UHF RFID systems have the largest market potentials, but are also the most difficult to implement.

其中超高频段是最具有市场潜力的频段，但是也是技术上最难实现的频段。

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Thee research results show that path loss models of backscatter RFID systems are differ from traditional wireless communication systems.

研究结果表明，反向散射RFID系统的路径损耗模型和传统无线通信系统的路径损耗模型有所区别。

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But whereas RFID systems transmit little more than an electronic bar code, NFC offers two-way communication and lets devices interact in more complex ways.

不过RFID系统只能传输很少的电子条形码，而NFC可以提供双向传输及设备间更复杂的沟通方式。

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Those same RFID systems enable retailers to monitor activity and re-order without any human interaction.

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Future revenue potential will come from selling services that help business customers set up RFID systems, according to Lanza.

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The researchers urged companies working on RFID systems to start thinking seriously about security measures to protect against future threats.

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