Advanced multilevel antenna for motor vehicles

An antenna for a motor vehicle comprising:

• a) a transparent window coated with an optically transparent conducting layer in at least one side of the layers composing the transparent window,
• b) at least a multilevel structure supported by said conducting layer, being said multilevel structure composed by a set of polygonal elements of the same class (the same number of sides), preferably triangles or squares, being such polygonal elements electromagnetically coupled either by means of an ohmic contact or a capacitive or inductive coupling mechanism, wherein the contact region between at least the 75% of said polygonal elements is always longer than 5% and shorter than a 50% of the perimeters of said polygonal structures.
• c) A two-conductor feeding transmission line, wherein at least one of the conductors of said transmission line is coupled to the inner conducting layer enclosed in one of the polygonal elements composing said multilevel structure, by means of either an ohmic contact or a capacitive or inductive coupling mechanism.
• and wherein the antenna features a similar impedance at the feeding poing and a similar horizontal radiation pattern in at least three bands, wherein at least two of said three frequencies are selected from the following:
• FM (80 MHz˜110 MHz), DAB (205 MHz˜230 MHz), Tetra (350 MHz˜450 MHz), DVB (470 MHz˜862 MHz), GSM900/AMPS (820 MHz˜970 MHz), GSM1800/DCS/PCS/DECT (1700 MHz˜1950 MHz), UMTS (1920 MHz˜2200 MHz ), Bluetooth (2500 MHz) and WLAN (4.5 GHz˜6 GHz) such that said antenna can be operated simultaneously at any of the telecommunication services within said bands.