COMMUNICATION DEVICE

摘要

A communication device includes an antenna unit, a switch unit, a matching unit which is connected between the antenna and switch units, a communication unit which is connected to the switch unit, and a switch control unit. When the switch unit is in a conductive state, the matching unit matches a first impedance occurring if the antenna unit is seen from the matching unit and a second impedance occurring if the switch unit is seen from the matching unit. The switch control unit controls the switch unit so that the switch unit is set to the conductive state when the communication unit communicates via the antenna unit, and so that the switch unit is set to an interrupted state when the communication unit is to be protected from overvoltage. The switch control unit and switch unit are semiconductors formed under a first process rule and second process rule, respectively.

主权项

1. A communication device comprising:
an antenna section; a switch section capable of taking an electrically connected state and an electrically disconnected state; a matching section including an impedance matching circuit and connected between the antenna section and the switch section, the matching section matching a first impedance and a second impedance with each other when the switch section is in the electrically connected state, the first impedance is an impedance seen from the matching section toward the antenna section, the second impedance is another impedance seen from the matching section toward the switch section; a communication section connected to the switch section; and a switch control section which controls the switch section to set the switch section to the electrically connected state when the communication section is required to carry out communication via the antenna section and which controls the switch section to set the switch section to the electrically disconnected state when the communication section is required to be protected against overvoltage, wherein the switch control section is a semiconductor circuit formed under a first process rule, and the switch section is another semiconductor circuit formed under a second process rule different from the first process rule.