JSSC 2015第5期RF & Wireless65nm

A Wideband Highly Integrated and Widely Tunable Transceiver for In-Band Full-Dup

一款宽带高集成度可调谐收发器，支持同频全双工操作。

0.1–1.5 GHz频率调谐范围，噪声系数低至5.5 dB，发射功率达7.1 dBm

宽带收发器同频全双工噪声消除被动混频器CMOS

▸创新点1：采用被动混频器优先架构（系统创新），通过共享单一被动混频器实现同时上变频和下变频，简化了传统双工架构的复杂性，显著提升了系统集成度和能效比。

▸创新点2：基带噪声消除双工低噪声放大器（电路创新），在满足噪声消除条件的同时，实现了发射信号到混频器的缓冲及接收路径中信号的消除，有效降低了噪声系数（NF低至5.5 dB）并提升了线性隔离度（30 dB）。

▸创新点3：实现同频段并发收发功能（系统创新），支持0.1–1.5 GHz宽频带调谐范围内的全双工操作，解决了传统频分或时分双工的频谱效率限制问题。

▸创新点4：显著抑制发射诱导噪声及收发信号间的非线性互调（电路创新），通过基带双工处理技术，减少了传统RF前端双工的干扰问题，提升了系统动态范围。

Abstract

A fully integrated wideband active duplexing transceiver with baseband noi se-cancelling duplexing LNAs is presented. The circuit allows in-band full duplex operation with concurrent reception and transmission in the same band or closely-spaced channels. A pass ive mixer-ﬁrst architecture is applied here, sharing a single passive mixer to perform simul- taneous up-conversion and down-conversion. The bi-directional transparency of the passive mixer allows the duplexing function to be implemented