Patent ID: 8872600

Claim:
A high frequency circuit module, comprising: a circuit substrate having stacked insulating layers and conductive layers; a high frequency IC that is mounted on the circuit substrate and that performs transmission and reception of a high frequency signal; a power amplifier IC that is mounted on the circuit substrate and that amplifies a transmission signal from the high frequency IC; and a duplexer that separates a transmission signal outputted from the power amplifier IC to an antenna and a reception signal inputted from the antenna to the high frequency IC, wherein the circuit substrate has a first signal wire that sends the transmission signal that has been amplified by the power amplifier IC to the duplexer, a second signal wire that sends an unamplified transmission signal outputted from the high frequency IC to the power amplifier IC, and a third signal wire that sends the reception signal from the duplexer to the high frequency IC, wherein at least one of the first signal wire and the third signal wire is shorter in length than the second signal wire, wherein the circuit substrate includes a core layer that is thicker than other conductive layers and that is a conductive layer functioning as a ground, a ground electrode formed on a bottom surface, a first via conductor for connecting a lower surface of the power amplifier IC to the core layer for heat dissipation, and a second via conductor connecting the ground electrode to the core layer for heat dissipation, wherein the duplexer is embedded in the circuit substrate, and wherein the duplexer is disposed in a penetrating hole or a recess formed in the core layer of the circuit substrate.