Abstract: A vehicle body-embedded antenna device basically includes a plate-like antenna element, a circuit board and a fixed conductive part. The plate-like antenna element is disposed inside the bathtub-shaped part at the highest possible level therein so as to be substantially parallel to the metal body surface. The circuit board is disposed inside the bathtub-shaped part so as not to overlap the plate-like antenna element as viewed from above. The circuit board has a feeding part connected with the plate-like antenna element. The fixed conductive part is electrically conductive to both the circuit board and the bathtub-shaped part. The fixed conductive part is fixed to a bottom part of the bathtub-shaped part through an attachment hole formed in the bottom part of the bathtub-shaped part.

Abstract: A vehicle body-embedded antenna device basically includes a plate-like antenna element, a circuit board and a fixed conductive part. The plate-like antenna element is disposed inside the bathtub-shaped part at the highest possible level therein so as to be substantially parallel to the metal body surface. The circuit board is disposed inside the bathtub-shaped part so as not to overlap the plate-like antenna element as viewed from above. The circuit board has a feeding part connected with the plate-like antenna element. The fixed conductive part is electrically conductive to both the circuit board and the bathtub-shaped part. The fixed conductive part is fixed to a bottom part of the bathtub-shaped part through an attachment hole formed in the bottom part of the bathtub-shaped part.

Abstract: A low profile antenna device for use in a vehicle comprises a base unit, and an antenna unit. The antenna unit is supported on the base unit, and is provided with a first helical unit on the side near to the base unit, and a second helical unit on the side far from the base unit. The second helical unit is configured such that the surface area is larger per unit length than that of the first helical unit.

Abstract: A low profile antenna device for use in a vehicle comprises a base unit, and an antenna unit. The antenna unit is supported on the base unit, and is provided with a first helical unit on the side near to the base unit, and a second helical unit on the side far from the base unit. The second helical unit is configured such that the surface area is larger per unit length than that of the first helical unit.