A retransmission chipless tag with multiple U-shaped slot resonators is proposed to cut down the cost of traditional tags with chips. Multiple side-by-side U-shaped slot structures of different lengths are printed on the microstrip line, and the two terminals of the microstrip line are connected correspondingly with two orthogonal ultra-wideband (UWB) transceiver antennas to form the retransmission chipless tag. The U-shaped slot resonator has high Q values and narrow impedance bandwidth. The bandwidth that each resonator adds to the protection bandwidth is 300 MHz. Several 6-bit coding U-shaped slot resonator chipless tags are designed and fabricated for comparison and measurement. Results show that the simulation and the measurement are in agreement. The slot width of the U-shaped slot resonator and the distance between the resonators are reduced, resulting in deepened spectrum notch depth of the resonator. Decreasing the dielectric constant of the substrate or increasing the thickness of the substrate increases the spectrum notch depth of the resonator.

中文翻译：

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无芯片标签设计中使用的高Q槽谐振器

为了减少传统的带有芯片的标签的成本，提出了具有多个U形缝隙谐振器的重发无芯片标签。微带线上印有多个不同长度的并排的U形缝隙结构，微带线的两个端子分别与两个正交的超宽带（UWB）收发器天线相连，形成无重发的无芯片标签。U形缝隙谐振器具有较高的Q值和较窄的阻抗带宽。每个谐振器增加到保护带宽的带宽为300 MHz。设计和制造了几种6位编码的U形缝隙谐振器无芯片标签，用于比较和测量。结果表明，仿真与测量结果吻合。U形缝隙谐振器的缝隙宽度和谐振器之间的距离减小，导致谐振器的频谱陷波深度加深。减小衬底的介电常数或增大衬底的厚度会增加谐振器的频谱陷波深度。