CN220421813U

CN220421813U - Radio frequency circuit and intelligent terminal

Info

Publication number: CN220421813U
Application number: CN202321824473.4U
Authority: CN
Inventors: 刘超; 滕帅
Original assignee: Shenzhen Taihengnuo Technology Co ltd
Current assignee: Shenzhen Taihengnuo Technology Co ltd
Priority date: 2023-07-11
Filing date: 2023-07-11
Publication date: 2024-01-30
Anticipated expiration: 2033-07-11

Abstract

The application provides a radio frequency circuit and an intelligent terminal, wherein the radio frequency circuit comprises a first transmitting path, a second transmitting path and a transceiver, the transceiver is connected with the first transmitting path to transmit a transmitting signal of a first system, and the transceiver is connected with the second transmitting path to transmit a transmitting signal of a second system; the first transmission path comprises a first duplexer, the second transmission path comprises a second duplexer, and the radio frequency circuit further comprises a first low-noise amplifier; the transceiver is connected with the first duplexer through the first low-noise amplifier so as to receive a received signal of a first frequency band or a second frequency band; the transceiver is connected with the second duplexer through the first low-noise amplifier so as to receive a received signal of a first frequency band or a second frequency band. Based on a separation architecture, the four-way multiplexer used in the LTE CA combined communication architecture is replaced by two diplexers, so that the circuit design is simplified, and the product cost is reduced.

Description

Radio frequency circuit and intelligent terminal

Technical Field

The application relates to the technical field of wireless communication, in particular to a radio frequency circuit and an intelligent terminal.

Background

In the technical field of wireless communication, 4G communication and 5G communication have become the mainstream systems of communication. When the LTE CA combination is effective, the transmitted wireless signal TX is output from the transceiver, amplified by the power amplifier PA, enters a quad-amplifier (Qup), and finally reaches an antenna through an integrated circuit IC (integrated circuit) such as a combiner, a switch and the like to be transmitted finally. The main set received signal PRX is received by an antenna, filtered by a switch, a frequency divider, etc. to a quad-worker (Qup), and then enters the MLNA to finally reach the transceiver. Diversity reception signal DRX then goes through ANT3 antennas into the MLNA to the transceiver.

In the process of designing and implementing the present application, the inventors found that at least the following problems exist: when aiming at LTE CA networking, TX and PRX need to pass through a quadruplex, a frequency divider or a combiner and the like, and pass through more devices, so that the insertion loss is large, and the radio frequency performance is deteriorated; and/or, the price of the quadruplex is relatively high compared with that of a common duplexer, which is unfavorable for large-scale use.

The foregoing description is provided for general background information and does not necessarily constitute prior art.

Disclosure of Invention

Aiming at the technical problems, the application provides a radio frequency circuit and an intelligent terminal, which simplify the design of the existing circuit and reduce the cost.

The application provides a radio frequency circuit which comprises a first transmitting path, a second transmitting path and a transceiver, wherein the transceiver is connected with the first transmitting path to transmit a transmitting signal of a first system, and is connected with the second transmitting path to transmit a transmitting signal of a second system; the first transmission path comprises a first duplexer, the second transmission path comprises a second duplexer, and the radio frequency circuit further comprises a first low-noise amplifier; the transceiver is connected with the first duplexer through the first low-noise amplifier so as to receive a received signal of a first frequency band or a second frequency band; the transceiver is connected with the second duplexer through the first low-noise amplifier so as to receive a received signal of a first frequency band or a second frequency band.

Optionally, the first transmitting path includes a first antenna and a first power amplifier, the first antenna is connected to a first end of the first duplexer, and a second end of the first duplexer is connected to the transceiver through the first power amplifier.

Optionally, the second transmitting path includes a second antenna and a second power amplifier, the second antenna is connected to the first end of the second duplexer, and the second end of the second duplexer is connected to the transceiver through the second power amplifier.

Optionally, the first power amplifier and the first duplexer include multichannel devices, and the second end of the first duplexer is connected to the transceiver through the first power amplifier in a multichannel manner, so that the first transmission path can correspondingly transmit the multiple frequency band signals of the first system.

Optionally, the second power amplifier and the second duplexer include a multichannel device, and the second end of the second duplexer is connected to the transceiver through the second power amplifier in a multichannel manner, so that the second transmitting path can correspondingly transmit the multiple frequency band signals of the second system.

Optionally, the radio frequency circuit further includes a front-end switch module, and the first antenna is connected to the first duplexer through the front-end switch module.

Optionally, the radio frequency circuit further comprises a single pole double throw switch, and the second antenna is connected with the second duplexer through the single pole double throw switch.

Optionally, a first end of the first low-noise amplifier is connected to a third end of the first duplexer, a second end of the first low-noise amplifier is connected to a third end of the second duplexer, and a third end of the first low-noise amplifier is connected to the transceiver.

Optionally, the radio frequency circuit further includes a diversity path, and the diversity path is connected to the transceiver, so as to receive diversity signals of the first system or the second system.

Optionally, the diversity path includes a third antenna and a second low noise amplifier, the third antenna being connected to the transceiver through the second low noise amplifier.

Optionally, the radio frequency circuit further comprises a first band pass filter connected between the first low noise amplifier and the transceiver.

Optionally, the radio frequency circuit further comprises a second bandpass filter connected between the second low noise amplifier and the transceiver.

Optionally, the second band pass filter is connected between the third antenna and the second low noise amplifier.

Optionally, the radio frequency circuit further comprises: and the transceiver receives the received signal of the first frequency band during the signal transmission and reception of the first standard through the first duplexer.

Optionally, the radio frequency circuit further comprises: and the transceiver receives the received signal of the second frequency band during the signal receiving and transmitting of the second standard through the first duplexer.

Optionally, the radio frequency circuit further comprises: and the transceiver receives a received signal of a second frequency band during the signal receiving and transmitting of the first system through the second duplexer.

Optionally, the radio frequency circuit further comprises: and the transceiver receives the received signal of the first frequency band during the signal receiving and transmitting of the second standard through the second multiplexer.

The application also provides an intelligent terminal which can comprise the radio frequency circuit.

As described above, the radio frequency circuit and the intelligent terminal provided by the application are connected with the first transmission path through the transceiver to transmit the transmission signal of the first system, and the transceiver is connected with the second transmission path to transmit the transmission signal of the second system; the first transmission path comprises a first duplexer, the second transmission path comprises a second duplexer, and the radio frequency circuit further comprises a first low-noise amplifier; the transceiver is connected with the first duplexer through the first low-noise amplifier so as to receive the received signal of the second system; the transceiver is connected with the second duplexer through the first low-noise amplifier so as to receive the received signal of the first system. Based on a separation architecture, the four-way multiplexer used in the LTE CA combined communication architecture is replaced by two diplexers, so that the cost can be reduced; and/or the power amplifier path with smaller insertion loss of the transmission signal and the main set receiving signal when the LTE CA is combined with the communication architecture can improve the radio frequency performance.

Drawings

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 present application, the drawings that are needed in the description of the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 is a schematic hardware structure of a mobile terminal implementing various embodiments of the present application;

fig. 2 is a schematic diagram of a communication network system according to an embodiment of the present application;

FIG. 3 is a schematic diagram of an RF circuit architecture according to an embodiment of the present application;

fig. 4 is a schematic diagram of connection of a radio frequency circuit architecture according to an embodiment of the present application.

The realization, functional characteristics and advantages of the present application will be further described with reference to the embodiments, referring to the attached drawings. Specific embodiments thereof have been shown by way of example in the drawings and will herein be described in more detail. These drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.

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 may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the element defined by the phrase "comprising one … …" does not exclude the presence of additional identical elements in a process, method, article, or apparatus that comprises the element, and alternatively, elements having the same name in different embodiments of the present application may have the same meaning or may have different meanings, a particular meaning of which is to be determined by its interpretation in this particular embodiment or further in connection with the context of this particular embodiment.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited by these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope herein. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context. Furthermore, 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" specify the presence of stated features, steps, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, components, items, categories, and/or groups. The terms "or," "and/or," "including at least one of," and the like, as used herein, may be construed as inclusive, or meaning any one or any combination. For example, "including at least one of: A. b, C "means" any one of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; a and B and C ", again as examples," A, B or C "or" A, B and/or C "means" any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; a and B and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.

The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrase "if determined" or "if detected (stated condition or event)" may be interpreted as "when determined" or "in response to determination" or "when detected (stated condition or event)" or "in response to detection (stated condition or event), depending on the context.

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

In the following description, suffixes such as "module", "component", or "unit" for representing elements are used only for facilitating the description of the present application, and are not of specific significance per se. Thus, "module," "component," or "unit" may be used in combination.

The intelligent terminal may be implemented in various forms. For example, the smart terminals described in the present application may include smart terminals such as cell phones, tablet computers, notebook computers, palm computers, personal digital assistants (Personal Digital Assistant, PDA), portable media players (Portable Media Player, PMP), navigation devices, wearable devices, smart bracelets, pedometers, and stationary terminals such as digital TVs, desktop computers, and the like.

The following description will be given taking a mobile terminal as an example, and those skilled in the art will understand that the configuration according to the embodiment of the present application can be applied to a fixed type terminal in addition to elements particularly used for a moving purpose.

Referring to fig. 1, which is a schematic hardware structure of a mobile terminal implementing various embodiments of the present application, the mobile 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. Those skilled in the art will appreciate that the mobile terminal structure shown in fig. 1 is not limiting of the mobile terminal and that the mobile terminal may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.

The following describes the components of the mobile terminal in detail with reference to fig. 1:

the radio frequency unit 101 may be used for receiving and transmitting signals during the information receiving or communication process, specifically, after receiving downlink information of the base station, processing the downlink information by the processor 110; and, the uplink data is transmitted 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, a duplexer, and the like. In addition, the radio frequency unit 101 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol including, but not limited to, GSM (Global System of Mobile communication, global system for mobile communications), GPRS (General Packet Radio Service ), CDMA2000 (Code Division Multiple Access, 2000, CDMA 2000), WCDMA (Wideband Code Division Multiple Access ), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access, time Division synchronous code Division multiple access), FDD-LTE (Frequency Division Duplexing-Long Term Evolution, frequency Division duplex long term evolution), TDD-LTE (Time Division Duplexing-Long Term Evolution, time Division duplex long term evolution), 5G, 6G, and the like.

WiFi belongs to a short-distance wireless transmission technology, and a mobile terminal can help a user to send and receive e-mails, browse web pages, access streaming media and the like through the WiFi module 102, so that wireless broadband Internet access is provided for the user. Although fig. 1 shows a WiFi module 102, it is understood that it does not belong to the necessary constitution of a mobile terminal, and can be omitted entirely as required within a range that does not change the essence of the invention.

The audio output unit 103 may 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 as sound when the mobile terminal 100 is in a call signal reception mode, a talk mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output (e.g., a call signal reception sound, a message reception sound, etc.) related to a specific function performed by the mobile terminal 100. The audio output unit 103 may include a speaker, a buzzer, and the like.

The a/V input unit 104 is used to receive an audio or video signal. The a/V input unit 104 may include a graphics processor (Graphics Processing Unit, GPU) 1041 and a microphone 1042, the graphics processor 1041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphics processor 1041 may 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 phone 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 may be converted into a format output that can be transmitted to the mobile communication base station via the radio frequency unit 101 in the case of a telephone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting the audio signal.

The mobile terminal 100 also 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, optionally, the ambient light sensor may adjust the brightness of the display panel 1061 according to the brightness of ambient light, and the proximity sensor may turn off the display panel 1061 and/or the backlight when the mobile terminal 100 moves to the ear. As one of the motion sensors, the accelerometer sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and direction when stationary, and can be used for applications of recognizing the gesture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; as for other sensors such as fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc. that may also be configured in the mobile phone, the detailed description thereof will be omitted.

The display unit 106 is used to display information input by a user or information provided to the user. The display unit 106 may include a display panel 1061, and the display panel 1061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 107 may be used to receive input numeric or character information and to generate key signal inputs related to user settings and function control of the mobile terminal. Alternatively, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect touch operations thereon or thereabout by a user (e.g., operations of the user on the touch panel 1071 or thereabout by using any suitable object or accessory such as a finger, a stylus, etc.) and drive the corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device and a touch controller. Optionally, the touch detection device detects the touch azimuth of the user, detects a signal brought by touch operation, and transmits the signal to the touch controller; the touch controller receives touch information from the touch detection device, converts it into touch point coordinates, and sends the touch point coordinates to the processor 110, and can receive and execute commands sent from the processor 110. Further, the touch panel 1071 may be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 107 may include other input devices 1072 in addition to the touch panel 1071. Alternatively, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, mouse, joystick, etc., as specifically not limited herein.

Alternatively, the touch panel 1071 may overlay the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or thereabout, the touch panel 1071 is transferred to the processor 110 to determine the type of touch event, and the processor 110 then provides a corresponding visual output on the display panel 1061 according to the type of touch event. Although in fig. 1, the touch panel 1071 and the display panel 1061 are two independent components for implementing the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 may be integrated with the display panel 1061 to implement the input and output functions of the mobile terminal, which is not limited herein.

The interface unit 108 serves as an interface through which at least one external device can be connected with the mobile terminal 100. For example, the external devices may include a wired or wireless headset port, an external power (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 may be used to receive input (e.g., data information, power, etc.) from an external device and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and an external device.

Memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, and alternatively, the storage program area may store an operating system, an application program required for at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, phonebook, etc.) created according to the use of the handset, etc. In addition, memory 109 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device.

The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile 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, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor and a modem processor, the application processor optionally handling mainly an operating system, a user interface, an application program, etc., the modem processor handling mainly wireless communication. It will be appreciated that the modem processor described above may not be integrated into the processor 110.

The mobile terminal 100 may further include a power source 111 (e.g., a battery) for supplying power to the respective components, and preferably, the power source 111 may be logically connected to the processor 110 through a power management system, so as to perform functions of managing charging, discharging, and power consumption management through the power management system.

Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described herein.

In order to facilitate understanding of the embodiments of the present application, a communication network system on which the mobile terminal of the present application is based will be described below.

Referring to fig. 2, fig. 2 is a schematic diagram of a communication network system provided in the embodiment of the present application, where the communication network system is an LTE system of a general mobile communication technology, and the LTE system includes a UE (User Equipment) 201, an e-UTRAN (Evolved UMTS Terrestrial Radio Access Network ) 202, an epc (Evolved Packet Core, evolved packet core) 203, and an IP service 204 of an operator that are sequentially connected in communication.

Alternatively, the UE201 may be the terminal 100 described above, which is not described here again.

The E-UTRAN202 includes eNodeB2021 and other eNodeB2022, etc. Alternatively, the eNodeB2021 may connect with other enodebs 2022 over a backhaul (e.g., X2 interface), the eNodeB2021 is connected to the EPC203, and the eNodeB2021 may provide access for the UE201 to the EPC 203.

EPC203 may include MME (Mobility Management Entity ) 2031, hss (Home Subscriber Server, home subscriber server) 2032, other MMEs 2033, SGW (Serving Gate Way) 2034, pgw (PDN Gate Way) 2035 and PCRF (Policy and Charging Rules Function, policy and tariff function entity) 2036, and so on. Optionally, MME2031 is a control node that handles signaling between UE201 and EPC203, providing bearer and connection management. HSS2032 is used to provide registers to manage functions such as home location registers (not shown) and to hold user specific information about service characteristics, data rates, etc. All user data may be sent through SGW2034 and PGW2035 may provide IP address allocation and other functions for UE201, PCRF2036 is a policy and charging control policy decision point for traffic data flows and IP bearer resources, which selects and provides available policy and charging control decisions for a policy and charging enforcement function (not shown).

IP services 204 may include the internet, intranets, IMS (IP Multimedia Subsystem ), or other IP services, etc.

Although the LTE system is described above as an example, it should be understood by those skilled in the art that the present application is not limited to LTE systems, but may be applied to other wireless communication systems, such as GSM, CDMA2000, WCDMA, TD-SCDMA, 5G, and future new network systems (e.g., 6G), etc.

Based on the above-mentioned mobile terminal hardware structure and communication network system, various embodiments of the present application are presented.

First embodiment

Fig. 3 is a block diagram of a radio frequency circuit architecture according to an embodiment of the present application.

As shown in fig. 3, in an embodiment, the radio frequency circuit includes a first transmission path, a second transmission path, and a transceiver 1, where the transceiver 1 is connected to the first transmission path to transmit a transmission signal of a first system, and the transceiver 1 is connected to the second transmission path to transmit a transmission signal of a second system; the first transmit path comprises a first diplexer 11, the second transmit path comprises a second diplexer 21, and the radio frequency circuit further comprises a first low noise amplifier 22. The transceiver 1 is connected to the first duplexer 11 through the first low noise amplifier 22 to receive a reception signal of a first frequency band or a second frequency band; the transceiver 1 is connected to the second duplexer 21 through the first low noise amplifier 22 to receive a reception signal of a first frequency band or a second frequency band.

Optionally, the duplexer is a different-frequency duplex device, and can be a main accessory of the relay station, so that the transmission signal and the receiving signal are isolated, and the normal operation of both the receiving signal and the transmitting signal can be ensured. The system consists of two groups of band-pass filters with different frequencies, and avoids the transmission of a local transmitting signal to an incorrect receiver. The low noise amplifier is an amplifier with a very low noise figure. Are commonly used as high-frequency or intermediate-frequency preamplifiers for various radio receivers, and as amplification circuits for high-sensitivity electronic detection devices. Where weak signals are amplified, the noise of the amplifier itself may be very disturbing to the signal, and it is therefore desirable to reduce this noise to improve the signal to noise ratio of the output, which can be achieved using a low noise amplifier.

SA and NSA are two different modes of 5G communication networking. SA is an abbreviation of Standalone, a 5G networking mode, meaning "independent networking". The SA networking mode is a core network with a base station. It can be understood that the 5G technology is used from the core network to the base station, and the networking mode has small delay and high network speed. And NSA is also called "non-independent networking". NSA is a one-to-many networking mode, i.e. one core network band with two base stations. The 5G networking is arranged in the 4G infrastructure, and the 4G base station and the 5G base station at the base station side coexist. It can be understood that the 4G core network is kept unchanged, and the 5G network is implemented by changing the base station to the 5G base station.

Optionally, in the networking mode of SA, LTE band 1 or 2 transmission may select the first transmission path; whereas the primary set of receive signals of band 1 may select the first diplexer 11 for transmission to the transceiver 1 via the first low noise amplifier 22, the primary set of receive signals of band 2 may select the second diplexer 21 for transmission to the transceiver 1 via the first low noise amplifier 22.

Optionally, in the networking mode of NSA, LTE band 1 or 2 may select a second transmission path, and LTE band 1 or 2 transmission may select a second transmission path; whereas the main set of receive signals of band 2 may select the first diplexer 11 to transmit to the transceiver 1 via the first low noise amplifier 22, the main set of receive signals of band 1 may select the second diplexer 21 to transmit to the transceiver 1 via the first low noise amplifier 22.

Optionally, the first transmission path further comprises a first antenna 10 connected to the first diplexer 11. Optionally, the second transmit path further comprises a second antenna 20 connected to a second diplexer 21. Illustratively, based on a split architecture design, when LTE CA combining is in effect, the reception goes through two antennas to the transceiver, respectively. The four-way multiplexer used in LTE CA is replaced by two diplexers, so that the device cost is greatly reduced.

Optionally, the first transmit path includes a first antenna 10 and a first power amplifier 13. The first antenna 10 is connected to a first end of the first duplexer 11, and a second end of the first duplexer 11 is connected to the transceiver 1 through the first power amplifier 13.

An antenna is a transducer that converts a guided wave propagating on a transmission line into an electromagnetic wave propagating in an unbounded medium (usually free space) or vice versa. A component for transmitting or receiving electromagnetic waves in a radio device. Engineering systems such as radio communication, broadcasting, television, radar, navigation, electronic countermeasure, remote sensing, radio astronomy and the like all rely on antennas to work when information is transmitted by electromagnetic waves. In addition, in terms of energy transfer with electromagnetic waves, an antenna is also required for energy radiation other than signals. The common antennas are reversible, i.e. the same pair of antennas can be used as both a transmitting antenna and a receiving antenna. A Power Amplifier (PA, abbreviated as "Power Amplifier") refers to an Amplifier that can produce a larger Power output to drive a load under a given distortion rate. Optionally, the third terminal of the first duplexer 11 is connected to the transceiver 1 through said first low noise amplifier 22.

Optionally, the first power amplifier 13 and the first duplexer 11 are multichannel devices, and the second end of the first duplexer 11 is connected to the transceiver 1 through the first power amplifier 13 in a multichannel manner, so that the first transmission path can correspondingly transmit the multiple frequency band signals of the first standard.

Alternatively, referring to fig. 4, when LTE CA combination is active, the original transmit path may be changed to the transmit path where the first power amplifier, such as MMPA, is located, and the received signal may reach the transceiver via two antennas respectively.

Optionally, the radio frequency circuit further includes a front end switch module 12, and the first antenna 10 is connected to the first duplexer 11 through the front end switch module 12.

Alternatively, the front-end switch module may be a TXM switch module. When the mobile NSA networking and LTE CA combining are effective, the LTE frequency band 2 main set receives the signal from the first antenna such as ANT1 antenna, and then passes through the front-end switch module such as TXM switch to the first duplexer 11 for filtering, and then passes through the first low noise amplifier such as MLNA to reach the transceiver.

Optionally, the second transmit path includes a second antenna 20 and a second power amplifier 24. The second antenna 20 is connected to a first end of the second diplexer 21, and a second end of the second diplexer 21 is connected to the transceiver 1 through the second power amplifier 24.

Optionally, referring to fig. 4, when the mobile SA networking and the LTE CA combining are in effect, the LTE band 1 main set receives the signal from the first antenna such as the ANT1 antenna, passes through the front-end switch module such as the TXM switch, filters the signal in the first duplexer, and then passes through the first low noise amplifier such as the MLNA (low noise amplifier) to reach the transceiver.

Optionally, the second power amplifier 24 and the second duplexer 21 are multichannel devices, and the second end of the second duplexer 21 is connected to the transceiver 1 through the second power amplifier 24 in a multichannel manner, so that the second transmitting path can correspondingly transmit the multiple frequency band signals of the second standard.

Optionally, the radio frequency circuit further includes a single pole double throw switch 23, and the second antenna 20 is connected to the second duplexer 21 through the single pole double throw switch 23.

The single-pole double-throw switch consists of a movable end and a fixed end, and is connected with an incoming line of a power supply, namely one end of an incoming call, and is also generally connected with a handle of the switch; the other two ends are the two ends of the power supply output, namely the so-called stationary ends, which are connected with the electric equipment. The power supply can be controlled to output in two different directions. With continued reference to fig. 4, optionally, when NSA combination is in effect, the original path to the quad is changed to duplex and SPDT switches to the respective frequency bands before reaching the antenna.

Optionally, with continued reference to fig. 4, the lte band 2 main set reception enters from a second antenna such as ANT2, passes through a single pole double throw switch such as SPDT to reach a second duplexer such as DUP filtering, and finally enters the transceiver through a first low noise amplifier such as MLNA.

Optionally, a first end of the first low noise amplifier 22 is connected to the third end of the first duplexer 11, a second end of the first low noise amplifier 22 is connected to the third end of the second duplexer 21, and the third end of the first low noise amplifier 22 is connected to the transceiver 1.

Optionally, please continue to refer to fig. 4, when the mobile SA networking and the LTE CA combining are in effect, the LTE band 1 or 2 transmission is sent from the transceiver, amplified by the first power amplifier such as the MMPA (multi-mode multi-frequency power amplifier), reaches the first duplexer DUP (duplex filtering), and then reaches the first antenna such as ANT1 through the front-end switching module such as the TXM (switching device).

Optionally, when the mobile NSA networking, LTE CA combining is active, LTE band 1 or 2 transmissions are sent from the transceiver into a second power amplifier such as ENDC PA for amplification to a second diplexer such as DUP (duplex filtering), and then through a single pole double throw switch such as SPDT to a second antenna such as ANT2.

Optionally, with continued reference to fig. 4, lte band 1 primary set reception enters from a second antenna such as ANT2, passes through a single pole double throw switch such as SPDT to a second duplexer such as DUP filtering, and finally enters the transceiver through a first low noise amplifier such as MLNA.

Optionally, the radio frequency circuit further includes a diversity path, and the diversity path is connected to the transceiver 1, so as to receive diversity signals of the first system or the second system.

Optionally, the diversity path includes a third antenna 30 and a second low noise amplifier 31, and the third antenna 30 is connected to the transceiver 1 through the second low noise amplifier 31.

Optionally, when the mobile SA networking and the LTE CA combining are effective, diversity reception of both LTE band 1 and band 2 enters through the third antenna ANT3 to reach the transceiver through the MLNA.

In the embodiment, on the basis of a design scheme of a separation architecture, the cost can be greatly reduced by replacing one quadruplex with two diplexers; the radio frequency performance can be further improved by the arrangement of the two antennas respectively.

It should be noted that, in the embodiment of the present application, the antenna may include a plurality of radiators, and each radiator may be connected together in a specific structure, for example, a one-line connection, a T-line connection, an L-line connection, or a mountain-line connection. Each radiator connection feed may form a branch together with a Polyimide Film (PI) Film adhesive layer, or may form a branch together with a PI Film adhesive layer. The present application is not limited in this regard. Different branch forms can generate resonance signals with different frequencies, so that the antenna works in different frequency bands.

Optionally, the radio frequency circuit further comprises a first band pass filter connected between the first low noise amplifier and the transceiver. Optionally, the first band pass filter is selected from a band tunable filter, a programmable filter or a generic acoustic surface filter. The first band-pass filter can filter out-of-band interference caused by the reception of a plurality of frequency bands by the 5G radio frequency circuit.

Optionally, the second band pass filter is selected from a band tunable filter, a programmable filter or a generic acoustic surface filter. The second band-pass filter can filter out-of-band interference caused by the reception of a plurality of frequency bands by the 5G radio frequency circuit.

In the diversity receiving path, the band-pass filter is arranged at the front end of the low-noise amplifier, so that the performance requirement on the low-noise amplifier can be reduced, and the system cost is effectively reduced.

Optionally, the radio frequency circuit may further include: the transceiver receives a receiving signal of a first frequency band during the first system transceiver through the first duplexer; and the transceiver receives the received signal of the second frequency band during the second system transceiver through the first duplexer.

With continued reference to fig. 4, in the networking mode of SA, LTE band 1 or 2 transmission may select a first transmission path; whereas the primary set of receive signals of band 1 may select the first diplexer 11 for transmission to the transceiver 1 via the first low noise amplifier 22, the primary set of receive signals of band 2 may select the second diplexer 21 for transmission to the transceiver 1 via the first low noise amplifier 22.

Optionally, the radio frequency circuit may further include: the transceiver receives a receiving signal of a second frequency band during the first system receiving and transmitting through the second duplexer; and the transceiver receives the received signal of the first frequency band during the second system transceiver through the second multiplexer.

With continued reference to fig. 4, optionally, in the networking mode of NSA, LTE band 1 or 2 may select a second transmission path, and LTE band 1 or 2 transmission may select a second transmission path; whereas the main set of receive signals of band 2 may select the first diplexer 11 to transmit to the transceiver 1 via the first low noise amplifier 22, the main set of receive signals of band 1 may select the second diplexer 21 to transmit to the transceiver 1 via the first low noise amplifier 22.

Optionally, the radio frequency circuit of the present application may further obtain a radio frequency working signal mode, where the radio frequency working signal mode is a first system or a second system; the control transceiver is connected with the first duplexer through the first low-noise amplifier so as to receive a received signal of a first frequency band when receiving and transmitting in a first system and receive a received signal of a second frequency band when receiving and transmitting in a second system; and/or controlling the transceiver to be connected with the second duplexer through the first low-noise amplifier so as to receive the received signal of the second frequency band during the first system transceiving and receive the received signal of the first frequency band during the second system transceiving.

Second embodiment

The application also provides an intelligent terminal comprising the radio frequency circuit in any of the above embodiments.

With continued reference to fig. 4, in an embodiment, when the smart terminal is networked with the mobile SA and the LTE CA combination is in effect, the LTE band 1 or 2 transmission is sent from the transceiver, amplified by the MMPA (multi-mode multi-frequency power amplifier), reaches the DUP (duplex filtering), and then reaches the antenna ANT1 through the TXM (switching device). LTE band 1 main set reception enters from the ANT1 antenna through the TXM switch to the duplexer for filtering before reaching the transceiver through the MLNA (low noise amplifier). The LTE frequency band 2 main set is received from the ANT2, reaches the DUP filter through the SPDT, and finally enters the transceiver through the MLNA. In terms of diversity reception, both LTE band 1 and band 2 diversity reception goes through ANT3 into reaching the transceiver through MLNA.

When the mobile NSA networking and LTE CA combining are in effect, the LTE band 1 or 2 transmission is sent from the transceiver, amplified by the ENDC PA, and then reaches the DUP (duplex filtering), and then reaches the antenna ANT2 through the SPDT (single pole double throw switch). The LTE frequency band 2 main set receives signals which enter from an ANT1 antenna, pass through a TXM switch, are filtered by a duplexer, and then reach a transceiver through an MLNA (low noise amplifier); the LTE frequency band 1 main set is received from the ANT2, reaches the DUP filter through the SPDT, and finally enters the transceiver through the MLNA.

In terms of diversity reception, both LTE band 1 and band 2 diversity reception goes through ANT3 into reaching the transceiver through MLNA.

Based on the existing separation architecture design scheme, when the LTE CA combination is effective, the original transmission path is changed into an MMBPA path, and the reception respectively passes through two antennas to reach the transceiver. When the NSA combination is effective, the path of the original walking quadruplex is changed into duplex and SPDT switches of the respective frequency bands, and then the antenna is reached.

It can be understood that the above scenario is merely an example, and does not constitute a limitation on the application scenario of the technical solution provided in the embodiments of the present application, and the technical solution of the present application may also be applied to other scenarios. For example, as one of ordinary skill in the art can know, with the evolution of the system architecture and the appearance of new service scenarios, the technical solutions provided in the embodiments of the present application are equally applicable to similar technical problems.

The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.

The units in the device of the embodiment of the application can be combined, divided and pruned according to actual needs.

In this application, the same or similar term concept, technical solution, and/or application scenario description will generally be described in detail only when first appearing, and when repeated later, for brevity, will not generally be repeated, and when understanding the content of the technical solution of the present application, etc., reference may be made to the previous related detailed description thereof for the same or similar term concept, technical solution, and/or application scenario description, etc., which are not described in detail later.

In this application, the descriptions of the embodiments are focused on, and the details or descriptions of one embodiment may be found in the related descriptions of other embodiments.

The technical features of the technical solutions of the present application may be arbitrarily combined, and for brevity of description, all possible combinations of the technical features in the above embodiments are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the present application.

The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.

Claims

1. The radio frequency circuit is characterized by comprising a first transmission path, a second transmission path and a transceiver, wherein the transceiver is connected with the first transmission path to transmit a transmission signal of a first system, and is connected with the second transmission path to transmit a transmission signal of a second system;

the first transmission path comprises a first duplexer, the second transmission path comprises a second duplexer, and the radio frequency circuit further comprises a first low-noise amplifier;

the transceiver is connected with the first duplexer through the first low-noise amplifier so as to receive a received signal of a first frequency band or a second frequency band;

The transceiver is connected with the second duplexer through the first low-noise amplifier so as to receive a received signal of a first frequency band or a second frequency band.

2. The radio frequency circuit of claim 1, wherein the first transmit path comprises a first antenna and a first power amplifier, the first antenna connected to a first end of the first duplexer, a second end of the first duplexer connected to the transceiver through the first power amplifier; and/or the number of the groups of groups,

the second transmitting path comprises a second antenna and a second power amplifier, the second antenna is connected with the first end of the second duplexer, and the second end of the second duplexer is connected with the transceiver through the second power amplifier.

3. The radio frequency circuit of claim 2, wherein the first power amplifier and the first diplexer comprise a multi-channel device, a second end of the first diplexer being multi-channel connected to the transceiver through the first power amplifier to cause the first transmit path to transmit at least two frequency band signals of the first format; and/or the number of the groups of groups,

the second power amplifier and the second diplexer comprise the multichannel device, and the second end of the second diplexer is connected with the transceiver through the second power amplifier multichannel, so that the second transmitting path transmits at least two frequency band signals of the second standard.

4. The radio frequency circuit of claim 2, further comprising a front-end switch module, the first antenna being connected to the first diplexer through the front-end switch module; and/or the number of the groups of groups,

the radio frequency circuit further comprises a single-pole double-throw switch, and the second antenna is connected with the second duplexer through the single-pole double-throw switch.

5. The radio frequency circuit of any of claims 1-4, wherein a first end of the first low noise amplifier is connected to a third end of the first duplexer, a second end of the first low noise amplifier is connected to a third end of the second duplexer, and a third end of the first low noise amplifier is connected to the transceiver.

6. The radio frequency circuit of any of claims 1-4, further comprising a first band pass filter connected between the first low noise amplifier and the transceiver; and/or the radio frequency circuit further comprises a diversity path, and the diversity path is connected with the transceiver to receive diversity signals of a first system or a second system.

7. The radio frequency circuit of claim 6, wherein the diversity path includes a third antenna and a second low noise amplifier, the third antenna being connected to the transceiver through the second low noise amplifier.

8. The radio frequency circuit of claim 7, further comprising a second bandpass filter connected between the second low-noise amplifier and the transceiver; and/or the second band-pass filter is connected between the third antenna and the second low-noise amplifier.

9. The radio frequency circuit of any of claims 1 to 4, further comprising at least one of:

the transceiver receives the received signal of the first frequency band during the signal receiving and transmitting of the first standard through the first duplexer;

the transceiver receives the receiving signal of the second frequency band during the signal receiving and transmitting of the second system through the first duplexer;

the transceiver receives the received signal of the second frequency band during the signal receiving and transmitting of the first system through the second duplexer;

and the transceiver receives the received signal of the first frequency band during the signal receiving and transmitting of the second standard through the second multiplexer.

10. An intelligent terminal comprising a radio frequency circuit as claimed in any one of claims 1 to 9.