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. 20, 2018
Filed:
Jul. 01, 2013
Balluff Gmbh, Neuhausen a. d. F., DE;
Sorin Fericean, Leonberg, DE;
Mark Eberspaecher, Frickenhausen, DE;
Balluff GmbH, Neuhausen a. d. F., DE;
Abstract
A proximity sensor for measuring the distance from an object contains a microwave oscillator providing, as an output signal, a transmission wave emitted toward the object as a free space transmission wave reflected by the object, the object being electrically conductive or having at least one electrically conductive surface, as a free space reflection wave and is received by the proximity sensor as a reflection wave. The reflection coefficient is determined from the transmission and reflection waves and is provided by the proximity sensor as a measure of the distance. The transmission wave is guided in a waveguide as a waveguide transmission wave and is injected into the waveguide with a wave mode which results in the waveguide transmission wave being separated at the aperture at the front end of the waveguide into the free space transmission wave and in the free space transmission wave propagating to the object.