LZ对频率要要求吗？
用900M的话可以考虑奥地利微电子（AMS）的AS399X系列读卡芯片。
您可以到www.austriamicrosystems.com了解到AS3990和AS3991的资料。
手持式读卡器一般都是用线极化天线吧。在使用线极化天线的情况下，我们自己实测AS3991的读卡距离只有1m多，而AS3992的距离有7m。所以，我推荐的芯片是AS3992，这颗芯片要在本月底量产。我们现在有AS3992 DemoBoard。
关于900M的RFID，我们11月2日有一个Seminar（免费），11月3日有一个Training（免费），都在上海。由AMS原厂的工程师讲课（有翻译）。如果您有兴趣，请和我联系。下面是Seminar和Training的内容。
Seminar内容: （AMS原厂的人英文讲课，有翻译）
AMS company introduction
● RFID general overview
● RFID active vs passive;- our products
● UHF passive specialties read range and explain link budget
- RFID analogue Front-end and reader input structure and requirements
- Multi reader environment
● Gen2 Protocol
● UHF Reader AS3990 Applications and reference Systems:
- Reader setup and configurations
- AS3990 Firmware overview
- AS3990 EV board introducing and demo.
● Demonstration and Q&A
Training內容: （AMS原厂的人英文讲课，有翻译）
Focus: Application training for UHF developers
Hardware:
general block diagram and needed external components.
passive components inclusive loop filter
crystal requirement
UHF specifics
matching network
balun
circulator / coupler
Power amplifier
layout rules
Guideline on hand solder a QFN64 device
What are the specific's on the reference designs and how they can help you to speed up the design
Software:
What the Software can do for us.- What are the features the are already integrated.
Layers of the Software
Host to reader Communication Interface commands
defines to tailor the Software
Needed steps for porting the software
GUI:
setup the compiler
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