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

A method for generating a look-up table relating a set of measured parameters to a set of matched states for a tunable impedance matching network, said method comprising the steps of:

• measuring a set of parameters associated with a plurality of impedance loads while the tunable impedance matching network is in a predetermined state;
• determining a matched state for each of the plurality of impedance loads;
• and
• providing the plurality of determined matched states in a look-up table.

A computer readable storage medium comprising computer instructions which when executed cause a processor to perform a method for adaptively tuning a tunable impedance matching network with a lookup table, the lookup table containing a plurality of complex reflection coefficients corresponding to a plurality of impedance mismatches between an input terminal and an output terminal of the tunable impedance matching network, said method comprising:

• determining the impedance mismatch between the input and output terminals of the tunable impedance matching network;
• determining the closest impedance mismatch in the lookup table;
• and
• using the complex reflection coefficients in the lookup table which correspond to the determined closest impedance mismatch to tune the tunable impedance matching network.

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;
• and
• using the closest match to the selected parameter in the lookup table to tune the tunable impedance matching network.