Method of calibrating a measurement and analyzing device as well as method of measuring a frequency-converting device under test

US11054450B2 · kind B2 · utility

Assignee

• Rohde & Schwarz GmbH & Co. KG · DE

Inventors

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

Key dates

• Filing date: Jul 17, 2019
• Grant date: Jul 6, 2021
• Expiry date: Jan 26, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03D2200/0045
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method of calibrating a measurement and analyzing device for measuring a frequency-converting device under test, comprises the steps of connecting a first port of the measurement and analyzing device with a radio frequency port assigned to the frequency-converting device under test as well as connecting a second port of the measurement and analyzing device with an intermediate frequency port assigned to the frequency-converting device under test. Further, a scalar-mixer calibration is performed at the radio frequency port and the intermediate frequency port, thus providing a precise calibration conversion amplitude. A relative calibration is performed between the radio frequency port and the intermediate frequency port by using a calibration mixer. At least one correction coefficient is determined by the difference between the results obtained from the scalar-mixer calibration and the relative calibration. The at least one correction coefficient is used to correct an error term applied.