Taiyo Yuden Co., Ltd.

Yasushi Kuroda

Akira Moriya

Satoru Ono

An acoustic wave device includes: a piezoelectric substrate; at least five IDTs (InterDigital Transducers) arranged on the substrate in directions of SAW (Surface Acoustic Wave) propagation; and two balanced terminals connected to two first IDTs that are two out of the at least five IDTs and are 180 degrees out of phase. One of a pair of comb electrodes of one of the two first IDTs is connected to one of the two balanced terminals, and one of a pair of comb electrodes of the other one of the two first IDTs being connected to the other one of the two balanced terminals. The other comb electrodes of the two first IDTs are connected in series, and one of a pair of comb electrodes that form an IDT that is included in the at least five IDTs and is not connected to the two first IDTs is grounded.

Acoustic wave device and system

An acoustic wave filter includes: a first acoustic wave filter having a first group of multimode filters connected, a first unbalanced input node and two first balanced output nodes, a first multimode filter among the first group of multimode filters being connected to the two first balanced output nodes; and a second acoustic wave filter having a second group of multimode filters, a second unbalanced input node and two second balanced output nodes, a second multimode filter among the second group of multimode filters having an aperture length different from that of the first multimode filter and a connection with the two second balanced output nodes, the first and second multimode filters having different pass bands. One of the two first balanced output nodes and one of the two second balanced output nodes are unified, and the other first balanced output node and the other second balanced output node are unified.

Growing community of inventors

Yokohama, Japan

Yasushi Kuroda