Capacitor circuit and variable capacitance system including the same

A variable capacitance system comprising:

• a capacitor circuit configured to provide a capacitance value as part of an impedance of an antenna, the capacitor circuit comprising a first capacitor bank and a second capacitor bank;
• and
• a controller configured to control capacitance values provided by the first capacitor bank and the second capacitor bank,
• wherein the first capacitor bank comprises a plurality of first capacitors having mutually different capacitance values based on a first weight, and
• the second capacitor bank comprises a plurality of second capacitors having mutually different capacitance values based on a second weight different from the first weight.

A capacitor circuit comprising:

• a first capacitor bank and a second capacitor bank connected to each other in parallel,
• wherein the first capacitor bank comprises p switch-capacitor circuits connected to each other in parallel, where p is a natural number of 2 or more,
• the second capacitor bank comprises p+1 switch-capacitor circuits connected to each other in parallel,
• the p switch-capacitor circuits of the first capacitor bank have mutually different capacitance values,
• first to p-th switch-capacitor circuits of the second capacitor bank have mutually different capacitance values, and
• the first switch-capacitor circuit and a p+1-th switch-capacitor circuit of the second capacitor bank have a same capacitance value.