| NiCuZn铁氧体电磁屏蔽片的尺寸设计与表征 |
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| 引用本文： | 颜铄清,吴筱菡,刘卫沪,李寅瑞,聂彦,王鲜,冯则坤.NiCuZn铁氧体电磁屏蔽片的尺寸设计与表征[J].磁性材料及器件,2015(2):35-38. |
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| 作者姓名： | 颜铄清 吴筱菡 刘卫沪 李寅瑞 聂彦 王鲜 冯则坤 |
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| 作者单位： | 华中科技大学 光学与电子信息学院,湖北武汉,430074 |
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| 摘 要： | 采用固相反应法制备NiCuZn系铁氧体粉料,以此粉料为原料采用流延法制备了不同尺寸(长、宽、厚)的电磁屏蔽片。测试并研究了RFID天线的S11(天线回波损耗)曲线以及可读写距离与紧贴其背后的屏蔽片的厚度及长宽尺寸之间的关系。结果表明,改变屏蔽片的厚度与长宽尺寸以及经过裂片处理,可以调节S11曲线吸收峰中心频率的偏移。吸收峰中心频率偏移的减小可以提高RFID卡可读写距离的恢复比例。
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| 关 键 词： | 近场通讯(NFC) NiCuZn铁氧体 电磁屏蔽片 S11曲线 可读写距离 |
Design and characterization of NiCuZn ferrite electromagnetic shielding sheet |
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| YAN Shuo-qing,WU Xiao-han,LIU Wei-hu,LI Yin-rui,NIE Yan,WANG Xian,FENG Ze-kun.Design and characterization of NiCuZn ferrite electromagnetic shielding sheet[J].Journal of Magnetic Materials and Devices,2015(2):35-38. |
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| Authors: | YAN Shuo-qing WU Xiao-han LIU Wei-hu LI Yin-rui NIE Yan WANG Xian FENG Ze-kun |
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| Abstract: | The NiCuZn ferrite powder was prepared by solid-state reaction method, and electromagnetic shielding sheet with different thickness and size was produced by tape casting using the powder. Effects of thickness of the shielding sheet and size of the antenna coil on the S11 curve of RFID card were studied, and also effects of thickness of shielding sheet and size of length and width on the reading/writing distance were researched. It was found that the deviation of absorption peak frequency of the S11 curve can be adjusted by changing the thickness of shielding sheet , altering the coil size and applying cracking process. The reduction of the deviation of absorption peak frequency of the S11 curve can also increase reading/writing distance of RFID card. |
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| Keywords: | near field communication (NFC) NiCuZn ferrite electromagnetic shielding sheet S11 curve read/write distance |
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