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External device and method for improving measurement and calibration precision of microwave network

An external device and calibration accuracy technology, which is applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve problems affecting measurement accuracy, improve measurement and calibration accuracy, and achieve the effect of repeated calibration

Pending Publication Date: 2020-12-08
CHINA ELECTRONIS TECH INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In view of the problems existing in the prior art that affect the measurement accuracy, the first purpose of the present invention is to provide an external device that improves the measurement and calibration accuracy of microwave networks

Method used

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  • External device and method for improving measurement and calibration precision of microwave network
  • External device and method for improving measurement and calibration precision of microwave network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] combine figure 1 An external device for improving the measurement and calibration accuracy of a microwave network, including a control circuit and a calibration data storage unit, a temperature detection circuit, a directional coupling bridge unit, a broadband microwave electronic synchronous switch unit and an automatic single-port electronic calibration unit.

[0059] The control circuit and the calibration data storage unit are respectively connected with the temperature detection circuit, the broadband microwave electronic synchronous switch unit and the automatic single-port electronic calibration unit.

[0060] The directional coupling bridge unit is connected with the broadband microwave electronic synchronous switch unit, the broadband microwave electronic synchronous switch unit is connected with the automatic single-port electronic calibration unit, and the broadband microwave electronic synchronous switch unit is connected with a test port.

[0061] The direc...

Embodiment 2

[0074] combine figure 2 , a method for improving the accuracy of microwave network measurement and calibration, using an external device for improving the accuracy of microwave network measurement and calibration described in Embodiment 1, there are two external devices, and the two external devices are respectively the first The external device and the second external device, the first external device and the second external device are all connected to the vector network analyzer, and can perform full dual-port calibration and measurement functions. The specific connection structure is:

[0075] The vector network analyzer is provided with a first port and a second port, the vector network analyzer has a first receiver A and a second receiver B, and the first port passes through the first test cable W 1 It is connected with the coupling input port of the first external device, and the first receiver A passes through the first flexible radio frequency cable W A Connect with ...

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Abstract

The invention provides an external device and method for improving microwave network measurement and calibration precision. The device comprises a control circuit, a calibration data storage unit, a temperature detection circuit, a directional coupling bridge unit, a broadband microwave electronic synchronous switch unit and an automatic single-port electronic calibration unit. The control circuitand the calibration data storage unit are respectively connected with the temperature detection circuit, the broadband microwave electronic synchronous switch unit and the automatic single-port electronic calibration unit. The directional coupling bridge unit is connected with the broadband microwave electronic synchronous switch unit, and the broadband microwave electronic synchronous switch unit is connected with the automatic single-port electronic calibration unit and the test port. Measurement errors caused by factors such as temperature drift and repeated connection of test cables or other intermediate equipment forming a test channel in the test process of the vector network analyzer can be eliminated or reduced in real time according to measurement requirements, and the device andthe method are an effective means for improving the measurement precision of the vector network analyzer.

Description

technical field [0001] The invention relates to the technical field of microwave testing, in particular to an external device and method suitable for vector network analyzers and improving the accuracy of microwave network measurement and calibration. Background technique [0002] The vector network analyzer is the main instrument for testing microwave network parameters. The device under test can only be tested after being calibrated by the calibration part. There are three main sources of measurement error: systematic error, drift error and random error. [0003] The measured data of the DUT is composed of four aspects: the real parameters of the DUT + systematic error + drift error + random error. The system error is removed through the calibration of the calibration parts. The drift error depends on the inherent temperature drift characteristics of the hardware itself and the environmental conditions, so it is difficult to remove. For example, the measurement cables co...

Claims

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Application Information

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IPC IPC(8): G01R35/00
CPCG01R35/005Y02D30/70
Inventor 王尊峰郭敏马景芳杨保国年夫顺许春卿李文军梁胜利张庆龙姜信诚
Owner CHINA ELECTRONIS TECH INSTR CO LTD
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