| 摘要 |
A device for dynamic impedance matching between a power amplifier and an antenna, having a circulator ( 210 ), which routes a signal received from the power amplifier ( 10 ) at a first port via a second port to the antenna ( 30 ) and diverts the signal reflected at the antenna ( 30 ) and received at the second port through a third port; and a controllable matching network ( 24, 240, 250 ); is characterized in that a directional coupler ( 200 ) diverts a proportion of the signal traveling from the power amplifier ( 10 ) to the antenna ( 30 ), from which the magnitude and phase of the signal may be derived, to a signal detector ( 220 ); and the circulator ( 210 ) routes the entire signal reflected at the antenna ( 30 ) into the signal detector ( 220 ); wherein the signal detector ( 220 ) passes the magnitude and phase of both the signal traveling to the antenna ( 30 ) and the signal reflected at the antenna ( 30 ) to a controller ( 230 ), which evaluates the information received from the signal detector ( 220 ) in order to determine the present impedance value of the antenna ( 30 ) and to correct the controllable matching network ( 24, 240, 250 ) having active and passive components in accordance with the determined impedance value of the antenna ( 30 ).
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