CN113992215A - Radio frequency front end transmitting module and adaptive adjusting method of out-of-band spurious emission thereof - Google Patents
Radio frequency front end transmitting module and adaptive adjusting method of out-of-band spurious emission thereof Download PDFInfo
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Abstract
The application relates to the technical field of mobile terminal radio frequency, and provides a radio frequency front end transmitting module and an out-of-band spurious self-adaptive adjusting method thereof, wherein the radio frequency front end transmitting module comprises the following components: a stray adaptive module and an MIPI control unit; the spurious adaptive module is arranged between the directional coupler and the antenna matching network, and the MIPI control unit is used for controlling the spurious adaptive module to adjust out-of-band spurious of the radio frequency front-end transmitting module. By adding the stray self-adaptive module in the original radio frequency front-end transmitting module, the out-of-band stray performance of the radio frequency front-end transmitting module is improved, extra manpower and time cost in the project debugging process are reduced, and the flexibility of debugging out-of-band stray is improved.
Description
Technical Field
The application relates to the technical field of mobile terminal radio frequency, in particular to a radio frequency front end transmitting module and an out-of-band spurious self-adaptive adjusting method thereof.
Background
A radio frequency front end transmitting module (FEM), which is one of core devices of a radio frequency front end design, includes a 2G cellular network Power Amplifier (PA), a radio frequency switch, a power directional coupler, an MIPI (Mobile Industry Processor Interface) control unit, a power supply module, and the like. The FEM is integrated with nonlinear devices such as a 2G PA and a radio frequency switch, so that signal harmonic stray is easily generated, and meanwhile, an internal power supply module and an MIPI control unit are also easily generated with non-useful signal stray. In the prior art, when the problem of out-of-band spurious of the FEM is debugged and optimized, the FEM is often debugged and matched with an antenna end, because the debugging is the matching of a public end of a radio frequency front end, all systems and all frequency bands can be tested and debugged again, the radio frequency performance of part of the frequency bands can be deteriorated, and a large amount of labor and time cost can be input; and if a plurality of frequency bands have the problem of spurious exceeding, a good suppression degree is difficult to achieve by debugging the matching between the FEM and the antenna end.
Disclosure of Invention
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a radio frequency front end transmitting module and an out-of-band spurs adaptive adjusting method thereof.
In a first aspect, an embodiment of the present application provides a radio frequency front end transmitting module, including: a stray adaptive module and an MIPI control unit; the spurious adaptive module is arranged between the directional coupler and the antenna matching network, and the MIPI control unit is used for controlling the spurious adaptive module to adjust out-of-band spurious of the radio frequency front-end transmitting module.
In one embodiment, the stray adaptation module includes a first capacitance C1, a second capacitance C2, a third capacitance C3, a fourth capacitance C4, a first inductance L1, a second inductance L2, a third inductance L3, a fourth inductance L4, and a bypass switch S1;
the signal output end of the directional coupler is respectively connected with one end of a first inductor L1, one end of a second inductor L2 and one end of a bypass switch S1; the other end of the second inductor L2 is connected with the ground through the second capacitor C2; the other end of the first inductor L1 is connected to one end of the first capacitor C1 and one end of the third inductor L3, respectively;
the other end of the third inductor L3 is connected with the ground through the third capacitor C3; the other end of the first capacitor C1 is connected to the fourth inductor L4, the other end of the bypass switch S1, and the input end of the antenna matching network, respectively; the fourth inductor L4 is connected to ground through the fourth capacitor C4.
In one embodiment, the MIPI control unit is configured to control capacitance values of the first, second, third and fourth capacitors C1, C2, C3 and C4;
the MIPI control unit is also used for controlling the inductance values of the first inductor L1, the second inductor L2, the third inductor L3 and the fourth inductor L4;
the MIPI control unit is also used for controlling the opening or closing of the bypass switch S1.
In a second aspect, an embodiment of the present application provides a method for adaptively adjusting an out-of-band spurious emission of a radio frequency front end transmitter module, where the method includes:
when the radio frequency front end transmitting module reaches the standard in the out-of-band stray of any working frequency band, a bypass switch in the stray self-adapting module is closed, and the radio frequency front end transmitting module achieves the best radio frequency performance state by adjusting an antenna matching network between the radio frequency front end transmitting module and an antenna;
when the out-of-band stray of the radio frequency front end transmitting module in any working frequency band exceeds the standard, a bypass switch in the stray adaptive module is turned on, and the stray adaptive module is controlled by the MIPI control unit to adjust the out-of-band stray of the radio frequency front end transmitting module.
In one embodiment, controlling the spur adaptation module to adjust out-of-band spurs of the rf front-end transmission module by the MIPI control unit specifically includes:
and adjusting the register value of the MIPI control unit, and selecting a pi-type low-pass filter network, a pi-type high-pass filter network or a Notch network in the spurious self-adaptive module to suppress spurious.
In one embodiment, when the values of the second inductor L2 and the third inductor L3 are 0, the first capacitor C1 is a large capacitor, and the fourth inductor L4 is a large inductor, the second capacitor C2, the first inductor L1, and the third capacitor C3 form a pi-type low-pass filter network;
when the second inductor L2 is a large inductor, the first inductor L1 is 0, and the third capacitor C3 and the fourth capacitor C4 are large capacitors, the third inductor L3, the first capacitor C1, and the fourth inductor L4 form a pi-type high-pass filter network.
In one embodiment, the second inductor L2 and the second capacitor C2 form a first Notch network; the third inductor L3 and the third capacitor C3 form a second Notch network; the fourth inductor L4 and the fourth capacitor C4 form a third Notch network.
In one embodiment, the controlling, by the MIPI control unit, the spur adaptation module to adjust the out-of-band spur of the rf front-end transmission module further includes:
when the register value of the MIPI control unit is adjusted to enable the out-of-band spurious emission of the radio frequency front end emission module to reach the standard, the register value is the optimal matching value of the radio frequency front end emission module for suppressing spurious emission in the working frequency band, and the register value is stored in software parameters of the communication equipment.
In a third aspect, an embodiment of the present application provides a mobile terminal device, including a memory and a processor, where the memory stores a computer program, and the processor implements, when executing the computer program, the steps of the method for adaptively adjusting an out-of-band spurious emission of a radio frequency front end transmitter module provided in any embodiment of the present application.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium, on which a computer program is stored, where the computer program, when executed by a processor, implements the steps of the method for adaptive adjustment of out-of-band spurs for a radio frequency front end transmitter module provided in any embodiment of the present application.
The radio frequency front end transmitting module, the out-of-band spurious adaptive module thereof, the mobile terminal device and the computer readable storage medium provided by the embodiment of the application improve the out-of-band spurious performance of the FEM by adding the spurious adaptive module in the original FEM module, reduce extra manpower and time cost in the project debugging process and improve the flexibility of debugging the out-of-band spurious. Further, according to some embodiments of the present application, the frequency response of the capacitor and the inductor to high frequency signals is utilized to realize the open circuit and the short circuit of the circuit, thereby reducing the complexity of the stray adaptive module.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a simplified structural diagram of a conventional rf front-end transmitting module FEM;
fig. 2 is a schematic structural diagram of a conventional rf front-end transmitting module connected to an antenna through an antenna matching network;
fig. 3 is a schematic structural diagram of a radio frequency front end transmitting module connected to an antenna through an antenna matching network according to an embodiment of the present application;
FIG. 4 is an exemplary block diagram of a spur adaptation module provided by an embodiment of the present application;
fig. 5 is a flowchart of a method for adaptive adjustment of out-of-band spurious emissions of a radio frequency front end transmitter module according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a mobile terminal device according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Because the internal 2G PA (Power Amplifier) and the radio frequency switch are both nonlinear devices, a signal enters the nonlinear devices such as the 2G PA signal amplification and the radio frequency switch from the input end of the FEM, and then generates an undesired signal such as sideband stray or harmonic stray, and meanwhile, the internal Power supply module and the MIPI control unit of the FEM module also generate an undesired signal, and the undesired signal interferes with other systems or normal use of users. As shown in fig. 1, the FEM module simplified diagram includes a 2G cellular network Power Amplifier (PA), a radio frequency switch (ANTENNA SWITCH), a Power DIRECTIONAL COUPLER (directive COUPLER), a MIPI control unit (CMOS Power Amplifier Controller), and other modules, and a simple schematic diagram of a radio frequency front end transmitting module can be obtained by the FEM module 100 external antenna 300 and the antenna matching network 200, as shown in fig. 2. In fig. 2, the output terminal of the power directional coupler 110 in the FEM module 100 is directly connected to the antenna 300 through the antenna matching network 200.
The antenna matching network 200 is composed of capacitors C5, C6, C7 and inductors L5, L6, and the antenna matching network 200 can pull impedance mismatch between the FEM module 100 and the antenna 300 due to Layout and the like back to 50 ohm impedance, and can realize a low pass filter function. For example, C5 and L5 are used for adjusting impedance mismatch, so that the radio frequency performance index reaches the optimal state; c6, L6 and C7 are regarded as pi low-pass filter networks to realize the low-pass filter function, and out-of-band spurious generated by the radio frequency front-end transmitting module, including second harmonic, third harmonic and other non-useful signals, is filtered. However, as mentioned above, debugging and matching at the public end of the radio frequency front end may cause that all systems and all frequency bands need to be tested and debugged again, and may cause that the radio frequency performance of a part of frequency bands deteriorates, so that a large amount of labor and time costs are required to be invested, and if there is a problem that a plurality of frequency bands are stray and exceed standards at the same time, it is difficult to achieve a good suppression degree by debugging and matching between the FEM module 100 and the antenna 300.
In order to solve the technical problem of the FEM out-of-band spurs or harmonic spurs, an embodiment of the present application provides a radio frequency front end transmitting module 100 with spur adaptive adjustment, including: a spur adaptation module 120 and a MIPI control unit 130; wherein the spur adaptation module 120 is disposed between the directional coupler 110 and the antenna matching network 200, and the MIPI control unit 130 is configured to control the spur adaptation module 120 to adjust out-of-band spur of the rf front-end transmission module 100.
Specifically, as shown in fig. 3, in the radio frequency front end transmitting module 100 provided in this embodiment of the present application, a spurious adaptive module 120 is added inside an original FEM module to form a new FEM module, that is, the structures of modules inside the original FEM module, such as a power amplifier, a radio frequency switch, a directional coupler, and an MIPI control unit, remain unchanged, and a spurious adaptive module 120 is arranged at an output end of the directional coupler and connected to an input end of the antenna matching network 200. The original MIPI control unit 130 in the FEM module controls the stray self-adaptive module 120 to adjust the out-of-band stray of the radio frequency front-end transmitting module 100, and extra out-of-band rejection is provided according to the problem of the out-of-band stray of different frequency bands. It should be noted that, according to actual requirements, a separate MIPI control unit 130 for controlling the spur adaptation module 120 may be provided.
In one embodiment, the stray adaptation module 120 includes a first capacitance C1, a second capacitance C2, a third capacitance C3, a fourth capacitance C4, a first inductance L1, a second inductance L2, a third inductance L3, a fourth inductance L4, and a bypass switch S1;
the signal output end of the directional coupler 110 is connected to one end of the first inductor L1, one end of the second inductor L2, and one end of the bypass switch S1; the other end of the second inductor L2 is connected with the ground through the second capacitor C2; the other end of the first inductor L1 is connected to one end of the first capacitor C1 and one end of the third inductor L3, respectively;
the other end of the third inductor L3 is connected with the ground through the third capacitor C3; the other end of the first capacitor C1 is connected to the other ends of the fourth inductor L4 and the bypass switch S1, respectively, and to the input end of the antenna matching network 200; the fourth inductor L4 is connected to ground through the fourth capacitor C4.
Specifically, the stray adaptation module 120 is composed of a series of variable capacitors (C1, C2, C3, C4), variable inductors (L1, L2, L3, L4), and a Bypass switch S1(Bypass switch). The specific structure and function of the antenna matching network 200 are as described above, and are not described in detail in this application.
In one embodiment, the MIPI control unit 130 is configured to control capacitance values of the first, second, third and fourth capacitors C1, C2, C3 and C4; the MIPI control unit 130 is further configured to control inductance values of the first inductor L1, the second inductor L2, the third inductor L3, and the fourth inductor L4; the MIPI control unit 130 is also configured to control the opening or closing of the bypass switch S1.
Specifically, as shown in fig. 4, the stray adaptation module 120 is composed of a series of variable capacitors (C1, C2, C3, and C4), variable inductors (L1, L2, L3, and L4), and a Bypass switch S1(Bypass switch), and the capacitance value of the variable capacitor, the inductance value of the variable inductor, and the on or off of the Bypass switch S1 are controlled 130 by an own MIPI control unit in the original FEM module, so as to provide additional out-of-band rejection according to the out-of-band stray problem of different frequency bands.
In one embodiment, an out-of-band spur adaptive adjustment method for a radio frequency front end transmission module is provided, which utilizes the radio frequency front end transmission module 100 with the spur adaptive module 120 inside; the method comprises the following steps:
when the rf front-end transmitting module 100 is in the out-of-band spurious calibration of any working frequency band, the bypass switch S1 in the spurious adaptive module 120 is closed, and the rf front-end transmitting module 100 is brought to the optimal rf performance state by adjusting the antenna matching network 200 between the rf front-end transmitting module 100 and the antenna;
when the out-of-band spurious of the rf front-end transmitting module 100 in any operating frequency band exceeds the standard, the bypass switch S1 in the spurious adaptive module 120 is turned on, and the MIPI control unit 130 controls the spurious adaptive module 120 to adjust the out-of-band spurious of the rf front-end transmitting module 100.
Specifically, the specific structure of the rf front-end transmitting module 100 and the specific structure of the spurious adaptive module 120, in which the spurious adaptive module is disposed, are as described above, and in a default case, if there is no spurious problem in the working frequency band of the communication device, the Bypass switch S1(Bypass switch) is in a closed state, and the spurious adaptive module 120Bypass makes the rf front-end transmitting module 100 achieve the best rf performance state by adjusting the antenna matching network 200 between the new FEM module 100 and the antenna 300. When the spurious signal in a certain working frequency band is found to exceed the standard in the test process, the bypass switch S1 in the spurious adaptive module 120 is turned on, and the MIPI control unit 130 controls the spurious adaptive module 120 to suppress the out-of-band spurious signal of the rf front-end transmission module 100. Because the frequency band default configuration that the spurious test is up to standard is the Bypass state, and the frequency band that the spurious test exceeds standard just can call spurious adaptive module 120 to restrain spurious, because the frequency band access matching network that the spurious test is up to standard (pass) does not have any change, so the radio frequency performance index of these frequency bands need not test again, can save a large amount of manpowers and time cost like this, especially in the project later stage, can guarantee the smooth volume production of project.
In one embodiment, controlling the spur adaptation module 120by the MIPI control unit 130 to adjust out-of-band spurs of the rf front-end transmission module 100 specifically includes:
the register value of the MIPI control unit 130 is adjusted, and a pi-type low-pass filter network, a pi-type high-pass filter network, or a Notch network in the spur adaptation module 120 is selected to suppress the spur.
Specifically, as shown in fig. 4, in the spur adaptation module 120, L2/C2, L3/C3, and L4/C4 are three frequency-adjustable Notch networks, which may be used to suppress harmonic interference signals generated by a transmitter or other single-point interference signals, and parameters of each Notch network may be independently controlled by the MIPI control unit 130 without interfering with each other. Because L2/C2, L3/C3 and L4/C4 are adjustable, the resonant frequency, the suppression degree and the working bandwidth of each Notch network are adjustable, and interference frequency points can be flexibly suppressed.
The capacitance and the inductance have unique frequency response characteristics, for high-frequency signals, when the inductance has a large inductance value, such as L > 68NH, the circuit is equivalent to an open circuit, and when the inductance has a small inductance value, such as L is close to 0NH, the circuit is equivalent to a short circuit; when the capacitance is small, for example, C is close to 0pF, the circuit is open, and when the capacitance is large, for example, C > 22pF, the circuit is short.
By utilizing the frequency response characteristics of the capacitor and the inductor, when the values of L2/L3 are all 0, C1 is large capacitor and L4 is large inductor, C2/L1/C3 forms a CLC pi-type low-pass filter network, and because C2/L1/C3 is adjustable, the suppression degree and the working bandwidth of the low-pass filter network are adjustable, and the interference signals can be flexibly suppressed.
When L2 is large inductance, L1 is 0, and C3/C4 is large capacitance, L3/C1/L4 forms an LCL pi-type high-pass filter network, and because L3/C1/L4 is adjustable, the suppression degree and the working bandwidth of the high-pass filter network are adjustable, and interference signals can be flexibly suppressed.
Because each frequency band with the stray exceeding standard can independently debug the filter network and the frequency bands are not interfered with each other, the stray suppression capability is better and more flexible than the existing scheme.
In one embodiment, controlling the spur adaptation module 120by the MIPI control unit 130 to adjust the out-of-band spur of the rf front-end transmission module 100 further includes:
when the adjusted register value of the MIPI control unit 130 makes the out-of-band spurs of the rf front-end transmitting module 100 reach the standard, the register value is the best matching value for the rf front-end transmitting module 100 to suppress spurs in the operating frequency band, and the register value is stored in the software parameters of the communication device.
Specifically, when the communication device works in a certain frequency band in actual work, the corresponding frequency band configuration parameters are called, and at this time, the out-of-band spurs of the working frequency band are in an optimal state. After all band parameters are debugged, the communication device may adaptively invoke the already debugged filter network parameters (i.e., the best matching register values of MIPI control unit 130) to suppress out-of-band spurs.
In one embodiment, the rf front end transmit module 100 is a FEM, PAMID, or LPAMID, which improves the out-of-band rejection capability of these transmit modules.
In an embodiment, as shown in fig. 5, the present application provides a complete workflow of an out-of-band spurious adaptive adjustment method for a radio frequency front end transmitting module 100, specifically: under the default condition, when M frequency bands of the communication device are found to be stray and reach the standard in the test process, that is, the working frequency band of the communication device has no stray problem, the Bypass switch S1(Bypass switch) is in a closed state, the stray adaptive module 120Bypass enables the radio frequency front end transmission module 100 to reach the best radio frequency performance state by adjusting the antenna matching network 200 between the new FEM module 100 and the antenna 300.
When the fact that the spurious emission of the communication equipment has N frequency bands exceeds the standard is found in the test process, one working frequency band is selected, the register value of the MIPI control unit 130 is adjusted, the pi-type low-pass filter network, the pi-type high-pass filter network or the Notch network is selected to suppress the spurious emission, specific capacitance values and inductance values can be determined to approximate values through simple simulation, then values in registers are configured through actual debugging until the spurious emission test reaches the standard (pass), the register value at the moment is the best matching value for suppressing the spurious emission of the frequency bands, the best matching value is configured in software parameters of the communication equipment, and when the communication equipment actually works, if the communication equipment just works in the frequency bands, the best matching value of the registers configured in the software parameters is called, and the spurious adaptive module 120 is adjusted to the best spurious emission consistent state. And debugging the frequency bands one by one according to the process until all the frequency band spurious tests reach the standard (pass).
In one embodiment, a mobile terminal device is provided, the internal structure of which may be as shown in fig. 6. The mobile terminal device includes a processor, a memory, a communication interface, a display screen, and an input device connected through a system bus. Wherein the processor of the mobile terminal device is adapted to provide computing and control capabilities. The memory of the mobile terminal device comprises a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of an operating system and computer programs in the non-volatile storage medium. The communication interface of the mobile terminal device is used for carrying out wired or wireless communication with an external terminal, and the wireless communication can be realized through WIFI, an operator network, Near Field Communication (NFC) or other technologies. The computer program is executed by a processor to implement a method for adaptive adjustment of out-of-band spurs for a radio frequency front end transmit module. The display screen of the mobile terminal equipment can be a liquid crystal display screen or an electronic ink display screen, and the input device of the mobile terminal equipment can be a touch layer covered on the display screen, a key, a track ball or a touch pad arranged on the shell of the mobile terminal equipment, an external keyboard, a touch pad or a mouse and the like.
It will be understood by those skilled in the art that the structure shown in fig. 6 is a block diagram of only a part of the structure related to the present application, and does not constitute a limitation of the mobile terminal device to which the present application is applied, and a specific mobile terminal device may include more or less components than those shown in the figure, or combine some components, or have a different arrangement of components.
In one embodiment, the rf front-end transmitting module 100 provided in the present application may be implemented in a form of a computer program, and the computer program may be run on a mobile terminal device as shown in fig. 6. The memory of the mobile terminal device may store various program modules that make up the rf front-end transmission module 100, such as the spur adaptation module 120 shown in fig. 4. The program modules constitute computer programs to make the processor execute the steps of the adaptive adjusting method for out-of-band spurs of the radio frequency front end transmitting module in the embodiments of the present application described in the present specification.
For example, when the rf front-end transmitting module 100 reaches the standard in the out-of-band spurious of any operating frequency band, the mobile terminal device shown in fig. 6 may adjust the antenna matching network 200 shown in fig. 3 to make the rf front-end transmitting module 100 reach the best state of the rf performance; when the out-of-band spurious of the rf front-end transmitting module 100 in any operating frequency band exceeds the standard, the mobile terminal device shown in fig. 6 may adjust the out-of-band spurious of the rf front-end transmitting module 100 by adjusting the spurious adaptive module 120 shown in fig. 4.
In one embodiment, a mobile terminal device is provided, comprising a memory storing a computer program and a processor, which when executing the computer program, implements the following steps of the above-mentioned radio frequency front end transmission module out-of-band spur adaptive adjustment method.
In an embodiment, a computer-readable storage medium is also provided, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the above-mentioned method embodiments.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the embodiments provided herein may include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM is available in many forms, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), and the like.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A radio frequency front end transmit module, comprising: a stray adaptive module and an MIPI control unit; the spurious adaptive module is arranged between the directional coupler and the antenna matching network, and the MIPI control unit is used for controlling the spurious adaptive module to adjust out-of-band spurious of the radio frequency front-end transmitting module.
2. The radio frequency front end transmit module of claim 1, wherein the stray adaptation module comprises a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first inductor, a second inductor, a third inductor, a fourth inductor, and a bypass switch;
the signal output end of the directional coupler is respectively connected with the first inductor, the second inductor and one end of the bypass switch; the other end of the second inductor is connected with the ground through the second capacitor; the other end of the first inductor is connected with one end of the first capacitor and one end of the third inductor respectively;
the other end of the third inductor is connected with the ground through the third capacitor; the other end of the first capacitor is connected with the fourth inductor and the other end of the bypass switch respectively, and is connected with the input end of the antenna matching network; the fourth inductor is connected with the ground through the fourth capacitor.
3. The radio frequency front end transmission module according to claim 2, wherein the MIPI control unit is configured to control capacitance values of the first capacitor, the second capacitor, the third capacitor, and the fourth capacitor;
the MIPI control unit is also used for controlling the inductance values of the first inductor, the second inductor, the third inductor and the fourth inductor;
the MIPI control unit is also used for controlling the on or off of the bypass switch.
4. A method for adaptive adjustment of out-of-band spurs of a radio frequency front end transmitter module, using the radio frequency front end transmitter module of any one of claims 1 to 3, comprising:
when the radio frequency front end transmitting module reaches the standard in the out-of-band stray of any working frequency band, a bypass switch in the stray self-adapting module is closed, and the radio frequency front end transmitting module achieves the best radio frequency performance state by adjusting an antenna matching network between the radio frequency front end transmitting module and an antenna;
when the out-of-band stray of the radio frequency front end transmitting module in any working frequency band exceeds the standard, a bypass switch in the stray adaptive module is turned on, and the stray adaptive module is controlled by the MIPI control unit to adjust the out-of-band stray of the radio frequency front end transmitting module.
5. The method of claim 4, wherein the controlling the spur adaptation module by the MIPI control unit to adjust the out-of-band spur of the RF front-end transmitter module specifically comprises:
and adjusting the register value of the MIPI control unit, and selecting a pi-type low-pass filter network, a pi-type high-pass filter network or a Notch network in the spurious self-adaptive module to suppress spurious.
6. The adaptive adjusting method for out-of-band stray of radio frequency front end transmitting module according to claim 5, wherein when the values of the second inductor and the third inductor are 0, respectively, the first capacitor is a large capacitor, and the fourth inductor is a large inductor, the second capacitor, the first inductor and the third capacitor form a pi-type low pass filter network;
when the second inductor is a large inductor, the first inductor is 0, and the third capacitor and the fourth capacitor are large capacitors, the third inductor, the first capacitor and the fourth inductor form a pi-type high-pass filter network.
7. The adaptive adjusting method for out-of-band spurious emissions of a radio frequency front end transmitting module according to claim 5, wherein the second inductor and the second capacitor form a first Notch network; the third inductor and the third capacitor form a second Notch network; the fourth inductor and the fourth capacitor form a third Notch network.
8. The method as claimed in any of claims 5-7, wherein controlling the spur adaptation module to adjust the out-of-band spur of the rf front-end transmitter module by the MIPI control unit further comprises:
when the register value of the MIPI control unit is adjusted to enable the out-of-band spurious emission of the radio frequency front end emission module to reach the standard, the register value is the optimal matching value of the radio frequency front end emission module for suppressing spurious emission in the working frequency band, and the register value is stored in software parameters of the communication equipment.
9. A mobile terminal device comprising a memory and a processor, said memory storing a computer program, characterized in that said processor, when executing said computer program, implements the steps of the method for adaptive adjustment of out-of-band spurs for a radio frequency front end transmit module according to any of claims 4 to 8.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method for adaptive adjustment of an out-of-band spurs for a radio frequency front end transmit module as set forth in any one of claims 4 to 8.
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