说明：  RFID是现在最火爆的技术之一，专家学者一致看好它的发展前景。而该系统的核心器件之一的读写器是怎么设计的呢，看看这篇文章或许会对你有所启示
(RFID is the most explosive one of the technical experts and scholars unanimously optimistic about its prospects for development. The system, one of the core devices Reader is how design does, perhaps read this article you may find inspiration)