Wideband Compact CPW-Fed Circularly Polarized Antenna for Universal UHF RFID Reader
Wideband Compact CPW-Fed Circularly Polarized Antenna for Universal UHF RFID Reader
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DOI：
10.1109/tap.2015.2443156
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发表时间：
2015-06
影响因子：
5.7
通讯作者：
R. Cao;Shun-Chuan Yu
中科院分区：
文献类型：
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作者：
R. Cao;Shun-Chuan Yu
提出了一种紧凑型圆极化缝隙天线，与尺寸相近的天线相比，具有更宽的工作带宽。该天线专为通用超高频(UHF)射频识别(RFID)读取器应用而设计。天线采用L馈线馈电的共面波导结构。为了实现良好的阻抗匹配和宽带CP操作，在地平面的圆形槽中插入两条L形状的带状线。10分贝回波损耗带宽为380 MHz(618~998 MHz，47.0%集中在808 MHz)。测得3分贝轴比带宽约为332 MHz(791~1123 MHz，其中34.7%集中在957 MHz)。天线的总尺寸为120×120×0.8 mm~3。
A compact circularly polarized slot antenna is proposed in this communication, which has a much wider operation bandwidth compared to the antennas with similar sizes. This antenna is designed for universal ultrahigh frequency (UHF) radio-frequency identification (RFID) reader applications. The antenna is coplanar waveguide (CPW) fed by an L-shaped feeding line. To achieve good impedance matching and broadband CP operation, two L-shaped strip lines are inserted into the circular slot in the ground plane. The measured 10-dB return loss bandwidth is 380 MHz (618-998 MHz, 47.0% centered at 808 MHz). The measured 3-dB axial ratio bandwidth is about 332 MHz (791-1123 MHz, 34.7% centered at 957 MHz). The overall size of the antenna is 120 × 120 × 0.8 mm3.