Vehicular antenna device

A vehicular antenna installed in a vehicle, the vehicular antenna comprising:

• a substrate;
• a dipole-type radiation pattern disposed on a first surface of the substrate and configured to transmit or receive a radio signal;
• and
• a coupling pattern disposed on a second surface opposite to the first surface of the substrate and electromagnetically coupled to the dipole-type radiation pattern,
• wherein the dipole-type radiation pattern includes first and second radiation patterns spatially spaced apart from each other,
• wherein each of the first and second radiation patterns includes:
• a first radiation region having a first area,
• a second radiation region having a second area smaller than the first area, and
• a third radiation region having one end in contact with the first radiation region and another end in contact with the second radiation region,
• a feeding point disposed on the first radiation region of the first radiation pattern, and
• a ground point disposed on the first radiation region of the second radiation pattern,
• wherein the coupling pattern is disposed to overlap portions of the first and second radiation patterns and not to overlap at least a portion of the first radiation region of each of the first and second radiation patterns in a thickness direction of the substrate,
• wherein the first radiation region of the first radiation pattern and the first radiation region of the second radiation pattern, the second radiation region of the first radiation pattern and the second radiation region of the second radiation pattern, and the third radiation region of the first radiation pattern and the third radiation region of the second radiation pattern are spatially spaced apart from each other, and
• wherein a distance between the second radiation region of the first radiation pattern and the second radiation region of the second radiation pattern is greater than a distance between the first radiation region of the first radiation pattern and the first radiation region of the second radiation pattern.