Patents by Inventor Lars Torstensson

Lars Torstensson 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).

  • Microstrip antenna having a metal frame for control of an antenna lobe
    Patent number: 6023244
    Abstract: A device for and/or comprised in antennas, in particular microwave antennas such as microstrip antennas, for controlling the antenna lobe and completely or partially suppressing cross-coupling between the polarizations in dual-polarized antenna elements. A metal frame, the sides of which can be angled for a desired lobe width, is positioned around each antenna element on top of the ground plane of the antenna. The shape and positioning of the metal frame around the antenna element also control the antenna lobe. In this way, the antenna lobe can be controlled in the desired manner irrespective of the size of the ground plane of the antenna, which depends, for example, on a desired microstrip distribution network for the antenna.
    Type: Grant
    Filed: February 13, 1998
    Date of Patent: February 8, 2000
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Goran Snygg, Christer Lindqvist, Lars Torstensson
  • Dual polarized selective elements for beamwidth control
    Patent number: 5959588
    Abstract: A dual polarized antenna comprises at least one radiating element and a ground plane. The ground plane is, at least partly, provided with a side wall. At least one polarization selective element is provided between the radiating element and the side wall to transmit one of the polarizations and to determine the radiation pattern of the other polarization.
    Type: Grant
    Filed: January 8, 1997
    Date of Patent: September 28, 1999
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Bjorn Johannisson, Peter Svedhem, Lars Torstensson