公开(公告)号：US08138858B1

公开(公告)日：2012-03-20

申请号：US12260703

申请日：2008-10-29

申请人： Jayanti Jaganatha Rao ,  Aleh Loseu ,  Kevin J. Gamble

发明人： Jayanti Jaganatha Rao ,  Aleh Loseu ,  Kevin J. Gamble

IPC分类号： H03H9/64

CPC分类号： H03H9/6459 ,  H03H9/02913 ,  H03H9/64

摘要： The present invention relates to dual-mode SAW devices (DMSDs), which may allow for clean layouts of SAW device elements and provide low impedance with reduced insertion loss, and may increase broadband rejection by improving parasitic characteristics. In one embodiment of the present invention, a parallel set of DMSDs is cascaded with another parallel set of DMSDs. Internal connections between the four DMSDs may be electrically floating, which may further improve parasitic characteristics. With electrically floating internal connections, the parallel set of DMSDs may share a common grating structure, thereby reducing the size and complexity of a DMSD, which may further improve parasitic characteristics. The DMSDs may be used in radio frequency (RF) applications, such as SAW filters.

摘要翻译： 本发明涉及双模SAW器件（DMSD），其可以允许SAW器件元件的清洁布局并且提供具有降低的插入损耗的低阻抗，并且可以通过改善寄生特性来增加宽带抑制。 在本发明的一个实施例中，并行的一组DMSD与另一个并行的一组DMSD级联。 四个DMSD之间的内部连接可以是电浮动的，这可进一步改善寄生特性。 通过电浮动内部连接，DMSD的并行组可以共享公共的光栅结构，从而减小DMSD的尺寸和复杂性，这可以进一步改善寄生特性。 DMSD可用于射频（RF）应用中，例如SAW滤波器。