Radio frequency calibration circuit, electronic device, and radio frequency calibration method

Abstract

The embodiment of the application discloses a radio frequency calibration circuit, an electronic device and a radio frequency calibration method. The circuit comprises a radio frequency transceiver, a coupler, a radio frequency testing device and a load impedance. The radio frequency transceiver is used for transmitting a plurality of transmission signals with different transmission powers. The radio frequency testing device is used for performing power measurement on the plurality of transmission signals to determine power measurement values corresponding to the respective transmission signals, selecting a target transmission signal with a target power from the plurality of transmission signals, and determining a transmission power corresponding to the target transmission signal. The coupler is used for determining a power coupling value corresponding to the target transmission signal. The radio frequency transceiver is further used for determining a power correspondence relationship according to the transmission power corresponding to the target transmission signal, the target power and the corresponding power coupling value, and calibrating the transmission power of the transmission signal according to the power correspondence relationship. The embodiment of the application can effectively reduce the use of the radio frequency testing device and reduce the calibration cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a radio frequency calibration circuit, an electronic device and a radio frequency calibration method. BACKGROUND

[0002] With the continuous development of science and technology, mobile electronic devices are becoming more and more popular, and mobile electronic devices need to be calibrated during production. However, in the related art, a radio frequency test device is set on a production line to continuously measure the mobile electronic device until the mobile electronic device completes the calibration process, which results in that the calibration process is not flexible and the calibration cost is increased. SUMMARY

[0003] Embodiments of the present application disclose a radio frequency calibration circuit, an electronic device and a radio frequency calibration method, which can improve the flexibility of the calibration process and reduce the calibration cost.

[0004] In a first aspect, the present application discloses a radio frequency calibration circuit, which comprises a radio frequency transceiver, a coupler, a radio frequency test device and a load impedance; the radio frequency transceiver is connected with the coupler, and the coupler is connected with the radio frequency test device and the load impedance respectively;

[0005] The radio frequency transceiver is configured to send a plurality of transmission signals with different transmission powers to the coupler respectively.

[0006] The radio frequency test device is configured to, in a case where a first path between the coupler and the radio frequency test device is turned on, receive the plurality of transmission signals transmitted by the coupler, perform power measurement on the plurality of transmission signals to determine a power measurement value corresponding to each of the transmission signals, select a target transmission signal with a target power from the plurality of transmission signals, and determine a transmission power corresponding to the target transmission signal.

[0007] The coupler is configured to, in a case where a second path between the coupler and the load impedance is turned on and the first path is turned off, determine a power coupling value corresponding to the target transmission signal.

[0008] The radio frequency transceiver is further configured to determine a power correspondence relationship according to the transmission power corresponding to the target transmission signal, the target power and the corresponding power coupling value, and calibrate the transmission power of the transmission signal according to the power correspondence relationship.

[0009] As an optional implementation, in the first aspect of the present application, the radio frequency test device is further configured to select N target transmission signals from the plurality of transmission signals, the power measurement values of the N target transmission signals are N different target powers respectively, and N is an integer greater than 1; and determine the transmission power corresponding to each of the target transmission signals.

[0010] The radio frequency transceiver is further configured to determine a transmission power difference value according to a first transmission power of a first target transmission signal and a second transmission power of a second target transmission signal, determine a power measurement difference value according to a first target power of the first target transmission signal and a second target power of the second target transmission signal, and determine a power coupling difference value according to a first power coupling value of the first target transmission signal and a second power coupling value of the second target transmission signal, the first target transmission signal and the second target transmission signal being any two of the N target transmission signals.

[0011] The radio frequency transceiver is further configured to determine the power correspondence relationship according to the transmission power difference value, the power measurement difference value, and the power coupling difference value.

[0012] As an optional implementation, in the first aspect of the embodiment, the radio frequency transceiver is further configured to determine a multiplication relationship between the transmission power difference value and a unit transmission power, determine a power coupling increase amount corresponding to the unit transmission power according to the power coupling difference value and the multiplication relationship, determine a power measurement increase amount corresponding to the unit transmission power according to the power measurement difference value and the multiplication relationship, and obtain a standard power increase amount according to the power coupling increase amount and the power measurement increase amount, the standard power increase amount being a power measurement value increased by the power measurement increase amount when the power coupling increase amount is a unit power coupling value.

[0013] The radio frequency transceiver is further configured to calibrate the transmission power of the transmission signal according to the standard power increase amount.

[0014] As an optional implementation, in the first aspect of the embodiment, the coupler is further configured to measure the power of the transmission signals transmitted by the radio frequency transceiver to determine the power coupling value corresponding to each of the transmission signals when the second path between the load impedance is turned on and the first path is turned off.

[0015] The radio frequency transceiver is further configured to determine a coupling difference value between the power coupling value corresponding to each of the transmission signals and the power coupling value corresponding to a third target power, the third target power being any one of the target powers, and determine a power measurement value range corresponding to the third target power according to the coupling difference value corresponding to each of the transmission signals, the standard power increase amount, and the third target power.

[0016] The radio frequency transceiver is further configured to calibrate the transmission power of the transmission signal according to the power measurement value range corresponding to each of the target powers.

[0017] As an optional implementation, in the first aspect of the embodiment, the radio frequency transceiver is further configured to calculate a product of each of the coupling difference corresponding to the transmission signal and the standard power increase, and sum each of the products with the third target power, and determine a power measurement range corresponding to the third target power according to a plurality of results obtained after the summing.

[0018] As an optional implementation, in the first aspect of the embodiment, the radio frequency calibration circuit further comprises a switching device.

[0019] The switching device is configured to turn on a first path between the coupler and the radio frequency testing device, and turn off a second path between the coupler and the load impedance; and after the radio frequency testing device determines the transmission power corresponding to the target transmission signal, turn on the second path between the coupler and the load impedance, and turn off the first path between the coupler and the radio frequency testing device.

[0020] As an optional implementation, in the first aspect of the embodiment, the radio frequency calibration circuit further comprises a duplexer and a filter, the duplexer is connected with the radio frequency transceiver and the coupler respectively, and the filter is connected with the radio frequency transceiver and the coupler respectively.

[0021] The radio frequency transceiver is further configured to send transmission signals with different transmission powers to the duplexer if the radio frequency calibration circuit is in a time division duplex mode, and send transmission signals with different transmission powers to the filter if the radio frequency calibration circuit is in a frequency division duplex mode.

[0022] The duplexer is configured to isolate a transmission channel and a reception channel in the time division duplex mode, so as to isolate transmission signals and reception signals in the radio frequency signals when the radio frequency calibration circuit is in the time division duplex mode.

[0023] The filter is configured to isolate a transmission path and a reception path in the frequency division duplex mode, so as to isolate transmission signals and reception signals in the radio frequency signals when the radio frequency calibration circuit is in the frequency division duplex mode.

[0024] As an optional implementation, in the first aspect of the embodiment, the radio frequency calibration circuit further comprises a radio frequency power amplifier, the radio frequency power amplifier is connected with the radio frequency transceiver and the coupler respectively.

[0025] The radio frequency power amplifier is configured to amplify the power of each transmission signal sent by the radio frequency transceiver, so as to obtain the transmission signals with different transmission powers, and send the transmission signals with different transmission powers to the coupler.

[0026] The second aspect of the embodiments of the present application discloses an electronic device, the electronic device comprising a radio frequency circuit and a radio frequency test device, the radio frequency circuit and the radio frequency test device constituting any one of the radio frequency calibration circuits disclosed by the embodiments of the present application.

[0027] The third aspect of the embodiments of the present application discloses a radio frequency calibration method applied to a radio frequency calibration circuit, the radio frequency calibration circuit comprising a radio frequency transceiver, a coupler, a radio frequency test device and a load impedance, the method comprising:

[0028] In the case that the first path between the coupler is conducted, the power of a plurality of transmission signals transmitted by the radio frequency transceiver is measured by the radio frequency test device to determine the power measurement value corresponding to each of the transmission signals, a target transmission signal with a target power is selected from the plurality of transmission signals, and the transmission power corresponding to the target transmission signal is determined;

[0029] In the case that the second path between the load impedance is conducted and the first path is disconnected, the power coupling value corresponding to the target transmission signal is determined by the coupler;

[0030] The power corresponding relationship is determined by the radio frequency transceiver according to the transmission power corresponding to the target transmission signal, the target power and the corresponding power coupling value, and the transmission power of the transmission signal is calibrated according to the power corresponding relationship.

[0031] The embodiments of the present application disclose a computer readable storage medium which stores a computer program, wherein the computer program is executed by a processor to realize the radio frequency calibration method disclosed by the embodiments of the present application.

[0032] Compared with the related art, the embodiments of the present application have the following beneficial effects:

[0033] In the embodiment of the present application, the radio frequency calibration circuit comprises a radio frequency transceiver, a coupler, a radio frequency test device and a load impedance; the radio frequency transceiver is connected with the coupler, the coupler is connected with the radio frequency test device and the load impedance respectively; the radio frequency transceiver sends a plurality of transmission signals with different transmission powers to the coupler respectively; the radio frequency test device receives the plurality of transmission signals transmitted by the coupler when the first path between the radio frequency test device and the coupler is conducted, and performs power measurement on the plurality of transmission signals to determine the power measurement values corresponding to the respective transmission signals, selects a target transmission signal with a target power from the plurality of transmission signals, and determines the transmission power corresponding to the target transmission signal; the coupler determines the power coupling value corresponding to the target transmission signal when the second path between the coupler and the load impedance is conducted and the first path is disconnected; the radio frequency transceiver determines the power corresponding relationship according to the transmission power corresponding to the target transmission signal, the target power and the corresponding power coupling value, and calibrates the transmission power of the transmission signal according to the power corresponding relationship. Only the target power of the plurality of signals needs to be detected by the radio frequency test device, and the radio frequency calibration circuit can calibrate the transmission power of the transmission signal in the radio frequency signal according to the plurality of target powers and the plurality of power coupling values obtained by the coupler, without the participation of the radio frequency test device throughout the calibration process. The calibration can be accurately performed, the use of the radio frequency test device is effectively reduced, the calibration cost is reduced, and the calibration process is simple and flexible. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0035] Figure 1 An application scenario diagram of the radio frequency calibration circuit in an embodiment;

[0036] Figure 2 A module structure diagram of the radio frequency calibration circuit in an embodiment;

[0037] Figure 3 A structure diagram of the radio frequency calibration circuit in an embodiment;

[0038] Figure 4 A structure diagram of the radio frequency calibration circuit in another embodiment;

[0039] Figure 5 A structure diagram of the radio frequency calibration circuit in another embodiment;

[0040] Figure 6 A structure diagram of the radio frequency calibration circuit in another embodiment;

[0041] Figure 7 a flowchart of a radio frequency calibration method in an embodiment;

[0042] Figure 8 a structural diagram of an electronic device disclosed in an embodiment. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0044] It should be noted that the terms "comprising" and "having" and any variations thereof in the embodiments of the present application and the drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to the process, method, product or device.

[0045] The embodiments of the present application disclose a radio frequency calibration circuit, an electronic device and a radio frequency calibration method, which can effectively reduce the use of a radio frequency test device, reduce calibration cost, and simplify and flexibly calibrate. The following will be described in detail.

[0046] Please refer to Figure 1 , Figure 1 for an application scenario diagram of the radio frequency calibration circuit in an embodiment. As shown in Figure 1 , in the process of calibrating the electronic device 10, the electronic device 10 includes a radio frequency circuit, and the radio frequency circuit in the electronic device 10 can be connected with the radio frequency test instrument 20 through a wired connection mode to constitute a radio frequency calibration circuit, and then calibrate the electronic device 10 through the radio frequency calibration circuit. The electronic device 10 can be a mobile terminal such as a mobile phone, a tablet computer, a wearable device and the like capable of communication, and the present application does not limit this.

[0047] Please refer to Figure 2 , Figure 2 for a module structure diagram of the radio frequency calibration circuit in an embodiment. As shown in Figure 2 , the radio frequency calibration circuit 10 includes a radio frequency transceiver 210, a coupler 220, a radio frequency test device 230 and a load impedance 240; the radio frequency transceiver 210 is connected with the coupler 220, and the coupler 220 is connected with the radio frequency test device 230 and the load impedance 240 respectively.

[0048] a radio frequency transceiver 210, configured to send a plurality of transmission signals with different transmission powers to the coupler 220 respectively.

[0049] In the embodiment of the present application, in the process of radio frequency calibration of the electronic device 10, the radio frequency transceiver 210 generates a plurality of transmission signals with different transmission powers, and sends the generated plurality of transmission signals with different transmission powers to the coupler 220. The transmission power of the transmission signal generated and sent by the radio frequency transceiver 210 can be in an arithmetic sequence, for example, the radio frequency transceiver 210 generates 5 transmission signals, the minimum transmission power in each transmission signal is 1mw, and the transmission power is increased by 1mw, that is, the radio frequency transceiver 210 generates and sends 5 transmission signals with transmission powers of 1mw, 2mw, 3mw, 4mw and 5mw. The radio frequency transceiver 210 can also send each transmission signal with increasing transmission power one by one from the minimum transmission power.

[0050] a radio frequency test device 230, configured to receive the plurality of transmission signals transmitted by the coupler 220 when the first path between the coupler 220 and the radio frequency test device 230 is turned on, and perform power measurement on the plurality of transmission signals to determine the power measurement value corresponding to each transmission signal, select a target transmission signal with a target power from the plurality of transmission signals, and determine the transmission power corresponding to the target transmission signal.

[0051] In the embodiment of the present application, the first path is formed between the coupler 220 and the radio frequency test device 230, and the second path is formed between the coupler 220 and the load impedance 240. Only one of the first path and the second path can be turned on at the same time, and the other path needs to be disconnected. Therefore, when the first path between the coupler 220 and the radio frequency test device 230 is turned on, the second path between the coupler 220 and the load impedance 240 is disconnected, and at this time the coupler 220 transmits the plurality of transmission signals with different transmission powers sent by the radio frequency transceiver 210 to the radio frequency test device 230. The radio frequency test device 230 receives the plurality of transmission signals with different transmission powers transmitted by the coupler 220, and measures the plurality of transmission signals with different transmission powers to obtain the power measurement value corresponding to each transmission signal, that is, the power value of the transmission power measured by the radio frequency test device 230. A power measurement value can be selected as a target power by user selection or automatic selection of the radio frequency circuit, and the transmission signal corresponding to the target power is the target transmission signal. For example, the transmission signal corresponding to the power measurement value of 15dBm (decibel relative to one milliwatt) is selected as the target transmission signal.

[0052] The radio frequency transceiver 210 needs to be calibrated because of the error. That is, the transmitting power of a transmitting signal transmitted by the radio frequency transceiver 210 is not necessarily equal to the power measurement value of the transmitting signal measured by the radio frequency testing device 230, that is, there is a deviation. Therefore, after the radio frequency transceiver 210 selects a target transmitting signal with a power measurement value as a target power, the radio frequency testing device 230 can determine the transmitting power corresponding to the target transmitting signal, that is, the transmitting power of the selected transmitting signal transmitted by the radio frequency transceiver 210. The radio frequency testing device 230 records the transmitting power corresponding to each target transmitting signal, and transmits the recorded information to the radio frequency transceiver 210.

[0053] The coupler 220 is used to determine the power coupling value corresponding to the target transmitting signal when the second path between the coupler 220 and the load impedance 240 is turned on and the first path is turned off.

[0054] In the embodiment of the present application, when the second path between the coupler 220 and the load impedance 240 is turned on, the first path between the coupler 220 and the radio frequency testing device 230 is turned off, at this time, the radio frequency transceiver 210 can preferentially transmit the target transmitting signal to the coupler 220 according to the recorded target transmitting signal in the process of transmitting transmitting signals with different transmitting powers. The coupler 220 can receive the target transmitting signal and other transmitting signals with different transmitting powers transmitted by the radio frequency transceiver 210, and measure the power coupling value corresponding to the target transmitting signal. For example, the target transmitting signal with a power measurement value of 15 dBm may have a corresponding transmitting power of 16 dBm. Then, the radio frequency transceiver 210 can preferentially transmit the transmitting signal with a transmitting power of 16 dBm to the coupler 220. The power coupling value measured by the coupler 220 on the transmitting signal is the power coupling value corresponding to the target transmitting signal. At this time, the coupler 220 can feed back the information of the measured power coupling value corresponding to the target transmitting signal to the radio frequency transceiver 210 for display. The radio frequency transceiver 210 can record the power coupling value corresponding to the target transmitting signal.

[0055] The radio frequency transceiver 210 is also used to determine the power corresponding relationship according to the transmitting power corresponding to the target transmitting signal, the target power and the corresponding power coupling value, and calibrate the transmitting power of the transmitting signal according to the power corresponding relationship.

[0056] In the embodiments of the present application, the radio frequency transceiver 210 receives the information of the power coupling value corresponding to the target transmission signal fed back by the coupler 220, and receives the information of the target transmission signal with each power measurement value being the target power fed back by the radio frequency test device 230, and then combines the three types of power values, i.e., the power coupling value corresponding to the target transmission signal according to the transmission power of the target transmission signal, the power measurement value of the target transmission signal, and the target power, to determine the corresponding relationship between any two types of power values.

[0057] By using the above embodiments, after the target power of the signal is detected by using the radio frequency test device 230, the radio frequency calibration circuit determines the corresponding relationship between different powers according to the target power and the power coupling value corresponding to the target power obtained by the coupler 220, and calibrates the transmission power of the transmission signal in the radio frequency signal according to the corresponding relationship, thereby effectively reducing the use of the radio frequency test device 230, reducing the calibration cost, and simplifying and flexibly implementing the calibration process.

[0058] In one embodiment, the radio frequency test device 230 is further configured to select N target transmission signals from the plurality of transmission signals, the power measurement values of the N target transmission signals are N different target powers respectively, and N is an integer greater than 1; and determine the transmission power corresponding to each target transmission signal.

[0059] In the embodiment of the present application, when the first path between the coupler 220 and the radio frequency test device 230 is turned on and the second path between the coupler 220 and the load impedance 240 is turned off, the radio frequency test device 230 receives the transmission signals of different transmission powers transmitted by the coupler 220 and measures the transmission signals of different transmission powers, and then selects at least two different power measurement values as target powers from the power measurement values of the transmission signals by user selection or automatic selection of the radio frequency circuit, and the transmission signal with the power measurement value as the target power is the selected target transmission signal. That is, the radio frequency test device 230 can select at least two target transmission signals from the multiple transmission signals, and the power measurement values of the selected target transmission signals are different. After selecting at least two target transmission signals, the radio frequency test device 230 can determine the transmission power of the radio frequency transceiver 210 when transmitting the target transmission signal, and the transmission power is the transmission power corresponding to the target transmission signal. Preferably, three different power measurement values are selected as target powers, for example, the selected target powers are 15 dBm, 0 dBm and -30 dBm, that is, the transmission signals with the power measurement values of 15 dBm, 0 dBm and -30 dBm are selected as target transmission signals, and the transmission powers of the three target transmission signals are determined. The target transmission signal corresponding to 0 dBm is a transmission signal with a target power of 1 mw, and -30 dBm is a transmission signal with a target power of 1 mw. The radio frequency test device 230 can feed back the information of the power measurement values of the target transmission powers, that is, the information of the selected target powers to the radio frequency transceiver 210.

[0060] The radio frequency transceiver 210 is further configured to determine a transmission power difference value according to the first transmission power of the first target transmission signal and the second transmission power of the second target transmission signal, determine a power measurement difference value according to the first target power of the first target transmission signal and the second target power of the second target transmission signal, and determine a power coupling difference value according to the first power coupling value of the first target transmission signal and the second power coupling value of the second target transmission signal, and the first target transmission signal and the second target transmission signal are any two of the N target transmission signals.

[0061] In the embodiments of the present application, when the second path between the coupler 220 and the load impedance 240 is turned on and the first path between the coupler 220 and the radio frequency test device 230 is turned off, the radio frequency transceiver 210 can preferentially send the target transmission signals into the coupler 220 according to the recorded target transmission signals in the process of transmitting transmission signals with different transmission powers. The coupler 220 can receive the target transmission signals and transmission signals with other transmission powers sent by the radio frequency transceiver 210, and measure the power coupling values corresponding to the target transmission signals. For example, the target transmission signals with power measurement values of 15 dBm, 0 dBm and -30 dBm may, respectively, correspond to transmission powers of 16 dBm, 1 dBm and -29 dBm. Then, the radio frequency transceiver 210 can preferentially send transmission signals with transmission powers of 16 dBm, 1 dBm and -29 dBm into the coupler 220. The coupler 220 measures the three power coupling values, i.e., the power coupling values corresponding to the target transmission signals, which can be 16 dBm, 0.5 dBm and -32 dBm. At this time, the coupler 220 can feed back the information of the measured power coupling values corresponding to the target transmission signals to the radio frequency transceiver 210 for display. The radio frequency transceiver 210 can record the power coupling values corresponding to the target transmission signals.

[0062] The radio frequency transceiver 210 can receive the transmission powers of each target transmission signal, the target powers of each target transmission signal, i.e., the power measurement values of each target transmission signal, and the power coupling values of each target transmission signal. The radio frequency transceiver 210 can arbitrarily select two target transmission signals from the plurality of target transmission signals, which are a first target transmission signal and a second target transmission signal. At this time, the radio frequency transceiver 210 can calculate the difference between the transmission power corresponding to the first target transmission signal, i.e., the first transmission power, and the transmission power corresponding to the second target transmission signal, i.e., the second transmission power, to obtain a transmission power difference. The radio frequency transceiver 210 can also calculate the difference between the target power corresponding to the first target transmission signal, i.e., the first target power, and the target power corresponding to the second target transmission signal, i.e., the second target power, to obtain a power measurement difference. The radio frequency transceiver 210 can also calculate the difference between the power coupling value corresponding to the first target transmission signal, i.e., the first power coupling value, and the power coupling value corresponding to the second target transmission signal, i.e., the second power coupling value, to obtain a power coupling difference. The radio frequency transceiver 210 can calculate the above three differences in sequence or simultaneously, which is not limited herein.

[0063] The radio frequency transceiver 210 is further configured to determine a power correspondence relationship according to the transmit power difference, the power measurement difference and the power coupling difference.

[0064] In the embodiment of the present application, after the radio frequency transceiver 210 calculates the transmit power difference, the power measurement difference and the power coupling difference, the radio frequency transceiver 210 can determine the correspondence relationship between any two types of power values among the transmit power, the power measurement value and the power coupling value according to the three differences. For example, if the transmit power difference is 10 dBm, the power measurement difference is 15 dBm and the power coupling difference is 5 dBm, it can be determined that the correspondence relationship between the three types of power values is 2:3:1.

[0065] In the embodiment of the present application, the correspondence relationship between different power values is determined by the difference between the power values corresponding to any two target transmit powers, which can improve the accuracy of the determined correspondence relationship and further improve the calibration effect of the transmit power of the transmit signal in the radio frequency signal.

[0066] In one embodiment, the radio frequency transceiver 210 is further configured to determine a multiple relationship between the transmit power difference and the unit transmit power;

[0067] According to the power coupling difference and the multiple relationship, the power coupling increase corresponding to the unit transmit power is determined;

[0068] According to the power measurement difference and the multiple relationship, the power measurement increase corresponding to the unit transmit power is determined;

[0069] According to the power coupling increase and the power measurement increase, a standard power increase is obtained; the standard power increase refers to the power measurement value increased by the power measurement increase when the power coupling increase is a unit power coupling value;

[0070] The radio frequency transceiver 210 is further configured to calibrate the transmit power of the transmit signal according to the standard power increase.

[0071] In the embodiment of the present application, after the radio frequency transceiver 210 determines the differences between any two target transmit powers, that is, the transmit power difference, the power measurement difference and the power coupling difference between the first target transmit power and the second target transmit power, the radio frequency transceiver 210 can first calculate the multiple relationship between the transmit power difference and a set unit transmit power. For example, if a set unit transmit power is 1 dBm and the transmit power difference between the first target transmit signal and the second target transmit signal is 10 dBm, the multiple relationship between the transmit power difference and the unit transmit power can be determined as 10.

[0072] After determining the multiple relationship, the radio frequency transceiver 210 can calculate the quotient between the power coupling difference and the multiple relationship, and then determine the power coupling increase corresponding to the unit transmission power. For example, the power coupling difference between the first target transmission signal and the second target transmission signal is 5dBm, and the determined multiple relationship is 10, so the power coupling increase corresponding to the unit transmission power can be determined as 0.5, that is, when the transmission power increases by 1dBm, the power coupling value will correspondingly increase by 0.5dBm.

[0073] Similarly, after determining the multiple relationship, the transceiver can calculate the quotient between the power measurement difference and the multiple relationship, and then determine the power measurement increase corresponding to the unit transmission power. For example, the power measurement difference between the first target transmission signal and the second target transmission signal is 15dBm, and the determined multiple relationship is 10, so the power measurement increase corresponding to the unit transmission power can be determined as 1.5, that is, when the transmission power increases by 1dBm, the power measurement value will correspondingly increase by 1.5dBm.

[0074] In the embodiment of the present application, after the radio frequency transceiver 210 determines the power coupling increase corresponding to the unit transmission power and the power measurement increase corresponding to the unit transmission power, the ratio of the two increases can be used to directly determine the corresponding relationship between the power coupling value and the power measurement value, which is the standard power increase. For example, the power coupling increase corresponding to the unit transmission power is 0.5, and the power measurement increase corresponding to the unit transmission power is 1.5, so the standard power increase is 3, that is, when the power coupling value increases by 1, the power measurement value will increase by 3. At this time, the radio frequency transceiver 210 can determine the change relationship between any power value change of the three types of power values, i.e., transmission power, power coupling value and power measurement value, and the change of other values. At this time, the change relationship is the power corresponding relationship. The radio frequency transceiver 210 can determine the possible change of the transmission power of the transmission signal according to the corresponding relationship, and then calibrate the transmission power of the transmission signal. The increase of different powers can better determine the corresponding relationship between different power values, and further improve the effect of calibrating the transmission power of the transmission signal.

[0075] In one embodiment, the coupler 220 is also used to measure the power of the multiple transmission signals sent by the radio frequency transceiver 210 to determine the power coupling value corresponding to each transmission signal when the second path between the coupler 220 and the load impedance 240 is turned on and the first path is turned off.

[0076] In the embodiment of the present application, the coupler 220 receives the transmission signals of different transmission powers transmitted by the radio transceiver 210 and measures the power of the transmission signals to obtain the power coupling values corresponding to the transmission signals when the second path between the coupler 220 and the load impedance 240 is turned on and the first path is turned off. The coupler 220 can feed back the power coupling values corresponding to the transmission signals to the radio transceiver 210 for display in the radio transceiver 210.

[0077] The radio transceiver 210 is further configured to determine the coupling difference between the power coupling values corresponding to the transmission signals and the power coupling value corresponding to the third target power, wherein the third target power is any target power; determine the power measurement value range corresponding to the third target power according to the coupling difference corresponding to each transmission signal, the standard power increase and the third target power.

[0078] The radio transceiver 210 is further configured to calibrate the transmission power of the transmission signals according to the power measurement value range corresponding to each target power.

[0079] In the embodiment of the present application, the radio transceiver 210 selects a target power as the third target power from the multiple target transmission signals after receiving the power coupling values corresponding to the transmission signals fed back by the coupler 220. The radio transceiver 210 can determine the power coupling value of the target transmission signal corresponding to the third target power according to the power coupling values corresponding to the target transmission signals previously fed back by the coupler 220. Then the radio transceiver 210 can calculate the coupling difference between the power coupling values corresponding to the transmission signals and the power coupling value corresponding to the selected target transmission signal. For example, the power coupling value corresponding to the selected target transmission signal is 10 dBm, and the power coupling values corresponding to the three transmission signals are 15 dBm, 5 dBm and 20 dBm, respectively. Then the coupling differences between the three transmission signals and the selected target transmission signal are 5 dBm, -5 dBm and 10 dBm, respectively.

[0080] After the radio frequency transceiver 210 determines the coupling difference between each transmission signal and the selected target transmission signal, the radio frequency transceiver 210 can determine the power measurement value range of each transmission signal at the selected third target power according to the standard power increase, that is, the change relationship between the power measurement value corresponding to the power coupling value of the transmission power when the transmission power changes. According to the power measurement value range at each target power, the radio frequency transceiver 210 can determine a total power measurement value range in which the transmission signals at different transmission powers are located. The radio frequency transceiver 210 calibrates the transmission power of the transmission signal according to the total power measurement value range, so that the transmission power of the transmission signal can be located within a specified transmission power range. This can make the basis for radio frequency calibration more accurate and further improve the effect of calibrating the transmission power of the transmission signal.

[0081] In one embodiment, the radio frequency transceiver 210 is further configured to calculate the product of the coupling difference corresponding to each transmission signal and the standard power increase, and sum each product with the third target power, and determine the power measurement value range corresponding to the third target power according to the multiple results obtained after the summation.

[0082] In the embodiments of the present application, when the radio frequency transceiver 210 calculates the power measurement value range corresponding to each target power, the radio frequency transceiver 210 can calculate according to the following formula (1).

[0083] P 目标功率 +(P 耦合 -P 目标耦合 )×power measurement increase (1)

[0084] Wherein, P 目标功率 is the selected power measurement value, that is, the target power, P 耦合 is the power coupling value of each transmission signal, and P 目标耦合 is the power coupling value of the target transmission signal whose power measurement value is the target power. P 目标功率 corresponds to the same target transmission signal as P 目标耦合 .

[0085] That is, after the radio frequency transceiver 210 calculates the coupling difference between each transmission signal and the selected target transmission signal, the radio frequency transceiver 210 calculates the product of each coupling difference and the standard power increase to determine how much the power measurement value of the transmission signal relative to the target transmission signal changes after the transmission signal changes the coupling difference relative to the target transmission signal. Finally, the radio frequency transceiver 210 calculates the sum between the product and the power measurement value of the target transmission signal to determine the power measurement value range in which each transmission signal is located relative to the target transmission signal.

[0086] In the embodiment of the present application, the radio transceiver 210 can sort the target powers in ascending order, for example, -15 dBm, 0 dBm and 30 dBm. Then the radio transceiver 210 calculates the power measurement value ranges corresponding to -15 dBm, 0 dBm and 30 dBm respectively by substituting -15 dBm, 0 dBm and 30 dBm and the power coupling values corresponding to -15 dBm, 0 dBm and 30 dBm respectively into the above formula (1). At this time, the power measurement value range corresponding to -15 dBm can be determined as the power measurement value range corresponding to the increase from -30 dBm to 0 dBm, the power measurement value range corresponding to 0 dBm can be determined as the power measurement value range corresponding to the increase from 0 dBm to 15 dBm, and the power measurement value range corresponding to 30 dBm can be determined as the power measurement value range between 15 dBm and the possible maximum power measurement value. One power measurement value range from the power measurement value of the minimum target power to the possible maximum power measurement value can be determined, and the transmission power of the transmission signal is calibrated according to the range, which improves the accuracy of calibration.

[0087] In some embodiments, the radio transceiver 210 is further configured to determine the minimum target power among the target powers, calculate the difference between each coupling difference and the minimum target power after calculating the product between each coupling difference and the standard power increase, and determine the minimum power measurement value range according to each difference.

[0088] In the embodiment of the present application, the radio transceiver 210 can further calculate according to the following formula (2) when calculating the power measurement value range corresponding to the minimum target power.

[0089] P 最小目标功率 -(P 耦合 -P 最小目标耦合 )×power measurement increase (2)

[0090] wherein P 最小目标功率 is the selected minimum power measurement value, i.e. the minimum target power, P 耦合 is the power coupling value of each transmission signal, P 最小目标耦合 is the power coupling value of the target transmission signal of the minimum target power. P 最小目标功率 and P 最小目标耦合 correspond to the same minimum target transmission signal.

[0091] That is, after the radio frequency transceiver 210 calculates the coupling difference between each of the transmission signals and the selected target transmission signal, the radio frequency transceiver 210 calculates the product between each of the coupling differences and the standard power increase to determine how much the power measurement of the transmission signal changes with respect to the target transmission signal after the transmission signal changes by the coupling difference. Finally, the radio frequency transceiver 210 calculates the difference between the product and the minimum target power to determine the power measurement range between the target transmission signal and the possible minimum transmission power.

[0092] In the embodiment of the present application, the radio frequency transceiver 210 can sort the target powers from small to large, for example, -15 dBm, 0 dBm and 30 dBm. Then, after the radio frequency transceiver 210 calculates the power measurement ranges corresponding to -15 dBm, 0 dBm and 30 dBm respectively according to the above formula (1), the minimum target power is -15 dBm. Therefore, the radio frequency transceiver 210 can calculate a power measurement range by the above formula (2), and determine the power measurement range between -15 dBm and the possible minimum power measurement. The power measurement range between the minimum target power and the possible minimum power measurement can be further determined, and a more complete power measurement range can be obtained, and the transmission power of the transmission signal can be calibrated according to the range, and the calibration accuracy is further improved.

[0093] Please refer to Figure 3 , Figure 3 for a structural schematic diagram of a radio frequency calibration circuit in an embodiment. As shown in Figure 3 , the radio frequency calibration circuit 10 includes a radio frequency transceiver 210, a coupler 220, a radio frequency test device 230, a load impedance 240 and a switch device 310. The radio frequency transceiver 210 is connected with the coupler 220, and the coupler 220 is connected with the radio frequency test device 230 and the load impedance 240 through the switch device 310.

[0094] The switch device 310 is used to first turn on the first path between the coupler 220 and the radio frequency test device 230, and turn off the second path between the coupler 220 and the load impedance 240; and after the radio frequency test device 230 determines the transmission power corresponding to the target transmission signal, the switch device 310 is used to turn on the second path between the coupler 220 and the load impedance 240, and turn off the first path between the coupler 220 and the radio frequency test device 230.

[0095] In the embodiment of the present application, the switch device 310 can first turn on the first path between the coupler 220 and the radio frequency test device 230 and turn off the second path between the coupler 220 and the load impedance 240 in the process of radio frequency calibration, so that the radio frequency test device 230 can receive the multiple transmission signals transmitted by the coupler 220, perform power measurement on the multiple transmission signals, determine the power measurement values corresponding to the respective transmission signals, select a target transmission signal with a target power from the multiple transmission signals, and determine the transmission power corresponding to the target transmission signal. After the radio frequency test device 230 determines the transmission power corresponding to the target transmission signal, the switch device 310 can turn on the second path between the coupler 220 and the load impedance 240 and turn off the first path between the coupler 220 and the radio frequency test device 230, so that the coupler 220 can determine the power coupling value corresponding to the target transmission signal, and the radio frequency transceiver 210 can determine the power correspondence relationship according to the transmission power corresponding to the target transmission signal, the target power, and the corresponding power coupling value, and calibrate the transmission power of the transmission signal according to the power correspondence relationship. The switch device 310 can be a single-pole double-throw switch or other interface selector, which is not limited here. By setting the switch device 310, the on-off between the first path and the second path can be conveniently controlled, and the efficiency of the radio frequency calibration circuit in the process of calibrating the transmission power of the transmission signal can be improved.

[0096] Please refer to Figure 4 , Figure 4 is a structural schematic diagram of a radio frequency calibration circuit in another embodiment. As shown in Figure 4 , the radio frequency calibration circuit 10 includes a radio frequency transceiver 210, a coupler 220, a radio frequency test device 230, a load impedance 240, a duplexer 410, and a filter 420; the radio frequency transceiver 210 is connected with the coupler 220, the duplexer 410 is connected with the radio frequency transceiver 210 and the coupler 220 respectively; the filter 420 is connected with the radio frequency transceiver 210 and the coupler 220 respectively, and the coupler 220 is connected with the radio frequency test device 230 and the load impedance 240 respectively.

[0097] The radio frequency transceiver 210 is further configured to, if the radio frequency calibration circuit is in a time division duplex mode, send transmission signals with different transmission powers through the duplexer 410; and if the radio frequency calibration circuit is in a frequency division duplex mode, send multiple transmission signals with different transmission powers to the filter 420.

[0098] In the embodiments of the present application, the electronic device 10 has a frequency division duplex mode and a time division duplex mode in the communication process. Therefore, in the radio frequency calibration process, the radio frequency calibration circuit needs to be able to calibrate the above two duplex modes. Therefore, when the radio frequency calibration circuit or the radio frequency transceiver 210 is in the time division duplex mode, the radio frequency transceiver 210 can send the transmission signals with different transmission powers to the duplexer 410. When the radio frequency calibration circuit or the radio frequency transceiver 210 is in the frequency division duplex mode, the radio frequency transceiver 210 can send the transmission signals with different transmission powers to the filter 420.

[0099] The duplexer 410 is used to isolate the transmission channel and the reception channel in the time division duplex mode, so as to isolate the transmission signals and the reception signals in the radio frequency signals when the radio frequency calibration circuit is in the time division duplex mode.

[0100] In the embodiments of the present application, when the radio frequency calibration circuit is in the time division duplex mode, the transmission channel and the reception channel are the same channels with different signal transmission directions, that is, at different time, one channel can be used as a transmission channel or a reception channel. Therefore, when the radio frequency calibration circuit is in the time division duplex mode, the duplexer 410 can isolate the transmission channel and the reception channel in the time division duplex mode according to the time when the radio frequency transceiver 210 sends the transmission signals with different transmission powers, so as to isolate the transmission signals and the reception signals in the radio frequency signals when the radio frequency calibration circuit is in the time division duplex mode. This can avoid the mutual interference between the reception signals and the transmission signals in the time division duplex mode, so as to avoid errors in the calibration process and improve the calibration effect of the radio frequency calibration circuit in the time division duplex mode.

[0101] The filter 420 is used to isolate the transmission path and the reception path in the frequency division duplex mode, so as to isolate the transmission signals and the reception signals in the radio frequency signals when the radio frequency calibration circuit is in the frequency division duplex mode.

[0102] In the embodiments of the present application, when the radio frequency calibration circuit is in the frequency division duplex mode, the transmission channel and the reception channel are different channels with different signal transmission directions, that is, the transmission channel and the reception channel have different frequencies and are two different channels. Therefore, when the radio frequency calibration circuit is in the frequency division duplex mode, the filter 420 can isolate the transmission channel and the reception channel in the frequency division duplex mode according to the frequency of the transmission signals sent by the radio frequency transceiver 210, so as to isolate the transmission signals and the reception signals in the radio frequency signals when the radio frequency calibration circuit is in the frequency division duplex mode. This can avoid the mutual interference between the reception signals and the transmission signals in the frequency division duplex mode, so as to avoid errors in the calibration process and improve the calibration effect of the radio frequency calibration circuit in the frequency division duplex mode.

[0103] Please refer to Figure 5 , Figure 5This is a schematic diagram of the radio frequency calibration circuit in yet another embodiment. Figure 5 As shown, the RF calibration circuit 10 includes an RF transceiver 210, a coupler 220, an RF test device 230, a load impedance 240, and an RF power amplifier 510; the RF transceiver 210 is connected to the coupler 220, and the coupler 220 is connected to the RF test device 230 and the load impedance 240 respectively; the RF power amplifier 510 is connected to the RF transceiver 210 and the coupler 220 respectively.

[0104] The radio frequency power amplifier 510 is used to amplify the power of each transmit signal sent by the radio frequency transceiver 210 to obtain transmit signals with different transmit powers, and send the transmit signals with different transmit powers to the coupler 220.

[0105] In this embodiment, the transmitted signal from the RF transceiver 210 needs to be amplified by the RF power amplifier 510 to achieve the different transmission powers required for communication. At this time, the RF power amplifier 510 amplifies the power of the transmitted signal and sends the resulting transmitted signals with different transmission powers to the coupler 220 so that the RF calibration circuit can perform the subsequent RF calibration process. This allows the power of the transmitted signal from the RF transceiver 210 to be adjusted to meet the power requirements during the RF calibration process.

[0106] Please see Figure 6 , Figure 6 This is a schematic diagram of the radio frequency calibration circuit in another embodiment. Figure 6 As shown, the RF calibration circuit 10 includes an RF transceiver 210, a coupler 220, an RF test device 230, a load impedance 240, an RF power amplifier 510, a duplexer 410, a filter 420, and multiple switching devices 310. Each switching device 310 includes a first switch, a second switch, and the switching device itself. The RF transceiver 210 is connected to both the coupler 220 and the RF power amplifier 510. The RF power amplifier 510 is connected to the multiple duplexers 410 and the filter 420 via the first switch. The coupler 220 is also connected to the multiple duplexers 410 and the filter 420 via the second switch. The coupler 220 is also connected to the RF test device 230 and the load impedance 240 via the switching device 310. The RF test device 230 includes an RF test socket 610 and an RF test suite 20. The RF test socket 610 is connected to the coupler 220 via the switching device 310. The RF test socket 610 is also connected to the RF test suite 20 and an antenna.

[0107] In the embodiment of the present application, the radio frequency transceiver 210 sends the transmission signals with different power in a frequency band to the radio frequency power amplifier 510. The radio frequency power amplifier 510 amplifies the transmission signals sent by the radio frequency transceiver 210 to obtain transmission signals with different transmission power. The first switch connects the path between the radio frequency power amplifier 510 and the duplexer 410 or the filter 420 of the corresponding frequency band according to the frequency band of the transmission signal. If the radio frequency calibration circuit is in the time division duplex mode, the radio frequency power amplifier 510 sends the transmission signals with different transmission power to the duplexer 410 corresponding to the frequency band of the transmission signal. If the radio frequency calibration circuit is in the frequency division duplex mode, the radio frequency power amplifier 510 sends the transmission signals with different transmission power to the filter 420 corresponding to the frequency band of the transmission signal. The second switch also connects the path between the coupler 220 and the duplexer 410 or the filter 420 of the corresponding frequency band according to the frequency band of the transmission signal. Therefore, if the radio frequency calibration circuit is in the time division duplex mode, the duplexer 410 corresponding to the frequency band of the transmission signal sends the isolated transmission signal to the coupler 220. If the radio frequency calibration circuit is in the frequency division duplex mode, the filter 420 corresponding to the frequency band of the transmission signal sends the isolated transmission signal to the coupler 220.

[0108] When the switch device 310 connects the first path between the radio frequency test seat 610 and the coupler 220, the radio frequency synthesizer 20 receives the transmission signals transmitted by the coupler 220, measures the power of the transmission signals to determine the power measurement value corresponding to each transmission signal, selects the target transmission signal with the target power from the transmission signals, and determines the transmission power corresponding to the target transmission signal. When the switch device 310 connects the second path between the coupler 220 and the load impedance 240 and disconnects the first path, the coupler 220 determines the power coupling value corresponding to the target transmission signal and feeds back the power coupling value corresponding to the target transmission signal to the radio frequency transceiver 210. The radio frequency transceiver 210 determines the power corresponding relationship according to the transmission power corresponding to the target transmission signal, the target power and the corresponding power coupling value, and calibrates the transmission power of the transmission signal in the frequency band according to the power corresponding relationship. The calibration of the transmission power of the transmission signal in other frequency bands can also be realized by performing the above steps. In addition, when the switch device 310 connects the first path between the radio frequency test seat 610 and the coupler 220, the received signal received by the antenna can pass through the coupler 220 and the duplexer 410 or the filter 420 of the corresponding frequency band and finally be transmitted to the radio frequency transceiver 210.

[0109] Please refer to Figure 7 , Figure 7 The flowchart of a radio frequency calibration method in one embodiment is shown in FIG. 1. As shown in FIG. 1, the radio frequency calibration method includes the following steps. Figure 7As shown, the method can be applied to the radio frequency calibration circuit which comprises the radio frequency transceiver 210, the coupler 220, the radio frequency test device 230 and the load impedance 240, and the method comprises:

[0110] 710、in the case that the first path between the coupler 220 is turned on, the radio frequency test device 230 measures the power of the plurality of transmission signals transmitted by the radio frequency transceiver 210 to determine the power measurement value corresponding to each transmission signal, selects a target transmission signal with a target power from the plurality of transmission signals, and determines the transmission power corresponding to the target transmission signal.

[0111] 720、in the case that the second path between the load impedance 240 is turned on and the first path is turned off, the coupler 220 determines the power coupling value corresponding to the target transmission signal.

[0112] 730、the radio frequency transceiver 210 determines the power correspondence relationship according to the transmission power corresponding to the target transmission signal, the target power and the corresponding power coupling value, and calibrates the transmission power of the transmission signal according to the power correspondence relationship.

[0113] In some embodiments, in step 710, the target transmission signal with a target power is selected from the plurality of transmission signals, and the transmission power corresponding to the target transmission signal is determined, comprising:

[0114] selecting N target transmission signals from the plurality of transmission signals, the power measurement values of the N target transmission signals are N different target powers respectively, and N is an integer greater than 1; and determining the transmission power corresponding to each target transmission signal;

[0115] In step 730, the radio frequency transceiver 210 determines the power correspondence relationship according to the transmission power corresponding to the target transmission signal, the target power and the corresponding power coupling value, and calibrates the transmission power of the transmission signal according to the power correspondence relationship, comprising:

[0116] the radio frequency transceiver 210 determines the transmission power difference value according to the first transmission power of the first target transmission signal and the second transmission power of the second target transmission signal;

[0117] the radio frequency transceiver 210 determines the power measurement difference value according to the first target power of the first target transmission signal and the second target power of the second target transmission signal;

[0118] the radio frequency transceiver 210 determines the power coupling difference value according to the first power coupling value of the first target transmission signal and the second power coupling value of the second target transmission signal; the first target transmission signal and the second target transmission signal are any two of the N target transmission signals;

[0119] The power correspondence is determined by the radio frequency transceiver 210 according to the transmission power difference, the power measurement difference and the power coupling difference, and the transmission power of the transmission signal is calibrated according to the power correspondence.

[0120] In some embodiments, in the step of determining the power correspondence by the radio frequency transceiver 210 according to the transmission power difference, the power measurement difference and the power coupling difference, and calibrating the transmission power of the transmission signal according to the power correspondence, it includes:

[0121] A multiplication relationship between the transmission power difference and the unit transmission power is determined by the radio frequency transceiver 210;

[0122] The power coupling increase corresponding to the unit transmission power is determined by the radio frequency transceiver 210 according to the power coupling difference and the multiplication relationship;

[0123] The power measurement increase corresponding to the unit transmission power is determined by the radio frequency transceiver 210 according to the power measurement difference and the multiplication relationship;

[0124] The standard power increase is obtained by the radio frequency transceiver 210 according to the power coupling increase and the power measurement increase; the standard power increase refers to the power measurement value increased by the power measurement increase when the power coupling increase is a unit power coupling value;

[0125] The transmission power of the transmission signal is calibrated by the radio frequency transceiver 210 according to the standard power increase.

[0126] In some embodiments, after the step of obtaining the standard power increase by the radio frequency transceiver 210 according to the power coupling increase and the power measurement increase, the following steps can also be performed:

[0127] The power of the multiple transmission signals transmitted by the radio frequency transceiver 210 is measured by the coupler 220 to determine the power coupling value corresponding to each transmission signal in the case that the second path between the load impedance 240 is turned on and the first path is turned off;

[0128] The coupling difference between the power coupling value corresponding to each transmission signal and the corresponding power coupling value of the third target power is determined by the radio frequency transceiver 210, wherein the third target power is any target power;

[0129] The power measurement value range corresponding to the third target power is determined by the radio frequency transceiver 210 according to the coupling difference corresponding to each transmission signal, the standard power increase and the third target power;

[0130] In the step of calibrating the transmission power of the transmission signal by the radio frequency transceiver 210 according to the standard power increase, it includes:

[0131] The transmission power of the transmission signal is calibrated by the radio frequency transceiver 210 according to the power measurement value range corresponding to each target power.

[0132] In some embodiments, in the step of determining the power measurement value range corresponding to the third target power by the radio frequency transceiver 210 according to the coupling difference corresponding to each transmission signal, the standard power increment, and the third target power, the step comprises:

[0133] The product of the coupling difference corresponding to each transmission signal and the standard power increment is calculated, and each product is summed with the third target power, and the power measurement value range corresponding to the third target power is determined according to the multiple results obtained after the summation.

[0134] In some embodiments, before the step of measuring the power of the multiple transmission signals sent by the radio frequency transceiver 210 by the radio frequency test device 230 in the case that the first path between the coupler 220 is turned on in the step 710, the following step can be further performed:

[0135] The first path between the coupler 220 and the radio frequency test device 230 is turned on by the switch device 310, and the second path between the coupler 220 and the load impedance 240 is turned off.

[0136] Before the step of selecting the target transmission signal with the target power from the multiple transmission signals in the step 710, and determining the transmission power corresponding to the target transmission signal, the following step can be further performed:

[0137] The second path between the coupler 220 and the load impedance 240 is turned on by the switch device 310, and the first path between the coupler 220 and the radio frequency test device 230 is turned off.

[0138] In some embodiments, before the step of measuring the power of the multiple transmission signals sent by the radio frequency transceiver 210 by the radio frequency test device 230 in the case that the first path between the coupler 220 is turned on in the step 710, the following step can be further performed:

[0139] If the radio frequency calibration circuit is in a time division duplex mode, the radio frequency transceiver 210 sends multiple transmission signals with different transmission powers to the duplexer 410; and if the radio frequency calibration circuit is in a frequency division duplex mode, the radio frequency transceiver 210 sends multiple transmission signals with different transmission powers to the filter 420;

[0140] The transmission channel and the reception channel in the time division duplex mode are isolated by the duplexer 410, so as to isolate the transmission signal and the reception signal in the radio frequency signal when the radio frequency calibration circuit is in the time division duplex mode, and transmit the transmission signal to the coupler 220.

[0141] The transmitting path and the receiving path in the frequency division duplex mode are isolated by the filter 420, so as to isolate the transmitting signal and the receiving signal in the radio frequency signal and transmit the transmitting signal to the coupler 220 when the radio frequency calibration circuit is in the frequency division duplex mode.

[0142] In some embodiments, before the power of the multiple transmitting signals transmitted by the radio frequency transceiver 210 is measured by the radio frequency test device 230 in the case that the first path between the radio frequency transceiver 210 and the coupler 220 is turned on in step 710, the following steps can also be performed:

[0143] The radio frequency power amplifier 510 is used to amplify the power of each transmitting signal transmitted by the radio frequency transceiver 210, so as to obtain transmitting signals with different transmitting powers, and transmit the transmitting signals with different transmitting powers to the coupler 220.

[0144] Please refer to Figure 8 , Figure 8 is a structural schematic diagram of an electronic device 10 disclosed in an embodiment. As shown in Figure 8 , the electronic device 10800 can include:

[0145] The memory 810 stores executable program codes.

[0146] The processor 820 is coupled with the memory 810.

[0147] The processor 820 invokes the executable program codes stored in the memory 810 to execute any of the radio frequency calibration methods disclosed in the embodiments of the present application.

[0148] It should be noted that Figure 8 The electronic device 10 shown in the figure can also include a power supply, an input button, a camera, a loudspeaker, a screen, an RF circuit, a Wi-Fi module, a Bluetooth module, and other components not shown, which are not described herein.

[0149] The embodiments of the present application disclose a computer readable storage medium storing a computer program, wherein the computer program causes a computer to execute any of the radio frequency calibration methods disclosed in the embodiments of the present application.

[0150] The embodiments of the present application disclose a computer program product, which includes a non-transitory computer readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute any of the earphone detection methods disclosed in the embodiments of the present application.

[0151] It should be understood that the term "one embodiment" or "an embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It will also be appreciated by those of skill in the art that references to a structure or feature that is

[0152] In various embodiments of the present application, it should be understood that the magnitude of the serial number of the above-mentioned processes does not mean the inevitable sequence of execution, and the execution sequence of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0153] The units described above as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e. they can be located in one place, or they can be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0154] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0155] The integrated unit described above, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a computer accessible memory. Based on such understanding, the technical solutions of the present application, essentially or the part that makes a contribution to the prior art, or all or part of the technical solutions, can be embodied in the form of a software product, which is stored in a memory and includes a number of steps for causing a computer device (which can be a personal computer, a server or a network device, etc., and specifically can be a processor in the computer device) to execute the methods of the embodiments of the present application described above.

[0156] Those skilled in the art can understand that all or part of the steps of various methods in the above embodiments can be completed by instructing the relevant hardware through a program, and the program can be stored in a computer readable storage medium, including Read-Only Memory (ROM), Random Access Memory (RAM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (EPROM), One-time Programmable Read-Only Memory (OTPROM), Electrically-Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory (CD-ROM) or other optical disk storage, magnetic disk storage, magnetic tape storage, or any other medium that can be used to carry or store data in a computer readable manner.

[0157] The radio frequency calibration circuit, the electronic device and the radio frequency calibration method disclosed in the embodiments of the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above embodiment descriptions are only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed, and the above descriptions should not be understood as limiting the present application.

Claims

1. A radio frequency calibration circuit, characterized by, The radio frequency calibration circuit comprises a radio frequency transceiver, a coupler, a radio frequency test device, a load impedance and a switching device; the radio frequency transceiver is connected with the coupler, and the coupler is connected with the radio frequency test device and the load impedance respectively; The radio frequency transceiver is configured to send a plurality of transmission signals with different transmission powers to the coupler respectively; The radio frequency test device is configured to, when a first path between the coupler and the radio frequency test device is turned on, receive the plurality of transmission signals transmitted by the coupler, perform power measurement on the plurality of transmission signals, determine a power measurement value corresponding to each of the transmission signals, select a target transmission signal with a target power from the plurality of transmission signals, and determine a transmission power corresponding to the target transmission signal; The coupler is configured to, when a second path between the coupler and the load impedance is turned on and the first path is turned off, determine a power coupling value corresponding to the target transmission signal; The switching device is configured to first turn on the first path between the coupler and the radio frequency test device, and turn off the second path between the coupler and the load impedance; and after the radio frequency test device determines the transmission power corresponding to the target transmission signal, turn on the second path between the coupler and the load impedance, and turn off the first path between the coupler and the radio frequency test device; The radio frequency transceiver is further configured to determine a power correspondence relationship according to the transmission power corresponding to the target transmission signal, the target power and the corresponding power coupling value, and calibrate the transmission power of the transmission signal according to the power correspondence relationship. The radio frequency test device is further configured to select N target transmission signals from the plurality of transmission signals, the power measurement values of the N target transmission signals are N different target powers respectively, and N is an integer greater than 1; and determine the transmission power corresponding to each of the target transmission signals; 2. The radio frequency calibration circuit of claim 1, wherein, The radio frequency transceiver is further configured to determine a transmission power difference value according to a first transmission power of a first target transmission signal and a second transmission power of a second target transmission signal, determine a power measurement difference value according to a first target power of the first target transmission signal and a second target power of the second target transmission signal, and determine a power coupling difference value according to a first power coupling value of the first target transmission signal and a second power coupling value of the second target transmission signal; the first target transmission signal and the second target transmission signal are any two of the N target transmission signals; The radio frequency transceiver is further configured to determine the power correspondence relationship according to the transmission power difference value, the power measurement difference value and the power coupling difference value. ​ ​ 3. The radio frequency calibration circuit of claim 2, wherein, The radio frequency transceiver is further configured to determine a multiplication relationship between the transmission power difference and the unit transmission power; determine a power coupling increase corresponding to the unit transmission power according to the power coupling difference and the multiplication relationship; determine a power measurement increase corresponding to the unit transmission power according to the power measurement difference and the multiplication relationship; and obtain a standard power increase according to the power coupling increase and the power measurement increase; the standard power increase refers to a power measurement value increased by the power measurement increase when the power coupling increase is a unit power coupling value. The radio frequency transceiver is further configured to calibrate the transmission power of the transmission signal according to the standard power increase.

4. The radio frequency calibration circuit of claim 3, wherein, The coupler is further configured to measure the power of the transmission signals transmitted by the radio frequency transceiver to determine the power coupling values corresponding to the transmission signals when the second path between the load impedance is turned on and the first path is turned off. The radio frequency transceiver is further configured to determine a coupling difference between the power coupling values corresponding to the transmission signals and the power coupling values corresponding to the third target power, wherein the third target power is any of the target powers; and determine a power measurement value range corresponding to the third target power according to the coupling differences corresponding to the transmission signals, the standard power increase, and the third target power. The radio frequency transceiver is further configured to calibrate the transmission power of the transmission signal according to the power measurement value range corresponding to each of the target powers.

5. The radio frequency calibration circuit of claim 4, wherein, The radio frequency transceiver is further configured to calculate a product of the coupling difference corresponding to each of the transmission signals and the standard power increase, and sum each of the products with the third target power to determine the power measurement value range corresponding to the third target power according to the multiple results obtained after the summing.

6. The radio frequency calibration circuit of any of claims 1-5, wherein, The radio frequency calibration circuit further comprises a duplexer and a filter, the duplexer is connected with the radio frequency transceiver and the coupler respectively, and the filter is connected with the radio frequency transceiver and the coupler respectively. The radio frequency transceiver is further configured to transmit transmission signals with different transmission powers to the duplexer if the radio frequency calibration circuit is in a time division duplex mode, and transmit transmission signals with different transmission powers to the filter if the radio frequency calibration circuit is in a frequency division duplex mode. The duplexer is configured to isolate a transmission channel and a reception channel in the time division duplex mode to isolate transmission signals and reception signals in the radio frequency signals when the radio frequency calibration circuit is in the time division duplex mode. The filter is configured to isolate a transmission path and a reception path in the frequency division duplex mode to isolate transmission signals and reception signals in the radio frequency signals when the radio frequency calibration circuit is in the frequency division duplex mode.

7. The radio frequency calibration circuit of any of claims 1-5, wherein, The radio frequency calibration circuit further comprises a radio frequency power amplifier, and the radio frequency power amplifier is connected with the radio frequency transceiver and the coupler respectively. The radio frequency power amplifier is configured to amplify power of each of the transmission signals transmitted by the radio frequency transceiver to obtain the transmission signals with different transmission powers, and transmit the transmission signals with different transmission powers to the coupler.

8. An electronic device, comprising: The electronic device comprises a radio frequency circuit and a radio frequency testing device, and the radio frequency circuit and the radio frequency testing device constitute the radio frequency calibration circuit as claimed in any one of claims 1 to 7.

9. A radio frequency calibration method, characterized by, The method is applied to a radio frequency calibration circuit comprising a radio frequency transceiver, a coupler, a radio frequency testing device, a load impedance and a switching device, and the method comprises the following steps: When the first path between the radio frequency testing device and the coupler is turned on by the switching device, the radio frequency testing device measures power of a plurality of transmission signals transmitted by the radio frequency transceiver to determine a power measurement value corresponding to each of the transmission signals, selects a target transmission signal with a target power from the plurality of transmission signals, and determines a transmission power corresponding to the target transmission signal; After the radio frequency testing device determines the transmission power corresponding to the target transmission signal, the second path between the coupler and the load impedance is turned on by the switching device, and the first path is turned off, and the coupler determines a power coupling value corresponding to the target transmission signal; The radio frequency transceiver determines a power corresponding relationship according to the transmission power corresponding to the target transmission signal, the target power and the corresponding power coupling value, and calibrates the transmission power of the transmission signal according to the power corresponding relationship.

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