Patent ID: 8723609

Claim:
A voltage-controlled oscillator (VCO) module, comprising: a first VCO unit, having a first terminal and a second terminal and generating a first oscillator signal; a second VCO unit, coupled to the first VCO unit and generating a second oscillator signal; and a matching circuit, coupled between the first VCO unit and the second VCO unit, wherein the matching circuit comprises a plurality of inductor modules respectively coupled between the first terminal of the first VCO unit and the second VCO unit, between the first terminal and the second terminal of the first VCO unit, and between the second terminal of the first VCO unit and the second VCO unit, wherein the second VCO unit serves as an injection locking frequency divider, and a frequency of the second oscillator signal is half of a frequency of the first oscillator signal.