Patent ID: 8072292

Claim:
A high-frequency module comprising: a circuit board; and a demultiplexer mounted on the circuit board, the demultiplexer including an antenna terminal, a transmitting side signal terminal, first and second balanced signal terminals defining a receiving side signal terminal, a transmitting side filter connected between the antenna terminal and the transmitting side signal terminal, and a receiving side filter connected between the antenna terminal and each of the first and second balanced signal terminals, the receiving side filter being arranged to perform a balanced-unbalanced conversion function; wherein the circuit board includes a first principal surface on which the demultiplexer is mounted and a second principal surface that faces the first principal surface; the first principal surface includes a first front surface side electrode pad to which the antenna terminal is connected, a second front surface side electrode pad to which the transmitting side signal terminal is connected, a third front surface side electrode pad to which the first balanced signal terminal is connected, and a fourth front surface side electrode pad to which the second balanced signal terminal is connected provided thereon; the second principal surface includes a first back surface side electrode pad connected to the first front surface side electrode pad, a second back surface side electrode pad connected to the second front surface side electrode pad, a third back surface side electrode pad connected to the third front surface side electrode pad, and a fourth back surface side electrode pad connected to the fourth front surface side electrode pad provided thereon; a distance from either the antenna terminal or the transmitting side signal terminal to the first balanced signal terminal is greater than a distance from either the antenna terminal or transmitting side signal terminal to the second balanced signal terminal; and a distance from either the first or second back surface side electrode pads to the third back surface side electrode pad is less than a distance from either the first or second back surface side electrode pads to the fourth back surface side electrode pad.