JSSC 2020第6期RF & Wireless65nm

A 21-dm-OP1 dB 203--Efficiency -1318-dBm-Hz-Noise -X- -Band Cartesian Error Feed

提出一种X波段笛卡尔误差反馈环发射机，通过额外参考路径改善线性度与噪声性能。

21.4dBm最大输出功率，21dBm OP1dB，33.3%/30.3% PA效率，22.3%/20.3%系统效率，-133/-131.8dBm/Hz带外噪声

X波段笛卡尔反馈CMOS发射机功率放大器线性度优化

▸采用额外参考路径消除反馈信号，缓解传统笛卡尔反馈环发射机的线性度与噪声折衷问题

▸无需大衰减即可抑制反馈路径非线性，同时降低噪声贡献

▸闭环条件下实现邻道泄漏比和误差矢量幅度显著改善

Abstract

This article presents an X-band Cartesian error feedback loop transmitter (CEFLT) with a fully integrated power ampliﬁer (PA) in a 65-nm CMOS. The extra reference path cancels the feedback signal to mitigate the inherent linearity– noise tradeoff in the conventional Cartesian feedback loop transmitter (CFLT). In this wa y, the nonlinearities from the feedback path are suppressed without using large attenuation, and thus the noise contribution from the feedback path is reduced as well. Compared w