A 26-30GHz Digitally-Controlled Variable Gain Power Amplifier with Phase Compensation and Third Order Nonlinearity Cancellation Technique

Phased array transceivers at Ka-band frequencies are of greater importance with the rapid development of satellite communications. This paper presents a two-stage variable gain power amplifier (VGPA) with high linearity and low phase variation in 40nm CMOS process. Accurate gain control is realized...

Full description

Saved in:
Bibliographic Details
Published in2023 IEEE Asian Solid-State Circuits Conference (A-SSCC) pp. 1 - 3
Main Authors Qin, Haoqi, Gu, Junjie, Xu, Hao, Liu, Weitian, Han, Kefeng, Yin, Rui, Duan, Zongming, Gao, Hao, Yan, Na
Format Conference Proceeding
LanguageEnglish
Published IEEE 05.11.2023
Subjects
Linearity
Measurement uncertainty
Phase measurement
Phased arrays
Power amplifiers
Solid state circuits
Transceivers
Online AccessGet full text
DOI10.1109/A-SSCC58667.2023.10347966

Cover

More Information
Summary:Phased array transceivers at Ka-band frequencies are of greater importance with the rapid development of satellite communications. This paper presents a two-stage variable gain power amplifier (VGPA) with high linearity and low phase variation in 40nm CMOS process. Accurate gain control is realized through digitally controlled current steering. The inter-stage compensation inductor suppresses phase variations among different gain states. Bias of each stage is chosen such that the third order distortions generated by each stage are of opposite polarities, which greatly improves the overall linearity of the cascading amplifier. Without additional trimming, the 26-30GHz VGPA achieves a total 3.5dB gain tuning range with 0.5dB resolution. The measured OP1dB is 14.4dBm and the RMS phase error is 0.29° at 28GHz.
DOI:10.1109/A-SSCC58667.2023.10347966