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Methods for tuning an adaptive impedance matching network with a look-up table

  • US 8,421,548 B2
  • Filed: 11/16/2011
  • Issued: 04/16/2013
  • Est. Priority Date: 09/24/2008
  • Status: Active Grant
First Claim
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1. An apparatus comprising a controller which when executing computer instructions is operable to adaptively tune a tunable impedance matching network with a lookup table, the lookup table containing sets of parameters corresponding to matched states for the tunable impedance matching network, said controller being operable for:

  • selecting a parameter from the group consisting of complex reflection coefficients, current drain, incident power, reflected power, control setting of the tunable matching network, temperature, input power level, reliability considerations and linearity considerations;

    determining the closest match to the selected parameter in the lookup table;

    using the closest match to the selected parameter in the lookup table to tune the tunable impedance matching network, wherein the tunable impedance matching network includes voltage, variable capacitors, wherein the voltage variable capacitors are ferroelectric capacitors; and

    controlling the ferroelectric capacitors with digital-to-analog converters.

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