ANTENNA DUPLEXER

摘要

An antenna duplexer is provided to improve an isolation level between respective terminals in a package by separating a ground pattern of a reception filter from other ground patterns. An antenna duplexer includes a transmission filter(2) and a reception filter(3), which are mounted on a package. The transmission filter is arranged between an antenna terminal and a transmission terminal. The reception filter is arranged between the antenna terminal and the reception terminal. A ground pattern(152) for the reception filter is isolated from other ground patterns(156,157) in the package. The package includes a cavity unit and a sealing unit. The transmission filter and the reception filter are contained in the cavity unit. The sealing unit is connected to the ground pattern for the reception filter.