Antenna device

An antenna device, comprising:

• a first antenna, comprising:
• a first insulating layer;
• a first signal-feeding line, the first signal-feeding line disposed on a first surface of the first insulating layer;
• and
• two first grounding lines, the two first grounding lines disposed on a second surface of the first insulating layer, wherein the first surface and the second surface of the first insulating layer are parallel with one another;
• a second antenna, comprising:
• a second insulating layer;
• a second signal-feeding line, the second signal-feeding line disposed on a first surface of the second insulating layer;
• and
• two second grounding lines, the two second grounding lines disposed on a second surface of the second insulating layer, wherein the first surface and the second surface of the second insulating layer are parallel with one another;
• and
• a circuit board;
• wherein the first insulating layer and the second insulating layer are arranged orthogonal to one another, the first antenna and the second antenna are disposed on a first surface of the circuit board, and the first axis and the second axis are parallel with one another;
• wherein the first insulating layer, the second insulating layer and the circuit board are each arranged orthogonal to one another.