Microwave power testing method, platform and multi-channel microwave power consistency control method

Abstract

The present invention discloses a microwave power testing method, platform, and multi-channel microwave power consistency control method. The microwave power testing method first adjusts the test environment temperature or the preheating time of the microwave signal source until the test environment temperature is within a preset temperature range and the preheating time of the microwave signal source meets the preset time range. Then, the test parameters of the microwave signal source are set. Then, starting from the initial power, the current output power of the microwave signal source is adjusted according to the power step size. The microwave signal source is controlled to output the microwave signal to the detection module to be tested according to the current output power. The output voltage of the detection module to be tested is obtained, the output voltage is processed and stored, and when the current output power of the microwave signal source reaches the end power, a test end signal is displayed and the test is stopped. The input power test data and the corresponding output voltage test data of the detection module to be tested are obtained. The present invention can effectively improve the efficiency and reliability of microwave power testing.

Description

Technical Field

[0001] The present invention relates to the technical field of microwave power detection, and in particular to a microwave power testing method and platform, and a multi-channel microwave power consistency control method. Background Art

[0002] In the field of microwave power detection, particularly in high-power microwave systems (peak power exceeding 100 MW, with a frequency range of 1 GHz to 300 GHz) such as artificial solar fusion devices and microwave plasma diamond production equipment, it is often necessary to simultaneously detect the power of multiple microwave signals. Such systems typically involve dozens or even hundreds of microwave sources and place extremely high demands on detection accuracy and consistency.

[0003] To improve detection accuracy and consistency, Chinese patent publication number CN119780518A discloses a multi-channel microwave power detection consistency control method. This method first uses a π-attenuation test circuit unit to determine the initial π-attenuation value for each branch detector module. It then performs a multi-channel microwave power test based on this initial π-attenuation value to obtain test data. The branch detector module with the test data closest to the average of all test data is then selected as a reference circuit. The reference circuit is then used to adjust the π-attenuation values ​​of other branches to improve the consistency of multi-channel microwave power detection. However, for dozens or even hundreds of microwave sources, existing tests often rely on a combination of dispersed equipment, requiring manual coordination of microwave source output, signal acquisition, and data recording. This makes automated processes impossible, and test data is prone to human error. Furthermore, environmental stability for multi-batch, multi-channel testing is difficult to control, resulting in long test cycles and difficulty ensuring test data consistency. Summary of the Invention

[0004] The purpose of the present invention is to provide a microwave power testing method, platform and multi-channel microwave power consistency control method to improve the efficiency of microwave power testing and the reliability of test data, thereby enhancing the consistency of multi-channel microwave power detection.

[0005] To achieve the above objectives, the present invention provides a microwave power testing method, comprising:

[0006] Obtaining a test environment temperature and a preheating time of a microwave signal source, and adjusting the test environment temperature and the preheating time of the microwave signal source until the test environment temperature is within a preset temperature range and the preheating time of the microwave signal source meets a preset time range;

[0007] Setting test parameters of the microwave signal source; wherein the test parameters include initial power, end power and power step;

[0008] Starting from the initial power, adjusting the current output power of the microwave signal source according to the power step, and controlling the microwave signal source to output the microwave signal to the detection module to be tested according to the current output power;

[0009] Obtaining the output voltage of the detection module to be tested, and processing and storing the output voltage;

[0010] When the current output power of the microwave signal source reaches the end power, a test end signal is displayed and the test is stopped, and power test data of the detection module to be tested is obtained.

[0011] Optionally, when a plurality of detection modules to be tested are tested in batches, the method further includes:

[0012] Before testing the current batch of detector modules to be tested, extract at least three tested detector modules from the tested batch of detector modules for retesting;

[0013] Compare the output voltage data of the retested detection module with the output voltage data of the corresponding detection module that has been tested to obtain a voltage data difference;

[0014] If the voltage data difference is less than or equal to the first preset voltage difference, then starting the test of the detection modules to be tested in the current batch;

[0015] If the voltage data difference is greater than or equal to the second preset voltage difference, the detection modules of the tested batch and the detection modules to be tested of the current batch are retested within the same time period.

[0016] Optionally, the first preset voltage difference is 0.05 volts, and the second preset voltage difference is 0.1 volts.

[0017] Optionally, obtaining the output voltage of the detection module to be tested includes:

[0018] Each time the current output power of the microwave signal source is adjusted, the output voltage of the detection module to be tested is obtained after waiting for a preset stabilization time; wherein the preset stabilization time is 0.5 to 1 second.

[0019] Optionally, obtaining the output voltage of the detection module to be tested, and processing and storing the output voltage includes:

[0020] For each output power, obtain at least 3 output voltage values ​​of the detection module to be tested at different time points, remove the maximum output voltage and the minimum output voltage, and take the average output voltage as the output voltage of the detection module to be tested for storage at this output power.

[0021] Optionally, the test environment temperature is 25 degrees Celsius, and the preheating time of the microwave signal source is 30 minutes or more.

[0022] To achieve the above objectives, the present invention also provides a microwave power testing platform, comprising:

[0023] A microwave signal source is used to provide a microwave signal with adjustable output power to each detection module to be tested;

[0024] Signal switching module, used for switching microwave signals and electrical signals;

[0025] Data acquisition module, used to collect the output voltage data of each detection module to be tested in real time;

[0026] An acquisition control device is used to execute the microwave power testing method as described in any of the above items.

[0027] Optionally, the acquisition control device is further used to:

[0028] The current output power of the microwave signal source, the output voltage of the detection module to be tested, the test progress, the test environment temperature and the preheating time of the microwave signal source are displayed.

[0029] Optionally, the sampling accuracy of the data acquisition module is not lower than the minimum change in the output voltage of the detection module to be measured.

[0030] To achieve the above objectives, the present invention further provides a multi-channel microwave power consistency control method, comprising:

[0031] Determine the π attenuation range based on test requirements and the linear region of the detector chip;

[0032] Selecting a plurality of resistance value combinations according to the π attenuation value range, performing a π attenuation test on the plurality of resistance value combinations through a π attenuation test circuit unit, and determining the π attenuation initial values ​​of the plurality of branch detection modules;

[0033] Perform multi-channel microwave power detection according to the initial value of π attenuation, obtain multi-channel microwave power test data by the microwave power test method as described in any one of the above items, and select the branch detection module whose microwave power test data is closest to the average value of the multi-channel microwave power test data as the reference circuit;

[0034] Based on the reference circuit, the π attenuation value in each branch detection module is changed to adjust multiple branch detection modules except the reference circuit to control the consistency of multi-channel microwave power detection.

[0035] Compared with the existing technology, the microwave power testing method, platform and multi-channel microwave power consistency control method provided by the present invention can realize rapid power testing and automatic data recording of the detection modules to be tested in each branch, and can effectively avoid data errors caused by long measurement cycles, drift errors of the test equipment itself and interference from environmental changes. It can improve the efficiency of microwave power testing and the reliability of test data, thereby improving the consistency of multi-channel microwave power detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings used in the implementation methods. Obviously, the drawings described below are only some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 This is a flow chart of a microwave power testing method provided by an embodiment of the present invention;

[0038] Figure 2 This is a structural block diagram of a microwave power test platform provided by an embodiment of the present invention;

[0039] Figure 3 is another flow chart of a microwave power testing method provided by an embodiment of the present invention;

[0040] Figure 4 It is a schematic diagram of the parameter setting interface of the acquisition control device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] It should be noted that the embodiments of the present invention are improvements upon the embodiment of a multi-channel microwave power detection consistency control method disclosed in Chinese Patent Publication No. CN119780518A. The microwave power testing method and platform provided in the embodiments of the present invention are primarily designed to improve the reliability of acquired multi-channel microwave power test data, thereby further enhancing the consistency of multi-channel microwave power detection.

[0043] See also Figure 1 , Figure 11 is a flow chart of a microwave power testing method provided by an embodiment of the present invention, wherein the microwave power testing method comprises steps S1 to S5:

[0044] Step S1, obtaining a test environment temperature and a preheating time of a microwave signal source, and adjusting the test environment temperature and the preheating time of the microwave signal source until the test environment temperature is within a preset temperature range and the preheating time of the microwave signal source meets a preset time range;

[0045] Preferably, the test environment temperature is 25 degrees Celsius, and the preheating time of the microwave signal source is 30 minutes or more.

[0046] It is worth noting that by precisely controlling the ambient temperature at 25°C and ensuring that the microwave signal source is preheated for more than 30 minutes, the test errors caused by temperature drift and initial instability of the equipment can be effectively reduced, the repeatability and consistency of the power-voltage data can be improved, and a stable foundation can be laid for the consistency control of subsequent multi-channel detection. At the same time, the problem of repeated calibration due to environmental fluctuations can be avoided, thereby improving test efficiency.

[0047] Step S2: setting test parameters of the microwave signal source; wherein the test parameters include initial power, end power, and power step size;

[0048] Step S3: starting from the initial power, adjusting the current output power of the microwave signal source according to the power step, and controlling the microwave signal source to output the microwave signal to the detection module to be tested according to the current output power;

[0049] Step S4: obtaining the output voltage of the detection module to be tested, and processing and storing the output voltage;

[0050] Specifically, obtaining the output voltage of the detection module to be tested includes:

[0051] Each time the current output power of the microwave signal source is adjusted, the output voltage of the detection module to be tested is obtained after waiting for a preset stabilization time; wherein the preset stabilization time is 0.5 to 1 second.

[0052] Furthermore, the obtaining the output voltage of the detection module to be tested, and processing and storing the output voltage, includes:

[0053] For each output power, obtain at least 3 output voltage values ​​of the detection module to be tested at different time points, remove the maximum output voltage and the minimum output voltage, and take the average output voltage as the output voltage of the detection module to be tested for storage at this output power.

[0054] For example, after the output power of the microwave signal source is adjusted from 10dBm to 11dBm, wait for 0.8 seconds, and then collect the output voltage of the detection module to be tested at three different time points within 1 second, such as 1.23V, 1.25V, and 1.24V. After eliminating the maximum value 1.25V and the minimum value 1.23V, take the average value 1.24V as the output voltage corresponding to the 11dBm power and store it.

[0055] It is worth noting that the preset stabilization time ensures the stable output of the signal after power adjustment, avoiding the impact of instantaneous fluctuations; the method of taking the average value of multiple acquisitions further filters out random noise, significantly improving the accuracy and repeatability of the output voltage data.

[0056] Step S5: When the current output power of the microwave signal source reaches the end power, a test end signal is displayed and the test is stopped, and power test data of the detection module to be tested is obtained.

[0057] It should be noted that the power test data and the input power of the detection module to be tested (that is, the output power of the microwave signal source) and the output voltage data corresponding to the input power.

[0058] In summary, the microwave power testing method provided by the embodiment of the present invention ensures the stability of the initial test conditions by pre-adjusting the test environment temperature and the preheating time of the microwave signal source, reduces the interference of external factors on the test results, can reduce the errors caused by temperature drift and equipment instability, and makes the repeatability error of the power-voltage test data smaller; by setting the initial power, end power and power step and testing point by point according to the step, the output voltage data of the detection module to be tested at different powers can be systematically obtained, thereby ensuring the comprehensiveness of the test; at the same time, data processing and storage and test termination judgment are automatically completed, thereby improving test efficiency and data reliability.

[0059] Understandably, batch testing becomes necessary when measuring dozens or even hundreds of detector modules. However, microwave signal sources are susceptible to environmental factors such as temperature, causing slight fluctuations in output power of approximately 0.1-0.3 dB, which can affect measurement results. For high-precision multi-channel (tens to hundreds of channels) microwave power testing, differences in results between batches (for example, between the first and second batches) are difficult to meet. Furthermore, directly comparing data from different batches without verifying the consistency of the test environment can lead to unreliable consistency conclusions for multi-channel microwave power testing.

[0060] Therefore, in an optional embodiment, when a plurality of detection modules to be tested are tested in batches, the microwave power testing method further includes:

[0061] Before testing the current batch of detector modules to be tested, extract at least three tested detector modules from the tested batch of detector modules for retesting;

[0062] Compare the output voltage data of the retested detection module with the output voltage data of the corresponding detection module that has been tested to obtain a voltage data difference;

[0063] If the voltage data difference is less than or equal to the first preset voltage difference, then starting the test of the detection modules to be tested in the current batch;

[0064] If the voltage data difference is greater than or equal to the second preset voltage difference, the detection modules of the tested batch and the detection modules to be tested of the current batch are retested within the same time period.

[0065] In an optional embodiment, the first preset voltage difference is 0.05 volts, and the second preset voltage difference is 0.1 volts.

[0066] That is, based on the above embodiment, the embodiment of the present invention further designs a test data acquisition process for scenarios where batch testing is necessary. To ensure measurement consistency as much as possible, for example, before the start of the second batch of tests, at least three branch detection modules are randomly selected from the first batch of tested detection modules for retesting. The retested data of the selected branch detection modules are compared with the original test data of the branch detection modules of the selected devices during the first batch of tests, with a focus on differences in test data at high-power test points, such as 15-20 dBm.

[0067] The purpose of comparison is mainly to determine whether the test environments of different batches are consistent. For example, if the difference between the voltage data corresponding to each power of the detection module extracted during the retest and the voltage data for each power during the original test is ≤±0.05 V, it indicates that the test environment (including the state of the microwave source) is stable, and the second batch of tests can be considered to have the same measurement conditions as the first batch, and the second batch of tests can be carried out. If the difference is ≥0.1 V, it indicates that the test environment temperature or the state of the microwave signal source has changed significantly. In this case, the second batch of tests must be strictly scheduled to be carried out within the same time period as the first batch of tests. At the same time, it is necessary to ensure that the microwave signal source has been preheated and stabilized (it is recommended to run it for at least half an hour), and strictly control the test environment temperature (for example, the environment temperature can be maintained at a constant temperature of 25°C by air conditioning).

[0068] It should be noted that if ±0.05 V < difference < 0.1 V, it means that there are slight fluctuations in the environment or microwave source status (not drastic changes). You can first check whether there is temporary interference (such as power supply voltage fluctuations, external electromagnetic interference, poor contact of the connection interface, etc.), and re-measure after eliminating accidental factors. If the difference is ≤ ±0.05 V after re-testing, it can be determined to be temporary interference and a second batch of tests can be allowed. If the test has extremely high consistency requirements, even if the difference is between 0.05-0.1 V, it is recommended to suspend the test and continue after troubleshooting and stabilization (to avoid the accumulation of small errors affecting the results); if it is a routine functional test (with lower consistency requirements) and the fluctuation is stable in this range (not continuously increasing), you can record the fluctuation value and continue the test, and note the environmental conditions in the results.

[0069] Similarly, the third batch and subsequent batches all use the comparison results of the previous batch to make environmental judgments, which can reduce the differences in the measurement results of multiple batches and effectively ensure the consistency of the measurement results of multiple batches.

[0070] It should be noted that the current testing of multiple branch detection modules still relies mainly on manual adjustment of microwave source power and manual recording of detection voltage. The test is time-consuming, especially when testing multiple channels in parallel. Manual operation cannot synchronously control multiple devices, which easily leads to long test cycles. Manual recording is prone to omissions and errors, resulting in poor synchronization between microwave input power and detection output voltage. At the same time, during long-term testing, the microwave signal source may cause unstable output in the high-power range (such as 15-20dBm) due to "thermal drift", and manual testing cannot quickly complete the full-range scan, which will amplify the interference of drift on test data.

[0071] Therefore, based on the above embodiment, the embodiment of the present invention further provides a microwave power test platform. Figure 2 , Figure 2 This is a structural block diagram of a microwave power test platform provided by an embodiment of the present invention. Figure 2 As shown, the microwave power test platform 200 includes:

[0072] The microwave signal source 201 is used to provide a microwave signal with adjustable output power to each detection module to be tested;

[0073] The signal switching module 202 is used to switch microwave signals and electrical signals;

[0074] The data acquisition module 203 is used to collect the output voltage data of each detection module to be tested in real time;

[0075] The acquisition control device 204 is used to execute the microwave power testing method as described in any of the above embodiments.

[0076] In an optional embodiment, the acquisition control device 204 is further configured to:

[0077] The current output power of the microwave signal source, the output voltage of the detection module to be tested, the test progress, the test environment temperature and the preheating time of the microwave signal source are displayed.

[0078] In an optional embodiment, the sampling accuracy of the data acquisition module 203 is not less than the minimum change in the output voltage of the detection module to be measured.

[0079] For example, a suitable microwave signal source may be selected according to the test power range, such as a microwave signal generator of model MG3690C, with a microwave frequency range of 0.1 Hz to 70 GHz and a power output range of -130 dBm to +30 dBm.

[0080] Preferably, the signal adapter module 202 can utilize a BNC-2090A junction box. The BNC-2090A is a desktop or rack-mountable analog breakout screw terminal junction box that can be connected to compatible PXI (Platform for Automation) multifunction I / O (input / output) modules. The shielded housing reduces signal interference and ensures data accuracy.

[0081] Preferably, the data acquisition module 203 can be a National Instruments high-speed acquisition module, model PXIe-6259. The PXIe-6259 utilizes NI-mcal (a software-based calibration algorithm) calibration technology to reduce analog input and output errors caused by time and temperature drift, while an internal reference ensures accuracy and stability.

[0082] Illustratively, the acquisition control device 204 can be a computer or other device having a control program developed according to the microwave power testing method described in any of the above embodiments.

[0083] For example, Figure 2 As shown, the microwave signal emitted by the microwave signal source 201 is transmitted to the detection module to be tested. The detection module to be tested receives the microwave signal and generates a detection voltage analog signal. The analog signal is transmitted to the data acquisition module 203 through the signal adapter module 202. The data acquisition module 203 converts the analog signal into a digital signal, and then completes the acquisition on the control interface corresponding to the acquisition control device 204.

[0084] It can be understood that in order to replace manual operation and solve problems such as low efficiency, poor data synchronization and drift interference, for power test data, the embodiment of the present invention develops a control program for the acquisition control device 204 as shown in the microwave power test method described in any of the above embodiments.

[0085] For example, see Figure 3 , Figure 3 This is another flow chart of a microwave power testing method provided by an embodiment of the present invention. Figure 4 , Figure 4 Schematic diagram of the parameter setting interface of the acquisition control device provided by the embodiment of the present invention. Figure 3 As shown, the microwave power test process is as follows: first, complete the initialization of the microwave signal source and the acquisition card in the data acquisition module. If the ambient temperature is 23°C (lower than the preset range of 25°C) at this time, the programmable computer can be linked to the temperature control device to heat it to 25°C; if the microwave signal source is preheated for only 10 minutes (less than 30 minutes), the test process will be locked until the temperature stabilizes at 25°C and the microwave signal source is preheated for 30 minutes before entering the "waiting to start" state; if the test is not started, the acquisition display will be executed in sequence to display the current output power of the microwave signal source, the output voltage of the detection module to be tested, the test progress, the ambient temperature and the preheating time of the microwave signal source. Then, according to the following Figure 4 The parameter setting interface shown is used to set the test parameters of the microwave signal source, such as initial power -20dBm, end power 25dBm and power step 1dBm; if the test has been started, that is, click Figure 4 Pressing the "Start" button in the figure enters a closed-loop test cycle. The microwave signal source outputs a microwave signal at an initial power of -20dBm, which is transmitted via a cable to the detection module under test. After each power adjustment (for example, from 5dBm to 6dBm), the program waits 0.5 seconds to ensure signal stability before executing the next step, where the data acquisition module collects the microwave output power and the detection voltage of each branch. The acquisition control device processes and stores these data and continuously determines whether the microwave output power (equal to the current output power + the power step size) has reached the end power. If not, the output power is adjusted by the power step size and test data is repeatedly collected until the microwave output power reaches the end power and data collection is complete, triggering a test end signal. Finally, based on the "Test End" determination, the test process is terminated or returned to the "Waiting to Start" state.

[0086] In summary, the microwave power testing method and platform provided by the embodiments of the present invention can realize rapid measurement and automatic data recording of the detection modules to be tested in each branch, effectively avoid test data errors caused by long measurement cycles, drift errors of the microwave signal source itself, and interference from environmental changes, and can improve the efficiency of microwave power testing and the reliability of test data, thereby improving the consistency of multi-channel microwave power detection.

[0087] To further improve the consistency of multi-channel microwave power detection, an embodiment of the present invention further provides a multi-channel microwave power consistency control method, comprising the following steps:

[0088] Determine the π attenuation range based on test requirements and the linear region of the detector chip;

[0089] Selecting a plurality of resistance value combinations according to the π attenuation value range, performing a π attenuation test on the plurality of resistance value combinations through a π attenuation test circuit unit, and determining the π attenuation initial values ​​of the plurality of branch detection modules;

[0090] Perform multi-channel microwave power detection according to the initial value of π attenuation, obtain multi-channel microwave power test data using the microwave power test method described in any of the above embodiments, and select a branch detection module whose microwave power test data is closest to the average value of the multi-channel microwave power test data as a reference circuit;

[0091] Based on the reference circuit, the π attenuation value in each branch detection module is changed to adjust multiple branch detection modules except the reference circuit to control the consistency of multi-channel microwave power detection.

[0092] It is worth noting that when performing multi-channel microwave power detection, the microwave power test method as described in any of the above embodiments can be used to strictly control the ambient temperature and the preheating state of the microwave source, eliminating common interference factors such as temperature drift and initial instability of the equipment. This makes the selection of the "reference circuit" during multi-channel detection more reliable, and the benchmark is determined based on the average value of the test data under a stable environment, avoiding the benchmark offset caused by environmental fluctuations, and providing an accurate reference benchmark for subsequent branch adjustments. At the same time, the automated data processing and storage functions reduce manual recording errors, make the deviation comparison between branches more efficient, and shorten the consistency calibration cycle. In summary, the microwave power test method provides a stable test basis and accurate adjustment basis for multi-channel consistency control, reduces interference factors, and improves the accuracy, efficiency and reliability of consistency control.

[0093] It should be noted that the Chinese patent publication number CN119780518A discloses a method for controlling the consistency of multi-channel microwave power detection. This method fails to account for the subtle impact of a 0.01dB difference on the detection results, especially in scenarios requiring high microwave power detection accuracy. Therefore, the present invention further incorporates more similar resistor combinations for testing.

[0094] For example, in the resistance values ​​around 81.66Ω and 89.24Ω, except for 82Ω and 91Ω, which are very common, other values ​​such as 86.6Ω, 88.7Ω, 90Ω, 93.1Ω and 94.2Ω are also relatively easy to obtain on the market. Therefore, the embodiment of the present invention can also select a total of 7 resistors with resistance values ​​of 82Ω, 86.6Ω, 88.7Ω, 90Ω, 91Ω, 93.1Ω and 94.2Ω for testing. After the 7 resistors are combined in pairs, there are a total of 49 combinations. Through the π attenuation test circuit of the embodiment of the present invention, the attenuation values ​​of the 49 combinations are measured using a vector network analyzer, and the characteristic impedance is measured. See Table 1, which shows the actual attenuation value and impedance corresponding to the π attenuation circuit after each resistor combination provided by the embodiment of the present invention.

[0095] Table 1 Actual attenuation value and impedance of the π decay circuit corresponding to each resistor combination

[0096]

[0097] As shown in Table 1, the measured π attenuation median value for the 49 resistor combinations tested is approximately 11.19 dB. The corresponding three π attenuation resistors are all 82 Ω. Therefore, in this embodiment, these three 82 Ω resistors can be used to form a π attenuation circuit in each branch detection circuit, and 11.19 dB can be used as the initial π attenuation value for each branch. Initially, all N branches use the same initial π attenuation value. The measured values ​​in Table 1 show that the impedances are all greater than 50 Ω, with a maximum of 63.6 Ω. The minimum attenuation value is 10.516 dB, and the maximum attenuation value is 11.88 dB.

[0098] It should be noted that the greater number of resistor combinations tested, i.e., the larger sample size, theoretically makes the results more representative and reliable. The initial π attenuation value obtained from testing 49 resistor combinations was 11.19 dB, a difference of 0.01 dB compared to the previous 49 resistor combinations. Although the two values ​​are relatively close, the consistency control of multi-channel microwave power detection can lead to slight variations in the initial attenuation of each branch. Power fluctuations during the detection process, as well as the characteristics of the detection circuits in different branches, may cause slight deviations in the final measured microwave power data, thereby affecting the judgment and analysis of microwave power detection consistency. Therefore, if high microwave power detection accuracy is required, it is recommended to test with more resistors to determine a more accurate initial π attenuation value.

[0099] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A microwave power testing method, characterized in that: include: Obtaining a test environment temperature and a preheating time of a microwave signal source, and adjusting the test environment temperature and the preheating time of the microwave signal source until the test environment temperature is within a preset temperature range and the preheating time of the microwave signal source meets a preset time range; Setting test parameters of the microwave signal source; wherein the test parameters include initial power, end power and power step; Starting from the initial power, adjusting the current output power of the microwave signal source according to the power step, and controlling the microwave signal source to output the microwave signal to the detection module to be tested according to the current output power; Obtaining the output voltage of the detection module to be tested, and processing and storing the output voltage; When the current output power of the microwave signal source reaches the end power, a test end signal is displayed and the test is stopped, and power test data of the detection module to be tested is obtained; When a plurality of detection modules to be tested are tested in batches, the method further includes: Before testing the current batch of detector modules to be tested, extract at least three tested detector modules from the tested batch of detector modules for retesting; Compare the output voltage data of the retested detection module with the output voltage data of the corresponding detection module that has been tested to obtain a voltage data difference; If the voltage data difference is less than or equal to the first preset voltage difference, then starting the test of the detection modules to be tested in the current batch; If the voltage data difference is greater than or equal to the second preset voltage difference, the detection modules of the tested batch and the detection modules to be tested of the current batch are retested within the same time period.

2. The microwave power testing method according to claim 1, wherein: The first preset voltage difference is 0.05 volts, and the second preset voltage difference is 0.1 volts.

3. The microwave power testing method according to claim 1, wherein: The obtaining the output voltage of the detection module to be tested includes: Each time the current output power of the microwave signal source is adjusted, the output voltage of the detection module to be tested is obtained after waiting for a preset stabilization time; wherein the preset stabilization time is 0.5 to 1 second.

4. The microwave power testing method according to claim 3, wherein: The obtaining the output voltage of the detection module to be tested, and processing and storing the output voltage, includes: For each output power, obtain at least 3 output voltage values ​​of the detection module to be tested at different time points, remove the maximum output voltage and the minimum output voltage, and take the average output voltage as the output voltage of the detection module to be tested for storage at this output power.

5. The microwave power testing method according to claim 1, wherein: The test environment temperature is 25 degrees Celsius, and the preheating time of the microwave signal source is 30 minutes or more.

6. A microwave power test platform, characterized in that: include: A microwave signal source is used to provide a microwave signal with adjustable output power to each detection module to be tested; Signal switching module, used for switching microwave signals and electrical signals; Data acquisition module, used to collect the output voltage data of each detection module to be tested in real time; An acquisition control device, used to execute the microwave power testing method according to any one of claims 1 to 5.

7. The microwave power test platform according to claim 6, characterized in that: The acquisition control device is also used for: The current output power of the microwave signal source, the output voltage of the detection module to be tested, the test progress, the test environment temperature and the preheating time of the microwave signal source are displayed.

8. The microwave power test platform according to claim 7, characterized in that: The sampling accuracy of the data acquisition module is not lower than the minimum change in the output voltage of the detection module to be measured.

9. A multi-channel microwave power consistency control method, characterized in that: include: Determine the π attenuation range based on test requirements and the linear region of the detector chip; Selecting a plurality of resistance value combinations according to the π attenuation value range, performing a π attenuation test on the plurality of resistance value combinations through a π attenuation test circuit unit, and determining the π attenuation initial values ​​of the plurality of branch detection modules; Perform multi-channel microwave power detection according to the initial value of π attenuation, obtain multi-channel microwave power test data by the microwave power test method according to any one of claims 1 to 5, and select a branch detection module whose microwave power test data is closest to the average value of the multi-channel microwave power test data as a reference circuit; Based on the reference circuit, the π attenuation value in each branch detection module is changed to adjust multiple branch detection modules except the reference circuit to control the consistency of multi-channel microwave power detection.

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