A 77-GHz Power-Controlled PA With Reusable Coupled-Line-Based Power Combining and Temperature Predistortion Technique in 28-nm CMOS

A 77-GHz Power-Controlled PA With Reusable Coupled-Line-Based Power Combining and Temperature Predistortion Technique in 28-nm CMOS

clockVolume: 73, Issue: 11, November 2025

authorDongfang Pan

A 77-GHz Power-Controlled PA With Reusable Coupled-Line-Based Power Combining and Temperature Predistortion Technique in 28-nm CMOS

Abstract
DOI: 10.1109/TMTT.2025.3590538   IEEEXplore: https://ieeexplore.ieee.org/document/11096714    
Device
A reusable N-way coupled-line power-controlled power amplifier (PA) architecture in 28-nm bulk CMOS.
Spectrum
72-86 GHz (3 dB BW)
Novelty
An N-way voltage series stacked power combiner, utilizing reusable coupled lines, significantly reduces area and power loss while optimizing power combining efficiency. A temperature predistortion technique, incorporating a temperature detector at the PA output and precise compensation control, ensures stable POUT with minimal fluctuation.
Application
Compact, efficient, and cost-effective automotive radar systems.
Performance
0.6 dBm POUT fluctuation from−45◦C to 125◦C; 18.7 dBm peak PSAT; 20% peak PAE; 20/12 dB gain/power control range (input power of 0 dBm).