一种用于主动式RFID标签的单馈双模天线

A Single-Feed Dual-Mode Antenna for Active RFID Tag Application

提出了一种用于主动式射频识别标签的单馈双模天线。本天线包括一个FR4介质板上的开槽贴片,一个馈电微带线和一个厚度只有6mm的泡沫垫片。此天线在自由空间以偶极子模式工作,当置于金属表面时以贴片模式工作。设计出的天线原型的阻抗带宽在自由空间时为390MHz(2.28~2.67GHz),置于金属表面时为470MHz(2.32~2.79GHz)。文章给出了在两种情况下测量所得的辐射方向图,增益以及辐射效率。

This paper proposes a compact single-feed dual-mode antenna for active radio frequency identification(RFID) tag application.The proposed antenna consists of a slotted patch on an FR4 substrate, a feeding microstrip li ne, and a foam spacer with a thickness of only 6mm.It operates as a dipole in free space and as a patch when it is placed on a metallic sur face.A prototype that can provide an impedance bandwidth of 390 MHz(2.28~2.67GHz) in free space and 470MHz(2.32~2.79GHz) on a metallic surface is built and measured.The measured radiation patterns, peak gains, and radiation efficiencies in these two scenarios are provided.