Ka-Band CMOS 360° Reflective-Type Phase Shifter with ±0.2 dB Insertion Loss Variation Using Triple-Resonating Load and Dual-Voltage Control Techniques

This paper demonstrates the design of a Ka-band 360° reflective-type phase shifter (RTPS). Triple-resonating load technique is used to reach broadband full 360° phase-shift range and achieve low insertion loss variation. With dual-voltage control technique adopted, insertion loss variation is further reduced. Implemented in 65nm CMOS technology, the proposed RTPS achieves 379° phase-shift range at 29 GHz with only one control voltage. With dual-voltage control, a measured phase-shift range of 360° with 8.3 ± 0.2 dB insertion loss is achieved at 29 GHz. It also ensures 360° phase-shift range and 8-9 dB insertion loss (i.e., <;1 dB variation) across 27.8-31.2 GHz. The corresponding return loss across frequencies are better than 20 dB.