Loop antenna device

A loop antenna device comprising:

• a first antenna including a first resonant circuit comprised by a first coil and a first condenser connected to the first coil;
• a second antenna including a second resonant circuit comprised by a second coil wound in a direction perpendicular to a wound direction of the first coil on the outside of the first antenna, a link coil wound in the same wound direction of the first coil and connected to the second coil, and a second condenser connected to the link coil;
• a case made of a conductor accommodating the first antenna and the second antenna, and
• an electromagnetic wave absorbing member absorbing the magnetic field generated toward the outside surface of the vehicle and disposed between the case and at least one of the first coil and the second coil, wherein said electromagnetic absorbing member is selected from a group consisting of Fe—Si—Al alloy and polyethylene thermoplastic elastomer, Mn/Zn ferrite and Ethylene Propylene copolymer Ethylene propylene diene terpolymer, and Mn/Mg/Zn ferrite and soft poly-vinyl chloride.

A loop antenna device comprising:

• a first antenna including a first coil for generating a first magnetic field;
• a second antenna including a second coil for generating a second magnetic field such that an axis of the first magnetic field and an axis of the second magnetic field cross in an orthogonal manner to each other;
• a link coil extending from one end of the second coil;
• a case made of a conductor accommodating the first antenna and the second antenna;
• and
• an electromagnetic wave absorbing member absorbing the magnetic field generated toward the outside surface of the vehicle and disposed between the case and at least one of the first antenna and the second antenna, wherein said electromagnetic absorbing member is selected from a group consisting of Fe—Si—Al alloy and polyethylene thermoplastic elastomer, Mn/Zn ferrite and Ethylene Propylene copolymer Ethylene propylene diene terpolymer, and Mn/Mg/Zn ferrite and soft poly-vinyl chloride.