Loop antenna attached to rear window of vehicle

A loop antenna mounted on a sheet of glass equipped with a defogger comprised of a plurality of electrical heating wires bridging it in a horizontal direction, provided with:

• an antenna element provided with a bottom and two sides provided at said two sides of this bottom and extending vertically with respect to said bottom in said same direction and arranged in a polygonal shape with at least four sides to form a loop and
• two power feed terminals of said loop antenna provided at a position a predetermined distance from said bottom,
• a distance between said power feed terminals and said bottom being formed larger than a distance between adjoining electrical heating wires,
• said loop antenna able to be mounted on said glass sheet in a state with said sides perpendicularly intersecting said electrical heating wires.

A loop antenna mounted on a sheet of glass equipped with a defogger comprised of a plurality of electrical heating wires bridging it in a horizontal direction, provided with:

• a plurality of loop antennas each having a polygonal loop having one side of an antenna element as a bottom and all having said bottoms arranged in parallel,
• two straight elements parallel to a line vertical to a midpoint of said bottom and connecting adjoining loop antennas, and
• at least one power feed terminal provided at each of said two sides of said line vertical to said bottom,
• a total length of an antenna element forming each said loop antenna being formed to a length equivalent to one wavelength of a frequency which said loop antenna sends and receives, a maximum value of a distance from said bottom to another antenna element separated in said vertical direction being smaller than a distance between said electrical heating wires, and said loop antenna able to be mounted to said glass sheet in a state with said straight elements perpendicularly intersecting said electrical heating wires.