Patent ID: 8525515

Claim:
An explosive/illicit drug detection device comprising a mean for generating a high-frequency pulse; an antenna coil that irradiates an inspection object with the generated high-frequency pulse, input through matching means having a cross diode and a variable capacitor, as a radio wave and receives a nuclear quadrupole signal sent out of the inspection object excited by the radio wave; and a detection mean for detecting an explosive and/or an illicit drug hidden in the inspection object based on the received nuclear quadrupole signal, wherein the antenna coil is formed by winding a high-frequency coaxial cable in the form of a FIG. 8 so that two solenoidal coil portions are provided on the same plane with the coil portions wound more than once in mutually opposite directions, a recessed portion being provided at the high-frequency coaxial cable connecting the two solenoidal coil portions, and is used so that it is opposed to inspection objects.