[问答]

CR95HF天线设计问题

问答对人有帮助，内容完整，我也想知道答案 0 你好，我正在和我一起工作。我有一些问题。 1.天线电感的亨利值可以达到多少读取范围。任何人都可以建议。？ 2.对于良好的读取范围，是否需要天线电感和标签天线电感相同？ 3.它是否同时支持多标签检测？如果是，那么一次有多少个标签？谢谢＆amp;问候，玛丽莎戴夫以上来自于谷歌翻译以下为原文 Hello, I am working with . I have some questions regarding it. 1. How much read range can be achieved with how much Henry of antenna inductance. Can any one Please suggest.? 2. Is it required that Antenna inductance and Tag antenna inductance should be same for good read range.? 3. Does it support multi tag detection at same time ? If yes then how many tags at a time? Thanks & Regards, Margisha Dave 0
2019-7-26 16:01:05　　评论淘帖0 邀请回答您可以邀请以下用户，快速回答问题 × wang21cj 该类别下有 46 个回答。邀请回答 chm5 该类别下有 42 个回答。邀请回答新星之火12138 该类别下有 42 个回答。邀请回答 hgimtk 该类别下有 34 个回答。邀请回答 HengDu 该类别下有 31 个回答。邀请回答 hwp0415229 该类别下有 29 个回答。邀请回答麻酱该类别下有 28 个回答。邀请回答 jghgfdssas 该类别下有 28 个回答。邀请回答可口可甜该类别下有 28 个回答。邀请回答 kingnet6688 该类别下有 28 个回答。邀请回答云汉007 该类别下有 27 个回答。邀请回答 andyfly7 该类别下有 27 个回答。邀请回答法规处发该类别下有 27 个回答。邀请回答成长的小师弟该类别下有 27 个回答。邀请回答 bluepink 该类别下有 27 个回答。邀请回答 jiangwenwen 该类别下有 27 个回答。邀请回答 ggfvxv 该类别下有 26 个回答。邀请回答颜刚YanG 该类别下有 26 个回答。邀请回答 gXDhn 该类别下有 26 个回答。邀请回答柱子图宁该类别下有 26 个回答。邀请回答举报廉凌刚相关推荐 • CR95HF具有哪些特性参数应用？ 1903 • 有哪位大神可以分享CR95HF的PCB指南吗？ 310 • 是否可以使用单独的PCB设计CR95HF的NFC天线 2355 • CR95HF如何测量定制天线中的电流？ 1375 • CR95HF校准问题 1235 • CR95HF不响应任何命令 1429 • 如何使用CR95HF模拟NDEF？ 428 • 使用CR95HF可能检测到天线场内标签的移除吗？ 1406 • 有谁能帮忙设计柔性天线的CR95HF天线调谐电路吗 329 • CR95HF达到的最大范围是多少？ 829 1个回答

答案对人有帮助，有参考价值 0 你好， 1）RFID阅读器的读取范围取决于阅读器天线，还取决于标签天线尺寸，调谐和标签IC协议和功耗。因此，在不知道系统的情况下很难回答它但是，我们提供了一些工具来帮助客户设计他们的系统来自e-Design套件的NFC天线模块，请访问https://my.st.com/analogsimulator/flex_app/bin/eds_antenna_design.html?msg=%7B%22action%22%3A%22new_design%22%7D 允许根据其尺寸评估天线电感STSW-95HF03：CR95HF EMI滤波器计算excel表http://www.st.com/content/st_com/en/products/embedded-software/st25-nfc-rfid-software /stsw-95hf003.html 允许优化CR95HF调谐电路并计算读取器天线产生的场强。即使这个工具没有考虑到标签和阅读器之间的相互耦合效应，估计功率范围可能会有所帮助。带有M24L-DISCOVERY套件的CR95HF演示板具有34x47mm / 2转/ 0.5ohm ~424nH天线和NUCLEO-NFC03A1板具有a 34x47mm / 4转/0.8ohm~1120nH天线。第一个天线示例提供高场强，这对于最大化M24LR04E-R ISO15693I²C/ NFC芯片所展示的能量收集功能的性能非常重要。具有4匝的第二天线在转弯数和阻抗方面提供了良好的折衷，以在每种协议中在读取模式下最大化性能。这两种参考设计允许最大9 cm的读取范围，信用卡大小为ISO 15693标签，6 cm为ISO14443标签。 2）读卡器和标签天线不需要具有相同的电感。读写器天线电感通常小于标签天线阻抗。 3）多标签检测是CR95HF支持的RF协议的一部分。但是它不是由CR95HF自动管理的，它必须使用CR95HF的命令集在微控制器固件级别进行管理。此库存过程（逐步标记UID检测）取决于标签可见性（检测量，通信期间的冲突）和协议。最好的祝福， NFC / RFID支持以上来自于谷歌翻译以下为原文 Hello, 1) RFID readers read range depends on reader antenna but also on Tag antenna dimensions, tuning , and tag IC protocol and power consumption. As a consequence it is difficult to answer to predict it without knowing the system However we provide some tools to help customers to design their system NFC antenna module from e-Design suite at https://my.st.com/analogsimulator/flex_app/bin/eds_antenna_design.html?msg=%7B%22action%22%3A%22new_design%22%7D allows to evaluate the antenna inductance based on its dimensions the STSW-95HF03: CR95HF EMI filter calculation excel sheet at http://www.st.com/content/st_com/en/products/embedded-software/st25-nfc-rfid-software/stsw-95hf003.html allows to optimize the CR95HF tuning circuit and calculated the field strenght generated by the reader antenna. even if this tool doeas not take into account the mutual coupling effect between a tag and the reader, it may be helpful to estimate the powering range. The CR95HF demo board delivered with the M24L-DISCOVERY kit features a 34x47mm/2 turns/0.5ohm~424nH antenna and NUCLEO-NFC03A1 board features a 34x47mm/4 turns/0.8ohm~1120nH antenna. First antenna example provides a high field strength, important to maximize the performance of Energy harvesting fonctionality demonstrated with M24LR04E-R ISO15693 IÂ²C/NFC chip. Second antenna with 4 turns provides a good compromise in turn number and impedance to maximise performance in read mode in every protocol. these 2 reference design allows up to 9 cm read range with credit card size ISO 15693 tags and 6 cm with ISO14443 tags. 2) There is no need to have same inductance for reader and tag antenna. Reader antenna inductance is usually less than tags antennas impedance. 3) Multi tag detection is part of RF protocols supported by the CR95HF. However it is not managed automatically by CR95HF and It has to be manged at micro controller firmware level using the command set of CR95HF. This inventory procedure (step by step tag UID detection) depends on tag visibility (detection volume, collision during communication) and protocol. best regards, NFC/RFID Support

2019-7-26 16:11:15 评论举报樊周依