论文部分内容阅读
随着RFID的飞速发展,高频RFID突破读取距离的瓶颈。凭借其读取距离远、成本低的优势,高频RFID技术使食品追溯更加容易。通常我们认为按照绝大多数国家的无线电法规,非超高频(RFID射频快报注:900MHZ附近的免许可频段)RFID的工作范围只有1米。诚然,如果RFID标签安装有电池,它的工作范围会更大,这对于交通工具和拖车是可行的解决方案。然而,这些所谓的有源标签寿命有限,价格昂贵,相对较大并且容易损坏。这意味着应美国和欧洲零售巨头以及美国军方的要求,超高频被动标签已经成为食品的托盘和容器,以及其他产品的标准。
With the rapid development of RFID, high-frequency RFID break through the bottleneck of reading distance. With its read distance, low cost advantages, high-frequency RFID technology makes food traceability easier. In general, we think that in the vast majority of countries’ radio regulations, the operating range for non-UHF RFID (unlicensed bands around 900 MHz) is only 1 meter. It is true that if the RFID tag has a battery installed, it will have a wider operating range, which is a viable solution for vehicles and trailers. However, these so-called active tags have limited life, are expensive, are relatively large and easily damaged. This means that at the request of the U.S. and European retail giants and the U.S. military, UHF passive tags have become the norm for pallets and containers of food and other products.