Patent ID: 9608596
Date: 2017-03-28
CPC Classifications: H03H

Claim:
1. An acoustic wave device comprising: a first longitudinally-coupled acoustic wave filter including a first input port, a first output port, a second output port, a first interdigital transducer (IDT) electrode having a first comb-shaped electrode connected to the first input port, a second IDT electrode having a second comb-shaped electrode connected to the first output port, and a third IDT electrode having a third comb-shaped electrode connected to the second output port, the first longitudinally-coupled acoustic wave filter being configured to excite and propagate a first acoustic wave in a first propagation direction, the first IDT electrode being positioned between the second and third IDT electrodes along the first propagation direction, and the first and second comb-shaped electrodes being in an in-phase relation; a second longitudinally-coupled acoustic wave filter including a second input port, a third output port, a third input port, a fourth IDT electrode having a fourth comb-shaped electrode connected to the second input port, a fifth IDT electrode having a fifth comb-shaped electrode connected to the third output port, and a sixth IDT electrode having a sixth comb-shaped electrode connected to the third input port, the second longitudinally-coupled acoustic wave filter configured to excite and propagate a second acoustic wave in a second propagation direction, the fourth IDT electrode being positioned between the fifth and sixth IDT electrodes along the second propagation direction, and the fourth and fifth comb-shaped electrodes being in an anti-phase relation; a first one-port resonator connected between the first output port of the first longitudinally-coupled acoustic wave filter and the second input port of the second longitudinally-coupled acoustic wave filter; and a second one-port resonator connected between the second output port of the first longitudinally-coupled acoustic wave filter and the third input port of the second longitudinally-coupled acoustic wave filter.