Research and Design of RF Front-end Circuit of Smart Antenna: This paper briefly explains the importance of RF front-end in smart antenna system, gives the block diagram of channel front-end design, and performs system-level simulation on the receiving circuit of RF front-end. Keywords: Smart antenna RF circuit Receiver simulation With the rapid development of mobile communication industry around the world, the total number of mobile communication users in my country has jumped to the first place in the world. As a communication power, many domestic universities and companies are committed to the research and development of communication industry, and in the early 1990s, my country proposed the first communication standard TD-SCDMA with independent intellectual property rights, which became one of the three major mainstream standards in the third generation mobile communication system. Among them, smart antenna is one of the main research directions for the development of third generation mobile communication technology and mobile communication technology after the third generation. The application of smart antenna can effectively suppress multiple access interference, increase system capacity exponentially, and greatly improve the efficiency of spectrum utilization. It is an effective way to solve the sharp increase in the number of mobile phones and the lack of spectrum resources in recent years. In the base station equipment structure of mobile communication system, the RF front-end module is located between the antenna unit and the intermediate frequency processing unit. Its function is to provide a signal channel for communication between the base station and the user terminal. As a key component in the smart antenna system, it determines the communication quality of the entire system to a certain extent.
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