Balanced acoustic wave filter device
申请(专利)号： US20050570371
专利号： US7528683B2 主分类号： H03H9/00
申请权利人： TERUHISA
SHIBAHARA; SEIICHI TAKAHARA 公开国代码： US 优先权国家： JP
摘 要：
A surface acoustic wave filter device
includes an unbalanced terminal, first and second balanced terminals, and first, second and third IDTs. One end of the first IDT and one end of the third IDT are connected to the unbalanced terminal. The second IDT includes first and second divided IDT portions obtained by dividing the IDT in the surface wave propagating direction. The first and second divided IDT portions include sub-divided IDT portions and sub-divided IDT portions obtained by dividing the first and second divided IDT portions and in the crossing width direction. The first and second divided IDT portions are electrically
connected in series. The first and second sub-divided IDT portions are electrically connected in series. The first and second sub-divided IDT portions are electrically connected in series. The second sub-
申请日： 2005-07-01 公开公告日： 2009-05-05
分类号： H03H9/00;
H03H9/25; H03H9/42
发明设计人： SEIICHI TAKAHARA;
TERUHISA SHIBAHARA 申请国代码： US
优先权： 20041220 JP 2004-368244;
20050128 JP 2005-021623
摘 要 附 图：
divided IDT portion is connected to the first balanced terminal and the second sub-divided IDT portion is connected to the second balanced terminal. 主权项：
1. A balanced acoustic wave filter device having an unbalanced terminal and first and second balance
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Balanced acoustic wave filter device
