RFID经典教程，适合新手或者是想要了解RFID的工程技术人员。-RFID classic tutorial for novice or want to understand RFID' s engineers and technicians.

手机射频电路原理，对想学习手机原理的朋友有点帮助-Mobile radio circuit, the principle of friends want to learn a little help mobile phone

现在物联网如此火热但是只能买别人现成的RFID节点来用 想不想自己做板 那么天线设计至关重要-Things are so hot but you can only buy ready-made RFID nodes to others want to make their own board with antenna design is critical that