Patent ID: 7471930

Claim:
A high frequency module comprising: an antenna terminal connected to an antenna; a first reception signal terminal for outputting a first reception signal that is a reception signal in a first frequency band; a second reception signal terminal for outputting a second reception signal that is a reception signal in a second frequency band higher than the first frequency band; a first transmission signal terminal for receiving a first transmission signal that is a transmission signal in the first frequency band; a second transmission signal terminal for receiving a second transmission signal that is a transmission signal in the second frequency band; a switch circuit connected to the antenna terminal; a first diplexer directly or indirectly connected to the first and second reception signal terminals and the switch circuit; a second diplexer directly or indirectly connected to the first and second transmission signal terminals and the switch circuit; and a substrate for integrating the foregoing components, wherein: the switch circuit connects one of the first and second diplexers to the antenna terminal; the first diplexer incorporates: a first band-pass filter for reception that allows the first reception signal received at the antenna terminal and passing through the switch circuit to pass and sends the same to the first reception signal terminal; and a second band-pass filter for reception that allows the second reception signal received at the antenna terminal and passing through the switch circuit to pass and sends the same to the second reception signal terminal; the second diplexer incorporates: a first band-pass filter for transmission that allows the first transmission signal received at the first transmission signal terminal to pass and sends the same to the switch circuit; and a second band-pass filter for transmission that allows the second transmission signal received at the second transmission signal terminal to pass and sends the same to the switch circuit; the band-pass filters are formed by using resonant circuits; the substrate is a layered substrate including dielectric layers and conductor layers alternately stacked, and the resonant circuits are formed by using some of the dielectric layers and some of the conductor layers; each of the resonant circuits includes a transmission line that is formed by using one of the conductor layers and that has an inductance; a longitudinal direction of the transmission line that the resonant circuit of the first band-pass filter for reception includes and a longitudinal direction of the transmission line that the resonant circuit of the second band-pass filter for reception includes intersect at a right angle; and a longitudinal direction of the transmission line that the resonant circuit of the first band-pass filter for transmission includes and a longitudinal direction of the transmission line that the resonant circuit of the second band-pass filter for transmission includes intersect at a right angle.