[分享]Antenna Circuit Design for RFID Applications

Antenna Circuit Design for RFID Applications.pdf (1017 K) 下载次数:172 Author: Youbok Lee, Ph.D. Microchip Technology Inc. Passive RFID tags utilize an induced antenna coil voltage for operation. This induced AC voltage is rectified to provide a voltage source for the device. As the DC voltage reaches a certain level, the device starts operating. By providing an energizing RF signal, a reader can communicate with a remotely located device that has no external power source such as a battery. Since the energizing and communication between the reader and tag is accomplished through antenna coils, it is important that the device must be equipped with a proper antenna circuit for successful RFID applications. An RF signal can be radiated effectively if the linear dimension of the antenna is comparable with the wavelength of the operating frequency. However, the wavelength at 13.56 MHz is 22.12 meters. Therefore, it is difficult to form a true antenna for mo .. n55Pv3}C  
6:GTD$Uz.  

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thx............

txt 打不开呀呀呀

是PDF格式的文件，内容不错。

太感谢楼主了，这篇文章非常非常好，强烈推荐搞13.56MHz线圈天线的人仔仔细细地看，认真读懂每句话。 L !4t[hhe=  
PS：我是看完了之后特定回来找到该片文章来评论的

看看，学学，正好想玩玩线圈天线，谢谢分享 ~#\i!I;RY}  

haohaoxuexixuexi

嗯 看看去~~谢谢

Good!!!!!!!!!!!!!!!!!!!

好猛喔  謝大大