Wideband antenna disposed in vehicle

An antenna system for a vehicle that comprises a conductive vehicle body operating as an electrical ground, the antenna system comprising:

• glass constituting a window of the vehicle;
• a dielectric substrate attached to the glass;
• a radiator region configured as conductive patterns on the dielectric substrate and configured to radiate a radio signal,
• wherein the conductive patterns of the radiator region are formed on the dielectric substrate as a metal mesh grid having a plurality of openings;
• a plurality of dummy mesh grid patterns formed at an outside portion of the conductive patterns of the radiator region,
• wherein the conductive patterns comprise:
• a first conductive pattern that includes a first portion and a second portion electrically connected with a feeding portion;
• a second conductive pattern electrically connected with an electrical ground;
• and
• a third conductive pattern electrically connected with the electrical ground,
• wherein a size of the second conductive pattern is smaller than a size of the third conductive pattern,
• wherein, upon installation in the vehicle, the radiator region comprises a first region that is beneath a second region that is beneath a third region in a vertical direction,
• wherein the second portion of the first conductive pattern is disposed between the second conductive pattern and a first portion of the third conductive pattern in a horizontal direction of the first region;
• wherein the first portion of the first conductive pattern and a second portion of the third conductive pattern is disposed in the second region,
• wherein a third portion of the third conductive pattern disposed in the third region comprises a first sub region, a second sub region and a third sub region,
• wherein the second portion of the first conductive pattern is disposed between the second conductive pattern and the first sub region of the third portion of the third conductive pattern in the vertical direction,
• wherein the second sub region of the third portion of the third conductive pattern is disposed between the first sub region of the third portion of the third conductive pattern and the third sub region of the third portion of the third conductive pattern,
• wherein the second sub region of the third portion of the third conductive pattern is connected with the second portion of the third conductive pattern,
• wherein a height of the third sub region of the third portion of the third conductive pattern is smaller than a height of the second sub region of the third portion of the third conductive pattern, and
• wherein the third sub region of the third portion of the third conductive pattern is disposed near the plurality of dummy mesh grid patterns in the vertical direction.