ANTENNA COIL, RESONANT ANTENNA AND CARD TYPE RADIO EQUIPMENT USING IT

摘要

PROBLEM TO BE SOLVED: To provide an antenna coil which secures required antenna operation even in occurrence of a fault such as disconnection or defective connection.

SOLUTION: The antenna coil 1 has a coil main body 10 of a flat air core type and a coil case 20 formed annularly corresponding to the coil main body 10 and having a coil housing part 24 for housing the coil main body 10 formed in a peripheral direction. The coil main body consists of a plurality of unit coils 10a and 10b whose coiling directions and the numbers of turning of which are equal and which are connected in parallel to each other as shown like a pattern in the figure 7.

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