CN118101084B - Performance detection method and system based on radio frequency device - Google Patents
Performance detection method and system based on radio frequency device Download PDFInfo
- Publication number
- CN118101084B CN118101084B CN202410484446.XA CN202410484446A CN118101084B CN 118101084 B CN118101084 B CN 118101084B CN 202410484446 A CN202410484446 A CN 202410484446A CN 118101084 B CN118101084 B CN 118101084B
- Authority
- CN
- China
- Prior art keywords
- radio frequency
- frequency device
- performance
- spectrum
- working
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 46
- 238000012360 testing method Methods 0.000 claims abstract description 128
- 238000001228 spectrum Methods 0.000 claims abstract description 75
- 238000005259 measurement Methods 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 24
- 238000011156 evaluation Methods 0.000 claims abstract description 20
- 238000000295 emission spectrum Methods 0.000 claims abstract description 14
- 238000004458 analytical method Methods 0.000 claims description 22
- 230000008859 change Effects 0.000 claims description 22
- 239000012535 impurity Substances 0.000 claims description 19
- 238000012544 monitoring process Methods 0.000 claims description 17
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 230000004044 response Effects 0.000 claims description 7
- 230000009021 linear effect Effects 0.000 claims description 6
- 238000005457 optimization Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 abstract description 7
- 238000011056 performance test Methods 0.000 abstract description 5
- 230000003595 spectral effect Effects 0.000 abstract description 4
- 238000012795 verification Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000009022 nonlinear effect Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
Abstract
The invention belongs to the technical field of measurement, and discloses a performance detection method and system based on a radio frequency device, wherein the method comprises the steps of determining a connection interface and setting operation parameters of a test system; the method comprises the steps of connecting a radio frequency device to a test system, measuring first reflection coefficients of the radio frequency device at different frequencies through a network analyzer, adjusting the network analyzer to a working frequency range, measuring transmission coefficients and second reflection coefficients of the radio frequency device at the working frequency, and searching a resonance peak to detect the working performance of the radio frequency device; switching to a spectrum analyzer to test the emission spectrum of the radio frequency device at the operating frequency to detect the spectral purity of the radio frequency device; providing preset input power for the radio frequency device through the signal generator so as to evaluate the nonlinear characteristic of the radio frequency device; through the gradually deep testing flow in the running process of the radio frequency device, the logic connection and mutual verification between different performance tests are enhanced, the testing efficiency is greatly improved, and the comprehensive and accurate performance evaluation of the radio frequency device is realized.
Description
Technical Field
The invention relates to the technical field of measurement, in particular to a performance detection method and system based on a radio frequency device.
Background
With the rapid development of radio frequency technology applications such as wireless communication and radar systems, radio frequency devices have become an integral part of modern electronic systems. The performance of the radio frequency device directly affects the key indexes such as communication efficiency, signal quality, power consumption and the like of the final system. Therefore, it is becoming particularly important to perform accurate performance testing of the rf device during the production and development stages. The performance test of the radio frequency device can not only effectively improve the product quality and reduce the production cost, but also be beneficial to obtaining advantages in the highly competitive market.
In the existing test technology, performance detection of the radio frequency device generally depends on a series of standardized test flows, and corresponding detection equipment is arranged in parallel at different stations of a production line to evaluate various performances of the radio frequency device, so that basic evaluation of the performance of the radio frequency device can be provided to a certain extent, but some obvious defects exist; firstly, the traditional method often carries out the segmentation processing on each performance test, and lacks a unified framework for comprehensively analyzing each test result, which may neglect the mutual influence among different performance parameters, so that the final evaluation result is not comprehensive enough, and meanwhile, for some special nonlinear characteristics, spectrum purity and other advanced performance indexes, the traditional method is often difficult to accurately quantify, and the reliability and the application universality of the test result are affected.
In view of this, there is a need for improvements in the testing techniques of the radio frequency devices in the prior art to solve the technical problem that the testing lacks effective management and is not comprehensive enough.
Disclosure of Invention
The invention aims to provide a performance detection method and system based on a radio frequency device, which solve the technical problems.
To achieve the purpose, the invention adopts the following technical scheme:
a performance detection method based on a radio frequency device comprises the following steps:
determining a corresponding connection interface in a test system according to target performance parameters to be detected of the radio frequency device, and setting operation parameters of the test system;
The radio frequency device is connected to the test system through a corresponding connection interface, and the first reflection coefficients of the radio frequency device under different frequencies are measured through a network analyzer so as to evaluate the impedance matching performance of the input and output of the radio frequency device;
Adjusting the network analyzer to a working frequency range, measuring a transmission coefficient and a second reflection coefficient of the radio frequency device in the working frequency range, searching a resonance peak, and analyzing the position, the width and the amplitude of the resonance peak to detect the working performance of the radio frequency device;
Switching to a spectrum analyzer, testing the emission spectrum of the radio frequency device at the working frequency, and checking whether impurity harmonic waves or spurious emissions exist or not to detect the spectrum purity of the radio frequency device;
the signal generator is used for providing preset input power for the radio frequency device, and the change condition of the output signal is monitored to evaluate the nonlinear characteristic of the radio frequency device.
Optionally, the radio frequency device is accessed to the test system through a corresponding connection interface; also included before is:
After the operation parameters of the test system are set, a baseline test is carried out on the test system, and the measurement reading at the time of the baseline test is recorded as a reference standard.
Optionally, the radio frequency device is connected to the test system through a corresponding connection interface, and the first reflection coefficient of the radio frequency device under different frequencies is measured through a network analyzer so as to evaluate the impedance matching performance of the input and output of the radio frequency device; the method specifically comprises the following steps:
The radio frequency device is connected to the testing system through a corresponding connection interface, the testing system starts a network analyzer, and preheating and calibrating operations are carried out on the network analyzer;
setting a broad-spectrum test range containing a required measurement frequency band according to the operating frequency and characteristics of the radio frequency device, and measuring a first reflection coefficient by adopting fine-granularity frequency points in the broad-spectrum test range;
Capturing the change of the reflection coefficient by measuring the first reflection coefficient of the radio frequency device under different frequencies, and recording the minimum reflection coefficient value;
And establishing a coordinate graph according to the measured first reflection coefficient and the corresponding frequency value, and performing graphical analysis to evaluate the impedance matching performance of the input and output of the radio frequency device.
Optionally, the network analyzer is adjusted to a working frequency range, a transmission coefficient and a second reflection coefficient of the radio frequency device in the working frequency range are measured, a resonance peak is found, and the position, the width and the amplitude of the resonance peak are analyzed to detect the working performance of the radio frequency device; the method specifically comprises the following steps:
according to the specification and the expected working frequency of the radio frequency device, the scanning frequency range of the network analyzer is adjusted to the working frequency range of the radio frequency device;
Performing calibration operation on the network analyzer again, and measuring a transmission coefficient and a second reflection coefficient of the radio frequency device in a working frequency range through the adjusted and calibrated network analyzer;
and identifying a resonance peak of the radio frequency device in the working frequency range according to the measurement results of the transmission coefficient and the second reflection coefficient.
Optionally, the identifying a resonance peak of the radio frequency device in the operating frequency range further includes:
Deeply analyzing the position, width and amplitude of the resonance peak, and identifying the sharpness of the resonance peak so as to evaluate the quality factor of the radio frequency device;
and the transmission coefficient, the second reflection coefficient and the quality factor are integrated, and the overall working performance of the radio frequency device is evaluated.
Optionally, switching to a spectrum analyzer, testing the emission spectrum of the radio frequency device at the operating frequency, and checking whether impurity harmonics or spurious emissions exist to detect the spectrum purity of the radio frequency device; the method specifically comprises the following steps:
Disconnecting the radio frequency device from the network analyzer, and switching the test system to a working mode of the spectrum analyzer;
According to the spectrum purity detection requirement of the radio frequency device under the working frequency, carrying out parameter configuration of a frequency range, a resolution bandwidth and a detection limit on the spectrum analyzer, wherein the spectrum purity detection requirement comprises a detection range of target harmonic waves and spurious emissions;
preheating and calibrating a spectrum analyzer after parameter configuration, and starting the spectrum analyzer to perform spectrum scanning on the radio frequency device under preset input power;
According to the result of spectrum scanning, identifying unexpected signals of the radio frequency device which exist outside the working frequency, classifying the unexpected signals, and judging whether impurity harmonic waves or spurious emissions exist or not;
analyzing the frequency, amplitude and source of each identified unexpected signal, performing theorem evaluation according to the analysis result, and comparing the theorem evaluation with the preset requirement of the frequency spectrum purity of the radio frequency device to obtain the quality of the frequency spectrum purity of the radio frequency device.
Optionally, the signal generator provides preset input power for the radio frequency device, and monitors the change condition of the output signal of the radio frequency device so as to evaluate the nonlinear characteristic of the radio frequency device; the method specifically comprises the following steps:
disconnecting the radio frequency device from the spectrum analyzer, and switching a test system to a working mode of the signal generator;
Setting parameters of output power level, frequency and waveform of the signal generator according to nonlinear characteristic evaluation requirements of the radio frequency device;
Preheating and calibrating the signal generator after parameter setting, providing preset input power for the radio frequency device through the signal generator, gradually increasing the input power from a first power value to a second power value, and monitoring the change condition of an output signal of the radio frequency device through receiving equipment corresponding to the signal generator;
And recording and analyzing the variation condition of the collected output signal, and analyzing the mode and the reason of the nonlinear behavior by a linear analysis unit to quantitatively evaluate the nonlinear response characteristic of the radio frequency device.
Optionally, the monitoring of the change in the output signal thereof evaluates the nonlinear characteristics thereof; and then further comprises:
And integrating the impedance matching performance, the working performance, the spectrum purity and the nonlinear characteristics of the input and output of the radio frequency device, integrating the performance detection report of the radio frequency device, and providing an optimization strategy for the production and the manufacture of the radio frequency device based on the performance detection report.
Optionally, the test system further includes a switching module, where the switching module includes a first connection module and a second connection module, and the first connection module is electrically connected with the connection interface;
The second connection module is provided with a first contact port electrically connected with the network analyzer, a second contact port electrically connected with the spectrum analyzer and a third contact port electrically connected with the signal generator;
The second connecting module is connected to the first connecting module in a sliding manner, so that when the second connecting module slides, any one of the first contact port, the second contact port and the third contact port is connected with the first connecting module.
The invention also provides a performance detection system based on the radio frequency device, which is used for realizing the performance detection method based on the radio frequency device, and comprises the following steps:
the connection module comprises a plurality of connection interfaces and is used for connecting radio frequency devices of different models;
the network analyzer is used for measuring first reflection coefficients of the radio frequency device under different frequencies so as to evaluate the impedance matching performance of the input and output of the radio frequency device; measuring a transmission coefficient and a second reflection coefficient of the radio frequency device in a working frequency range, searching a resonance peak, and analyzing the position, width and amplitude of the resonance peak to detect the working performance of the radio frequency device;
The spectrum analyzer is used for testing the emission spectrum of the radio frequency device at the working frequency, and checking whether impurity harmonic waves or spurious emissions exist or not so as to detect the spectrum purity of the radio frequency device;
The signal generator is used for providing preset input power for the radio frequency device, and monitoring the change condition of an output signal of the radio frequency device so as to evaluate the nonlinear characteristic of the radio frequency device;
The data acquisition module is used for acquiring measurement data of the network analyzer, the network analyzer and the signal generator;
The display module is used for displaying the measurement data acquired by the data acquisition module;
And the switching module is used for switching the connection between the radio frequency device and any one of the network analyzer, the network analyzer or the signal generator.
Compared with the prior art, the invention has the following beneficial effects: when in detection, the target performance parameters of the radio frequency device to be detected are determined, the proper connection interface in the test system is determined and the operation parameters of the test system are configured according to the target performance parameters, the radio frequency device is connected into the test system through the specific connection interface, the reflection coefficients of the radio frequency device are measured on a plurality of frequency points by utilizing a network analyzer, and the input and output impedance matching performance of the radio frequency device is estimated; the network analyzer is adjusted to adapt to the working frequency range of the radio frequency device, the transmission coefficient and the reflection coefficient of the radio frequency device are measured, the working performance of the radio frequency device is detected by searching a resonance peak and analyzing the position, the width and the amplitude of the resonance peak, the radio frequency device is switched to the frequency spectrum analyzer, the emission spectrum of the radio frequency device under the working frequency is tested to detect whether impurity harmonic waves or stray emission exist or not, and therefore the spectrum purity of the radio frequency device is evaluated; providing preset input power for the radio frequency device through the signal generator, and monitoring the change condition of an output signal of the radio frequency device to evaluate the nonlinear characteristic of the radio frequency device; the performance detection method combines the use of a network analyzer and a spectrum analyzer, realizes comprehensive test from basic impedance matching performance to advanced spectrum purity and nonlinear characteristics, ensures comprehensive detection of the performance of the radio frequency device, strengthens logic connection and mutual verification between different performance tests through a gradually deep test flow in the running process of the radio frequency device, improves the reliability of test results, greatly improves the test efficiency, and realizes comprehensive and accurate performance evaluation of the radio frequency device.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the invention, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the invention, without affecting the effect or achievement of the objective.
FIG. 1 is a flow chart of a performance testing method according to the first embodiment;
FIG. 2 is a second flow chart of the performance testing method according to the first embodiment;
FIG. 3 is a third flow chart of the performance testing method according to the first embodiment;
FIG. 4 is a flow chart of a performance testing method according to the first embodiment;
fig. 5 is a system layout diagram of a performance detection system according to the second embodiment.
Detailed Description
In order to make the objects, features and advantages of the present invention more comprehensible, the technical solutions in the embodiments of the present invention are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. It is noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
Embodiment one:
Referring to fig. 1 to fig. 4, an embodiment of the present invention provides a performance detection method based on a radio frequency device, including:
S1, determining a corresponding connection interface in a test system according to target performance parameters to be detected of a radio frequency device, and setting operation parameters of the test system; among other things, the target performance parameters include frequency range, power level, impedance, which facilitates more specifically selecting the appropriate test interface and configuring the test parameters.
Firstly, according to the target performance parameters of the radio frequency device to be tested, the connection interface required to be used in the test system and the setting of the operation parameters of the test system are determined, a foundation is laid for the subsequent test work, the matching of the test environment and the performance requirements of the radio frequency device is ensured, and therefore the performance of the device can be effectively evaluated.
S2, the radio frequency device is connected to a test system through a corresponding connection interface, and a network analyzer is used for measuring first reflection coefficients of the radio frequency device under different frequencies so as to evaluate the impedance matching performance of the input and output of the radio frequency device; wherein the first reflection coefficient generally refers to the proportion of the signal emitted from port 1 that is reflected by port 1 itself.
The impedance matching performance of the input and output ports of the radio frequency device is evaluated by connecting the radio frequency device to a test system and measuring the first reflection coefficient of the radio frequency device at different frequencies by using a network analyzer. By means of the measurement, whether the radio frequency device can be effectively matched with an external circuit or not can be judged, reflection loss is reduced, and signal transmission efficiency is improved.
S3, adjusting the network analyzer to a working frequency range, measuring a transmission coefficient and a second reflection coefficient of the radio frequency device in the working frequency range, searching a resonance peak, and analyzing the position, the width and the amplitude of the resonance peak to detect the working performance of the radio frequency device; wherein the second reflection coefficient is the proportion of the signal emitted from port 2 that is reflected by port 2 itself.
And adjusting the network analyzer to the working frequency range of the radio frequency device, and measuring the transmission coefficient and the second reflection coefficient in the working frequency range. The working performance of the radio frequency device is detected by searching resonance peaks and relevant characteristics (position, width and amplitude) of the resonance peaks, so that key performance indexes such as gain, loss and bandwidth of the device are evaluated.
S4, switching to a spectrum analyzer, testing the emission spectrum of the radio frequency device under the working frequency, and checking whether impurity harmonic waves or spurious emissions exist or not so as to detect the spectrum purity of the radio frequency device;
Testing the emission spectrum of the radio frequency device at the working frequency thereof by switching to a spectrum analyzer; this can check for the presence of impurity harmonics or spurious emissions and further evaluate the spectral purity of the radio frequency device. Through this test, it is ensured that the emission spectrum of the device meets the prescribed criteria without unnecessary interfering signals.
S5, providing preset input power for the radio frequency device through the signal generator, and monitoring the change condition of the output signal of the radio frequency device so as to evaluate the nonlinear characteristic of the radio frequency device.
It should be noted that the nonlinear characteristics include the capability of processing high-power signals, including intermodulation distortion, harmonic distortion, and the like, which may affect the performance of the radio frequency device and the overall performance of the communication system.
The signal generator is used for providing preset input power for the radio frequency device and then monitoring the change condition of the output signal. In the process, the nonlinear characteristics of the radio frequency device are evaluated, including how to respond to the input of different power levels, and the test is helpful for knowing the stability and the linearity of the radio frequency device under the high-power working condition, and is important for guaranteeing the quality and the reliability of a communication system.
The working principle of the invention is as follows: when in detection, the target performance parameters of the radio frequency device to be detected are determined, the proper connection interface in the test system is determined and the operation parameters of the test system are configured according to the target performance parameters, the radio frequency device is connected into the test system through the specific connection interface, the reflection coefficients of the radio frequency device are measured on a plurality of frequency points by utilizing a network analyzer, and the input and output impedance matching performance of the radio frequency device is estimated; the network analyzer is adjusted to adapt to the working frequency range of the radio frequency device, the transmission coefficient and the reflection coefficient of the radio frequency device are measured, the working performance of the radio frequency device is detected by searching a resonance peak and analyzing the position, the width and the amplitude of the resonance peak, the radio frequency device is switched to the frequency spectrum analyzer, the emission spectrum of the radio frequency device under the working frequency is tested to detect whether impurity harmonic waves or stray emission exist or not, and therefore the spectrum purity of the radio frequency device is evaluated; providing preset input power for the radio frequency device through the signal generator, and monitoring the change condition of an output signal of the radio frequency device to evaluate the nonlinear characteristic of the radio frequency device; compared with the testing technology in the prior art, the performance detection method realizes comprehensive testing from basic impedance matching performance to advanced spectrum purity and nonlinear characteristics by combining the use of a network analyzer and a spectrum analyzer, ensures the omnibearing detection of the performance of the radio frequency device, strengthens logical connection and mutual verification between different performance tests by gradually going deep into the testing process in the running process of the radio frequency device, improves the reliability of the testing result, greatly improves the testing efficiency, and realizes comprehensive and accurate performance evaluation of the radio frequency device.
In this embodiment, it is further explained that step S2 further includes:
S110, after the operation parameter setting of the test system is completed, a baseline test is conducted on the test system, and measurement readings during the baseline test are recorded as reference standards.
The function of the baseline test, which is not only a single check of the test system but also the monitoring and recording of environmental conditions (e.g., temperature, humidity) and the status of the test equipment, is to provide a clear starting point to ensure the reliability of the test results during the test, to ensure the consistency of these factors in subsequent tests.
Before performing a specific rf device performance measurement, a baseline test is performed on the test system in step S110, and the measurement reading at this time is recorded as a reference for a subsequent test. This step is to ensure accuracy and repeatability of the test results, and by comparing the differences between subsequent test readings and baseline readings, the performance variation of the RF device can be more accurately assessed. The baseline test helps identify and eliminate errors that may be introduced by the test system itself, ensuring that the data obtained in the subsequent steps reflects the performance characteristics of the rf device itself.
In this embodiment, it is specifically described that step S2 specifically includes:
S21, the radio frequency device is connected to a testing system through a corresponding connection interface, the testing system starts a network analyzer, and preheating and calibrating operations are carried out on the network analyzer;
firstly, the radio frequency device is safely connected into a test system through a proper connection interface, and a network analyzer is started to carry out necessary preheating and calibration. Preheating means that the instrument is enabled to reach a stable working state so as to eliminate measurement errors caused by unstable performance of the instrument when the instrument is just started. The calibration rule is to adjust the instrument by known standard to ensure the accuracy of the measurement result. This preparation is to ensure the accuracy and repeatability of the test data, and by preheating and calibration, errors that may be introduced by the instrument itself can be minimized.
S22, setting a broad-spectrum test range containing a required measurement frequency band according to the operating frequency and characteristics of the radio frequency device, and measuring a first reflection coefficient by adopting fine-grained frequency points in the broad-spectrum test range;
According to the operating frequency and characteristics of the radio frequency device, a broad-spectrum test range covering a required measurement frequency band is set, and a fine-granularity frequency point is used for measuring a first reflection coefficient in the range. This ensures that the behaviour of the radio frequency device, in particular the subtle variations in the reflection coefficient, within its operating frequency band is fully captured. Among other things, selecting an appropriate test frequency range and fine-grained frequency points can help analyze the performance of a radio frequency device in detail, especially the impedance matching conditions in its critical operating frequency range, which can help accurately assess whether the design and functionality of the device meets expected requirements.
S23, capturing the change of the reflection coefficient by measuring the first reflection coefficient of the radio frequency device under different frequencies, and recording the minimum reflection coefficient value;
the first reflection coefficient of the radio frequency device is measured at the same frequency, and the change of the reflection coefficient, particularly the minimum value, is recorded, so that the impedance matching efficiency of the device at each frequency point can be disclosed, and the identification of the problem area with possible performance is facilitated. By accurately measuring and recording the reflection coefficients of the radio frequency device at different frequency points, the impedance matching performance of the device, particularly the capture of very small reflection coefficient values, can be evaluated, helping to determine at which frequencies the device performs best.
S24, establishing a coordinate graph according to the measured first reflection coefficient and the corresponding frequency value, and performing graphical analysis to evaluate the impedance matching performance of the input and output of the radio frequency device. And when the impedance matching performance is lower than a preset threshold, a production suggestion for optimizing the performance of the radio frequency device is provided.
And establishing a coordinate graph for graphical analysis according to the measured first reflection coefficient and the corresponding frequency value. The visual representation method can more intuitively display the impedance matching performance of the radio frequency device, is convenient for analyzing and understanding the test result, and can evaluate whether the device meets the design requirement. The graphic analysis is a process of visualizing data, trends, modes and abnormal values can be identified more easily through graphic display, and the performance of the device under different frequencies can be visually displayed in the performance evaluation of the radio frequency device, so that engineers can be helped to judge and adjust quickly and accurately.
In this embodiment, it is specifically described that step S3 specifically includes:
S31, according to the specification and the expected working frequency of the radio frequency device, adjusting the scanning frequency range of the network analyzer to the working frequency range of the radio frequency device; in addition to frequency range adjustments, other test related parameters such as power level, scan point density, etc. also need to be reconfigured based on the resonance characteristics and details of the intended analysis to improve test accuracy and efficiency.
The scanning frequency range is adjusted to ensure that the network analyzer is able to cover the entire operating frequency range of the radio frequency device, thereby accurately measuring its performance under expected operating conditions.
S32, calibrating the network analyzer again, and measuring a transmission coefficient and a second reflection coefficient of the radio frequency device in the working frequency range through the adjusted and calibrated network analyzer; and (3) carrying out recalibration operation of the network analyzer, and ensuring the accuracy in measuring the transmission coefficient and the second reflection coefficient of the radio frequency device in the adjusted scanning frequency range.
S33, identifying a resonance peak of the radio frequency device in the working frequency range through the measurement results of the transmission coefficient and the second reflection coefficient. Wherein the resonance peak usually appears graphically as a sharp peak at a specific frequency point, wherein the transmission coefficient shows as a sudden increase in signal strength, and the second reflection coefficient shows as a lowest point at the corresponding frequency, reflecting the lowest reflection loss.
And identifying the resonance peak of the radio frequency device in the working frequency range through the measurement results of the transmission coefficient and the second reflection coefficient. The resonance peak is a key index in the performance analysis of the device, indicates the gain or loss characteristics of the device at certain frequency points, and can evaluate the bandwidth, gain, loss and other key performance parameters of the device.
S34, deeply analyzing the position, width and amplitude of the resonance peak, and identifying the sharpness of the resonance peak so as to evaluate the quality factor of the radio frequency device; the position (frequency), width and amplitude (indicative of signal strength or loss) of each resonance peak are further analyzed. The sharpness of the resonance peak (Q factor) can be assessed by measuring the width to height ratio of the peak, a sharp peak representing a high Q factor, meaning lower energy loss and better frequency selectivity.
The position, width and amplitude of the resonance peak are deeply analyzed, and the sharpness of the resonance peak is recognized to evaluate the quality factor (Q factor) of the radio frequency device. This analysis helps to understand the filter characteristics and frequency response of the device.
And S35, the transmission coefficient, the second reflection coefficient and the quality factor are synthesized, and the overall working performance of the radio frequency device is evaluated.
And (5) evaluating the overall working performance of the radio frequency device by combining the transmission coefficient, the second reflection coefficient and the quality factor. This step integrates the previous measurements, providing a comprehensive performance overview that helps determine whether the device is suitable for its intended application.
Further, the integrated assessment of the operational performance of a radio frequency device requires consideration of a number of parameters including, but not limited to, transmission coefficients, reflection coefficients, and quality factors. This comprehensive evaluation approach can provide a deep understanding of device performance, guiding subsequent design optimization and application deployment.
In this embodiment, it is specifically described that step S4 specifically includes:
s41, disconnecting the radio frequency device from the network analyzer, and switching the test system to a working mode of the spectrum analyzer;
This step transitions from testing of impedance and transmission characteristics to analyzing the emission spectrum of the radio frequency device in preparation for spectral purity detection.
S42, carrying out parameter configuration of a frequency range, a resolution bandwidth and a detection limit on a spectrum analyzer according to the spectrum purity detection requirement of the radio frequency device under the working frequency, wherein the spectrum purity detection requirement comprises a detection range of target harmonic waves and spurious emissions;
and configuring parameters such as a frequency range, a resolution bandwidth, a detection limit and the like for the spectrum analyzer according to the spectrum purity detection requirement of the radio frequency device under the working frequency. Proper setting of these parameters is critical to ensure that the target harmonics and spurious emissions can be accurately captured.
S43, preheating and calibrating the spectrum analyzer after parameter configuration, and starting the spectrum analyzer to perform spectrum scanning on the radio frequency device under preset input power;
Preheating and calibrating the spectrum analyzer after parameter configuration, and then starting the spectrum analyzer to perform spectrum scanning on the radio frequency device under preset input power. This step ensures the accuracy and reliability of the measurement.
S44, identifying unexpected signals of the radio frequency device which exist outside the working frequency according to the result of the frequency spectrum scanning, classifying the unexpected signals, and judging whether impurity harmonic waves or spurious emissions exist or not;
The data collected by the analyzer includes the primary signal (the expected emission of the radio frequency device) and possibly the unintended signal;
Impurity harmonics are emitted as integer multiples of the fundamental frequency (primary signal frequency); spectrally, these signals are typically located at integer multiples of the desired fundamental frequency signal; for example, if the fundamental frequency is 1 GHz, then the second harmonic is at 2 GHz and the third harmonic is at 3 GHz, and so on, the presence of the impurity harmonic may be indicative of the nonlinear behavior of the radio frequency device at high power.
Spurious emissions are any unintended emissions other than harmonics, which may occur at any frequency near or far from the fundamental frequency, and which may originate from nonlinear effects inside the radio frequency device, interference from the power supply line, or emissions from other devices in the test environment.
By examining the frequency location of the undesired signal, it can be determined whether it is a harmonic emission (at integer multiples of the fundamental frequency) or a spurious emission (at random locations), which typically tapers off in intensity with increasing frequency, the intensity of which may not follow this rule.
S45, analyzing the frequency, amplitude and source of each identified unexpected signal, carrying out theorem evaluation according to the analysis result, and comparing the theorem evaluation with the preset requirement of the frequency spectrum purity of the radio frequency device so as to obtain the quality of the frequency spectrum purity of the radio frequency device.
Wherein the total power emitted by the radio frequency device, including the primary signal and all undesired signals, is calculated, and whether this meets a preset power limit (theorem evaluation). The frequency and amplitude of each undesired signal is compared to preset requirements to determine if there are any emissions outside of the allowed range (compared to preset requirements). The magnitude of the impurity harmonics and spurious emissions are analyzed to determine if these unintended emissions are sufficient to interfere with proper operation of the device itself or other equipment.
Analyzing the frequency, amplitude and source of each identified unexpected signal, quantitatively evaluating according to the analysis result, and comparing the analyzed result with the preset requirement of the frequency spectrum purity of the radio frequency device to evaluate the quality of the frequency spectrum purity of the radio frequency device.
Frequency analysis: all signals emitted by the radio-frequency device, including the main signal and any impurity harmonics or spurious emissions, are identified by the data collected by the spectrum analyzer. The frequency of each signal is recorded for further analysis.
Amplitude measurement: the amplitude (typically in dBm) of each identification signal is recorded. Amplitude measurements reflect the strength of the signal and are critical to assess whether the signal exceeds the allowable emission limits.
Evaluation of Signal influence: for each undesired signal (e.g., impurity harmonics and spurious emissions), its frequency and amplitude are analyzed and the potential impact of these signals on the overall performance of the radio frequency device is evaluated. This typically involves comparing the measured value to industry standards or requirements of a particular application.
In this embodiment, it is specifically described that step S5 specifically includes:
s51, disconnecting the radio frequency device from the spectrum analyzer, and switching the test system to a working mode of the signal generator;
Firstly, the radio frequency device needs to be disconnected from the spectrum analyzer connected before, and the test system is switched to the working mode of the signal generator. This step prepares the test environment to ensure that the response of the rf device to input signals of different power levels can be accurately assessed to assess its non-linear characteristics.
S52, setting parameters of output power level, frequency and waveform of the signal generator according to nonlinear characteristic evaluation requirements of the radio frequency device;
in conducting non-linear property tests, the selection of appropriate output power levels, frequencies and waveforms is critical because these parameters directly affect the excitation pattern and response of the rf device. It is further to be explained how these parameters are selected according to the specifications or test guidelines of the radio frequency device, and their respective potential impact on the test results.
S53, preheating and calibrating the signal generator after parameter setting, providing preset input power for the radio frequency device through the signal generator, gradually increasing the input power from a first power value to a second power value, and monitoring the change condition of an output signal of the radio frequency device through receiving equipment corresponding to the signal generator;
Preheating and calibrating the signal generator after parameter setting, and then providing a preset input power for the radio frequency device through the signal generator, wherein the step of increasing the input power from a first power value to a second power value gradually and monitoring the output signal change of the radio frequency device through corresponding receiving equipment is the core for evaluating the nonlinear characteristics. In nonlinear characteristic evaluation, gradually increasing input power and monitoring changes in output signals are critical to identifying the performance of a radio frequency device under different excitation conditions; it is clear how to determine the start and end values of the input power and how to select the step size of the power variation to ensure adequate test coverage and resolution.
S54, recording and analyzing the change condition of the collected output signals, and analyzing the mode and the reason of the nonlinear behavior through a linear analysis unit to quantitatively evaluate the nonlinear response characteristic of the radio frequency device.
The mode and cause of the nonlinear behavior are analyzed by a linear analysis unit, which is aimed at quantitatively evaluating the nonlinear response characteristics of the radio frequency device. Nonlinear analysis is a key to identifying the behavior mode and performance limit of a radio frequency device in the face of different input powers, and by analyzing how the output signal of the radio frequency device changes with the change of the input power, nonlinear characteristics such as generated harmonic waves, intermodulation distortion and the like can be revealed. It may be necessary here to further elucidate how the data processing and analysis is performed with a linear analysis unit, including the software tools used, the analysis method and the evaluation criteria.
In this embodiment, it is further explained that step S5 further includes:
S6, integrating impedance matching performance, working performance, spectrum purity and nonlinear characteristics of the input and output of the radio frequency device, summarizing into a performance detection report of the radio frequency device, and providing an optimization strategy for production and manufacture of the radio frequency device based on the performance detection report.
The proposed optimization strategy should be directed to problem areas identified in the performance detection report, including but not limited to:
1. and (3) design adjustment: such as adjusting the layout, material selection, or circuit design of the rf device to improve impedance matching or reduce nonlinear effects.
2. And (3) optimizing a manufacturing process: aiming at the discovered problems, the production process or the quality control step is adjusted to improve the consistency and the reliability of the device.
3. And (3) performance adjustment: additional tuning or optimization of the rf device is performed to improve its performance in a particular application.
As a preferred solution of the present embodiment, the test system further includes a switching module 70, where the switching module 70 includes a first connection module and a second connection module, and the first connection module is electrically connected to the connection interface; the second connection module is provided with a first contact port electrically connected with the network analyzer, a second contact port electrically connected with the spectrum analyzer and a third contact port electrically connected with the signal generator; the second connecting module is connected to the first connecting module in a sliding manner, so that when the second connecting module slides, any one of the first contact port, the second contact port and the third contact port is connected with the first connecting module.
It should be noted that, the first connection module is used as a fixed interface and is connected with the radio frequency device. The second connection module is in charge of being electrically connected with various test instruments, and fast switching is achieved through a sliding mechanism. The design of the switching module allows for rapid switching between different test devices (network analyzer, spectrum analyzer, signal generator) without the need for manual reconnection of the radio frequency device, reducing test preparation time and operational complexity.
The design of the switching module is particularly suitable for laboratory environments requiring various tests, and particularly in the process of research and development and quality control, the efficiency and the accuracy of the test work can be obviously improved.
Embodiment two:
The invention also provides a performance detection system based on the radio frequency device, which is used for realizing the performance detection method of the radio frequency device according to the first embodiment, and the performance detection system comprises:
the connection module 10 comprises a plurality of connection interfaces for connecting radio frequency devices of different models;
a network analyzer 20 for measuring a first reflection coefficient of the rf device at different frequencies to evaluate impedance matching performance of the rf device input and output; measuring a transmission coefficient and a second reflection coefficient of the radio frequency device in a working frequency range, searching a resonance peak, and analyzing the position, width and amplitude of the resonance peak to detect the working performance of the radio frequency device;
A spectrum analyzer 30 for testing the emission spectrum of the RF device at the operating frequency, checking whether there is impurity harmonic or spurious emission, to detect the spectral purity of the RF device;
a signal generator 40 for providing a preset input power to the RF device, and monitoring the variation of the output signal thereof to evaluate the nonlinear characteristics thereof;
A data acquisition module 50 for acquiring measurement data of the network analyzer, and the signal generator;
the display module 60 is used for displaying the measurement data acquired by the data acquisition module;
And a switching module 70, configured to switch connection between the radio frequency device and any one of the network analyzer, or the signal generator.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (4)
1. A method for detecting performance based on a radio frequency device, comprising:
determining a corresponding connection interface in a test system according to target performance parameters to be detected of the radio frequency device, and setting operation parameters of the test system;
The radio frequency device is connected to the test system through a corresponding connection interface, and the first reflection coefficients of the radio frequency device under different frequencies are measured through a network analyzer so as to evaluate the impedance matching performance of the input and output of the radio frequency device;
adjusting the working frequency range from the network analyzer to the radio frequency device, measuring the transmission coefficient and the second reflection coefficient of the radio frequency device in the working frequency range, searching a resonance peak, and analyzing the position, the width and the amplitude of the resonance peak to detect the working performance of the radio frequency device;
Switching to a spectrum analyzer, testing the emission spectrum of the radio frequency device at the working frequency, and checking whether impurity harmonic waves or spurious emissions exist or not to detect the spectrum purity of the radio frequency device;
Providing preset input power for the radio frequency device through the signal generator, and monitoring the change condition of an output signal of the radio frequency device so as to evaluate the nonlinear characteristic of the radio frequency device;
The radio frequency device is connected to the test system through a corresponding connection interface, and the first reflection coefficients of the radio frequency device under different frequencies are measured through a network analyzer so as to evaluate the impedance matching performance of the input and output of the radio frequency device; the method specifically comprises the following steps:
The radio frequency device is connected to the testing system through a corresponding connection interface, the testing system starts a network analyzer, and preheating and calibrating operations are carried out on the network analyzer;
setting a broad-spectrum test range containing a required measurement frequency band according to the operating frequency and characteristics of the radio frequency device, and measuring a first reflection coefficient by adopting fine-granularity frequency points in the broad-spectrum test range;
Capturing the change of the reflection coefficient by measuring the first reflection coefficient of the radio frequency device under different frequencies, and recording the minimum reflection coefficient value;
Establishing a coordinate graph according to the measured first reflection coefficient and the corresponding frequency value, and performing graphical analysis to evaluate the impedance matching performance of the input and output of the radio frequency device;
The network analyzer is adjusted to a working frequency range, a transmission coefficient and a second reflection coefficient of the radio frequency device in the working frequency range are measured, a resonance peak is found, and the position, the width and the amplitude of the resonance peak are analyzed to detect the working performance of the radio frequency device; the method specifically comprises the following steps:
according to the specification and the expected working frequency of the radio frequency device, the scanning frequency range of the network analyzer is adjusted to the working frequency range of the radio frequency device;
Performing calibration operation on the network analyzer again, and measuring a transmission coefficient and a second reflection coefficient of the radio frequency device in a working frequency range through the adjusted and calibrated network analyzer;
identifying a resonance peak of the radio frequency device in the working frequency range according to the measurement results of the transmission coefficient and the second reflection coefficient;
the identifying the resonance peak of the radio frequency device in the working frequency range further comprises:
Analyzing the position, width and amplitude of the resonance peak, and identifying the sharpness of the resonance peak to evaluate the quality factor of the radio frequency device;
the transmission coefficient, the second reflection coefficient and the quality factor are integrated, and the overall working performance of the radio frequency device is evaluated;
Switching to a spectrum analyzer, testing the emission spectrum of the radio frequency device at the working frequency, and checking whether impurity harmonic waves or spurious emissions exist or not to detect the spectrum purity of the radio frequency device; the method specifically comprises the following steps:
Disconnecting the radio frequency device from the network analyzer, and switching the test system to a working mode of the spectrum analyzer;
According to the spectrum purity detection requirement of the radio frequency device under the working frequency, carrying out parameter configuration of a frequency range, a resolution bandwidth and a detection limit on the spectrum analyzer, wherein the spectrum purity detection requirement comprises a detection range of target harmonic waves and spurious emissions;
preheating and calibrating a spectrum analyzer after parameter configuration, and starting the spectrum analyzer to perform spectrum scanning on the radio frequency device under preset input power;
According to the result of spectrum scanning, identifying unexpected signals of the radio frequency device which exist outside the working frequency, classifying the unexpected signals, and judging whether impurity harmonic waves or spurious emissions exist or not;
Analyzing the frequency, amplitude and source of each identified unexpected signal, carrying out theorem evaluation according to the analysis result, and comparing the theorem evaluation with the preset requirement of the frequency spectrum purity of the radio frequency device to obtain the quality of the frequency spectrum purity of the radio frequency device;
The signal generator is used for providing preset input power for the radio frequency device and monitoring the change condition of an output signal of the radio frequency device so as to evaluate the nonlinear characteristic of the radio frequency device; the method specifically comprises the following steps:
disconnecting the radio frequency device from the spectrum analyzer, and switching a test system to a working mode of the signal generator;
Setting parameters of output power level, frequency and waveform of the signal generator according to nonlinear characteristic evaluation requirements of the radio frequency device;
Preheating and calibrating the signal generator after parameter setting, providing preset input power for the radio frequency device through the signal generator, gradually increasing the input power from a first power value to a second power value, and monitoring the change condition of an output signal of the radio frequency device through receiving equipment corresponding to the signal generator;
Recording and analyzing the variation condition of the collected output signal, and analyzing the mode and the reason of the nonlinear behavior through a linear analysis unit to quantitatively evaluate the nonlinear response characteristic of the radio frequency device;
The test system further comprises a switching module, wherein the switching module comprises a first connecting module and a second connecting module, and the first connecting module is electrically connected with the connecting interface;
The second connection module is provided with a first contact port electrically connected with the network analyzer, a second contact port electrically connected with the spectrum analyzer and a third contact port electrically connected with the signal generator;
The second connecting module is connected to the first connecting module in a sliding manner, so that when the second connecting module slides, any one of the first contact port, the second contact port and the third contact port is connected with the first connecting module.
2. The method for detecting performance based on a radio frequency device according to claim 1, wherein the radio frequency device is connected to the test system through a corresponding connection interface; also included before is:
After the operation parameters of the test system are set, a baseline test is carried out on the test system, and the measurement reading at the time of the baseline test is recorded as a reference standard.
3. The method of claim 1, wherein the monitoring the change in the output signal to evaluate the nonlinear characteristics; and then further comprises:
And integrating the impedance matching performance, the working performance, the spectrum purity and the nonlinear characteristics of the input and output of the radio frequency device, integrating the performance detection report of the radio frequency device, and providing an optimization strategy for the production and the manufacture of the radio frequency device based on the performance detection report.
4. A performance detection system based on a radio frequency device, for implementing the performance detection method based on a radio frequency device according to any one of claims 1 to 3, the performance detection system comprising:
the connection module comprises a plurality of connection interfaces and is used for connecting radio frequency devices of different models;
the network analyzer is used for measuring first reflection coefficients of the radio frequency device under different frequencies so as to evaluate the impedance matching performance of the input and output of the radio frequency device; measuring a transmission coefficient and a second reflection coefficient of the radio frequency device in a working frequency range, searching a resonance peak, and analyzing the position, width and amplitude of the resonance peak to detect the working performance of the radio frequency device;
The spectrum analyzer is used for testing the emission spectrum of the radio frequency device at the working frequency, and checking whether impurity harmonic waves or spurious emissions exist or not so as to detect the spectrum purity of the radio frequency device;
The signal generator is used for providing preset input power for the radio frequency device, and monitoring the change condition of an output signal of the radio frequency device so as to evaluate the nonlinear characteristic of the radio frequency device;
The data acquisition module is used for acquiring measurement data of the network analyzer, the network analyzer and the signal generator;
The display module is used for displaying the measurement data acquired by the data acquisition module;
And the switching module is used for switching the connection between the radio frequency device and any one of the network analyzer, the network analyzer or the signal generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410484446.XA CN118101084B (en) | 2024-04-22 | 2024-04-22 | Performance detection method and system based on radio frequency device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410484446.XA CN118101084B (en) | 2024-04-22 | 2024-04-22 | Performance detection method and system based on radio frequency device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118101084A CN118101084A (en) | 2024-05-28 |
| CN118101084B true CN118101084B (en) | 2024-06-25 |
Family
ID=91160009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410484446.XA Active CN118101084B (en) | 2024-04-22 | 2024-04-22 | Performance detection method and system based on radio frequency device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN118101084B (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103744010B (en) * | 2013-12-26 | 2017-01-18 | 中国电子科技集团公司第三十六研究所 | An automatic testing system and an automatic testing method of a continuous wave radio frequency power amplifier |
| KR101852484B1 (en) * | 2016-10-17 | 2018-04-26 | 한국표준과학연구원 | Electromagnetic Wave Impedance Measuring Apparatus and Calibration Method of Impedance |
| CN110441614B (en) * | 2019-09-03 | 2020-10-16 | 浙江大学 | TE in microwave dielectric test of low-loss material011Method for identifying resonance mode |
-
2024
- 2024-04-22 CN CN202410484446.XA patent/CN118101084B/en active Active
Non-Patent Citations (2)
| Title |
|---|
| 射频元件参数的去嵌入测试方法和等效全波建模;刘博闻;《中国优秀硕士学位论文全文数据库 (信息科技辑)》;20230215;第3章 * |
| 有源器件端口反射系数测量方法分析;张翠翠 等;《太赫兹科学与电子信息学报》;20150425;第267-271页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN118101084A (en) | 2024-05-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102749539B (en) | Fast electromagnetic compatibility test and diagnosis system with quantization electromagnetic interference | |
| CN106886002B (en) | Calibration method of spectrum analyzer | |
| CN104267265A (en) | Evaluating system and method based on radio astronomical instrument device electromagnetic radiation | |
| JP2011520300A (en) | Embedded module receiver noise profile | |
| CN101482603A (en) | Automatic calibration system of frequency spectrum analyzer | |
| JP6505348B1 (en) | Radiation disturbance measurement method and radiation disturbance measurement system | |
| CN105785138A (en) | Frequency-selective electromagnetic radiation monitor | |
| CN105763272A (en) | Self-calibration radio environment testing platform and testing method thereof | |
| CN106533583A (en) | Method and device for rapidly testing 1dB compression point of power amplifier | |
| CN206432996U (en) | Radio-frequency performance of wireless terminal test system | |
| Betta et al. | Influence of Wi-Fi computer interfaces on measurement apparatuses | |
| CN102055535B (en) | Filter device and working method thereof | |
| CN109946638B (en) | Device and method for automatically detecting radiation immunity of electric energy meter based on residence time self-adaption and pulse lamp flicker identification | |
| CN105044587A (en) | Electromagnetic radiation test-based microwave circuit fault diagnosis device and method | |
| CN118101084B (en) | Performance detection method and system based on radio frequency device | |
| CN100468068C (en) | Automatic detecting system and method for mobile phone radiation | |
| CN105425060B (en) | A kind of interference detection method and detecting system of antenna coupling | |
| CN112882070A (en) | Navigation satellite EIRP and stability test system and method | |
| CN116047121A (en) | Multifunctional microwave comprehensive tester | |
| CN110275060B (en) | Radio frequency power relative stability testing circuit and method for quantum precision magnetic detection | |
| CN115032465A (en) | Radiation stray determination method, device and system | |
| CN211579979U (en) | Wi-Fi wireless test system and device | |
| CN112737706B (en) | Test fixture radio frequency calibration system and method | |
| CN108152622B (en) | Interference degree quantitative evaluation method for vehicle-mounted communication system in wave-absorbing darkroom | |
| CN113810129A (en) | 5G NR testing method, device, terminal and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |