Patent ID: 7142824

Claim:
An antenna device comprising: a first antenna which is matched with first, second, and third frequency bands; a second antenna which is matched with the third frequency band; a diplexer which distributes signals received from the first antenna into signals of the first frequency band and signals of the second and third frequency band; a first switch unit which selects a first transmitter for transmitting signals of the first frequency band or a first receiver for receiving signals of the first frequency band, and connects the selected one to the diplexer; a second switch unit which selects a second receiver for receiving signals of the second frequency band or a second transmitter for transmitting signals of the second frequency band, and connects the selected one to the diplexer; and a third switch unit which selects the second antenna or diplexer, and connects the selected one to a transmitter/receiver for transmitting and receiving signals of the third frequency band.