Compact multiband antenna

摘要

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.