| 摘要 |
<p>The invention relates to for processing an electromagnetic input signal, wherein the signal is passed through an input to be modified across a plurality of modifying segments (210-216) using a characteristic of the signal, and wherein the plurality of segments (210-216) have a plurality of states controlled by a control signal, by determining a reference impedance for the input for one or more states of the plurality of segments (210-216); and adaptively adjusting impedance of the input toward the reference impedance. This may be accomplished for example, by using a matching circuit (222, 224, 226, 228) comprising one or more selected from the group consisting of a digital signal processor, a microprocessor, a logic circuit, an integrated circuit, a phase shifter (226), a resistor (228), a variable inductor, and a variable capacitor. The matching circuit (222, 224, 226, 228) determines shifts in impedance of the input after a change in state of the segments; and adaptively adjusts the impedance based upon the shift.</p> |
