JSSC 2024第2期RF & Wireless0.15 µm GaN HEMT

A 4971-GHz High-Efficiency Post-Matching GaN Front-End Module for Wi-Fi 7 Applic

提出一种改进的GaN前端模块架构，提升Wi-Fi 7应用的发射效率。

4.9–7.1 GHz, 37.1–38.6 dBm, 45%–52.4% PAE

GaN前端模块Wi-Fi 7后匹配架构功率放大器发射效率

▸采用后匹配架构消除发射分支开关

▸利用λ/4传输线吸收PA输出电容

▸通过SPST开关提供PA漏极电压

Abstract

This article presents a modified transmit/receive (T/R) front-end module (FEM) architecture with improved transmitter (TX) efficiency. Single-pole double-throw (SPDT) switch is commonly adopted in conventional FEM for T/R isola- tion, but its insertion loss (IL) deteriorates TX efficiency greatly. To alleviate this problem, a post-matching (PM) architecture is proposed to eliminate the switch in the TX branch. Specifically, a PM network (PMN) is employed to transform 50- impedance at the anten