Patents by Inventor Ulf Henrik Jidhage

Ulf Henrik Jidhage 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).

  • Apparatus and a method relating to antenna systems
    Patent number: 6018320
    Abstract: An antenna system (100) comprises a substantially planar electrically conductive ground plane (102) with an aperture (103), a substantially planar signal feed structure (104) parallel to the ground plane (102) and a substantially planar first dielectric layer (123) between the ground plane and the feed structure (104). The aperture (103) is in a shape of a first slot (105) orthogonally intersecting a second slot (106) at an intersection point (SIP). The feed structure (104) comprises a first feed unit (107) intersecting the second slot (106) asymmetrically with respect to the first slot (105), and a fork shaped second feed unit (108) comprising two feed arms (110,111). The feed arms (110,111) intersect the first slot (105) on either side of the slot intersection point (SIP), symmetrically with respect to the second slot (106).
    Type: Grant
    Filed: April 28, 1998
    Date of Patent: January 25, 2000
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Ulf Henrik Jidhage, Bengt Inge Svensson