To provide a surface acoustic wave device that improves both out-band attenuation adjacent to a pass band and that on more high-frequency side outside the pass band, and to provide a communication apparatus.
A first reference potential through conductor 17 is formed right under the first region of a ring electrode 12, and a second reference potential through conductor 18 is formed right under the second region of the ring electrode 12. The reference potential bus bar electrode of a second IDT electrode 2 is connected to a region which is a predetermined distance away from the first region 25 of the ring electrode 12, and the reference potential bus bar electrode of a fourth IDT electrode 4 is connected to a region which is a predetermined distance away from the second region 26 of the ring electrode 12.
NAKAI TAKESHI
JP2003008389A | 2003-01-10 | |||
JP2004235908A | 2004-08-19 | |||
JP2004153580A | 2004-05-27 | |||
JP2004135092A | 2004-04-30 | |||
JP2006066978A | 2006-03-09 | |||
JP2006014096A | 2006-01-12 | |||
JP2006180334A | 2006-07-06 |
Next Patent: NETWORK DIVERSITY SYSTEM, DIVERSITY DEVICE, AND HANDOVER METHOD