Miniaturised two-layer slit-patch structure for decoupling printed antennas

A miniaturised double-layer slit-patch structure is introduced for decoupling two closely spaced co-planar waveguide-fed printed monopoles with a common ground. The double-layer structure consists of a slit etched on the common ground between the antennas and a conducting dipole element printed on a very thin dielectric film separating the two layers. Simulated results of the antennas´ performance as well as measurements of fabricated prototypes are presented.