A Tunable Integrated Duplexer with 50dB Isolation in 40nm CMOS

📋 论文概要

该论文提出了首个集成在CMOS工艺中的双工器，通过混合变压器的电平衡而非频率选择性来实现隔离，解决了全双工蜂窝应用中集成双工器的隔离难题。

💡 主要创新点

• 首次在CMOS中实现集成双工器，满足WCDMA和HSPA等全双工应用的性能要求。
• 采用混合变压器电平衡技术替代传统频率选择性滤波器，实现50dB隔离。

🏷 关键词

📄 原文摘要

frequency-selective filters for isolation. The stringent isolation requirements prohibit the integration of RF duplexers on silicon and particularly in CMOS technology. However, CMOS technology offers superior tuning and calibration capabilities supported by the integrated digital baseband. This work presents the first integrated duplexer in CMOS technology with an adequate performance for full-duplex cellular applications such as WCDMA and HSPA. The proposed implementation is based on electrical balance of a hybrid transformer rather than frequency selectivity which unfavorably requires high-Q elements. An integrated duplexer should perform two functions: first, it must provide concurrent matching for the antenna, the transmitter (TX), and the receiver (RX), and second it should attenuate the transmitted signal at the RX input to

👥 作者与机构

M. Mikhemar1, H. Darabi1, A. Abidi2, 1

Broadcom, Irvine, CA University of California, Los Angeles, CA 2 Modern RF duplexers rely on