SHAPE DEFORMATION FLEXIBLE ANTENNA LOOP COIL INCLUDING SOLID DEFORMATION TO WHICH TRANSPONDER FUNCTION IS ATTACHED

摘要

PROBLEM TO BE SOLVED: To provide a loop coil antenna which includes one transponder and in which the number of turns is reduced and a wire rod bundle is made thin, in which deformation and flexibility is consequently achieved, and which is deformed according to inside/outside form faces of an identification object to form a plurality of loop faces and performs accurate reading from many side directions.;SOLUTION: This transponder-side antenna loop coil (L1) 1 constitutes a resonance circuit by a matching coil (L2)3 and a capacitor (Cr)4. The number of turns of the antenna loop coil L1 is reduced and a shape can easily be deformed as a result. In a relation of L1 and L2 which constitute a resonance circuit inductance, a high magnetic core is used for L2 and distributed to a high inductance. The L1 inductance is distributed to about 10% value of the L2 inductance and minimized. Thus, L2 is made to have a high inductance mainly for resonance coil, L1 is for excitation and step-up and they form the resonance circuit with Cr.;COPYRIGHT: (C)2006,JPO&NCIPI