CN110166146B - Power detection circuit and terminal - Google Patents
Power detection circuit and terminal Download PDFInfo
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- CN110166146B CN110166146B CN201910340892.2A CN201910340892A CN110166146B CN 110166146 B CN110166146 B CN 110166146B CN 201910340892 A CN201910340892 A CN 201910340892A CN 110166146 B CN110166146 B CN 110166146B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/10—Monitoring; Testing of transmitters
- H04B17/101—Monitoring; Testing of transmitters for measurement of specific parameters of the transmitter or components thereof
- H04B17/102—Power radiated at antenna
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
Abstract
The embodiment of the invention discloses a power detection circuit and a terminal, comprising: the radio frequency transceiver module is connected with the first switch module through the first radio frequency front-end module, and the first switch module is connected with at least two antennas; the first switch module comprises a first branch provided with a first directional coupler and a plurality of second branches; the first directional coupler is connected with the radio frequency transceiving module; the first radio frequency front end module comprises a transmitting submodule and a receiving submodule; one end of the first branch is used for being connected with a transmitting submodule; or switchably connected with a plurality of transmit sub-modules; the other end of the first branch is used for being switchably connected with at least two antennas; one end of the second branch is used for being connected with one receiving submodule or switchably connected with a plurality of receiving submodules; the other end of the second branch is used for switchably connecting with at least two antennas. The area of the power detection circuit layout can be reduced by utilizing the embodiment of the invention.
Description
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 device comprises a radio frequency transceiving module and a detection module;
the detection module includes: the system comprises a first radio frequency front-end module and a first switch module; the radio frequency transceiver module is connected with a first switch module through a first radio frequency front end module, and the first switch module is connected with at least two antennas of the terminal; wherein the content of the first and second substances,
the switch module comprises a first branch provided with a first directional coupler and a plurality of second branches; the first directional coupler is connected with the radio frequency transceiving module;
the radio frequency front end module comprises at least one transmitting submodule and at least one receiving submodule;
one end of the first branch is used for being connected with one of the at least one transmitting submodule; or switchably connected to a plurality of the at least one transmit sub-module; the other end of the first branch is used for being switchably connected with at least two antennas;
one end of the second branch is used for being connected with one receiving submodule of the at least one receiving submodule or switchably connected with a plurality of receiving submodules of the at least one receiving submodule; the other end of the second branch is used for switchably connecting with at least two antennas.
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 fourth circuit structure diagram of a power detection circuit according to an embodiment of the present invention;
fig. 8 is a fifth circuit structure diagram of a power detection circuit according to an embodiment of the present invention;
fig. 9 is a sixth circuit structure diagram of a power detection circuit according to an embodiment of the present invention;
fig. 10 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 × 4MIMO 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 technique.
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 × 4MIMO 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.
Fig. 3 is a circuit structure diagram of a power detection circuit according to an embodiment of the present invention.
As shown in fig. 3, the power detection circuit includes: the circuit includes: the device comprises a radio frequency transceiving module and a detection module;
the detection module includes: the system comprises a first radio frequency front-end module and a first switch module; the radio frequency transceiver module is connected with a first switch module through a first radio frequency front end module, and the first switch module is connected with at least two antennas of the terminal; wherein the content of the first and second substances,
the switch module comprises a first branch provided with a first directional coupler and a plurality of second branches; the first directional coupler is connected with the radio frequency transceiving module;
the radio frequency front end module comprises at least one transmitting submodule and at least one receiving submodule;
one end of the first branch is used for being connected with one of the at least one transmitting submodule; or switchably connected to a plurality of the at least one transmit sub-module; the other end of the first branch is used for being switchably connected with at least two antennas;
one end of the second branch is used for being connected with one receiving submodule of the at least one receiving submodule or switchably connected with a plurality of receiving submodules of the at least one receiving submodule; the other end of the second branch is used for switchably connecting with at least two antennas.
The power detection circuit in the embodiment of the invention realizes the 4 x 4MIMO 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 first radio frequency front end module comprises an NR radio frequency front end module and/or an LTE radio frequency front end module. Furthermore, at least one transmitting submodule in the first radio frequency front end module is an NR radio frequency front end module or an LTE radio frequency front terminal module; at least one receiving submodule in the first radio frequency front end module 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 first directional coupler, as shown in table 1, the rf transceiver module receives the powers of a plurality of transmitted signals, converts different powers into corresponding power detection values through an Analog-to-Digital Converter (ADC), 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
| Channel with a plurality of channels | rgi | Power of | 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 |
Thus, based on the power detection structure as shown in fig. 3, the present embodiment provides a detailed description of 5 specific embodiments.
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, taking NR frequency band as an example, 1 transmitting and 4 receiving are realized by 4 antennas, and the power detection circuit includes: the device comprises a radio frequency transceiving module and a detection module; the detection module comprises a first radio frequency front end module and a first switch module; the radio frequency transceiver module is connected with the first switch module through the first radio frequency front-end module; the first switch module is connected to 4 antennas of the terminal (e.g., ANT1, ANT2, ANT3, and ANT 4).
The first rf front-end module includes 1 transceiver module (NR TRx module for example) and 3 receiver modules (NR Rx module for example), where the following is named for the 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 transmitted signal, when the transmitting function in the transceiver module is utilized, the TRx module name can be classified into only the transceiver 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.
The first switch module in the embodiment of the invention comprises a first branch provided with a first directional coupler and 3 second branches not provided with the first directional coupler; the first directional coupler is connected with the radio frequency transceiving module.
One end of the first branch is used for being connected with 1 transmitting-receiving sub-module in the first radio frequency front-end module; the other end of the first branch is used for switchably connecting with 4 antennas.
One end of the second branch is used for being switchably connected with the 3 receiving submodules; the other end of the second branch is used for switchably connecting with 4 antennas.
Based on the structure shown in fig. 4, the power detection circuit is implemented as follows:
when the transceiver sub-module transmits signals through the antenna 1, the terminal controls the port1 of the first switch module to be connected to one end of the first branch and controls the port 8 of the first switch module to be connected to the other end of the first branch, so that the power detection of the TX can be realized when the TRX transmits signals through the antenna 1.
When the transceiver sub-module transmits signals through the antenna 2, the terminal controls the port1 of the first switch module to be connected to one end of the first branch and controls the port 7 of the first switch module to be connected to the other end of the first branch, so that the power detection of the TX can be realized when the TRX transmits signals through the antenna 2.
When the transceiver sub-module transmits signals through the antenna 3, the terminal controls the port1 of the first switch module to be connected to one end of the first branch and controls the port 6 of the first switch module to be connected to the other end of the first branch, so that the power detection of the TX can be realized when the TRX transmits signals through the antenna 3.
When the transceiver sub-module transmits signals through the antenna 4, the terminal controls the port1 of the first switch module to be connected to one end of the first branch and controls the port 5 of the first switch module to be connected to the other end of the first branch, so that the power detection of the TX can be realized when the TRX transmits signals through the antenna 4.
It is understood that, when the transceiver sub-module in the first rf front-end module is connected to one of the plurality of antennas through the first branch, the receiving module may be switchably connected to the antennas other than the antenna connected to the first branch through the second branch, so as to receive the signal through the receiving module while detecting the transmission power.
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, where in an optimal scheme in embodiment 1, the number of branches is the same as the number of antennas, which facilitates switching of the first switch module, so as to connect the first rf front-end module and the antennas through the first switch module.
Therefore, the transceiver sub-module in the first radio frequency front-end module can realize power detection through any antenna, and the structure reduces the number of designed directional couplers, reduces the area of a power detection circuit and reduces the manufacturing cost.
Example 2:
similarly, the scheme of 1 sending and 4 receiving in LTE is shown in fig. 5, where the difference from fig. 4 is only that in LTE frequency band, for example, the NR TRx module and NR Rx module in the radio frequency transceiver module in the first radio frequency front end module are replaced by LTE TRx module and LTE Rx module corresponding thereto. The specific connection manner and the implementation manner of the power detection circuit refer to the description in fig. 4, and are not described herein again.
Example 3:
fig. 6 is a third circuit structure diagram of a power detection circuit according to an embodiment of the present invention.
As shown in fig. 6, the switching of three NR Tx signals between 4 NR antennas, i.e. SRS antenna transmission, is realized by a first switch module (e.g. 6P4T switch module, i.e. 1-6P port and 7-10T port).
The structure of the specific power detection circuit is as follows:
the device comprises a radio frequency transceiving module and a detection module; the detection module comprises a first radio frequency front end module and a first switch module; the radio frequency transceiver module is connected with the first switch module through the first radio frequency front-end module; the first switch module is connected with 4 antennas of the terminal.
The first radio frequency front end module comprises 3 transceiving sub-modules and 3 receiving sub-modules.
The first switch module comprises a first branch provided with a first directional coupler and 3 second branches; the first directional coupler is connected with the radio frequency transceiving module.
One end of the first branch circuit is used for being switchably connected with 3 transceiver sub-modules in the first radio frequency front-end module; the other end of the first branch is used for switchably connecting with 4 antennas.
One end of the second branch circuit is used for switchably connecting with 3 receiving sub-modules in the first radio frequency front-end module; the other end of the second branch is used for switchably connecting with 4 antennas.
Based on the structure shown in fig. 6, the power detection circuit is implemented as follows:
when any one transceiver sub-module (for example, NR TRx1 module) is selected from the 3 transceiver sub-modules in the first rf front-end module and the NR TRx1module transmits a signal through the antenna 1, the terminal controls the port1 of the first switch module to be connected to one end of the first branch and controls the port 10 of the first switch module to be connected to the other end of the first branch, so that the power detection of the TX when the NR TRx1module transmits a signal through the antenna 1 can be achieved.
When the NR TRx1module transmits signals through the antenna 2, the terminal controls the port1 of the first switch module to be connected to one end of the first branch, and controls the port 9 of the first switch module to be connected to the other end of the first branch, so that the power detection of the TX can be realized when the NR TRx1module transmits signals through the antenna 2.
When the NR TRx1module transmits signals through the antenna 3, the terminal controls the port1 of the first switch module to be connected to one end of the first branch, and controls the port 8 of the first switch module to be connected to the other end of the first branch, so that the power detection of the TX can be realized when the NR TRx1module transmits signals through the antenna 3.
When the NR TRx1module transmits signals through the antenna 4, the terminal controls the port1 of the first switch module to be connected to one end of the first branch, and controls the port 7 of the first switch module to be connected to the other end of the first branch, so that the power detection of the TX can be realized when the NR TRx1module transmits signals through the antenna 4.
Similarly, the NRTRx2 module and the NR TRx3 module can also perform power detection of a transmitted signal when four antennas are switched.
It can be understood that, when the transceiver sub-module in the first rf front-end module is connected to one of the plurality of antennas through the first branch, the receiving module in the first rf front-end module may be switchably connected to the antennas other than the antenna connected to the first branch through the second branch, so as to receive a signal through the receiving module while detecting the transmission power.
Here, 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, where an optimal scheme in embodiment 3 is that the number of branches is the same as the number of antennas, which facilitates switching of the first switch module, so as to connect the first radio frequency front end module and the antennas through the first switch module.
Therefore, any one of the 3 transceiver sub-modules in the first radio frequency front-end module can realize power detection through any one antenna, and the structure reduces the number of designed directional couplers, reduces the area of a power detection circuit and reduces the manufacturing cost.
Example 4:
similarly, LTE can also switch three NR Tx signals between 4 NR antennas by using a switch module (e.g., 6P4T switch module). As shown in fig. 7, the difference from fig. 6 is only that the LTE frequency band is taken as an example, and the NR TRx module and the NR Rx module in the radio frequency transceiver module in the first radio frequency front end module are replaced by the LTE TRx module and the LTE Rx module corresponding thereto. The specific connection manner and the implementation manner of the power detection circuit are described with reference to fig. 6, and are not described herein again.
Example 5:
fig. 8 is a fifth circuit structure diagram of a power detection circuit according to an embodiment of the present invention.
As shown in fig. 8, based on the LTE frequency band, 1 transmission and 4 reception are implemented by 4 antennas; and based on the NR frequency band, switching between 4 NR antennas will be achieved by a first switch module (e.g., 10P4T switch module, i.e., P ports of 1-10 and T ports of 11-14) for three NR Tx signals and 1 LTE Tx signal, respectively.
As shown in fig. 8, the power detection circuit includes: the device comprises a radio frequency transceiving module and a detection module; the detection module comprises a first radio frequency front end module and a first switch module; the radio frequency transceiver module is connected with the first switch module through the first radio frequency front-end module; the first switch module is connected with 4 antennas of the terminal.
The first radio frequency front end module comprises 1 LTE (Long term evolution) transceiving submodule, 3 NR (noise-and-noise) transceiving submodules, 3 LTE receiving submodules and 3 NR receiving submodules.
The first switch module comprises a first branch provided with a first directional coupler and a plurality of second branches; the first directional coupler is connected with the radio frequency transceiving module.
One end of the first branch circuit is used for being switchably connected with 1 LTE transceiving submodule and 3 NR transceiving submodules; the other end of the first branch is used for switchably connecting with 4 antennas.
One end of the second branch circuit is used for being switchably connected with the 3 LTE receiving sub-modules and the 3 NR receiving sub-modules; the other end of the second branch is used for switchably connecting with 4 antennas.
Based on the structure shown in fig. 8, the power detection circuit is implemented as follows:
when any one transceiver sub-module (such as NR TRx1 module) is selected from 1 LTE transceiver sub-module and 3 NR transceiver sub-modules in the first radio frequency front-end module, and the NR TRx1module transmits a signal through the antenna 1, the terminal controls the port 5 of the first switch module to be connected to one end of the first branch, and controls the port 14 of the first switch module to be connected to the other end of the first branch, so that the power detection of TX can be realized when the NR TRx1module transmits a signal through the antenna 1.
When the NR TRx1module transmits signals through the antenna 2, the terminal controls the port 5 of the first switch module to be connected to one end of the first branch circuit, and controls the port 13 of the first switch module to be connected to the other end of the first branch circuit, so that the power detection of TX can be realized when the NR TRx1module transmits signals through the antenna 2.
When the NR TRx1module transmits signals through the antenna 3, the terminal controls the port 5 of the first switch module to be connected to one end of the first branch circuit, and controls the port 12 of the first switch module to be connected to the other end of the first branch circuit, so that the power detection of TX can be realized when the NR TRx1module transmits signals through the antenna 3.
When the NR TRx1module transmits signals through the antenna 4, the terminal controls the port 5 of the first switch module to be connected to one end of the first branch circuit, and controls the port 11 of the first switch module to be connected to the other end of the first branch circuit, so that the power detection of TX can be realized when the NR TRx1module transmits signals through the antenna 4.
Similarly, when the LTE TRx module, the NRTRx2 module, and the NR TRx3 module are switched among 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 rf front-end module is connected to one of the plurality of antennas through the first branch, the receiving module in the first rf front-end module may be switchably connected to the antennas other than the antenna connected to the first branch through the second branch, so as to receive a signal through the receiving module while detecting the transmission power.
Here, 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, where an optimal scheme in embodiment 5 is that the number of branches is the same as the number of antennas, which facilitates switching of the first switch module, so as to connect the first radio frequency front end module and the antennas through the first switch module.
Therefore, any one of the 4 transceiver sub-modules in the first radio frequency front-end module can realize power detection through any one antenna, and the structure reduces the number of designed directional couplers, reduces the area of a power detection circuit and reduces the manufacturing cost.
In addition, the embodiment of the invention also provides another power detection structure.
As shown in fig. 9, the detection module may further include, based on fig. 3: the second switch module and the second radio frequency front end module; the radio frequency transceiver module is connected with the second switch module through a second radio frequency front-end module; and the second directional coupler in the second switch module is cascaded with the first directional coupler.
The at least two antennas comprise a first set of antennas and a second set of antennas; wherein, the first group of antennas (including antennas 1 to 4 as shown in fig. 9) is connected to the first switch module; the second group of antennas (including antennas 5 to 8 as shown in fig. 9) is connected to the second switch module;
the second switch module comprises a third branch provided with a second directional coupler and a plurality of fourth branches;
the second radio frequency front end module comprises at least one transmitting submodule and at least one receiving submodule;
one end of the third branch circuit is used for being connected with one of at least one transmitting submodule in the second radio frequency front-end module; or switchably connected with a plurality of transmitting sub-modules in at least one transmitting sub-module in the second radio frequency front end module; the other end of the third branch is used for being switchably connected with the second group of antennas;
one end of the fourth branch is used for being connected with one receiving submodule in at least one receiving submodule in the second radio frequency front-end module, or switchably connected with a plurality of receiving submodules in at least one receiving submodule in the second radio frequency front-end module; the other end of the fourth branch is for switchably connecting with a second set of antennas.
Here, the connection modes of the first switch module and the second rf front-end module can be as shown in fig. 3 to 8, and are not described herein again.
In one embodiment, the first radio frequency front end module may comprise an NR radio frequency front end module or an LTE radio frequency front end module; the second radio frequency front end module may comprise 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 rf front-end module is an NR rf front-end module and the second rf front-end module is an LTE rf front-end module, the implementation manner of the power detection circuit is as follows:
when any one of the 3 NR transmitting sub-modules (for example, NR TRx1 module) in the first rf front-end module is selected and the NR TRx1module transmits a signal through the antenna 1 in the first group, the terminal controls the port1 of the first switch module to be connected to one end of the first branch and controls the port 10 of the first switch module to be connected to the other end of the first branch, so that the power detection of TX can be achieved when the NR TRx1module transmits a signal through the antenna 1.
When the NR TRx1module transmits a signal through the antenna 2 in the first group, the terminal controls the port1 of the first switch module to be connected to one end of the first branch, and controls the port 9 of the first switch module to be connected to the other end of the first branch, so that the power detection of TX can be realized when the NR TRx1module transmits a signal through the antenna 2.
When the NR TRx1module transmits a signal through the antenna 3 in the first group, the terminal controls the port1 of the first switch module to be connected to one end of the first branch, and controls the port 8 of the first switch module to be connected to the other end of the first branch, so that the power detection of TX can be realized when the NR TRx1module transmits a signal through the antenna 3.
When the NR TRx1module transmits a signal through the antenna 4 in the first group, the terminal controls the port1 of the first switch module to be connected to one end of the first branch, and controls the port 7 of the first switch module to be connected to the other end of the first branch, so that the power detection of TX can be realized when the NR TRx1module transmits a signal through the antenna 4.
When the LTE emission submodule in the second radio frequency front end module emits signals through the antenna 5 in the second group of antennas, the terminal controls the port1 of the second switch module to be connected to one end of the third branch circuit and controls the port 8 of the second switch module to be connected to the other end of the third branch circuit, and therefore the power detection of TX can be achieved when TRX emits signals through the antenna 5.
When the LTE transmitting sub-module transmits signals through the antenna 6 in the second group of antennas, the terminal controls the port1 of the second switch module to be connected to one end of the third branch circuit and controls the port 7 of the second switch module to be connected to the other end of the third branch circuit, and therefore the power detection of TX can be achieved when TRX transmits signals 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 the port1 of the second switch module to be connected to one end of the third branch circuit and controls the port 6 of the second switch module to be connected to the other end of the third branch circuit, and therefore the power detection of TX can be achieved when TRX transmits signals through the antenna 7.
When the LTE emission submodule emits signals through the antenna 8 in the second group of antennas, the terminal controls the port1 of the second switch module to be connected to one end of the third branch circuit and controls the port 5 of the second switch module to be connected to the other end of the third branch circuit, and therefore the power detection of TX can be achieved when the TRX emits signals through the antenna 8.
And cascading a first directional coupler in the first switch module and a second directional coupler in the second switch module, wherein the first directional coupler is connected with the radio frequency transceiving module and is used for sending the detected transmitting signal power in the first directional coupler and the second directional coupler to the radio frequency transceiving module.
In the embodiment of the present invention, the number of branches in each switch module 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, where in an optimal scheme in fig. 9, the number of branches is the same as the number of antennas, which facilitates 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 connect the second rf front-end module and the second group of antennas through the second switch module.
It can be understood that, when the transmitting sub-module in the first rf front-end module is connected to one antenna in the first group of antennas through the first branch, the receiving module in the first rf front-end module may be switchably connected to antennas other than the antenna connected to the first branch through the second branch, so as to receive a signal through the receiving module in the first rf front-end module while detecting the transmission power. Similarly, when the transmitting sub-module in the second rf front-end module is connected to one antenna in the second group of antennas through the third branch, the receiving module in the second rf front-end module may be switchably connected to antennas other than the antenna connected to the third branch through the fourth branch, so as to receive the signal through the receiving module in the second rf front-end module while detecting the transmitting power.
Therefore, no matter which antenna can realize power detection in any one of the 4 transmitting sub-modules, the structure reduces the number of designed directional couplers, reduces the area of a power detection circuit and reduces the manufacturing cost.
Fig. 10 is a schematic diagram of a hardware structure of a terminal according to 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 a power supply 1011. Those skilled in the art will appreciate that the mobile terminal architecture illustrated in fig. 10 is not intended to be limiting of mobile terminals, and that a mobile terminal may include more or fewer components than those illustrated, 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 rf unit 1001 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 1001 may be configured to receive and transmit signals during a message transmission or a call, and specifically, receive downlink resources from a base station and then process the received downlink resources to the processor 1010; in addition, the uplink resource is transmitted to the base station. In general, 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. Further, the radio frequency unit 1001 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 through the network module 1002, such as helping the user send and receive e-mails, browse webpages, access streaming media, and the like.
The audio output unit 1003 may convert an audio resource received by the radio frequency unit 1001 or the network module 1002 or stored in the memory 1009 into an audio signal and output as sound. Also, the audio output unit 1003 may also provide audio output related to a specific function performed by the mobile terminal 1000 (e.g., 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 an audio or video signal. The input Unit 1004 may include a Graphics Processing Unit (GPU) 10041 and a microphone 10042, the Graphics processor 10041 Processing image resources of still pictures or video obtained by an image capture device (e.g., a camera) in a video capture mode or an image capture mode. The processed image frames may be displayed on the display unit 1006. The image frames processed by the graphic processor 10041 may be stored in the memory 1009 (or other storage medium) or transmitted via the radio frequency unit 1001 or the network module 1002. The microphone 10042 can receive sound and can process such sound into an audio asset. The processed audio resource may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 1001 in case of a phone call mode.
The mobile terminal 1000 can also include at least one sensor 1005, 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 10061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 10061 and/or the backlight when the mobile terminal 1000 moves 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 1005 may also include a fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, etc., which will not be described in detail herein.
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 (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 1007 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 1007 includes a touch panel 10071 and other input devices 10072. The touch panel 10071, also referred to as a touch screen, may collect touch operations by a user on or near the touch panel 10071 (e.g., operations by a user on or near the touch panel 10071 using a finger, a stylus, or any other suitable object or attachment). The touch panel 10071 may include two parts, 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 1010, and receives and executes commands sent by the processor 1010. In addition, the touch panel 10071 may be implemented by various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 10071, the user input unit 1007 can include other input devices 10072. Specifically, the other input devices 10072 may include, but are not limited to, a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a track ball, a mouse, and a joystick, which are not described herein again.
Further, the touch panel 10071 can be overlaid on the display panel 10061, and when the touch panel 10071 detects a touch operation thereon or nearby, the touch operation is transmitted to the processor 1010 to determine the type of the touch event, and then the processor 1010 provides a corresponding visual output on the display panel 10061 according to the type of the touch event. Although in fig. 10, the touch panel 10071 and the display panel 10061 are two independent components for implementing the input and output functions of the mobile terminal, in some embodiments, the touch panel 10071 and the display panel 10061 may be integrated to implement the input and output functions of the mobile terminal, which is not limited herein.
The interface unit 1008 is an interface through which an external device is connected to the mobile terminal 1000. 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 1008 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 1000 or may be used to transmit resources between the mobile terminal 1000 and external devices.
The memory 1009 may be used to store software programs and various resources. The memory 1009 may mainly include a storage program area and a storage resource area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, and the like) 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 1009 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 1010 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 1009 and calling resources stored in the memory 1009, thereby integrally monitoring the mobile terminal. Processor 1010 may include one or more processing units; preferably, the processor 1010 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 1010.
The mobile terminal 1000 may further include a power supply 1011 (e.g., a battery) for powering the various components, and preferably, the power supply 1011 may be logically coupled to the processor 1010 via a power management system that provides power management functions to manage charging, discharging, and power consumption.
In addition, the mobile terminal 1000 includes some functional modules that are not shown, and are not 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 (11)
1. A power detection circuit for a terminal, comprising: the device comprises a radio frequency transceiving module and a detection module;
the detection module comprises a first radio frequency front end module and a first switch module; the radio frequency transceiver module is connected with the first switch module through the first radio frequency front-end module, and the first switch module is connected with at least two antennas of the terminal; wherein the content of the first and second substances,
the first switch module comprises a first branch provided with a first directional coupler and a plurality of second branches; the first directional coupler is connected with the radio frequency transceiving module;
the first radio frequency front end module comprises at least one transmitting submodule and at least one receiving submodule;
one end of the first branch is used for being connected with one of the at least one transmitting submodule; or switchably connected to a plurality of the at least one transmit sub-module; the other end of the first branch is used for being switchably connected with the at least two antennas;
one end of the second branch is used for being connected with one receiving submodule in the at least one receiving submodule or switchably connected with a plurality of receiving submodules in the at least one receiving submodule; the other end of the second branch is used for being switchably connected with the at least two antennas;
when a first transmitting sub-module in at least one transmitting sub-module in the first radio frequency front-end module sends a signal through a first antenna in the at least two antennas, the first transmitting sub-module is connected with the first antenna through the first branch.
2. The circuit of claim 1, wherein the total number of the first branches and the second branches is greater than or equal to 2 and less than or equal to the number of the antennas.
3. The circuit of claim 1, wherein the number of transmit sub-modules in the first rf front-end module is at least 1 and the number of receive sub-modules in the first rf front-end module is at least 3.
4. The circuit of claim 1, wherein the number of transmit sub-modules in the first rf front-end module is at least 3 and the number of receive sub-modules in the first rf front-end module is at least 3.
5. The circuit according to any of claims 1-4, wherein the first 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.
6. The circuit of claim 1, wherein the detection module further comprises: the second switch module and the second radio frequency front end module;
the radio frequency transceiver module is connected with the second switch module through the second radio frequency front-end module; and the second directional coupler in the second switch module is cascaded with the first directional coupler.
7. The circuit of claim 6, wherein the at least two antennas comprise a first set of antennas and a second set of antennas; wherein the content of the first and second substances,
the first group of antennas is connected with the first switch module;
the second group of antennas is connected with the second switch module;
the second switch module comprises a third branch provided with the second directional coupler and a plurality of fourth branches;
the second radio frequency front end module comprises at least one transmitting submodule and at least one receiving submodule;
one end of the third branch is used for being connected with one of at least one transmitting submodule in the second radio frequency front end module; or switchably connected with a plurality of transmitting sub-modules in at least one transmitting sub-module in the second radio frequency front end module; the other end of the third branch is used for being switchably connected with the second group of antennas;
one end of the fourth branch is used for being connected with one receiving submodule in at least one receiving submodule in the second radio frequency front end module, or switchably connected with a plurality of receiving submodules in at least one receiving submodule in the second radio frequency front end module; the other end of the fourth branch is used for being switchably connected with the second group of antennas.
8. The circuit of claim 7, wherein when a first transmit sub-module of at least one transmit sub-module of the first RF front end module transmits a signal via the first antenna of the first set of antennas, the first transmit sub-module is connected to the first antenna via the first branch.
9. The circuit of claim 7 or 8, wherein when a second transmit sub-module of the at least one transmit sub-module in the second rf front-end module transmits a signal via a second antenna of the second set of antennas, the second transmit sub-module is connected to the second antenna via the third branch.
10. The circuit of claim 9, wherein the first rf front-end module comprises a new air interface NR rf front-end module or a long term evolution LTE rf front-end module;
the second 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.
11. A terminal, comprising: the power detection circuit of any of claims 1-10.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910340892.2A CN110166146B (en) | 2019-04-25 | 2019-04-25 | Power detection circuit and terminal |
| PCT/CN2020/085647 WO2020216180A1 (en) | 2019-04-25 | 2020-04-20 | Power detection circuit and terminal |
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| CN201910340892.2A CN110166146B (en) | 2019-04-25 | 2019-04-25 | Power detection circuit and terminal |
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| CN110166146B true CN110166146B (en) | 2021-05-07 |
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| CN110166146B (en) * | 2019-04-25 | 2021-05-07 | 维沃移动通信有限公司 | Power detection circuit and terminal |
| CN113839681B (en) * | 2020-06-23 | 2022-11-04 | Oppo广东移动通信有限公司 | Radio frequency PA Mid device, radio frequency system and communication equipment |
| CN112187311B (en) * | 2020-09-27 | 2022-08-09 | Oppo广东移动通信有限公司 | Radio frequency system and communication device |
| CN114696841A (en) * | 2020-12-28 | 2022-07-01 | 北京小米移动软件有限公司 | Antenna switching device, terminal equipment, antenna switching method and system |
| CN113992231B (en) * | 2021-12-28 | 2022-06-17 | 荣耀终端有限公司 | Radio frequency transceiving module and electronic equipment |
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| CN108900234A (en) * | 2018-07-23 | 2018-11-27 | Oppo广东移动通信有限公司 | Receiving module, antenna switching control method and related product |
| CN109347508A (en) * | 2018-10-31 | 2019-02-15 | 维沃移动通信有限公司 | A kind of mobile terminal and power detecting method |
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| CN101998606B (en) * | 2009-08-25 | 2015-03-25 | 英派尔科技开发有限公司 | Antenna transmission power monitoring and/or control |
| TWI720213B (en) * | 2016-06-22 | 2021-03-01 | 美商天工方案公司 | Electromagnetic coupler arrangements for multi-frequency power detection, and devices including same |
| CN108880576A (en) * | 2018-07-20 | 2018-11-23 | 江苏卓达信息科技有限公司 | A kind of adjusting method of mobile terminal and antenna matching network |
| CN110166146B (en) * | 2019-04-25 | 2021-05-07 | 维沃移动通信有限公司 | Power detection circuit and terminal |
| CN110190916B (en) * | 2019-04-25 | 2021-03-23 | 维沃移动通信有限公司 | Power detection circuit and terminal |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108900234A (en) * | 2018-07-23 | 2018-11-27 | Oppo广东移动通信有限公司 | Receiving module, antenna switching control method and related product |
| CN109347508A (en) * | 2018-10-31 | 2019-02-15 | 维沃移动通信有限公司 | A kind of mobile terminal and power detecting method |
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