Provided is a signal generator. The signal generator includes an insulating substrate, a chip disposed on the insulating substrate and including an oscillator including a capacitance element determining a resonant frequency signal, and a plurality of conductive lines disposed on the same surface of the insulating substrate to be spaced apart from each other. At least one of the plurality of conductive lines is electrically connected with the oscillator and provides an inductance element determining the resonant frequency signal to the oscillator.