公开(公告)号：US20190286963A1

公开(公告)日：2019-09-19

申请号：US16271028

申请日：2019-02-08

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Mohsen Salehi ,  Benjamin Münstermann ,  Zohaib Hameed

IPC: G06K19/077 ,  G06K19/07 ,  H03H7/38 ,  F01D5/12 ,  F03D80/00 ,  G01R27/26 ,  H01Q1/22 ,  H01Q1/38

Abstract: Ultra-high frequency (UHF) antenna tags are described. The antenna tag includes a sensor portion including terminals for attaching a chip and an antenna portion including first and second elements electrically connected to the sensor portion. At least one of the first and second elements includes at least one meandered portion. The sensor portion is responsive to a presence of a dielectric or magnetic material. The antenna tag is configured such that the antenna tag has an input impedance at the terminals substantially matched to a chip impedance. In some embodiments, the antenna tag has a directivity of at least 4 dBi in a predetermined direction and a radiation efficiency of at least 60 percent.

公开(公告)号：US20230258590A1

公开(公告)日：2023-08-17

申请号：US18015784

申请日：2021-07-14

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Benjamin Münstermann ,  Knut Schumacher ,  Günter Zilligen ,  Martin Stottmeister ,  Robert Bialluch ,  Michael Bahners ,  Thomas Keller ,  Peter Orda ,  Jörg Hahn ,  Harald Westkamp ,  Andreas Backes ,  Waleri Wischnepolski ,  David Rudek

IPC: G01N27/10 ,  G01N27/07 ,  G01N27/22

CPC classification number: G01N27/10 ,  G01N27/07 ,  G01N27/226

Abstract: Sensored mixer, comprising a mixing device for mixing two or more components to produce a mixed liquid at a mixer output, and a property sensor for determining a property of a liquid, the property sensor comprising a) a channel comprising a sensing zone through which the liquid flows; b) two electrodes for generating an electric field of one or more sensing frequencies in the sensing zone; c) a data storage device comprising a pre-stored set of calibration data representing calibration impedance responses measured previously at the one or more sensing frequencies and at different property values of the property of an identical liquid; and d) a device to repeatedly i) generate between the electrodes an electric field of in the sensing zone; ii) sense between the electrodes, a response impedance; iii) derive from the response impedance a property value of the property of the liquid, using the pre-stored set of calibration data representing calibration impedance responses, wherein the property sensor is in fluid communication with the mixer output such that the mixed liquid can flow from the mixer output through the sensing zone. A method for sensing a property of the liquid and a data set of calibration data representing calibration impedance responses usable with the sensor and the method are also disclosed.