A position detection system for locating an object including a magnetic
field generator is disclosed. The position detection system also includes
an array of parallel conductors responsive to a magnetic field generated
by the magnetic field generator and a plurality of receivers each
associated with a parallel conductor. The parallel conductors are spaced
apart from one another by a substantially constant spacing. Each receiver
has an associated gain, and the gains of the receivers are configured to
simulate voltages induced in conductor loops of sinusoidally-varying
pitch.