CN110190916B

CN110190916B - Power detection circuit and terminal

Info

Publication number: CN110190916B
Application number: CN201910339966.0A
Authority: CN
Inventors: 韦仁杰
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-04-25
Filing date: 2019-04-25
Publication date: 2021-03-23
Anticipated expiration: 2039-04-25
Also published as: WO2020216178A1; CN110190916A

Abstract

The embodiment of the invention discloses a power detection circuit and a terminal, wherein the power detection circuit comprises: the system comprises a radio frequency transceiving module, a radio frequency front-end module connected with the radio frequency transceiving module, a first switch module, a second switch module and a directional coupler; the radio frequency front end module comprises at least one receiving submodule and at least one transmitting submodule; the at least one receiving submodule is switchably connected with the at least two antennas of the terminal through the first switch module; the first switch module is connected with the second switch module through the directional coupler; the at least one transmitting submodule is switchably connected with the first end of the directional coupler through the second switch module, and the second end of the directional coupler is switchably connected with the at least two antennas; and the third end of the directional coupler is connected with the radio frequency transceiving module. The area of the power detection circuit layout can be reduced by utilizing the embodiment of the invention.

Description

Power detection circuit and terminal

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a power detection circuit and a terminal.

Background

In recent years, Multiple-Input Multiple-Output (MIMO) systems have become one of the important guarantee means for the performance of wireless communication systems, and are widely applied to various wireless communication systems and communication standards, especially to the fifth-Generation (5G) mobile communication technology and various types of communication terminals.

At present, in a scenario of performing power detection in a non-independent Network (NSA) of a 5G network, in order to ensure normal use of a user, a terminal needs to perform power detection on transmission power, and a main implementation manner is to provide a signal detection module on a path connected to each antenna so as to measure the signal transmission power on each path, so that free switching between multiple antennas can be supported, and transmission power on each path can be measured at the same time.

However, with the trend of smaller and smaller terminal sizes, the layout design requirements for signal detection, power detection, and the like are higher and higher, and the existing design cannot meet the application requirements.

Disclosure of Invention

Embodiments of the present invention provide a power detection circuit and a terminal, which can reduce the area of a layout of the power detection circuit to a certain extent while supporting free switching among a plurality of antennas.

In order to solve the technical problem, the invention is realized as follows:

in a first aspect, an embodiment of the present invention provides a power detection circuit applied to a terminal, where the circuit includes:

the system comprises a radio frequency transceiving module, a radio frequency front-end module connected with the radio frequency transceiving module, a first switch module, a second switch module and a directional coupler;

the radio frequency front end module comprises at least one receiving submodule and at least one transmitting submodule;

the at least one receiving submodule is switchably connected with the at least two antennas of the terminal through the first switch module;

the first switch module is connected with the second switch module through the directional coupler;

the at least one transmitting submodule is switchably connected with the first end of the directional coupler through the second switch module, and the second end of the directional coupler is switchably connected with the at least two antennas; and the third end of the directional coupler is connected with the radio frequency transceiving module.

In a second aspect, an embodiment of the present invention provides a terminal, which includes the power detection circuit as shown in the first aspect.

In the embodiment of the invention, when the terminal is actually used, the free switching among a plurality of antennas is supported, the power calling accuracy is ensured, and in addition, the problems of reducing the layout area of the power detection circuit and reducing the cost while supporting the free switching among the plurality of antennas are solved.

Drawings

The present invention will be better understood from the following description of specific embodiments thereof taken in conjunction with the accompanying drawings, in which like or similar reference characters designate like or similar features.

FIG. 1 is a circuit for power detection in NSA mode;

FIG. 2 is another circuit for power detection in NSA mode;

fig. 3 is a circuit structure diagram of a power detection circuit according to an embodiment of the present invention;

fig. 4 is a first circuit structure diagram of a power detection circuit according to an embodiment of the present invention;

fig. 5 is a second circuit structure diagram of a power detection circuit according to an embodiment of the present invention;

fig. 6 is a third circuit structure diagram of a power detection circuit according to an embodiment of the present invention;

fig. 7 is a schematic diagram of a hardware structure of a terminal according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Currently, two networking methods are adopted in a 5G network: independent networking (standalon, SA) and Non-independent Networking (NSA). The two have different requirements on technical requirements and implementation modes, and for example, in an NSA mode, the following technical conditions need to be satisfied:

1. long Term Evolution (LTE) and 5G New air interface (New Radio, NR) communicate based on a dual connection mode, that is, an LTE frequency band and an NR frequency band can work simultaneously.

Here, when LTE is operating independently, dual-antenna or multi-antenna switching and the capability of 4 × 4 MIMO supporting downlink reception may also be supported.

2. The 5G NR frequency band needs to support a 1-transmission 4-reception (1T4R) channel Sounding Reference Signal (SRS) antenna alternate transmission technology.

Here, in the antenna supporting 1T4R, TRx is a main transceiver signal, and the other three Rx paths are auxiliary receiving signals, and in actual use, the terminal should regulate and control the transmission power to ensure that the TRx antenna has the best performance, so as to ensure the best experience of the user.

Fig. 1 and 2 show a current power detection circuit based on NSA mode. As shown in fig. 1, the method specifically includes: a radio frequency transceiver module (e.g., a radio frequency transceiver), an LTE radio frequency front end module 10, an NR radio frequency front end module 11, a first switch module of 4P4T (e.g., P1-P4 port and T1-T4 port in fig. 1), a second switch module of 4P4T, and a signal detection module. The LTE rf front-end module 10 and the NR rf front-end module 11 are designed with 4 antennas, respectively.

Specifically, the radio frequency transceiver module is connected to 4 first ports of the switch module of the first 4P4T in a one-to-one correspondence manner through 4 sub-modules in the LTE radio frequency front-

end module

10, and 4 second ports of the switch module of the first 4P4T are used for being connected to 4 first antennas in the terminal in a one-to-one correspondence manner; and a signal detection module is arranged on a connecting path of each second port and the antenna.

The radio frequency transceiving module is connected with 4 first ports in a switch module of the second 4P4T in a one-to-one correspondence manner through 4 sub-modules in the NR radio frequency front-

end module

11, and 4 second ports in the switch module of the second 4P4T are used for being connected with 4 second antennas in the terminal in a one-to-one correspondence manner; and a signal detection module is arranged on a connecting path of each second port and the antenna.

The signal detection module comprises a directional coupler. In addition, the directional coupler is also used to connect with an SP8T rf switch, and the SP8T rf switch is connected with the rf transceiver module, so as to transmit the transmission signal on each antenna to the rf transceiver module 10.

Based on the structure, the 4 × 4 MIMO that the LTE frequency band can realize downlink reception through the 4 antennas can be ensured, and the free switching of the LTE transmission (Tx) signal among the 4 LTE antennas can be realized through the switch module.

Similarly, the NR frequency band may be 1T4R through 4 antennas, and may also be switched between 4 NR antennas through a switch module of 4P4T, that is, an SRS antenna transmission technology.

Since, while the TX power is detected, the free switching between the four antennas is also achieved. Therefore, only one directional coupler is needed on each path of path to realize power detection and ensure accuracy of power calling, and here, 8 antennas as shown in fig. 1 need to correspond to eight directional couplers to meet the requirement.

As shown in fig. 2, another power detection circuit based on the NSA mode specifically includes: the radio frequency transceiver module, the LTE radio frequency front end module 20, the NR radio frequency front end module 21, the first 4P4T switch module, the second 4P4T switch module, and the signal detection module. The connection relationship of the circuit is different from that of fig. 1 in that the signal detection module includes a combiner and a directional coupler. The combiner may connect one sub-module of the LTE rf front-end module 20 and one sub-module of the NR rf front-end module 21 to 1 antenna. Thus, each of the 4 antennas corresponds to a directional coupler, the 4 couplers are further configured to be connected to an SP4T rf switch, and the SP4T rf switch is connected to an rf transceiver module, so that the rf transceiver module determines the transmitted signal on each antenna.

Based on the circuit structure, four paths of reception of an LTE frequency band and an NR frequency band can be realized, meanwhile, the LTE can also realize the multi-antenna switching technology of the LTE through the switch module of 4P4T, and the NR can realize the SRS through the switch module of 4P 4T. However, this circuit configuration also requires four directional couplers to complete the power detection.

The configurations of fig. 1 and 2, although power detection may be implemented. However, with the trend of smaller and smaller terminal sizes, the layout area of the power detection circuit is required to be higher and higher. The structure is complex and high in cost, and the requirement of terminal development cannot be met.

Therefore, the embodiment of the invention provides a power detection circuit, so as to reduce the area of the layout of the power detection circuit and reduce the cost while supporting the free switching among a plurality of antennas and ensuring the accuracy of power calling.

As shown in fig. 3, the power detection circuit includes: the system comprises a radio frequency transceiving module, a radio frequency front-end module connected with the radio frequency transceiving module, a first switch module, a second switch module and a directional coupler.

The radio frequency front end module comprises at least one receiving submodule and at least one transmitting submodule.

In the embodiment of the invention, at least one receiving submodule is switchably connected with at least two antennas of the terminal through a first switch module.

The first switch module in the embodiment of the invention is connected with the second switch module through the directional coupler.

In the embodiment of the invention, at least one transmitting submodule is switchably connected with a first end of a directional coupler through a second switch module, and a second end of the directional coupler is switchably connected with at least two antennas; and the third end of the directional coupler is connected with the radio frequency transceiving module.

The power detection circuit in the embodiment of the invention realizes the 4 x 4 MIMO of the downlink of LTE or NR by improving the switch module based on the NSA mode, and can reduce the number of design of directional couplers and reduce the cost under the condition of multi-antenna switching.

The radio frequency front end module comprises an NR radio frequency front end module and/or an LTE radio frequency front end module. Further, at least one of the transmitting sub-modules is an NR radio frequency front end module or an LTE radio frequency front end module; at least one receiving submodule is an NR radio frequency front end module or an LTE radio frequency front end module.

Based on the structure shown in fig. 3, the signal on each antenna is coupled to the inside of the rf transceiver module through the directional coupler, as shown in table 1, the rf transceiver module converts different powers into power detection values corresponding to different Digital-to-Analog converters (ADCs), and stores the correspondence between the powers and the power detection values in the terminal, so that the terminal can invoke different power levels (rgi), which is called power detection. Rgi is the power level of the RF transceiver module; the power detection value is converted into a corresponding ADC value according to the power fed back to the radio frequency transceiver module by the current power. For example, as shown in the second row of table 1, assuming that the terminal currently transmits 27.7dbm of power, the ADC converts the corresponding power detection value to a value in the middle of 45011-47253, and the rf transceiver module determines rgi of the transmitted power level to be 71, which is a process of power detection.

TABLE 1

Thus, based on the power detection structure as shown in fig. 3, the present embodiment provides 3 specific embodiments for detailed description.

Example 1:

fig. 4 is a first circuit structure diagram of a power detection circuit according to an embodiment of the present invention.

As shown in fig. 4, RX of LTE, NR is connected to the first switch module, and TRX of LTE, NR is connected to the second switch module. And the first switch module and the second switch module are connected with the 4 antennas in a switchable manner by controlling the directional coupler of the port 7, so that the TRX can be freely switched among the four antennas, and meanwhile, the power detection is completed.

The power detection circuit in the embodiment of the invention comprises: the system comprises a radio frequency transceiving module, a radio frequency front-end module connected with the radio frequency transceiving module, a first switch module, a second switch module and a directional coupler;

the radio frequency front end module comprises 6 receiving sub-modules (namely 3 NR Rx modules and 3 LTE modules) and 4 transceiving sub-modules (namely 3 NRTRx modules and 1 LTE TRx modules). Here, the following is explained in the nomenclature for TRx module: the TRx module is a transceiver module in application, and can receive signals and transmit signals. Since the embodiment of the present invention only needs to measure the power of the transmission signal, when the transmission function in the transceiver module is utilized, the TRx module name can be classified into only the transmission sub-module. On the contrary, if the terminal does not perform power detection on the transmitted signal, the TRx module is taken as a receiving sub-module, and the TRx module can be classified as the receiving sub-module, where the connection mode of the TRx module refers to the connection mode of the receiving sub-module and the antenna being consistent.

Further, the 6 receiving sub-modules are switchably connected with the 4 antennas of the terminal through the first switch module.

The first switch module is connected with the second switch module through the directional coupler.

The 4 transceiver sub-modules are switchably connected with the first end of the directional coupler through the second switch module, and the second end of the directional coupler is switchably connected with the 4 antennas; and the third end of the directional coupler is connected with the radio frequency transceiving module.

Based on the structure shown in fig. 4, the power detection circuit is implemented as follows:

(1) the LTE implementation mode is as follows:

when the transceiver sub-module LTE TRx module transmits signals through the antenna 1, the terminal controls the port 4 of the second switch module to be connected to one end of the directional coupler and controls the other end of the directional coupler of the first switch module to be connected with the port 11, and therefore power detection of TX can be achieved when the LTE TRx module transmits signals through the antenna 1.

When the transceiver sub-module LTE TRx module transmits signals through the antenna 2, the terminal controls the port 4 of the second switch module to be connected to one end of the directional coupler and controls the other end of the directional coupler of the first switch module to be connected with the port 10, and therefore power detection of TX can be achieved when the LTE TRx module transmits signals through the antenna 2.

When the transceiver sub-module LTE TRx module transmits signals through the antenna 3, the terminal controls the port 4 of the second switch module to be connected to one end of the directional coupler and controls the other end of the directional coupler of the first switch module to be connected with the port 9, and therefore power detection of TX can be achieved when the LTE TRx module transmits signals through the antenna 3.

When the transceiver sub-module LTE TRx module transmits signals through the antenna 4, the terminal controls the port 4 of the second switch module to be connected to one end of the directional coupler and controls the other end of the directional coupler of the first switch module to be connected with the port 8, and therefore power detection of TX can be achieved when the LTE TRx module transmits signals through the antenna 4.

It will be appreciated that when the transceiver sub-module is connected to one of the plurality of antennas by a directional coupler, the receiving module may be switchably connected to antennas other than the antenna to which the directional coupler is connected, so that signals are received by the receiving module while detecting the transmit power.

Therefore, the receiving and transmitting sub-module can realize power detection through any antenna, and meanwhile, the structure reduces the number of designed directional couplers, reduces the area of a power detection circuit and reduces the manufacturing cost.

(2) NR implementation:

when any one transceiver sub-module (such as NR TRx1 module) is selected from the 3 transceiver sub-modules, and the NR TRx1 module transmits signals through the antenna 1, the terminal controls the port 1 of the second switch module to be connected to one end of the directional coupler, and controls the other end of the first switch module to be connected with the port 11, so that the power detection of TX can be realized when the NR TRx1 module transmits signals through the antenna 1.

When the transceiver sub-module NR TRx1 module transmits a signal through the antenna 2, the terminal controls the port 1 of the second switch module to be connected to one end of the directional coupler, and controls the other end of the directional coupler to be connected to the port 10 of the first switch module, so that the power detection of TX can be realized when the NR TRx1 module transmits a signal through the antenna 2.

When the transceiver sub-module NR TRx1 module transmits a signal through the antenna 3, the terminal controls the port 1 of the second switch module to be connected to one end of the directional coupler, and controls the other end of the directional coupler to be connected to the port 9 of the first switch module, so that the power detection of TX can be realized when the NR TRx1 module transmits a signal through the antenna 3.

When the transceiver sub-module LTENR TRx1 module transmits signals through the antenna 4, the terminal controls the port 1 of the second switch module to be connected to one end of the directional coupler and controls the other end of the directional coupler to be connected with the port 8 of the first switch module, and therefore power detection of TX can be achieved when the NR TRx1 module transmits signals through the antenna 4.

Similarly, the NRTRx2 module and the NR TRx3 module can realize power detection through any antenna according to the above formula, and the structure reduces the number of directional coupler designs, reduces the area of a power detection circuit, and reduces the manufacturing cost.

Example 2:

fig. 5 is a diagram illustrating a second circuit structure of a power detection circuit according to an embodiment of the present invention.

The difference from embodiment 1 is that the position of the directional coupler, in one example, as shown in fig. 4, is integrated in the first switch module. Of course, in another example (not shown in the figures), the position of the directional coupler can also be integrated in the second switch module.

Example 3:

fig. 6 shows a third circuit structure diagram of a power detection circuit according to an embodiment of the present invention.

The difference from the embodiment 1 is that the positions of the transmitting submodule, the second switch module and the directional coupler in the radio frequency front-end module are changed. Specifically, at least one transmitting submodule, the second switch module and the directional coupler in the radio frequency front-end module are integrated in the first switch module, so that the area of the power detection circuit is reduced, and the manufacturing cost is reduced.

Therefore, as can be seen from fig. 3 to 6, the position of the directional coupler can be adjusted according to the actual application scenario.

Therefore, in the embodiment of the invention, when the terminal is actually used, the free switching among a plurality of antennas is supported, the power calling accuracy is ensured, and in addition, the problems of reducing the layout area of the power detection circuit and reducing the cost while supporting the free switching among the plurality of antennas are solved.

Fig. 7 is a schematic diagram illustrating a hardware structure of a terminal according to an embodiment of the present invention.

The mobile terminal 700 includes, but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, a processor 710, a power supply 711, and the like. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 7 is not intended to be limiting of mobile terminals, and that a mobile terminal may include more or fewer components than shown, or some components may be combined, or a different arrangement of components. In the embodiment of the present invention, the mobile terminal includes, but is not limited to, a mobile phone, a tablet computer, a notebook computer, a palm computer, a vehicle-mounted terminal, a wearable device, a pedometer, and the like.

The radio frequency unit 701 includes any one of the power detection circuits provided in the embodiments of the present invention, so as to solve the problems of reducing the area of the layout of the power detection circuit and reducing the cost while supporting free switching among a plurality of antennas.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 701 may be used for receiving and sending signals during a message transmission and reception process or a call process, and specifically, receives downlink resources from a base station and then processes the received downlink resources to the processor 710; in addition, the uplink resource is transmitted to the base station. In general, radio frequency unit 701 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 701 may also communicate with a network and other devices through a wireless communication system.

The mobile terminal provides the user with wireless broadband internet access via the network module 702, such as helping the user send and receive e-mails, browse web pages, and access streaming media.

The audio output unit 703 may convert an audio resource received by the radio frequency unit 701 or the network module 702 or stored in the memory 709 into an audio signal and output as sound. Also, the audio output unit 703 may also provide audio output related to a specific function performed by the mobile terminal 700 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 703 includes a speaker, a buzzer, a receiver, and the like.

The input unit 704 is used to receive audio or video signals. The input Unit 704 may include a Graphics Processing Unit (GPU) 7041 and a microphone 7042, and the Graphics processor 7041 processes image resources of still pictures or videos 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 707. The image frames processed by the graphic processor 7041 may be stored in the memory 709 (or other storage medium) or transmitted via the radio unit 701 or the network module 702. The microphone 7042 may receive sound and may be capable of processing such sound into an audio asset. The processed audio resources may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 701 in case of a phone call mode.

The mobile terminal 700 also includes at least one sensor 705, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 7061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 7061 and/or a backlight when the mobile terminal 700 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), detect the magnitude and direction of gravity when stationary, and can be used to identify the posture of the mobile terminal (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), and vibration identification related functions (such as pedometer, tapping); the sensors 705 may also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, infrared sensors, etc., which are not described in detail herein.

The display unit 706 is used to display information input by the user or information provided to the user. The Display unit 706 may include a Display panel 7061, and the Display panel 7061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.

The user input unit 707 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 707 includes a touch panel 7071 and other input devices 7072. The touch panel 7071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 7071 (e.g., operations by a user on or near the touch panel 7071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 7071 may include two parts of a touch detection device and a touch controller. The touch detection device detects the touch direction of a 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 sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 710, receives a command from the processor 710, and executes the command. In addition, the touch panel 7071 can be implemented by various types such as resistive, capacitive, infrared, and surface acoustic wave. The user input unit 707 may include other input devices 7072 in addition to the touch panel 7071. In particular, the other input devices 7072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, and a joystick, which are not described herein again.

Further, the touch panel 7071 may be overlaid on the display panel 7061, and when the touch panel 6071 detects a touch operation on or near the touch panel 7071, the touch operation is transmitted to the processor 710 to determine the type of the touch event, and then the processor 710 provides a corresponding visual output on the display panel 7061 according to the type of the touch event. Although the touch panel 7071 and the display panel 7061 are shown in fig. 7 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 7071 and the display panel 7061 may be integrated to implement the input and output functions of the mobile terminal, which is not limited herein.

The interface unit 708 is an interface through which an external device is connected to the mobile terminal 700. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charger) port, a wired or wireless resource 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 708 may be used to receive input (e.g., resource information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 700 or may be used to transmit resources between the mobile terminal 700 and external devices.

The memory 709 may be used to store software programs and various resources. The memory 709 may mainly include a storage program area and a storage resource area, where the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required by at least one function, and the like; the storage resource area may store resources (such as audio resources, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 709 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 710 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 and processing resources of the mobile terminal by operating or executing software programs and/or modules stored in the memory 709 and calling resources stored in the memory 709, thereby performing overall monitoring of the mobile terminal. Processor 710 may include one or more processing units; preferably, the processor 710 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 710.

The mobile terminal 700 may also include a power supply 711 (e.g., a battery) for powering the various components, and the power supply 711 may be logically coupled to the processor 710 via a power management system that may enable managing charging, discharging, and power consumption by the power management system.

In addition, the mobile terminal 700 includes some functional modules that are not shown, and thus will not be described in detail herein.

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, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A power detection circuit for a terminal, comprising: the system comprises a radio frequency transceiving module, a radio frequency front-end module connected with the radio frequency transceiving module, a first switch module, a second switch module and a directional coupler;

the radio frequency front end module comprises at least one receiving submodule and a plurality of transceiving submodules;

the at least one receiving submodule is switchably connected with at least two antennas of the terminal through the first switch module;

the plurality of transceiver sub-modules are switchably connected with the first end of the directional coupler through the second switch module, and the second end of the directional coupler is switchably connected with the at least two antennas; the third end of the directional coupler is connected with the radio frequency transceiving module;

the directional coupler is integrated in the first switch module or in the second switch module.

2. The circuit of claim 1, wherein the at least one transceiver sub-module, the second switch module, and the directional coupler are integrated into the first switch module.

3. The circuit of claim 1, wherein a first transmit sub-module of the at least one transceiver sub-module is connected to a first antenna of the at least two antennas via the directional coupler when the first transmit sub-module transmits a signal via the first antenna.

4. The circuit of claim 1, wherein the number of transceiver sub-modules is at least 4 and the number of receiver sub-modules is at least 6.

5. The circuit of claim 4, wherein the number of antennas is at least 4.

6. The circuit according to any of claims 1-5, wherein the RF front-end module comprises a New air interface (NR) RF front-end module and/or a Long Term Evolution (LTE) RF front-end module.

7. A terminal, comprising: the power detection circuit of any of claims 1-6.