Disclosed is a laminate including an insulating resin layer and a metallic foil formed in contact with the insulating resin layer. A current limiting layer having an insulating portion and a conductive portion is formed in a free magnetic layer to narrow a sensing current and decrease diffusion of the sensing current. The form factor converter is configured to concurrently connect to the circuit board module and the small form factor transceiver. Then a command generation section 23 generates a fin angle command value \u03b83 for matching the estimated angle of attack \u03b82\u2032 with a target fin angle \u03b81.