| 摘要 |
Method for controlling an input impedance of an antenna ( 100 ). The method can include the steps of coupling RF energy from an input RF transmission line ( 106 ) to an antenna radiating element ( 102 ) through an aperture ( 112 ) defined in a ground plane ( 110 ). For example, the aperture ( 112 ) can be a slot and the radiating element ( 102 ) can be a patch type element. The input impedance can thereafter be controlled by selectively varying a volume or a position of a conductive fluid ( 128 ) disposed in a predetermined region between the RF transmission line and the antenna radiating element. The volume of conductive fluid ( 128 ) can be automatically varied in response to at least one control signal ( 132 ).
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