摘要：在Wi-Fi无线射频的架构下,有3个关键器件决定了Wi-Fi系统的性能,分别是:Wi-Fi射频主芯片(Wi-Fi Chipset),前端射频器件如功率放大器、低噪放、开关或模组(PA/LNA/Switch or Front-End Module),以及天线(Antenna)。由于半导体研发与工艺技术的发展,除了芯片本身的运算能力外,系统的整合度也得到大幅度的提升,基于市场的激烈竞争与客户的特殊需求,越来越多的Wi-Fi射频主芯片将功率放大器整合在本身的射频芯片中,从而为客户提供更简易与低成本的设计。

摘要：Nanogenerators were first demonstrated by deflecting aligned ZnO nanowires using a conductive atomic force microscopy(AFM)*** output of a nanogenerator is affected by three parameters:tip normal force,tip scanning speed,and tip *** this work,systematic experimental studies have been carried out to examine the combined effects of these three parameters on the output,using statistical design of experiments.A statistical model has been built to analyze the data and predict the optimal parameter *** an AFM tip of cone angle 70°coated with Pt,and ZnO nanowires with a diameter of 50 nm and lengths of 600 nm to 1μm,the optimized parameters for the nanogenerator were found to be a normal force of 137 nN and scanning speed of 40μm/s,rather than the conventional settings of 120 nN for the normal force and 30μm/s for the scanning speed.A nanogenerator with the optimized settings has three times the average output voltage of one with the conventional settings.