| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a duplexer that has high power withstanding performance.SOLUTION: According to the present invention, the duplexer includes a substrate 40, a transmission filter 26b mounted on the substrate 40, and a reception filter 26a mounted on the substrate 40, and the transmission filter 26b has a piezoelectric substrate 62 formed of a stoichiometric composition of lithium tantalate or lithium niobate, and an IDT 63a disposed on a surface of the piezoelectric substrate 62. The present invention can provide a duplexer having high power withstanding performance.</p> |
