1.It is constituted by a microstrip-fed planar Y-shaped monopole, printed on a FR4 substrate of thickness h = 1.6 mm and relative dielectric permittivity e. = 4.4. The antenna has compact size of 13x20 mm2. In the simulation, an infinite substrate has been
considered, while the finite metallic screen under the microstrip feeding line is set to 50x20 mm2.