The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 2000
Filed:
Apr. 28, 1998
Ulf Henrik Jidhage, Alings.ang.s, SE;
Bengt Inge Svensson, Molndal, SE;
Telefonaktiebolaget LM Ericsson, Stockholm, SE;
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). When used as a transmitting antenna, a first signal (Si) is fed through the first feed unit (107) and a second signal (S2) is fed through the second feed unit (108) to respective associated slot (105,106). The signals (S1,S2) excite the aperture (103) to radiate two substantially orthogonal linearly polarized signals.