Patents by Inventor Per Sjöstrand

Per Sjöstrand 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).

  • Repeater jamming transmitter and casing for the same
    Patent number: 6384765
    Abstract: This invention concerns a repeater jamming transmitter (2), and a casing arrangement with repeater jamming transmitter. The repeater jamming transmitter (2) comprises transmitter antenna (7), receiver antenna (8) and electronics part (10) with amplifier and control circuits. In order to avoid self-oscillation caused by leakage between the transmitter antenna (7) and the receiver antenna (8) and to maintain the isolation a special connection arrangement (7,8,10) is included in the repeater jamming transmitter. By means of the connection arrangement the amplification of the repeater jamming transmitter can be increased without self-oscillation arising.
    Type: Grant
    Filed: November 5, 1999
    Date of Patent: May 7, 2002
    Assignee: Celsiustech Electronics AB
    Inventors: Per Sjöstrand, Jan Grabs, Alf Näsvall
  • Antenna arrangement and a method in connection with the antenna arrangement
    Patent number: 6297783
    Abstract: An antenna device for emitting and/or receiving electromagnetic radiation, such as radar radiation in a car radar apparatus is provided. Sweeping is realized by means of a fixed feeder and a rotatable reflector. The reflector is driven by a drive motor and its motion is monitored by a tachometer. The drive motor and the tachometer are constituted by so-called flag motors which are mutually motionally coupled to each other by mechanical means.
    Type: Grant
    Filed: August 24, 2000
    Date of Patent: October 2, 2001
    Assignee: Celsiustech Electronics AB
    Inventors: Ingemar Bäck, Ola Forslund, Joakim Olofsson, Per Sjöstrand