A 13th-Order CMOS Reconfigurable RF BPF with Adjustable Transmission Zeros for SAW-Less SDR Receivers

📋 论文概要

该论文提出了一种13阶CMOS可重构射频带通滤波器，通过可调传输零点实现高选择性，旨在替代传统声学滤波器（SAW/BAW），用于无SAW的软件定义无线电（SDR）接收机，以支持多频段、多输入多输出（MIMO）和载波聚合需求。

💡 主要创新点

• 提出13阶CMOS可重构RF BPF，避免了声学滤波器的使用，减小了系统体积。
• 引入可调传输零点，实现了陡峭的滚降和低插入损耗，提高了滤波器选择性。
• 针对SAW-Less SDR接收机设计，支持多频段动态配置，适用于未来的通信系统。

🏷 关键词

📄 原文摘要

Current cellular receivers often employ acoustic filters (SAW or BAW) for each communication band due to their high selectivity, low insertion loss, and small formfactor. The need to support multiple communication bands, multi-input multioutput (MIMO) communications, and carrier aggregation necessitates the use of several such acoustic filters with a large overall footprint. These acoustic RF filters employ several high-Q acoustic resonators to create several poles and transmission zeros in a high-order transfer function to achieve low insertion loss within a nearly flat passband, fast roll-off, and highly attenuated stopband. The low quality factor of integrated passive components, specifically inductors, leads to a significant increase of insertion loss (proportional to the filter order and inversely proportional to the component quality factor) and poor stopband rejection for an equivalent RF filter.

👥 作者与机构

Pingyue Song, Hossein Hashemi

University of Southern California, Los Angeles, CA