A compact 90–96 GHz 6‐bit passive vector modulator phase shifter in 28‐nm CMOS for phase array applications. Issue 1 (13th October 2022)

• Record Type: Journal Article
• Authors: Deng, Biao; Pan, Dongfang; Duan, Zongming; Liu, Jie; Wu, Fang; Sun, Liguo
• Is Part Of: Microwave and optical technology letters. Volume 65:Issue 1(2023)
• Page Start: 129
• Page End: 134
• Publication Date: 2022-10-13
• Subjects: differential directional coupler -- high‐precision quadrature signal -- passive vector modulator -- phase shifter -- phased array; Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.33482
• Languages: English
• ISSNs: 0895-2477

Abstract

Abstract: This letter presents a 90–96 GHz 6‐bit digital control passive vector modulator phase shifter (PS) in a 28‐nm complementary metal–oxide–semiconductor for phase array application. In PS, a full differential directional coupler as a quadrature generator (QG) is proposed, which achieves wide bandwidth and a high‐performance orthogonal network by introducing more pole‐zero pairs. In the vector modulator, two 6‐bit binary‐weighted vector modulators, respectively scale the quadrature signal generated by QG to achieve a high‐resolution vector phase. The measured PS cover 36 0 ∘ $36{0}^{\circ }$ and the minimal root mean square (RMS) phase error is 0 . 7 ∘ $0\text{.}{7}^{\circ }$ and RMS gain error 0.3 dB at 93 GHz, respectively. The fabricated PS occupies 310 × 280 μm 2 $310\times 280\, {\mathrm{\mu m}}^{2}$ excluding pads with no power consumption.