Abstract: The present invention provides a multiband antenna (1) comprising: a plane type ground element (11); a plane type “lower” active radiating element (2) including at least one “lower” slot (9); a plane type “upper” active radiating element (3) including at least one “upper” slot (10); a first short circuit element (4) electrically connecting said lower element to said upper element; a second short circuit element (5) also connecting said lower element to said ground element; a primary signal source (7); a “lower” thin sheet (12) of a first dielectric material; and an “upper” thin sheet (13) of a second dielectric material. The antenna also has a third short circuit element (6) electrically connecting said lower element and said ground element, and at least one lower slot and at least one upper slot are radiating slots.

Abstract: The present invention provides a multiband antenna (1) comprising: a plane type ground element (11); a plane type “lower” active radiating element (2) including at least one “lower” slot (9); a plane type “upper” active radiating element (3) including at least one “upper” slot (10); a first short circuit element (4) electrically connecting said lower element to said upper element; a second short circuit element (5) also connecting said lower element to said ground element; a primary signal source (7); a “lower” thin sheet (12) of a first dielectric material; and an “upper” thin sheet (13) of a second dielectric material. The antenna also has a third short circuit element (6) electrically connecting said lower element and said ground element, and at least one lower slot and at least one upper slot are radiating slots.

Abstract: A planar printed-circuited antenna for the transmission and/or reception of microwave signals has a first conductive element or patch substantially parallel to a ground plane, a first dielectric substrate separating the first patch from the ground plane, supply structure for the antenna, and at least one second patch which substantially identical to the first patch. The second patch is superimposed on the first patch and is substantially parallel to the ground plane. A second dielectric substrate separates the first and second patches, and at least one first short-circuit connects the first and second patches to each other. According to the invention, at least one of the first and second patches includes at least one slot.