In the last post we discussed about the importance of the long-distance reading capability of the RAIN RFID technology stating that this is one of the main aspects of the technology success. But this is not the whole story.<\/p>\n
Many applications do not require reading distances of more than 1 mt hence HF\/NFC or LF RFID seem to be the right technologies to implement solutions for those scenarios. So why and when RAIN RFID<\/span><\/strong> should be preferable in sub-meter reading distance applications<\/span><\/strong>?<\/p>\n There are some characteristics of RAIN RFID that makes it a good choice even in medium\/short range applications:<\/p>\n Anyway, there are some specific applications where the required reading distance is even less and, sometimes, it is required a limitation to few centimeters or even to read at contact (contactless applications) i.e. where the reader antenna and the tag are put in contact, like when you tap a NFC tag with your smartphone.<\/p>\n For these applications the natural choice is NFC and, in many cases, it\u2019s also the right choice, but there are applications where RAIN RFID technology would fit better or be the only viable solution.<\/p>\n As we have seen in our last post, RAIN RFID technology uses electromagnetic field while LF\/HF\/NFC RFID use magnetic field to exchange power and data, but this is not true in all the cases. Magnetic field, and hence inductive coupling, can be used also at the UHF frequencies of RAIN RFID technology with some advantages.<\/p>\n At UHF frequencies the efficiency of power transmission is higher so, to reach the same reading distance, the dimension of the tag antenna can be much smaller for RAIN RFID than LF\/HF\/NFC<\/span><\/strong> and, most of the time, UHF requires just one coil for the purpose (that, again, means a single layer tag). Smaller tags, some of them just 1mm. by 2mm., open a new range of use cases. Examples are the identification of small objects like pharmaceutical vials or embedding tags into smartwatches, surgery tools, climbing carabiners or any other small object that need to be identified and\/or authenticated.<\/p>\n In the RFID jargon this is called near field RAIN RFID technology where readers and chips for tags are exactly the same of the ones used for far field (long distances) but both reader and tag antennas need to be specifically designed to obtain the maximum performances from the inductive coupling.<\/p>\n","protected":false},"excerpt":{"rendered":" In the last post we discussed about the importance of the long-distance reading capability of the RAIN RFID…<\/p>\n","protected":false},"author":1,"featured_media":16888,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[121],"tags":[],"class_list":["post-16891","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-it"],"acf":[],"yoast_head":"\n\n