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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >Bandwidth and gain-enhanced composite right/left-handed antenna for ultra-wideband applications
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Bandwidth and gain-enhanced composite right/left-handed antenna for ultra-wideband applications

机译：带宽和增益增强复合右/左手天线，用于超宽带应用

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摘要

A coplanar waveguide-fed metamaterial antenna is presented for ultrawideband(UWB) applications. The proposed antenna is designed with singleunit-cell composite right/left-handed transmission line (CRLH-TL) loadedwith a split-ring resonator (SRR). The UWB characteristic is obtained by mergingthe zeroth-order resonance of CRLH-TL with two additional resonancesdue to the ground plane and SRR respectively. Subsequently, a partial reactiveimpedance surface is embedded on the rear side of the proposed antenna toenhance the realized gain without affecting the UWB response. The overallsize of the antenna is 0.241λ_o × 0.267λ_o × 0.013λ_o (28.8 × 32 × 1.6 mm~3), whereλ_o is the free space wavelength at 2.51 GHz. The measured results indicate -10 dB fractional bandwidth of 139.19% (2.51-14 GHz) with realized gains of2.3, 4.6, and 6 dBi at the resonant frequencies 4, 7.84, and 10.29 GHz respectively.The measured peak realized gain is 6.6 dBi at 10.6 GHz. The radiationefficiency is above 63.85% for the entire UWB range with a peak value of86.84%. A fairly stable group delay with variation within 1 ns is obtainedthroughout the operating frequency band. A good agreement has beenobserved between the measured and simulated results.
机译：提出了一种共面波导馈电超材料天线，用于超宽带（UWB）应用。拟议中的天线设计为单单元复合右/左手传输线（CRLH-TL），并装有开环谐振器（SRR）。 UWB特性是通过将CRLH-TL的零阶谐振与分别归因于地平面和SRR的两个附加谐振合并而获得的。随后，将部分电抗阻抗表面嵌入拟议天线的背面，以增强实现的增益，而不影响UWB响应。天线的整体尺寸为0.241λ_o×0.267λ_o×0.013λ_o（28.8×32×1.6 mm〜3），其中λ_o是2.51 GHz的自由空间波长。测量结果表明，在谐振频率4、7.84和10.29 GHz处，-10 dB分数带宽为139.19％（2.51-14 GHz），实现增益分别为2.3、4.6和6 dBi。测得的峰值实现增益为6.6。 10.6 GHz时的dBi。在整个UWB范围内，辐射效率均高于63.85％，峰值为86.84％。在整个工作频带内获得了一个相当稳定的群延迟，其变化在1 ns内。在测量结果和模拟结果之间已观察到良好的一致性。

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