Laminated coil, impedance conversion circuit, and communication-terminal device

摘要

A first coil conductor (LP1) and a second coil conductor (LP2) are formed on different substrate layers of a laminate comprising a plurality of substrate layers laminated together. Interlayer-connection conductors (V11, V12) form interlayer connections between the first coil conductor (LP1) and the second coil conductor (LP2). In a planar view in the lamination direction of the laminate, the area (AP1) enclosed by the first coil conductor (LP1) and the area (AP2) enclosed by the second coil conductor (LP2) overlap. The first coil conductor (LP1) and the second coil conductor (LP2) are connected at two or more points via the interlayer-connection conductors (V11, V12). This creates a parallel-connected section comprising a first section (L11) of the first coil conductor (LP1) and a first section (L21) of the second coil conductor (LP2) and creates series-connected sections consisting of a second section (L12) of the first coil conductor (LP1) and a second section (L22) of the second coil conductor (LP2).