加载线阵“零”折射率材料改善喇叭天线指向性

发布时间：2018-08-15 11:56

【摘要】：设计制备了周期性金属线阵"零"折射率材料,使用S参数提取法,仿真得到在9.40GHz处,该"零"折射率材料的等效折射率的实部为0.05,虚部为0.019.进行了波导仿真实验,实验结果证实所设计制备的"零"折射材料在对应频点具备"零"折射率的特性.将其加载到喇叭天线口来改善喇叭天线的指向性,仿真发现加载"零"折射率材料之后,喇叭天线的指向性得到了提升:E面的半功率波束宽度从18.0°变为17.6°,E面旁瓣由-8.6dB降低为-19.5dB,H面的半功率波束宽度由18.1°减少为13.4°,H面旁瓣由-26.0dB降低为-27.1dB,天线的增益由原来的19.7dB增加到了21.1dB,从天线的喇叭口辐射出的波形也改善为近似平面波.实物对比试验也表明加载周期性金属线阵"零"折射率材料的喇叭天线E面和H面的辐射宽度明显变窄.
[Abstract]:The "zero" refractive index material of periodic metal linear array is designed and fabricated. By using S-parameter extraction method, the equivalent refractive index of the "zero" refractive index material is 0.05 in real part and 0.019 in virtual part in 9.40GHz. The experimental results show that the "zero" refraction material has the characteristic of "zero" refractive index at the corresponding frequency. To improve the directivity of the horn antenna by loading it into the antenna mouth of the horn, the simulation shows that after loading the "zero" refractive index material, The directivity of the horn antenna shows that the half power beam width of the lifting: e plane is reduced from 18.0 掳to 17.6 掳E plane sidelobe from -8.6dB to -19.5dBN H plane from 18.1 掳to 13.4 掳H plane sidelobe from -26.0dB to -27.1dB, and the gain of antenna is reduced from -27.1dB.The antenna gain is reduced from -18.6dB to -19.5dBH side lobe from 18.1 掳to 13.4 掳H sidelobe from -26.0dB to -27.1 dB. The 19.7dB is increased to 21.1 dB, and the waveform radiated from the horn mouth of the antenna is improved to approximate plane wave. The experimental results also show that the radiative width of the E and H surfaces of the horn antenna loaded with the periodic metal linear array "zero" refractive index material is obviously narrowed.
【作者单位】：南京大学物理学院;
【基金】：总装备部预研基金(9140C070402140C07)
【分类号】：TN820

【相似文献】