A split-ring resonator (SRR) based millimeter-wave SPST switch in 0.13um BiCMOS technology

the paper presents a single-pole single-throw (SPST) switch operating at 63.5 GHz in 0.13um BiCMOS technology. The switch using transmission line with SRRs loaded which can enhance EM energy coupling and further improve the quality factor. Due to the deep transmission zero of the SRRs, high isolation is achieved when the situation is OFF. The situation of the switch can easily change by turning off the inner SRR cell through transistors on the end of SRRs.