JSSC 2025第11期Other0.13µm SiGe BiCMOS

Design and Analysis of Ka-Band Variable-Gain Phase Shifter With Impedance-Invariant Vector Modulation Qingzhe Zhang , Student Member , IEEE, Yi Lai, Student Member , IEEE

提出一种Ka波段阻抗不变可变增益移相器，实现高精度相位和幅度控制。

7-bit相位分辨率(360°), 4-bit增益调节(7.5dB动态范围), 0.33°/0.10dB rms误差(移相模式), 0.23°/0.08dB rms误差(VGA模式), 7.4-12.2mW功耗

Ka波段可变增益移相器阻抗不变矢量调制负反馈磁耦合

▸新型阻抗不变矢量调制技术

▸负反馈磁耦合(NFMC)方法稳定VGA阻抗

▸低相位和幅度误差设计

Abstract

This article presents a 32–38-GHz variable-gain phase shifter (VGPS) with a novel impedance-invariant vector modulation technique for highly precise phase and amplitude control. A negative-feedback magnetic-coupling (NFMC) method is proposed to stabilizes input and output impedances of variable gain amplifier (VGA), and it effectively alleviates the impedance variations at the different currents biased from the current digital to analog converter (DAC). The VGPS is fabricated with a 0.13- µm SiG