| 使用非均匀特异媒质覆层的高增益谐振腔天线 |
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| 引用本文： | 左 腾,谭菲菲,陈 星.使用非均匀特异媒质覆层的高增益谐振腔天线[J].太赫兹科学与电子信息学报,2015,13(4):601-604. |
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| 作者姓名： | 左 腾 谭菲菲 陈 星 |
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| 作者单位： | College of Electronics and Information Engineering，Sichuan University，Chengdu Sichuan 610065，China,College of Electronics and Information Engineering，Sichuan University，Chengdu Sichuan 610065，China and College of Electronics and Information Engineering，Sichuan University，Chengdu Sichuan 610065，China |
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| 摘 要： | 采用非均匀特异媒质覆层，设计了一种具有高增益特性的新型谐振腔天线。该谐振腔天线采用矩形微带贴片天线作为辐射单元，安装在金属谐振腔内，其谐振频率为10 GHz。为提高天线增益，将腔表面安装蚀刻在微带基板上，由周期性单元组成特异媒质覆层。迥异于常规的单元尺寸均匀一致特异媒质覆层，本文研制的非均匀特异媒质覆层包含9×9个矩形单元，单元大小渐变。仿真表明，与常规均匀特异媒质覆层相比，该新颖的非均匀特异媒质覆层相当大程度提升了天线定向辐射性能：天线增益提高1.2 dB(从20.3 dBi增加到21.5 dBi)，天线的旁瓣得到了抑制，主旁瓣比下降5 dB；同时，天线谐振频率和阻抗带宽等其他性能基本保持不变。
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| 关 键 词： | 谐振腔天线 非均匀特异媒质 高增益 |
| 收稿时间： | 2015/1/27 0:00:00 |
| 修稿时间： | 2015/3/12 0:00:00 |
A resonant cavity antenna with a non-uniform metamaterial superstrate |
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| ZUO Teng,TAN Feifei and CHEN Xing.A resonant cavity antenna with a non-uniform metamaterial superstrate[J].Journal of Terahertz Science and Electronic Information Technology,2015,13(4):601-604. |
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| Authors: | ZUO Teng TAN Feifei and CHEN Xing |
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| Abstract: | A Resonant Cavity Antenna(RCA) with a non-uniform metamaterial superstrate is proposed. A rectangular patch antenna, working at 10 GHz, is placed in a cavity as a primary source. A superstrate printed with square metal patches is placed in front of the antenna in order to increase the gain. Different from normal uniform metamaterial superstrate, the proposed structure consists of 9?9 units with different sizes. Simulation results demonstrate that the directivity of non-uniform metamaterial superstrate RCA increases by 1.2 dB(from 20.3 dBi to 21.5 dBi), and the side lobe is suppressed(the main-to-sidelobe ratio decreases by 5 dB), while the other properties like antenna resonant frequency and impedance bandwidth remain unchanged almost. |
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