ELASTIC WAVE RESONATOR, ELASTIC WAVE FILTER APPARATUS, AND DUPLEXER

摘要

In an elastic wave resonator, a first IDT electrode, a second IDT electrode, a first reflector, and a second reflector are located on a piezoelectric substrate. The first IDT electrode and the second IDT electrode share a shared bus bar. Between a first terminal and a second terminal, the first IDT electrode and the second IDT electrode are connected in parallel. The shared bus bar and the first reflector are connected to the first terminal. A first bus bar and a second bus bar are connected to the second reflector, and are further connected to the second terminal.

主权项

1. An elastic wave resonator comprising:
a first terminal; a second terminal; a piezoelectric substrate; a first IDT electrode and a second IDT electrode located on the piezoelectric substrate; and a first reflector and a second reflector, one of which is disposed on a first side of a region where the first IDT electrode and the second IDT electrode are located in an elastic wave propagation direction, the other one of which is disposed on a second side of the region in the elastic wave propagation direction, and which are shared by the first IDT electrode and the second IDT electrode; the first IDT electrode including a first bus bar and a shared bus bar disposed apart from the first bus bar; the second IDT electrode including the shared bus bar shared with the first IDT electrode and a second bus bar disposed apart from the shared bus bar; the first bus bar is disposed across the shared bus bar from the second bus bar; the shared bus bar is electrically connected to the first reflector and connected to the first terminal; the second reflector is electrically connected to the first bus bar and the second bus bar and is connected to the second terminal; the first IDT electrode and the second IDT electrode are electrically connected in parallel between the first terminal and the second terminal.