基于CC2540的蓝牙射频模块设计

Design of a RF model for Bluetooth Based on CC2540

采用TI公司CC2540蓝牙低功耗芯片作为核心器件,设计了一种基于蓝牙4.0协议的无线模块.设计给出了蓝牙无线通信模块系统硬件框架.并根据该系统框架设计了外围电路、射频阻抗匹配电路以及蓝牙印制倒F天线.采用分立阻抗器件搭建阻抗匹配网络以实现蓝牙模块的射频信号阻抗匹配,采用CST电磁仿真软件以及基于有限元法的HFSS电磁仿真软件对蓝牙天线进行建模和仿真.所设计的蓝牙模块具有低功耗、结构小型化、低生产成本等特点.

A wireless communication system model for Bluetooth Core Specification Version 4.0, based on TI＇ s chip of CC2540, is designed in this paper. The block diagram of hardware circuit for Bluetooth wireless system is proposed. The peripheral circuit, impedance matching circuit and a miniaturized Inverted-F antenna are designed based on the proposed frame work. The Printed Inverted-F antenna for Bluetooth is modeled by electromagnetic simulation software of CST and HFSS. The Bluetooth wireless communication system model has the advantage of low power, miniaturization and low cost to produce.