基于差分发射的近场耦合天线实用接口电路的设计

摘要

Antenna is used as the main component of the wireless communication ,w hose perform‐ance is directly related to the stability of the entire communication system can work reliably .Design of the interface circuit between the antenna and the card reader is directly related with the realization of wireless radio frequency communication .In this paper ,based on the original interface circuit ,designed the interface circuit more simple ,reliable and lower cost ,and can be achieved with a variety of cards on the market popular communication .The circuit is used for the campus card of a corporation ,card read‐er ,after many years of operation ,the system is stable and reliable .%天线作为射频通讯的接收部件，其性能的稳定性直接关系到整个通信系统能否可靠工作，而天线与读卡器之间的接口电路的设计直接关系着无线射频通信能否实现。文章在原有接口电路的基础上，设计出差分式的接口电路，其结构更加简单、工作更加可靠、抗干扰能力强、响应速度快且成本较低的接口电路，并且可以实现与市面上流行的多种卡类的通信。将该电路用于某公司的校园一卡通读卡器中，经过多年运行，系统稳定可靠。