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:
Nov. 13, 2001
Filed:
Feb. 25, 2000
Applicant:
Inventors:
Patric Heide, Neubiberg, DE;
Martin Nalezinski, München, DE;
Assignee:
Siemens Aktiengesselschaft, Munich, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S 1/334 ; G01S 7/35 ;
U.S. Cl.
CPC ...
G01S 1/334 ; G01S 7/35 ;
Abstract
An FMCW sensor in which a transmission signal is generated from a high frequency of a fixed frequency oscillator and a modulated, low frequency of a second oscillator. The modulated frequency is processed in a delay line with a surface wave component to form a reference signal. A transmission mixer with a hybrid coupler having a 90° phase difference and terminated by diodes is employed in a transmission/reception means. A measured signal from the transmission mixer together with the reference signal is interpreted in an evaluation means.