Patent ID: 7138746

Claim:
A surface acoustic wave apparatus comprising: a package having external terminals; a first surface acoustic wave filter including signal terminals and having relatively low pass-band frequencies; and a second surface acoustic wave filter including signal terminals and having relatively high pass-band frequencies; wherein the first and second surface acoustic wave filters are integrated into the package; one signal, terminal of each of the first and second surface acoustic wave filters is connected to a common terminal; the signal terminals, disposed at the common terminal sides, of the respective first and second surface acoustic wave filters are connected to different external terminals of the package through different paths that are isolated from each other, and each of the signal terminals is connected by a signal line of an external circuit; the first and second surface acoustic wave filters are connected to the common terminal through a transmission line outside the package; the common terminal and the transmission line define a coupling section located outside of the package such that the common terminal and the transmission line are spaced outwardly away from a side surface of the package; and a matching device is connected in parallel to the first and second surface acoustic wave filters, at the coupling section located outside of and spaced away from the package.