| 摘要 |
PURPOSE: A wireless terminal device is provided to reduce the number of components without degrading efficiency of power and to obtain an impedance of an antenna according to a location. CONSTITUTION: A switch detecting unit(8) obtains an impedance of an antenna corresponding to a location relation between a first case and a second case. A controlling unit(7) turns on a first switch based on a frequency band of a transmission signal. The controlling applies an intermediate voltage in order to match an impedance of an amplifier with the impedance of the antenna based on the impedance of the antenna obtained by the switch detecting unit. The amplifier is arranged to a transmission path where the first switch is turned on. [Reference numerals] (1) ANT switch; (5) BB unit; (6) Recording unit; (7) Controlling unit; (8) Switch detecting unit; (AA) Block diagram of a portable terminal according to an example 1
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