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    • 1. 发明专利
    • Wireless communication system and wireless communication method
    • 无线通信系统和无线通信方法
    • JP2008017452A
    • 2008-01-24
    • JP2007130849
    • 2007-05-16
    • Nec Corp日本電気株式会社
    • MURAYAMA HIROKIHATAKEYAMA SHIGERUHIRANO KOICHIYAMAZAKI SHIGERU
    • H04B5/02B65G1/137G06K17/00G06K19/07H04B1/59
    • G06K7/10346G06K7/10178G06K7/10336H01Q3/02H01Q15/14H01Q15/18
    • PROBLEM TO BE SOLVED: To securely perform communication between an antenna and an RFID tag. SOLUTION: There are generated an interface area with an increased electric field level and an interface area with a decreased level, due to reflections at the upper and lower reflection plates. There are two reflective faces in each reflection plate, which are joined while being shifted from each other by 1/4 wavelength of the electromagnetic wave. Since the two reflective faces are being shifted, the interface area with a decreased electric field level moves on a production line according to a move of a dolly transporting the article. Thus, even if the RFID tag on the article passes through the interference area with a decreased electric field level in a first-half section, it comes to pass the point with recovered electric field level in a latter-half section. The antenna therefore can securely communicate with the RFID tag. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:安全地执行天线和RFID标签之间的通信。 解决方案:由于上反射板和下反射板上的反射,产生了具有增加的电场电平的界面区域和具有降低的电平的界面区域。 每个反射板中有两个反射面,它们在电磁波的1/4波长彼此移位的同时相互连接。 由于两个反射面正在移动,所以具有降低的电场强度的界面区域根据搬运物品的移动而在生产线上移动。 因此,即使物品上的RFID标签在前半部分中通过具有降低的电场电平的干扰区域,则在后半部分中通过具有恢复的电场电平的点。 因此,天线可以安全地与RFID标签通信。 版权所有(C)2008,JPO&INPIT