Research Of Smart-Antenna And Its Experiment Platform

In this paper,a Smart-Antenna base receiver compatible with the W-CDMA standard is researched and designed.According to this standard,the up-link frequency band allocates from 1920MHz ～1980MHz,and the signal is modulated by QPSK schemes.Firstly the basic concepts and working principles of the smart antenna is presented,along with its research situation at home and abroad.Then the algorithm of the smart antenna is introduced.Then the experiment platform of the smart -antenna is researched and analysized.The plan is dividing the experiment platform into modules and analysizing the modules.At last,paper introduces the important part of the paper-RF front-end module.The property of the RF front-end circuit directly influnces the property of the whole experiment platform.The paper analysis and designs the low noise amplifer(LNA) and mixer.All circuits above are simulated individually using Ansoft Serenade ,and the results are satisfying with the desired performance.