A system and method for calibrating amplitude and phase consistency in a high-power synthesis system

Abstract

This invention discloses an amplitude and phase consistency calibration system for a high-power combining system, comprising multiple transmit link modules, a power combiner, a main controller, and a host computer. It also discloses a calibration method for amplitude and phase consistency in a high-power combining system. This method sets the voltage standing wave ratio (VSWR) and reflected power of each input port as mandatory safety constraints and embeds them into the optimization algorithm. A calibration strategy is adopted that increases progressively from low power to high power, prioritizing the adjustment of the phase of the channel with the highest reflected power, and finally performing amplitude fine-tuning. This invention is applicable to the high-power radio frequency field, overcoming the major drawbacks of traditional unconstrained phase synchronization algorithms that easily lead to excessive reflected power and damage to core components in multi-channel power combining. While ensuring absolute system safety, it achieves efficient and reliable amplitude and phase calibration in high-channel, high-power combining systems, significantly improving the system's engineering feasibility and reliability.

Description

Technical Field

[0001] This invention relates to the field of high-power radio frequency, and more particularly to an amplitude and phase consistency calibration system and method in a high-power combining system. Background Technology

[0002] In fields such as electronics, communications, radar, semiconductor equipment, medical electronics, controlled nuclear fusion, and high-energy physics, multi-channel power combining technology is often used to obtain extremely high output power. Among these technologies, power combiners are widely used due to their high efficiency and high power capacity.

[0003] The core of efficient combining lies in ensuring high consistency in amplitude and phase of the input signals. In high-channel (e.g., tens to hundreds of channels) and high-power (e.g., kilowatts to megawatts) power combining systems, factors such as the discreteness of component parameters, temperature drift, and link delay differences in each transmit link can lead to inconsistencies in amplitude and phase between the RF signals input to the combiner. When some links, due to initial phase divergence, are nearly out of phase with the combining port, a large amount of reverse reflected power will be generated at the input port corresponding to the faulty link. According to the reciprocal network principle, this port is equivalent to an output port, and the power it withstands may far exceed the limits that the final stage isolator or power amplifier of that transmit link can withstand, resulting in instantaneous damage to expensive core components.

[0004] Traditional amplitude and phase consistency calibration methods rely heavily on high-precision component selection, symmetrical hardware circuit design, and static manual calibration. These methods fail to adequately consider the matching status and safety risks of the synthesizer network's internal ports, cannot adapt to dynamic changes during system operation (such as temperature drift), and are impractical for large-scale systems with hundreds or thousands of channels. While some systems have introduced numerical control capabilities based on direct digital frequency synthesizers (DDS), they typically employ simple open-loop or closed-loop algorithms (such as gradient descent and its variants) or sequential adjustment strategies. They lack closed-loop control with real-time feedback at the synthesizer ports and fail to effectively address device safety issues during calibration initiation and adjustment (such as preventing instantaneous high-power reflections).

[0005] Therefore, there is an urgent need for an amplitude and phase consistency calibration method for efficient power synthesis that ensures system safety. This method must incorporate key parameters such as the reflected power of each port as hard constraints into the optimization process. Summary of the Invention

[0006] In view of the above problems, the present invention is proposed to provide solutions that overcome or at least partially solve the above problems.

[0007] According to one aspect of the present invention, an amplitude and phase consistency calibration system and method are provided in a high-power combining system, applied to a transmitter comprising multiple transmit link modules and a power combiner, comprising: (a) Multiple transmit link modules, each module comprising: Multi-channel amplitude and phase control unit: used to generate and output the radio frequency signal of this transmission link, and independently adjust the amplitude and phase of the signal in response to control commands; Power amplification unit: used to amplify the radio frequency signal output by the multi-channel amplitude and phase control unit; Directional coupler: Located at the output end of the power amplification link, it is used to couple the output signal to obtain the forward power sampling signal and the reverse power sampling signal; Detection unit: connected to the directional coupler, used to convert the forward power sampling signal and the reverse power sampling signal into detection signals characterizing the forward power value and the reverse power value; Local control unit: used to collect the detected power signal and report it through the communication interface; (b) Power combiner: which includes a power combiner having N input ports and 1 combined output port; each transmit link port is connected to an input port through an isolator at its end; (c) Main controller: It communicates with the local control units of all transmit links; (d) Host computer: used to run the calibration algorithm program, which is connected to the main controller; receives the Pf and Pr values ​​reported by all channels, and calculates the voltage standing wave ratio of each transmission link based on the Pf and Pr values; Where Pf is the forward power and Pr is the reverse power.

[0008] Preferably, the multi-channel amplitude and phase control unit has each channel with independent frequency, phase and amplitude control registers, and accepts configuration from the local control unit via an SPI interface.

[0009] Preferably, the power amplification unit includes an RF power amplifier and an isolator.

[0010] Preferably, the host computer adopts a multi-threaded parallel processing architecture, wherein at least one thread monitors in real time whether the VSWR and Pr of all transmission links exceed the limit and triggers protection, while other threads execute the calibration algorithm; Where VSWR is the voltage standing wave ratio and Pr is the reverse power.

[0011] Preferably, the main controller is an FPGA unit that communicates with the host computer via Ethernet and with each of the local control units via optical fiber, thereby achieving high-speed, low-latency data acquisition and instruction distribution.

[0012] Secondly, a method for amplitude and phase consistency calibration in a high-power combining system includes the following steps: S1: Initialization and Safe Startup: The multi-channel amplitude and phase control unit sets the output power of all N transmit links to a safe initial value P_init, which is far below the rated power. At the same time, the phase of each link is initialized to the default value or a random value. S2: Data Acquisition and Monitoring: The host computer polls and collects the real-time forward power value Pf and reverse power value Pr of all transmission links and reports them to the host computer; calculates the VSWR of each link and determines in real time whether the safety constraints are met; if any condition is not met, the calibration process is immediately interrupted and the protection action is triggered. S3: Determine the priority adjustment link: Under the condition of meeting the safety constraints, the host computer compares the Pr values ​​of all links and identifies the link with the largest current Pr value as the priority adjustment object in this round. S4: Phase optimization iteration: For the link identified in S3, fine-tune its multi-channel amplitude and phase control unit and collect the adjusted system data; evaluate the adjustment direction: if the total output power increases after adjustment, continue fine-tuning in this direction; if it decreases, fine-tune in the opposite direction; repeat this process on the link until a local optimal phase point for the link under the current power is found. S5: Cyclic Operation and Power Rise: Repeat steps S2-S4, prioritizing the adjustment of the link with the highest current Pr in each round. After several rounds of adjustment, when the growth of the total output power tends to level off, the host computer determines that the phase consistency under the current power level has been initially optimized. At this point, under the premise of meeting safety constraints, the amplitude setting value of the multi-channel amplitude and phase control unit of all links is synchronously and slightly increased, so that Pf of each channel increases by a fixed step size. S6: Iterate to rated power: Repeat steps S2-S5, and perform a new round of phase optimization iteration after each power ramp-up; until the Pf of all channels reaches the rated operating power and the total output power reaches or approaches the target value; S7: Amplitude Consistency Fine-tuning: Under rated power, keep the phase of each channel unchanged, and fine-tune the amplitude of the multi-channel amplitude and phase control unit of each link according to the difference of Pf value detected by each channel, so that the Pf of all links is consistent. S8: Real-time monitoring: Records the amplitude and phase parameters of the multi-channel amplitude and phase control unit of each link as the operating point; when the system enters normal operation monitoring state, the calibration process can be retried periodically or according to the performance degradation. S9: Calibration Completion and Safety Protection: Throughout the calibration process and during the system's steady-state operation, the constraint condition judgment in step S2 is continuously executed; if any link violates the constraint condition, the protection mechanism is immediately triggered to reduce or shut down the RF output.

[0013] Preferably, the safety constraint is as follows: For each input port i, where i = 1, 2, ..., N, its forward incident power Pf_i and backward reflected power Pr_i are monitored in real time, and the following conditions are simultaneously met: 1) Port voltage standing wave ratio VSWR_i ≤ M, where M is a preset safety threshold with a value ≤ 2; 2) The reflected power Pr_i ≤ P_safe, where P_safe is the rated withstand power of the power load of the final stage isolator.

[0014] Preferably, in step S3, the Pr_i of all ports are compared in real time using a multi-threaded or fast scanning algorithm to dynamically determine the link to be adjusted with the highest priority.

[0015] Preferably, in step S4, the phase optimization algorithm adopts an optimization algorithm based on gradient estimation or direct search, the objective function of which is the synthesized output port power, and a constraint condition check is performed after each adjustment, and the adjustment direction that violates the constraint is regarded as invalid.

[0016] This invention overcomes the major defects of traditional unconstrained phase synchronization algorithms in multi-channel power combining, which can easily lead to excessive reflected power and damage to core components. Under the premise of ensuring absolute system safety, it achieves efficient and reliable calibration of amplitude and phase in high-channel, high-power combining systems, significantly improving the engineering feasibility and reliability of the system.

[0017] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is an architectural block diagram of a high-power power combining system provided in an embodiment of the present invention; Figure 2 The overall flowchart of the amplitude and phase consistency calibration method provided in the embodiments of the present invention is shown. Detailed Implementation

[0020] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0021] The terms "comprising" and "having," and any variations thereof, in the specification, embodiments, claims, and drawings of this invention are intended to cover non-exclusive inclusion, such as including a series of steps or units.

[0022] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] Example 1: An amplitude and phase consistency calibration system for a high-power combining system, applied to a transmitter containing multiple transmit link modules and a power combiner, such as... Figure 1 As shown, the system includes: (1) Multiple transmit link modules, each module including: Multi-channel amplitude and phase control unit: used to generate and output the radio frequency signal of this transmit link, and independently adjust the amplitude and phase of the signal in response to control commands.

[0024] Power amplifier unit: used to amplify the radio frequency signal output by the multi-channel amplitude and phase control unit.

[0025] Directional coupler: Located at the output of the power amplifier link, it is used to couple the output signal to obtain the forward power (Pf) sampled signal and the reverse power (Pr) sampled signal.

[0026] Detection unit: Connected to the directional coupler, used to convert the forward power sampling signal and the reverse power sampling signal into detection signals that characterize the forward power value and the reverse power value.

[0027] Local Control Unit (MCU): Used to acquire and detect power signals and report them through the communication interface.

[0028] (2) Power combiner: The power combiner consists of N transmit link ports and one output port. Each transmit link is connected to an input port through an isolator at its end.

[0029] (3) Main controller: communicates with the local control unit of all transmit link modules.

[0030] (4) Host computer: runs the calibration algorithm program and communicates with the main controller; receives the Pf and Pr values ​​reported by all channels, and calculates the voltage standing wave ratio (VSWR) of each transmission link based on Pf and Pr.

[0031] Furthermore, the multi-channel amplitude and phase control unit, each channel of which has independent frequency, phase, and amplitude control registers, accepts configuration from the local control unit (MCU) via an SPI interface.

[0032] Furthermore, the power amplification unit includes an RF power amplifier and an isolator.

[0033] Furthermore, the host computer adopts a multi-threaded parallel processing architecture, in which at least one thread monitors in real time whether the VSWR and Pr of all transmission links exceed the limits and triggers protection, while other threads execute calibration algorithms.

[0034] Furthermore, the main controller is an FPGA unit that communicates with the host computer via Ethernet and with each local control unit (MCU) via optical fiber to achieve high-speed, low-latency data acquisition and command distribution.

[0035] Example 2: An amplitude and phase consistency calibration method for a high-power combining system aims to maximize the total output power of the power combiner. Under preset safety constraints, iteratively generates and issues amplitude and phase adjustment commands to the multi-channel amplitude and phase control units of each transmit link. The safety constraints are: for each input port i (i=1, 2,..., N), its forward incident power Pf_i and backward reflected power Pr_i are monitored in real time, ensuring that the following conditions are met simultaneously: 1) Port voltage standing wave ratio VSWR_i ≤ M (M is a preset safety threshold, preferably ≤2); 2) Reflected power Pr_i ≤ P_safe (P_safe is the rated withstand power of the final stage isolator power load).

[0036] like Figure 2 As shown, the method includes the following steps: S1 - Initialization and Safe Startup: The multi-channel amplitude and phase control unit sets the output power of all N transmit links to a safe initial value P_init (e.g., 1W) that is far below the rated power, and initializes the phase of each link to the default value or a random value. S2 - Data Acquisition and Monitoring: The host computer polls and collects the real-time forward power value Pf and reverse power value Pr of all transmit links, and reports them to the host computer. The VSWR of each link is calculated, and it is determined in real time whether the safety constraints (VSWR_i ≤ M and Pr_i ≤ P_safe) are met. If any condition is not met, the calibration process is immediately interrupted, triggering a protection action.

[0037] S3 - Determine the priority adjustment link: Under the condition of meeting the safety constraints, the host computer compares the Pr values ​​of all links and identifies the link with the largest current Pr value as the priority adjustment target for this round.

[0038] S4 - Phase Optimization Iteration: For the link identified in S3, fine-tune its multi-channel amplitude and phase control unit (e.g., increase or decrease by a minimum step) and collect the adjusted system data. Evaluate the adjustment direction: If the total output power after adjustment (which can be estimated based on the Pf, Pr of each channel and the synthesizer model, or directly obtained from the total output detection) increases, continue fine-tuning in this direction; if it decreases, fine-tune in the opposite direction. This process is repeated on the link until a locally optimal phase point for the link at the current power is found.

[0039] S5: Cyclic Operation and Power Ramp-up: Repeat steps S2-S4, prioritizing the adjustment of the link with the highest current Pr in each round. After several rounds of adjustment, when the increase in total output power tends to level off (the change is less than the threshold), the host computer determines that the phase consistency at the current power level has been initially optimized. At this point, under the premise of meeting safety constraints, the amplitude setting value of the multi-channel amplitude and phase control unit of all links is synchronously and slightly increased, so that Pf of each channel increases by a fixed step size.

[0040] S6: Iterate to rated power: Repeat steps S2-S5, performing a new round of phase optimization iterations after each power ramp-up. Continue until the Pf of all channels reaches the rated operating power and the total output power reaches or approaches the target value.

[0041] S7: Amplitude Consistency Fine-tuning: Under rated power, keep the phase of each channel unchanged, and fine-tune the amplitude of the multi-channel amplitude and phase control unit of each link according to the difference in Pf value detected by each channel, so that the Pf of all links is consistent.

[0042] S8: Real-time monitoring: Records the amplitude and phase parameters of the multi-channel amplitude and phase control units of each link as the operating point. The system enters normal operation monitoring state and can periodically or re-trigger the calibration process based on performance degradation.

[0043] S9: Calibration Completion and Safety Protection: Throughout the calibration process and during the system's steady-state operation, the constraint condition judgment in step S2 is continuously executed; if any link violates the constraint condition, the protection mechanism is immediately triggered to reduce or shut down the RF output.

[0044] Furthermore, in step S3, the Pr_i of all ports are compared in real time using a multi-threaded or fast scanning algorithm to dynamically determine the link to be adjusted with the highest priority.

[0045] Furthermore, the phase optimization algorithm in step S4 adopts an optimization algorithm based on gradient estimation or direct search, with the objective function being the synthesized output port power. After each adjustment, a constraint condition check is performed, and adjustment directions that violate the constraints are considered invalid.

[0046] Furthermore, the method is implemented using a field-programmable gate array (FPGA) and a digital signal processor (DSP) to meet the requirements of real-time processing and rapid control of multi-channel data.

[0047] The beneficial effects of adopting the above technical solution are as follows: 1. High security: By embedding port VSWR and reflected power as hard constraints into the core of the optimization algorithm, the risk of a surge in reflected power and damage to isolators and power amplifiers caused by traditional unconstrained algorithms under worst-case conditions is fundamentally avoided, greatly improving system reliability.

[0048] 2. High calibration efficiency: The proposed strategy of "prioritizing the adjustment of the channel with the maximum reflected power" conforms to the physical characteristics of the power combining system. It can quickly locate the "problem channel" that has the most negative impact on the combining efficiency and correct it first, so that the total output power of the system converges to the optimal value at the fastest speed and reduces the number of ineffective adjustments.

[0049] 3. High calibration accuracy: The system adopts a sequential strategy of "phase first, then amplitude" and "combining phase coarse adjustment with amplitude fine adjustment". Phase inconsistency is the main problem affecting synthesis efficiency and is addressed first; amplitude inconsistency is treated as a secondary problem and is finely corrected, thereby obtaining the best synthesis efficiency.

[0050] 4. High reliability: The calibration process adopts a "gradual increase in power from small to large" approach, which completes the initial phase alignment at low power, eliminating the adverse operating conditions that may be caused by initial phase divergence, and providing a safe basis for fine calibration at high power.

[0051] 5. Dynamic Adaptation: The entire calibration process forms a closed loop, making decisions based on real-time feedback from the synthesizer port. It can automatically compensate for parameter drift caused by component aging, temperature changes, etc., and achieve long-term optimal maintenance of system performance.

[0052] 6. Good engineering practicality: The method has clear logic, is easy to implement through software algorithms, and requires minimal hardware modifications. Through multi-threading and efficient data processing design, it can meet the real-time calibration needs of hundreds or even thousands of synthesis systems, and has excellent scalability.

[0053] Example 3: This embodiment uses a 1MW transmitter system as an application scenario. The system includes 768 transmit links and a 768-port power combiner. The rated output power P_rated of each transmit link is approximately 1400W, and the power load P_safe of the final isolator is 1000W.

[0054] like Figure 1 As shown, the system includes: a main control computer, a multi-channel amplitude and phase controller, 768 identical transmit links (including power amplifiers, isolators, and directional couplers), a power combiner, and a power detection module. The directional couplers are used to sample the forward power Pf and reverse power Pr of each input port and send them back to the main control computer.

[0055] The calibration process is as follows: Parameter settings: Set constraint parameters M=2, P_safe=1000W, initial power P_init=1W, and power increment step ΔP can be set to 10W, 50W, 100W, 1000W, etc., depending on the convergence speed.

[0056] System startup and initialization: All 768 transmit links are set to 1W output, with phase set to random or preset initial value.

[0057] Progressive safety calibration: At 1W power, the main control system reads Pf and Pr from all 768 ports and calculates VSWR. It is confirmed that all ports meet the conditions of VSWR≤2 and Pr≤1000W.

[0058] Running the optimization algorithm: In the current iteration, the algorithm first finds the port k with the largest Pr value. It fine-tunes the phase of the k-th transmit link by one step, and then checks the combined output power and Pr of all ports again. If the combined power increases and all ports still meet the constraints, the adjustment is accepted; otherwise, it backtracks and tries the opposite direction or reduces the step size. At a power level of 1W, it iterates until the combined power no longer increases significantly or reaches the iteration limit, at which point the phase is considered coarsely consistent. The power of all links is increased to 50W, 100W, and 1000W, and the above phase optimization process is repeated. This cycle continues until the power reaches 1400W.

[0059] Amplitude fine-tuning: Once the power reaches 1400W and the phase calibration is stable, the Pf values ​​at each port are measured. Due to device differences, the Pf values ​​may vary. The amplitude control values ​​of each transmit link are fine-tuned to make all Pf values ​​consistent (approximately 1400W), thereby ensuring that the amplitudes of the input signals are consistent.

[0060] Steady-state monitoring: After calibration, the system enters the 1MW synthesized output state. The monitoring thread runs continuously, and once it detects that VSWR>2 or Pr>1000W on any port, it immediately issues an alarm and performs power reduction or shutdown to prevent accidents.

[0061] Using the above methods, while ensuring the absolute safety of all key components in the 768-channel power synthesis system, the consistency calibration of amplitude and phase was efficiently completed, achieving stable and efficient power synthesis of 1MW.

[0062] Example 4: An electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of Embodiment 2 or Embodiment 3.

[0063] Example 5: A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of Embodiment 2 or Embodiment 3.

[0064] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An amplitude and phase consistency calibration system for a high-power combining system, applied to a transmitter comprising multiple transmit link modules and a power combiner, characterized in that, include: (a) Multiple transmit link modules, each module comprising: Multi-channel amplitude and phase control unit: used to generate and output the radio frequency signal of this transmission link, and independently adjust the amplitude and phase of the signal in response to control commands; Power amplification unit: used to amplify the radio frequency signal output by the multi-channel amplitude and phase control unit; Directional coupler: Located at the output end of the power amplification link, it is used to couple the output signal to obtain the forward power sampling signal and the reverse power sampling signal; Detection unit: connected to the directional coupler, used to convert the forward power sampling signal and the reverse power sampling signal into detection signals characterizing the forward power value and the reverse power value; Local control unit: used to collect the detected power signal and report it through the communication interface; (b) Power combiner: which includes a power combiner having N input ports and 1 combiner output port; each transmit link port is connected to a combiner input port through an isolator at its end; (c) Main controller: It communicates with the local control units of all transmit links; (d) Host computer: used to run the calibration algorithm program, which is connected to the main controller; receives the Pf and Pr values ​​reported by all transmission links, and calculates the voltage standing wave ratio of each transmission link based on the Pf and Pr values; Where Pf is the forward power and Pr is the reverse power.

2. The amplitude and phase consistency calibration system in a high-power combining system as described in claim 1, characterized in that: The multi-channel amplitude and phase control unit has independent frequency, phase, and amplitude control registers for each channel, and accepts configuration from the local control unit via an SPI interface.

3. The amplitude and phase consistency calibration system in a high-power combining system as described in claim 1, characterized in that: The power amplification unit includes an RF power amplifier and an isolator.

4. The amplitude and phase consistency calibration system in a high-power combining system as described in claim 1, characterized in that: The host computer adopts a multi-threaded parallel processing architecture, in which at least one thread monitors in real time whether the VSWR and Pr of all transmission links exceed the threshold and triggers protection, while other threads execute the calibration algorithm. Where VSWR is the voltage standing wave ratio and Pr is the reverse power.

5. The amplitude and phase consistency calibration system in a high-power combining system as described in claim 1, characterized in that: The main controller is an FPGA unit that communicates with the host computer via Ethernet and with each local control unit via optical fiber, enabling high-speed, low-latency data acquisition and command distribution.

6. A method for calibrating amplitude and phase consistency in a high-power combining system, characterized in that, Includes the following steps: S1: Initialization and Safe Startup: The multi-channel amplitude and phase control unit sets the output power of all N transmit links to a safe initial value P_init, which is far below the rated power. At the same time, the phase of each link is initialized to the default value or a random value. S2: Data Acquisition and Monitoring: The host computer polls and collects the real-time forward power value Pf and reverse power value Pr of all transmit links and reports them to the host computer; calculates the VSWR of each link and determines in real time whether the safety constraints are met. If any condition is not met, the calibration process will be immediately interrupted, triggering a protection action; S3: Determine the priority adjustment link: Under the condition of meeting the safety constraints, the host computer compares the Pr values ​​of all links and identifies the link with the largest current Pr value as the priority adjustment object in this round. S4: Phase optimization iteration: For the link identified in S3, fine-tune its multi-channel amplitude and phase control unit and collect the adjusted system data; evaluate the adjustment direction: if the total output power increases after adjustment, continue fine-tuning in this direction; if it decreases, fine-tune in the opposite direction; repeat this process on the link until a local optimal phase point for the link under the current power is found. S5: Cyclic Operation and Power Rise: Repeat steps S2-S4, prioritizing the adjustment of the link with the highest current Pr in each round. After several rounds of adjustment, when the growth of the total output power tends to level off, the host computer determines that the phase consistency under the current power level has been initially optimized. At this point, under the premise of meeting safety constraints, the amplitude setting value of the multi-channel amplitude and phase control unit of all links is synchronously and slightly increased, so that Pf of each channel increases by a fixed step size. S6: Iterate to rated power: Repeat steps S2-S5, and perform a new round of phase optimization iteration after each power ramp-up; until the Pf of all channels reaches the rated operating power and the total output power reaches or approaches the target value; S7: Amplitude Consistency Fine-tuning: Under rated power, keep the phase of each channel unchanged, and fine-tune the amplitude of the multi-channel amplitude and phase control unit of each link according to the difference of Pf value detected by each channel, so that the Pf of all links is consistent. S8: Real-time monitoring: Records the amplitude and phase parameters of the multi-channel amplitude and phase control unit of each link as the operating point; when the system enters normal operation monitoring state, the calibration process can be retried periodically or according to the performance degradation. S9: Calibration Completion and Safety Protection: Throughout the calibration process and during the system's steady-state operation, the constraint condition judgment in step S2 is continuously executed; if any link violates the constraint condition, the protection mechanism is immediately triggered to reduce or shut down the RF output.

7. The amplitude and phase consistency calibration method in a high-power combining system as described in claim 6, characterized in that, The safety constraints are as follows: For each input port i, where i = 1, 2, ..., N, its forward incident power Pf_i and backward reflected power Pr_i are monitored in real time, and the following conditions are simultaneously met: 1) Port voltage standing wave ratio VSWR_i ≤ M, where M is a preset safety threshold with a value ≤ 2; 2) The reflected power Pr_i ≤ P_safe, where P_safe is the rated withstand power of the power load of the final stage isolator.

8. The amplitude and phase consistency calibration method in a high-power combining system as described in claim 6, characterized in that, In step S3, the Pr_i of all ports are compared in real time using a multi-threaded or fast scanning algorithm to dynamically determine the link with the highest priority to be adjusted.

9. The amplitude and phase consistency calibration method in a high-power combining system as described in claim 6, characterized in that, In step S4, the phase optimization algorithm adopts an optimization algorithm based on gradient estimation or direct search. Its objective function is the synthesized output port power, and a constraint condition check is performed after each adjustment. Adjustment directions that violate the constraints are considered invalid.

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