Method of calibrating a setup

US11428770B2 · kind B2 · utility

Assignee

• Rohde & Schwarz GmbH & Co. KG · DE

Inventors

• Jan-Patrick Schultheis · Munich, DE
• Werner Held · Pöcking, DE

Key dates

• Filing date: Mar 30, 2020
• Grant date: Aug 30, 2022
• Expiry date: Oct 6, 2040

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F17/12
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method of calibrating a setup comprises: performing at least one calibration of the setup, thereby obtaining calibration data; setting a quantity representing forward tracking to be equal with a quantity representing reverse tracking; solving a system of equations having at least an unknown quantity representing the forward tracking or the reverse tracking, thereby obtaining at least one equation having the unknown quantity squared; creating based on the calibration data obtained two phase over frequency relationships for the respective quantity; determining two lines having a linear change in phase over frequency for the phase over frequency relationships created; extrapolating the lines determined to a frequency of 0 Hz; and determining the respective quantity by selecting one line of the lines extrapolated that is closer to a phase of zero, 2π or a multiple thereof at the frequency of 0 Hz.