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A Wideband Circular Polarization Antenna for UHF Tags

机译:用于UHF标签的宽带圆极化天线

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In this paper, a low profile antenna for UHF Radio Frequency Identification (RFID) Tags with wideband circular polarization (CP) is proposed to solve the polarization mismatch in RFID systems. This antenna consists of two orthogonal dipole with unequal slots for realizing circular polarization radiation and a new matching network. For reducing size, a row-shaped tip loading is used. The measurement result of return loss bandwidth is 40 MHz (895-935 MHz) and 3-dB axial ratio bandwidth is 25 MHz (910-935 MHz). The overall size of antenna has been reduced to (0.19 lambda(0) x 0.19 lambda(0) x 0.005 lambda(0)) at 915 MHz compared to previous works. Besides, other advantages of this design are wideband impedance matching and CP bandwidth.
机译:为了解决RFID系统中的极化不匹配问题,提出了一种超薄天线,用于宽带圆极化(CP)的UHF射频识别(RFID)标签。该天线由两个不等缝的正交偶极子和一个新的匹配网络组成,这些偶极子用于实现圆极化辐射的时隙不相等。为了减小尺寸,使用了行形的尖端负载。回波损耗带宽的测量结果为40 MHz(895-935 MHz),3 dB轴向比率带宽为25 MHz(910-935 MHz)。与以前的工作相比,在915 MHz时,天线的整体尺寸已减小至(0.19 lambda(0)x 0.19 lambda(0)x 0.005 lambda(0))。此外,该设计的其他优点是宽带阻抗匹配和CP带宽。

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