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:
Mar. 17, 2015
Filed:
Jan. 15, 2010
Thilo Bednorz, Erding, DE;
Steffen Neidhardt, Lengenfeld, DE;
Thilo Bednorz, Erding, DE;
Steffen Neidhardt, Lengenfeld, DE;
Rohde & Schwarz GmbH & Co., KG, Munich, DE;
Abstract
A network analyzer for measuring a group delay time, which is caused by a device under test to be measured, generates an excitation signal comprising two signals (x(t),x(t)) spaced by a frequency difference, excites the device with the excitation signal and measures a response signal comprising two signals (x(t),x(t)), which are respectively phase distorted by the device relative to the signals (x(t),x(t)) of the excitation signal. It determines the phase difference (Δφ) between the signals (x(t),x(t)) associated with the excitation signal and a phase difference (Δφ) between the signals (x(t), x(t)) associated with the response signal. Finally, it calculates the group delay time from the phase difference (Δφ) of the signals (x(t),x(t)) associated with the excitation signal, the phase difference (Δφ) of the signals (x(t),x(t) associated with the response signal and the frequency difference.