A 5.4dBm 42mW 2.4GHz CMOS BAW-Based QuasiDirect Conversion Transmitter

📋 论文概要

该论文提出了一种基于BAW（体声波）谐振器的2.4GHz准直接转换发射机，旨在解决低数据率无线传感器网络在高速率通信中的灵活性和效率问题。通过采用BAW谐振器实现频率合成和调制，该发射机在5.4dBm输出功率下仅消耗42mW功耗，实现了低功耗与高性能的平衡。

💡 主要创新点

• 采用BAW谐振器替代传统LC振荡器，实现低相位噪声和低功耗的频率合成，同时避免PA牵引问题。
• 提出准直接转换架构，结合直接调制和直接转换的优点，支持多种调制方案（如GFSK、OQPSK）和宽数据率范围。
• 在0.18μm CMOS工艺中集成BAW器件，实现了5.4dBm输出功率和42mW总功耗，效率优于同类设计。

🏷 关键词

📄 原文摘要

The trend of low-data rate wireless sensor networks (WSN) to interface at higher data rate with other devices or networks using standard protocols such as Bluetooth Low Energy and ZigBee, calls for a flexible RF system able to transmit efficiently with various modulation schemes over a wide range of data rates. For the 2.4GHz ISM band, direct modulation [1], direct conversion [2] and double conversion [3] transceiver architectures have been implemented, showing a general trend of an increase in the transmitter complexity in order to address problems such as PA pulling of the LO, oscillator leakage on the antenna and I/Q mismatch. This usually comes at the cost of a lower overall efficiency. A transmitter based on BAW resonators represents an interesting solution to combine architecture simplicity, low-power consumption and spectrum quality. Differently from narrowband BAW-based transmitters targeted to OOK modulations as in

👥 作者与机构

Matteo Contaldo, David Ruffieux, Christian Enz

CSEM, Neuchâtel, Switzerland