Power amplifier circuit and radio frequency circuit, electronic device, adjustment method

Abstract

The application discloses a power amplifier circuit, and belongs to the field of integrated circuits, which comprises a first power amplifier, a second power amplifier and a first adjustable phase module, the input end of the first power amplifier is connected with the first output end of a radio frequency transceiver, the first input end of the first adjustable phase module is connected with the third output end of the radio frequency transceiver, the output end of the first power amplifier is connected with the second input end of the first adjustable phase module, and the output end of the first adjustable phase module is connected with the output end of the power amplifier circuit; the input end of the second power amplifier is connected with the second output end of the radio frequency transceiver, and the output end of the second power amplifier is connected with the output end of the power amplifier circuit.

Description

Technical Field

[0001] This application belongs to the field of integrated circuits, specifically relating to a power amplifier circuit, a radio frequency circuit, electronic equipment, and a radio frequency signal adjustment method. Background Technology

[0002] For the radio frequency signals emitted by the radio frequency transceiver, the current method usually uses a power divider to split them into two radio frequency signals, which are then input into the corresponding power amplifiers. The phase of the two radio frequency signals is adjusted by combining a λ / 4 transmission line, thereby realizing the transformation of the target impedance under broadband.

[0003] However, since λ / 4 transmission lines are implemented using fixed-length microstrip lines, if the operating bandwidth of the power amplifier increases, accurate impedance reversal cannot be achieved, significantly reducing the power amplifier's efficiency. Furthermore, the power dividers used at the inputs of the two power amplifiers typically have a fixed power distribution ratio, which also affects the power amplifier's efficiency. Summary of the Invention

[0004] The purpose of this application is to provide a power amplifier circuit that can solve the problem of low impedance transformation accuracy of power amplifiers under wide bandwidth variations.

[0005] In a first aspect, embodiments of this application provide a power amplifier circuit, including a first power amplifier, a second power amplifier, and a first adjustable phase module.

[0006] The input terminal of the first power amplifier is connected to the first output terminal of the radio frequency transceiver, the first input terminal of the first adjustable phase module is connected to the third output terminal of the radio frequency transceiver, the output terminal of the first power amplifier is connected to the second input terminal of the first adjustable phase module, and the output terminal of the first adjustable phase module is connected to the output terminal of the power amplifier circuit.

[0007] The input terminal of the second power amplifier is connected to the second output terminal of the radio frequency transceiver, and the output terminal of the second power amplifier is connected to the output terminal of the power amplifier circuit.

[0008] Secondly, embodiments of this application provide a radio frequency circuit, including a radio frequency transceiver, a power supply module, a network signal module, and an antenna module, wherein the network signal module includes the power amplifier circuit according to the first aspect.

[0009] The input terminal of the first power amplifier is connected to the first output terminal of the RF transceiver, the input terminal of the second power amplifier is connected to the second output terminal of the RF transceiver, the output terminal of the power amplifier circuit is connected to the antenna module, and the power supply module is connected to the power amplifier circuit.

[0010] Thirdly, embodiments of this application provide an electronic device, including a power amplifier circuit according to the first aspect, or a radio frequency circuit according to the second aspect.

[0011] Fourthly, embodiments of this application provide a radio frequency signal adjustment method applied to a power amplifier circuit according to the first aspect, the method comprising:

[0012] The control voltage signal is determined based on the current frequency of the target radio frequency signal transmitted by the radio frequency transceiver;

[0013] The radio frequency transceiver is controlled to output the control voltage signal to the first adjustable phase module, so as to control the first adjustable phase module to adjust the phase of the first radio frequency signal output by the first power amplifier.

[0014] In this embodiment, the power amplifier circuit includes a first power amplifier, a second power amplifier, and a first adjustable phase module. The input terminal of the first power amplifier is connected to the first output terminal of the RF transceiver, the first input terminal of the first adjustable phase module is connected to the third output terminal of the RF transceiver, the output terminal of the first power amplifier is connected to the second input terminal of the first adjustable phase module, and the output terminal of the first adjustable phase module is connected to the output terminal of the power amplifier circuit. The input terminal of the second power amplifier is connected to the second output terminal of the RF transceiver, and the output terminal of the second power amplifier is connected to the output terminal of the power amplifier circuit. Thus, by variably adjusting the phase of the RF signal output by the first power amplifier, precise impedance inversion can be achieved over a wider operating bandwidth range when the operating bandwidth of the power amplifier circuit is increased, ensuring that the power amplifier circuit operates in a high-efficiency state, thereby significantly improving the operating efficiency of the power amplifier circuit. Attached Figure Description

[0015] Figure 1 This is a block diagram of the power amplifier circuit according to an embodiment of this application.

[0016] Figure 2A , Figure 2B , Figure 2C These are circuit structure diagrams of the phase-adjustable λ / 4 microstrip line according to embodiments of this application.

[0017] Figure 3 This is a circuit diagram of a power amplifier circuit according to a specific embodiment of this application.

[0018] Figure 4 This is a structural block diagram of the radio frequency circuit according to an embodiment of this application.

[0019] Figure 5 This is a circuit structure diagram of a radio frequency circuit according to a specific embodiment of this application.

[0020] Figure 6 This is a flowchart of a radio frequency signal adjustment method according to an embodiment of this application.

[0021] Figure 7 This is a flowchart of a radio frequency signal adjustment method according to a specific embodiment of this application.

[0022] Figure 8 This is a schematic diagram of the optimal phase difference compensation scanning process in an embodiment of this application.

[0023] Figure 9 This is a schematic diagram of the optimal power allocation ratio scanning process in an embodiment of this application.

[0024] Figure 10 The structural block diagram of the radio frequency signal adjustment device in the embodiments of this application is shown.

[0025] Figure 11 The structural block diagram of the electronic device to implement the embodiments of this application is shown.

[0026] Figure 12 This is a schematic diagram of the hardware structure of an electronic device that implements an embodiment of this application. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0028] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0029] The power amplifier circuit, radio frequency circuit, electronic device, and radio frequency signal adjustment method provided in this application will be described in detail below with reference to the accompanying drawings and through specific embodiments and application scenarios.

[0030] This application provides a power amplifier circuit, including a first power amplifier, a second power amplifier, and a first adjustable phase module. The input terminal of the first power amplifier is connected to the first output terminal of an RF transceiver. The first input terminal of the first adjustable phase module is connected to the third output terminal of the RF transceiver. The output terminal of the first power amplifier is connected to the second input terminal of the first adjustable phase module, and the output terminal of the first adjustable phase module is connected to the output terminal of the power amplifier circuit. The input terminal of the second power amplifier is connected to the second output terminal of the RF transceiver, and the output terminal of the second power amplifier is connected to the output terminal of the power amplifier circuit.

[0031] Now for reference Figure 1 , Figure 1 This is a block diagram of the power amplifier circuit according to an embodiment of this application.

[0032] like Figure 1 As shown, the power amplifier circuit 100 includes a first power amplifier 10, a second power amplifier 20, and a first adjustable phase module 30.

[0033] Optionally, the first power amplifier 10 includes a carrier power amplifier, and the second power amplifier 20 includes a peak power amplifier.

[0034] The radio frequency transceiver 40 is used to transmit 4G radio frequency signals or 5G radio frequency signals. Here, the radio frequency transceiver directly divides the radio frequency signal into two paths: a first input radio frequency signal and a second input radio frequency signal, which are input to the first power amplifier 10 and the second power amplifier 20 from their respective output ports.

[0035] Currently, most mobile terminal radio frequency transceivers adopt a zero intermediate frequency architecture, which is mainly used for up-conversion and down-conversion of signals, while also having some radio frequency related control functions.

[0036] Optionally, the first adjustable phase module 30 is a phase-adjustable λ / 4 microstrip line. Optionally, the phase-adjustable λ / 4 microstrip line includes a variable capacitor diode, such as an LC circuit consisting of a variable capacitor diode and an inductor, or a circuit consisting of a variable capacitor diode and a microstrip network.

[0037] like Figure 2A and Figure 2B As shown, the phase-adjustable λ / 4 microstrip line is implemented by an LC network circuit consisting of multiple inductors L1, L2, ..., Ln and corresponding multiple variable capacitor diodes C1, C2, ..., Cn.

[0038] like Figure 2C As shown, the phase-adjustable λ / 4 microstrip line is realized by a microstrip-capacitor network circuit consisting of multiple microstrip networks 1, 2, ..., n, and corresponding multiple variable capacitor diodes C1, C2, ..., Cn.

[0039] The radio frequency transceiver 40 also outputs a control voltage signal to the first adjustable phase module 30. The control voltage signal is determined according to the current frequency of the radio frequency signal transmitted by the radio frequency transceiver 40. Thus, the first adjustable phase module 30 can adjust its capacitance change according to the received control voltage signal to delay the first radio frequency signal amplified by the first power amplifier 10, thereby realizing the phase adjustment of the first radio frequency signal.

[0040] As mentioned above, the output of the second power amplifier 20 is connected to the output of the power amplifier circuit. This connection includes both direct and indirect connections.

[0041] Figure 1 In an embodiment where the output of the second power amplifier 20 is directly connected to the output of the power amplifier circuit, the output of the second power amplifier 20 is connected to the output of the first adjustable phase module 30, which corresponds to the output of the power amplifier circuit. The first output RF signal, after the phase is adjusted by the first adjustable phase module 30, is combined with the second output RF signal amplified by the second power amplifier 20, thereby outputting the combined RF signal through the output of the power amplifier circuit.

[0042] The control voltage signal output by the RF transceiver 40 can be determined based on the current frequency of the transmitted 4G or 5G RF signal. This will be explained in detail below in conjunction with the RF signal adjustment method, and will not be repeated here.

[0043] After determining the required phase, the required time delay of the first adjustable phase module 30 can be determined, and thus the required capacitance change of the first adjustable phase module 30 can be determined. Based on the corresponding relationship between the capacitance generated by the capacitive elements of the first adjustable phase module 30 under different voltage signals, the required voltage value can be determined. The relationship between the control voltage and the variable capacitor value can be stored in the control module of the RF transceiver 40 and retrieved using a lookup table.

[0044] Therefore, the RF transceiver 40 can output a corresponding control voltage according to the phase required at the current frequency, so as to adjust and optimize the phase of the first RF signal output by the first power amplifier 10.

[0045] By variably adjusting the phase of the RF signal output by the first power amplifier, precise impedance reversal can be achieved over a wider operating bandwidth range when the operating bandwidth of the power amplifier circuit is increased, ensuring that the power amplifier circuit operates in a high-efficiency state, thereby significantly improving the operating efficiency of the power amplifier circuit.

[0046] In one embodiment, to further optimize impedance transformation under broadband conditions, the power amplifier circuit may further include a second adjustable phase module. The first input terminal of the second adjustable phase module is connected to the fourth output terminal of the RF transceiver, the second input terminal of the second adjustable phase module is connected to the output terminal of the second power amplifier and the output terminal of the first adjustable phase module, and the output terminal of the second adjustable phase module is the output terminal of the power amplifier circuit.

[0047] In this embodiment, the output terminal of the second power amplifier 20 is indirectly connected to the output terminal of the power amplifier circuit through the second adjustable phase module.

[0048] The second adjustable phase module (not shown in the figure) can adjust the phase of the phase. Figure 1 The first output RF signal output by the first adjustable phase module 30 and the second output RF signal output by the second power amplifier 20 are combined and the combined RF signal output is phase-adjusted. The adjusted RF signal is used as the final RF signal output by the power amplifier circuit 100.

[0049] Similar to the first adjustable phase module, the second adjustable phase module is a phase-adjustable λ / 4 microstrip line, which includes a variable capacitor diode.

[0050] At this time, the RF transceiver 40 also outputs a control voltage signal to the second adjustable phase module, thereby allowing the second adjustable phase module to adjust its capacitance change according to the received control voltage signal. Figure 1 The combined radio frequency signal is delayed again to achieve phase adjustment of the combined radio frequency signal.

[0051] The radio frequency transceiver 40 can output a control voltage as a fixed level signal, or it can directly output a control voltage with a variable voltage value within a wide range. Here, the variable control voltage value is the voltage magnitude required for the current phase adjustment.

[0052] When the RF transceiver outputs a fixed-level signal with a control voltage, a variable gain amplifier can be used to amplify or attenuate the fixed-level signal.

[0053] Optionally, when the power amplifier circuit includes both a first adjustable phase module and a second adjustable phase module, the power amplifier circuit may further include a first variable gain amplifier and a second variable gain amplifier. The first variable gain amplifier is disposed between the third output terminal of the RF transceiver and the first input terminal of the first adjustable phase module, and the second variable gain amplifier is disposed between the fourth output terminal of the RF transceiver and the first input terminal of the second adjustable phase module.

[0054] The first variable gain amplifier and the second variable gain amplifier amplify or attenuate the control voltage signal output by the RF transceiver and then input it to the first adjustable phase module and the second adjustable phase module respectively.

[0055] In this embodiment, after determining the phase corresponding to the current frequency, the RF transceiver outputs a control voltage of a fixed-level signal, which is input to the first variable gain amplifier and the second variable gain amplifier respectively. The corresponding variable gain amplifier amplifies or attenuates the fixed-level signal according to the required control voltage value, so that the control voltage can fluctuate within a wide range, thereby realizing the variable adjustment of the phase under the condition of increased bandwidth.

[0056] Of course, if the power amplifier circuit only includes the first adjustable phase module, the power amplifier circuit may only include the first variable gain amplifier.

[0057] Now for reference Figure 3 , Figure 3 This is a circuit diagram of a power amplifier circuit according to a specific embodiment of this application.

[0058] In this embodiment, the RF transceiver is a WTR, the first power amplifier is a carrier power amplifier, the second power amplifier is a peak power amplifier, and the first input RF signal is RF. in1 The first input radio frequency signal is RF in2 The first adjustable phase module is a λ / 4 broadband adjustable phase-shifting network 32, the second adjustable phase module is a λ / 4 broadband adjustable phase-shifting network 34, the first variable gain amplifier is a PGA 72, and the second variable gain amplifier is a PGA 74. The working principle of each component of the power amplifier circuit in this embodiment is as described above and will not be repeated here.

[0059] In this embodiment, the power amplifier circuit includes a first power amplifier, a second power amplifier, and a first adjustable phase module. The input terminal of the first power amplifier is connected to the first output terminal of the RF transceiver, the first input terminal of the first adjustable phase module is connected to the third output terminal of the RF transceiver, the output terminal of the first power amplifier is connected to the second input terminal of the first adjustable phase module, and the output terminal of the first adjustable phase module is connected to the output terminal of the power amplifier circuit. The input terminal of the second power amplifier is connected to the second output terminal of the RF transceiver, and the output terminal of the second power amplifier is connected to the output terminal of the power amplifier circuit. Thus, by variably adjusting the phase of the RF signal output by the first power amplifier, precise impedance inversion can be achieved over a wider operating bandwidth range when the operating bandwidth of the power amplifier circuit is increased, ensuring that the power amplifier circuit operates in a high-efficiency state, thereby significantly improving the operating efficiency of the power amplifier circuit.

[0060] In another embodiment of this application, a radio frequency circuit is also provided, including a radio frequency transceiver, a power supply module, a network signal module, and an antenna module, wherein the network signal module includes... Figures 1 to 3 In the power amplifier circuit described in the embodiment, the input terminal of the first power amplifier is connected to the first output terminal of the RF transceiver, the input terminal of the second power amplifier is connected to the second output terminal of the RF transceiver, the output terminal of the power amplifier circuit is connected to the antenna module, and the power supply module is connected to the power amplifier circuit.

[0061] refer to Figure 4 , Figure 4 This is a structural block diagram of the radio frequency circuit according to an embodiment of this application.

[0062] like Figure 4 As shown, the radio frequency circuit includes a radio frequency transceiver 40, a power supply module 50, a network signal module 200, and an antenna module 60. The network signal module 200 includes the aforementioned power amplifier circuit 100. The power amplifier circuit 100 adjusts the output of the combined radio frequency signal, which is then processed by other components of the network signal module 200 before being transmitted to the antenna module 60.

[0063] The radio frequency transceiver 40 divides the transmitted target radio frequency signal, 4G radio frequency signal or 5G radio frequency signal into a first input radio frequency signal and a second input radio frequency signal, and then outputs them to the first power amplifier 10 and the second power amplifier 20 respectively.

[0064] In one embodiment, the phases of the first and second input RF signals output by the RF transceiver 40 can be adjusted based on the operating efficiency of the power amplifier circuit and the current transmission frequency of the target RF signal. The phase adjustment of the two input RF signals will be explained in detail below in conjunction with the RF signal adjustment method, and will not be repeated here.

[0065] The network signal module 200 can be a 4G module or a 5G New Radio (NR) module, corresponding to the type of radio frequency signal output by the radio frequency transceiver 40.

[0066] The power module 50 is used to provide power to the network signal module 200. The power module 50 can be an envelope tracking (ET) power chip or an average power tracking (APT) power chip.

[0067] Optionally, the power module is an APT power chip. Compared with ET chips, APT chips have lower cost and lower power consumption.

[0068] Figure 5 This is a circuit structure diagram of a radio frequency circuit according to a specific embodiment of this application, as shown below. Figure 5 As shown, the radio frequency circuit includes two different types of network signal modules: 4G module U1 and 5G NR module U2, which respectively include... Figure 3 The power amplifier circuit 100 shown is used to amplify the radio frequency signal transmitted by the WTR.

[0069] In this embodiment, the WTR splits the radio frequency signal into two 4G input signals RF. in1 and RF in2 This signal is then input to the carrier power amplifier and peak power amplifier in the 4G module U1. Simultaneously, the WTR splits the RF signal into two 5G input signals. in1 and RF in2 The corresponding inputs are then fed into the carrier power amplifier and peak power amplifier in the 5G module U1.

[0070] Of course, in other embodiments, the radio frequency circuit may include only one of the 4G module U1 and the 5G NR module U2.

[0071] APT power chip 1 is used to power the 4G module U1, and APT power chip 2 is used to power the 5G NR module U2.

[0072] like Figure 5 As shown, in addition to the power amplifier circuit, the 4G module U1 and the 5G NR module U2 also include switches for frequency band selection or TDD Tx / Rx path switching; duplexers for FDD Tx / Rx frequency separation and out-of-band signal suppression; filters for TDD out-of-band signal suppression; and directional couplers for power detection and standing wave detection, etc.

[0073] Antennas ANT1 and ANT2 are used for transmitting and receiving radio frequency signals, which is equivalent to achieving impedance transformation or energy conversion between the conducted impedance and the air dielectric wave impedance.

[0074] In yet another embodiment of this application, an electronic device is also provided, comprising the above-described... Figures 1 to 3 The power amplifier circuit described in the embodiments, or including the above... Figures 4 to 5 The radio frequency circuit described in the embodiment.

[0075] The electronic device in this application embodiment can be a terminal, or it can be any other device besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, handheld computer, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc., and can also be a personal computer (PC), etc. This application embodiment does not specifically limit the scope.

[0076] In another embodiment of this application, a radio frequency signal adjustment method is also provided, applied to the above-mentioned... Figures 1 to 5 The power amplifier circuit involved in the embodiments.

[0077] like Figure 6 As shown, the method includes:

[0078] Step 102: Determine the control voltage signal based on the current frequency of the target radio frequency signal transmitted by the radio frequency transceiver;

[0079] Step 104: Control the radio frequency transceiver to output the control voltage signal to the first adjustable phase module, so as to control the first adjustable phase module to adjust the phase of the first radio frequency signal output by the first power amplifier.

[0080] In step 102, optionally, a control voltage signal is determined based on the current frequency of the target radio frequency signal transmitted by the radio frequency transceiver, including:

[0081] The phase value of the target radio frequency signal at a preset frequency is obtained as a reference value.

[0082] Based on the preset frequency and the reference value, determine the required phase value of the current frequency of the target radio frequency signal;

[0083] The voltage value corresponding to the required phase value is determined based on the preset mapping relationship between different phase values ​​and voltage values.

[0084] The control voltage signal is determined based on the voltage value.

[0085] Specific embodiments of the radio frequency signal adjustment method can be combined with Figure 7 To explain, Figure 7This is a flowchart of a radio frequency signal adjustment method according to a specific embodiment of this application.

[0086] Optionally, when the first adjustable phase module includes a variable capacitor diode, the phase value corresponds to the capacitance value of the variable capacitor diode, and the preset mapping relationship is determined based on the capacitance-voltage relationship of the variable capacitor diode itself.

[0087] like Figure 7 As shown, it includes the following steps:

[0088] S01: After entering the initial normal operation state, the RF transceiver reads the reference value C0@f0. This value is the capacitance value corresponding to the λ / 4 broadband adjustable phase shifting network shifting the phase by 90° when the RF signal frequency is f0. It serves as the reference for phase adjustment of RF signals of different frequencies.

[0089] S02: Obtain the frequency fx of the current carrier (radio frequency signal);

[0090] S03: Determine whether the current carrier frequency fx has changed. If it has not changed, proceed to S08; if it has changed, proceed to S04.

[0091] S04: Calculate the target capacitance value Cx corresponding to a 90° phase shift at this frequency fx. The specific calculation formula is Cx=f0 / fx*C0;

[0092] S05: Determine whether the difference between the target capacitance value Cx and the capacitance value Cy after the last adjustment is greater than ΔC. This is mainly used to prevent inefficient repeated switching when the frequency deviation is small. Here, the value of ΔC is greater than the minimum adjustment accuracy of the capacitor. If the change is greater than ΔC, proceed to S06 for adjustment.

[0093] S06: Read the lookup table pre-stored in the control module of the RF transceiver to determine the control voltage corresponding to the target capacitance value Cx;

[0094] S07: Output relevant control voltage to control the λ / 4 broadband adjustable phase-shifting network;

[0095] S08: Keep the current phase unchanged and do not make any adjustments.

[0096] Therefore, a control voltage signal determined based on the current frequency of the RF signal can be output from the RF transceiver to the corresponding adjustable phase module of the carrier power amplifier to adjust the phase of one RF signal input from the RF transceiver to the amplified RF signal of the carrier power amplifier. By employing variable phase adjustment, precise impedance reversal can be achieved over a wider operating bandwidth, even with an increased operating bandwidth of the power amplifier circuit, ensuring that the power amplifier circuit operates at high efficiency.

[0097] Optionally, before determining the control voltage signal based on the current frequency of the target radio frequency signal transmitted by the radio frequency transceiver, the method further includes: splitting the target radio frequency signal into a first input radio frequency signal and a second input radio frequency signal; determining the phase difference between the first input radio frequency signal and the second input radio frequency signal based on the current frequency of the target radio frequency signal; and inputting the first input radio frequency signal and the second input radio frequency signal having the phase difference to the first power amplifier and the second power amplifier respectively.

[0098] In one embodiment, determining the phase difference between the first input radio frequency signal and the second input radio frequency signal based on the current frequency of the target radio frequency signal includes:

[0099] Based on the preset phase mapping relationship between different frequencies and phase difference compensation values, the target phase difference compensation value corresponding to the current frequency is determined. The preset phase mapping relationship is determined based on the phase difference between the first power amplifier and the second power amplifier when the power amplifier circuit reaches its maximum total output power at different frequencies and phases.

[0100] The phase difference between the first input RF signal and the second input RF signal is determined based on the target phase difference compensation value.

[0101] The preset phase mapping relationship can be obtained through experimental measurement. It is based on the phase difference of the RF signals output by the first and second power amplifiers after being combined at various frequencies, which may reach the maximum total output power. In other words, the preset phase mapping relationship represents the optimal phase difference compensation value for the two input RF signals output by the RF transceiver at different frequencies, enabling the power amplifier to achieve high-efficiency operation.

[0102] Figure 8 A schematic diagram of the optimal phase difference compensation scanning process according to an embodiment of this application is provided, as follows: Figure 8 As shown, it includes the following steps:

[0103] S01: Pre-load the two input RF signals of the first and second power amplifiers. in1 and RF in2 The power allocation is set to 1:1, meaning that initially it can be allocated in a 3dB equal power manner, and the total power of the input RF signal is set so that both power amplifiers are in working state.

[0104] S02: The frequency scanning method is given: fn=f0+(n-1)*Δf, where f0 is the initial frequency, Δf is the scanning frequency interval, and the initial n=1;

[0105] S03: The method for phase scanning at any given frequency point fn is given: θk=θ0+(k-1)*Δθ, where θ0 is the initial phase and Δθ is the scanning phase interval;

[0106] S04: At a given frequency point fn, iterate through all k values ​​to iterate through all phase values, and simultaneously test the power P at the corresponding phase. k ;

[0107] S05: Obtain the phase difference compensation value βn corresponding to the maximum output power Pnmax at the current frequency point fn;

[0108] S06: Determine whether the phase difference compensation values ​​for all frequency points have been obtained. If they have been obtained, proceed to S08; otherwise, proceed to S07.

[0109] S07: Perform a scan of the phase compensation value for the next frequency point f(n+1) until the process is completed;

[0110] S08: The scan ends. The optimal phase difference compensation value βn at different frequency points fn is obtained, and the obtained results are stored in the control module in the form of a lookup table.

[0111] By performing cyclic scanning at different frequencies, the optimal phase difference compensation value βn corresponding to all frequencies fn can be obtained.

[0112] By adjusting the phase difference between the first input RF signal to the first power amplifier and the second input RF signal to the second power amplifier to the optimal phase difference compensation value corresponding to the current frequency, the combined RF signal amplified by the power amplifier can reach the maximum total output power, thereby enabling the entire power amplifier circuit to achieve a high-efficiency operating state.

[0113] In addition to adjusting and optimizing the phase of the two RF signals input from the RF transceiver to the power amplifier, the amplitude of the RF signals can also be adjusted according to the power distribution between the two RF signals.

[0114] Figure 8 The process of phase compensation at the input of a two-channel power amplifier is described. To reduce the complexity of compensation, phase compensation can be performed first, followed by amplitude compensation.

[0115] Optionally, after determining the phase difference between the first input radio frequency signal and the second input radio frequency signal, the method further includes:

[0116] The target power allocation ratio corresponding to the current frequency is determined according to the preset amplitude mapping relationship between different frequencies and power allocation ratios. The preset amplitude mapping relationship is determined according to the power allocation ratio between the first power amplifier and the second power amplifier when the power amplifier circuit reaches the maximum total output power under the phase difference compensation value corresponding to different frequencies.

[0117] The amplitudes of the first input radio frequency signal and the second input radio frequency signal are adjusted according to the total transmission power of the target radio frequency signal and the target power allocation ratio.

[0118] The preset amplitude mapping relationship can be obtained through experimental measurement. It is determined based on the power allocation ratio when the RF signals output by the combined first and second power amplifiers at various frequencies can reach the maximum total output power. In other words, this preset amplitude mapping relationship represents the optimal power allocation ratio at different frequencies, where the two input RF signals output by the RF transceiver are at the same input power, allowing the power amplifiers to operate at high efficiency. By adjusting the power allocation ratio, the total power of the input RF signals can be adjusted to correspond to the amplitudes of the first and second input RF signals.

[0119] Figure 9 A schematic diagram of the power allocation ratio scanning process according to an embodiment of this application is provided, as follows: Figure 9 As shown, it includes the following steps:

[0120] S01: The frequency scanning method is given: select frequency point fn = f0 + (n-1) * Δf, where f0 is the initial frequency point, Δf is the scanning frequency interval, and the initial n = 1;

[0121] S02: Convert the two input RF signals from the first and second power amplifiers. in1 and RF in2 The power allocation is set to 1:(a+k*b), with initial k=1 and a and b being constants;

[0122] S03: Set the input radio frequency signal RF in1 and RF in2 The phase difference between them is the optimal phase difference compensation value βn determined in the manner described above;

[0123] S04: At a given frequency point fn, iterate through all k values ​​to iterate through all phase values, and simultaneously test the power P at the corresponding phase. k ;

[0124] S05: Obtain the power allocation ratio γn corresponding to the maximum output power Pnmax at the current frequency point fn;

[0125] S06: Determine whether all frequency points have been scanned and obtain the corresponding power allocation ratio. If it has been completed, proceed to S08; if not, proceed to S07.

[0126] S07: Perform a scan of the power allocation ratio for the next frequency point f(n+1) until the scan is completed;

[0127] S08: The scan ends. The optimal power allocation ratio γn at different frequency points fn is obtained, and the results are stored in the control module in the form of a lookup table.

[0128] By performing cyclic scanning of the power allocation ratio at different frequencies, the power allocation ratio γn corresponding to all frequencies fn can be obtained.

[0129] By adjusting the power distribution ratio between the first input RF signal to the first power amplifier and the second input RF signal to the second power amplifier to the optimal power distribution ratio corresponding to the current frequency, the amplitude of the two input RF signals can be adjusted, so that the combined RF signal amplified by the power amplifier can reach the maximum total output power, thereby enabling the entire power amplifier circuit to achieve a high-efficiency operating state.

[0130] The radio frequency (RF) signal adjustment method provided in this application can be executed by an RF signal adjustment device. This application uses an RF signal adjustment device to illustrate the RF signal adjustment method as an example.

[0131] Optionally, in one embodiment, the radio frequency signal adjustment device is applied to the above-mentioned Figures 1 to 9 The power amplifier circuit involved in the embodiment.

[0132] Figure 10 To realize the structural block diagram of the radio frequency signal adjustment device in the embodiments of this application, as follows: Figure 10 As shown, the device 800 includes:

[0133] The determining module 820 is used to determine the control voltage signal based on the current frequency of the target radio frequency signal transmitted by the radio frequency transceiver;

[0134] The control module 840 is used to control the radio frequency transceiver to output the control voltage signal to the first adjustable phase module, so as to control the first adjustable phase module to adjust the phase of the first radio frequency signal output by the first power amplifier.

[0135] Optionally, module 820 is defined, specifically for:

[0136] The phase value of the target radio frequency signal at a preset frequency is obtained as a reference value.

[0137] Based on the preset frequency and the reference value, determine the required phase value of the current frequency of the target radio frequency signal;

[0138] The voltage value corresponding to the required phase value is determined based on the preset mapping relationship between different phase values ​​and voltage values.

[0139] The control voltage signal is determined based on the voltage value.

[0140] Optionally, the device 800 further includes:

[0141] The splitting module is used to split the target radio frequency signal into a first input radio frequency signal and a second input radio frequency signal before determining the control voltage signal based on the current frequency of the target radio frequency signal transmitted by the radio frequency transceiver.

[0142] A phase difference determination module is used to determine the phase difference between the first input radio frequency signal and the second input radio frequency signal based on the current frequency of the target radio frequency signal;

[0143] The input module is used to input the first input RF signal and the second input RF signal with the phase difference to the first power amplifier and the second power amplifier respectively.

[0144] Optionally, the phase difference determination module is specifically used for:

[0145] Based on the preset phase mapping relationship between different frequencies and phase difference compensation values, the target phase difference compensation value corresponding to the current frequency is determined. The preset phase mapping relationship is determined based on the phase difference between the first power amplifier and the second power amplifier when the power amplifier circuit reaches its maximum total output power at different frequencies and phases.

[0146] The phase difference between the first input RF signal and the second input RF signal is determined based on the target phase difference compensation value.

[0147] Optionally, the device 800 further includes:

[0148] The power allocation ratio module is used to determine the target power allocation ratio corresponding to the current frequency after determining the phase difference between the first input RF signal and the second input RF signal, based on a preset amplitude mapping relationship between different frequencies and power allocation ratios. The preset amplitude mapping relationship is determined based on the power allocation ratio between the first power amplifier and the second power amplifier when the power amplifier circuit reaches its maximum total output power under the phase difference compensation value corresponding to different frequencies.

[0149] An adjustment module is used to adjust the amplitude of the first input radio frequency signal and the amplitude of the second input radio frequency signal according to the total transmission power of the target radio frequency signal and the target power allocation ratio.

[0150] Therefore, a control voltage signal determined based on the current frequency of the RF signal can be output from the RF transceiver to the corresponding adjustable phase module of the carrier power amplifier to adjust the phase of one RF signal input from the RF transceiver to the amplified RF signal of the carrier power amplifier. By employing variable phase adjustment, precise impedance reversal can be achieved over a wider operating bandwidth, even with an increased operating bandwidth of the power amplifier circuit, ensuring that the power amplifier circuit operates at high efficiency.

[0151] The radio frequency signal adjustment device in this application embodiment can be an electronic device or a component within an electronic device, such as an integrated circuit or a chip. The electronic device can be a terminal or other devices besides a terminal. For example, the electronic device can be a mobile phone, tablet computer, laptop computer, PDA, in-vehicle electronic device, mobile internet device (MID), augmented reality (AR) / virtual reality (VR) device, robot, wearable device, ultra-mobile personal computer (UMPC), netbook, or personal digital assistant (PDA), etc., and can also be a personal computer (PC), etc. This application embodiment does not specifically limit the specific device.

[0152] The radio frequency signal adjustment device in this application embodiment can be a device with an operating system. This operating system can be Android, iOS, or other possible operating systems; this application embodiment does not specifically limit the specific operating system used.

[0153] The radio frequency signal adjustment device provided in this application embodiment can achieve... Figures 6 to 9 The various processes implemented in the method implementation examples will not be described again here to avoid repetition.

[0154] Optional, such as Figure 11 As shown, this application embodiment also provides an electronic device 900, including a processor 940 and a memory 920. The memory 920 stores a program or instructions that can run on the processor 940. When the program or instructions are executed by the processor 940, they implement the various steps of the above-described radio frequency signal adjustment method embodiment and can achieve the same technical effect. To avoid repetition, they will not be described again here.

[0155] It should be noted that the electronic devices in the embodiments of this application include the aforementioned mobile electronic devices and non-mobile electronic devices. Figure 12 A schematic diagram of the hardware structure of an electronic device to implement an embodiment of this application.

[0156] The electronic device 1000 includes, but is not limited to, components such as: radio frequency unit 1001, network module 1002, audio output unit 1003, input unit 1004, sensor 1005, display unit 1006, user input unit 1007, interface unit 1008, memory 1009, and processor 1010.

[0157] Interface unit 1008 can correspond to the above Figures 1 to 5 The power amplifier circuit involved in any embodiment can achieve the same technical effect, and will not be described again here to avoid repetition.

[0158] The processor 1010 is configured to determine a control voltage signal based on the current frequency of the target radio frequency signal transmitted by the radio frequency transceiver;

[0159] The radio frequency transceiver is controlled to output the control voltage signal to the first adjustable phase module, so as to control the first adjustable phase module to adjust the phase of the first radio frequency signal output by the first power amplifier.

[0160] Optionally, the processor 1010 is specifically used for:

[0161] The phase value of the target radio frequency signal at a preset frequency is obtained as a reference value.

[0162] Based on the preset frequency and the reference value, determine the required phase value of the current frequency of the target radio frequency signal;

[0163] The voltage value corresponding to the required phase value is determined based on the preset mapping relationship between different phase values ​​and voltage values.

[0164] The control voltage signal is determined based on the voltage value.

[0165] Optionally, the processor 1010 is further configured to: before determining the control voltage signal based on the current frequency of the target radio frequency signal transmitted by the radio frequency transceiver, split the target radio frequency signal into a first input radio frequency signal and a second input radio frequency signal;

[0166] The phase difference between the first input radio frequency signal and the second input radio frequency signal is determined based on the current frequency of the target radio frequency signal;

[0167] The first input RF signal and the second input RF signal, which have the phase difference, are respectively input to the first power amplifier and the second power amplifier in a one-to-one correspondence.

[0168] Optionally, the processor 1010 is specifically used for:

[0169] Based on the preset phase mapping relationship between different frequencies and phase difference compensation values, the target phase difference compensation value corresponding to the current frequency is determined. The preset phase mapping relationship is determined based on the phase difference between the first power amplifier and the second power amplifier when the power amplifier circuit reaches its maximum total output power at different frequencies and phases.

[0170] The phase difference between the first input RF signal and the second input RF signal is determined based on the target phase difference compensation value.

[0171] Optionally, the processor 1010 is also used for:

[0172] After determining the phase difference between the first input RF signal and the second input RF signal, the target power allocation ratio corresponding to the current frequency is determined according to the preset amplitude mapping relationship between different frequencies and power allocation ratios. The preset amplitude mapping relationship is determined according to the power allocation ratio between the first power amplifier and the second power amplifier when the power amplifier circuit reaches the maximum total output power under the phase difference compensation value corresponding to different frequencies.

[0173] The amplitudes of the first input radio frequency signal and the second input radio frequency signal are adjusted according to the total transmission power of the target radio frequency signal and the target power allocation ratio.

[0174] Therefore, a control voltage signal determined based on the current frequency of the RF signal can be output from the RF transceiver to the corresponding adjustable phase module of the carrier power amplifier to adjust the phase of one RF signal input from the RF transceiver to the amplified RF signal of the carrier power amplifier. By employing variable phase adjustment, precise impedance reversal can be achieved over a wider operating bandwidth, even with an increased operating bandwidth of the power amplifier circuit, ensuring that the power amplifier circuit operates at high efficiency.

[0175] Those skilled in the art will understand that the electronic device 1000 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 1010 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 11 The electronic device structure shown does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0176] It should be understood that, in this embodiment, the input unit 1004 may include a graphics processing unit (GPU) 10041 and a microphone 10042. The GPU 10041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1006 may include a display panel 10061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 1007 includes a touch panel 10071 and at least one of other input devices 10072. The touch panel 10071 is also called a touch screen. The touch panel 10071 may include a touch detection device and a touch controller. Other input devices 10072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, power buttons, etc.), trackballs, mice, and joysticks, which will not be described in detail here.

[0177] The memory 1009 can be used to store software programs and various data. The memory 1009 may primarily include a first storage area for storing programs or instructions and a second storage area for storing data. The first storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1009 may include volatile memory or non-volatile memory, or both. The non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. Volatile memory can be random access memory (RAM), static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus RAM (DRRAM). The memory 1009 in this embodiment includes, but is not limited to, these and any other suitable types of memory.

[0178] The processor 1010 may include one or more processing units; optionally, the processor 1010 integrates an application processor and a modem processor, wherein the application processor mainly handles operations involving the operating system, user interface, and applications, and the modem processor mainly handles wireless communication signals, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into the processor 1010.

[0179] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0180] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a computer software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0181] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A method for adjusting radio frequency signals, characterized in that, The method is applied to a power amplifier circuit, the power amplifier circuit including a first power amplifier, a second power amplifier, and a first adjustable phase module. The input terminal of the first power amplifier is connected to a first output terminal of an RF transceiver. The first input terminal of the first adjustable phase module is connected to a third output terminal of the RF transceiver. The output terminal of the first power amplifier is connected to a second input terminal of the first adjustable phase module. The output terminal of the first adjustable phase module is connected to the output terminal of the power amplifier circuit. The input terminal of the second power amplifier is connected to a second output terminal of the RF transceiver. The output terminal of the second power amplifier is connected to the output terminal of the power amplifier circuit. The method includes: The control voltage signal is determined based on the current frequency of the target radio frequency signal transmitted by the radio frequency transceiver; The radio frequency transceiver is controlled to output the control voltage signal to the first adjustable phase module, so as to control the first adjustable phase module to adjust the phase of the first radio frequency signal output by the first power amplifier; Before determining the control voltage signal based on the current frequency of the target radio frequency signal transmitted by the radio frequency transceiver, the method further includes: splitting the target radio frequency signal into a first input radio frequency signal and a second input radio frequency signal; determining the phase difference between the first input radio frequency signal and the second input radio frequency signal based on the current frequency of the target radio frequency signal; inputting the first input radio frequency signal and the second input radio frequency signal with the phase difference to the first power amplifier and the second power amplifier respectively; determining the phase difference between the first input radio frequency signal and the second input radio frequency signal based on the current frequency of the target radio frequency signal includes: determining the target phase difference compensation value corresponding to the current frequency based on a preset phase mapping relationship between different frequencies and phase difference compensation values, wherein the preset phase mapping relationship is determined based on the phase difference between the first power amplifier and the second power amplifier when the power amplifier circuit reaches its maximum total output power at different frequencies and phases; and determining the phase difference between the first input radio frequency signal and the second input radio frequency signal based on the target phase difference compensation value.

2. The method according to claim 1, characterized in that, It also includes a second adjustable phase module. The first input terminal of the second adjustable phase module is connected to the fourth output terminal of the radio frequency transceiver, the second input terminal of the second adjustable phase module is connected to the output terminal of the second power amplifier and the output terminal of the first adjustable phase module, and the output terminal of the second adjustable phase module is the output terminal of the power amplifier circuit.

3. The method according to claim 2, characterized in that, The first adjustable phase module and the second adjustable phase module are λ / 4 microstrip lines with adjustable phase.

4. The method according to claim 3, characterized in that, The phase-tunable λ / 4 microstrip line includes a variable-capacitance diode.

5. The method according to claim 2, characterized in that, It also includes a first variable gain amplifier and a second variable gain amplifier. The first variable gain amplifier is disposed between the third output terminal of the RF transceiver and the first input terminal of the first adjustable phase module, and the second variable gain amplifier is disposed between the fourth output terminal of the RF transceiver and the first input terminal of the second adjustable phase module.

6. The method according to claim 1, characterized in that, Determining the control voltage signal based on the current frequency of the target radio frequency signal transmitted by the radio frequency transceiver includes: The phase value of the target radio frequency signal at a preset frequency is obtained as a reference value. Based on the preset frequency and the reference value, determine the required phase value of the current frequency of the target radio frequency signal; The voltage value corresponding to the required phase value is determined based on the preset mapping relationship between different phase values ​​and voltage values. The control voltage signal is determined based on the voltage value.

7. A radio frequency signal adjustment device applied to a power amplifier circuit, the power amplifier circuit including a first power amplifier, a second power amplifier, and a first adjustable phase module, wherein the input terminal of the first power amplifier is connected to a first output terminal of a radio frequency transceiver, the first input terminal of the first adjustable phase module is connected to a third output terminal of the radio frequency transceiver, the output terminal of the first power amplifier is connected to a second input terminal of the first adjustable phase module, and the output terminal of the first adjustable phase module is connected to the output terminal of the power amplifier circuit; the input terminal of the second power amplifier is connected to a second output terminal of the radio frequency transceiver, and the output terminal of the second power amplifier is connected to the output terminal of the power amplifier circuit, the device comprising: The determination module is used to determine the control voltage signal based on the current frequency of the target radio frequency signal transmitted by the radio frequency transceiver; The control module is used to control the radio frequency transceiver to output the control voltage signal to the first adjustable phase module, so as to control the first adjustable phase module to adjust the phase of the first radio frequency signal output by the first power amplifier; The splitting module is used to split the target radio frequency signal into a first input radio frequency signal and a second input radio frequency signal before determining the control voltage signal based on the current frequency of the target radio frequency signal transmitted by the radio frequency transceiver. A phase difference determination module is used to determine the phase difference between the first input radio frequency signal and the second input radio frequency signal based on the current frequency of the target radio frequency signal; The input module is used to input the first input radio frequency signal and the second input radio frequency signal with the phase difference to the first power amplifier and the second power amplifier respectively in a one-to-one correspondence. The phase difference determination module is specifically used to determine the target phase difference compensation value corresponding to the current frequency based on a preset phase mapping relationship between different frequencies and phase difference compensation values. The preset phase mapping relationship is determined based on the phase difference between the first power amplifier and the second power amplifier when the power amplifier circuit reaches its maximum total output power at different frequencies and phases. The phase difference between the first input RF signal and the second input RF signal is determined based on the target phase difference compensation value.

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