Patents by Inventor Debraj Kar

Debraj Kar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • RFID antenna device and RFID sensor device
    Patent number: 12124911
    Abstract: An RFID antenna device (10) for emitting and/or receiving circularly polarised electromagnetic radiation, comprising a radiator unit (12) which has a radiator network (14) with multiple at least partially curved radiator portions (16) and an auxiliary antenna (20) which is galvanically isolated from the radiator network (14) and is inductively or capacitively coupled to the radiator network (14), a supply network unit (22) having a power division portion (26) with a device port and having at least one delay portion (28) which is electrically conductively connected to the power division portion (26) and is electrically conductively connected to the radiator portions (16), wherein the auxiliary antenna (20) is centrally located between the radiator portions (16). Further, an RFID sensor device comprising such an RFID antenna device (10).
    Type: Grant
    Filed: December 9, 2022
    Date of Patent: October 22, 2024
    Assignee: BALLUFF GMBH
    Inventors: Debraj Kar, Matthias Hofherr, Fabian Hauser, Daniel Schweizer, Christoph Bauch, Marc Lechler, Thomas Graf
  • RFID antenna device and RFID sensor device
    Publication number: 20230186039
    Abstract: An RFID antenna device (10) for emitting and/or receiving circularly polarised electromagnetic radiation, comprising a radiator unit (12) which has a radiator network (14) with multiple at least partially curved radiator portions (16) and an auxiliary antenna (20) which is galvanically isolated from the radiator network (14) and is inductively or capacitively coupled to the radiator network (14), a supply network unit (22) having a power division portion (26) with a device port and having at least one delay portion (28) which is electrically conductively connected to the power division portion (26) and is electrically conductively connected to the radiator portions (16), wherein the auxiliary antenna (20) is centrally located between the radiator portions (16). Further, an RFID sensor device comprising such an RFID antenna device (10).
    Type: Application
    Filed: December 9, 2022
    Publication date: June 15, 2023
    Inventors: Debraj Kar, Fabian Hauser, Daniel Schweizer, Christoph Bauch, Marc Lechler, Thomas Graf