资料介绍
AN2866如何设计一个13.56 MHz的定制标签天线
AN2866
Application note
How to design a 13.56 MHz
customized tag antenna
Introduction
RFID (radio-frequency identification) tags extract all of their power from the reader’s field.
The tags’ and reader’s antennas form a system of coupled inductances as shown in
Figure 1. The loop antenna of the tag acts as a transformer’s secondary.
The efficient transfer of energy from the reader to the tag depends on the precision of the