Dual Resonance Circuits by Defected Ground Structure Resonators for Low Phase Noise K-Band CMOS VCO

Abstract

We analyze the quality factor $(\boldsymbol{Q_{U}}/\boldsymbol{Q_{K}})$ of three different types of defected ground structure (DGS) resonators including a series resonance in addition to the parallel one. Then, we implement the resonators to design high-performance K-band VCOs in $0.18\ {\mu} \mathbf{m}$ CMOS Technology and finally, a low phase noise VCO at K-band is introduced.