Patent ID: 9748994
Date: 2017-08-29
CPC Classifications: H04B,H04W

Claim:
1. A communication module that concurrently performs wireless communication of a first signal and wireless communication of a second signal, the first signal and second signal being in different frequency bands, the communication module comprising: a wiring board that includes a first antenna terminal connectable to a first-signal antenna used in communication of the first signal or to a shared antenna used in both communication of the first signal and communication of the second signal, and a second antenna terminal connectable to a second-signal antenna used in communication of the second signal; a first communication unit disposed on the wiring board, the first communication unit transmitting the first signal; and a second communication unit disposed on the wiring board, the second communication unit receiving the second signal; wherein the wiring board includes: a first-signal transmission line disposed in a path that interconnects the first antenna terminal and the first communication unit, the first signal being transmitted through the first signal transmission line, a second-signal first transmission line disposed in a path that interconnects the second antenna terminal and the second communication unit, the second signal being capable of being transmitted through the second-signal first transmission line in a state in which the second-signal antenna is connected to the second antenna terminal, a second-signal second transmission line disposed in a path that interconnects the first antenna terminal and the second communication unit, the second signal being transmitted through the second-signal second transmission line, a first common transmission line provided so as to be shared between a path that interconnects the first antenna terminal and the first-signal transmission line and a path that interconnects the first antenna terminal and the second-signal second transmission line, and a second common transmission line provided so as to be shared between a path that interconnects the second-signal first transmission line and the second communication unit and a path that interconnects the second-signal second transmission line and the second communication unit, and the second-signal first transmission line functions as an open stub that attenuates the first signal transmitted from a branch point between the second-signal first transmission line and the second-signal second transmission line to the second communication unit through the second common transmission line in a state in which the second antenna terminal is open.