Antenna device for vehicle

An antenna device for a vehicle, comprising:

• an antenna board;
• and
• a colinear array antenna provided in the antenna board, wherein
• the colinear array antenna is constructed by a conductor pattern provided on each of both surfaces of a dielectric substrate, the colinear array antenna including:
• a first straight portion;
• a second straight portion;
• a first connection portion one end of which is connected to the first strati lit portion;
• and
• a second connection portion one end of which is electrically connected to the first connection portion and another end of which is connected to the second straight portion,
• wherein the first straight portion and the first connection portion are provided on a first surface of the dielectric substrate,
• wherein the second straight portion and the second connection portion are provided on a second surface of the dielectric substrate opposite to the first surface, and
• wherein the first connection portion and the second connection portion constitute one turn for phase matching.

An antenna device for a vehicle, comprising:

• an antenna board;
• and
• a colinear array antenna provided in the antenna board, wherein
• the colinear array antenna is constructed by a conductor pattern provided on each of both surfaces of a dielectric substrate, the colinear array antenna including:
• a first straight portion;
• a second straight portion;
• a first connection portion one end of which is connected to the first straight portion;
• and
• a second connection portion one end of which is electrically connected to the first connection portion and another end of which is connected to the second straight portion,
• wherein the first straight portion and the first connection portion are provided on a first surface of the dielectric substrate,
• wherein the second straight portion and the second connection portion are provided on a second surface of the dielectric substrate opposite to the first surface, and
• wherein at least one of a first director that is parallel with the first straight portion and a second director that is parallel with the second straight portion is provided on the dielectric substrate.