用于超高频RFID应用的高增益法布里-帕姆罗特圆极化腔天线

2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM) Pub Date : 2014-07-13 DOI:10.1109/ANTEM.2014.6887737

D. Hamzaoui, F. Djahli, T. Vuong, G. Kiani

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引用次数: 3

摘要

提出了一种用于超高频射频识别的法布里-帕姆罗腔天线。首先，设计圆极化天线，在868 MHz时获得9.82 dB的高增益。然后设计了一个六角形贴片型频率选择面，并将其置于主天线上方作为部分反射面，以提高其增益。结构的整体尺寸约为(1.73 λ0 * 1.5 λ0 * 0.53 λ0)，其中λ0为自由空间工作波长。仿真结果表明，在868 MHz的波束宽度为±33°时，实现增益为13.12 dB，增益带宽为1.61%，轴比小于3 dB。该空腔反射天线的效率为96.13%，旁瓣电平(SLL)小于-14 dB。

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High gain Fabry-Pérot circular polarization cavity antenna for UHF RFID applications

A Fabry-Pérot cavity antenna for UHF RFID application is presented. First, a circularly polarized antenna is designed to obtain a high gain of 9.82 dB at 868 MHz. Then a hexagonal patch type frequency selective surface is designed and placed above the primary antenna to be used as partially reflective surface (PRS) to enhance its gain. The overall dimension of the structure is about (1.73 λ₀ * 1.5 λ₀ * 0.53 λ₀), where λ₀ is the free-space operating wavelength. The simulation results yield a 13.12 dB realized gain, 1.61 % 3 dB gain bandwidth and an axial ratio less than 3 dB with a ±33° beamwidth at 868 MHz. The cavity reflex antenna exhibits a good efficiency of 96.13% and side lobe level (SLL) less than -14 dB.

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2014 16th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM)

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