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:
May. 21, 2019
Filed:
Nov. 14, 2014
Endress + Hauser Gmbh + Co. KG, Maulburg, DE;
Rolf Gluth, Neu-Ulm, DE;
Winfried Mayer, Buch, DE;
ENDRESS+HAUSER SE+CO.KG, Maulburg, DE;
Abstract
The invention relates to a frequency generator for generating two pulse repetition frequency signals with slightly different frequencies for a radar measuring device. The frequency generator comprises an oscillator, which generates an oscillator signal, a first signal path for generating a first pulse repetition frequency signal from the oscillator signal, and a second signal path for generating a second pulse repetition frequency signal from the oscillator signal. The first signal path comprises a frequency divider or a first DDS module which is designed to generate a first frequency signal on the basis of the oscillator signal, a first mixer which is designed to upmix the first frequency signal or a signal derived therefrom to an intermediate frequency band and to generate a first intermediate frequency signal, and a first ceramic bandpass filter which is designed to filter out a selected frequency component of the first intermediate frequency signal and to generate a bandpass-filtered first intermediate frequency signal. The second signal path comprises a second DDS component which is designed to generate a second frequency signal on the basis of the oscillator signal, said second frequency signal differing from the first frequency signal by a specified frequency offset, a second mixer which is designed to upmix the second frequency signal or a signal derived therefrom to an intermediate frequency band and to generate a second intermediate frequency signal, and a second ceramic bandpass filter which is designed to filter out a selected frequency component of the second intermediate frequency signal and to generate a bandpass-filtered second intermediate frequency signal.