Patent ID: 6809692
Filing Date: 2004-10-26
Classification: H01Q

Abstract:
An antenna for a motor vehicle comprising:a) a transparent window coated with an optically transparent conducting layer on at least one side of the transparent window, b) at least one multilevel structure supported by said transparent conducting layer, said at least one multilevel structure composed of a set of polygonal elements having the same number of sides and being electromagnetically coupled either by ohmic contact or a capacitive or inductive coupling mechanism, wherein the contact region between at least 75% of said polygonal elements is between 5% and 50% of the perimeters of said polygonal elements, c) a two-conductor feeding transmission line, connected to said antenna at a feeding point, wherein the antenna features a similar impedance at the feeding point and a similar horizontal radiation pattern in at least three bands, and wherein at least two of said three bands are selected from the group consisting of: 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 with said bands.