CN112290971A - Circuit, control method, device, system and electronic equipment for suppressing intermodulation distortion - Google Patents
Circuit, control method, device, system and electronic equipment for suppressing intermodulation distortion Download PDFInfo
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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
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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
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B1/0475—Circuits with means for limiting noise, interference or distortion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1415—Two-way operation using the same type of signal, i.e. duplex using control lines
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1461—Suppression of signals in the return path, i.e. bidirectional control circuits
Abstract
The application relates to a circuit, a control method, a device, a system and an electronic device for suppressing intermodulation distortion. The circuit for suppressing intermodulation distortion comprises: one end of each trap module is grounded and is used for inhibiting different resonance components generated by intermodulation distortion under different working frequency bands; the first conducting module is arranged in a transmission channel of a radio frequency signal, and the other end of the first conducting module is electrically connected with the other ends of the plurality of notch modules respectively and used for selectively conducting a target notch module in the plurality of notch modules, and the conducted target notch module is used for suppressing a resonance component generated by intermodulation distortion under a target working frequency band. The circuit for suppressing the intermodulation distortion can improve the suppression effect of the intermodulation distortion.
Description
Technical Field
The present application relates to the field of radio frequency technologies, and in particular, to a circuit, a control method, an apparatus, a system, and an electronic device for suppressing intermodulation distortion.
Background
With the development of radio frequency technology, techniques for suppressing intermodulation distortion have emerged. Intermodulation distortion refers to the generation of new frequency components from two or more signals of different frequencies after they have passed through an amplifier or loudspeaker, and such distortion is usually caused by active devices (e.g., transistors, valves) in the circuit.
At present, in order to suppress intermodulation distortion, a notch module is usually added to the radio frequency path to suppress intermodulation distortion generated in the radio frequency path.
However, the applicant has found that the suppression of intermodulation distortion is currently less effective.
Disclosure of Invention
In view of the above, it is necessary to provide a circuit, a control method, an apparatus, a system, and an electronic device for suppressing intermodulation distortion, which can improve the effect of suppressing intermodulation distortion.
A circuit for suppressing intermodulation distortion, comprising:
one end of each trap module is grounded and is used for inhibiting different resonance components generated by intermodulation distortion under different working frequency bands;
the first conducting module is arranged in a transmission channel of a radio frequency signal, and the other end of the first conducting module is electrically connected with the other ends of the plurality of notch modules respectively and used for selectively conducting a target notch module in the plurality of notch modules, and the conducted target notch module is used for suppressing a resonance component generated by intermodulation distortion under a target working frequency band.
In one embodiment, each of the notching modules includes:
the trap inductor and the trap capacitor are connected in series, one of the trap inductor and the trap capacitor is grounded, the other of the trap inductor and the trap capacitor is electrically connected with the other end of the first conducting module, and the trap inductor and the trap capacitor jointly act for restraining a resonance component generated by intermodulation distortion.
In one embodiment, at least one of the values of the notch inductance and the notch capacitance is different for different notch modules.
In one embodiment, the first conducting module includes:
and the multi-path conduction switches are respectively connected with the trap modules in a one-to-one correspondence manner, one end of each path of conduction switch is electrically connected with the transmission path, the other end of each path of conduction switch is electrically connected with the other end of the corresponding trap module, and the conduction switches are used for conducting the connection path between the corresponding trap modules and the transmission path.
In one embodiment, the method further comprises the following steps:
the impedance matching module is grounded at one end and is used for conducting when resonance components generated by intermodulation distortion do not need to be suppressed so as to carry out impedance matching on radio-frequency signals in a transmission path;
and one end of the second conduction module is arranged in the transmission path, the other end of the second conduction module is electrically connected with the other end of the impedance matching module respectively and used for selectively conducting the impedance matching module, and the conducted impedance matching module is used for carrying out impedance matching on the radio-frequency signal in the transmission path.
In one embodiment, the impedance matching module comprises:
and one end of the impedance matching inductor is used as one end of the impedance matching module and is grounded, and the other end of the impedance matching inductor is used as the other end of the impedance matching module and is electrically connected with the other end of the second conduction module, and is used for performing impedance matching on the radio-frequency signal in the transmission path when the impedance matching module is conducted.
In one embodiment, the inductance value of the impedance matching inductor is 47-100 Nh.
A radio frequency system comprising a circuit for suppressing intermodulation distortion as described above.
In one embodiment, the method further comprises the following steps:
a radio frequency transceiver for modulating and demodulating the radio frequency signal;
one end of the power amplifier is electrically connected with one end of the radio frequency transceiver and is used for respectively carrying out power amplification on each frequency band in the radio frequency signals;
one end of the duplexer is electrically connected with the other end of the power amplifier and is used for transmitting the radio-frequency signal;
the antenna is electrically connected with the other end of the duplexer and is used as a carrier for receiving the radio-frequency signals and sending the radio-frequency signals;
wherein the circuitry to suppress intermodulation distortion is disposed in a transmission path between the radio frequency transceiver and the antenna.
A control method for suppressing intermodulation distortion, comprising:
acquiring a target working frequency band corresponding to a radio frequency signal in a transmission channel;
if the target working frequency band needs to suppress the resonance component generated by intermodulation distortion, determining a target notch module matched with the target working frequency band in the plurality of notch modules according to the matching relation between the pre-configured working frequency band and the notch modules;
and controlling the first conduction module to conduct the target notch module so that the target notch module suppresses the resonance component generated by the intermodulation distortion under the target working frequency band.
In one embodiment, the method further comprises:
determining the corresponding inhibition performance of different working frequency bands when the plurality of trap modules are respectively conducted;
and determining the notch modules matched with different working frequency bands according to the comparison result of the inhibition performance, and binding and storing the working frequency bands and the matched notch modules to obtain the matching relationship between the pre-configured working frequency bands and the notch modules.
In one embodiment, the method further comprises:
and if the target working frequency band does not need to suppress the resonance component generated by intermodulation distortion, controlling a second conduction module to conduct an impedance matching module so as to enable the impedance matching module to perform impedance matching on the radio-frequency signal in the transmission channel.
A control apparatus for suppressing intermodulation distortion, comprising:
the working frequency band acquisition module is used for acquiring a target working frequency band corresponding to the radio-frequency signal in the transmission channel;
a notch module determining module, configured to determine, according to a matching relationship between a pre-configured operating frequency band and a notch module, a target notch module that is matched with the target operating frequency band among the plurality of notch modules if the target operating frequency band needs to suppress a resonance component generated by intermodulation distortion;
and the control module is used for controlling the first conduction module to conduct the target notch module so as to enable the target notch module to restrain resonance components generated by intermodulation distortion under a target working frequency band.
An electronic device comprising a memory storing a computer program and a processor implementing the steps of the method described above when the processor executes the computer program.
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 above-mentioned method.
According to the circuit, the control method, the device, the system and the electronic equipment for inhibiting the interconnection distortion, the circuit for inhibiting the interconnection distortion comprises the plurality of trap modules, and different trap modules can be selected to be conducted according to different frequency bands of radio frequency signals, so that different resonance components generated by the intermodulation distortion under different working frequency bands are inhibited, and the inhibition effect of the intermodulation distortion is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of a circuit for suppressing intermodulation distortion according to an embodiment;
fig. 2 is a schematic diagram of another circuit for suppressing intermodulation distortion according to an embodiment;
fig. 3 is a schematic diagram of another circuit for suppressing intermodulation distortion according to an embodiment;
FIG. 4 is a schematic diagram of an embodiment of a radio frequency system;
fig. 5 is a flowchart illustrating a control method for suppressing intermodulation distortion according to an embodiment;
fig. 6 is a flowchart illustrating another control method for suppressing intermodulation distortion according to an embodiment;
fig. 7 is a flowchart illustrating another control method for suppressing intermodulation distortion according to an embodiment;
fig. 8 is a control apparatus for suppressing intermodulation distortion according to an embodiment.
Description of reference numerals: turning on a switch: 121, a carrier; the second conduction module: 140 of a solvent; the first conduction module: 120 of a solvent; a power amplifier: 30, of a nitrogen-containing gas; a radio frequency transceiver: 20; a duplexer: 40; an antenna: 50; trapped wave inductance: 111; trap capacitance: 112, a first electrode; a trap module: 110; impedance matching inductance: 131; an impedance matching module: 130, 130; circuit to suppress intermodulation distortion: 10; a controller: 150.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are set forth in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof. Also, as used in this specification, the term "and/or" includes any and all combinations of the associated listed items.
As mentioned in the background art, the solutions for suppressing intermodulation distortion in the prior art have a problem of poor effect of suppressing intermodulation distortion, and the applicant has found that the problem occurs because the current consumer products are all moving toward miniaturization and thinning, the layout space of the products is more compact, the size of the radio frequency devices is smaller, the isolation between the frequency bands is worse, the problem of intermodulation distortion (IMD) is more prominent, and the resonance components generated by the intermodulation distortion of the radio frequency signals of different frequency bands are different. Therefore, one notch module cannot meet the requirement of suppressing different resonance components generated by radio frequency signals of multiple frequency bands.
For the above reasons, the invention provides a circuit, a control method, a device, a system and an electronic device for suppressing intermodulation distortion.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a circuit for suppressing intermodulation distortion according to an embodiment. In one embodiment, as shown in fig. 1, a circuit for suppressing intermodulation distortion is provided, which includes a plurality of notch modules 110 and a first pass module 120. Wherein:
one end of each notch module 110 is grounded for suppressing different resonance components generated by intermodulation distortion in different operating frequency bands. One end of the first conducting module 120 is disposed in a transmission path of a radio frequency signal, the other end of the first conducting module 120 is electrically connected to the other ends of the plurality of notch modules 110, respectively, and is configured to selectively conduct a target notch module 110 of the plurality of notch modules 110, where the conducted target notch module 110 is configured to suppress a resonance component generated by intermodulation distortion in a target operating frequency band.
Intermodulation distortion refers to new frequency components generated by two or more signals of different frequencies after passing through an amplifier or a loudspeaker, and the distortion is usually generated by active devices (such as transistors and tubes) in a circuit. Specifically, there are a plurality of notch modules 110 in the present embodiment, and each notch module 110 is used to suppress a resonance component generated due to intermodulation distortion in a specific operating frequency band. When it is necessary to suppress a resonance component generated by intermodulation distortion in the target operating frequency band, since the first conducting module 120 may selectively conduct the target notch module 110 in the plurality of notch modules 110, the first conducting module 120 may conduct the target notch module 110 for suppressing the resonance component generated in the target operating frequency band, so that the conducted target notch module 110 suppresses the resonance component generated by intermodulation distortion in the target operating frequency band.
It should be noted that the target operating frequency band of this embodiment does not represent a specific operating frequency band, the target notching module 110 does not represent the specific notching module 110, and the notching module 110 corresponding to the specific operating frequency band needs to be determined according to an actual situation, which is not specifically limited in this embodiment. The resonance component suppressed by the present embodiment may be a resonance component generated by the own transmission path, that is, a resonance component generated by the transmission path connected to the first pass module 120, or may be a resonance component generated by another transmission path.
In this embodiment, there are a plurality of notch modules 110, and different notch modules 110 may be selected to be turned on according to different frequency bands of the radio frequency signal, so as to suppress different resonance components generated by intermodulation distortion under different operating frequency bands, thereby avoiding a problem that one notch module 110 cannot adapt to different resonance components generated by intermodulation distortion under multiple operating frequency bands.
Referring to fig. 2, fig. 2 is a schematic diagram of another circuit for suppressing intermodulation distortion according to an embodiment. In one embodiment, as shown in FIG. 2, each notch module 110 of the present embodiment includes a notch inductance 111 and a notch capacitance 112 in series. Wherein:
one of the notch inductor 111 and the notch capacitor 112 is grounded, the other of the notch inductor 111 and the notch capacitor 112 is electrically connected to the other end of the first conducting module 120, and the notch inductor 111 and the notch capacitor 112 jointly act to suppress a resonant component generated by intermodulation distortion.
Specifically, the notch inductor 111 and the notch capacitor 112 are connected in series, one of the notch inductor 111 and the notch capacitor 112 is grounded, and the other of the notch inductor 111 and the notch capacitor 112 is electrically connected to the other end of the first conducting module 120. When the notch inductor 111 is grounded, one end of the notch inductor 111 far away from the notch capacitor 112 is grounded, and one end of the notch capacitor 112 far away from the notch inductor 111 is electrically connected with the other end of the first conducting module 120; when the notch capacitor 112 is grounded, one end of the notch capacitor 112 away from the notch inductor 111 is grounded, and one end of the notch inductor 111 away from the notch capacitor 112 is electrically connected to the other end of the first conducting module 120.
It should be noted that at least one parameter value of the notch inductance 111 and the notch capacitance 112 is different for different notch modules 110. Specifically, the inductance of the notch inductor 111 may be different, the capacitance of the notch capacitor 112 may be different, or both the notch inductor 111 and the notch capacitor 112 may be different between different notch modules 110. It is understood that the parameter values of the notch inductor 111 and the notch capacitor 112 are determined according to the sizes of the resonance components generated in different frequency bands, and this embodiment is not particularly limited.
In this embodiment, different resonant components generated in different operating frequency bands can be adapted only by changing at least one parameter value of the notch inductor 111 and the notch capacitor 112 between different notch modules 110, and the scheme is simple to implement and has low cost.
In one embodiment, the first turn-on module 120 includes a multiple turn-on switch 121. Wherein:
the multiple conduction switches 121 are respectively connected to the plurality of notch modules 110 in a one-to-one correspondence manner, one end of each conduction switch 121 is electrically connected to the transmission path, the other end of each conduction switch 121 is electrically connected to the other end of the corresponding notch module 110, and the conduction switch 121 is configured to conduct the connection path between the corresponding notch module 110 and the transmission path.
In this embodiment, the first conducting module 120 includes a multi-way conducting switch 121. The multiple conducting switches 121 are respectively connected to the plurality of notch modules 110 in a one-to-one correspondence manner, that is, each notch module 110 corresponds to one conducting switch 121. When the target notch module 110 needs to be turned on, the target turn-on switch 121 corresponding to the target notch module 110 is turned on, and the target notch module 110 is electrically connected to the transmission path, so that the connection path between the target notch module 110 and the transmission path is turned on, the target notch module 110 operates, and the resonance component generated by the intermodulation distortion of the target operating frequency band is suppressed.
It is understood that in another embodiment, a one-way switch 121 can be provided, and the one-way switch 121 is a single-pole multi-throw switch, so that the conducting trap module 110 can be selected through the one-way switch 121.
In this embodiment, by setting the conducting switches 121 corresponding to each notch module 110 one to one, only the conducting switch 121 corresponding to the notch module 110 that needs to operate needs to be controlled to be closed, so that the notch module 110 that needs to operate is connected to the transmission path, and because the conducting switch 121 of each notch module 110 is controlled independently, the problem that the conducting notch module 110 is wrong due to the fact that one conducting switch 121 controls the conducting of the target notch module 110 in the plurality of notch modules 110 is avoided, and the accuracy of conducting control of the notch module 110 is improved.
Referring to fig. 3, fig. 3 is a schematic diagram of another circuit for suppressing intermodulation distortion according to an embodiment. In one embodiment, as shown in fig. 3, the circuit for suppressing intermodulation distortion further includes an impedance matching module 130 and a second turn-on module 140. Wherein:
one end of the impedance matching module 130 is grounded and is configured to be turned on when it is not necessary to suppress a resonance component generated by intermodulation distortion, so as to perform impedance matching on the radio frequency signal in the transmission path. One end of the second conduction module 140 is disposed in the transmission path, the other end of the second conduction module 140 is electrically connected to the other end of the impedance matching module 130, respectively, and is configured to selectively conduct the impedance matching module 130, and the conducted impedance matching module 130 is configured to perform impedance matching on the radio frequency signal in the transmission path.
Specifically, when intermodulation distortion does not need to be suppressed, the second conducting module 140 conducts the impedance matching module 130, so that the conducted impedance module performs impedance matching on the radio frequency signal in the transmission path. At this time, the first conduction module 120 does not conduct any one of the notch modules 110.
It will be appreciated that in some usage scenarios, not all rf signals in any operating band need to suppress the resonant components generated by intermodulation distortion. In the embodiment, the trap module 110 is turned on when the resonant component generated by the intermodulation distortion does not need to be suppressed, so that the radio frequency signal in the transmission path is impedance-matched, and any one trap module 110 is turned off, thereby preventing the trap module 110 from being turned on to influence the impedance matching of the radio frequency signal, minimizing the damage to the impedance characteristic of the transmission path of the radio frequency signal, and improving the impedance matching effect on the premise of not suffering from the intermodulation distortion.
It should be noted that there may be a plurality of impedance matching modules 130, and the second conducting module 140 selectively conducts at least one of the plurality of impedance matching modules 130. When the suppression of the resonant component generated by the intermodulation distortion is not required, the target impedance matching in the plurality of impedance matching modules 130 is selected to be turned on, thereby further improving the effect of impedance matching.
In one embodiment, the impedance matching module 130 includes an impedance matching inductor 131. Wherein:
one end of the impedance matching inductor 131 is grounded as one end of the impedance matching module 130, and the other end of the impedance matching inductor 131 is electrically connected to the other end of the second conduction module 140 as the other end of the impedance matching module 130, and is configured to perform impedance matching on the radio frequency signal in the transmission path when the impedance matching module is conducted.
Specifically, when it is not necessary to suppress a resonance component generated by intermodulation distortion, the impedance matching inductor 131 is turned on, so that the radio frequency signal in the transmission path is impedance-matched when turned on.
The inductance value of the impedance matching inductor 131 is 47 to 100Nh (nanohenries). By arranging the impedance matching inductor 131, impedance matching in most scenes can be met, and complexity of a circuit is reduced. Optionally, the first pass-through module 120 and the second pass-through module 140 are integrated together.
In one embodiment, the circuit for suppressing intermodulation distortion further comprises a controller 150. The controller 150 has control terminals electrically connected to the first conducting module 140 and the second conducting module 120, respectively, and is configured to control the first conducting module 120 to conduct a target notch module 110 of the plurality of notch modules 110 when it is required to suppress a resonant component generated by intermodulation distortion, and to control the second conducting module 120 to conduct the impedance matching module 130 when it is not required to suppress the resonant component generated by intermodulation distortion.
Alternatively, the controller 150 may be integrated on the baseband chip, or may be a separate control device, which is not limited in this embodiment. Preferably, the controller 150 of this embodiment is the controller 150 on the baseband chip, so as to perform information interaction with the radio frequency transceiver to obtain the operating frequency band of the radio frequency signal.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a radio frequency system according to an embodiment. In one embodiment, as shown in fig. 4, a radio frequency system includes a circuit 10 for suppressing intermodulation distortion.
The circuit 10 for suppressing intermodulation distortion in the present embodiment may refer to the description of any one of the above embodiments, and the present embodiment is not particularly limited.
In one embodiment, the radio frequency system further comprises a radio frequency transceiver 20, a power amplifier 30, a duplexer 40 and an antenna 50. Wherein:
a radio frequency transceiver 20 for modulating and demodulating the radio frequency signal; one end of the power amplifier 30 is electrically connected with one end of the radio frequency transceiver, and is used for respectively performing power amplification on each frequency band in the radio frequency signal; a duplexer 40, one end of the duplexer 40 being electrically connected to the other end of the power amplifier 30, for transmitting the radio frequency signal; and the antenna 50 is electrically connected with the other end of the duplexer 40 and is used as a carrier for receiving the radio-frequency signals and sending the radio-frequency signals. A circuit 10 for suppressing intermodulation distortion is disposed in a transmission path between the radio frequency transceiver 20 and the antenna 50.
Alternatively, the radio frequency transceiver may be a CA (Carrier Aggregation) and MIMO (multiple input multiple output) transceiver.
It should be understood that the radio frequency system is not limited to the above description, as long as the transceiving of signals can be achieved, and different resonance components generated by intermodulation distortion under different operating frequency bands can be suppressed, and the present embodiment is not particularly limited.
Referring to fig. 5, fig. 5 is a flowchart illustrating a control method for suppressing intermodulation distortion according to an embodiment. In one embodiment, as shown in fig. 5, a control method for suppressing intermodulation distortion comprises:
step S510, a target working frequency band corresponding to the radio frequency signal in the transmission path is obtained.
The target working frequency band refers to a working frequency band corresponding to a current radio frequency signal in a transmission channel.
Step S520, if the target operating frequency band needs to suppress a resonance component generated by intermodulation distortion, determining a target notch module matched with the target operating frequency band among the plurality of notch modules according to a matching relationship between a pre-configured operating frequency band and a notch module.
The matching relation refers to the corresponding relation between the working frequency band and the notch module. Specifically, the matching relationship may be obtained by a preliminary experiment. Since the matching relationship includes the corresponding relationship between the operating frequency band and the notch module, the target notch module matched with the target operating frequency band can be determined according to the target operating frequency band. In this step, if the target operating band needs to suppress the resonance component generated by the intermodulation distortion control, the target notch module matched with the target operating band is determined according to the matching relationship.
In one possible implementation, whether the target operating band needs to be suppressed may be determined by a preconfigured set of operating band suppression. The working frequency band suppression set refers to a set of predetermined working frequency bands needing intermodulation distortion suppression. And if the target working frequency band is one of the working frequency bands in the working frequency band suppression set, determining that the working frequency band needs to suppress the resonance component generated by the intermodulation distortion.
Step S530, controlling the first conducting module to conduct the target notch module, so that the target notch module suppresses a resonance component generated by intermodulation distortion in the target operating frequency band.
In this step, the first conducting module is controlled to conduct the target notch module, so that the conducted target notch module suppresses the resonance component generated by the intermodulation distortion in the target working frequency band.
In this embodiment, the target notch module matched with the target operating frequency band may be selected to be turned on according to the target operating frequency band, so that the turned-on target notch module may suppress a resonance component generated by intermodulation distortion in the target operating frequency band. Different trap modules can be conducted in different working frequency bands, so that the suppression effect of intermodulation distortion is improved.
Referring to fig. 6, fig. 6 is a flowchart illustrating another control method for suppressing intermodulation distortion according to an embodiment. The method of the embodiment is suitable for the steps before the target notch module matched with the target working frequency band is determined according to the matching relation. In one embodiment, as shown in fig. 6, a control method for suppressing intermodulation distortion comprises:
step S610, determining the corresponding suppression performance of different working frequency bands when the plurality of notch modules are respectively conducted.
The suppression performance refers to a suppression effect of the notch module on a resonance component generated by intermodulation distortion of a radio frequency channel. The higher the suppression performance, the better the suppression effect. In this step, the corresponding suppression performance of different operating frequency bands when the plurality of notch modules are respectively turned on is determined.
And S620, determining notch modules matched with different working frequency bands according to the comparison result of the inhibition performance, and binding and storing the working frequency bands and the matched notch modules to obtain the matching relationship between the preset working frequency bands and the notch modules.
The comparison result refers to a comparison result of suppression performance pairs of different trap modules under one working frequency band. And determining the notch modules matched with different working frequency bands according to the comparison result, and binding and storing the working frequency bands and the matched notch modules to obtain a preset matching relation.
Optionally, in the suppression performance of different notch modules corresponding to one working frequency band, the notch module with the highest suppression performance is used as the notch module matched with the working frequency band, so that the notch modules matched with different working frequency bands can be obtained.
Step S630, acquiring a target working frequency band corresponding to the radio frequency signal in the transmission channel;
the step can refer to the description of the above embodiment, and the embodiment is not limited.
Step 640, if the target working frequency band needs to suppress a resonance component generated by intermodulation distortion, determining a target notch module matched with the target working frequency band in a plurality of notch modules according to a matching relationship between the pre-configured working frequency band and the notch modules;
the step can refer to the description of the above embodiment, and the embodiment is not limited.
Step S650, controlling the first conducting module to conduct the target notch module, so that the target notch module suppresses a resonance component generated by intermodulation distortion in a target operating frequency band.
The step can refer to the description of the above embodiment, and the embodiment is not limited.
In this embodiment, the corresponding relationship between the operating frequency band and the notch module in the matching relationship may be determined according to a predetermined experiment, and with the method of this embodiment, the corresponding relationship between the operating frequency band and the notch module in the matching relationship may be changed according to different scenarios without changing the structure of the circuit for suppressing intermodulation distortion, so that a good performance of suppressing intermodulation distortion may be maintained without changing the circuit for suppressing intermodulation distortion.
Referring to fig. 7, fig. 7 is a flowchart illustrating another control method for suppressing intermodulation distortion according to an embodiment. The embodiment is suitable for the scene without suppressing the resonance component generated by intermodulation distortion. In one embodiment, as shown in figure 7,
step S710, acquiring a target working frequency band corresponding to the radio frequency signal in the transmission channel;
the step can refer to the description of the above embodiment, and the embodiment is not limited.
Step S720, if the target working frequency band needs to suppress the resonance component generated by intermodulation distortion, determining a target notch module matched with the target working frequency band in a plurality of notch modules according to the matching relationship between the pre-configured working frequency band and the notch modules;
the step can refer to the description of the above embodiment, and the embodiment is not limited.
Step S730, controlling the first conducting module to conduct the target notch module, so that the target notch module suppresses the resonance component generated by the intermodulation distortion in the target operating frequency band.
Step S740, if the target operating frequency band does not need to suppress a resonance component generated by intermodulation distortion, controlling a second conducting module to conduct an impedance matching module, so that the impedance matching module performs impedance matching on the radio frequency signal in the transmission path.
In this step, if the target operating frequency band does not need to suppress the resonant component of the intermodulation distortion, the second conducting module may be controlled to conduct the impedance matching module, so that the impedance matching module performs impedance matching on the radio frequency signal in the transmission path without suppressing the intermodulation distortion.
In one possible implementation, whether the target operating band needs to be impedance matched may be determined by a predetermined matching set of operating bands. The working frequency band matching set refers to a set of predetermined working frequency bands needing impedance matching. And if the target working frequency band is one of the working frequency bands in the working frequency band matching set, determining that the working frequency band needs to be subjected to impedance matching.
In this embodiment, when the resonance component generated by intermodulation distortion does not need to be suppressed, the second conducting module is controlled to conduct the impedance matching module to perform impedance matching on the radio frequency signal in the transmission path, and any notch module is not conducted, so that the condition that the conduction of the notch module affects the impedance matching of the radio frequency signal is avoided, the impedance characteristic of the transmission path of the radio frequency signal is minimally damaged, and the impedance matching effect is improved on the premise of not suffering from intermodulation distortion. In addition, the working frequency band matching set can be changed, so that the working frequency band in the working frequency band matching set can be changed according to different scenes, and good impedance matching performance can be kept without changing a circuit for suppressing intermodulation distortion.
It should be understood that although the various steps in the flowcharts of fig. 5-7 are shown in order as indicated by the arrows, the steps are not necessarily performed in order as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least some of the steps in fig. 5-7 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, which are not necessarily performed in sequence, but may be performed in turn or alternately with other steps or at least some of the other steps.
Referring to fig. 8, fig. 8 is a control apparatus for suppressing intermodulation distortion according to an embodiment. In one embodiment, as shown in fig. 8, the control apparatus for suppressing intermodulation distortion comprises an operating band obtaining module 810, a notching module determining module 820, and a control module 830. Wherein:
a working frequency band obtaining module 810, configured to obtain a target working frequency band corresponding to a radio frequency signal in a transmission path;
a notch module determining module 820, configured to determine, according to a matching relationship between a pre-configured operating frequency band and a notch module, a target notch module that is matched with the target operating frequency band among the plurality of notch modules if the target operating frequency band needs to suppress a resonance component generated by intermodulation distortion;
a control module 830, configured to control the first conducting module to conduct the target notch module, so that the target notch module suppresses a resonance component generated by intermodulation distortion in a target operating frequency band.
In one embodiment, the control device for suppressing intermodulation distortion further comprises:
the suppression performance determining module is used for determining the suppression performance corresponding to different working frequency bands when the plurality of trap modules are respectively conducted;
and the storage module is used for determining the notch modules matched with different working frequency bands according to the comparison result of the inhibition performance, binding and storing the working frequency bands and the matched notch modules, and obtaining the matching relationship between the preset working frequency bands and the notch modules.
In an embodiment, the control module 830 is further configured to control the second conducting module to conduct the impedance matching module if the target operating frequency band does not need to suppress a resonance component generated by intermodulation distortion, so that the impedance matching module performs impedance matching on the radio frequency signal in the transmission path.
For specific limitations of the control apparatus for suppressing intermodulation distortion, reference may be made to the above limitations of the control method for suppressing intermodulation distortion, and details are not repeated here. The modules in the control device for suppressing intermodulation distortion can be wholly or partially implemented by software, hardware and a combination thereof. The modules can be embedded in a hardware form or independent of a processor in the electronic device, or can be stored in a memory in the electronic device in a software form, so that the processor can call and execute operations corresponding to the modules. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
In one embodiment, an electronic device is provided, which includes a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method embodiments when executing the computer program.
In an embodiment, a computer-readable storage medium is provided, on which a computer program is stored, which computer program, 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, storage, database or other medium used in the embodiments provided herein can 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 can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), among others.
In the description herein, references to the description of "some embodiments," "other embodiments," "desired embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
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 (15)
1. A circuit for suppressing intermodulation distortion, comprising:
one end of each trap module is grounded and is used for inhibiting different resonance components generated by intermodulation distortion under different working frequency bands;
the first conducting module is arranged in a transmission channel of a radio frequency signal, and the other end of the first conducting module is electrically connected with the other ends of the plurality of notch modules respectively and used for selectively conducting a target notch module in the plurality of notch modules, and the conducted target notch module is used for suppressing a resonance component generated by intermodulation distortion under a target working frequency band.
2. The circuit of claim 1, wherein each of the notching modules includes:
the trap inductor and the trap capacitor are connected in series, one of the trap inductor and the trap capacitor is grounded, the other of the trap inductor and the trap capacitor is electrically connected with the other end of the first conducting module, and the trap inductor and the trap capacitor jointly act for restraining a resonance component generated by intermodulation distortion.
3. The circuit of claim 2, wherein at least one of the notch inductance and notch capacitance values for different notch modules are different.
4. The circuit of claim 1, wherein the first pass module comprises:
and the multi-path conduction switches are respectively connected with the trap modules in a one-to-one correspondence manner, one end of each path of conduction switch is electrically connected with the transmission path, the other end of each path of conduction switch is electrically connected with the other end of the corresponding trap module, and the conduction switches are used for conducting the connection path between the corresponding trap modules and the transmission path.
5. The circuit of any of claims 1-4, further comprising:
the impedance matching module is grounded at one end and is used for conducting when resonance components generated by intermodulation distortion do not need to be suppressed so as to carry out impedance matching on radio-frequency signals in a transmission path;
and one end of the second conduction module is arranged in the transmission path, the other end of the second conduction module is electrically connected with the other end of the impedance matching module respectively and used for selectively conducting the impedance matching module, and the conducted impedance matching module is used for carrying out impedance matching on the radio-frequency signal in the transmission path.
6. The circuit of claim 5, wherein the impedance matching module comprises:
and one end of the impedance matching inductor is used as one end of the impedance matching module and is grounded, and the other end of the impedance matching inductor is used as the other end of the impedance matching module and is electrically connected with the other end of the second conduction module, and is used for performing impedance matching on the radio-frequency signal in the transmission path when the impedance matching module is conducted.
7. The circuit of claim 6, wherein the impedance matching inductor has an inductance value of 47-100 Nh.
8. A radio frequency system comprising a circuit for suppressing intermodulation distortion as claimed in any of claims 1 to 7.
9. The radio frequency system of claim 8, further comprising:
a radio frequency transceiver for modulating and demodulating the radio frequency signal;
one end of the power amplifier is electrically connected with one end of the radio frequency transceiver and is used for respectively carrying out power amplification on each frequency band in the radio frequency signals;
one end of the duplexer is electrically connected with the other end of the power amplifier and is used for transmitting the radio-frequency signal;
the antenna is electrically connected with the other end of the duplexer and is used as a carrier for receiving the radio-frequency signals and sending the radio-frequency signals;
wherein the circuitry to suppress intermodulation distortion is disposed in a transmission path between the radio frequency transceiver and the antenna.
10. A control method for suppressing intermodulation distortion, comprising:
acquiring a target working frequency band corresponding to a radio frequency signal in a transmission channel;
if the target working frequency band needs to suppress the resonance component generated by intermodulation distortion, determining a target notch module matched with the target working frequency band in the plurality of notch modules according to the matching relation between the pre-configured working frequency band and the notch modules;
and controlling the first conduction module to conduct the target notch module so that the target notch module suppresses the resonance component generated by the intermodulation distortion under the target working frequency band.
11. The method of claim 10, wherein the method further comprises:
determining the corresponding inhibition performance of different working frequency bands when the plurality of trap modules are respectively conducted;
and determining the notch modules matched with different working frequency bands according to the comparison result of the inhibition performance, and binding and storing the working frequency bands and the matched notch modules to obtain the matching relationship between the pre-configured working frequency bands and the notch modules.
12. The method of claim 10, wherein the method further comprises:
and if the target working frequency band does not need to suppress the resonance component generated by intermodulation distortion, controlling a second conduction module to conduct an impedance matching module so as to enable the impedance matching module to perform impedance matching on the radio-frequency signal in the transmission channel.
13. A control apparatus for suppressing intermodulation distortion, comprising:
the working frequency band acquisition module is used for acquiring a target working frequency band corresponding to the radio-frequency signal in the transmission channel;
a notch module determining module, configured to determine, according to a matching relationship between a pre-configured operating frequency band and a notch module, a target notch module that is matched with the target operating frequency band among the plurality of notch modules if the target operating frequency band needs to suppress a resonance component generated by intermodulation distortion;
and the control module is used for controlling the first conduction module to conduct the target notch module so as to enable the target notch module to restrain resonance components generated by intermodulation distortion under a target working frequency band.
14. An electronic device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor realizes the steps of the method of any of claims 10 to 12 when executing the computer program.
15. 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 of any one of claims 10 to 12.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117895912A (en) * | 2024-03-18 | 2024-04-16 | 中兴通讯股份有限公司 | Adjustable filter and electronic equipment |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030220089A1 (en) * | 2002-05-23 | 2003-11-27 | Chang Tsung Yuan | Method and circuit to reduce intermodulation distortion |
| CN101651485A (en) * | 2008-08-15 | 2010-02-17 | 百一电子股份有限公司 | Method for reducing intermodulation interference and signal receiver used by same |
| CN203166879U (en) * | 2012-12-07 | 2013-08-28 | 青岛海信移动通信技术股份有限公司 | Spurious suppression circuit of radio frequency transmitter and mobile terminal |
| CN106972873A (en) * | 2017-03-28 | 2017-07-21 | 珠海市魅族科技有限公司 | Mobile terminal up-link carrier polymerize and WIFI co-channel interference suppression methods and system |
| CN107210775A (en) * | 2015-01-21 | 2017-09-26 | 株式会社村田制作所 | High frequency power amplification module and communicator |
| CN107769869A (en) * | 2016-08-18 | 2018-03-06 | 京信通信系统（中国）有限公司 | Multi-signal passive intermodulation test system |
| CN108075803A (en) * | 2017-11-17 | 2018-05-25 | 深圳市金立通信设备有限公司 | Inhibit the radio circuit and terminal of harmonic wave |
| CN207530820U (en) * | 2017-12-06 | 2018-06-22 | 维沃移动通信有限公司 | A kind of RF front-end module and mobile terminal |
| CN108540143A (en) * | 2013-12-12 | 2018-09-14 | 华为技术有限公司 | Method, apparatus, RF processing unit and the broad-band antenna that broadband signal receives |
-
2020
- 2020-09-29 CN CN202011045621.3A patent/CN112290971A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20030220089A1 (en) * | 2002-05-23 | 2003-11-27 | Chang Tsung Yuan | Method and circuit to reduce intermodulation distortion |
| CN101651485A (en) * | 2008-08-15 | 2010-02-17 | 百一电子股份有限公司 | Method for reducing intermodulation interference and signal receiver used by same |
| CN203166879U (en) * | 2012-12-07 | 2013-08-28 | 青岛海信移动通信技术股份有限公司 | Spurious suppression circuit of radio frequency transmitter and mobile terminal |
| CN108540143A (en) * | 2013-12-12 | 2018-09-14 | 华为技术有限公司 | Method, apparatus, RF processing unit and the broad-band antenna that broadband signal receives |
| CN107210775A (en) * | 2015-01-21 | 2017-09-26 | 株式会社村田制作所 | High frequency power amplification module and communicator |
| CN107769869A (en) * | 2016-08-18 | 2018-03-06 | 京信通信系统（中国）有限公司 | Multi-signal passive intermodulation test system |
| CN106972873A (en) * | 2017-03-28 | 2017-07-21 | 珠海市魅族科技有限公司 | Mobile terminal up-link carrier polymerize and WIFI co-channel interference suppression methods and system |
| CN108075803A (en) * | 2017-11-17 | 2018-05-25 | 深圳市金立通信设备有限公司 | Inhibit the radio circuit and terminal of harmonic wave |
| CN207530820U (en) * | 2017-12-06 | 2018-06-22 | 维沃移动通信有限公司 | A kind of RF front-end module and mobile terminal |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117895912A (en) * | 2024-03-18 | 2024-04-16 | 中兴通讯股份有限公司 | Adjustable filter and electronic equipment |
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