Hybrid Mode Wideband Patch Antenna Loaded With a Planar Metamaterial Unit Cell
Hybrid Mode Wideband Patch Antenna Loaded With a Planar Metamaterial Unit Cell
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DOI：
10.1109/tap.2011.2173114
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发表时间：
2012-02
影响因子：
5.7
通讯作者：
J. Ha;Kyeol Kwon;Youngki Lee;Jaehoon Choi
中科院分区：
文献类型：
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作者：
J. Ha;Kyeol Kwon;Youngki Lee;Jaehoon Choi
提出了一种加载平面超材料单元的宽带贴片天线。该超材料单元电池由数字间电容和互补裂环谐振器（CSRR）槽组成。对超材料单元电池的色散分析表明，串联电容的增加可以降低半波长谐振频率，从而减小天线的电尺寸。另外，随着指间指长增加，CSRR槽周围的环流分布产生TM01模式辐射，正常辐射模式为TM10模式。此外，TM01模式可以与TM10模式组合而没有模式失真。两种模式的杂交产生宽带特性（6.8%）和独特的辐射方向图，可与正交定位的两个独立偶极子天线相媲美。此外，即使天线的电气尺寸仅为0.24λ0×0.24λ0×0.02λ0，所提出的天线也实现了高效率（96%）和合理的增益（3.85 dBi）。
A wideband patch antenna loaded with a planar metamaterial unit cell is proposed. The metamaterial unit cell is composed of an interdigital capacitor and a complementary split-ring resonator (CSRR) slot. A dispersion analysis of the metamaterial unit cell reveals that an increase in series capacitance can decrease the half-wavelength resonance frequency, thus reducing the electrical size of the proposed antenna. In addition, circulating current distributions around the CSRR slot with increased interdigital finger length bring about the TM01 mode radiation, while the normal radiation mode is the TM10 mode. Furthermore, the TM01 mode can be combined with the TM10 mode without a pattern distortion. The hybridization of the two modes yields a wideband property (6.8%) and a unique radiation pattern that is comparable with two independent dipole antennas positioned orthogonally. Also, the proposed antenna achieves high efficiency (96%) and reasonable gain (3.85 dBi), even though the electrical size of the antenna is only 0.24λ0×0.24λ0×0.02λ0.