A Method of Automatically Compensating the Variation Error of Network Analyzer's Measuring Surface

A network analyzer, automatic compensation technology, applied in the field of testing, can solve the problems of not considering the amplitude-frequency response, unable to calibrate, cumbersome and other problems

Active Publication Date: 2016-06-29
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When the measurement calibration plane changes, the traditional method is to remove the influence by recalibration or only remove the influence of phase change without considering the amplitude-frequency response
Not only is recalibration cumbersome but it may not be possible to calibrate because the newly inserted connector cannot be connected to common calibration parts

Method used

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  • A Method of Automatically Compensating the Variation Error of Network Analyzer's Measuring Surface

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Embodiment 1

[0026] The return loss curve of the reflection measurement after the port calibration of the ideal vector network analyzer is a curve at 0dB; at this time, the measurement reference plane is at the connection of the calibration piece. When changing by subtracting the DUT adapter, etc., the reflection measurement curve shows a curve that is not near 0dB, indicating that the delay and loss on the measurement path have changed. When the addition and subtraction components are coaxial or waveguide with constant impedance, the transmission of the signal shows the skin effect, and the delay and loss changes are only related to the frequency and the phase is linear. At this time, the automatic compensation and fitting algorithm for the change of the measurement surface is called to calculate the compensation formula, which will be stored and corrected during the measurement.

[0027] The return loss curve after changing the measurement surface of the network analyzer shows a slope or...

Embodiment 2

[0030] On the basis of the above-described embodiments, the present invention provides a method for automatically compensating the error of the network analyzer measurement surface variation, which includes the following steps:

[0031] Step 1: Calibrate the network analyzer or call the calibration status;

[0032] Step 2: change the measuring surface, and send the measuring surface automatic compensation order;

[0033] Step 3: Call the automatic compensation and fitting algorithm of the measurement surface, obtain the fitting curve parameters and calculate the compensation data;

[0034] Step 4: Store parameters and compensation data.

[0035] The method for measuring surface variation error, wherein, the specific method of the third step is:

[0036] Step 301: Establish reflection measurement of the compensation port without connecting the DUT;

[0037] Step 302: read the return loss measurement value of the current reflection measurement as calibration data;

[0038] S...

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Abstract

The invention provides a method for automatically compensating the error of the measurement surface change of a network analyzer, step 1: calibrate the network analyzer or call the calibration state; step 2: change the measurement surface, and send a measurement surface automatic compensation command; step 3: call the measurement surface to automatically Compensation fitting algorithm, obtain fitting curve parameters and calculate compensation data; Step 4: store parameters and compensation data. Using the above scheme, the calibration compensation algorithm is realized by using the curve fitting method, and the error introduced by the change of the measurement reference surface can be removed without user intervention. The obtained compensation data is simple to calculate and fast to run, improving the user's measurement efficiency.

Description

technical field [0001] The invention belongs to the technical field of testing, and in particular relates to a method for automatically compensating the measurement surface variation error of a network analyzer. Background technique [0002] There are many types of calibration for vector network analyzers, such as single-port reflection calibration, full two-port calibration, TRL calibration and other calibration techniques. Their common feature is that users need to connect precision calibration parts, and then extract error coefficients through software algorithms. Finally, the correction process is applied to the analyzer measurement data to obtain the calibrated data. The advantage of traditional calibration is that it is accurate, but the disadvantage is that special calibration parts are required, and the user needs to connect the calibration parts multiple times and wait for the calibration process to complete, which is usually complicated and slow. Many times, after...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R35/00
Inventor 刘丹李树彪郭永瑞李明太赵立军
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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