What is the difference in measurement accuracy between a scalar network analyzer and a vector network analyzer?

维立信测试仪器

What is the difference in measurement accuracy between a scalar network analyzer and a vector network analyzer? [Copy link]

The differences in measurement accuracy between scalar network analyzers and vector network analyzers are mainly reflected in the following aspects:

1. Differences in measurement parameters : Scalar network analyzers mainly measure amplitude information but cannot measure phase information, which limits their accuracy in measurements that require phase information. In contrast, vector network analyzers can measure both amplitude and phase, providing a more comprehensive analysis of network characteristics.

2. Dynamic range : Vector network analyzers typically have a wider dynamic range, capable of measuring a wider range of signal strengths, which is important for accurate measurements.

3. Calibration process : Vector network analyzers can perform more complex calibration processes, including amplitude and phase calibration, to improve measurement accuracy, while scalar network analyzers have a relatively simple calibration process, mainly performing amplitude calibration.

4. Error correction : Scalar network analyzers may be affected by systematic errors during measurement, and error analysis and correction models are needed to improve measurement accuracy. Removing systematic errors through numerical analysis methods can reduce random errors and improve the accuracy of measurement results.

5. Measurement uncertainty : Since vector network analyzers can measure phase, they can more accurately determine the complex impedance and phase delay characteristics of a device, thereby reducing measurement uncertainty.

6. Measurement speed : Scalar network analyzers may provide faster measurement speeds in some cases due to their simplified structure and measurement principles, but this is at the expense of some measurement accuracy.

7. Adaptability to specific applications : In some specific applications, such as measurements that only require amplitude information, a scalar network analyzer may be sufficient, but in high-frequency measurements that require more comprehensive parameters, a vector network analyzer is more appropriate.

In summary, vector network analyzers are generally superior to scalar network analyzers in terms of measurement accuracy, especially in complex measurements that require amplitude and phase information. However, scalar network analyzers may be more suitable in terms of cost, ease of operation, and specific applications.

1350774640

1. But in high-frequency measurements that require more comprehensive parameters, a vector network analyzer is more appropriate.

In summary, vector network analyzers are generally superior to scalar network analyzers in terms of measurement accuracy, especially in complex measurements that require amplitude and phase information. However, scalar network analyzers may be more suitable in terms of cost, ease of operation, and in specific applications.

laocheng

There are probably not many standard network products now. Standard network is suitable for occasions with single function and low test cost, such as only measuring standing wave