CN114915315B - Radio frequency system and control method thereof - Google Patents
Radio frequency system and control method thereof Download PDFInfo
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- CN114915315B CN114915315B CN202210699492.2A CN202210699492A CN114915315B CN 114915315 B CN114915315 B CN 114915315B CN 202210699492 A CN202210699492 A CN 202210699492A CN 114915315 B CN114915315 B CN 114915315B
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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
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- 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
- H04B17/11—Monitoring; Testing of transmitters for calibration
- H04B17/12—Monitoring; Testing of transmitters for calibration of transmit antennas, e.g. of the amplitude or phase
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Abstract
The embodiment of the application discloses a radio frequency system and a control method thereof. The radio frequency system comprises: a function control circuit configured to output a first control signal, wherein the first control signal is used for indicating whether an advanced open loop function is enabled; the radio frequency transceiver is used for outputting a second control signal according to the first control signal after receiving the first control signal, and the second control signal is used for controlling the bidirectional coupling circuit to execute coupling operation or not; and, for outputting a radio frequency signal; the power amplifier is used for amplifying the radio frequency signals output by the radio frequency transceiver; the MIPI controller is used for outputting MIPI signals according to the second control signals, wherein the MIPI signals are used for controlling whether the bidirectional coupling circuit performs coupling operation or not; and the bidirectional coupling circuit is used for coupling the amplified radio frequency signals and outputting forward coupling signals, and coupling the reflected signals of the amplified radio frequency signals and outputting reverse coupling signals.
Description
Technical Field
The embodiment of the application relates to the field of information processing, in particular to a radio frequency system and a control method thereof.
Background
With the complexity of antenna design, various technologies have emerged, wherein the advent of Advanced Open Loop (advanced open loop) technology has greatly reduced the design difficulty of antennas.
The advanced open loop technology principle is to combine an antenna tuner (tuner) and a bi-directional coupler, based on a closed loop circuit scheme of feedback reception (FeedBack Receiver, FBRX), by analyzing the signal reflected from the antenna, the phase and amplitude information of the antenna can be monitored from time to time, and the antenna impedance can be dynamically adjusted by the antenna tuner, so as to achieve the optimal antenna state.
In practical applications, the effect of the existing advanced ring opening is found to be still further improved.
Disclosure of Invention
In order to solve any of the above technical problems, an embodiment of the present application provides a radio frequency system and a control method thereof.
In order to achieve the object of the embodiment of the present application, an embodiment of the present application provides a radio frequency system, including:
A function control circuit configured to output a first control signal, wherein the first control signal is used for indicating whether an advanced open loop function is enabled;
The first end of the radio frequency transceiver is connected with the function control circuit and is used for outputting a second control signal according to the first control signal after receiving the first control signal, and the second control signal is used for controlling whether the bidirectional coupling circuit performs coupling operation or not; and a second end of the radio frequency transceiver for outputting radio frequency signals;
The power amplifier is connected with the second end of the radio frequency transceiver and is used for amplifying the radio frequency signal output by the radio frequency transceiver;
the MIPI controller is connected with the third end of the radio frequency transceiver and is used for outputting a MIPI signal according to the second control signal, wherein the MIPI signal is used for controlling whether the bidirectional coupling circuit performs coupling operation or not;
The two-way coupling circuit is used for coupling the amplified radio frequency signals received through the first end of the two-way coupling circuit according to the MIPI signals to obtain forward coupling signals, and coupling the reflected signals of the amplified radio frequency signals received through the second end of the two-way coupling circuit to obtain reverse coupling signals and outputting the forward coupling signals and the reverse coupling signals through a coupling output end.
A control method of a radio frequency system, applied to the system described above, comprising:
Acquiring a current stray harassment mode of a radio frequency system;
If the current stray disturbance mode is a radiation stray disturbance RSE mode, generating indication information for starting an advanced open loop function; if the current stray disturbance mode is a conducted stray disturbance CSE mode, generating indication information for closing an advanced open loop function;
and sending a first control signal, wherein the first control signal carries the indication information.
One of the above technical solutions has the following advantages or beneficial effects:
The first control signal output by the function control circuit is utilized to realize the starting of the advanced open loop function, and the probability of passing the CSE test can be improved while the normal use of the advanced open loop function is ensured.
Additional features and advantages of embodiments of the application will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of embodiments of the application. The objectives and other advantages of embodiments of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the technical solution of the embodiments of the present application, and are incorporated in and constitute a part of this specification, illustrate and explain the technical solution of the embodiments of the present application, and not to limit the technical solution of the embodiments of the present application.
FIG. 1 is a schematic diagram of an application architecture of an advanced open loop technique;
FIG. 2 is a schematic diagram of a bi-directional coupler in the application architecture of FIG. 1;
Fig. 3 is a schematic diagram of a radio frequency system according to an embodiment of the present application;
FIG. 4 (a) is a schematic diagram of a bi-directional coupling circuit in the RF system shown in FIG. 3;
FIG. 4 (b) is a schematic diagram of an antenna in the RF system shown in FIG. 3;
FIG. 5 is another schematic diagram of the RF system of FIG. 3;
FIG. 6 (a) is a schematic diagram of the system of FIG. 5 in CSE mode;
FIG. 6 (b) is a schematic diagram of the system of FIG. 5 in RSE mode;
FIG. 7 (a) is a schematic diagram of a power supply mode of the function control circuit in the system shown in FIG. 5;
FIG. 7 (b) is another schematic diagram of the power supply mode of the function control circuit in the system shown in FIG. 5;
FIG. 8 is another schematic diagram of the system of FIG. 5;
FIG. 9 is a further schematic diagram of the system of FIG. 5;
Fig. 10 is a flowchart of a control method of a radio frequency system according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the embodiments of the present application will be described in detail hereinafter with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be arbitrarily combined with each other.
In the process of realizing the application, the related technology is subjected to technical analysis, and the prior technology is found to have at least the following problems:
fig. 1 is a schematic diagram of an application architecture of an advanced open loop technique. As shown in fig. 1, the advanced open loop technique works as follows:
Step 1, when a radio frequency transceiver transmits a radio frequency signal, a single-pole double-throw switch (Single Pole Double Throw, SPDT) is switched to a Forward port, and a bidirectional coupler measures the input power of an antenna port through an FBRX loop to acquire phase information of the amplitude of the transmitted signal, see a dotted line path diagram formed by points in fig. 1.
And 2, switching the SPDT to a reverse port, and measuring the reflected power of the antenna port by the bidirectional coupler through an FBRX loop to obtain the amplitude and phase information of the reflected signal, wherein the information is shown in a dotted line path diagram consisting of transverse lines in FIG. 1.
And step 3, switching to Open after the operation is finished, and calculating the ratio of the transmitting power to the reflecting power according to the input reflection coefficient S11 in the S parameter to obtain the indication information for determining the impedance information.
And 4, adjusting the antenna tuner according to the indication information to enable the input reflection parameter S11 to reach a target set value, so that the antenna is optimal.
The steps are circularly executed, so that the impedance is measured in real time and is regulated to the target antenna impedance, and the antenna performance reaches the optimal state.
Fig. 2 is a schematic diagram of a bi-directional coupler in the application architecture shown in fig. 1. As shown in fig. 2, the bi-directional coupler has 4 ports, i.e., an input port Pin, an output port Pout, a forward port Pforward, and a reverse port Preflect, respectively, i.e., signals are coupled via pins to Preflect or signals are coupled via Pout to Pforward.
Wherein, the forward Coupling degree (Coupling forward), the reverse Coupling degree (Coupling reflected), the through Coupling Degree (DIRECTIVITY) and the Coupling coefficient (Isolation) are calculated by adopting the following expression:
Coupling,forward:
Coupling,reflected:
Directivity:
lsolation:
in the Advanced Open Loop architecture shown in FIG. 1, the SPDT and antenna tuner are controlled by issuing MIPI commands, where the MIPI clock frequency may be 52MHz or 26MHz, which may vary from platform to platform. Furthermore, the SPDT switching operation occurs when the PA TX is still transmitting, and therefore, when the PA performs high power transmission, an instruction is sent on the MIPI bus.
According to the physical characteristics of PA, since PA is an active nonlinear device, when two signals F1, F2 are input, intermodulation signal IMD2 is generated, where IMD 2=f1+f2.
Taking the architecture shown in fig. 1 as an example, the TX signal is F1 and MIPI CLK is F2. Although the MIPI CLK signal is not coming in from the PA input, intermodulation signal IMD2 is still easily formed. Therefore, when CSE (Conduct Spurious Emissions, conducted spurious disturbance) occurs, the CSE is tested at the board end, and the test operation is interfered by the influence of intermodulation signal IMD2 in the test operation, so that the test result of the test operation is inaccurate, and when RSE (Radiated Spurious Emission, radiated spurious disturbance) occurs, the RSE is tested by antenna radiation, so that the test operation is not influenced by intermodulation signal IMD2, and the test result is more accurate than the CSE test operation.
Due to the mechanism, in the actual test process, although the CSE is the same as the test standard of the RSE, the CES test result does not accord with the test standard, and the test result of the RSE accords with the standard because the interference signal exists in the CSE test process and the interference signal does not exist in the RSE test process.
In the process of implementing the scheme of the application, the reason for the phenomenon is found to be that:
Although the CSE is the same as the RSE test standard, the CSE is tested at the board end, and the RSE is tested by the antenna radiation, so there is a problem of antenna efficiency, so the finally tested value is smaller than the CSE, so the CSE test fails, and the RSE test passes.
Based on the above analysis, the present application proposes the following solution:
Fig. 3 is a schematic diagram of a radio frequency system according to an embodiment of the present application. As shown in fig. 3, the system includes a function control circuit configured to output a first control signal, wherein the first control signal is used to indicate whether an advanced open loop function is enabled;
The first end of the radio frequency transceiver is connected with the function control circuit and is used for outputting a second control signal according to the first control signal after receiving the first control signal, and the second control signal is used for controlling whether the bidirectional coupling circuit performs coupling operation or not; and a second end of the radio frequency transceiver for outputting radio frequency signals;
the Power Amplifier (PA) is used for amplifying the radio frequency signal output by the radio frequency transceiver;
the MIPI controller is connected with the third end of the radio frequency transceiver and is used for outputting a MIPI signal according to the second control signal, wherein the MIPI signal is used for controlling whether the bidirectional coupling circuit performs coupling operation or not;
The two-way coupling circuit is used for coupling the amplified radio frequency signals received through the first end of the two-way coupling circuit according to the MIPI signals to obtain forward coupling signals, and coupling the reflected signals of the amplified radio frequency signals received through the second end of the two-way coupling circuit to obtain reverse coupling signals and outputting the forward coupling signals and the reverse coupling signals through a coupling output end.
As can be seen from fig. 1, compared with the system shown in fig. 1, the radio frequency system shown in fig. 3 is additionally provided with a function control circuit, and the first control signal is outputted to control whether to enable the advanced open loop function.
Specifically, it is determined whether to enable the advanced open loop function based on the spurious nuisance mode used in the current test.
In the architecture shown in fig. 1, the test results appear as CES test results that do not meet the test criteria, while RSE test results meet the criteria. Therefore, when the current spurious disturbance mode is an RSE mode, the advanced open-loop function is started, and if the current spurious disturbance mode is a CSE mode, the advanced open-loop function is closed.
When the radio frequency system is in the RSE mode, the radio frequency system performs the following operations:
The function control circuit outputs a first control signal for enabling the advanced open loop function;
The radio frequency transceiver receives a first control signal for enabling the advanced open loop function and outputs a second control signal for controlling the bidirectional coupling circuit to perform a coupling operation to the MIPI controller;
the MIPI controller receives a second control signal for controlling the bidirectional coupling circuit to execute the coupling operation and controls the bidirectional coupling circuit to execute the coupling operation;
The bidirectional coupling circuit performs coupling operation to obtain a forward coupling signal and a reverse coupling signal, and outputs the forward coupling signal and the reverse coupling signal to the radio frequency transceiver;
The radio frequency transceiver performs an optimization operation of the antenna performance based on the forward coupled signal and the reverse coupled signal.
From the above processing procedure, the function control circuit enables the advanced open loop function when the radio frequency system is in the RSE mode, so that the radio frequency system can optimize the antenna performance by using the advanced open loop function.
When the radio frequency system is in the CSE mode, the radio frequency system performs the following operations:
the function control circuit outputs a first control signal for closing the advanced open loop function;
The radio frequency transceiver receives a first control signal for closing an advanced open loop function and outputs a second control signal for controlling the bidirectional coupling circuit not to perform a coupling operation to the MIPI controller;
The MIPI controller receives a second control signal for controlling the bidirectional coupling circuit not to execute the coupling operation and controls the bidirectional coupling circuit to stop executing the coupling operation;
Because the bidirectional coupling circuit stops executing coupling operation, the MIPI controller does not need to communicate with the bidirectional coupling circuit, and the MIPI clk signal will not exist in the PA-MID (PA Module INTEGRATED WITH Duplexer, PA filter integration Module), therefore, when the PA amplifies the TX signal, only amplified transmitting signals exist on the radio frequency transmitting path, intermodulation signals are not generated, the intermodulation signals are reduced, and the probability of CSE test passing is improved.
Based on the analysis, the system provided by the embodiment of the application realizes the starting of the advanced open loop function by using the first control signal output by the function control circuit, and can improve the probability of passing the CSE test while ensuring the normal use of the advanced open loop function.
Fig. 4 (a) is a schematic diagram of a bi-directional coupling circuit in the rf system shown in fig. 3. As shown in fig. 4 (a), the bidirectional coupling circuit includes a first switching device and a bidirectional coupler, wherein:
The control end of the first switching device is connected with the MIPI controller, the first switching device is provided with two first ends and one second end, wherein one first end of the first switching device is connected with the forward coupling port of the bidirectional coupler, the other first end of the first switching device is connected with the backward coupling port of the bidirectional coupler, the second end of the first switching device is connected with the fourth end of the radio frequency transceiver, and the second end of the first switching device is used for controlling the first end of the first switching device and the second end of the first switching device to be in a conducting state according to the MIPI signal output by the MIPI controller;
The input port of the bidirectional coupler is connected with the power amplifier, the output port of the bidirectional coupler is connected with the antenna, and the bidirectional coupling unit is used for receiving the amplified radio frequency signal through the input port and outputting the amplified radio frequency signal through the output port; the forward coupling port of the bidirectional coupler is used for coupling the radio frequency signals and outputting forward coupling signals; and the reverse coupling port of the bidirectional coupler is used for coupling the reflected signal of the radio frequency signal and outputting a reverse coupling signal.
The structural description of the bidirectional coupler can be seen from the related description shown in fig. 2. The first switching device may be an SPDT.
Specifically, after the MIPI controller outputs the MIPI signal for controlling the bidirectional coupling circuit to perform the coupling operation, the first switching device performs the switching operation, that is, after a first end of the first switching device is controlled to be in a conductive state with a second end of the first switching device, another first end of the first switching device is controlled to be in a conductive state with the second end of the first switching device.
The output of the forward coupling signal and the reverse coupling signal is realized by the switching operation of the first switching device.
Fig. 4 (b) is a schematic diagram of an antenna in the rf system shown in fig. 3. As shown in fig. 4 (b), a fifth end of the radio frequency transceiver is connected to the antenna, and is configured to output a third control signal according to the forward coupling signal and the reverse coupling signal, where the third control signal is configured to control a tuner of the antenna to perform an impedance adjustment operation;
the antenna is used for executing impedance adjustment operation by using the tuner according to the third control signal.
Specifically, after the radio frequency transceiver obtains the optimization information of the antenna performance according to the forward coupling signal and the reverse coupling signal, the optimization information of the antenna performance is sent through a third control signal, so that the optimization operation of the antenna performance is realized.
Fig. 5 is another schematic diagram of the rf system shown in fig. 3. As shown in fig. 5, the first end of the function control circuit is connected to the second end of the bidirectional coupling circuit, and the second end of the function control circuit is connected to the antenna, where a connection point is disposed on a line between the first end of the function control circuit and the second end of the bidirectional coupling circuit, and the connection point is connected to the first end of the radio frequency transceiver.
Fig. 6 (a) is a schematic diagram of the system of fig. 5 in CSE mode. As shown in fig. 6 (a), a function control circuit controls the circuit of the bi-directional coupling to be in an off state with the antenna, and the first control signal is used to indicate that the advanced open loop function is not enabled.
When the two-way coupling circuit and the antenna are in a disconnection state, no voltage exists between the first end of the function control circuit and the first end of the radio frequency transceiver, the radio frequency transceiver determines that the current stray harassment mode is a CSE mode through the low level received by the first end of the radio frequency transceiver, an MIPI instruction is stopped or not sent, the Advanced Open Loop function is closed, and the phenomenon that an intermodulation signal is generated between an MIPI signal and the radio frequency signal, so that the CSE index is deteriorated is avoided.
Fig. 6 (b) is a schematic diagram of the system of fig. 5 in RSE mode. As shown in fig. 6 (b), the function control circuit outputs a first control signal for instructing to enable the advanced open loop function, controlling the circuit of the bidirectional coupling to be in a closed state with the antenna.
When the two-way coupling circuit and the antenna are in a closed state, the first end of the function control circuit is conducted to the first end of the radio frequency transceiver, the radio frequency transceiver determines that the current stray disturbance mode is an RSE mode through the high level received by the first end of the radio frequency transceiver, an MIPI instruction is sent, a Advanced Open Loop function is started, and the MIPI controller controls the two-way coupling circuit to execute coupling operation so as to optimize the antenna performance.
As can be seen from fig. 6 (a) and fig. 6 (b), the control function is used to control whether the circuit of the bidirectional coupling is conducted with the antenna to control whether the advanced open loop function is started, so that the radio frequency transceiver device can conveniently recognize the mode, and the correct use of the advanced open loop function can be ensured.
For example, when the function control circuit controls the bidirectional coupling circuit to be in a disconnection state with the antenna, if the radio frequency transceiver misjudges that the level received by the third terminal is a high level, the bidirectional coupling circuit is triggered to execute coupling operation.
As can be seen from the above examples, in the case of misjudgment of the radio frequency transceiver, the function control circuit is disposed on the line between the bi-directional coupling circuit and the antenna, and the function control circuit is used to control whether to enable the advanced open loop function by using whether to turn on the line between the bi-directional coupling circuit and the antenna, so as to achieve the required control purpose.
Furthermore, the function control circuit is arranged at a position corresponding to the CSE test point, so that control is convenient during CSE test operation.
Further, the function control circuit comprises a second switching device, a first end of the second switching device is connected with a second end of the bidirectional coupling circuit, a second end of the second switching device is connected with the antenna, and the function control circuit is used for controlling whether the first end of the second switching device and the second end of the second switching device are in a conducting state or not.
The second switching device is used for controlling the conducting state, so that the implementation is simple and the hardware cost is low.
Fig. 7 (a) is a schematic diagram of a power supply mode of the function control circuit in the system shown in fig. 5. As shown in fig. 7 (a), the second switching device is connected to a PMIC (Power manage IC, power management chip).
And the PMIC is utilized to provide direct-current voltage for the second switching device, so that unified control of power supply in the radio frequency system is realized, and power supply management is facilitated.
Fig. 7 (b) is another schematic diagram of the power supply mode of the function control circuit in the system shown in fig. 5. As shown in fig. 7 (b), the second switching device is connected to a power supply path of a radio frequency front end device provided on the power amplifier.
The power supply channel in the PA-MID is utilized to provide direct current power supply for the second switching device, so that the circuit layout space can be optimized, and the integration level of hardware is improved.
Fig. 8 is another schematic diagram of the system of fig. 5. As shown in fig. 8, the function control circuit further includes:
One end of the first capacitor is connected with the second end of the bidirectional coupling circuit, and the other end of the first capacitor is connected with the connecting point;
And/or the number of the groups of groups,
A second capacitor; one end of the second capacitor is connected with the second end of the second switching device, and the other end of the second capacitor is connected with the antenna.
The first capacitor and/or the second capacitor serve as blocking capacitors, and the situation that direct current voltage flows through a connecting point is reduced, so that the influence on the level received by the radio frequency transceiver is reduced, and the occurrence of misjudgment of the level by the radio frequency transceiver is reduced.
Fig. 9 is a further schematic diagram of the system shown in fig. 5. As shown in fig. 9, the function control circuit further includes:
and one end of the inductor is connected with the third end of the radio frequency transceiver, and the other end of the inductor is connected with the connecting point.
Specifically, the inductor is in a high impedance state to the radio frequency signal, and prevents the radio frequency signal from flowing in, so that the normal signal output of the function control circuit is ensured.
Fig. 10 is a flowchart of a control method of a radio frequency system according to an embodiment of the present application. As shown in fig. 10, the method is applied to the system described above, including:
step 1001, acquiring a current stray harassment mode of a radio frequency system;
Step 1002, if the current stray disturbance mode is an RSE mode, generating indication information for enabling an advanced open loop function; if the current stray disturbance mode is a CSE mode, generating indication information for closing an advanced open loop function;
step 1003, sending a first control signal, wherein the first control signal carries the indication information.
According to the method provided by the embodiment of the application, the first control signal output by the function control circuit is utilized to realize the starting of the advanced open-loop function, so that the probability of passing the CSE test can be improved while the normal use of the advanced open-loop function is ensured.
Further, before the current stray harassment mode of the radio frequency system is obtained, the method further includes:
If the current stray disturbance mode is an RSE mode, controlling a second switching device to be in a conducting state; and if the current stray disturbance mode is a CSE mode, controlling the second switching device to be in an off state.
Under the condition of misjudgment of the radio frequency transceiver, the function control circuit is arranged on a line between the bidirectional coupling circuit and the antenna, and whether the function control circuit conducts the line between the bidirectional coupling circuit and the antenna is used for controlling whether the advanced open loop function is started or not, so that the required control purpose can be achieved.
Those of ordinary skill in the art will appreciate that all or some of the steps, systems, functional modules/units in the apparatus, and methods disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof. In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the components may be implemented as software executed by a processor, such as a digital signal processor or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
Claims (10)
1. A radio frequency system comprising:
A function control circuit configured to output a first control signal according to a current spurious harassment mode of the radio frequency system, wherein the first control signal is used for indicating whether an advanced open loop function is enabled;
The first end of the radio frequency transceiver is connected with the function control circuit and is used for outputting a second control signal according to the first control signal after receiving the first control signal, and the second control signal is used for controlling whether the bidirectional coupling circuit performs coupling operation or not; and a second end of the radio frequency transceiver for outputting radio frequency signals;
The power amplifier is connected with the second end of the radio frequency transceiver and is used for amplifying the radio frequency signal output by the radio frequency transceiver;
the MIPI controller is connected with the third end of the radio frequency transceiver and is used for outputting a MIPI signal according to the second control signal, wherein the MIPI signal is used for controlling whether the bidirectional coupling circuit performs coupling operation or not;
The two-way coupling circuit is used for coupling the amplified radio frequency signals received through the first end of the two-way coupling circuit according to the MIPI signals to obtain forward coupling signals, and coupling the reflected signals of the amplified radio frequency signals received through the second end of the two-way coupling circuit to obtain reverse coupling signals and outputting the forward coupling signals and the reverse coupling signals through a coupling output end.
2. The system of claim 1, wherein the bi-directional coupling circuit comprises a first switching device and a bi-directional coupler, wherein:
The control end of the first switching device is connected with the MIPI controller, the first switching device is provided with two first ends and one second end, wherein one first end of the first switching device is connected with the forward coupling port of the bidirectional coupler, the other first end of the first switching device is connected with the backward coupling port of the bidirectional coupler, the second end of the first switching device is connected with the fourth end of the radio frequency transceiver, and the second end of the first switching device is used for controlling the first end of the first switching device and the second end of the first switching device to be in a conducting state according to the MIPI signal output by the MIPI controller;
The input port of the bidirectional coupler is connected with the power amplifier, the output port of the bidirectional coupler is connected with the antenna, and the bidirectional coupling unit is used for receiving the amplified radio frequency signal through the input port and outputting the amplified radio frequency signal through the output port; the forward coupling port of the bidirectional coupler is used for coupling the radio frequency signals and outputting forward coupling signals; and the reverse coupling port of the bidirectional coupler is used for coupling the reflected signal of the radio frequency signal and outputting a reverse coupling signal.
3. The system according to claim 1, wherein:
The fifth end of the radio frequency transceiver is connected with the antenna and is used for outputting a third control signal according to the forward coupling signal and the reverse coupling signal, and the third control signal is used for controlling a tuner of the antenna to execute impedance adjustment operation;
the antenna is used for executing impedance adjustment operation by using the tuner according to the third control signal.
4. A system according to any one of claims 1 to 3, wherein:
The first end of the function control circuit is connected with the second end of the bidirectional coupling circuit, the second end of the function control circuit is connected with the antenna, a connection point is arranged on a line between the first end of the function control circuit and the second end of the bidirectional coupling circuit, and the connection point is connected with the third end of the radio frequency transceiver;
Wherein, if the function control circuit controls the two-way coupled circuit to be in an off state with the antenna, the first control signal is used for indicating that an advanced open loop function is not started; the function control circuit controls the two-way coupling circuit and the antenna to be in a conducting state, and the first control signal is used for indicating to enable an advanced open loop function.
5. The system according to claim 4, wherein:
The function control circuit comprises a second switching device, wherein the first end of the second switching device is connected with the second end of the bidirectional coupling circuit, and the second end of the second switching device is connected with the antenna and used for controlling whether the first end of the second switching device and the second end of the second switching device are in a conducting state or not.
6. The system according to claim 5, wherein:
The second switching device is connected with a power management chip PMIC; or alternatively
The second switching device is connected with a power supply path of a radio frequency front-end device arranged on the power amplifier.
7. The system of claim 5, wherein the function control circuit further comprises:
One end of the first capacitor is connected with the second end of the bidirectional coupling circuit, and the other end of the first capacitor is connected with the connecting point;
And/or the number of the groups of groups,
A second capacitor; one end of the second capacitor is connected with the second end of the second switching device, and the other end of the second capacitor is connected with the antenna.
8. The system of claim 5, wherein the function control circuit further comprises:
and one end of the inductor is connected with the third end of the radio frequency transceiver, and the other end of the inductor is connected with the connecting point.
9. A control method of a radio frequency system, applied to the system according to any one of claims 1 to 7, comprising:
Acquiring a current stray harassment mode of a radio frequency system;
If the current stray disturbance mode is a radiation stray disturbance RSE mode, generating indication information for starting an advanced open loop function; if the current stray disturbance mode is a conducted stray disturbance CSE mode, generating indication information for closing an advanced open loop function;
and sending a first control signal, wherein the first control signal carries the indication information.
10. The method of claim 9, wherein prior to the acquiring the current spurious harassment pattern of the radio frequency system, the method further comprises:
If the current stray disturbance mode is an RSE mode, controlling a second switching device to be in a conducting state; and if the current stray disturbance mode is a CSE mode, controlling the second switching device to be in an off state.
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| CN110212877A (en) * | 2019-05-31 | 2019-09-06 | 维沃移动通信有限公司 | A kind of circuit control method, electronic equipment and radio circuit |
| CN110677160A (en) * | 2015-09-30 | 2020-01-10 | 天工方案公司 | Radio frequency module, control method thereof and wireless communication device |
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| CN113809997B (en) * | 2021-09-24 | 2024-07-23 | 维沃移动通信有限公司 | Power amplifier protection circuit, method and device and electronic equipment |
| CN114337722B (en) * | 2021-12-31 | 2024-05-10 | Oppo广东移动通信有限公司 | Coupling integrated device, radio frequency system and terminal equipment |
| CN114513216B (en) * | 2022-01-29 | 2024-05-24 | Oppo广东移动通信有限公司 | Radio frequency system and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110677160A (en) * | 2015-09-30 | 2020-01-10 | 天工方案公司 | Radio frequency module, control method thereof and wireless communication device |
| CN110212877A (en) * | 2019-05-31 | 2019-09-06 | 维沃移动通信有限公司 | A kind of circuit control method, electronic equipment and radio circuit |
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