WCDMA射频前端集成电路设计

【作者】 王晓东；

【导师】 宋家友；

【作者基本信息】 郑州大学 ， 电路与系统， 2007， 硕士

【摘要】 第三代移动通信系统(3G)是一种能提供多种类型、高质量的多媒体业务，能实现全球无缝覆盖，具有全球漫游能力，与固定网络相容，并以小型便携式终端在任何时候、任何地点进行任何种类通信的通信系统。由于其诸多优点，第三代移动通信系统对全世界电信行业工作者及信息社会越来越具吸引力。WCDMA作为第三代移动通信的主导技术，近来发展迅速，在第三代移动通信系统3个技术标准中(WCDMA，TD-SCDMA and CDMA2000)最具竞争力。本文采用TSMC 0.18μm CMOS工艺设计并实现用于2.14GHz WCDMA系统射频接收机中的低噪声放大器(LNA)和低中频下变频器(Down converter)。其中，LNA的主要功能是将天线接收到的微弱信号进行放大，同时引入的噪声较低，输入端要求实现50欧姆阻抗匹配，Down Converter将LNA输出的信号与本振信号(LO)混频产生低中频信号，要求噪声低、线性度高并提供适当的增益。论文对射频前端集成电路的原理进行了分析，比较了不同电路结构的性能。给出了射频前端集成电路的电路设计、版图设计、仿真结果。仿真结果表明，此次设计的射频前端集成电路具有低噪声、低功耗的特点，其它性能也完全满足设计指标要求。更多还原

【Abstract】 The third generation of mobile communication (3G). is the one that can provide us with much more kinds of multimedia services, spread over any corner of the earth without any miss, travel globally, and do any kind of communication any time and any place. Because of its many advantages, it has become more and more attractive for the world’s major players in telecommunications and the information society. WCDMA, as the leading technique of 3G, which has developed rapidly, is the most competitive among the three specifications of 3G (WCDMA, TD-SCDMA and CDMA2000).The task in this paper is to realize the low noise amplifier (LNA) and down converter for the radio frequency (RF) module of 2.14GHz WCDMA system in TSMC 0.18μm CMOS technology. The first stage amplifier amplifies the weak signal from antenna introducing low noise. The input needs to be matched to 50Ohm. The latter one realizes the mixing of signal from LNA and local oscillator and output low intermediate frequency (IF) signal. Low noise, high linearity and moderate gain are needed for this module.Based on the analysis of the front end principle, different circuit structures are compared. The circuit design, layout design, simulation results and test solutions are introduced. The simulation results show that the low-noise low-power RF front end matches the design target.更多还原