| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a miniaturized branching filter device with stabilized characteristics by arranging one phase matching circuit over at least two layers. SOLUTION: Concerning the branching filter device using two surface acoustic wave(SAW) filters having different band center frequencies, a circuit for phase matching for matching the phases of two SAW filters is formed from line patterns, at least one line pattern is formed while being divided over the plural inner layers of a multi-layer package, and the forms of the line patterns formed over adjacent layers are different at least.</p> |
