Skyworks Panasonic Filter Solutions Japan Co., Ltd.

Panasonic Corporation

Skyworks Filter Solutions Japan Co., Ltd.

Sasagawa Co., Ltd.

Hidehito Shimizu

Hiroyuki Nakamura

Takahiro Sato

Tetsuya Tsurunari

Takashi Inoue

Rei Goto

Joji Fujiwara

Tomoya Komatsu

Toru Jibu

Shoji Okamoto

Goods display stand

An acoustic wave element comprising a lithium tantalate substrate having the Euler angles (&#x3c6;, &#x3b8;, &#x3c8;), a first component &#x3c6; satisfying 10&#xb0;&#x2264;&#x3c6;&#x2264;50&#xb0;; and an electrode disposed on the lithium tantalate substrate and configured to excite a main acoustic wave of wavelength &#x3bb;, the electrode having a density &#x3c1;M satisfying &#x3c1;M&#x2265;&#x3c1;Ti where &#x3c1;Ti represents a density of titanium (Ti), and a thickness hM of the electrode satisfies 0.141&#xd7;exp(0.075&#x3c1;M)&#x3bb;&#x2264;hM&#x2264;0.134&#x3bb; Embodiments of the present disclosure minimize a thickness of the electrode and suppress a spurious Rayleigh wave signal.

Acoustic wave elements, antenna duplexers and electronic devices

An object of the present disclosure is to provide an elastic wave resonator having a high Q value, and producing little or no unwanted spurious signals. In order to achieve the object, an elastic wave resonator according to the present disclosure includes a piezoelectric substrate and an IDT electrode. The IDT electrode has an apodization-weighting portion in which a staggered section width decreases toward an end portion of the IDT electrode in an elastic wave propagation direction. The electrode finger pitch of the IDT electrode decreases toward an end portion of the IDT electrode in an end portion, in the elastic wave propagation direction, of a staggered region of the IDT electrode.

Elastic wave resonator including a constant pitch region with a tapering width

The present invention is an acoustic wave device including first and second acoustic wave resonators. A first tilt angle that is an angle formed between a direction perpendicular to a direction in which electrode fingers of the first acoustic wave resonator extend and a direction along which the electrode fingers are arranged is different from a second tilt angle that is an angle formed between a direction perpendicular to a direction in which electrode fingers of the second acoustic wave resonator extend and a direction along which the electrode fingers are arranged.

Acoustic wave device and antenna duplexer employing the same

In a filter module capable of handling multiple bands, cross wiring with an RF-IC is to be solved. The filter module includes: an antenna terminal; first and second transmission filters; first and second reception filters; a first switch circuit connected to the antenna terminal, and selectively connected to the first and second transmission filters; a second switch circuit connected to the antenna terminal, and selectively connected to the first and second reception filters; a first matching circuit connected between the first switch circuit and the first transmission filter or between the second switch circuit and the first reception filter; and a second matching circuit connected between the first switch circuit and the second transmission filter or between the second switch circuit and the second reception filter.

Filter module

An acoustic wave device includes a piezoelectric substrate, an interdigital transducer (IDT) electrode, a reflector electrode, and a dummy electrode. The IDT electrode includes electrode fingers extending in a predetermined direction. The reflector electrode faces the IDT electrode across a gap. The dummy electrode is situated on a straight line extending in the predetermined direction through the gap. At least one of the distance between the dummy electrode and the IDT electrode and the distance between the dummy electrode and the reflector electrode is larger than the distance between the IDT electrode and the reflector electrode. This acoustic wave device prevents a short circuit between the IDT electrode and the reflector electrode, thereby avoiding a decrease in its yield.

Acoustic wave device

Growing community of inventors

Osaka, Japan

Hidehito Shimizu