发明名称 |
Surface acoustic wave filter device |
摘要 |
<p>The filter elements (101,102) with the terminals connected to a common unbalanced and the balanced terminals (121-123) respectively are arranged such that the total electrostatic capacitance of the interdigital transducers (IDTs) (111-116) of one element is greater than that of another element. An independent claim is included for communication device.</p> |
申请公布号 |
EP1249933(A2) |
申请公布日期 |
2002.10.16 |
申请号 |
EP20020290698 |
申请日期 |
2002.03.20 |
申请人 |
MURATA MANUFACTURING CO., LTD. |
发明人 |
YOICHI, SAWADA;YUICHI, TAKAMINE |
分类号 |
H03H9/145;H03H9/00;H03H9/25;H03H9/64;(IPC1-7):H03H9/64 |
主分类号 |
H03H9/145 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|