A High-Linearity CMOS Receiver Achieving +44dBm IIP3 and +13dBm B1dB for SAW-Less LTE Radio

📋 论文概要

该论文提出了一种高线性度CMOS接收机，通过结合隔离器和片上滤波技术，实现了无SAW滤波器的LTE无线电接收，解决了多频段SAW滤波器带来的复杂性问题。接收机达到了+44dBm IIP3和+13dBm B1dB，能够处理高达+10dBm的TX泄漏和-15dBm的带外阻塞信号。

💡 主要创新点

• 提出将隔离器与片上滤波相结合，替代传统SAW滤波器，支持多频段操作。
• 实现了极高的线性度（+44dBm IIP3和+13dBm B1dB），满足无SAW LTE接收机对强带外干扰的抑制需求。

🏷 关键词

📄 原文摘要

high-linearity up-front filtering to prevent corruption of the in-band signals by strong out-of-band (OOB) signals and selfinterference from the transmitter. SAW duplexer filters are generally used for this purpose, but supporting the plethora of existing and new bands becomes troublesome with separate filters for each band. In this paper we explore the possibility of combining an isolator with on-chip filtering. However, even with 15dB isolation, the on-chip filter needs to deal with up to +10dBm TX leakage and -15dBm OOB blocking, which requires an extremely high IIP3 around +50dBm and IIP2 around +90dBm. Recently inductorless tunable N-path-filter-based receivers achieved >10dBm compression point and good IIP3 of 20 to 30dBm. In order to further improve the receiver linearity to approach the extremely high IIP3

👥 作者与机构

Yuanching Lien1,2, Eric Klumperink1, Bernard Tenbroek3, Jon Strange3, Bram Nauta1

University of Twente, Enschede, The Netherlands MediaTek, Hsinchu, Taiwan 3 MediaTek, Kent, United Kingdom 1 2 LTE-advanced wireless receivers require