摘要
针对传统的宽带LNA普遍存在噪声系数大、芯片面积相对较大等不足,采用0.18!m CMOS工艺设计了一种基于IEEE802.11a的全集成低噪声放大器(LNA),选用源级电感负反馈电路,实现了良好的输入匹配。调整偏置电压和MOS管的宽长比进行了噪声优化。后仿真结果表明,在5.15～5.825GHz的频带范围内,增益S21大于16.03dB,增益平坦度为1.51dB,最大噪声系数和输入三阶截点分别为2.565dB、-2.15dBm。采用1.8V电源供电,电路总功耗约为13.29mW。
A fully integrated low noise amplifier （LNA） based on IEEE802. lla is designed in 0. 18 ttm CMOS tech- nology. Source inductor negative feedback circuit is used to achieve better input match. Adjusting the bias voltage and the breadth length ratio of the MOSFET can optimize the noise performance. The post simulation results show that the maximum gain Sn is more than 16.03 dB and the gain ripple is 1.51 dB from 5.15 GHz to 5. 825 GHz. The maximum noise figure is 2. 565 dB and input third-order intercept point （ⅡP3） is -2.15 dBm. The total power con- sumption is 13.29 mW under a 1.8 V supply.
出处
《桂林电子科技大学学报》
2012年第6期431-434,共4页
Journal of Guilin University of Electronic Technology
基金
国家自然科学基金(61161003
61166004)
关键词
输入匹配
LC谐振网络
噪声系数
源随器
input matching
LC resonant network
noise figure
source follower
