Patent ID: 8026773

Claim:
An impedance matching system comprising: a digitally tunable impedance matching network having a maximum capacitance C, the network including: a first capacitor having a fixed plate and a moveable plate configured to be in a first position or a second position, wherein the first capacitor provides a first predefined value of capacitance when the movable plate is in the first position and an open circuit when the movable plate is in the second position; and a second capacitor coupled in parallel to the first capacitor and having a fixed plate and a moveable plate configured to be in a first position or a second position, wherein the second capacitor provides a second predefined value of capacitance when the movable plate is in the first position and an open circuit when the movable plate is in the second position; and a digital controller coupled to the first and second capacitors and configured to actuate the moveable plate of one or both of the first and second capacitors to produce a capacitance in the range of zero to the sum of the first and second predefined values of capacitance.