A 14~18 GHz Compact Double-Pole Triple-Throw Switch Based Multi-Phase Integrated 6-bit Passive Phase Shifter

This brief presents a novel compact double-pole triple-throw switch based multi-phase integrated 6-bit passive phase shifter. An innovative topology adopts one high-pass circuit and two low-pass circuits connected in parallel via double-pole triple-throw switch is proposed to replace 22.5° and 45° inductor-based bridged T-type phase shifting cells for 50% chip size reduction. Furthermore, in 5.625° phase shifting cell, a novel topology whose phase error is smaller than 0.05° is proposed by adopting a phase shifting fluctuation optimization unit and two low-pass circuits connected in parallel. The proposed phase shifter is implemented in 55 nm CMOS technology. Electromagnetism simulation results show that the root-mean-square (RMS) phase error of this phase shifter is 2.5°~4.2° from 14 to 18 GHz. An average insertion loss (IL) of -13.1±2.1 dB is achieved. The core chip area is 1.2
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0.62 mm
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.