The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 31, 2021
Filed:
Mar. 31, 2021
University of Electronic Science and Technology of China, Chengdu, CN;
UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA, Chengdu, CN;
Abstract
A time-domain segmented calibration method for a characteristic impedance of a time-domain reflectometer is provided. The method first segments the measured characteristic impedance value according to the reflection coefficients ρ, determines several boundary points with the reflection coefficients, and divides the range of the measured impedance according to the impedance values corresponding to the reflection coefficients of the boundary points, and then select a typical impedance value in the range as a reference impedance for calibration. The TDR instrument performs characteristic impedance calibration for each typical reference impedance value one by one, and stores them as calibration parameters of different groups. With respect to different impedance value ranges, the selection ranges of the calibration and measurement areas of TDR are different. When the measurement is performed, the 50Ω calibration parameter is used as the default reference for calculation.