| 摘要 |
A multi band antenna unit of a mobile device is provided to improve antenna performance, reduce a cost by reducing the number of circuits, and downsize a size of the mobile device. A multi band antenna unit(100) of a mobile device includes an antenna(110), a switch(120), a diplexer(130), a first signal processing unit(140), and a second signal processing unit(150). The antenna is movable between a first contact(111) and a second contact(112) and transmit and receives first and second signals with different frequency bands. The switch is connected to the first contact through a first path, is connected to the second contact through a second path, and selects any one of the first path and the second path to connect the selected path. The diplexer is connected to the switch and separates the first signal and the second signal. The first signal processing unit is connected to the diplexer. The second signal processing unit is connected to the diplexer.
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