DUAL BAND ANTENNA SYSTEM WITH DIVERSITY

摘要

There is disclosed an antenna device comprising a dielectric substrate (1) with first and second opposed surfaces. A conductive ground plane (2) is formed on a first area of the second surface of the substrate (1), leaving a second area of the second surface blank. At least two conductive feedlines (15, 16) are formed on the first surface of the substrate (1) and, extend from an area corresponding to the first area of the second surface to an area corresponding to the second area of the second surface. Each feedline (15, 16) is provided with a dielectric element (19, 20) in the area corresponding to the second area of the second surface, and at least one slot or discontinuity (23, 24, 25) is formed in the conductive ground plane (2) at an interface (14) between the first and second areas in a region between the feedlines (15, 16). The antenna device displays good dual band operation with good diversity and isolation between the antenna elements.