Patent ID: 8390392

Claim:
A variable capacitance module comprising: a laminate substrate; a variable capacitance element defined by a MEMS element including a predetermined variable capacitance width, and the variable capacitance element is arranged to enable a capacitance of the variable capacitance element to be set to different values that incrementally increase in at least three steps within the variable capacitance width; a first fixed capacitance element connected in series to the variable capacitance element so as to define a series circuit, and mounted in the laminated substrate in which the variable capacitance element is mounted or defined by an inner-layer flat-plate electrode in the laminated substrate; and a second fixed capacitance element connected in parallel to the series circuit of the variable capacitance element and the first fixed capacitance element, and mounted in the laminated substrate in which the variable capacitance element is mounted or defined by an inner-layer flat-plate electrode in the laminated substrate; wherein the variable capacitance width of the variable capacitance element is fixed; the second fixed capacitance element is set to a capacitance value based on a desired variable capacitance range of the variable capacitance module; and the first fixed capacitance element is set to a capacitance value determining a desired variable capacitance pitch of the variable capacitance module.