smart terminal 100. For example, the external device can include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input / output (I / O) port, a video I / O port, an earphone port, and the like. The interface unit 108 can be used to receive input (e.g., data information, power, and the like) from an external device and transmit the received input to one or more elements within the smart terminal 100 or can be used to transmit data between the smart terminal 100 and the external device.

[0046] The memory 109 can be used to store software programs and various data. The memory 109 can mainly include a program storage area and a data storage area, and the program storage area can store, for example, an operating system, application programs (e.g., a sound play function, an image play function, and the like) required for at least one function, and the like, and the data storage area can store, for example, data created according to the use of the smart terminal (e.g., audio data, a phonebook, and the like), and the like. In addition, the memory 109 can include a high-speed random access memory, and can further include a non-volatile memory such as at least one of a magnetic disk storage device, a flash memory device, or other non-volatile solid state storage device.

[0047] The processor 110 is a control center of the smart terminal, connects various parts of the entire smart terminal through various interfaces and lines, performs various functions of the smart terminal and processes data by running or executing software programs and / or modules stored in the memory 109 and calling data stored in the memory 109, and thus performs overall monitoring of the smart terminal. The processor 110 can include one or more processing units; preferably, the processor 110 can integrate an application processor and a modem processor, and the application processor can mainly process an operating system, a user interface, and application programs, and the like, and the modem processor can mainly process wireless communication. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 110.

[0048] The intelligent terminal 100 can further include a power supply 111 (such as a battery) for supplying power to various components. Preferably, the power supply 111 can be logically connected to the processor 110 through a power management system, so that the power management system can be used to manage charging, discharging, power consumption management, and the like.

[0049] Although Figure 1 The intelligent terminal 100 can further include a Bluetooth module and the like, which are not described here.

[0050] In order to facilitate understanding of the embodiments of the present application, the communication network system based on the intelligent terminal of the present application is described below.

[0051] Please refer to Figure 2 , Figure 2 A communication network system architecture diagram provided by the embodiments of the present application is shown in FIG. 2. The communication network system is a LTE system of general mobile communication technology. The LTE system includes a UE (User Equipment) 201, an E-UTRAN (Evolved UMTS Terrestrial Radio Access Network) 202, an EPC (Evolved Packet Core) 203, and an operator's IP service 204, which are connected in sequence.

[0052] Optionally, the UE 201 can be the terminal 100 described above, which is not described here.

[0053] The E-UTRAN 202 includes an eNodeB 2021 and other eNodeBs 2022. Optionally, the eNodeB 2021 can be connected to the other eNodeBs 2022 through a backhaul (such as an X2 interface), the eNodeB 2021 is connected to the EPC 203, and the eNodeB 2021 can provide access for the UE 201 to the EPC 203.

[0054] The EPC 203 can include an MME (Mobility Management Entity) 2031, an HSS (Home Subscriber Server) 2032, other MMEs 2033, an SGW (Serving Gate Way) 2034, a PGW (PDN Gate Way) 2035, and a PCRF (Policy and Charging Rules Function) 2036, and the like. Optionally, the MME 2031 is a control node that processes signaling between the UE 201 and the EPC 203, and provides bearer and connection management. The HSS 2032 is configured to provide some registers to manage functions such as a home location register (not shown in the figure), and to store some user-specific information about service features, data rates, and the like. All user data can be transmitted through the SGW 2034, the PGW 2035 can provide IP address allocation and other functions for the UE 201, and the PCRF 2036 is a policy and charging control policy decision point for service data flow and IP bearer resources, which selects and provides available policy and charging control decisions for a policy and charging enforcement function unit (not shown in the figure).

[0055] The IP service 204 can include the Internet, an intranet, an IMS (IP Multimedia Subsystem), or other IP services, and the like.

[0056] Although the above is described by taking the LTE system as an example, those skilled in the art should know that the present application is not only applicable to the LTE system, but also applicable to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, 5G, and future new network systems (such as 6G), and the like, which are not limited herein.

[0057] Based on the above intelligent terminal hardware structure and communication network system, various embodiments of the present application are proposed.

[0058] As described in the background, with the rapid development of mobile communication technology, mobile phones have become an indispensable communication tool in people's daily life. As one of the important wireless communication technologies of mobile phones, the performance of WiFi directly affects the network experience of users. However, in actual use, due to various reasons, the WiFi receiving sensitivity of the mobile phone is often not satisfactory, especially in the scenario of a partition wall or a weak signal, the user experience is poor.

[0059] Currently, the wireless chip of the mobile phone platform usually adopts the design of built-in low noise amplifier (LNA), but due to the high integration inside the chip, the WiFi, BT, GPS, FM and other functions are integrated together, resulting in a large noise factor of the built-in WiFi LNA and a low overall WiFi sensitivity. In the whole machine design, the distance between the wireless chip and the antenna is far, the signal transmission path is long, the insertion loss increases, and the sensitivity is further deteriorated.

[0060] In view of the above problems, the embodiment of the present application provides a radio frequency transceiver device, which externally places a low noise amplifier (LNA) between a wireless chip and an antenna, and optimizes the signal path by combining a control switch, thereby significantly reducing the link noise factor (NF) and the insertion loss (insertion loss), and improving the receiving sensitivity in a weak signal scenario. Optionally, the amplification circuit includes a low noise amplifier and a control switch, the transmitting end, the receiving end and the antenna end of the control switch are connected to the signal output port of the wireless chip, the input end of the LNA and the WiFi antenna respectively, forming a separate transceiving double path. When transmitting, the signal directly reaches the antenna from the signal output port of the wireless chip through the control switch, reducing the transmission link insertion loss; when receiving, the signal is switched from the antenna to the external LNA after amplification and then input into the wireless chip. The NF of the external LNA is much lower than that of the built-in LNA, and the transmission path is shortened, so that the overall link noise factor is reduced. Optionally, the external LNA can be flexibly arranged close to the antenna, further reducing signal attenuation, and the fast switching capability (such as SPDT radio frequency switch) of the control switch ensures efficient transceiving in the duplex mode. Through hardware architecture innovation, the sensitivity bottleneck caused by the integrated design in the prior art is solved, while the multi-band support and power optimization are also considered, which is suitable for terminal devices such as smart phones with limited space.

[0061] In combination with Figure 1 and Figure 2 , the embodiment of the present application provides a radio frequency transceiver device, which includes a wireless chip 10, an amplification circuit 20 and a WiFi antenna 30. The wireless chip 10 has a signal input port 11 and a signal output port 12. The amplification circuit 20 is electrically connected between the wireless chip 10 and the WiFi antenna 30. The amplification circuit 20 includes a low noise amplifier 21 and a control switch 22. The low noise amplifier 21 has an input end and an output end. The control switch 22 has a transmitting end 221, a receiving end 222 and an antenna end 223. The transmitting end 221 is electrically connected to the signal output port 12 of the wireless chip 10. The receiving end 222 is electrically connected to the input end of the low noise amplifier 21. The antenna end 223 is used to be electrically connected to the WiFi antenna 30. The output end of the low noise amplifier 21 is electrically connected to the signal input port 11 of the wireless chip 10. The low noise amplifier 21 is configured to amplify the received radio frequency signal and transmit the amplified radio frequency signal to the signal input port 11 of the wireless chip 10 through the control switch 22.

[0062] Optionally, the wireless chip 10 is responsible for the baseband processing of the WiFi signal, including a signal input port 11 (receiving) and an output port (transmitting), a low noise amplifier 21 (LNA) in the amplification circuit 20 for amplifying the received signal, and a control switch 22 for switching the transceiver path. In this embodiment, the signal receiving path is antenna→control switch 22 (antenna end 223→receiving end 222)→LNA (input end→output end)→wireless chip 10 input port, and the signal transmitting path is wireless chip 10 output port→control switch 22 (transmitting end 221→antenna end 223)→antenna.

[0063] Optionally, the control switch 22 can use a single-pole double-throw (SPDT) radio frequency switch to support 2.4 GHz / 5 GHz frequency band switching. The LNA parameters are: noise factor NF≤1.5 dB, and the gain adjustable range is 10-20 dB.

[0064] Optionally, the noise factor (NF) of the receiving link is reduced by the external low noise amplifier 21 (LNA) to enhance the weak signal receiving capability. The control switch 22 dynamically switches the transceiver path, shortens the signal transmission distance, and reduces the insertion loss (insertion loss). Moreover, the direct connection of the amplification circuit 20 and the wireless chip 10 simplifies the radio frequency link and reduces the design complexity.

[0065] In some embodiments, the amplification circuit 20 further includes a bypass switch 23, which is arranged in parallel with the low noise amplifier 21. When the strength of the radio frequency signal is higher than a threshold value, the control switch 22 is conducted through the bypass switch 23 and the signal input port 11 of the wireless chip 10.

[0066] Optionally, the bypass switch 23 is a physical switch (such as MOSFET or radio frequency switch) connected in parallel with the LNA, which directly conducts the signal path. The wireless chip 10 triggers the bypass mode by detecting the received signal strength indication (RSSI).

[0067] Optionally, the input end of the bypass switch 23 is connected to the receiving end 222 of the control switch 22, and the output end of the bypass switch 23 is connected to the input port of the wireless chip 10. The bypass control signal can be output from the wireless chip 10 to the bypass switch 23 through the GPIO or MIPI interface. Optionally, the RSSI threshold value can be preset as -60 dBm, and the bypass is enabled when the value is higher than this value.

[0068] In this way, the bypass function is enabled in a strong signal scenario, and the LNA is turned off to save power consumption. Moreover, bypassing the LNA can avoid the introduction of additional noise and improve the signal purity.

[0069] In some embodiments, the radio frequency transceiver device further comprises a filter 40 electrically connected between the antenna end 223 of the control switch 22 and the WiFi antenna 30, so that the wireless signals of the target frequency band are transmitted to the wireless chip 10.

[0070] Optionally, the filter 40 is a surface acoustic wave (SAW) filter 40, and the center frequencies are 2.4 GHz and 5 GHz, respectively.

[0071] Optionally, the bandwidth of the 2.4 GHz filter 40 is ±50 MHz, and the insertion loss is ≤1.5 dB; the bandwidth of the 5 GHz filter 40 is ±100 MHz, and the insertion loss is ≤2.0 dB.

[0072] Optionally, the filter 40 filters out out-of-band interference signals (such as Bluetooth and cellular signals), improves the signal-to-noise ratio of the target frequency band, and the arrangement of the filter 40 ensures that the 2.4 GHz and 5 GHz signals are processed independently to avoid crosstalk.

[0073] In some embodiments, the amplification circuit 20 comprises at least two, and the two amplification circuits 20 are used to process WiFi signals of different frequency bands.

[0074] In some embodiments, the signal input port 11 of the wireless chip 10 comprises a first sub-input port 111 and a second sub-input port 112, the signal output port 12 comprises a first sub-output port 121 and a second sub-output port 122, the WiFi antenna 30 comprises a first antenna 31, the amplification circuit 20 comprises a first sub-circuit 24 and a second sub-circuit 25, the control switch 22 comprises a first sub-switch 224 and a second sub-switch 225, and the low-noise amplifier 21 comprises a first sub-amplifier 211 and a second sub-amplifier 212.

[0075] Optionally, the first sub-output port 121 is electrically connected to the transmitting end 221 of the first sub-switch 224, the antenna end 223 of the first sub-switch 224 is electrically connected to the first antenna 31, and is used for transmitting WiFi signals of the 2.4 GHz frequency band; the second sub-output port 122 is electrically connected to the transmitting end 221 of the second sub-switch 225, the antenna end 223 of the second sub-switch 225 is electrically connected to the first antenna 31, and is used for transmitting WiFi signals of the 5 GHz frequency band.

[0076] Optionally, the receiving end 222 of the first sub-switch 224 is electrically connected to the input end of the first sub-amplifier 211, the output end of the first sub-amplifier 211 is electrically connected to the first sub-input port 111, and is used for receiving WiFi signals of the 2.4 GHz frequency band; the first antenna 31 is electrically connected to the antenna end 223 of the second sub-switch 225, the receiving end 222 of the second sub-switch 225 is electrically connected to the input end of the second sub-amplifier 212, and the output end of the second sub-amplifier 212 is connected to the second sub-input port 112, and is used for receiving WiFi signals of the 5 GHz frequency band.

[0077] Thus, multi-band support is achieved, that is, the radio frequency transceiver device can independently process 2.4 GHz and 5 GHz signals, meeting the dual-frequency WiFi demand, and the data throughput and anti-interference capability are improved through the multi-path amplification circuit 20.

[0078] In some embodiments, the first combiner 50 is further included, the combiner comprising a first end, a second end and a third end, the first end of the combiner being electrically connected to the antenna end 223 of the first sub-switch 224, the second end of the combiner being electrically connected to the antenna end 223 of the second sub-switch 225, and the third end of the combiner being electrically connected to the first antenna 31, the combiner being configured to combine signals of different frequency bands to the first antenna 31.

[0079] In some embodiments, the signal input port 11 of the wireless chip 10 comprises a third sub-input port 113 and a fourth sub-input port 114, the signal output port 12 comprises a third sub-output port 123 and a fourth sub-output port 124, the amplification circuit 20 comprises a third sub-circuit 26 and a fourth sub-circuit 27, the control switch 22 comprises a third sub-switch 226 and a fourth sub-switch 227, the low-noise amplifier 21 further comprises a third sub-amplifier 213 and a fourth sub-amplifier 214, and the WiFi antenna 30 further comprises a second antenna 32.

[0080] Optionally, the third sub-output port 123 is electrically connected to the transmitting end 221 of the third sub-switch 226, the antenna end 223 of the third sub-switch 226 is electrically connected to the second antenna 32, for transmitting WiFi signals of the 2.4 GHz frequency band; the fourth sub-output port 124 is electrically connected to the transmitting end 221 of the fourth sub-switch 227, and the antenna end 223 of the fourth sub-switch 227 is electrically connected to the second antenna 32, for transmitting WiFi signals of the 5 GHz frequency band.

[0081] Optionally, the receiving end 222 of the third sub-switch 226 is electrically connected to the input end of the third sub-amplifier 213, the output end of the third sub-amplifier 213 is electrically connected to the third sub-input port 113, for receiving WiFi signals of the 2.4 GHz frequency band; the second antenna 32 is electrically connected to the antenna end 223 of the fourth sub-switch 227, the receiving end 222 of the fourth sub-switch 227 is electrically connected to the input end of the fourth sub-amplifier 214, the output end of the fourth sub-amplifier 214 is electrically connected to the fourth sub-input port 114, for receiving WiFi signals of the 5 GHz frequency band.

[0082] In some embodiments, the radio frequency transceiver device further comprises a second combiner 60, the second combiner 60 having a fourth end, a fifth end and a sixth end, the fourth end of the second combiner 60 being electrically connected to the antenna end 223 of the third sub-switch 226, the fifth end of the combiner being electrically connected to the antenna end 223 of the fourth sub-switch 227, and the sixth end of the combiner being electrically connected to the second antenna 32, the second combiner 60 being configured to combine signals of different frequency bands to the second antenna 32.

[0083] Optionally, the second combiner 60 has a parameter of: 2.4GHz pass insertion loss ≤1.0dB, 5GHz pass insertion loss ≤1.2dB, and frequency band isolation ≥35dB.

[0084] In this way, the 2.4GHz and 5GHz signals can be combined to the same antenna, the second antenna 32 expands the support of 4x4 MIMO, improves the channel capacity, and through the combiner, the dual-band signals are combined to a single antenna, the number of antennas is reduced, and the space utilization rate of the radio frequency transceiver device used in a terminal device is also improved.

[0085] Optionally, an amplification circuit 20 including an eLNA module is added between the output end of the wireless chip 10 and the antenna, the WiFi transmission signal is output through the WF_RFIO port of the wireless chip 10, passes through the TX switch port of the eLNA module, and is connected to the antenna, the WiFi reception signal is connected to the WF_AUX interface of the wireless chip 10 after passing through the LNA module after being connected to the antenna from the ANT port of the eLNA module, so that the entire signal link is completed.

[0086] The embodiments of the present application also provide a smart terminal, which comprises the radio frequency transceiver device provided by at least one of the embodiments.

[0087] In some embodiments, the smart terminal further comprises a mainboard 70 and a metal frame, the metal frame is arranged around the outer circumferential side of the mainboard 70, the wireless chip 10 and the amplification circuit 20 are arranged on the mainboard 70, and at least part of the metal frame is the WiFi antenna 30.

[0088] Optionally, the wireless chip and the amplification circuit are located at the edge of the mainboard, the connection distance with the antenna can be shortened, the IFA (inverted F antenna) or the slot antenna is designed by using the frame structure, and multi-band radiation is supported.

[0089] In combination Figure 4 , the external eLNA of the embodiments of the present application can be placed close to the WiFi antenna, so as to reduce the sensitivity deterioration caused by the large insertion loss of the entire link due to the wiring, and the noise coefficient of the external eLNA is much smaller than that of the built-in LNA of the platform, according to the sensitivity calculation formula Ps=-174.32+10lg(BW)+NF+SNR, in the case where the bandwidth and the signal-to-noise ratio are unchanged, reducing the NF of the link can improve the overall receiving sensitivity.

[0090] In the embodiment of the intelligent terminal provided in the present application, all the technical features of any of the above monopole antenna embodiments can be included, and the description expansion and explanation are basically the same as those of the above method embodiments, which will not be repeated here.

[0091] It can be understood that the above scenarios are only examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of the present application. The technical solutions of the present application can also be applied to other scenarios. For example, those skilled in the art can know that, as the system architecture evolves and new business scenarios emerge, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0092] The above sequence numbers of the embodiments of the present application are only for description and do not represent the advantages and disadvantages of the embodiments.

[0093] The units in the device of the embodiments of the present application can be combined, divided and deleted according to actual needs.

[0094] In the present application, for the same or similar term concept, technical solution and / or application scenario description, generally only the first time is described in detail, and for the sake of brevity, the repeated description is not repeated. When understanding the technical solutions and the like of the present application, the same or similar term concept, technical solution and / or application scenario description and the like which are not described in detail later can refer to the related description before.

[0095] In the present application, the description of each embodiment has its own focus, and the parts not described or recorded in a certain embodiment can refer to the related description of other embodiments.

[0096] The technical features of the technical solutions of the present application can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of these technical features does not exist contradictory, it should be considered as the range recorded in the present application.

[0097] The above is only the preferred embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A radio frequency transceiver apparatus, characterized by, The radio frequency transceiver device comprises a wireless chip, an amplification circuit and a WiFi antenna, the amplification circuit is electrically connected between the wireless chip and the WiFi antenna; The amplification circuit comprises a low noise amplifier and a control switch, the control switch has a transmitting end, a receiving end and an antenna end, the transmitting end is electrically connected with a signal output port of the wireless chip, the receiving end is electrically connected with an input end of the low noise amplifier, the antenna end is electrically connected with the WiFi antenna, and an output end of the low noise amplifier is electrically connected with a signal input port of the wireless chip; The low noise amplifier is configured to amplify the received radio frequency signal and transmit the amplified radio frequency signal to the signal input port of the wireless chip through the control switch.

2. The radio frequency transceiver device of claim 1, wherein, The amplification circuit further comprises a bypass switch, and the bypass switch is arranged in parallel with the low noise amplifier; When the strength of the radio frequency signal is higher than a threshold value, the control switch is conducted through the bypass switch and the signal input port of the wireless chip.

3. The radio frequency transceiver device of claim 1, wherein, The radio frequency transceiver device further comprises a filter, and the filter is electrically connected between the antenna end of the control switch and the WiFi antenna, so that the wireless signal of the target frequency band is transmitted to the wireless chip.

4. The radio frequency transceiver device of claim 1, wherein, The amplification circuit comprises at least two, and the two amplification circuits are used for processing WiFi signals of different frequency bands.

5. The radio-frequency transceiver device according to any one of claims 1 to 4, characterized in that, The signal input port of the wireless chip comprises a first sub-input port and a second sub-input port, the signal output port comprises a first sub-output port and a second sub-output port, the WiFi antenna comprises a first antenna, the amplification circuit comprises a first sub-circuit and a second sub-circuit, the control switch comprises a first sub-switch and a second sub-switch, and the low noise amplifier comprises a first sub-amplifier and a second sub-amplifier; the radio frequency transceiver device comprises at least one of the following: The first sub-output port is electrically connected with the transmitting end of the first sub-switch, the antenna end of the first sub-switch is electrically connected with the first antenna, and the first sub-switch is used for transmitting WiFi signals of a 2.4 GHz frequency band; The second sub-output port is electrically connected with the transmitting end of the second sub-switch, the antenna end of the second sub-switch is electrically connected with the first antenna, and the second sub-switch is used for transmitting WiFi signals of a 5 GHz frequency band; The receiving end of the first sub-switch is electrically connected with the input end of the first sub-amplifier, and the output end of the first sub-amplifier is electrically connected with the first sub-input port, so as to receive WiFi signals of a 2.4 GHz frequency band; The first antenna is electrically connected with the antenna end of the second sub-switch, the receiving end of the second sub-switch is electrically connected with the input end of the second sub-amplifier, and the output end of the second sub-amplifier is connected with the second sub-input port, so as to receive WiFi signals of a 5 GHz frequency band.

6. The radio frequency transceiver device of claim 5, wherein, The radio frequency transceiver device further comprises a first combiner, the combiner comprises a first end, a second end and a third end, the first end of the first combiner is electrically connected with the antenna end of the first sub-switch, the second end of the first combiner is electrically connected with the antenna end of the second sub-switch, the third end of the first combiner is electrically connected with the first antenna, and the first combiner is configured to combine signals of different frequency bands to the first antenna.

7. The radio-frequency transceiver device according to any one of claims 1 to 4, characterized in that, The signal input port of the wireless chip includes a third sub-input port and a fourth sub-input port, the signal output port includes a third sub-output port and a fourth sub-output port, the amplification circuit includes a third sub-circuit and a fourth sub-circuit, the control switch includes a third sub-switch and a fourth sub-switch, the low-noise amplifier further includes a third sub-amplifier and a fourth sub-amplifier, and the WiFi antenna further includes a second antenna; the radio frequency transceiver device includes at least one of the following: The third sub-output port is electrically connected with the transmitting end of the third sub-switch, the antenna end of the third sub-switch is electrically connected with the second antenna, and the third sub-switch is used for transmitting a WiFi signal of a 2.4 GHz frequency band; The fourth sub-output port is electrically connected with the transmitting end of the fourth sub-switch, the antenna end of the fourth sub-switch is electrically connected with the second antenna, and the fourth sub-switch is used for transmitting a WiFi signal of a 5 GHz frequency band; The receiving end of the third sub-switch is electrically connected with the input end of the third sub-amplifier, the output end of the third sub-amplifier is electrically connected with the third sub-input port, and the third sub-amplifier is used for receiving a WiFi signal of a 2.4 GHz frequency band; The second antenna is electrically connected with the antenna end of the fourth sub-switch, the receiving end of the fourth sub-switch is electrically connected with the input end of the fourth amplifier, and the output end of the fourth sub-amplifier is connected with the fourth sub-input port, and the fourth sub-amplifier is used for receiving a WiFi signal of a 5 GHz frequency band.

8. The radio frequency transceiver device of claim 7, wherein, The radio frequency transceiver device further includes a second combiner, the second combiner has a fourth end, a fifth end and a sixth end, the fourth end of the second combiner is electrically connected with the antenna end of the third sub-switch, the fifth end of the second combiner is electrically connected with the antenna end of the fourth sub-switch, the sixth end of the second combiner is electrically connected with the second antenna, and the second combiner is used for combining signals of different frequency bands to the second antenna.

9. A smart terminal, characterized by The radio frequency transceiver device includes any one of claims 1-8.

10. The intelligent terminal of claim 9, wherein, Further comprising a mainboard and a metal frame, the metal frame is arranged on the outer circumferential side of the mainboard, the wireless chip and the amplification circuit are arranged on the mainboard, and at least part of the metal frame is the WiFi antenna.

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