Method and device for monitoring input power of radiation immunity test antenna

Abstract

The invention relates to the technical field of electromagnetic compatibility test, and relates to a radiation immunity test antenna input power monitoring method and device, and the device comprises a control device, a power meter, a power amplifier, a signal source, a transmitting antenna module, a radio frequency cable module, and a control cable module. The signal source transmits a first signal to the power amplifier through the radio frequency cable module; the power amplifier is used for receiving a first signal, and the amplified first signal is respectively transmitted to the power meter and the transmitting antenna module through the radio frequency cable module; the transmitting antenna module receives the amplified first signal and sends the amplified first signal to the tested equipment so as to realize interference on the tested equipment; the transmitting antenna module is connected with control equipment through the control cable module; the power meter receives the amplified first signal and transmits the amplified first signal to the control equipment through the control cable module; the control device judges the transmitting state of the transmitting antenna by monitoring the signal strength of the transmitting antenna module.

Description

Technical Field

[0001] This application relates to the field of electromagnetic compatibility testing technology, and particularly to a method and device for monitoring the input power of a radiation immunity test antenna. Background Art

[0002] For electromagnetic compatibility (EMC) radiation immunity testing, the existing technology has the following problems: During the testing process, since the doors of the power amplifier room and the anechoic chamber are tightly locked, engineers and the control computer cannot directly monitor the true power level input to the transmitting antenna in the anechoic chamber. Only the output first signal level of the power amplifier can be monitored through a power meter, which limits the accurate grasp of the actual input power of the transmitting antenna.

[0003] At the same time, the instruments and components in the test system are connected by multiple RF cables of different lengths. These cables may cause attenuation or distortion of the first signal, making the first signal level output by the power amplifier monitored by the power meter not the true power level input to the transmitting antenna.

[0004] Therefore, when the RF cable connection is poor or damaged, it is difficult for the existing technology to quickly locate the fault, which easily leads to incorrect test execution and repeated testing. This not only reduces the test efficiency but may also cause quality accidents due to the inability to ensure test accuracy, seriously affecting the electromagnetic compatibility assessment. Summary of the Invention

[0005] An object of an embodiment of the present invention is to provide a method and device for monitoring the input power of a radiation immunity test antenna, which are used to solve the technical problems in the existing technology, such as insufficient real-time monitoring ability, inability to quickly locate faults, easy to cause incorrect test execution and repeated testing, and thus reduce the test efficiency.

[0006] In a first aspect, an embodiment of the present invention provides a device for monitoring the input power of a radiation immunity test antenna, which is characterized by including a control device, a power meter, a power amplifier, a signal source, a transmitting antenna module, an RF cable module, and a control cable module; the signal source propagates a first signal to the power amplifier through the RF cable module; the power amplifier is used to receive the first signal and transmit the amplified first signal to the power meter and the transmitting antenna module respectively through the RF cable module; the transmitting antenna module receives the amplified first signal and sends the amplified first signal to the device under test to interfere with the device under test; the transmitting antenna module is connected to the control device through the control cable module; the power meter receives the amplified first signal and transmits the amplified first signal to the control device through the control cable module; the control device determines the transmitting state of the transmitting antenna by monitoring the signal strength of the transmitting antenna module.

[0007] In a second aspect, an embodiment of the present invention provides a control device applied to a monitoring device for the input power of a radiated immunity test antenna. The radiated immunity test antenna input power monitoring device further includes a transmitting antenna module, a signal source, and a power amplifier. The method includes:

[0008] Obtain a target signal, where the target signal is a first signal sent by the signal source and obtained after being amplified by the power amplifier;

[0009] Send the target signal to the transmitting antenna module so that the transmitting antenna module transmits the target signal to the device under test;

[0010] Receive a first signal intensity and a second signal intensity sent by at least one single directional coupler in the transmitting antenna module. The first signal intensity is monitored when the target signal is transmitted through the forward transmission channel of the at least one single directional coupler, and the second signal intensity is monitored when the target signal is transmitted through the reverse transmission channel of the transmitting antenna module;

[0011] Calculate the difference between the first signal intensity and the second signal intensity to obtain a target difference;

[0012] If the target difference is greater than or equal to a preset threshold, determine that the target signal has been sent by the transmitting antenna module; or, if the target difference is less than the preset threshold, determine that the target signal has not been sent by the transmitting antenna module.

[0013] In a third aspect, an embodiment of the present invention provides a computer device, including:

[0014] At least one processor; and,

[0015] A memory communicatively connected to the at least one processor; wherein,

[0016] The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the method described in the first aspect.

[0017] In a fourth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program, and the computer program includes program instructions. When the program instructions are executed by a processor, the processor is caused to execute the method described in the first aspect.

[0018] In the solution implemented by the above-mentioned method, computer device, device and storage medium for monitoring the input power of a radiated immunity test antenna, the radiated immunity test antenna input power monitoring device includes a control device, a power meter, a power amplifier, a signal source, a transmitting antenna module, a radio frequency cable module, and a control cable module; the signal source transmits a first signal to the power amplifier through the radio frequency cable module; the power amplifier is used to receive the first signal and transmit the amplified first signal to the power meter and the transmitting antenna module respectively through the radio frequency cable module; the transmitting antenna module receives the amplified first signal and sends the amplified first signal to the device under test to interfere with the device under test; the transmitting antenna module is connected to the control device through the control cable module; the power meter receives the amplified first signal and transmits the amplified first signal to the control device through the control cable module; the control device determines the transmission state of the transmitting antenna by monitoring the signal strength of the transmitting antenna module. This solution realizes the near and real-time monitoring of the signal strength of the input transmitting antenna through the transmitting antenna module, and can quickly identify potential connection risks of the test system, avoiding connection risks that may be overlooked or unrecognized by conventional solutions; the control device can evaluate the transmission state of the transmitting antenna, helping the user understand the performance of the antenna, including whether calibration or replacement is required. When the transmission state of the transmitting antenna is abnormal, the control device can quickly diagnose the problem, such as the loss of the radio frequency cable module, the failure of the power amplifier, etc.; through the combination of the power meter and the control device, the signal strength of the transmitting antenna module can be accurately monitored to ensure the accurate judgment of the transmission state; by amplifying the signal with the power amplifier, a strong interference signal can be effectively sent to the device under test, thereby improving the effectiveness and reliability of the immunity test; through the connection of the radio frequency cable module and the control cable module, seamless integration is achieved among various components, improving the overall efficiency and stability of the system. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments of the present invention. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of a radiated immunity test antenna input power monitoring device in an embodiment of the present invention;

[0021] Figure 2 It is a schematic structural diagram of a transmitting antenna module in an embodiment of the present invention;

[0022] Figure 3 It is a schematic flowchart of a method for monitoring the input power of a radiated immunity test antenna in an embodiment of the present invention;

[0023] Figure 4 It is a schematic structural diagram of a computer device in an embodiment of the present invention. Detailed implementation manners

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that if there is no conflict, the various features in the embodiments of the present invention can be combined with each other and are all within the protection scope of the present invention. In addition, although functional module division is performed in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order from the module division in the device or the flowchart. Furthermore, the terms "first", "second", "third", etc. used in the present invention do not limit the data and execution order, but only distinguish the same items or similar items with basically the same functions and effects.

[0026] The technical solution of the present application is applicable to various electromagnetic compatibility test scenarios.

[0027] Please refer to Figure 1 , in this solution, the radiated immunity test antenna input power monitoring device is composed of a control device, a power meter, a power amplifier, a signal source, a transmitting antenna module, a radio frequency cable module, and a control cable module. The signal source propagates a first signal to the power amplifier through the radio frequency cable module; the power amplifier is used to receive the first signal and transmit the amplified first signal to the power meter and the transmitting antenna module respectively through the radio frequency cable module; the transmitting antenna module receives the amplified first signal and sends the amplified first signal to the device under test to interfere with the device under test; the transmitting antenna module is connected to the control device through the control cable module; the power meter receives the amplified first signal and transmits the amplified first signal to the control device through the control cable module; the control device monitors the signal strength of the transmitting antenna module to judge the transmitting state of the transmitting antenna.

[0028] Among them, the control device is usually a computer or a dedicated test equipment controller. It is responsible for coordinating the operations of all other components, including the setting of the signal source, the adjustment of the power amplifier, the data acquisition of the power meter, and the status monitoring of the transmitting antenna module.

[0029] Among them, the power meter is used to measure the power level of the signal transmitted through the RF cable module. It can provide accurate power readings, which are crucial for ensuring the accuracy and consistency of the test signal.

[0030] Among them, the power amplifier receives the first signal from the signal source and amplifies it to a sufficient level to generate an effective interference signal in the test. The amplifier is designed to ensure that the signal remains stable and has minimal distortion during the amplification process.

[0031] Among them, the signal source generates the first signal, which is usually a standard signal of a specific frequency and waveform, used to simulate electromagnetic interference in the actual working environment.

[0032] Among them, the transmitting antenna module receives the amplified first signal and emits it as an electromagnetic wave to interfere with the device under test. The design and performance of the transmitting antenna module have a direct impact on the accuracy of the test results.

[0033] Among them, the RF cable module is used to connect the signal source, power amplifier, power meter, and transmitting antenna module. They need to be able to withstand high-frequency and high-power signal transmission while minimizing signal loss and distortion.

[0034] Among them, the control cable module is used to transmit control signals and power measurement data. These cables connect the transmitting antenna module and the power meter to the control device to ensure the accurate transmission of data and control instructions.

[0035] Optionally, by monitoring the signal strength of the transmitting antenna module, the control device can understand the transmitting status of the transmitting antenna in real time. If the signal strength does not meet the expectations, the control device can automatically adjust the signal source or power amplifier, or issue an alarm to notify the operator.

[0036] Through the collaboration among the above components, the radiation immunity test antenna input power monitoring device can effectively simulate the electromagnetic interference environment, monitor and adjust the signal transmission status, and ensure the performance stability and reliability of the device under test under different interference conditions.

[0037] This solution uses a transmitting antenna module to achieve near and real monitoring of the signal strength of the input transmitting antenna, and can quickly identify potential connection risks in the test system, avoiding connection risks that may be missed or unrecognized by conventional solutions; the control device can evaluate the transmitting state of the transmitting antenna, helping the user understand the performance of the antenna, including whether calibration or replacement is required. When the transmitting state of the transmitting antenna is abnormal, the control device can quickly diagnose the problem, such as loss of the RF cable module, power amplifier failure, etc.; through the combination of the power meter and the control device, the signal strength of the transmitting antenna module can be accurately monitored to ensure an accurate judgment of the transmitting state; by amplifying the signal with a power amplifier, a strong interference signal can be effectively sent to the device under test, thereby improving the effectiveness and reliability of the immunity test; through the connection of the RF cable module and the control cable module, seamless integration is achieved between various components, improving the overall efficiency and stability of the system.

[0038] In one embodiment, the transmitting antenna module includes a transmitting antenna and a transmitting antenna expansion module; the transmitting antenna expansion module receives the amplified first signal sent by the RF cable module; the transmitting antenna expansion module outputs the amplified first signal to the transmitting antenna according to the forward transmission channel; the transmitting antenna expansion module reflects the transmitted amplified first signal according to the reverse transmission channel.

[0039] Among them, the transmitting antenna is the part that actually emits electromagnetic waves. It converts the amplified RF signal into electromagnetic waves that can propagate in space to interfere with the device under test.

[0040] Among them, the transmitting antenna expansion module is a part of the transmitting antenna module. It is located between the RF cable module and the transmitting antenna and can receive signals, that is, receive the amplified first signal sent by the RF cable module. The amplified first signal is amplified by the power amplifier and transmitted by the RF cable; there is a forward transmission channel inside the transmitting antenna expansion module, which outputs the received amplified first signal to the transmitting antenna. The forward transmission channel ensures that the signal can be effectively transmitted from the power amplifier to the transmitting antenna for transmission; the transmitting antenna expansion module also includes a reverse transmission channel for processing the reflection of the transmitted amplified first signal. In actual situations, due to impedance mismatch or other reasons between the transmitting antenna and the device under test, some signals may be reflected back. The reverse transmission channel allows these reflected signals to return to the transmitting antenna expansion module; the transmitting antenna expansion module may include some components, such as a single directional coupler or a reflectometer, for monitoring the strength of the reflected signal. This information is very important for evaluating the performance of the transmitting antenna and the immunity of the device under test.

[0041] Specifically, by monitoring the reflected signal, the matching degree of the transmitting antenna and the immunity of the device under test can be evaluated. If the reflected signal is too strong, it may be necessary to adjust the parameters of the transmitting antenna or the device under test.

[0042] Optionally, the transmitting antenna expansion module further includes a protection circuit to prevent damage to the transmitting antenna or the power amplifier due to an overly strong reflected signal.

[0043] Optionally, since the transmitting antenna itself is used for EMC radiation immunity testing, to avoid the influence of the transmitting antenna on the components inside the transmitting antenna expansion, the transmitting antenna expansion is usually designed as a closed metal body with a certain shielding effectiveness to block possible external interference. Generally, it should be considered that the transmitting antenna expansion has at least about 60 dB of shielding effectiveness against an environmental electric field interference of 600 V / m. There are not many restrictions on the shape of the transmitting antenna expansion, as long as it is convenient for internal component connection. Try to ensure that the weight and size of the transmitting antenna expansion are not too large.

[0044] It can be seen that in this embodiment, the transmitting antenna module can not only effectively transmit interference signals, but also monitor and evaluate the signal transmission effect, thereby improving the accuracy and reliability of the radiation immunity test.

[0045] Among them, please refer to Figure 2 , Figure 2 which is a schematic structural diagram of a transmitting antenna module provided by an embodiment of the present invention.

[0046] In one embodiment, the transmitting antenna expansion module includes at least one single directional coupler, a forward detector, and a forward indicator; the at least one single directional coupler, the forward detector, and the forward indicator form the forward transmission channel; the at least one single directional coupler receives the amplified first signal sent by the RF cable module and outputs the amplified first signal to the transmitting antenna; the coupling end of the at least one single directional coupler receives a second signal and transmits the second signal to the forward detector; the forward indicator monitors the second signal in the forward detector to calculate the intensity of the first signal input to the transmitting antenna through the second signal; the second signal is a partial signal in the amplified first signal; the operating frequency corresponding to the at least one single directional coupler is greater than or equal to the operating frequency corresponding to the transmitting antenna.

[0047] Among them, the operating frequency of the single directional coupler should cover the operating frequency of the transmitting antenna. If a single directional coupler cannot cover the operating frequency of the transmitting antenna, it can be achieved by splicing multiple single directional couplers. The switching of multiple single directional couplers can be realized through an RF switch.

[0048] Among them, the single-directional coupler is a four-port device that allows signals to pass through with almost no loss in one direction while extracting a part of the signal in the other direction. In the transmitting antenna expansion module, the main functions of the single-directional coupler include: 1. Receiving the amplified first signal sent from the RF cable module and outputting it to the transmitting antenna for transmission to the device under test; 2. The coupling end of the single-directional coupler extracts a part of the passing signal, which is a part of the amplified first signal and is called the second signal.

[0049] Among them, the function of the forward detector is to convert the RF signal into a DC or low-frequency signal, which can be more easily measured and displayed. In the transmitting antenna expansion module, the function of the forward detector is: receiving the second signal, that is, receiving the second signal from the coupling end of the single-directional coupler, and this signal represents a part of the signal passing through the forward transmission channel; calculating the signal strength, that is, through the second signal, the strength of the first signal input to the transmitting antenna can be calculated, and a real-time power reading can be provided.

[0050] Among them, the second signal is a small part of the amplified first signal, which is extracted through the coupling end of the single-directional coupler for monitoring and calculating the signal strength.

[0051] For example, for the signal entering the transmitting antenna expansion, most of the energy is directly output to the transmitting antenna via the single-directional coupler, and this signal transmission is called forward transmission. Among the signal energy of forward transmission, a small part leaks to the forward detector via the coupling end of the single-directional coupler, and then the signal energy leaked from the forward transmission is monitored through the forward indicator (for example: 20 dBm). By using the known or calibrated input terminal and coupling end leakage ratio parameter (also called coupling degree, for example: -30 dB), the actual RF energy magnitude input to the single-directional coupler is calculated (for example: 50 dBm). Furthermore, by using the known or calibrated output terminal and input terminal loss parameter (also called insertion loss, for example: -1 dB), the power level entering the transmitting antenna is calculated (for example: 49 dBm). Considering a certain RF cable loss (for example: 0.5 dB), the strength of the first signal input to the transmitting antenna can be truly monitored (for example: 48.5 dBm).

[0052] It can be seen that in this embodiment, the transmitting antenna expansion module can not only ensure that the signal is effectively transmitted to the device under test, but also can monitor and display the strength of the transmitted signal in real time, thereby providing precise control and feedback for the radiated immunity test.

[0053] In one embodiment, the transmitting antenna expansion module further includes a reverse detector and a reverse indicator; the at least one single directional coupler, the reverse detector, and the reverse indicator form the reverse transmission channel; the isolation end of the at least one single directional coupler receives a third signal and transmits the third signal to the reverse detector; the reverse indicator monitors the third signal in the reverse detector to calculate, based on the third signal, the intensity of a second signal reflected from the transmitting antenna; the third signal is a partial signal in the amplified first signal.

[0054] Among them, the reverse detector and the reverse indicator together form the reverse transmission channel. The reverse detector receives the third signal from the isolation end of the single directional coupler and performs detection processing on it. Its main function is to convert the radio frequency signal into a direct current or low-frequency signal for analysis.

[0055] Among them, the reverse indicator is responsible for monitoring the third signal in the reverse detector. By analyzing this signal, the reverse indicator can calculate the intensity of the second signal reflected from the transmitting antenna, which helps to understand the reflection situation encountered by the signal after transmission and evaluate the matching and efficiency of the antenna.

[0056] Among them, the isolation end of the single directional coupler receives the third signal, that is, the partial signal in the amplified first signal. The design of the isolation end allows monitoring of the signal reflection situation without interfering with the forward signal transmission.

[0057] Among them, as the partial signal in the amplified first signal, the third signal provides key information about signal reflection. By analyzing the third signal, it can be understood whether the signal encounters reflection problems during transmission, so as to make necessary adjustments. Due to the characteristics of the single directional coupler, the third signal mainly contains the signal energy reflected back, and the forward transmitted signal will not pass through the isolation end.

[0058] Among them, the reverse transmission channel is composed of the isolation end of at least one single directional coupler, the reverse detector, and the reverse indicator, which allows the test system to monitor and evaluate the intensity of the signal reflected from the transmitting antenna.

[0059] For example, after the signal transmitted in the forward direction is output to the transmitting antenna through a single-directional coupler, a part of it is reflected back. This signal transmission path is called reverse transmission. Among the signal energy transmitted in the reverse direction, a small part leaks to the reverse detector through the isolation terminal of the single-directional coupler, and then the signal energy leaked from the reverse transmission (e.g., 1 dBm) is monitored through the reverse indicator. Based on the known or calibrated output terminal and isolation terminal leakage ratio parameter (also called isolation, e.g., -35 dB), the actual RF energy size reflected from the output terminal of the single-directional coupler (e.g., 36 dBm) is calculated. Considering a certain RF cable loss (e.g., 0.5 dB), the second signal strength reflected from the transmitting antenna (e.g., 36.5 dBm) can be truly monitored. If the difference (e.g., -12 dB) between the second signal strength (e.g., 36.5 dBm) and the first signal strength (e.g., 48.5 dBm) exceeds a certain requirement (e.g., > -15 dB), it is considered that the input power is not effectively transmitted to the transmitting antenna and radiated, so that faults can be effectively identified and troubleshot.

[0060] It can be seen that in this embodiment, through the setting of the reverse transmission channel, the transmitting antenna expansion module can more comprehensively monitor the signal transmission and reflection conditions. This design not only improves the accuracy and reliability of signal transmission, but also provides a real-time feedback mechanism for the system to perform dynamic adjustment during signal transmission to ensure the accuracy and effectiveness of testing. This two-way monitoring is particularly important in a complex electromagnetic environment and helps to improve the quality of the immunity evaluation of the device under test.

[0061] In one embodiment, the operating frequency of the forward detector is greater than or equal to the operating frequency of the transmitting antenna; the operating frequency of the reverse detector is greater than or equal to the operating frequency of the transmitting antenna.

[0062] Among them, the fact that the operating frequency of the forward detector is greater than or equal to the operating frequency of the transmitting antenna means that the forward detector can effectively operate within the operating frequency range of the transmitting antenna. The operating frequency of the detector must be high enough to cover all possible frequencies that the transmitting antenna may use. If the operating frequency of the forward detector is lower than the operating frequency of the transmitting antenna, the detector may not be able to correctly detect and convert the RF signal, resulting in the inability to accurately measure the signal strength transmitted in the forward direction and affecting the accuracy and reliability of the test results.

[0063] Among them, the operating frequency corresponding to the reverse detector is greater than or equal to the operating frequency corresponding to the transmitting antenna, which also means that the reverse detector can effectively operate within the operating frequency range of the transmitting antenna. The reverse detector needs to be able to process the signals reflected from the transmitting antenna, and the frequencies of these signals are the same as those of the transmitting antenna. If the operating frequency of the reverse detector does not meet the requirements, it may not be able to correctly detect the reflected signals, thus unable to provide accurate information about the reflection characteristics of the transmitting antenna, which will lead to errors in the immunity evaluation of the device under test.

[0064] Specifically, the detector usually works on the principle of a broadband diode circuit and has a large measurement dynamic range. The detector converts the radio frequency signal into baseband voltage values of different magnitudes, which can be processed by a low-cost acquisition circuit. The loss between the output and input of the detector can be known in advance or through calibration, so that the energy magnitude leaked from the single directional coupler can be accurately obtained, and then the power level of the input to the transmitting antenna and the power level reflected from the transmitting antenna can be accurately obtained. The upper limit of the measurement power of the diode should exceed the energy magnitude output from the coupled end and the isolated end of the single directional coupler to avoid being burned out or causing non-linear operation.

[0065] It can be seen that in this embodiment, by ensuring that the operating frequencies of the forward and reverse detectors are greater than or equal to the operating frequency of the transmitting antenna, the entire device can more effectively process various complex situations in signal transmission and reflection, not only improving the accuracy and reliability of signal processing, but also enhancing the adaptability of the device under different working conditions, thus contributing to improving the quality of the immunity evaluation of the device under test.

[0066] In one embodiment, both the forward indicator and the reverse indicator are voltage acquisition circuits; the sampling bandwidth and rate corresponding to the voltage acquisition circuit are greater than twice the bandwidth of the first signal transmitted on the path and the sampling bit accuracy is not less than 0.5 dB.

[0067] Among them, both the forward indicator and the reverse indicator adopt voltage acquisition circuits to obtain and monitor the voltage changes of the signals. By acquiring the voltage signals, the circuit can provide real-time data on the signal strength and waveform.

[0068] Among them, the sampling bandwidth and rate of the voltage acquisition circuit are designed to be greater than twice the bandwidth of the first signal transmitted on the path. This conforms to the Nyquist sampling theorem, ensuring the complete capture of the signal and preventing aliasing. By setting a higher sampling bandwidth and rate, the circuit can accurately capture the rapidly changing signal characteristics, thus providing higher resolution and accuracy.

[0069] Among them, the design of the sampling bit precision is not less than 0.5 dB, which means that the circuit can distinguish subtle signal strength changes. A higher sampling bit provides a larger dynamic range and finer signal quantization ability, ensuring accurate measurement and analysis under various signal conditions.

[0070] Specifically, the forward indicator and the reverse indicator are usually a low-cost voltage acquisition circuit that converts the physical voltage output by the detector into a value that can be recognized by an engineer or a remote computer program. For ease of use, the indicator usually also has a simple screen to display voltage or power values. For ease of remote control, the indicator can usually publish voltage or power values through a serial port protocol, etc. To achieve accurate acquisition effects, the sampling bandwidth and rate of the voltage sampling circuit should be more than twice the bandwidth of the signal transmitted on the path, and the sampling bit should be accurate to at least 0.5 dB.

[0071] Therefore, the forward indicator and the reverse indicator can provide high-precision signal monitoring and analysis capabilities.

[0072] It should be noted that the above-mentioned radiation immunity test antenna input power monitoring device can execute the radiation immunity test antenna input power monitoring method provided by the embodiments of the present application, and has the corresponding functional modules and beneficial effects for executing the method. For technical details not described in detail in the embodiments of the radiation immunity test antenna input power monitoring device, reference can be made to the radiation immunity test antenna input power monitoring method provided by the embodiments of the present application.

[0073] In view of this, the present application proposes a radiation immunity test antenna input power monitoring method to solve the above problems. The following is a specific introduction.

[0074] Please refer to Figure 3 , Figure 3 which is a schematic flowchart of a radiation immunity test antenna input power monitoring method provided by an embodiment of the present invention, applied to a control device in a radiation immunity test antenna input power monitoring device. The radiation immunity test antenna input power monitoring device further includes a transmitting antenna module, a signal source, and a power amplifier. The method includes the following steps:

[0075] S10. Obtain a target signal, where the target signal is a first signal sent by the signal source and amplified by the power amplifier.

[0076] Among them, the function of the transmitting antenna module is to convert an electrical signal into an electromagnetic wave and effectively radiate these waves into space.

[0077] Among them, the design and characteristics of the signal source determine the initial frequency, modulation method, and intensity of the first signal.

[0078] Among them, the first signal is amplified by a power amplifier. The function of the power amplifier is to increase the power of the signal so that it can be transmitted over a longer distance or drive a load that requires higher power. During the amplification process, the integrity of the signal needs to be maintained to avoid distortion or the introduction of unnecessary noise.

[0079] Among them, the signal amplified by the power amplifier is the target signal. This signal has a sufficient power level to meet the transmission or processing requirements of the system.

[0080] It can be seen that in this embodiment, the signal can be effectively obtained from the signal source and amplified to meet the requirements of specific applications.

[0081] S20. Send the target signal to the transmitting antenna module so that the transmitting antenna module transmits the target signal to the device under test.

[0082] Among them, the target signal after power amplification is sent to the transmitting antenna module. The main function of the transmitting antenna module is to convert the electrical signal into an electromagnetic wave for wireless transmission.

[0083] Among them, the transmitting antenna module is responsible for transmitting the target signal into space in the form of an electromagnetic wave. The design and characteristics of the antenna determine the radiation direction, coverage range, and efficiency of the signal. The transmitting antenna module may include multiple antenna units to achieve different transmission modes and coverage requirements.

[0084] Among them, the transmitting antenna module transmits the target signal to the device under test. The signal received by the device under test is used for various testing, measurement, or control operations.

[0085] It can be seen that in this embodiment, the target signal can be effectively transmitted from the transmitting end to the receiving end.

[0086] S30. Receive the first signal strength and the second signal strength sent by at least one single directional coupler in the transmitting antenna module. The first signal strength is monitored when the target signal is transmitted through the forward transmission channel of the at least one single directional coupler, and the second signal strength is monitored when the target signal is transmitted through the reverse transmission channel of the transmitting antenna module.

[0087] Among them, in the transmitting antenna module, the single directional coupler is used to monitor the forward and reverse transmission of the signal to ensure the integrity and effectiveness of the signal.

[0088] Among them, the first signal strength refers to the signal strength of the target signal monitored when it is transmitted through the forward transmission channel of at least one single directional coupler. The forward transmission channel usually includes the through port of the single directional coupler, which allows the signal to be transmitted from the signal source to the transmitting antenna without significant signal loss.

[0089] Among them, the second signal strength refers to the signal strength of the target signal monitored when it is transmitted through the reverse transmission channel of the transmitting antenna module. The reverse transmission channel usually involves the coupling port of the single directional coupler, which is used to monitor the signal reflected from the transmitting antenna. The reflected signal may be generated for various reasons, such as impedance mismatch between the antenna and the transmission line, antenna structure problems, etc.

[0090] It can be seen that in this embodiment, by monitoring the forward and reverse signal strengths, the state of signal transmission can be evaluated in real time, and any potential transmission problems can be identified.

[0091] S40. Calculate the difference between the first signal strength and the second signal strength to obtain a target difference.

[0092] Among them, the target difference represents the intensity difference between the forward transmission signal and the reverse reflection signal, that is, the degree of energy loss of the signal during transmission.

[0093] For example, if the difference (e.g., -12 dB) between the second signal strength (e.g., 36.5 dBm) and the first signal strength (e.g., 48.5 dBm) exceeds a certain requirement (e.g., > -15 dB), it is considered that the input power is not effectively transmitted to the transmitting antenna and radiated, so that faults can be effectively identified and troubleshot.

[0094] S50. If the target difference is greater than or equal to the preset threshold, determine that the target signal has been sent by the transmitting antenna module.

[0095] Among them, the preset threshold is a pre-set value, which is based on the design specifications, test standards and expected signal transmission performance of the transmitting antenna module. The preset threshold determines the standard for judging whether the signal is effectively sent.

[0096] Among them, the target difference being greater than or equal to the preset threshold indicates that the signal has less loss during transmission, and most of the energy is successfully sent through the transmitting antenna module. Therefore, it can be determined that the target signal has been successfully sent.

[0097] S60. If the target difference is less than the preset threshold, determine that the target signal has not been sent by the transmitting antenna module.

[0098] Among them, the target difference being less than the preset threshold indicates that a large reflection or loss has occurred during signal transmission and the signal has not been effectively sent through the transmitting antenna module. In this case, it may be necessary to further check and adjust the transmission path or device settings.

[0099] It can be seen that in this embodiment, through difference analysis and threshold judgment, the state of signal transmission can be monitored in real time to ensure the effective transmission of signals. This not only improves the reliability of signal transmission but also helps to identify and solve potential transmission problems.

[0100] By obtaining and comparing the forward and reverse signal strengths in real time, this method can monitor the signal transmission state of the transmitting antenna module in real time; by calculating the difference between the forward and reverse signal strengths, it can accurately determine whether the target signal has been successfully sent by the transmitting antenna module, improving the accuracy of the test; when the target difference is less than the preset threshold, it can quickly identify possible faults or performance degradation of the transmitting antenna module, facilitating timely adjustment or repair; therefore, through automated monitoring and judgment, manual intervention is reduced, the process of radiated immunity testing is optimized, and the test efficiency is improved; the setting of the preset threshold provides a quantitative standard for judging whether the signal has been successfully sent, reducing the risk of misjudgment caused by subjective judgment; it ensures the stability of the transmitting antenna module when sending signals and prevents potential damage risks caused by unstable signal transmission.

[0101] In one embodiment, receiving the first signal strength sent by at least one single directional coupler in the transmitting antenna module includes: obtaining the preset coupling degree, preset insertion loss, and preset radio frequency cable loss in the transmitting antenna module; obtaining the third signal strength of the target signal in the forward transmission channel; calculating according to the third signal strength and the preset coupling degree to obtain the fourth signal strength input into the at least one single directional coupler; calculating according to the fourth signal strength and the preset insertion loss to obtain the fifth signal strength entering the transmitting antenna in the transmitting antenna module; calculating according to the fifth signal strength and the preset radio frequency cable loss to obtain the first signal strength entering the transmitting antenna in the transmitting antenna module.

[0102] Among them, the preset coupling degree is the leakage ratio parameter between the input end and the coupling end with known or calibrated specifications. For example: -30dB. A coupling degree of -30dB means that the signal strength received at the coupling end is 1 / 1000 of the signal strength at the input end (because -30dB is equivalent to 10 to the power of -30 / 10, that is, 0.001).

[0103] Among them, the preset insertion loss is the loss parameter between the output end and the input end with known or calibrated specifications. For example: -1dB. An insertion loss of -1dB means that the signal strength at the output end is 1dB lower than that at the input end.

[0104] Among them, the preset radio frequency cable loss describes the loss of the signal when passing through the radio frequency cable, usually expressed in dB, which can be 0.5 dB. A loss of 0.5 dB means that the signal intensity decreases by 0.5 dB when passing through the cable. There is no unique limitation here.

[0105] Among them, the third signal intensity is the intensity of the target signal measured in the forward transmission channel.

[0106] Among them, the calculation process of the fourth signal intensity is to calculate the signal intensity entering the single directional coupler according to the third signal intensity and the preset coupling degree. The formula is: Fourth signal intensity = Third signal intensity - Preset coupling degree.

[0107] Among them, the calculation process of the fifth signal intensity is to calculate the signal intensity entering the transmitting antenna in the transmitting antenna module according to the fourth signal intensity and the preset insertion loss. The formula is: Fifth signal intensity = Fourth signal intensity + Preset insertion loss.

[0108] Among them, the calculation process of the first signal intensity is to calculate the final signal intensity of the transmitting antenna entering the transmitting antenna module according to the fifth signal intensity and the preset radio frequency cable loss. The formula is: First signal intensity = Fifth signal intensity - Preset radio frequency cable loss.

[0109] For example, the signal output by the power amplifier enters the interior of the transmitting antenna extension via the radio frequency cable. Most of the energy of the signal entering the transmitting antenna extension is directly output to the transmitting antenna via the single directional coupler. This signal transmission is called forward transmission. Among the signal energy of the forward transmission, a small part leaks to the forward detector via the coupling end of the single directional coupler, and then the forward indicator monitors the signal energy leaked from the forward transmission (for example: 20 dBm). By using the known or calibrated input end to coupling end leakage ratio parameter (also called coupling degree, for example: -30 dB), the actual radio frequency energy magnitude (for example: 50 dBm) input to the single directional coupler is calculated. Furthermore, by using the known or calibrated output end to input end loss parameter (also called insertion loss, for example: -1 dB), the power level entering the transmitting antenna (for example: 49 dBm) is calculated. Considering a certain radio frequency cable loss (for example: 0.5 dB), the power level input to the transmitting antenna (for example: 48.5 dBm) is truly monitored. The power level is the signal intensity, so the first signal intensity of 48.5 dBm can be obtained here.

[0110] It can be seen that in this embodiment, through the above calculation steps, the loss of the signal in the transmission path can be accurately evaluated.

[0111] In one embodiment, receiving the second signal strength transmitted by at least one single directional coupler in the transmitting antenna module includes: obtaining a preset isolation degree and a preset radio frequency cable loss in the transmitting antenna module; obtaining a sixth signal strength of the target signal in the reverse transmission channel; calculating according to the sixth signal strength and the preset isolation degree to obtain a seventh signal strength; and calculating according to the seventh signal strength and the preset radio frequency cable loss to obtain a second signal strength reflected from the transmitting antenna in the transmitting antenna module.

[0112] Among them, the preset isolation degree is the leakage ratio parameter of the output end and the isolation end with known specifications or calibrated, for example: -35dB. An isolation degree of -35dB means that the signal strength received at the isolation end is 1 / 3162 of the signal strength at the output end (because -35dB is equivalent to 10 to the power of -35 / 10, that is, 0.0003162).

[0113] Among them, the sixth signal strength refers to the signal strength reflected from the transmitting antenna and monitored through the isolation end of the single directional coupler.

[0114] Among them, the calculation process of the seventh signal strength is to calculate the strength of the signal after isolation processing according to the sixth signal strength and the preset isolation degree. The formula is: Seventh signal strength = Sixth signal strength - Preset isolation degree.

[0115] Among them, the calculation process of the second signal strength is to calculate the actual signal strength reflected from the transmitting antenna in the transmitting antenna module according to the seventh signal strength and the preset radio frequency cable loss. The formula is: Second signal strength = Seventh signal strength + Preset radio frequency cable loss.

[0116] For example, in the signal energy of the reverse transmission, a small part leaks to the reverse detector through the isolation end of the single directional coupler, and then the signal energy leaked from the reverse transmission is monitored through the reverse indicator (for example: 1dBm). Through the leakage ratio parameter of the output end and the isolation end with known specifications or calibrated (also called isolation degree, for example: -35dB), the actual radio frequency energy size reflected from the output end of the single directional coupler is calculated (for example: 36dBm), and then considering a certain radio frequency cable loss (for example: 0.5dB), the power level reflected from the transmitting antenna is truly monitored (for example: 36.5dBm). The power level is the signal strength, so the second signal strength of 36.5dBm can be obtained here.

[0117] It can be seen that in this embodiment, through the above calculation steps, the strength and reflection characteristics of the reverse signal can be accurately evaluated.

[0118] It should be noted that in the above embodiments, there is not necessarily a certain order among the above steps. Those of ordinary skill in the art can understand from the description of the embodiments of the present application that in different embodiments, the above steps can have different execution orders, that is, they can be executed in parallel or exchanged, etc.

[0119] See Figure 4 , Figure 4 which is a schematic structural diagram of a computer device provided by an embodiment of the present application. The computer device includes one or more processors 41 and a memory 42. The memory 42 is connected to one or more processors 41, for example, connected to the processor 41 through a bus.

[0120] The processor 41 is configured to support the computer device to execute the corresponding functions in the method of the above method embodiment. The processor 41 may be a central processing unit (CPU), a network processor (NP), a hardware chip, or any combination thereof. The above hardware chip may be an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The above PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof.

[0121] The memory 42 is used to store program codes, etc. The memory 42 may include a volatile memory (VM), such as a random access memory (RAM); the memory 42 may also include a non-volatile memory (NVM), such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD); the memory 42 may further include a combination of the above types of memories.

[0122] The memory 42 can be used to store non-volatile software programs, non-volatile computer-executable programs, and modules, such as the program instructions / modules corresponding to the radiation immunity test antenna input power monitoring method in the embodiments of the present application. The processor 41 executes various functional applications and data processing of the radiation immunity test antenna input power monitoring method and the radiation immunity test antenna input power monitoring device by running the non-volatile software programs, instructions, and modules stored in the memory 42, that is, to implement the functions of each module or unit of the radiation immunity test antenna input power monitoring method and the radiation immunity test antenna input power monitoring device provided in the above method embodiments.

[0123] The memory 42 may include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function. The data storage area can store data created according to the use of the radiation immunity test antenna input power monitoring device, etc. In some embodiments, the memory 42 may optionally include a memory 42 remotely set relative to the processor 41, and these remote memories 42 can be connected to the radiation immunity test antenna input power monitoring device through a network. Examples of the above network include but are not limited to the Internet, enterprise intranet, local area network, mobile communication network, and combinations thereof.

[0124] The one or more modules are stored in the memory 42 and, when executed by the one or more processors 41, execute the radiation immunity test antenna input power monitoring method in any of the above method embodiments. For example, execute the method steps described in the above method embodiments to implement the functions of the modules described in the above device embodiments.

[0125] The embodiments of the present application also provide a computer-readable storage medium. The computer-readable storage medium stores a computer program, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer is caused to execute the method as described in the foregoing embodiments.

[0126] Those of ordinary skill in the art can understand that all or part of the processes of implementing the methods in the above embodiments can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. Among them, the storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0127] The above-disclosed are only the preferred embodiments of the present application. Of course, the scope of the rights of the present application cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A radiation immunity test antenna input power monitoring device, characterized in that: It includes a control device, a power meter, a power amplifier, a signal source, a transmitting antenna module, a radio frequency cable module, and a control cable module; the signal source transmits a first signal to the power amplifier through the radio frequency cable module; the power amplifier is used to receive the first signal, and transmit the amplified first signal to the power meter and the transmitting antenna module respectively via the radio frequency cable module; The transmitting antenna module receives the amplified first signal and sends the amplified first signal to the device under test to interfere with the device under test; the transmitting antenna module is connected to the control device through the control cable module; the power meter receives the amplified first signal and transmits the amplified first signal to the control device through the control cable module; The control device determines the transmission state of the transmitting antenna by monitoring the signal strength of the transmitting antenna module.

2. According to the radiated immunity test antenna input power monitoring device of claim 1, the transmitting antenna module comprises a transmitting antenna and a transmitting antenna expansion module; The transmitting antenna extension module receives the amplified first signal sent by the radio frequency cable module; The transmitting antenna expansion module outputs the amplified first signal to the transmitting antenna according to the forward transmission channel; The transmitting antenna extension module reflects the amplified first signal that has been sent according to a reverse transmission channel.

3. The radiated immunity test antenna input power monitoring device according to claim 2, characterized in that: The transmitting antenna expansion module includes at least one single directional coupler, a forward detector and a forward indicator; the at least one single directional coupler, the forward detector and the forward indicator constitute the forward transmission channel; the at least one single directional coupler receives the amplified first signal sent by the RF cable module, and outputs the amplified first signal to the transmitting antenna; The coupling end in the at least one single directional coupler receives a second signal and transmits the second signal to the forward detector; the forward indicator monitors the second signal in the forward detector to calculate the first signal strength of the input transmitting antenna through the second signal; the second signal is a local signal in the amplified first signal; the operating frequency corresponding to the at least one single directional coupler is greater than or equal to the operating frequency corresponding to the transmitting antenna.

4. The radiated immunity test antenna input power monitoring device according to claim 3, characterized in that: The transmitting antenna extension module also includes a reverse detector and a reverse indicator; the at least one single directional coupler, the reverse detector and the reverse indicator constitute the reverse transmission channel; the isolation end in the at least one single directional coupler receives the third signal and transmits the third signal to the reverse detector; The reverse indicator monitors the third signal in the reverse detector to calculate the strength of the second signal reflected from the transmitting antenna through the third signal; the third signal is a local signal in the amplified first signal.

5. The device for monitoring antenna input power for radiated immunity testing according to claim 3, characterized in that: The working frequency corresponding to the forward detector is greater than or equal to the working frequency corresponding to the transmitting antenna; the working frequency corresponding to the reverse detector is greater than or equal to the working frequency corresponding to the transmitting antenna.

6. The radiated immunity test antenna input power monitoring device according to claim 3, characterized in that: The forward indicator and the reverse indicator are both voltage acquisition circuits; the sampling bandwidth and rate corresponding to the voltage acquisition circuit are greater than twice the bandwidth of the first signal transmitted on the path and the sampling bit accuracy is not less than 0.5dB.

7. A method for monitoring antenna input power in a radiation immunity test, characterized in that: A control device applied to a radiation immunity test antenna input power monitoring device, wherein the radiation immunity test antenna input power monitoring device further comprises a transmitting antenna module, a signal source, and a power amplifier, and the method comprises: Acquire a target signal, where the target signal is a first signal sent by the signal source and is a signal obtained after being amplified by the power amplifier; Sending the target signal to the transmitting antenna module so that the transmitting antenna module transmits the target signal to the device under test; Receive a first signal strength and a second signal strength sent by at least one single directional coupler in the transmitting antenna module, wherein the first signal strength is obtained by monitoring when the target signal is transmitted through a forward transmission channel of the at least one single directional coupler, and the second signal strength is obtained by monitoring when the target signal is transmitted through a reverse transmission channel of the transmitting antenna module; Calculate the difference between the first signal strength and the second signal strength to obtain a target difference; If the target difference is greater than or equal to a preset threshold, it is determined that the target signal has been sent by the transmitting antenna module; or, If the target difference is less than the preset threshold, it is determined that the target signal is not sent by the transmitting antenna module.

8. The method according to claim 7, characterized in that The receiving a first signal strength sent by at least one single directional coupler in the transmitting antenna module includes: Obtaining a preset coupling degree, a preset insertion loss, and a preset radio frequency cable loss in the transmitting antenna module; Acquire a third signal strength of the target signal in the forward transmission channel; Calculating according to the third signal strength and the preset coupling degree to obtain a fourth signal strength input to the at least one single directional coupler; Calculating according to the fourth signal strength and the preset insertion loss to obtain a fifth signal strength of the transmitting antenna entering the transmitting antenna module; A calculation is performed based on the fifth signal strength and the preset radio frequency cable loss to obtain a first signal strength of the transmitting antenna entering the transmitting antenna module.

9. The method according to claim 7, characterized in that: The receiving a second signal strength sent by at least one single directional coupler in the transmitting antenna module includes: Obtaining a preset isolation and a preset radio frequency cable loss in the transmitting antenna module; Acquire a sixth signal strength of the target signal in the reverse transmission channel; Calculating according to the sixth signal strength and the preset isolation degree to obtain a seventh signal strength; A calculation is performed based on the seventh signal strength and the preset radio frequency cable loss to obtain a second signal strength reflected from the transmitting antenna in the transmitting antenna module.

10. A computer device, comprising a memory and a processor, wherein the memory is connected to the processor, and the processor is used to execute one or more computer programs stored in the memory, and when the processor executes the one or more computer programs, the computer device implements the method according to any one of claims 7 to 9.

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