Antenna provided with an assembly of filtering materials

Antenna comprising at least one probe (10) capable of transforming electrical energy into electromagnetic energy and vice versa, characterised in that it further comprises an assembly (20) of elements made of at least two materials differing in their permittivity and/or permeability and/or conductivity, within which said probe is arranged, the arrangement of the elements in said assembly ensuring radiation, and spatial and frequency filtering of the electromagnetic waves produced or received by said probe, said filtering allowing in particular one or more operating frequencies (f) of the antenna within a frequency band gap, and in that it further comprises a planar reflector of electromagnetic waves (30;

• 30a) supporting said probe and placed in contact with said assembly of elements and in that the antenna comprises a metal plate forming the planar reflector (30a) on which is arranged the probe (10;
• 10a), said metal plate being in contact with a first flat layer of material of a given permittivity, permeability and conductivity, the thickness e1 of said first flat layer being given by the equation e1˜0.5 (λ/{square root over (εrμr)}), said first layer itself being in contact with a succession of flat layers of materials (23a, 23b, 24a) differing in their permittivity and/or permeability and/or conductivity, the thickness e of each of said flat layers being given by the equation e1˜0.25 (λ/{square root over (εr μr)}), where λ is the wavelength corresponding to the operating frequency (f) of the antenna wanted by the user, εr and μr being, respectively, the relative permittivity and the relative permeability of the material of the flat layer in question.