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PIER PIER B PIER C PIER M PIER Letters
2019-06-10
Performance Improvement and Antenna Design of Left-Handed Material Units Based on Topological Deformations
By
Baiqiang You,

    Prof. Baiqiang You

    Department of Electronic Engineering

    Xiamen University

    China

    Homepage

Mengyin Dong,

    Dr. Mengyin Dong

    Department of Electronic Engineering

    Xiamen University

    China

    Homepage

Jianhua Zhou,

    Prof. Jianhua Zhou

    Department of Electronic Engineering

    Xiamen University

    China

    Homepage

Haike Xu

    Dr. Haike Xu

    Department of Electronic Engineering

    Xiamen University

    China

    Homepage

Progress In Electromagnetics Research, Vol. 165, 13-33, 2019
doi:10.2528/PIER19011603
Abstract
In this paper, by applying topological theory, we evaluate some left-handed unit structures. Based on the classification of topological deformation, the laws and characteristics of potential electromagnetic parameters are captured. The original left-handed material unit is realized by using a circular C-shaped coupling ring, the whose whole size is 10 × 10 × 0.5 mm3. Through three kinds of topological deformations, to explore the influence of topology on antenna performance, the electromagnetic parameters and left-handed characteristics of the original and modified units are compared and analyzed. For the designed handshake-shaped unit structure, simulation analysis predicts that dual-frequency, or even multi-band left-handed characteristics, can be achieved. To expand the structural performance of the handshake-shaped unit, an annular line for coupling enhancement is added inside the U-shaped structure to form an integrally coupled annular unit structure. Simulation results show that, with amplitudes of reflection coefficients of -27.1 dB and -14.5 dB, the resonance points of the improved unit structure are 3.57 GHz and 5.64 GHz, respectively. Loading the unit structure with a dual-band left-handed characteristic, a UWB antenna is designed and analyzed in detail. Through simulation, antenna performance is most affected by interference within the range of 2.5 ~ 5.0 GHz, which coincides with the double negative frequency band of the loaded left-handed structural unit. The notch frequency band of the designed UWB antenna, which is much wider than traditional notch antennas, is 3.62 ~ 4.54 GHz, with a notch bandwidth of 920 MHz.
Citation
Baiqiang You, Mengyin Dong, Jianhua Zhou, and Haike Xu, "Performance Improvement and Antenna Design of Left-Handed Material Units Based on Topological Deformations," Progress In Electromagnetics Research, Vol. 165, 13-33, 2019.
doi:10.2528/PIER19011603
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