现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2014年
5期
77-79,82
,共4页
高阻抗表面%阿基米德螺旋天线%宽带%低剖面%圆极化
高阻抗錶麵%阿基米德螺鏇天線%寬帶%低剖麵%圓極化
고조항표면%아기미덕라선천선%관대%저부면%원겁화
high impedance surface(HIS)%Archimedean spiral antenna%broadband%low-profile%circular polarization
利用高阻抗表面的同相反射特性，将其加载到阿基米德螺旋天线背腔的边缘区域，从而改善了天线增益，实现低剖面设计。仿真结果显示，与传统背腔式螺旋天线相比，增益稳定性显著提高。在3~12 GHz的工作频段内，驻波比小于2，阻抗匹配良好，辐射方向图保持稳定。在约7.8 GHz的频带宽度内轴比小于3 dB，实现了较好的圆极化性能。
利用高阻抗錶麵的同相反射特性，將其加載到阿基米德螺鏇天線揹腔的邊緣區域，從而改善瞭天線增益，實現低剖麵設計。倣真結果顯示，與傳統揹腔式螺鏇天線相比，增益穩定性顯著提高。在3~12 GHz的工作頻段內，駐波比小于2，阻抗匹配良好，輻射方嚮圖保持穩定。在約7.8 GHz的頻帶寬度內軸比小于3 dB，實現瞭較好的圓極化性能。
이용고조항표면적동상반사특성，장기가재도아기미덕라선천선배강적변연구역，종이개선료천선증익，실현저부면설계。방진결과현시，여전통배강식라선천선상비，증익은정성현저제고。재3~12 GHz적공작빈단내，주파비소우2，조항필배량호，복사방향도보지은정。재약7.8 GHz적빈대관도내축비소우3 dB，실현료교호적원겁화성능。
Based on the in-phase reflection characteristic,the high impedance surfaces are placed on the edge region of Ar-chimedean spiral antenna backed cavity to improve the antenna gain and realize low-profile design. The results of simulation show that the stability of gain is enhanced significantly compared with traditional cavity-backed spiral antenna. The VSWR is smaller than 2 in the work frequency from 3 GHz to 12 GHz,so the impedance matching is proper,and the radiation pattern re-mains stable. The axial ratio is less than 3 dB when in the bandwidth of 7.8 GHz,so that circularly polarized wave can be achieved.
