| 发明名称 | Elastic wave filter device and duplexer | ||
| 摘要 | In an elastic wave filter device, an elastic wave filter element chip is mounted on a board. In the elastic wave filter element chip, a ladder filter including a plurality of series arm resonators and a plurality of parallel arm resonators are provided. In/on the board, a first inductor connected in parallel to the series arm resonator and a second inductor connected between the parallel arm resonators P1-P3 and a ground potential are provided. In/on the board, a shield electrode is located between the first inductor and the second inductor. | ||
| 申请公布号 | US9455682(B2) | 申请公布日期 | 2016.09.27 |
| 申请号 | US201514615503 | 申请日期 | 2015.02.06 |
| 申请人 | MURATA MANUFACTURING CO., LTD. | 发明人 | Kuzushita Takuma;Taniguchi Yasumasa;Miyake Takashi |
| 分类号 | H03H9/72;H03H9/64;H03H9/05;H03H9/54;H03H9/70;H03H9/24;H03H9/25;H03H9/56;H03H9/60;H03H7/46;H03H1/00 | 主分类号 | H03H9/72 |
| 代理机构 | Keating & Bennett, LLP | 代理人 | Keating & Bennett, LLP |
| 主权项 | 1. An elastic wave filter device comprising: a board; and an elastic wave element chip mounted on the board; wherein the elastic wave element chip defines a ladder filter including a plurality of series arm resonators arranged on a series arm connecting an input terminal and an output terminal and a plurality of parallel arm resonators arranged on respective parallel arms connecting the series arm and a ground potential; and a first inductor, a second inductor, and a shield electrode are provided in/on the board, the first inductor being connected in parallel to the at least one series arm resonator, the second inductor being connected between at least one of the parallel arm resonators and the ground potential, the shield electrode being located between the first inductor and the second inductor. | ||
| 地址 | Kyoto JP | ||