Optimization of Meander Line Antenna Considering Coupling Between Nonlinear Circuit and Electromagnetic Waves for UHF-Band RFID
Optimization of Meander Line Antenna Considering Coupling Between Nonlinear Circuit and Electromagnetic Waves for UHF-Band RFID
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DOI：
10.1109/tmag.2010.2089606
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发表时间：
2010-05
影响因子：
2.1
通讯作者：
Yuta Watanabe;Kota Watanabe;Hajime Igarashi
中科院分区：
文献类型：
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作者：
Yuta Watanabe;Kota Watanabe;Hajime Igarashi
针对含有非线性电路的无源IC标签，提出了弯折线天线的优化设计方法。本文采用时域有限差分法（FDTD）求解电磁波与非线性电路的耦合方程，对Cockcroft-Walton电路加载的标签天线进行了分析。采用微遗传算法（μ GA）对天线形状进行优化，使Cockcroft-Walton电路的输出电压最大化。通过截断瞬态计算，有效地抑制了优化过程中的计算负担。引入了一个准则来评估截断引起的误差。该方法得到的最优MLA与偶极子天线相比具有更大的输出电压。
This paper presents optimization of meander line antennas (MLA) for passive IC tags which contain nonlinear circuits. In the present analysis, the tag antenna loaded by the Cockcroft-Walton circuit is analyzed by solving coupling equations for electromagnetic waves and nonlinear circuit with FDTD method. The antenna shape is optimized so that the output voltage of the Cockcroft-Walton circuit is maximized using the micro genetic algorithm (μ GA) . The computational burden in the optimization processes is effectively suppressed by truncating the transient computations. A criterion is introduced to evaluate the errors caused by the truncation. The present method yields the optimal MLA which has the greater output voltage in comparison with the dipole antenna.