CN110166146A - A kind of power-sensing circuit and terminal - Google Patents

Abstract

The embodiment of the present invention discloses a power detection circuit and a terminal, including: the radio frequency transceiver module is connected to the first switch module through the first radio frequency front-end module, and the first switch module is connected to at least two antennas; the first switch module The group includes a first branch provided with a first directional coupler and a plurality of second branches; the first directional coupler is connected to the radio frequency transceiver module; the first radio frequency front-end module includes a transmitting submodule and a receiving submodule; One end of the first branch is used to be connected to one transmitting submodule; or, switchably connected to multiple transmitting submodules; the other end of the first branch is used to switchably connect to at least two antennas; the second branch One end of the branch is used to be connected to one receiving submodule, or to be switchably connected to multiple receiving submodules; the other end of the second branch is used to be switchably connected to at least two antennas. The layout area of the power detection circuit can be reduced by using the embodiments of the present invention.

Description

A power detection circuit and terminal

technical field

The embodiments of the present invention relate to the technical field of communications, and in particular, to a power detection circuit and a terminal.

Background technique

In recent years, multiple-input multiple-output system (Multiple-Input Multiple-Output, MIMO) has become one of the important means of guaranteeing the performance of wireless communication systems, and is widely used in various wireless communication systems and communication standards, especially in the fifth generation mobile Communication technology (5th-Generation, 5G) and various types of communication terminals.

At present, in the power detection scenario in the non-standalone (NSA) of the 5G network, in order to ensure the normal use of the user, the terminal needs to perform power detection on the transmission power. The main implementation method is to connect to each antenna A signal detection module is set on the path to measure the signal transmission power on each path, which can support free switching between multiple antennas, and can measure the transmission power on each path at the same time.

However, with the trend of smaller and smaller terminal sizes, the layout design requirements for signal detection, power detection, etc. are getting higher and higher, and the existing designs can no longer meet the application requirements.

Contents of the invention

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

In order to solve the problems of the technologies described above, the present invention is achieved in that:

In a first aspect, an embodiment of the present invention provides a power detection circuit, which is applied to a terminal, and the circuit includes: a radio frequency transceiver module and a detection module;

The detection module includes: a first radio frequency front-end module and a first switch module; the radio frequency transceiver module is connected to the first switch module through the first radio frequency front-end module, and the first switch module is connected to at least two antennas of the terminal; wherein,

The switch module includes a first branch provided with a first directional coupler and a plurality of second branches; wherein the first directional coupler is connected to the radio frequency transceiver module;

The radio frequency front-end module includes at least one transmitting sub-module and at least one receiving sub-module;

One end of the first branch is used to connect with one of the transmitting submodules in the at least one transmitting submodule; or, it is switchably connected with a plurality of transmitting submodules in the at least one transmitting submodule; the other end of the first branch is used for for switchably connecting with at least two antennas;

One end of the second branch is used to be connected to one of the receiving submodules in the at least one receiving submodule, or to be switchably connected to a plurality of receiving submodules in the at least one receiving submodule; the other end of the second branch is used for for switchable connection with at least two antennas.

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

In the embodiment of the present invention, when the terminal is actually used, it is guaranteed to support free switching between multiple antennas and ensure the accuracy of power calling. In addition, it solves the problem of reducing power detection while supporting free switching between multiple antennas. The area of the circuit layout and the issue of cost reduction.

Description of drawings

The present invention can be better understood from the following description of specific embodiments of the present invention in conjunction with the accompanying drawings, wherein the same or similar reference numerals represent the same or similar features.

Fig. 1 is a kind of power detection circuit based on NSA mode;

Figure 2 is another power detection circuit based on NSA mode;

FIG. 3 is a circuit structural diagram of a power detection circuit provided by an embodiment of the present invention;

FIG. 4 is a first circuit structural diagram of a power detection circuit provided by an embodiment of the present invention;

FIG. 5 is a second circuit structure diagram of a power detection circuit provided by an embodiment of the present invention;

FIG. 6 is a third circuit structure diagram of a power detection circuit provided by an embodiment of the present invention;

FIG. 7 is a fourth circuit structure diagram of a power detection circuit provided by an embodiment of the present invention;

FIG. 8 is a fifth circuit structure diagram of a power detection circuit provided by an embodiment of the present invention;

FIG. 9 is a sixth circuit structure diagram of a power detection circuit provided by an embodiment of the present invention;

FIG. 10 is a schematic diagram of a hardware structure of a terminal provided by an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Currently, two networking modes are used in the 5G network: Standalone (SA) and Non-standalone (NSA). The two have different requirements for technical requirements and implementation methods. Taking NSA mode as an example, the following technical conditions must be met:

1. Long Term Evolution (LTE) and 5G New Radio (New Radio, NR) communicate based on dual connections, that is, the LTE frequency band and the NR frequency band can work simultaneously.

Here, when the LTE works independently, it can also support dual-antenna or multi-antenna switching and the ability to support 4*4 MIMO for downlink reception.

2. The 5G NR frequency band needs to support the 1-transmit-4-receive (1T4R) channel sounding reference signal (Sounding Reference Signal, SRS) antenna transmission technology in turn.

Here, among antennas that support 1T4R, TRx is the main receiver for sending and receiving signals, and the other three Rx channels are for auxiliary receiving signals. experience.

As shown in Figure 1 and Figure 2, it is a current power detection circuit based on NSA mode. As shown in Figure 1, it specifically includes: a radio frequency transceiver module (for example: a radio frequency transceiver), an LTE radio frequency front-end module 10, an NR radio frequency front-end module 11, a switch module of the first 4P4T (for example: P1-P4 ports and T1 to T4 ports), the switch module and signal detection module of the second 4P4T. Wherein, the LTE radio frequency front-end module 10 and the NR radio frequency front-end module 11 respectively adopt a 4-antenna design.

Specifically, the radio frequency transceiver module is connected to the 4 first ports in the first 4P4T switch module through the 4 sub-modules in the LTE radio frequency front-end module 10 in one-to-one correspondence, and the 4 second ports in the first 4P4T switch module The ports are used for one-to-one connection with the four first antennas in the terminal; a signal detection module is provided on the connection path between each second port and the antennas.

Among them, the radio frequency transceiver module is connected to the 4 first ports in the switch module of the second 4P4T through the 4 sub-modules in the NR radio frequency front-end module 11 in one-to-one correspondence, and the 4 second ports in the switch module of the second 4P4T It is used for one-to-one connection with the four second antennas in the terminal; a signal detection module is arranged on the connection path between each second port and the antenna.

Wherein, the signal detection module includes a directional coupler. In addition, the directional coupler is also used for connecting with the SP8T radio frequency switch, and the SP8T radio frequency switch is connected with the radio frequency transceiver module, so as to send the transmission signal on each antenna to the radio frequency transceiver module 10 .

Based on this structure, it is possible to ensure that the LTE frequency band can realize 4*4 MIMO for downlink reception through 4 antennas, and the switch module can also realize the free switching of LTE transmission (Tx) signals among the 4 LTE antennas.

In the same way, the NR frequency band can realize 1T4R through 4 antennas, and the NR Tx signal can be switched among the 4 NR antennas through the 4P4T switch module, that is, the SRS antenna transmission technology.

Because, while performing power detection on the TX power, it is also necessary to realize free switching among the four antennas. Therefore, a directional coupler is required on each channel to realize power detection and ensure the accuracy of power transfer. Here, the eight antennas shown in Figure 1 need to correspond to eight directional couplers to meet the requirements.

As shown in Figure 2, another power detection circuit based on NSA mode specifically includes: RF transceiver module, LTE RF front-end module 20, NR RF front-end module 21, first 4P4T switch module, second 4P4T switch module group and signal detection module. The connection relationship of this circuit is different from that in Figure 1 in that the signal detection module includes a combiner and a directional coupler. Wherein, the combiner can connect one sub-module in the LTE radio frequency front-end module 20 and one sub-module in the NR radio frequency front-end module 21 to one antenna. Thus, each antenna in the 4 antennas corresponds to a directional coupler, and the 4 couplers are also used to connect with the SP4T radio frequency switch, and the SP4T radio frequency switch is connected with the radio frequency transceiver module so that the radio frequency transceiver module determines the directional coupler on each antenna. transmit a signal.

Based on this circuit structure, four-way reception in the LTE frequency band and NR frequency band can be realized. At the same time, LTE can also realize LTE multi-antenna switching technology through the 4P4T switch module, and NR can realize SRS through the 4P4T switch module. However, this circuit structure also requires four directional couplers to complete power detection.

Although the structures in Fig. 1 and Fig. 2 can realize power detection. However, as the size of the terminal becomes smaller and smaller, the requirement for the layout area of the power detection circuit becomes higher and higher. The above-mentioned structure is complex and costly, and cannot meet the needs of terminal development.

Therefore, the embodiments of the present invention provide a power detection circuit, so as to reduce the layout area and cost of the power detection circuit while supporting free switching between multiple antennas and ensuring the accuracy of power transfer.

FIG. 3 is a circuit structure diagram of a power detection circuit provided by an embodiment of the present invention.

As shown in Figure 3, the power detection circuit includes: the circuit includes: a radio frequency transceiver module and a detection module;

The detection module includes: a first radio frequency front-end module and a first switch module; the radio frequency transceiver module is connected to the first switch module through the first radio frequency front-end module, and the first switch module is connected to at least two antennas of the terminal; wherein,

The switch module includes a first branch provided with a first directional coupler and a plurality of second branches; wherein the first directional coupler is connected to the radio frequency transceiver module;

The radio frequency front-end module includes at least one transmitting sub-module and at least one receiving sub-module;

One end of the first branch is used to connect with one of the transmitting submodules in the at least one transmitting submodule; or, it is switchably connected with a plurality of transmitting submodules in the at least one transmitting submodule; the other end of the first branch is used for for switchably connecting with at least two antennas;

One end of the second branch is used to be connected to one of the receiving submodules in the at least one receiving submodule, or to be switchably connected to a plurality of receiving submodules in the at least one receiving submodule; the other end of the second branch is used for for switchable connection with at least two antennas.

The power detection circuit in the embodiment of the present invention, based on the NSA mode, realizes the downlink 4*4 MIMO of LTE or NR by improving the switch module, and can reduce the number of directional coupler designs in the case of multi-antenna switching ,cut costs.

Wherein, the first radio frequency front-end module includes an NR radio frequency front-end module and/or an LTE radio frequency front-end module. Further, at least one transmitting submodule in the first RF front-end module is an NR RF front-end module or an LTE RF front-end module; at least one receiving sub-module in the first RF front-end module is an NR RF front-end module or an LTE RF front-end module.

Based on the structure shown in Figure 3, the signal on each antenna is coupled to the inside of the radio frequency transceiver module through the first directional coupler, as shown in Table 1, the radio frequency transceiver module receives the power of multiple transmitted signals, and converts them through digital-to-analog conversion The Analog-to-Digital Converter (ADC) converts different powers into corresponding power detection values, and then stores the corresponding relationship between power and power detection values in the terminal, so that the terminal can call different power levels (rgi), This is called power detection. Wherein, rgi is the power level of the radio frequency transceiver module; the power detection value is converted from the current power fed back to the power level of the radio frequency transceiver module into the corresponding ADC value. For example, as shown in the second line of Table 1, assuming that the terminal is currently transmitting at a power of 27.7dbm, after ADC conversion, the corresponding power detection value is between 45011 and 47253, and the RF transceiver module determines that the transmitted rgi is a power level of 71 , this process is the process of power detection.

Table 1

channel rgi power Power detection value 19575 71 27.8 74253 19575 70 27.6 45011 19575 69 27.3 42944 19575 68 26.8 40944 19575 67 26.2 38316

Therefore, based on the power detection structure shown in FIG. 3 , this embodiment provides five specific embodiments for detailed description.

Example 1:

FIG. 4 is a first circuit structure diagram of a power detection circuit provided by an embodiment of the present invention.

As shown in Figure 4, taking the NR frequency band as an example, 1 transmission and 4 receptions are realized through 4 antennas. The power detection circuit includes: a radio frequency transceiver module and a detection module; the detection module includes a first radio frequency front-end module and a first switch module; The radio frequency transceiver module is connected to the first switch module through the first radio frequency front-end module; the first switch module is connected to four antennas of the terminal (for example: ANT1, ANT2, ANT3 and ANT4).

Among them, the first radio frequency front-end module includes 1 transceiver sub-module (for example: NR TRx module) and 3 receiving sub-modules (for example: NR Rx module), here, the description on the naming of TRx module is as follows: TRx module is used in application The middle is the transceiver module, which can receive signals or transmit signals. Since the embodiment of the present invention only needs to measure the power of the transmitted signal, when using the transmitting function in the transceiver module, the TRx module can be named only as the transceiver sub-module. Conversely, if the terminal does not perform power detection on the transmitted signal, the TRx module is regarded as a receiving submodule, and the TRx module can be classified as a receiving submodule. Here, the connection method of the TRx module is the same as that of the receiving submodule and the antenna. .

The first switch module in the embodiment of the present invention includes a first branch provided with a first directional coupler and three second branches not provided with a first directional coupler; wherein, the first directional coupler The device is connected to the RF transceiver module.

One end of the first branch is used for connecting with a transceiver sub-module in the first radio frequency front-end module; the other end of the first branch is used for switchably connecting with four antennas.

One end of the second branch is used for switchable connection with the three receiving sub-modules; the other end of the second branch is used for switchable connection with the four antennas.

Based on the structure shown in Figure 4, the implementation of the power detection circuit is as follows:

When the transceiver sub-module transmits a signal through antenna 1, the terminal controls port 1 of the first switch module to connect to one end of the first branch, and controls port 8 of the first switch module to connect to the other end of the first branch. Realize the power detection of TX when TRX transmits signal through antenna 1.

When the transceiver sub-module transmits a signal through the antenna 2, the terminal controls port 1 of the first switch module to connect to one end of the first branch, and controls port 7 of the first switch module to connect to the other end of the first branch. When the TRX transmits a signal through the antenna 2, the power detection of the TX is realized.

When the transceiver sub-module transmits a signal through the antenna 3, the terminal controls port 1 of the first switch module to connect to one end of the first branch, and controls port 6 of the first switch module to connect to the other end of the first branch. When the TRX transmits a signal through the antenna 3, the power detection of the TX is realized.

When the transceiver sub-module transmits a signal through the antenna 4, the terminal controls port 1 of the first switch module to connect to one end of the first branch, and controls port 5 of the first switch module to connect to the other end of the first branch. When the TRX transmits a signal through the antenna 4, the power detection of the TX is realized.

It can be understood that when the transceiver sub-module in the first radio frequency front-end module is connected to one of the multiple antennas through the first branch, the receiving module can be connected to the antenna other than the first branch through the second branch The antenna can be switched to receive the signal through the receiving module while detecting the transmission power.

Wherein, the number of branches in the embodiment of the present invention may be greater than or equal to 2, or may be greater than or equal to 2 and less than or equal to the number of antennas. Here, the optimal solution in Embodiment 1 is that the number of branches and The same number of antennas facilitates the switching of the first switch module so as to connect the first radio frequency front-end module and the antenna through the first switch module.

Therefore, the transceiver sub-module in the first radio frequency front-end module can realize power detection no matter which antenna is used. At the same time, this structure reduces the number of directional coupler designs, reduces the area of the power detection circuit and reduces the production cost. .

Example 2:

Similarly, the scheme of 1 transmission and 4 receptions in LTE is shown in Figure 5. The only difference from Figure 4 is that the LTE frequency band is used as an example, and the NR TRx module and NR in the RF transceiver module of the first RF front-end module The Rx module is replaced with the corresponding LTE TRx module and LTE Rx module. For the specific connection manner and the implementation manner of the power detection circuit, refer to the description in FIG. 4 , which will not be repeated here.

Example 3:

FIG. 6 is a third circuit structure diagram of a power detection circuit provided by an embodiment of the present invention.

As shown in Figure 6, the three NR Tx signals are respectively switched between the four NR antennas through the first switch module (for example: 6P4T switch module, that is, the P port of 1-6 and the 7-10T port). That is, the SRS antenna rotation technology.

The structure of the specific power detection circuit is as follows:

A radio frequency transceiver module and a detection module; the detection module includes a first radio frequency front-end module and a first switch module; the radio frequency transceiver module is connected to the first switch module through the first radio frequency front-end module; the first switch module and the four terminals of the terminal Antenna connection.

Wherein, the first radio frequency front-end module includes 3 transceiver sub-modules and 3 receiving sub-modules.

The first switch module includes a first branch provided with a first directional coupler and three second branches; wherein, the first directional coupler is connected with the radio frequency transceiver module.

One end of the first branch is used for switchably connecting with the three transceiver sub-modules in the first radio frequency front-end module; the other end of the first branch is used for switchably connecting with the four antennas.

One end of the second branch is used for switchably connecting with the three receiving sub-modules in the first radio frequency front-end module; the other end of the second branch is used for switchably connecting with the four antennas.

Based on the structure shown in Figure 6, the implementation of the power detection circuit is as follows:

When any one of the 3 transceiver sub-modules in the first RF front-end module (for example: NRTRx1 module) is selected, and the NR TRx1 module transmits signals through antenna 1, the terminal controls the port 1 connection of the first switch module One end of the first branch, and the port 10 that controls the first switch module is connected to the other end of the first branch, which can realize TX power detection when the NR TRx1 module transmits signals through antenna 1.

When the NR TRx1 module transmits signals through antenna 2, the terminal controls port 1 of the first switch module to connect to one end of the first branch, and controls port 9 of the first switch module to connect to the other end of the first branch, It can realize TX power detection when NRTRx1 module transmits signal through antenna 2.

When the NR TRx1 module transmits signals through antenna 3, the terminal controls port 1 of the first switch module to connect to one end of the first branch, and controls port 8 of the first switch module to connect to the other end of the first branch, It can realize TX power detection when NRTRx1 module transmits signal through antenna 3.

When the NR TRx1 module transmits signals through antenna 4, the terminal controls port 1 of the first switch module to connect to one end of the first branch, and controls port 7 of the first switch module to connect to the other end of the first branch, It can realize TX power detection when NRTRx1 module transmits signal through antenna 4.

Similarly, the NRTRx2 module and NR TRx3 module can also detect the power of the transmitted signal when the four antennas are switched.

It can be understood that when the transceiver sub-module in the first radio frequency front-end module is connected to one of the multiple antennas through the first branch, the receiving module in the first radio frequency front-end module can communicate with all but the first radio frequency front-end module through the second branch. Antennas other than the one connected by the branch are switchably connected so as to receive signals through the receiving module while detecting the transmission power.

Wherein, the number of branches in the embodiment of the present invention can be greater than or equal to 2, or it can be greater than or equal to 2 and less than or equal to the number of antennas. Here, the optimal solution in Embodiment 3 is that the number of branches and The same number of antennas facilitates the switching of the first switch module so as to connect the first radio frequency front-end module and the antenna through the first switch module.

Therefore, any one of the three transceiver sub-modules in the first RF front-end module can realize power detection no matter which antenna is used. At the same time, this structure reduces the number of directional coupler designs and reduces the area of the power detection circuit. and reduced production costs.

Example 4:

Similarly, LTE can also switch three NR Tx signals between four NR antennas through a switch module (for example: 6P4T switch module). As shown in Figure 7, the only difference from Figure 6 is that the LTE frequency band is taken as an example, and the NR TRx module and NR Rx module in the RF transceiver module in the first RF front-end module are replaced with the corresponding LTE TRx module and LTE Rx module . For the specific connection manner and the implementation manner of the power detection circuit, refer to the description in FIG. 6 , which will not be repeated here.

Example 5:

FIG. 8 is a fifth circuit structure diagram of a power detection circuit provided by an embodiment of the present invention.

As shown in Figure 8, based on the LTE frequency band, 1 transmission and 4 receptions will be realized through 4 antennas; -14’s T port) to switch between four NR antennas for three NR Tx signals and one LTE Tx signal respectively.

As shown in Figure 8, the power detection circuit includes: a radio frequency transceiver module and a detection module; the detection module includes a first radio frequency front-end module and a first switch module; the radio frequency transceiver module passes through the first radio frequency front-end module and the first switch module connection; the first switch module is connected to the four antennas of the terminal.

Wherein, the first radio frequency front-end module includes 1 LTE transceiver sub-module, 3 NR transceiver sub-modules, 3 LTE receiving sub-modules and 3 NR receiving sub-modules.

The first switch module includes a first branch provided with a first directional coupler and a plurality of second branches; wherein, the first directional coupler is connected with the radio frequency transceiver module.

One end of the first branch is used for switchable connection with one LTE transceiver sub-module and three NR transceiver sub-modules; the other end of the first branch is used for switchable connection with four antennas.

One end of the second branch is used for switchably connecting the receiving submodules with the three LTE receiving submodules and the three NR receiving submodules; the other end of the second branch is used for switchably connecting with the four antennas.

Based on the structure shown in Figure 8, the implementation of the power detection circuit is as follows:

When any one of the transceiver submodules (for example: NR TRx1 module) is selected from one LTE transceiver submodule and three NR transceiver submodules in the first radio frequency front-end module, and the NR TRx1module transmits signals through antenna 1, the terminal controls the first The port 5 of a switch module is connected to one end of the first branch, and the port 14 controlling the first switch module is connected to the other end of the first branch, so that when the NR TRx1 module transmits signals through antenna 1, the TX power detection.

When the NR TRx1 module transmits signals through antenna 2, the terminal controls port 5 of the first switch module to connect to one end of the first branch, and controls port 13 of the first switch module to connect to the other end of the first branch, It can realize TX power detection when NRTRx1 module transmits signal through antenna 2.

When the NR TRx1 module transmits signals through the antenna 3, the terminal controls port 5 of the first switch module to connect to one end of the first branch, and controls port 12 of the first switch module to connect to the other end of the first branch, It can realize TX power detection when NRTRx1 module transmits signal through antenna 3.

When the NR TRx1 module transmits a signal through the antenna 4, the terminal controls the port 5 of the first switch module to connect to one end of the first branch, and the port 11 to control the first switch module to connect to the other end of the first branch, It can realize TX power detection when NRTRx1 module transmits signal through antenna 4.

Similarly, when the LTE TRx module, NRTRx2 module and NR TRx3 module can also switch between the four antennas, the power detection of the transmitted signal can be performed.

It can be understood that when the transceiver sub-module in the first radio frequency front-end module is connected to one of the multiple antennas through the first branch, the receiving module in the first radio frequency front-end module can communicate with all but the first radio frequency front-end module through the second branch. Antennas other than the one connected by the branch are switchably connected so as to receive signals through the receiving module while detecting the transmission power.

Wherein, the number of branches in the embodiment of the present invention may be greater than or equal to 2, or may be greater than or equal to 2 and less than or equal to the number of antennas. Here, the optimal solution in Embodiment 5 is that the number of branches and The same number of antennas facilitates the switching of the first switch module so as to connect the first radio frequency front-end module and the antenna through the first switch module.

Therefore, any one of the four transceiver sub-modules in the first RF front-end module can realize power detection no matter which antenna is used. At the same time, this structure reduces the number of directional coupler designs and reduces the area of the power detection circuit. and reduced production costs.

In addition, the embodiment of the present invention also provides another power detection structure.

As shown in Figure 9, the detection module based on Figure 3 may also include: a second switch module and a second radio frequency front-end module; wherein, the radio frequency transceiver module is connected to the second switch module through the second radio frequency front-end module; wherein, the second The second directional coupler in the switch module is cascaded with the first directional coupler.

At least two antennas include a first group of antennas and a second group of antennas; wherein, the first group of antennas (including antennas 1 to 4 as shown in Figure 9) are connected to the first switch module; the second group of antennas (including as shown in Figure 9 Middle antenna 5 to antenna 8) are connected with the second switch module;

The second switch module includes a third branch provided with a second directional coupler and a plurality of fourth branches;

The second radio frequency front-end module includes at least one transmitting submodule and at least one receiving submodule;

One end of the third branch is used to connect with one of the transmitting submodules in at least one transmitting submodule in the second radio frequency front-end module; or, it can be connected with a plurality of transmitting submodules in at least one transmitting submodule in the second radio frequency front-end module switchable connection; the other end of the third branch is used for switchable connection with the second group of antennas;

One end of the fourth branch is used to connect to one receiving submodule in at least one receiving submodule in the second radio frequency front-end module, or to connect with multiple receiving submodules in at least one receiving submodule in the second radio frequency front-end module connected switchably; the other end of the fourth branch is used for switchably connected with the second group of antennas.

Here, the connection manners of the first switch module and the second radio frequency front-end module can be as shown in FIGS. 3-8 , which will not be repeated here.

In an embodiment, the first radio frequency front-end module may include an NR radio frequency front-end module or an LTE radio frequency front-end module; the second radio frequency front-end module may include an NR radio frequency front-end module or an LTE radio frequency front-end module.

Specifically, based on the structure shown in FIG. 9, when the first radio frequency front-end module is an NR radio frequency front-end module, and the second radio frequency front-end module is an LTE radio frequency front-end module, the implementation of the power detection circuit is as follows:

When any one of the 3 NR transmit sub-modules in the first radio frequency front-end module is selected (for example: NR TRx1 module), and the NR TRx1 module transmits signals through antenna 1 in the first group, the terminal controls the first The port 1 of the switch module is connected to one end of the first branch, and the port 10 of the control first switch module is connected to the other end of the first branch, so that when the NR TRx1 module transmits signals through antenna 1, the TX power detection.

When the NR TRx1 module transmits signals through the antenna 2 in the first group, the port 1 of the terminal control first switch module is connected to one end of the first branch, and the port 9 of the first switch module is connected to the first branch The other end of the NR TRx1 module can realize TX power detection when the NR TRx1 module transmits signals through antenna 2.

When the NR TRx1 module transmits signals through the antenna 3 in the first group, the port 1 of the terminal control first switch module is connected to one end of the first branch, and the port 8 of the first switch module is connected to the first branch The other end of the TX can realize TX power detection when the NR TRx1 module transmits signals through antenna 3.

When the NR TRx1 module transmits signals through the antenna 4 in the first group, the port 1 of the terminal control first switch module is connected to one end of the first branch, and the port 7 of the first switch module is connected to the first branch The other end of the TX can realize TX power detection when the NR TRx1 module transmits signals through antenna 4.

When the LTE transmitting sub-module in the second radio frequency front-end module transmits a signal through the antenna 5 in the second group of antennas, the terminal controls port 1 of the second switch module to be connected to one end of the third branch, and controls the second switch module The port 8 of the group is connected to the other end of the third branch, which can realize the power detection of TX when TRX transmits signals through antenna 5.

When the LTE transmitting sub-module transmits signals through the antenna 6 in the second group of antennas, the terminal controls the port 1 of the second switch module to be connected to one end of the third branch, and the port 7 of the second switch module to control is connected to the first The other end of the three branches can realize the power detection of the TX when the TRX transmits a signal through the antenna 6 .

When the LTE transmitting sub-module transmits signals through the antenna 7 in the second group of antennas, the terminal controls port 1 of the second switch module to be connected to one end of the third branch, and port 6 of the second switch module to be controlled to be connected to the first The other end of the three branches can realize the power detection of the TX when the TRX transmits a signal through the antenna 7 .

When the LTE transmitting sub-module transmits signals through the antenna 8 in the second group of antennas, the terminal controls the port 1 of the second switch module to be connected to one end of the third branch, and the port 5 of the second switch module is controlled to be connected to the first The other end of the three branches can realize the power detection of the TX when the TRX transmits a signal through the antenna 8 .

The first directional coupler in the first switch module and the second directional coupler in the second switch module are cascaded, and the first directional coupler is connected with the radio frequency transceiver module for converting the detected first The transmit signal power in the directional coupler and the second directional coupler is sent to the radio frequency transceiver module.

In the embodiment of the present invention, the number of branches in each switch module can be greater than or equal to 2, or it can be greater than or equal to 2 and less than or equal to the number of antennas. Here, the optimal solution in Figure 9 is the branch The number of antennas is the same as the number of antennas, which is convenient for switching between the first switch module and the second switch module, so as to connect the first RF front-end module and the first group of antennas through the first switch module, and/or through the second switch module The module is connected to the second radio frequency front-end module and the second group of antennas.

It can be understood that when the transmitting sub-module in the first radio frequency front-end module is connected to one antenna in the first group of antennas through the first branch, the receiving module in the first radio frequency front-end module can communicate with the other antennas through the second branch. Antennas other than the antennas connected to the first branch are switchably connected so as to receive signals through the receiving module in the first radio frequency front-end module while detecting the transmission power. Similarly, when the transmitting sub-module in the second radio frequency front-end module is connected to an antenna in the second group of antennas through the third branch, the receiving module in the second radio frequency front-end module can communicate with the third branch through the fourth branch. Antennas other than the antennas connected to the branches are switchably connected so as to receive signals through the receiving module in the second radio frequency front-end module while detecting the transmission power.

Therefore, no matter which antenna any one of the four transmitting sub-modules passes through, power detection can be realized. At the same time, this structure reduces the number of directional couplers to be designed, reduces the area of the power detection circuit, and lowers the manufacturing cost.

FIG. 10 is a schematic diagram of a hardware structure of a terminal provided by an embodiment of the present invention.

The mobile terminal 1000 includes, but is not limited to: a radio frequency unit 1001, a network module 1002, an audio output unit 1003, an input unit 1004, a sensor 1005, a display unit 1006, a user input unit 1007, an interface unit 1008, a memory 1009, a processor 1010, and Power supply 1011 and other components. Those skilled in the art can understand that the structure of the mobile terminal shown in Figure 10 does not constitute a limitation on the mobile terminal, and the mobile terminal may include more or less components than shown in the figure, or combine some components, or different components layout. 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 palmtop computer, a vehicle-mounted terminal, a wearable device, and a pedometer.

Wherein, the radio frequency unit 1001 includes any power detection circuit provided by the embodiment of the present invention, so as to solve the problem of reducing the layout area and cost of the power detection circuit while supporting free switching between multiple antennas.

It should be understood that, in the embodiment of the present invention, the radio frequency unit 1001 can be used to receive and send signals during information transmission or conversation, specifically, after receiving downlink resources from the base station, the processor 1010 processes them; Uplink resources are sent to the base station. Generally, the radio frequency unit 1001 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 1001 can also communicate with the network and other devices through a wireless communication system.

The mobile terminal provides users with wireless broadband Internet access through the network module 1002, such as helping users send and receive emails, browse web pages, and access streaming media.

The audio output unit 1003 may convert audio resources received by the radio frequency unit 1001 or the network module 1002 or stored in the memory 1009 into audio signals and output as sound. Also, the audio output unit 1003 can also provide audio output related to a specific function performed by the mobile terminal 1000 (for example, a call signal reception sound, a message reception sound, etc.). The audio output unit 1003 includes a speaker, a buzzer, a receiver, and the like.

The input unit 1004 is used to receive audio or video signals. The input unit 1004 may include a Graphics Processing Unit (Graphics Processing Unit, GPU) 10041 and a microphone 10042, and the Graphics Processor 10041 is used for still pictures or video images obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. resources are processed. The processed image frames may be displayed on the display unit 1006 . The image frames processed by the graphics processor 10041 may be stored in the memory 1009 (or other storage medium) or sent via the radio frequency unit 1001 or the network module 1002 . Microphone 10042 can receive sound and can process such sound as an audio resource. The processed audio resource can be converted into an output format that can be sent to a mobile communication base station via the radio frequency unit 1001 in the case of a telephone call mode.

The mobile terminal 1000 also includes at least one sensor 1005, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display panel 10061 according to the brightness of the ambient light, and the proximity sensor can turn off the display panel 10061 and the / or backlighting. As a kind of motion sensor, the accelerometer sensor can detect the magnitude of acceleration in various directions (generally three axes), and can detect the magnitude and direction of gravity when it is still, and can be used to identify the posture of mobile terminals (such as horizontal and vertical screen switching, related games, etc.) , magnetometer posture calibration), vibration recognition-related functions (such as pedometer, knocking), etc.; the sensor 1005 can also include fingerprint sensors, pressure sensors, iris sensors, molecular sensors, gyroscopes, barometers, hygrometers, thermometers, Infrared sensors, etc., will not be repeated here.

The display unit 1006 is used to display information input by the user or information provided to the user. The display unit 1006 may include a display panel 10061, and the display panel 10061 may be configured in the form of a liquid crystal display (Liquid Crystal Display, LCD), an organic light-emitting diode (Organic Light-Emitting Diode, OLED), or the like.

The user input unit 1007 can be used to receive input numbers or character information, and generate key signal input related to user settings and function control of the mobile terminal. Specifically, the user input unit 1007 includes a touch panel 10071 and other input devices 10072 . The touch panel 10071, also referred to as a touch screen, can collect touch operations of the user on or near it (for example, the user uses any suitable object or accessory such as a finger and a stylus on the touch panel 10071 or near the touch panel 10071 operate). The touch panel 10071 may include two parts, a touch detection device and a touch controller. Among them, the touch detection device detects the user's touch orientation, and detects the signal brought by the touch operation, and transmits the signal to the touch controller; the touch controller receives the touch information from the touch detection device, converts it into contact coordinates, and sends it to the For the processor 1010, receive the command sent by the processor 1010 and execute it. In addition, the touch panel 10071 can be implemented in various types such as resistive, capacitive, infrared, and surface acoustic wave. In addition to the touch panel 10071 , the user input unit 1007 may also include other input devices 10072 . Specifically, other input devices 10072 may include, but are not limited to, physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be repeated here.

Furthermore, the touch panel 10071 can be covered on the display panel 10061, and when the touch panel 10071 detects a touch operation on or near it, it will be sent to the processor 1010 to determine the type of the touch event, and then the processor 1010 will The type of event provides a corresponding visual output on the display panel 10061. Although in FIG. 10, the touch panel 10071 and the display panel 10061 are used as two independent components to realize the input and output functions of the mobile terminal, in some embodiments, the touch panel 10071 and the display panel 10061 can be integrated. The implementation of the input and output functions of the mobile terminal is not specifically limited here.

The interface unit 1008 is an interface for connecting an external device to the mobile terminal 1000 . For example, external devices may include a wired or wireless headset port, an external power (or battery charger) port, a wired or wireless resource port, a memory card port, a port for connecting a device with an identification module, audio input/output (I/O) ports, video I/O ports, headphone ports, and more. The interface unit 1008 can be used to receive input from an external device (for example, resource information, power, etc.) Transfer resources between devices.

The memory 1009 can be used to store software programs as well as various resources. The memory 1009 can mainly include a program storage area and a storage resource area, wherein the program storage area can store an operating system, at least one application program required by a function (such as a sound playback function, an image playback function, etc.); Resources created by the use of mobile phones (such as audio resources, phonebooks, etc.) and the like. In addition, the memory 1009 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage devices.

The processor 1010 is the control center of the mobile terminal, which uses various interfaces and lines to connect various parts of the entire mobile terminal, runs or executes software programs and/or modules stored in the memory 1009, and invokes resources stored in the memory 1009 , executing various functions and processing resources of the mobile terminal, so as to monitor the mobile terminal as a whole. The processor 1010 may include one or more processing units; preferably, the processor 1010 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface and application programs, etc., and the modem The processor mainly handles wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 1010 .

The mobile terminal 1000 can also include a power supply 1011 (such as a battery) for supplying power to various components. Preferably, the power supply 1011 can be logically connected to the processor 1010 through a power management system, so as to manage charging, discharging, and power consumption through the power management system. and other functions.

In addition, the mobile terminal 1000 includes some functional modules not shown, which will not be repeated here.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of software products, and the computer software products are stored in a storage medium (such as ROM/RAM, disk, CD-ROM), including several instructions to make a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) execute the method of each embodiment of the present invention.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, without departing from the gist of the present invention and the protection scope of the claims, many forms can also be made, all of which belong to the protection of the present invention.

Claims (12)

1. A power detection circuit applied to a terminal, comprising: a radio frequency transceiver module and a detection module; The detection module includes a first radio frequency front-end module and a first switch module; the radio frequency transceiver module is connected to the first switch module through the first radio frequency front-end module, and the first switch module is connected to the first switch module At least two antenna connections of the terminal; wherein, The first switch module includes a first branch provided with a first directional coupler and a plurality of second branches; wherein the first directional coupler is connected to the radio frequency transceiver module; The first radio frequency front-end module includes at least one transmitting submodule and at least one receiving submodule; One end of the first branch is used to connect to one of the transmitting submodules in the at least one transmitting submodule; or, switchably connect to multiple transmitting submodules in the at least one transmitting submodule; the The other end of the first branch is used for switchably connecting with the at least two antennas; One end of the second branch is used to be connected to one receiving submodule of the at least one receiving submodule, or to be switchably connected to multiple receiving submodules of the at least one receiving submodule; The other end of the second branch is used for switchably connecting with the at least two antennas. 2. The circuit according to claim 1, wherein when the first transmitting submodule in at least one transmitting submodule in the first radio frequency front-end module transmits through the first antenna in the at least two antennas When receiving a signal, the first transmitting sub-module is connected to the first antenna through the first branch. 3. The circuit according to claim 1, wherein the total number of the first branch and the second branch is greater than or equal to 2 and less than or equal to the number of the antennas. 4. The circuit according to claim 1, wherein the number of transmitting sub-modules in the first radio frequency front-end module is at least one, and the number of receiving sub-modules in the first radio frequency front-end module is at least one 3. 5. The circuit according to claim 1, wherein the number of transmitting sub-modules in the first radio frequency front-end module is at least three, and the number of receiving sub-modules in the first radio frequency front-end module is at least 3. 6. The circuit according to any one of claims 1-5, wherein the first radio frequency front-end module comprises a New Radio Interface NR radio frequency front-end module and/or a Long Term Evolution LTE radio frequency front-end module. 7. The circuit according to claim 1, wherein the detection module further comprises: a second switch module and a second radio frequency front-end module; The radio frequency transceiver module is connected to the second switch module through the second radio frequency front-end module; wherein, the second directional coupler in the second switch module is cascaded with the first directional coupler . 8. The circuit of claim 7, wherein the at least two antennas comprise a first group of antennas and a second group of antennas; wherein, The first group of antennas is connected to the first switch module; The second group of antennas is connected to the second switch module; The second switch module includes a third branch provided with the second directional coupler and a plurality of fourth branches; The second radio frequency front-end module includes at least one transmitting submodule and at least one receiving submodule; One end of the third branch is used to connect to one of the transmitting submodules in at least one transmitting submodule in the second radio frequency front-end module; or, to connect to at least one transmitting submodule in the second radio frequency front-end module Multiple transmitting sub-modules are switchably connected; the other end of the third branch is used for switchably connecting with the second group of antennas; One end of the fourth branch is used to connect to one of the receiving submodules in the at least one receiving submodule in the second radio frequency front-end module, or to connect to at least one receiving submodule in the second radio frequency front-end module Multiple receiving sub-modules are switchably connected; the other end of the fourth branch is used for switchably connecting with the second group of antennas. 9. The circuit according to claim 8, wherein when the first transmitting sub-module in at least one transmitting sub-module in the first radio frequency front-end module passes through the first transmitting sub-module in the first group of antennas When the antenna sends a signal, the first transmitting sub-module is connected to the first antenna through the first branch. 10. The circuit according to claim 8 or 9, wherein when the second transmitting sub-module in at least one transmitting sub-module in the second radio frequency front-end module passes through the second transmitting sub-module in the second group of antennas When the antenna sends a signal, the second transmitting sub-module is connected to the second antenna through the third branch. 11. The circuit according to claim 10, wherein the first radio frequency front-end module comprises a new air interface NR radio frequency front-end module or a long-term evolution LTE radio frequency front-end module; The second radio frequency front-end module includes a new air interface NR radio frequency front-end module or a long-term evolution LTE radio frequency front-end module. 12. A terminal, comprising: the power detection circuit according to any one of claims 1-11.