| 摘要 |
PROBLEM TO BE SOLVED: To provide a miniaturized delay line improved in planarity in group delay time and having satisfactory frequency characteristics. SOLUTION: A delay line 1 has one coil divided into four inductors L1 to L4 and LCπtype low-pass filters of four stages, composed of these inductors L1 to L4 and capacitors C1 to C5 are built into a laminate. The inductors L1 to L4 are formed by respectively serially connecting coil conductor patterns L1a to L4d arranged into a matrix shape on insulated sheets 24 to 27. The winding directions of the adjacent inductors L1 to L4 are set so as to be mutually opposite. As a material for the insulated sheets 21 to 31, a nonmagnetic material having a specific inductive capacity 15 or lower is used.
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