JSSC 2015第12期RF & Wireless65nm

Integrated Wideband Self-Interference Cancellation in the RF Domain for FDD and

提出一种用于FDD和FD无线应用的集成宽带自干扰消除技术，通过可调谐的高Q值RF带通滤波器和线性N-path Gm-C滤波器实现。

0.8–1.4 GHz, >20 MHz 20 dB cancellation bandwidth, +25–27 dBm OOB IIP3, +90 dBm OOB IIP2

自干扰消除FDD全双工RF滤波器CMOS

▸采用可调谐、可重构的二阶高Q RF带通滤波器模拟天线接口隔离

▸线性N-path Gm-C滤波器实现嵌入式可变衰减和相移

▸在65nm CMOS工艺中实现0.8–1.4 GHz接收机，实现>20 MHz 20 dB的消除带宽

Abstract

A fully integrated technique for wideband cancella- tion of transmitter (TX) self-interference (SI) in the RF domain is proposed for multiband frequency-division duplexing (FDD) and full-duplex (FD) wireless applications. Integrated wideband SI cancellation (SIC) in the RF domain is accomplished through: 1) a bank of tunable, reconﬁgurable second-order high-Q RF bandpass ﬁlters in the canceller that emulate the antenna inter- face’s isolation (essentially frequency-domain equalization in the RF