| 发明名称 | Filter and duplexer | ||
| 摘要 | A filter includes: a coupled multi-mode acoustic wave filter connected between an input terminal and an output terminal; a first inductor connected between the coupled multi-mode acoustic wave filter and a ground terminal; an acoustic wave resonator, one end of which is connected between the input terminal or the output terminal and the coupled multi-mode acoustic wave filter; and a second inductor connected between another end of the acoustic wave resonator and the ground terminal. | ||
| 申请公布号 | US8988162(B2) | 申请公布日期 | 2015.03.24 |
| 申请号 | US201213666512 | 申请日期 | 2012.11.01 |
| 申请人 | Taiyo Yuden Co., Ltd. | 发明人 | Tsutsumi Jun |
| 分类号 | H03H9/70;H03H9/72;H03H9/54;H03H9/64;H03H9/05;H03H9/58 | 主分类号 | H03H9/70 |
| 代理机构 | Chen Yoshimura LLP | 代理人 | Chen Yoshimura LLP |
| 主权项 | 1. A filter comprising: a coupled multi-mode acoustic wave filter connected between an input terminal and an output terminal; a first inductor connected between the coupled multi-mode acoustic wave filter and a ground terminal; an acoustic wave resonator, one end of which is connected between the input terminal or the output terminal and the coupled multi-mode acoustic wave filter; and a second inductor connected between another end of the acoustic wave resonator and the ground terminal, wherein: the first inductor forms a first attenuation pole at a frequency higher than a passband of the filter; and the acoustic wave resonator and the second inductor form a second attenuation pole at a frequency higher than the first attenuation pole. | ||
| 地址 | Tokyo JP | ||