A varying magnetic field excites slight vibrations in an object and a radar sensor
detects the vibrations at a harmonic of the excitation frequency. The synergy of
the magnetic excitation and radar detection provides increased detection range
compared to conventional magnetic metal detectors. The radar rejects background
clutter by responding only to reflecting objects that are vibrating at a harmonic
excitation field, thereby significantly improving detection reliability. As an
exemplary arrangement, an ultra-wideband micropower impulse radar (MIR) is capable
of being employed to provide superior materials penetration while providing range
information. The magneto-radar may be applied to pre-screening magnetic resonance
imaging (MRI) patients, landmine detection and finding hidden treasures.
