Surface acoustic wave apparatus

Details Surface acoustic wave apparatus Surface acoustic wave apparatus

H - Electricity

03

H

H03H 9/02 (2006.01) H03H 9/25 (2006.01)

Patent

CA 2193012

A surface acoustic wave apparatus has a laminated ceramic substrate in which a phase unit is disposed inside of the laminated ceramic substrate. A surface acoustic wave device is secured to the laminated ceramic substrate. The phase unit is configured by forming a first ground electrode above a signal line and a second ground electrode below the signal line in the laminated ceramic substrate. The laminated ceramic substrate is made from a low-permittivity ceramic having a relative dielectric constant of about 7 or less.

ppareil à ondes acoustiques de surface à substrat céramique feuilleté, comportant un couple de disjoncteurs disposé dans le substrat céramique feuilleté. Un dispositif à ondes acoustiques de surface est fixé au substrat céramique feuilleté. Pour implanter le couple de disjoncteurs, une première électrode de masse est formée au-dessus de la ligne de signal et une seconde électrode de masse est formée sous la ligne de signal, dans le substrat céramique feuilleté. Le substrat céramique feuilleté est constitué d'une céramique à faible permittivité, dont la constante diélectrique relative est de l'ordre de 7 ou moins.

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