Patent ID: 8102232

Claim:
A variable inductor, comprising a substrate having a surface layer and an inner layer; a plurality of fixed inductors disposed on said substrate; a signal microstrip line connecting the fixed inductors to one another in series forming a serial fixed inductor; a conductive sheet having a first side and a second side; an insulator; a signal input terminal; and a signal output terminal; wherein one end of said serial fixed inductor is connected to said signal input terminal, and the other end of said serial fixed inductor is connected to said signal output terminal; said first side is connected to said insulator and said second side is contacted with said surface layer; said signal input terminal, said signal output terminal, and said signal microstrip line are disposed on said surface layer; said insulator is movable and when said insulator is moved, said conductive sheet moves with said insulator whereby controlling inductance of the variable inductor.