BRANCHING FILTER WHICH CONTAINS A PIEZOELECTRIC THIN-FILM FILTER HAVING A PIEZOELECTRIC THIN-FILM RESONATOR OR A SURFACE ACOUSTIC WAVE FILTER HAVING A SURFACE ACOUSTIC WAVE RESONATOR, AND A COMBINATION MODULE

摘要

PURPOSE: A branching filter and a combination module are provided to perform stably operations by restraining the electromagnetic field interference. CONSTITUTION: A transmission band filter and a reception band filter are installed in an inner part of a package(2). A conductive lid(17) is used for sealing the package. The package is mounted on a mounting substrate(4) having an antenna terminal and is covered with a conductive shield(5). The conductive shield is mounted on the mounting substrate. One or more ground terminals of the transmission band filter and the reception band filter are connected to the lid. The lid is electrically connected to the shield via a connecting member(6). The ground terminals of the transmission band filter and the reception band filter are electrically connected to a ground terminal(7) of the mounting substrate.