This paper addresses the performance evaluation of a modified square loop antenna design for UHF RFID applications that is excited through a narrow feed line connected to a square loop, an impedance matching network. The square loop dimensions are modified to reach a conjugate impedance matching. A gap is fixed between the feed-lines to link the chip. To achieve impedance matching, the structures of the feed-line are optimized accordingly. In addition, the antenna consists of a straightforward geometry. An 11.9-meter maximum read range is achieved using a compact size of 80 × 44 mm2 and 3.2 W for the effective isotropic radiated power. Additional findings reveal that the proposed tag antenna is able to provide a stable resonance response in the near field of a large metallic surface.
展开▼
机译：本文介绍了针对UHF RFID应用的改进型方形环形天线设计的性能评估，该设计是通过连接到方形环路（阻抗匹配网络）的窄馈线激励的。修改方形环路的尺寸以达到共轭阻抗匹配。馈线之间固定有缝隙以连接芯片。为了实现阻抗匹配，相应优化了馈线的结构。另外，天线由简单的几何形状组成。紧凑的尺寸为80×44 mm 2 ，有效各向同性辐射功率为3.2 W，可实现11.9米的最大读取范围。其他发现表明，提出的标签天线能够在大金属表面的近场中提供稳定的谐振响应。
展开▼
