Time frame measuring method with calibration in the frequency range

US9823281B2 · kind B2 · utility

Assignee

• Rosenberger Hochfrequenztechnik GmbH & Co. KG · DE

Inventors

• Gunnar Armbrecht · Raubling, DE
• Christian Zietz · Lippstadt, DE

Key dates

• Filing date: Mar 7, 2013
• Grant date: Nov 21, 2017
• Expiry date: Jun 18, 2034

Classification

• Technology area (CPC G): Physics
• CPC primary: G01R35/005
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method for determining electric voltage u(t) and/or electric current i(t) of an RF signal in the time domain in a calibration plane, wherein by at least one directional coupler having two outputs and one signal input a first component of a first RF signal that runs from the signal input in the direction of the calibration plane, and a second component of a second RF signal that runs from the calibration plane in the direction of the signal input is decoupled. For a two-port error of the directional coupler, the error terms e00, e01, e10 and e11, are determined as a function of a frequency f and the signal values v1(t) and v2(t) are transformed into the frequency domain as wave quantities V1(f) and V2(f), and absolute wave quantities a1 and b1 in the frequency domain in the calibration plane are calculated from the wave quantities V1(f) and V2(f) by the error terms e00, e01, e10 and e11.