Patent ID: 8558641

Claim:
A high-frequency module comprising: a multilayer substrate; a duplexer mounted on the multilayer substrate and including a common terminal and a plurality of individual terminals connected to the common terminal through different filters; and a matching circuit mounted on the multilayer substrate or defined by an electrode pattern included in the multilayer substrate and being connected to the common terminal of the duplexer; wherein the multilayer substrate includes: an individual-terminal-side wiring electrode defined by an electrode pattern provided on a layer of the multilayer substrate; a common-terminal-side wiring electrode defined by an electrode pattern provided on a different layer of the multilayer substrate from that of the individual-terminal- side wiring electrode; and first and second ground electrodes provided on different layers between the layer including the common-terminal-side wiring electrode and the layer including the individual-terminal-side wiring electrode in a lamination direction of the layers; one of the first and second ground electrodes is arranged so as to overlap the individual-terminal-side wiring electrode but not the common-terminal-side wiring electrode in the lamination direction; and the other of the first and second ground electrodes is arranged to overlap both of the individual-terminal side wiring electrode and the common-terminal-side wiring electrode in the lamination direction.