Patent ID: 7796091
Filing Date: 2010-09-14
Classification: H01F,H01Q

Abstract:
1. A receiving device provided with a three-axis antenna, the three-axis antenna comprising: a cross-shaped core having a pair of X-axis arms projecting in an X-axis direction and a pair of Y-axis arms projecting in a Y-axis direction orthogonal to the X-axis direction in an orthogonal coordinate system, the X-axis arms comprising head sections, and the Y-axis arms comprising head sections; X-axis winding wire wound about the X-axis arms; Y-axis winding wire wound about the Y-axis arms; Z-axis winding wire enclosing the cross-shaped core outside the head sections of the X-axis arms and the head sections of the Y-axis arms and so as to cover surfaces of the head sections of the X-axis arms and of the Y-axis arms of the cross-shaped core; a first amplifier connected to first and second terminals that are electrically connected to a winding origin and to a winding terminus of the X-axis winding wire, respectively; a second amplifier connected to third and fourth terminals that are electrically connected to a winding origin and to a winding terminus of the Y-axis winding wire, respectively; a third amplifier connected to fifth and sixth terminals that are electrically connected to a winding origin and to a winding terminus of the Z-axis winding wire, respectively; and a reception selection circuit to receive signals output from any of the first to third amplifiers, wherein seventh and eighth terminals that are electrically connected to center taps of the X-axis winding wire and of the Y-axis winding wire, respectively, and the fifth terminal connected to the winding origin of the Z-axis winding wire are grounded.