加大线圈的输出功率~

用支持15693协议的芯片，读卡距离会好一点

ISO 18000的比较方便，最大支持1.5m的读卡距离，用在图书馆出入口、自动餐盘结账之类的较多，下面是NXP的 ICODE介绍

ICODE is a leading brand for smart, high-frequency (HF) label solutions, with billions of ICs in the field. The vicinity RFID solution is ISO/IEC 15693 and ISO/IEC 18000-3 compliant, and follows NFC Forum Tag Type 5 specifications. ICODE provides an operating range of up to 1.5 m with long range readers, additional read range vs ISO/IEC 14443 with standard ISO/IEC 15693 readers for extra small form factors and NFC phone readability: ICODE product variants come with a range of valuable features, such as protection for EAS, Application Family Identifier (AFI), memory access and privacy.

ICODE products are widely used in:

Library management
Consumable and accessory identification
Brand protection and anti-counterfeiting
Supply chain visibility and control
Industrial

前段时间，小米的NFC好像做到了1米。。？

感谢分享